Abstract

The present disclosure relates to the technical field of solid engine burning rate test, and provides a method and system for measuring the burning rate of a propellant based on multi-channel ultrasonic waves. The method includes the following steps: collecting echo signals and corresponding noise signals of each ultrasonic channel, and pre-processing same; and finding a period of two adjacent echoes with the maximum amplitude difference, and the maximum peak of an echo period of current frame. In the present disclosure, the accuracy of echo moment is improved, and the burning rate is accurately measured under high noise environment.

IPC Classes  ?

• G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
• G01N 33/22 - FuelsExplosives

Abstract

Provided is a rotating packed bed with a novel structure. The rotating packed bed includes a housing, a driving mechanism arranged on an upper end surface of the housing, a gas inlet formed in an outer surface of the housing, a gas outlet and a liquid outlet formed in upper and lower end surfaces of the housing, respectively, and a tubular liquid distributor arranged at a center of the housing. A small centrifugal force is applied to the gas in the bed, such that the gas continues to flow in an axial direction. By arranging baffles along an axial direction, ozone can flow in an S-shaped manner in the bed, which makes a flow mode of the gas in the rotor changed.

IPC Classes  ?

• C02F 1/72 - Treatment of water, waste water, or sewage by oxidation

Abstract

A sandwich bionic soft gripper capable of automatically assisting in grasping and a preparation method therefor are provided, relating to the technical field of manipulators. The sandwich bionic soft gripper capable of automatically assisting in grasping includes a glove and fourteen power structures. Each power structure includes two drivers, a variable-stiffness grid layer, a pair of transmission skeletons, and a strain sensor. Each driver includes a flexible heat insulation layer, a flexible electric heating layer, a pair of flexible wires A, a flexible packaging layer A, a pair of liquid crystal elastomer driving layers, a thin film temperature sensor, a flexible water cooling layer, and a flexible water pipe. Each strain sensor includes a flexible sensitive layer, a flexible interdigital electrode, a flexible packaging layer B, and a pair of flexible wires B.

IPC Classes  ?

• A61H 1/02 - Stretching or bending apparatus for exercising
• B25J 1/02 - Manipulators positioned in space by hand articulated or flexible

Abstract

The present invention belongs to the field of graphene and functional rubber composites thereof, and particularly relates to a graphene-modified natural rubber that is simultaneously reinforced and toughened based on a strong interface action of a free radical annihilation reaction. A free radical adsorbent is loaded on the surface of reduced graphene oxide during the process of reducing graphene oxide, and a reduced graphene oxide-modified natural rubber composite is then prepared by using a water-phase synergistic coagulation process and a mechanical blending method. During the mechanical blending process, the free radical adsorbent, which is loaded on the surface of the reduced graphene oxide, can be subjected to an annihilation reaction with free radicals, which are generated when rubber macromolecules are subjected to the action of heat and/or force, and the reinforcing effect thereof on the interaction of a two-phase interface is greater than that of a hydrogen bond, such that the content of bound rubber of the natural rubber can be increased, the cross-linking density of the natural rubber vulcanized rubber is increased, the cross-linked network is better improved, and a simultaneously reinforced and toughened graphene-modified natural rubber composite is finally obtained. The preparation process of the present invention is simple and environmentally friendly, and does not have any harsh requirements.

IPC Classes  ?

• C08L 7/00 - Compositions of natural rubber
• C08K 9/12 - Adsorbed ingredients
• C08K 3/04 - Carbon

Abstract

Provided are a deformable tracked pipeline robot, and a differential turning method thereof. The deformable tracked pipeline robot includes a robot main body. Three tracked foot modules in a circular array are arranged on an outer side surface of the robot main body, each tracked foot module is connected to the robot main body through a center variable-diameter module. A spacing between the tracked foot module and the robot main body can be adjusted through the center variable-diameter module, making all three tracked foot modules in contact with an inner wall of a pipeline. According to a differential turning method based on space curve measurement, the pipeline robot can pass through pipelines with various curvature radii. A pipeline axis is measured by a Charge Coupled Device camera module as a bending curvature of a space curve. The accuracy of space curve fitting is improved by a recursive algorithm.

IPC Classes  ?

• F16L 55/32 - Constructional aspects of the propulsion means, e.g. towed by cables being self-contained
• B62D 55/065 - Multi-track vehicles, i.e. more than two tracks

Abstract

A method for evaluating reinforcement effect and efficiency of a filler on natural rubber based on particle size of bound rubber particles formed by the filler and natural rubber particle in a natural rubber latex, in which the natural rubber latex and the filler are mixed and diluted to obtain a to-be-detected emulsion, and an average particle size of bound rubber particles is measured using an instrument; a ratio of the average particle size to an average particle size of natural rubber particles in a pure rubber latex emulsion with the same concentration is calculated; the reinforcement effect of the filler on the natural rubber is evaluated based on the ratio; a function expression is established to derive a stress at definite elongation of various filler-modified natural rubber vulcanizates; and according to the function expression, the reinforcement efficiency of the filler on the natural rubber is evaluated.

IPC Classes  ?

• G01N 33/44 - ResinsPlasticsRubberLeather
• G01N 15/02 - Investigating particle size or size distribution

Abstract

An optimization method for molding mold and filling process of resin transfer molding (RTM) to form fiber fabric reinforced resin-based composite parts is provided. A simulation platform is used to simulate the mold filling process of RTM process. Brinkman equations are used to describe a flow of resin in fiber fabric. Numbers and positions, process parameters and material parameters of an injection gate and a discharging gate of the molding mold are set, and then the mold filling process is simulated. Darcy's law is utilized to determine a required time and a mold filling effect of the mold filling with the resin. Finally, a molding mold structure and the filling process of RTM to form fiber fabric reinforced resin-based composite part with high production efficiency and good quality are obtained.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
• B29C 70/48 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM]
• B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
• B29K 63/00 - Use of epoxy resins as moulding material
• B29K 223/00 - Use of polyalkenes as reinforcement

Abstract

A method for integrally preparing urea-formaldehyde (UF)-based multi-nutrient biodegradable polymeric slow-release (SR) liquid and granular fertilizers is provided. A hydroxymethylurea solution is prepared, and a part of the hydroxymethylurea solution is added to a reactor for reaction to obtain the UF-based multi-nutrient biodegradable polymeric SR liquid fertilizer. The rest of the hydroxymethylurea solution is fed into a reaction-extrusion integrated machine for reactive extrusion to obtain a UF polymer through the polycondensation reaction, which is extruded, dried and granulated to obtain the UF-based multi-nutrient biodegradable polymeric SR granular fertilizer. A method for applying such liquid and granular fertilizers is also provided.

IPC Classes  ?

• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05B 1/00 - Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
• C05C 9/00 - Fertilisers containing urea or urea compounds
• C05D 1/00 - Fertilisers containing potassium
• C05G 5/12 - Granules or flakes
• C05G 5/20 - Liquid fertilisers

Abstract

An artificial intelligence (AI)-based method for non-contact measurement of sheet resistance of a conductive film material, in which a non-contact measurement method commonly used in the field of electromagnetic wave absorbing-materials is adopted to measure reflection loss data of a wave-absorbing structure Salisbury screen composed of a film material and a substrate; a program-controlled AI model is adopted to predict reflection losses of Salisbury screens with different sheet resistances; the sheet resistance is continuously adjusted, and the range is gradually narrowed to fit the measured reflection loss data; and the sheet resistance of the conductive film materials is inversely deduced.

IPC Classes  ?

• G06F 30/18 - Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
• G06N 3/08 - Learning methods

Abstract

A thermal compensation design and implementation method for near-net-shape molding of a thermoset composite part based on temperature and curing degree fields is provided. A minimum symmetric unit model is established based on sizes of the part and a mold and ambient temperature. A curing kinetic model and a heat transfer model are established. A molding temperature curve is written into a subprogram. A simulated thermal compensation is performed on a region whose temperature is lower than a molding temperature with a difference of greater than or equal to 5% of the molding temperature until the temperature difference of individual regions is less than 5% of the molding temperature. The simulated thermal compensation is then performed on those regions with a curing degree less than or equal to 0.9. A thermal compensation device is assembled according to the thermal compensation scheme for experimental verification.

IPC Classes  ?

• C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
• B29C 35/02 - Heating or curing, e.g. crosslinking or vulcanising
• B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
• G06F 30/10 - Geometric CAD
• G06F 119/08 - Thermal analysis or thermal optimisation
• B29K 63/00 - Use of epoxy resins as moulding material
• B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
• B29K 307/04 - Carbon

Abstract

A method for preparing a uniformly-cured solid loading tire from a high-modulus graphene oxide/natural rubber composite is provided. A high-modulus graphene oxide/carbon black/natural rubber mixture sheet and two high-viscosity graphene oxide/carbon black/natural rubber mixture sheets are prepared, where a weight ratio of graphene oxide to natural rubber to carbon black to an interface modifying agent to an anti-aging agent to an antioxidant to a vulcanization accelerator to an activator to a softener to a vulcanizing agent is 0.5-5:100:40-120:1-20:1-10:1-10:1-20:1-20:1-20:1-20. The high-modulus rubber mixture sheet is sandwiched between the two high-viscosity rubber mixture sheets to form a sandwich-structure rubber mixture laminate, which is then processed into a strip. The strip is wound along a surface of a hub of a loading wheel, and then the hub is transferred to a mold for vulcanization to obtain the desired tire.

IPC Classes  ?

• C08J 3/24 - Crosslinking, e.g. vulcanising, of macromolecules
• B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• C08J 3/205 - Compounding polymers with additives, e.g. colouring in the presence of a liquid phase
• C08J 3/22 - Compounding polymers with additives, e.g. colouring using masterbatch techniques
• C08K 3/04 - Carbon
• C08K 3/22 - OxidesHydroxides of metals
• C08K 5/09 - Carboxylic acidsMetal salts thereofAnhydrides thereof
• C08K 5/18 - AminesQuaternary ammonium compounds with aromatically bound amino groups
• C08K 5/47 - Thiazoles
• C08K 5/548 - Silicon-containing compounds containing sulfur

Abstract

A method for preparing a graphene-modified natural rubber (NR) with an interfacial interaction based on a free radical annihilation reaction is provided. In the process of reducing graphene oxide (GO), a free radical scavenger is loaded on a surface of reduced graphene oxide (rGO). An rGO-modified NR composite is prepared through aqueous synergistic aggregating precipitation process and mechanical blending. The free radical scavenger loaded on the rGO particles are capable of annihilating macromolecular free radicals generated by NR macromolecules due to an action of heat and/or force during the mixing and milling processes, an enhancement effect of the free radical annihilation reaction on an interfacial interaction between graphene and NR is great, so as to obtain a graphene-modified NR composite with improved strength and toughness.

IPC Classes  ?

• C08K 9/00 - Use of pretreated ingredients
• C08J 3/215 - Compounding polymers with additives, e.g. colouring in the presence of a liquid phase the polymer being premixed with a liquid phase at least one additive being also premixed with a liquid phase
• C08L 7/02 - Latex

Abstract

A lightweight absorption-transmission integrated metamaterial to electromagnetic waves with polarization stability and wide-incident-angle stability, which has a symmetric structure including at least one square frequency-selective structure-unit arranged periodically. The square frequency-selective structure-unit includes a first dielectric substrate, a metal array structure layer, a second dielectric substrate, a first carbon-based conductive film array structure layer, a third dielectric substrate, and a second carbon-based conductive film array structure layer, which are laminated in sequence with the first dielectric substrate as the bottom. A method for preparing such lightweight absorption-transmission metamaterial to electromagnetic waves is also provided.

IPC Classes  ?

• H05K 9/00 - Screening of apparatus or components against electric or magnetic fields
• H01Q 17/00 - Devices for absorbing waves radiated from an antenna Combinations of such devices with active antenna elements or systems

Abstract

An optimizing method for a molding process of a part made of a fiber-reinforced polymer composite is provided. A finite element method is adopted to perform thermochemical analysis of a macroscopic model of the part and thermomechanics analysis of a microscopic model of the part, so as to simulate temperature gradient, curing degree, and residual stress of the part during the molding process. A genetic algorithm is executed, with simultaneous minimization of temperature gradient, molding time, and residual stress as an optimization goal and a curing process curve as a parameter variable, to achieve the simultaneous multi-objective optimization of molding process parameters, so as to obtain an optimized molding process.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
• G06F 111/06 - Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]
• G06F 113/22 - Moulding
• G06F 113/26 - Composites
• G06F 119/08 - Thermal analysis or thermal optimisation
• G06N 3/126 - Evolutionary algorithms, e.g. genetic algorithms or genetic programming

Abstract

An high-velocity impact-resistant wave-transparent composite, including an upper composite layer, a lower composite layer, and a bio-inspired nacre-like toughening structure arranged therebetween. The toughening structure has a soft-hard alternating nacre-like structure, and is made from a low dielectric constant sheet material and a resin. The upper composite layer and the lower composite layer are each independently made of a fiber-reinforced resin composite, a foam material, or a honeycomb material. A preparation method of the high-velocity impact-resistant wave-transparent composite is further provided.

IPC Classes  ?

• B32B 5/24 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer
• B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
• B32B 5/18 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer containing foamed or specifically porous material
• B32B 5/32 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous both layers being foamed or specifically porous

Abstract

The present invention relates to the technical field of nonmetallic compounds, and in particular to a reaction-extrusion preparation process and fertilization method for a weathered coal humic acid/urea-formaldehyde compound. In an alkaline environment, paraformaldehyde is depolymerized into formaldehyde small molecules and reacts with urea in a system to generate monomethylol urea and dimethylol urea. Then, under the strong shearing action of screws of a twin-screw reaction extruder, macromolecular weathered coal humic acid in the system is cracked into relatively small-molecular weathered coal humic acid to expose a large number of active groups of carboxyl, some of which are immediately subjected to dehydration-condensation reaction with amino on urea-formaldehyde molecules generated by polycondensation in the reaction-extrusion process in the system to generate a weathered coal humic acid/urea-formaldehyde compound, and particles of the weathered coal humic acid/urea-formaldehyde compound are obtained. The prepared compound particles have a high compressive strength, so that the breakage of fertilizer particles during storage, transportation and application can be avoided, and a fertilization and sowing integrated machine can be used to perform fertilization while sowing, thereby saving labor, time and fertilizers.

IPC Classes  ?

• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 3/80 - Soil conditioners
• C05G 5/12 - Granules or flakes
• B01J 2/20 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
• A01C 21/00 - Methods of fertilising

Abstract

The present invention relates to the technical field of dielectric materials, and specifically relates to the microwave preparation and use of a single-metal-atom-doped reduced graphene oxide dielectric material. The preparation of the present invention comprises: adding an aqueous solution of a metal salt to an aqueous dispersion of graphene oxide to obtain a mixed solution, mechanically stirring same to enable the metal salt and the graphene oxide to sufficiently interact with each other, and uniformly loading metal ions in the mixed solution onto the surfaces of lamellas of the graphene oxide by means of the interaction between the metal ions and oxygen-containing functional groups of the graphene oxide; conducting freeze-drying, so as to obtain a metal salt/graphene oxide compound; and placing the metal salt/graphene oxide compound in a microwave oven, adding an initiator, and performing a reduction reaction, so as to obtain a single-metal-atom-doped reduced graphene oxide dielectric material. In the present invention, a solid-phase microwave reduction process is used, and the reduction effect can be effectively controlled without the generation of industrial waste liquid; therefore, the process is more environmentally friendly, and the product is purer.

IPC Classes  ?

• C01B 32/184 - Preparation
• B22F 9/20 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using chemical processes with reduction of metal compounds starting from solid metal compounds
• B22F 1/12 - Metallic powder containing non-metallic particles

Abstract

It discloses an atmospheric polarized light orientation method using a solar azimuth region, provides an angle of polarization (AOP) vision-modulated model in a pixel frame, and gives an orientation strategy utilizing the solar azimuth region; a horizontal attitude angle is introduced into the AOP in the pixel frame, and orientation is implemented by utilizing a separation point and a principal point of photograph; specifically, a seed line extraction algorithm is given to update the solar azimuth in real time, a morphological expression and an AOP expression of the solar azimuth are fused for an optimum estimation to the solar azimuth, and ultimately the orientation is achieved by using an external sensor such as an inertial navigation system to input the horizontal attitude angle.

IPC Classes  ?

• G01C 21/02 - NavigationNavigational instruments not provided for in groups by astronomical means
• G06T 7/155 - SegmentationEdge detection involving morphological operators
• G06T 7/187 - SegmentationEdge detection involving region growingSegmentationEdge detection involving region mergingSegmentationEdge detection involving connected component labelling
• G06T 7/66 - Analysis of geometric attributes of image moments or centre of gravity
• G06T 7/73 - Determining position or orientation of objects or cameras using feature-based methods

Abstract

An online monitoring device for internal defects in metal selective laser melting is proposed, the online monitoring device includes a metal selective laser melting system, a signal acquisition system, and a signal processing system, the metal selective laser melting system realizes a three-dimensional (3D) printing of metal members and prints metal members with different types or levels of defects; the signal acquisition system is connected with the metal selective laser melting system, and is configured to acquire an acoustic emission signal in the 3D printing process of the metal members; the signal processing system is connected with the signal acquisition system, and is configured to extract characteristic parameters, establish a machine learning model, and discriminate and classify unknown signals in a printing process through using the machine learning model, so as to realize online monitoring of internal defects in the metal selective laser melting system.

IPC Classes  ?

• B22F 10/80 - Data acquisition or data processing
• B33Y 50/00 - Data acquisition or data processing for additive manufacturing
• G06T 7/00 - Image analysis
• G06V 10/764 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects
• G06V 10/778 - Active pattern-learning, e.g. online learning of image or video features

Abstract

A device for controlling quality of wire arc additive forming through feedback of acoustic emission comprises a wire arc additive system, an acoustic emission acquisition and identification system, and a feedback control system. The wire arc additive system is configured for forming solid parts by a wire arc additive process. The acoustic emission acquisition and identification system is configured for monitoring the wire arc additive process online and analyzing types and sizes of any resulting defects. The feedback control system is configured for analyzing monitored results and providing timely feedback to the wire arc additive system via a PID circuit. When the resulting defects are small, the types and sizes of defects are analyzed, and an instruction of correcting process parameters is sent to the wire arc additive system. When the resulting defects are too large to be remedied, a shutdown instruction is sent to the wire arc additive system.

IPC Classes  ?

• B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
• B23K 9/04 - Welding for other purposes than joining, e.g. built-up welding
• B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
• G01N 29/04 - Analysing solids
• G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques

Abstract

Preparation of a long-life load-bearing tire made of natural rubber having undergone graphene/different-particle-size carbon black synergistic modification and vulcanization modification. Carbon black having different particle sizes is subjected to surface modification to prepare a graphene oxide/different-particle-size carbon black uniform dispersion liquid, a rubber master batch is then prepared by using a water-phase synergetic coagulation-sedimentation process, and the long-life load-bearing tire made of natural rubber having undergone graphene/different-particle-size carbon black synergistic modification and vulcanization modification is eventually obtained. The dispersion of a reinforcing filler in a rubber matrix is improved by utilizing a method of compounding graphene and carbon black having different particle sizes, thereby slowing down the aging failure of the load-bearing tire while improving the hardness and mechanical properties of the rubber; moreover, the crosslinked network structure of the rubber is adjusted by regulating and controlling the ratio of a vulcanizing agent to an accelerant, thereby enabling the rubber to have better mechanical properties while improving the heat generation and hardness thereof, and therefore the service life of the load-bearing tire made of natural rubber is further prolonged.

IPC Classes  ?

• C08L 7/00 - Compositions of natural rubber
• C08K 9/04 - Ingredients treated with organic substances
• C08K 9/02 - Ingredients treated with inorganic substances
• C08K 9/08 - Ingredients agglomerated by treatment with a binding agent
• C08K 3/04 - Carbon
• B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• B29D 30/02 - Solid tyres
• B29B 7/00 - MixingKneading

Abstract

The application belongs to the technical field of signal acquisition, and discloses a stacked large-capacity signal acquisition and transmission system, which includes an adapter board, n acquisition boards, central control boards and a communication board sequentially laminated; where a circuit structure of each of the acquisition boards is the same; the adapter board is provided with circuit board interfaces and a plurality of first board-level connectors; an m-th acquisition board is provided with a signal acquisition and conditioning module, at least n−m+1 second board-level connectors and at least m third board-level connectors; the central control board is provided with a signal conversion module, at least one fourth board-level connector and at least one fifth board-level connector.

IPC Classes  ?

• H01R 31/06 - Intermediate parts for linking two coupling parts, e.g. adapter
• H01R 13/646 - Details of coupling devices of the kinds covered by groups or specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
• H01R 31/00 - Coupling parts supported only by co-operation with counterpart
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission

Abstract

A head propeller of the flying vehicle compresses incoming flow at a vehicle head inside an upper duct to a lower duct through an air suction channel. A portion of airflow is compressed to the lower duct through the air suction channel under an action of a guide plate and a vehicle body propeller. A bottom propeller of the flying vehicle compresses an airflow into pressure bins of the lower duct at a lower portion through the air suction channel. A sealing state of the pressure bins of the lower duct is destroyed. High-pressure airflow inside the lower duct is jetted out from an air outlet channel to the upper duct. A tail propeller guides the airflow to the tail portion of the vehicle body. The upper duct and the lower duct are constructed inside the pipeline, so a running resistance of the flying vehicle is reduced.

IPC Classes  ?

• B61B 13/08 - Sliding or levitation systems
• B60V 3/04 - Land vehicles, e.g. road vehicles co-operating with rails or other guiding means, e.g. with air cushion between rail and vehicle
• B61B 13/10 - Tunnel systems

Abstract

A lightweight, low-thickness, durable, and reliable multi-band radar stealth-bulletproof integrated metamaterial includes a ceramic layer, an ultrahigh molecular weight polyethylene (UHMWPE) fiber composite bulletproof layer, a graphene-based metamaterial filter layer, an UHMWPE fiber composite attenuation layer, and a carbon fiber composite reflective layer stacked in sequence. The two UHMWPE fiber composite layers are configured to attenuate radar waves. The circuit resonance of the graphene-based metamaterial filter layer is configured to generate a passband and a stopband simultaneously. The bulletproof layer and the attenuation layer are controlled by the graphene-based metamaterial filter layer in terms of working conditions in different radar frequency bands to establish a structure capable of generating λ/4 resonance at both low and high frequencies, so as to arrive at a stealth-bulletproof integrated metamaterial with small thickness and excellent dual-band radar wave absorption capability.

IPC Classes  ?

• B32B 9/00 - Layered products essentially comprising a particular substance not covered by groups
• B32B 3/14 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by a face layer formed of separate pieces of material
• B32B 9/04 - Layered products essentially comprising a particular substance not covered by groups comprising such substance as the main or only constituent of a layer, next to another layer of a specific substance
• B32B 27/12 - Layered products essentially comprising synthetic resin next to a fibrous or filamentary layer
• B32B 27/16 - Layered products essentially comprising synthetic resin specially treated, e.g. irradiated
• B32B 27/28 - Layered products essentially comprising synthetic resin comprising copolymers of synthetic resins not wholly covered by any one of the following subgroups
• F41H 5/04 - Plate construction composed of more than one layer
• H05K 9/00 - Screening of apparatus or components against electric or magnetic fields

Abstract

The present invention relates to the technical field of composite materials and forming thereof, and specifically relates to an efficient and green method for preparing a polyether ether ketone composite material reinforced by nano-modified polyether arone sized fiber cloth. The method comprises: first, preparing a nano-modified polyether arone water-based sizing agent; sizing fiber cloth by using the sizing agent; and finally, preparing a polyether ether ketone composite material reinforced by the nano-modified polyether arone sized fiber cloth by means of a slurry method. The sizing agent is free of decomposition and failure with heat in a high-temperature forming process of the composite material; moreover, a polyether arone component in the sizing agent is similar to polyether ether ketone in structure and has good compatibility with same; anchor points with a mechanical locking effect are provided by means of the introduction of nanoparticles, such that fibers and a resin are connected together by means of the mechanical locking effect; in addition, a polyether ether ketone powder is dispersed into a cosolvent/water mixed solvent and then brushed onto the fiber cloth, and polyether ether ketone more easily infiltrates fiber bundles by means of a solution, such that an infiltration path of the melt resin is shortened, and the interface performance of the composite material is also improved to a certain extent.

IPC Classes  ?

• C08J 5/06 - Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
• C08L 61/16 - Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
• C08K 9/04 - Ingredients treated with organic substances
• C08K 9/02 - Ingredients treated with inorganic substances
• C08K 7/10 - Silicon-containing compounds

Abstract

An efficient preparation method for a high-temperature-resistant wave-transmitting micro-nano multi-scale quartz fiber cloth reinforced thermoplastic composite material, comprising the following specific steps: first, uniformly dispersing low-dielectric nanoparticles and a micron high-temperature-resistant sizing polymer to obtain a sizing agent, and then carrying out ultrasonic immersion on quartz fiber cloth in the sizing agent, so that the surface of quartz fibers is coated with a composite sizing layer formed by the low-dielectric nanoparticles and the micron high-temperature-resistant polymer; dispersing the low-dielectric high-temperature-resistant nanoparticles into a high-temperature-resistant thermoplastic resin matrix by using a mechanical blending method; and finally compounding the modified quartz fibers and a thermoplastic resin to prepare the composite material. By synergistically modifying the quartz fiber cloth and the resin, a micro-nano multi-scale interface layer is formed on the interface of the composite material, thereby remarkably improving the comprehensive properties of the composite material such as mechanical properties, dielectric properties, and thermal properties; moreover, the preparation method is simple and efficient, involves low costs, and is free of environmental pollution.

IPC Classes  ?

• C08J 5/06 - Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
• C08K 3/34 - Silicon-containing compounds
• C08K 3/28 - Nitrogen-containing compounds
• C08K 3/22 - OxidesHydroxides of metals
• C08L 61/16 - Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
• C08L 79/08 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
• C08L 81/02 - PolythioethersPolythioether-ethers
• C08L 81/06 - PolysulfonesPolyethersulfones
• C08K 9/04 - Ingredients treated with organic substances
• C08K 9/02 - Ingredients treated with inorganic substances
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• C08K 7/10 - Silicon-containing compounds

Abstract

A lightweight, ballistic and blast-resistant multi-phase composite armor material based on a high-toughness heterogeneous interfacial layer, including a crack-arresting layer, a bullet-breaking layer, an energy-absorbing layer, and a support layer. The crack-arresting layer, the bullet-breaking layer, the energy-absorbing layer, and the support layer are stacked in sequence from a bullet-accepting side to the inside. Adjacent two layers are bonded with an adhesive film layer. The crack-arresting layer and the support layer are both made of a carbon fiber composite. The bullet-breaking layer is made of ceramic. The energy-absorbing layer is made of an ultra-high molecular weight polyethylene fiber composite. The adhesive film layer is made of a high-toughness heterogeneous interfacial adhesive.

IPC Classes  ?

• F41H 5/04 - Plate construction composed of more than one layer

Abstract

The present invention relates to the technical field of functional composite materials, and in particular, to a lightweight, low-thickness, long-term reliable multi-band radar stealth and bulletproof integrated metamaterial, comprising a ceramic layer, an ultra-high molecular weight polyethylene (UHMWPE) fiber composite bulletproof layer, a graphene-based metamaterial filter layer, an ultra-high molecular weight polyethylene fiber composite loss layer, and a carbon fiber reflective layer that are sequentially stacked. By the use of the two ultra-high molecular weight polyethylene fiber resin composite layers as loss layers and the circuit resonance of the graphene-based metamaterial filter layer to produce passbands and stopbands, the present invention controls the working conditions of the ultra-high molecular weight polyethylene fiber resin composite layers in different radar wave frequency bands and thus establish a structure capable of producing a λ/4 resonance simultaneously at low and high frequencies, so as to give a stealth metastructure having the advantages of lightweight, a low thickness, and excellent absorption capability in dual frequency bands based on a bulletproof structure, thus achieving the effective synergy between bulletproof performance and radar stealth performance and maintaining the ability to address radar detection even after a certain degree of strike damage.

IPC Classes  ?

• H01Q 15/00 - Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices

Abstract

The present invention belongs to the technical field of functional rubber composite materials, and particularly relates to a high-efficiency and low-cost preparation method for a high-graphene-content superfine natural rubber powder masterbatch and use. Firstly, a high-graphene-content superfine natural rubber powder masterbatch with a particle diameter lower than 5 μm is obtained by adopting a spray drying method easy for industrial production, and then the obtained high-graphene-content superfine natural rubber powder masterbatch is mixed with a natural rubber block, carbon black and the like by adopting a mechanical blending process to prepare a graphene-modified natural rubber nanocomposite material. The present invention utilizes the spray drying process to prepare the graphene-modified natural rubber superfine powder masterbatch, so that the time and energy consumption of dehydration and drying can be greatly reduced, and the production period is greatly shortened, thereby significantly reducing the cost of the graphene-modified natural rubber masterbatch, providing a new thought for the application of the graphene-modified natural rubber nanocomposite material in the tire industry, and also laying a foundation for green and environmentally friendly practices in the tire industry.

IPC Classes  ?

• C08L 7/00 - Compositions of natural rubber
• C08K 9/04 - Ingredients treated with organic substances
• C08K 3/04 - Carbon
• B29B 7/00 - MixingKneading

Abstract

The present invention relates to the technical field of non-metal compounds, particularly relates to the field of sustained-/controlled-releasing urea-formaldehyde chemical fertilizers, and particularly relates to a papermaking wood pulp byproduct sulfonated lignin/urea-formaldehyde fertilizer and a reactive extrusion granulation process. The process comprises mixing a hydroxymethylated sulfonated lignin solution and a hydroxymethylurea solution, then pumping same into a reactive extrusion all-in-one machine, reacting same until the system becomes viscous, then extruding same by a twin-screw extruder to obtain a strip-shaped product, drying same and then cutting same into granules to obtain papermaking wood pulp byproduct sulfonated lignin/urea-formaldehyde fertilizer columnar granules. With respect to the papermaking wood pulp byproduct sulfonated lignin/urea-formaldehyde fertilizer columnar granules prepared by the present invention, sulfonated lignin molecules are introduced onto the backbone of urea-formaldehyde macromolecules to reduce the degree of polymerization and the degree of crystallinity of the urea-formaldehyde fertilizer, so as to regulate the release rate of nitrogen nutrients in the fertilizer, thus solving the defect of slow nutrient release in later growth periods of crops of traditional urea-formaldehyde fertilizers, and widening the range of applicable crops of urea-formaldehyde fertilizers.

IPC Classes  ?

• C08H 7/00 - LigninModified ligninHigh-molecular-weight products derived therefrom
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 3/80 - Soil conditioners
• C05G 5/12 - Granules or flakes
• B29B 9/06 - Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion

Abstract

222OH on the surface of the starch undergo a dehydration condensation reaction under acidic and high-temperature conditions to generate a urea formaldehyde/starch polycondensate having said structure. Compared with traditional urea formaldehyde fertilizer, after starch is introduced, the present invention greatly improves the mechanical performance of prepared urea formaldehyde fertilizer particles, achieves high particle strength, and facilitates subsequent storage, transportation, and application.

IPC Classes  ?

• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 3/90 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
• C05G 5/12 - Granules or flakes

Abstract

An apparatus and method for real-time in-situ simultaneous measurement of temperature and mechanical parameters can include a charge type vibration sensing module having a temperature compensation function and a temperature/vibration coplanarly-integrated wireless surface acoustic wave (SAW) sensing module are controlled by a processing module in which a full-range temperature-vibration composite parameter compensation decoupling method is implanted, which can detect a vibration signal in a variable temperature environment. Moreover, temperature and vibration multi-parameter testing of static components in a high-temperature, narrow and closed environment can be implemented by arranging the charge type vibration sensing module having a temperature compensation function, and the temperature/vibration coplanarly-integrated wireless SAW sensing module implements health monitoring of moving components in a high-temperature and high-rotation environment.

IPC Classes  ?

• G01H 11/08 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
• G01K 7/02 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using thermoelectric elements, e.g. thermocouples
• G01K 11/26 - Measuring temperature based on physical or chemical changes not covered by group , , , or using measurement of acoustic effects of resonant frequencies

Abstract

The present invention relates to a trace element-amino acid chelate/urea-formaldehyde slow-release fertilizer and a reactive extrusion preparation process therefor. Said slow-release fertilizer consists of a biodegradable urea-formaldehyde polymer and a trace element-amino acid chelate, wherein the macromolecular chain of the biodegradable urea-formaldehyde polymer interpenetrates into a cross-linked network structure of the molecular chain of the trace element-amino acid chelate, thereby the two structures forming a polymer composite having a semi-interpenetrating network structure. Said slow-release fertilizer solves the defect of a single nutrient in existing urea-formaldehyde slow-release nitrogen fertilizers and provides various nutrients for plant growth, and also can improve the utilization efficiency of nitrogen contained in urea-formaldehyde and introduced trace elements such as ferrum, copper and zinc. In addition, the reactive extrusion granulation process has the advantages of continuous large-scale production, low investment and low cost, no use of solvents harmful to human bodies and environment, simplified volatile matter removal and granulation processes for the polymer, high efficiency, uniform product performance and the like. Therefore, the present invention has good application prospects.

IPC Classes  ?

• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility

Abstract

2 on the urea-formaldehyde molecule produced by the polycondensation of hydroxymethylurea during the reactive extrusion process to generate weathered coal-derived humic acid/urea-formaldehyde and its granules.

IPC Classes  ?

• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05F 11/02 - Other organic fertilisers from peat, brown coal, or similar vegetable deposits
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 5/12 - Granules or flakes

Abstract

An efficient microwave-assisted preparation method with one-step simultaneous reduction/embedding of a metal monatomic-doped reduced graphene oxide dielectric material. A metal salt aqueous solution is added to a graphene oxide aqueous dispersion to obtain a mixed dispersion. The mixed dispersion is mechanically stirred, such that the metal salt fully interacts with the graphene oxide, and the metal ions are uniformly loaded on a surface of the graphene oxide sheets through the interaction between metal ions and the oxygen-containing functional groups of the graphene oxide. The mixed dispersion is freeze-dried to obtain a metal salt/graphene oxide complex, which is subjected to a microwave treatment in the presence of an initiator in a microwave oven to allow reduction to obtain the metal monatomic-doped reduced graphene oxide dielectric material. An application of the metal monatomic-doped reduced graphene oxide dielectric material is also provided.

IPC Classes  ?

• C01B 32/198 - Graphene oxide
• C01B 32/184 - Preparation

Abstract

A sulfonated lignin as a by-product of papermaking wood pulp/urea-formaldehyde (UF) fertilizer and a method for preparing the same by a reactive extrusion and granulation process are provided. The method includes: mixing a hydroxymethylated sulfonated lignin solution with a hydroxymethyl-urea solution followed by feeding into a reaction-extrusion integrated machine and reaction at a preset temperature for a preset time; subjecting the reaction mixture to extrusion through a twin-screw extruder to obtain a strip product; and drying the strip product followed by granulation to obtain a sulfonated lignin as a by-product of papermaking wood pulp/UF fertilizer columnar particles. Sulfonated lignin molecules are introduced to the main chain of the UF macromolecules to reduce the polymerization degree and crystallinity of the UF fertilizer, so as to regulate the nitrogen release rate.

IPC Classes  ?

• C08H 7/00 - LigninModified ligninHigh-molecular-weight products derived therefrom
• C05F 9/00 - Fertilisers from household or town refuse

Abstract

Disclosed is a polarization fusion orientation method for an occluded environment, which comprises: acquiring a sky polarization image through a polarization camera first, then taking a heading angle output by an E-vector polarization orientation method as a state quantity, taking a heading angle output by a symmetry axis polarization orientation method as an observed quantity, realizing heading angle fusion through a multi-frequency variational Bayesian strong tracking cubature Kalman filter (MF-VBSTCKF), and respectively selecting different methods for a sampling position and a sampling interval period to update an optimal heading angle. The method solves the problem that high-precision and high-robustness heading angle measurement of polarized light cannot be realized in the occluded environment, can improve the precision and robustness of a polarized light orientation method in the occluded environment, and ensures high-frequency output of the heading angle at the same time.

IPC Classes  ?

• G01S 19/37 - Hardware or software details of the signal processing chain
• G01S 19/39 - Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO

Abstract

This disclosure relates to slow- and controlled-release fertilizers (S-CRF), and more particularly to a microelement amino acid chelate-urea formaldehyde (UF) slow-release fertilizer and a method for preparing the same by reactive extrusion. The microelement amino acid chelate-UF slow-release fertilizer includes a biodegradable UF polymer and a microelement amino acid chelate. The macromolecular chains of the biodegradable UF polymer interpenetrate in the cross-linked network structure of the chelate, so as to form a polymer composite with a semi-interpenetrating network structure.

IPC Classes  ?

• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 5/12 - Granules or flakes

Abstract

A high wear-resistant graphene-modified natural rubber and a preparation thereof. The graphene-modified natural rubber is prepared from 100 parts by weight of a modified natural rubber blend, A parts by weight of modified graphene oxide, 35-65 parts by weight of wear-resistant carbon black, 5-20 parts by weight of a wear-resistant filler, 2-7 parts by weight of zinc oxide, 1-4 parts by weight of stearic acid, 1-4 parts by weight of poly(1,2-dihydro-2,2,4-trimethylquinoline), 1-4 parts by weight of N-isopropyl-N′-phenyl-p-phenylenediamine, 1-4 parts by weight of a vulcanization accelerator, 1-2 parts by weight of sulphur, 0.1-3 parts by weight of a compatibilizer and 1-7 parts by weight of rubber processing oil, where A is greater than 0 and equal to or less than 3.

IPC Classes  ?

• C08F 36/08 - Isoprene
• C08K 3/04 - Carbon
• C08K 3/22 - OxidesHydroxides of metals
• C08K 5/09 - Carboxylic acidsMetal salts thereofAnhydrides thereof
• C08K 5/3465 - Six-membered rings condensed with carbocyclic rings
• C08K 5/18 - AminesQuaternary ammonium compounds with aromatically bound amino groups
• C08K 3/06 - Sulfur
• C08K 9/04 - Ingredients treated with organic substances
• C08K 5/44 - Sulfenamides
• C08F 36/06 - Butadiene
• C08K 5/14 - Peroxides
• C08J 3/22 - Compounding polymers with additives, e.g. colouring using masterbatch techniques

Abstract

The invention relates to the field of sensing technology, and discloses a double-parameter in-situ sensor based on waveguide grating, a sensing system and a preparation method. The sensor comprises an optical waveguide substrate, wherein a first straight optical waveguide and a second straight optical waveguide are arranged in the optical waveguide substrate in parallel, two ends of first straight optical waveguide are respectively connected with a first transmission fiber and a second transmission fiber, two ends of second straight optical waveguide are respectively connected with a third transmission fiber and a fourth transmission fiber, a first Bragg grating is arranged on the first straight optical waveguide, a second Bragg grating and a third Bragg grating are separately arranged on the second straight optical waveguide, a micro air groove is arranged on the upper surface of optical waveguide substrate, positioned between the second Bragg grating and the third Bragg grating.

IPC Classes  ?

• G02B 6/124 - Geodesic lenses or integrated gratings
• G02B 6/02 - Optical fibres with cladding
• G02B 6/12 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind

Abstract

The present invention relates to the technical field of molds for plastic molding, and disclosed are a high-precision and high-efficiency injection mold for a high-aspect-ratio double-layer cylindrical part, and a molding method using same. The injection mold comprises a support base plate (1). A movable mold fixing frame (2) and a movable mold base plate (3) are sequentially mounted at the middle of a lower surface of the support base plate (1) by means of positioning screws (31). The center of an upper surface of the support base plate (1) is provided with a lower core mold accommodating cavity, which is adapted to mount a lower core mold (14). The lower core mold (14) is provided with a lower semicircular cavity (141), which is adapted to accommodate an outer die barrel (20); a right side of the lower semicircular cavity (141) is open, and a left side of the lower semicircular cavity is provided with a lower half cavity bottom (142); the lower half cavity bottom (142) is provided with a lower semicircular hole (143), which is adapted to accommodate an inner die rod (21), and an upper surface of the lower core mold (14) is provided with a positioning protrusion (144), a lower half feeding groove (145) and a remaining groove (146). The present invention has a rational design and has a good practical application value.

IPC Classes  ?

• B29C 45/26 - Moulds
• B29C 45/33 - Moulds having transversely, e.g. radially, movable mould parts

Abstract

A lightweight bulletproof and anti-explosion multiphase composite armor material based on a high-toughness heterogeneous interface layer and a bonding method. A main structure of the multiphase composite armor material comprises a carbon fiber composite material crack arrest layer (1), a ceramic bullet breaking layer (2), an ultra-high molecular weight polyethylene fiber composite material energy absorption layer (3) and a carbon fiber composite material support layer (4) which are sequentially arranged inwards from a bullet facing surface, and any two adjacent layers are bonded together by a high-toughness heterogeneous interface adhesive film layer (5). The problems of large density, serious back protrusion and insufficient continuous shooting resistance of a current bulletproof and anti-explosion armor material can be solved. According to the bonding method, the bonding strength of the heterogeneous interface can be effectively enhanced, and the critical energy release rate is increased; moreover, the protection level of the protective armor on the penetrative damage and the non-penetrative damage is improved. In addition to bulletproof and anti-explosion armors, the bonding method can be applied to a plurality of high-speed impact resistant structures such as high-speed train bodies, various aircraft shells, and individual soldier protection equipment.

IPC Classes  ?

• F41H 5/04 - Plate construction composed of more than one layer

Abstract

A method for preparing graphene/natural rubber with simultaneously improved mechanical property, heat conduction and wear resistance, comprising: forming graphene oxide loaded with nano silicon dioxide by means of electrostatic interaction between silicon dioxide and graphene oxide; adding graphene oxide loaded with nano silicon dioxide into natural latex; preparing a graphene master batch by using an aqueous phase synergistic coagulation process; and obtaining graphene/natural rubber by means of a mechanical blending method and a vulcanization process. The electrostatic interaction between silicon dioxide and graphene oxide is a dynamic acting force which not only reinforces the crosslinked network structure of the graphene/natural rubber composite material and significantly increases the crosslinking density, but also enables the graphene filler to entangle a large amount of rubber molecular chains and enhances the interface interaction between the graphene and the rubber matrix in the dynamic movement process of the rubber, thereby improving the mechanical property, the heat conduction and the wear resistance simultaneously.

IPC Classes  ?

• C08J 3/24 - Crosslinking, e.g. vulcanising, of macromolecules
• C08L 7/00 - Compositions of natural rubber
• C08K 9/12 - Adsorbed ingredients
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• C08K 3/36 - Silica
• C08K 3/04 - Carbon

Abstract

A method for measuring surface temperature of a turbine blade includes following steps: step 1: cleaning a turbine blade and blowing dry; step 2: firstly, preparing a NiCrAlY (nickel-chromium-aluminum-yttrium) buffer layer and then preparing an YSZ (yttria-stabilized zirconia) insulating layer; step 3, preparing alumina sol; step 4, preparing an alumina insulating layer; step 5, preparing a strip-shaped platinum electrode layer; step 6, preparing a platinum-filled lead wire; step 7: firstly, connecting a platinum wire to a surface of a tail end of the strip-shaped platinum electrode layer, and then connecting a nickel-chromium alloy wire to a tenon end of the turbine blade; step 8, preparing alumina protective layers; and step 9, connecting two cold junctions of a thermocouple with a data collector.

IPC Classes  ?

• F01D 5/28 - Selecting particular materialsMeasures against erosion or corrosion
• F01D 17/08 - Arrangement of sensing elements responsive to condition of working fluid, e.g. pressure
• F01D 21/00 - Shutting-down of machines or engines, e.g. in emergencyRegulating, controlling, or safety means not otherwise provided for
• C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and

Abstract

A device and a method for the industrialized continuous and simplified preparation of a urea-formaldehyde precise-release nitrogen fertilizer or a urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer. By means of various regulation and control means such as self-polycondensation of hydroxymethyl urea or copolycondensation of hydroxymethyl urea and a modifying molecule during the reactive extrusion process, an accurate regulation and control of the nutrient release rate of a urea-formaldehyde precise-release nitrogen fertilizer or a urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer is realized. The preparation device is simple and efficient, and the preparation method is stable and easy to control, which are convenient for achieving large-scale batch continuous production. In addition, the preparation system and method have good mobility, whereby a suitable modifying substance can be selected according to the growth cycles of different crops, so as to prepare a urea-formaldehyde precise-release nitrogen fertilizer or a urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer that is matched with the nutrient requirements of the whole crop growth cycle.

IPC Classes  ?

• B01J 19/18 - Stationary reactors having moving elements inside
• B01J 4/00 - Feed devicesFeed or outlet control devices
• B01J 2/20 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
• F26B 21/10 - TemperaturePressure
• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 5/12 - Granules or flakes

Abstract

The present invention relates to the field of graphene preparation, and in particular to industrial continuous preparation equipment and process for graphene powder capable of being directly dispersed in an organic system, for use in obtaining the graphene powder capable of being directly dispersed in the organic system, which is composed of reduced graphene oxide and oil-soluble polymer micro-nano particles tightly coated on the reduced graphene oxide, wherein a part of the oil-soluble polymer micro-nano particles are, by means of a π-π conjugation effect, tightly combined with hexagonal honeycomb lattices formed by sp2 hybrid orbits in the reduced graphene oxide, and the other part of the oil-soluble polymer micro-nano particles are combined with oxygen-containing functional groups in the reduced graphene oxide by means of a covalent effect. On one hand, the surface of the reduced graphene oxide can be tightly coated with the oil-soluble polymer micro-nano particles, such that agglomeration of the reduced graphene oxide in a spray drying process is effectively prevented. On the other hand, the dried graphene powder can be easily dispersed after being transferred into the organic system, and the dispersion stability can be kept for a long time.

IPC Classes  ?

• B01F 33/82 - Combinations of dissimilar mixers
• B01F 23/80 - After-treatment of the mixture
• B01J 19/18 - Stationary reactors having moving elements inside
• C08F 120/14 - Methyl esters
• C08F 2/26 - Emulsion polymerisation with the aid of emulsifying agents anionic

Abstract

The present disclosure discloses a method for preparing large-size rare earth magnesium alloy with high-performance ingots by short process severe plastic deformation. When in use, the pushing cylinder moves upward, and the back pressure plate is adjusted to the outlet of the extrusion deformation area. After the male mold stroke is completed, the recoverable discard block fills the extrusion deformation area, and the upsetting extrusion deformation is completed. Then, the pushing cylinder drives the back pressure plate to remove from the lower part of the lower mold cavity downward, and the recoverable discard block has been broken due to the high pressure. Then, the extruded blank and residual block powder are taken out from the lower part of the lower mold cavity, restored into a plate shape for the next use. The present disclosure can solve the tail shrinking phenomenon, save materials and increase the strengthening effect.

IPC Classes  ?

• B21D 22/02 - Stamping using rigid devices or tools
• C22F 1/06 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon

Abstract

A method for preparing a graphene-containing ultra-fine powdered natural rubber masterbatch, including: mixing a diluted graphene oxide dispersion with an anionic surfactant to obtain a modified graphene oxide dispersion; mixing the modified graphene oxide dispersion with a natural rubber latex suspension to obtain a mixed emulsion; and subjecting the mixed emulsion to spray drying to obtain the ultra-fine powdered natural rubber masterbatch with a particle size of less than 5 μm. This application further provides a method for preparing a graphene-modified natural rubber nanocomposite, including: mixing the ultra-fine powdered natural rubber masterbatch with natural rubber block, and carbon black.

IPC Classes  ?

• B01J 2/06 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a liquid medium

Abstract

2-GO/NR masterbatch is subjected to mechanical blending and vulcanization to obtain the graphene/NR composite.

IPC Classes  ?

• C08K 3/36 - Silica
• C08L 7/00 - Compositions of natural rubber
• C08K 3/04 - Carbon

Abstract

An injection mold for a high-aspect-ratio double-layer cylindrical plastic part and a molding method using the same. The injection mold includes a support base plate. A movable mold fixing frame and a movable mold base plate are arranged at the middle of a lower surface of the support base plate through positioning screws. A lower core mold is matchingly provided at a center of an upper surface of the support base plate, and is provided with a lower semicircular cavity for accommodating an outer die barrel. One side of the lower semicircular cavity is open, and the other side is provided with a first end wall which is provided with a lower semicircular notch for an inner die rod to pass through. An upper surface of the lower core mold is provided with a positioning protrusion, a lower feeding groove, and a remaining groove.

IPC Classes  ?

• B29C 45/26 - Moulds
• B29C 45/16 - Making multilayered or multicoloured articles
• B29C 45/73 - Heating or cooling of the mould
• B29L 9/00 - Layered products

Abstract

A frequency measurement system and method of a radio frequency (RF) signal. The frequency measurement system includes: a magnetic field source module, a light source module, an excitation module, a complementary metal-oxide-semiconductor (CMOS) camera, and a signal processing module; the excitation module is disposed in the magnetic field; the excitation module is disposed on an output light path of the light source module; the CMOS camera is disposed on an output light path of the excitation module; and the CMOS camera is connected to the signal processing module; the light source module is configured to emit a laser; the CMOS camera is configured to capture an excitation image when the laser enters the excitation module to which a to-be-tested RF signal is applied; and the signal processing module is configured to determine a frequency of the to-be-tested RF signal according to the excitation image.

IPC Classes  ?

• G01R 29/08 - Measuring electromagnetic field characteristics

Abstract

The automatic identification hydrogen refueling system includes a ground positioning module, a hydrogen storage module, a mechanical arm, a refueling module, an automatic identification module and an information processing module. The ground positioning module is provided with a sensor. A hydrogen conveying pipeline is connected with the refueling module. The hydrogen storage module is arranged at a tail end of the ground positioning module, and connected with the mechanical arm, the information processing module and the hydrogen conveying pipeline. The information processing module controls the mechanical arm to drive the refueling module to preliminarily align a refueling connector after receiving a sensor signal. The automatic identification module identifies an accurate position of the refueling connector, the information processing module drives the mechanical arm to move until butting of the hydrogen refueling gun head and the refueling connector is completed, monitors and controls the refueling amount and the refueling pressure.

IPC Classes  ?

• B67D 7/04 - Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
• B67D 7/32 - Arrangements of safety or warning devicesMeans for preventing unauthorised delivery of liquid

Abstract

Disclosed in the present disclosure are a surface-acoustic-wave temperature and pressure sensing device and a manufacturing method thereof. The surface-acoustic-wave temperature and pressure sensing device includes a first high-temperature-resistant substrate and a second high-temperature-resistant substrate bonded together, where a recess is formed in the second high-temperature-resistant substrate to form a sealed cavity between the first high-temperature-resistant substrate and the second high-temperature-resistant substrate; first surface-acoustic-wave temperature sensors and surface-acoustic-wave pressure sensors are formed on a first surface of the first high-temperature-resistant substrate located in the cavity, and second surface-acoustic-wave temperature sensors are formed on a second surface of the first high-temperature-resistant substrate opposite the first surface; and the first surface-acoustic-wave temperature sensors, the second surface-acoustic-wave temperature sensors, and the surface-acoustic-wave pressure sensors are electrically connected to one another.

IPC Classes  ?

• G01K 11/26 - Measuring temperature based on physical or chemical changes not covered by group , , , or using measurement of acoustic effects of resonant frequencies
• G01D 21/02 - Measuring two or more variables by means not covered by a single other subclass
• G01L 1/16 - Measuring force or stress, in general using properties of piezoelectric devices
• G01L 11/04 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or by acoustic means
• H03H 9/25 - Constructional features of resonators using surface acoustic waves
• H03H 9/02 - Networks comprising electromechanical or electro-acoustic elementsElectromechanical resonators Details

Abstract

The present invention relates to the technical field of hydrogen fuel power generation, and relates specifically to a hydrogen fuel high-speed rotating magnetofluid power generation device. The device comprises a shaft portion, a cover plate portion, a thin plate portion and a combustion propelling portion. In the device, a hydrogen electrochemical reaction and unionized hydrogen direct combustion are ingeniously utilized, and jet thrust is provided for rotation while a hydrogen catalytic ionization reaction is completed. The advantage of the device is that same has higher efficiency than hydrogen fuel cells, and has high power density, which is suitable for high-power and high-energy power requirements; no key special assemblies are provided, and auxiliary systems such as heat dissipation are not required, breaking the current situation that hydrogen fuel cells are limited by proton exchange membranes and hydrogen internal combustion engines are limited by the low efficiency of a Carnot cycle.

IPC Classes  ?

• F01D 1/32 - Non-positive-displacement machines or engines, e.g. steam turbines with pressure/velocity transformation exclusively in rotor, e.g. the rotor rotating under the influence of jets issuing from the rotor
• F02C 3/16 - Gas-turbine plants characterised by the use of combustion products as the working fluid characterised by the arrangement of the combustion chamber in the plant the combustion chambers being formed at least partly in the turbine rotor
• F02K 7/00 - Plants in which the working-fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fanControl thereof

Abstract

The present disclosure discloses a surface acoustic wave temperature sensor and a manufacturing method thereof. The surface acoustic wave temperature sensor includes a sensing module and an antenna module electrically connected to each other. The antenna module includes a first high-temperature-resistant substrate and a patterned antenna formed on a surface of the first high-temperature-resistant substrate, a recess is formed in a first surface of the first high-temperature-resistant substrate, and the sensing module is fixed in the recess. The sensing module and the antenna module of the surface acoustic wave temperature sensor provided by the present disclosure form a whole. Therefore, compared with the prior art, the volume is greatly reduced, and wireless passive temperature monitoring in a high-temperature and narrow space can be better implemented. Moreover, the sensing module can be integrated in the antenna module, and such a structure is more convenient for batch processing.

IPC Classes  ?

• G01K 11/26 - Measuring temperature based on physical or chemical changes not covered by group , , , or using measurement of acoustic effects of resonant frequencies
• G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
• B22F 7/06 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools

Abstract

formaldehyde-based polymer composite is coated on a surface of the biodegradable polymer fabric, and is embedded in meshes of the biodegradable polymer fabric. There is intermolecular hydrogen-bond interaction between the biodegradable urea-formaldehyde-based polymer composite and the biodegradable polymer fabric.

IPC Classes  ?

• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05G 5/30 - Layered or coated, e.g. dust-preventing coatings
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 3/80 - Soil conditioners
• C05G 1/00 - Mixtures of fertilisers covered individually by different subclasses of class
• C05B 7/00 - Fertilisers based essentially on alkali or ammonium orthophosphates
• C09K 17/16 - Soil-conditioning materials or soil-stabilising materials containing organic compounds only applied in a physical form other than a solution or a grout, e.g. as platelets or granules
• C09K 17/28 - Urea-aldehyde condensation polymers
• D06M 15/564 - Polyureas, polyurethanes or other polymers having ureide or urethane linksPrecondensation products forming them

Abstract

Some embodiments of the disclosure provide a demodulation system for obtaining phase change parameters by a fiber-optic Fabry Perot sensor. In an embodiment, the demodulation system includes a transmitting module, a fiber-optic Fabry Perot sensor, a light splitting module, a filter module, a receiving module, and a processing module. The transmitting module transmits a beam with a predetermined wavelength range. The fiber-optic Fabry Perot sensor receives the beam and forms a reflected light beam. The light splitting module is arranged between the transmitting module and the fiber-optic Fabry Perot sensor. The filter module obtains the first light beam, the second light beam, and the third light beam. The filter module has a broadband filter. The receiving module receives the first light beam, the second light beam, and the third light beam and converts them into the first signal, the second signal, and the third signal.

IPC Classes  ?

• G01D 5/353 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre

Abstract

A method for continuously preparing graphene powder directly dispersed in an organic system, including: mixing an aqueous graphene oxide dispersion, an emulsifier and an oil-soluble monomer followed by pH adjustment and dispersing to obtain a pre-emulsified dispersion; subjecting the pre-emulsified dispersion to an emulsion polymerization reaction in the presence of an initiator; introducing a reducing agent to reduce graphene oxide; and subjecting the reaction mixture after emulsion polymerization to spray drying to obtain the graphene powder. Equipment used in the preparation method is also provided herein.

IPC Classes  ?

• C08K 3/04 - Carbon
• C08F 120/14 - Methyl esters
• C08J 3/12 - Powdering or granulating
• C08J 3/205 - Compounding polymers with additives, e.g. colouring in the presence of a liquid phase

Abstract

Some embodiments of the disclosure provides a method for preparing a sensing unit of a fiber-optic Fabry-Perot pressure sensor. The method includes the following steps. Preparing a first quartz sheet and a second quartz sheet, polishing the upper surface of the first quartz sheet, and polishing the upper surface of the second quartz sheet. Fabricating a plurality of grooves in the upper surface of the first quartz sheet. Fabricating through holes in the lower surface of the first quartz sheet, each of the through holes being coaxial with a corresponding groove and communicating with the corresponding groove. Combining the upper surface of the second quartz sheet with the upper surface of the first quartz sheet to form a laminated body. Cutting the plurality of grooves of the laminated body to obtain a plurality of sensing units.

IPC Classes  ?

• G01L 9/00 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means

Abstract

A vulcanizing agent-modified graphene prepared through an in-situ chemical deposition process and a controllable crosslinked natural rubber composite containing the same. In the preparation of the vulcanizing agent-modified graphene, graphene oxide is coated on a spherical thermal-conductive functional particle through the chemical bonding to obtain a 3D graphene particle; and a vulcanizing agent is adsorbed on the 3D graphene particle through π-π conjugation by an in-situ chemical deposition process to obtain a vulcanizing agent-modified graphene particle. Further, the vulcanizing agent-modified graphene particle is mixed with natural rubber latex, and undergoes synergistic coagulation in water to form a graphene masterbatch, which is further processed into the controllable crosslinked natural rubber composite by adding a certain amount of natural rubber block, rubber additive and reinforcing filler.

IPC Classes  ?

• C08K 3/04 - Carbon
• B60C 1/00 - Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• C08J 3/22 - Compounding polymers with additives, e.g. colouring using masterbatch techniques
• C08K 3/06 - Sulfur
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds

Abstract

The present invention relates to biodegradable polymers, particularly to a method for converting biodegradable polymers into humus with a low release amount of CO2 and use thereof. A composite material system is formed from the biodegradable polymers and the materials that can slowly release nutrient nitrogen or nutrients nitrogen and phosphorus, in which the mass ratio of carbon to nitrogen in the composite material system is (1-35):1. The materials of the present invention can promote the biodegradable polymers to be converted into soil humus or compost humus, rather than to be converted into greenhouse gas CO2, which is to be emitted into the atmosphere. Therefore, the method is of great significance for energy conservation and emission reduction, green and efficient utilization of biodegradable polymers and efficient and green utilization of biodegradable polymers wastes.

IPC Classes  ?

• C05F 11/00 - Other organic fertilisers
• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates

Abstract

A rotary ultrasonic grinding machine tool, comprising a rotary ultrasonic grinding spindle (1), an ultrasonic power transmission device (2), a spindle clamping and lifting device (3), and a part clamping and feeding device (4), wherein the rotary ultrasonic grinding spindle (1) comprises a grinding wheel (101) mounted at an output end of an amplitude transformer (103); a mandrel at a large end of the amplitude transformer (103) extends into a hollow sleeve (106) to be connected to an output end face of a transducer (107); the transducer (107) is connected to an inner surface of the hollow sleeve (106) in a transition fitting manner by means of a positioning flange (109); the hollow sleeve (106) is mounted in a supporting base (102); and a tail end of the hollow sleeve (106) is connected to an electric spindle (112) by means of a coupler (111). Further comprised is a method for using the rotary ultrasonic grinding machine tool. The rotary ultrasonic grinding spindle is directly driven by the electric spindle, thereby improving the grinding efficiency, reducing the grinding force and grinding heat, and improving the part machining quality.

IPC Classes  ?

• B24B 1/04 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
• B24B 41/06 - Work supports, e.g. adjustable steadies
• B24B 41/04 - HeadstocksWorking-spindlesFeatures relating thereto
• B24B 47/20 - Drives or gearings for grinding machines or devicesEquipment therefor relating to feed movement

Abstract

This disclosure relates to slow- and controlled-release fertilizers, and more particularly to a device and a method for industrialized continuous and simplified preparing a urea-formaldehyde slow-release nitrogen fertilizer or a urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer. Hydroxymethylurea is produced through the reaction extrusion of urea and formaldehyde. Through the self-ploycondensation of the hydroxymethylurea or the co-polymerization of the hydroxymethylurea and a modifier in a reactive extruder, the urea-formaldehyde slow-release nitrogen fertilizer or the urea-formaldehyde-based slow- and controlled-release multi-nutrient fertilizer is prepared.

IPC Classes  ?

• C05C 9/00 - Fertilisers containing urea or urea compounds
• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05G 5/12 - Granules or flakes

Abstract

A method of producing a thermoplastic starch by an in-situ reactive extrusion plasticization process and a method for preparing a starch/polymer blend by an in-situ reactive extrusion plasticization and compatibilization process. In the method, a plasticizer reaction precursor (or a plasticizing compatibilizer reaction precursor) is mixed with starch to adhere to the surface of the starch or enter the starch to break the intermolecular and intramolecular hydrogen bonds of the starch. Then a mixture of the plasticizer reaction precursor (or the plasticizing compatibilizer reaction precursor) and starch is subjected to extrusion to produce the thermoplastic starch (or the starch/polymer blend), where the reaction precursor undergoes an in-situ reaction on the surfaces of the starch and in the starch to form a macro-molecular plasticizer (or a plasticizing compatibilizer) to plasticize starch or provide plasticizing and compatibilizing effect on the starch/polymer blend.

IPC Classes  ?

• C08J 3/18 - Plasticising macromolecular compounds
• C08J 3/00 - Processes of treating or compounding macromolecular substances

Abstract

The present disclosure relates to a thermal-acoustic-vibration three-parameter integrated in-situ sensor and system with a high-temperature-resistant and high-pressure-resistant structure. The provided thermal-acoustic-vibration three-parameter integrated in-situ sensor with a high-temperature-resistant and high-pressure-resistant structure comprises a heat detection device, a sound detection device and a vibration detection device; and the sound detection device and the vibration detection device are distributed on two sides of the heat detection device. When heat, sound and vibration need to be detected, only spectra of light signals emitted by the heat detection device, the sound detection device and the vibration detection device need to be obtained, and heat information, sound information and vibration information to be detected are obtained through the corresponding relation between the spectra of the optical signals emitted by the heat detection device, the sound detection device and the vibration detection device and heat information, sound information and vibration information to be detected.

IPC Classes  ?

• G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass

Abstract

A method for preparing a graphene masterbatch by an aqueous phase synergistic aggregating precipitating process and a method for molding a long-lifespan tire for a loading wheel of a heavy-duty vehicle. In this application, a graphene oxide aqueous dispersion and natural rubber latex are taken as raw materials, and subjected to co-precipitating in a water medium to prepare a high-graphene content masterbatch with individual components evenly dispersed. The graphene masterbatch is further subjected to two-stage high-temperature mechanical blending with a natural rubber block to achieve the uniform dispersion of graphene in a rubber composites.

IPC Classes  ?

• C08K 3/04 - Carbon
• C08J 3/22 - Compounding polymers with additives, e.g. colouring using masterbatch techniques

Abstract

Disclosed is a method for preparing a nitrogen-rich or nutritious straw-based slow-release fertilizer through In-Situ straw modification/reactive extrusion integrated continuous process. In the method, the liquid reaction precursor of a nitrogen-containing biodegradable slow-release fertilizer is mixed with crop straw to obtain a reaction mixture, or the liquid reaction precursor of a nitrogen-containing biodegradable slow-release fertilizer, crop straw and a soluble fertilizer are mixed to obtain a reaction mixture. The reaction mixture is subjected to extrusion in a screw extruder to produce the nitrogen-rich or nutritious straw-based slow-release fertilizer.

IPC Classes  ?

• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility

Abstract

The present invention discloses a highly efficient and environment-friendly reactive extrusion integrated continuous preparation process for a biodegradable polymeric multi-nutrient elements nano slow/controlled-release fertilizer and a biodegradable polymeric multi-nutrient elements nano slow/controlled-release fertilizer prepared by the process consisting of urea-formaldehyde macromolecular chains and nano-phosphate. Firstly preparing a methylolurea solution, and then feeding the same into a reactive extrusion integrated machine, adding a phosphate, starting the reaction unit of the reactive extrusion integrated machine to carry out the reaction, and simultaneously starting the vacuumizing devolatilization apparatus to remove moisture from the reaction system; after completing the reaction, starting the extrusion unit of the reactive extrusion integrated machine, extruding to obtain a strip-shaped product, and drying and granulating the same to obtain a finished product. The present invention can achieve forced discharge of the output end of the reaction unit by integrating the extrusion unit and the reaction unit, thereby realizing continuous production of the biodegradable polymeric multi-nutrient nano slow/controlled-release fertilizer. The biodegradable polymeric multi-nutrient nano slow/controlled-release fertilizer prepared by the present invention is firmly bonded between macromolecular chains of urea-formaldehyde through hydrogen bonding, which could impart excellent slow-release performances to nitrogen, phosphorus, potassium and other medium and trace elements; thereby the nutrient use efficiency of the fertilizer is greatly improved.

IPC Classes  ?

• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05C 9/00 - Fertilisers containing urea or urea compounds
• C05B 7/00 - Fertilisers based essentially on alkali or ammonium orthophosphates
• C05G 1/00 - Mixtures of fertilisers covered individually by different subclasses of class

Abstract

A system for simultaneously and microscopically measuring vapor cell coating film energy transfer and relaxation characteristics at nanometer scales includes a space relaxation characteristic detection unit which includes a laser, an optical isolator, a spatial light filter, a reflector, a Glan-Taylor polarizer, a first quarter-wave plate, a spatial light modulator, a focusing lens, a second quarter-wave plate, a polarizing film, a PD detection unit, an I/V amplification unit, a data acquisition unit, a spectroscope and an optical chopper, an atomic force microscope detection unit for energy transfer micro-areas, a shielding cylinder, a coated alkali metal atomic vapor cell, a data processing unit and a magnetic field controlled coil. The energy transfer micro-area detection unit includes coated samples, a probe, an oscillator, a laser, a four-quadrant photoelectric detection unit, a band-pass filter unit, an automatic gain controller, an adder, a piezoelectric scanning cylinder, a sample table and a PI controller.

IPC Classes  ?

• G01Q 60/24 - AFM [Atomic Force Microscopy] or apparatus therefor, e.g. AFM probes
• G01N 21/01 - Arrangements or apparatus for facilitating the optical investigation
• G01N 21/84 - Systems specially adapted for particular applications

Abstract

A ducted fan device integrated with a permanent magnet synchronous disc-type flat wire electric motor, comprising a rotor system, a stator system, an intake/exhaust control system, a detection system, a drive system and a power supply system. The stator system comprises an electric motor housing (5). Upper and lower end faces of an inner wall of the electric motor housing (5) are each provided with a flat wire coil (4), and the flat wire coils (4) on the end faces are connected in series. The rotor system is arranged inside the stator system, and the rotor system comprises axial and radial composite integrated blades (1) and permanent magnets (3). The permanent magnets (3) replace a portion of centrifugal fan blades and are located on the outside. The detection system is electrically connected to the electric motor housing (5) and the power supply system. The drive system is electrically connected to the flat wire coils (4) and the power supply system. The detection system is electrically connected to the drive system. The present device implements the suspension and high-speed rotation of the rotor system, omits a bearing mechanism, reduces weight, reduces mechanical wear and noise, prolongs the service life, and reduces costs.

IPC Classes  ?

• H02K 21/14 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
• H02K 1/27 - Rotor cores with permanent magnets
• H02N 15/00 - Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
• F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation

Abstract

2 absorption vessel connected in sequence through connecting pipes. A top of the hollow leaching device is provided with an end cover. An external water distributor filled with a leaching solution and a mechanical stirring device is arranged above the end cover. The external water distributor is in communication with an inner cavity of the hollow leaching device through a pipeline. A stirring shaft of the mechanical stirring device extends into the inner cavity. A stirring shaft is provided with a stirring paddle.

IPC Classes  ?

• G01N 33/44 - ResinsPlasticsRubberLeather
• G01N 1/24 - Suction devices
• G01N 1/38 - Diluting, dispersing or mixing samples
• C12M 1/00 - Apparatus for enzymology or microbiology
• C12M 1/02 - Apparatus for enzymology or microbiology with agitation meansApparatus for enzymology or microbiology with heat exchange means
• C12M 1/12 - Apparatus for enzymology or microbiology with sterilisation, filtration, or dialysis means
• C12M 1/04 - Apparatus for enzymology or microbiology with gas introduction means

Abstract

A large-field-of-view high-resolution imaging device includes an imaging array formed by splicing and combining a plurality of imaging units and a CSI phosphor screen. Each imaging unit is formed by coupling an array of light cones in series and an enhanced CCD. The series light cone array is formed by connecting a large light cone and a small light cone in series such that a small end face of the large light cone is connected with a large end face of the small light cone, a large end face of the large light cone is attached to the CSI phosphor screen, and a small end face of the small light cone serves as an input window of an image enhancer. The enhanced CCD is formed by coupling the image enhancer and a CCD camera. A photosensitive screen of the CCD camera serves as an output window of the image enhancer.

IPC Classes  ?

• H04N 23/55 - Optical parts specially adapted for electronic image sensorsMounting thereof
• G03B 42/02 - Obtaining records using waves other than optical wavesVisualisation of such records by using optical means using X-rays
• H04N 23/54 - Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• H04N 25/60 - Noise processing, e.g. detecting, correcting, reducing or removing noise

Abstract

A gradient electrically conductive-uniform thermally conductive dual network structure-based electromagnetic shielding polymer composite with low reflection and high absorption and a preparation method thereof. The electromagnetic shielding polymer composite includes a gradient conductive carbon nanotube network with a vertically oriented cell structure and a uniformly thermally conductive hexagonal boron nitride/carbon nanotube network constructed by the hexagonal boron nitride dispersed uniformly in the carbon nanotube network and the gradient carbon nanotube network. The gradient electrically conductive carbon nanotube network and the uniformly thermally conductive hexagonal boron nitride/carbon nanotube network form a composite synergistic dual function network structure so as to make the electromagnetic shielding polymer composite have a low reflection and high absorption and excellent thermal conductivity.

IPC Classes  ?

• H05K 9/00 - Screening of apparatus or components against electric or magnetic fields
• C08K 3/04 - Carbon
• C08K 3/38 - Boron-containing compounds
• B29C 39/00 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor
• C08K 9/00 - Use of pretreated ingredients
• C08L 75/04 - Polyurethanes
• C08L 83/06 - Polysiloxanes containing silicon bound to oxygen-containing groups
• B29K 75/00 - Use of polyureas or polyurethanes as moulding material
• B29K 83/00 - Use of polymers having silicon, with or without sulfur, nitrogen, oxygen or carbon only, in the main chain, as moulding material
• B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
• B82Y 40/00 - Manufacture or treatment of nanostructures

Abstract

The present disclosure provides a cuboid magnetometer with high fluorescence collection efficiency, used for cardiac magnetic field measurement, and based on nitrogen-vacancy (NV) centers in diamond, and a cardiac magnetic field measurement system. The cardiac magnetic field measurement system includes a magnetic shielding chamber, a non-magnetic bed, an array probe for cardiac magnetic field measurement, a three-axis displacement platform, a high-speed data collection card, a fiber laser source, a microwave source, and a computer. The array probe for cardiac magnetic field measurement includes a non-magnetic shell, a stepping motor, a porous rotary fiber coupling apparatus, a fiber bundle set, a special photodetector (PD) set, a filter set, a ring-shaped antenna, and special diamond.

IPC Classes  ?

• A61B 5/05 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fieldsMeasuring using microwaves or radio waves
• A61B 5/243 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetocardiographic [MCG] signals
• A61B 5/00 - Measuring for diagnostic purposes Identification of persons
• G01N 21/64 - FluorescencePhosphorescence

Abstract

The disclosure provides a method for preparing a multiple-material variable-rigidity component by efficient collaborative additive manufacturing, relates to the technical field of additive manufacturing. In the disclosure, the method comprises: pretreating a component structure model and dividing the component structure model into a lightweight part with complex pore structures and a solid part that needs to be manufactured rapidly; preparing the lightweight part by a selective laser melting prototyping; performing a surface treatment on the prepared lightweight part to obtain a treated lightweight part; preparing the solid part on the treated lightweight part by a wire arc additive manufacturing, to obtain a component.

IPC Classes  ?

• B23K 26/348 - Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups , e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
• B23K 26/342 - Build-up welding
• B23K 26/60 - Preliminary treatment
• B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing
• B22F 10/85 - Data acquisition or data processing for controlling or regulating additive manufacturing processes
• B22F 10/50 - Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up
• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• B23K 9/04 - Welding for other purposes than joining, e.g. built-up welding
• B23K 37/02 - Carriages for supporting the welding or cutting element

Abstract

A system of automatic adjustment of a laser reflection path, comprising a central processing device, a driving device, a four-quadrant photodetector, a driving arm, a micro cantilever, a sample, a sample placing table, a light reflector, a laser, a CCD equipped with an optical microscope, a vibration sensor, a signal processing circuit, a display device, a storage device, and a control device; a system of automatic adjustment of the laser reflection path is controlled by the control device, wherein a laser beam is emitted by the laser, an image collected by the CCD equipped with the optical microscope is processed by the central processing device to identify the micro cantilever, and then a driving arm is driven by a driving device to drive the micro cantilever to move to the center of a laser spot, during which vibration signals of the driving arm are also under monitoring.

IPC Classes  ?

• G02B 21/00 - Microscopes
• G02B 21/02 - Objectives
• G02B 21/36 - Microscopes arranged for photographic purposes or projection purposes

Abstract

The invention relates to the field of preparing biodegradable polymer slow/controlled release composite, in particular to a biodegradable polymer slow/controlled release binary composite urea-formaldehyde/poly(butylene succinate) and a biodegradable polymer slow/controlled release ternary nanocomposite urea-formaldehyde/poly(butylene succinate)/potassium dihydrogen phosphate. The following steps are included: uniformly mixing two components poly(butylene succinate) and methylol-urea or three components poly(butylene succinate), methylol-urea and potassium dihydrogen phosphate, and then extruding the resulting mixture by an extruder, and the biodegradable polymer slow/controlled release composite urea-formaldehyde/poly(butylene succinate) containing nutrient N and the biodegradable polymer slow/controlled release nanocomposite urea-formaldehyde/poly(butylene succinate)/potassium dihydrogen phosphate containing nutrients of N, P and K are obtained respectively. As one of the raw materials, methylol-urea, the precursor of urea-formaldehyde, can react by way of melt polycondensation to form urea-formaldehyde macromolecular chains with different polymerization degrees at high temperature in the extruder, which are dispersed among the PBS macromolecular chains, thereby obtaining the composite UF/PBS of the present invention; and the hindering effect of the molecular segments of urea-formaldehyde and poly(butylene succinate) and the hydrogen bond interaction between the components result in that potassium dihydrogen phosphate crystals dissolved in the water produced by the polycondensation reaction are restricted to nanoscale during their precipitation process, so as to prepare nanocomposite UF/PBS/MKP. The prepared composites all have excellent mechanical properties, and can be directly used as a biodegradable polymer slow/controlled release fertilizer, or as a matrix polymer to prepare other types of slow release fertilizers, and the formulae with high PBS contents can also replace PBS to prepare other agricultural implements, such as agricultural films, nursery pots and vegetation nets.

IPC Classes  ?

• C08F 283/02 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polycarbonates or saturated polyesters
• C08G 71/02 - Polyureas

Abstract

Disclosed is a large-field-of-view high-resolution imaging device, comprising: an imaging array formed by splicing and combining a plurality of imaging units, and a CsI fluorescent screen. Each imaging unit is formed by coupling a series light cone array and an enhanced CCD; the series light cone array is used for conducting a light signal and is formed by connecting a large light cone and a small light cone in series, a small end surface of the large light cone is connected to a large end surface of the small light cone in series, and the large end surface of the large light cone is attached to the CsI fluorescent screen; the small end surface of the small light cone is used as an input window of an image enhancer; the enhanced CCD is formed by coupling the image enhancer and a CCD camera; the image enhancer is used for increasing detection efficiency and improving image brightness and contrast; the CCD camera is used for converting an optical signal into an electric signal and storing imaging information in the form of a digital signal; and a photosensitive screen of the CCD camera is used as an output window of the image enhancer.

IPC Classes  ?

• H04N 5/225 - Television cameras
• H04N 5/217 - Circuitry for suppressing or minimising disturbance, e.g. moire or halo in picture signal generation
• G03B 42/02 - Obtaining records using waves other than optical wavesVisualisation of such records by using optical means using X-rays

Abstract

The present disclosure provides an extrusion forming die for a cabin component. The extrusion forming die for a cabin component comprises an upper die assembly, a lower die assembly and a combined concave die. The upper die assembly comprises an extrusion punch (3), and the combined concave die comprises an M-shaped outer concave die (4) having a hollow cavity matched with the extrusion punch (3), and a W-shaped inner concave die (5) having a rotary cavity. The W-shaped inner concave die (5) is arranged in the rotary cavity of the M-shaped outer concave die (4) in a matched manner, and the rotary cavity and the hollow cavity are matched to form a rotary extrusion die cavity (18) with a W-shaped longitudinal section.

IPC Classes  ?

• B21C 23/18 - Making uncoated products by impact extrusion
• B21C 25/02 - Dies

Abstract

The present disclosure provides a rotary extrusion forming method for a cabin section workpiece, comprising the following steps of: first preparing a hollow truncated cone-shaped blank; heating the prepared blank to a molding temperature and holding, and preheating a female die and a male die to above the molding temperature and holding; assembling an upper die assembly on a press; applying lubricant on the female die and the male die, and placing and fixing the blank into a die cavity of the female die; starting up a rotation driving device to drive the female die to rotate on a lower die base, so that the female die drives the blank to rotate; starting up the press to make the male die move down to a machining position of the blank in the female die cavity through the upper die assembly, and machining inner side walls of the blank.

IPC Classes  ?

• B21C 25/08 - Dies or mandrels with section variable during extruding, e. g for making tapered workControlling variation
• B21C 23/14 - Making other products

Abstract

Provided are an ion thruster and method for fabrication thereof, the ion thruster fabrication method comprising: a plurality of prefabricated ceramic tiles (p) are stacked and laminated to form a front part (51); a plurality of prefabricated ceramic tiles (p) are stacked and laminated to form a rear part (B); assembling the front part (51) and the rear part (B) in a sintering mold, the front part (51) fitting closely with a tapered part (b1) of the rear part (B); placing a main cathode (1) into a cathode hole (k1) on the front part, and filling the cathode hole (k1) with a ceramic slurry to fix the main cathode (1); placing the sintering mold in a heating furnace for sintering. The ion thruster employs a modular processing method; when each module is manufactured, a method of stacking a plurality of prefabricated ceramic tiles (p) together and laminating them is used; the invention has the advantages of a simple process and low cost, and the fabricated ion thruster is small in size and has good high-temperature resistance.

IPC Classes  ?

• F03H 1/00 - Use of plasma to produce a reactive propulsive thrust

Abstract

Disclosed is a magnetic photoacoustic composite non destructive testing device for a power transmission line of a photovoltaic grid based on a corona effect. The device may include a mechanical structure part and a data processing part. The mechanical structure part may include a shielding shell and mounting bases, shielding bodies are mounted on two sides of the shielding shell, a top of the shielding shell is provided with an upper cover, two sides under the upper cover are provided with the mounting base respectively, and the two mounting bases are located above the shielding bodies respectively. The data processing part may include a pair of optical sensing modules, a pair of magnetic sensing modules, an acoustic sensing module, a humidity sensing module, a micro-processor, a signal conditioning and transmission unit and an internal power supply management module.

IPC Classes  ?

• G01R 31/08 - Locating faults in cables, transmission lines, or networks

Abstract

A pressure-sensitive chip, a pressure sensor, and a pressure monitoring system. In an embodiment, a pressure-sensitive chip and a signal processing module are packaged to form a pressure sensor. The pressure sensor and a display instrument are connected to form a pressure monitoring system. A pressure-sensitive chip is a ceramic body made of eight green ceramic sheets by stacking and sintering, and includes two capacitors. In another embodiment, a pressure signal of a measurement area is obtained by a method including the following steps: sensing a pressure in a measurement area by the pressure-sensitive chip; generating a capacitance signal by the pressure-sensitive chip; converting the capacitance signal to a voltage signal by the signal processing module; and converting the voltage signal into the pressure signal by the display instrument.

IPC Classes  ?

• G01L 9/00 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
• G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges

Abstract

A multi-parameter surface acoustic wave sensing device and a manufacturing method therefor. The multi-parameter surface acoustic wave sensing device comprises a high-temperature-resistance piezoelectric crystal substrate (1), and a first resonator (2), a second resonator (3) and a third resonator (4) provided away from one another; a cantilever beam (11) and a sealed cavity (12) are formed on the high-temperature-resistance piezoelectric crystal substrate (1), and the high-temperature-resistance piezoelectric crystal substrate (1) has a flat first surface (S1) and an opposite second surface (S2); the first resonator (2) is formed on the first surface (S1) corresponding to the cantilever beam (11) and used for sensing a vibration parameter; the second resonator (3) is formed on the first surface (S1) corresponding to the cavity (12) and used for sensing a pressure parameter; the third resonator (4) is formed on the first surface (S1) and used for sensing a temperature parameter; response antennas (5) are formed on the second surface (S2), and the response antennas (5) are electrically connected to the first resonator (2), the second resonator (3), and the third resonator (4). The multi-parameter surface acoustic wave sensing device can be used for parameter measurement in a plurality of positions such as engine combustors, aircraft and spacecraft surfaces, engines, and aircraft wings.

IPC Classes  ?

• G01D 5/48 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using wave or particle radiation means
• G01M 15/05 - Testing internal-combustion engines by combined monitoring of two or more different engine parameters
• G01K 11/26 - Measuring temperature based on physical or chemical changes not covered by group , , , or using measurement of acoustic effects of resonant frequencies
• G01L 1/16 - Measuring force or stress, in general using properties of piezoelectric devices

Abstract

The present invention relates to a method of semi-solid indirect squeeze casting for Mg-based composite material, which aims at improving the mechanical property of the cast by adding magnesium zinc yttrium quasicrystal of high hardness, high elastic modulus and excellent matrix binding property acting as the reinforcement into the magnesium alloy matrix and manufacturing the cast through smelting using a vacuum atmosphere smelting furnace, agitating with ultrasonic wave assisted vibration in the rotating impeller jet agitation furnace and indirect squeeze casting against the problem of poor wettability, easy agglomeration, inhomogeneous distribution between the reinforcement particles and the matrix materials and poor properties of the manufactured cast. The manufacturing method of the present invention has advanced technologies and detailed and accurate data. The cast has excellent microstructure compactness, no shrinkage cavities and shrinkage defects and the primary phase in the metallographic structure consists of spherical and near-spherical crystalline grains, wherein dendritic crystalline grains almost disappear and the size of the crystalline grain is obviously refined. The tensile strength of the Mg-based composite material cast reaches to 225 Mpa, the elongation rate thereof reaches to 6.5% and the hardness thereof reaches to 86 HV. So the manufacturing method of the present invention is an advanced semi-solid indirect squeeze casting method for the Mg-based composite material.

IPC Classes  ?

• B22D 18/02 - Pressure casting making use of mechanical pressing devices, e.g. cast-forging
• B22D 21/00 - Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedureSelection of compositions therefor
• C22C 1/02 - Making non-ferrous alloys by melting
• C22C 1/10 - Alloys containing non-metals
• C22C 23/00 - Alloys based on magnesium

Abstract

Some embodiments of the disclosure provide an optical fiber Fabry-Perot sensor (1), and a manufacturing method thereof. According to an embodiment, the optical fiber Fabry-Perot sensor (1) includes a hollow tube body (10), a first optical fiber (20), and a second optical fiber (30). The hollow tube body (10) has a first tube body (11), a cavity portion (12), and a second tube body (13) sequentially arranged in an axial direction. The first optical fiber (20) is provided within the first tube body (11) in the axial direction and has a first light guide end face (21) provided within the cavity portion (12). The second optical fiber (30) is provided in the second tube body (13) in the axial direction and has a second light guide end face (31) provided within the cavity portion (12).

IPC Classes  ?

• G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
• G01L 11/02 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or by optical means
• G02B 6/38 - Mechanical coupling means having fibre to fibre mating means

Abstract

The present invention relates to the technical field of film heat-flow sensors, and provides a 3D direct-writing aluminum oxide ceramic film heat-flow sensor and a manufacturing method therefor having high potential signal and sensitivity and short response time and capable of stably working in a high temperature environment to realize stable reading of a thermoelectric potential signal. The technical solution is as follows: a 3D direct-writing aluminum oxide ceramic film heat-flow sensor comprises an upper temperature gradient isolation layer, an upper thermocouple pile, a positive lead-out electrode, a connector, a micron-order ceramic substrate, a lower thermocouple pile, a negative lead-out electrode, and a lower temperature gradient isolation layer. The upper thermocouple pile generated by 3D printing is formed on the upper surface of the micron-order ceramic substrate. The upper thermocouple pile is coated with the upper temperature gradient isolation layer. The lower thermocouple pile generated by 3D printing is formed on the lower surface of the micron-order ceramic substrate. The lower thermocouple pile is coated with the lower temperature gradient isolation layer. The present invention can be applied to the field of temperature gradient measurement.

IPC Classes  ?

• G01K 17/20 - Measuring quantity of heat conveyed by flowing media, e.g. in heating systems based upon measurement of temperature difference across a radiating surface, combined with ascertainment of the heat-transmission coefficient
• G01K 7/02 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using thermoelectric elements, e.g. thermocouples

Abstract

The invention relates to the field of slow/controlled release fertilizer, in particular to a urea-formaldehyde-based multi-nutrient slow/controlled release fertilizer and a preparation method thereof. The urea-formaldehyde-based multi-nutrient slow/controlled release fertilizer comprises ammonium polyphosphate, inorganic silica gel and urea-formaldehyde, wherein the phosphorus-oxygen double bond of ammonium polyphosphate can at least form hydrogen bond linkage with a urea-formaldehyde molecule chain, the hydroxyl group of the inorganic silica gel can at least form hydrogen bond linkage with the urea-formaldehyde molecular chain, and ammonium polyphosphate, inorganic silica gel and urea-formaldehyde together form a hydrogen bond associated polymer network structure. The invention can prepare a urea-formaldehyde-based multi-nutrient slow/controlled release fertilizer comprising a strong hydrogen bond network structure by using a conventional aqueous solution polymerization in combination with a normal temperature extrusion granulation process, avoiding the coating process in the latter stage of the preparation of a coated fertilizer, achieving a simple and effective preparation process, and saving a lot of manpower and material resources. The urea-formaldehyde-based multi-nutrient slow/controlled release fertilizer provided by the invention can stably and continuously release nitrogen nutrient throughout the release period, thereby making up for the shortcoming of excessively long nutrient release period of the existing urea-formaldehyde fertilizers.

IPC Classes  ?

• C05B 7/00 - Fertilisers based essentially on alkali or ammonium orthophosphates
• C05B 13/00 - Fertilisers produced by pyrogenic processes from phosphatic materials
• C05C 9/02 - Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
• C05B 19/00 - Granulation or pelletisation of phosphatic fertilisers other than slag
• A01C 21/00 - Methods of fertilising
• C05G 5/12 - Granules or flakes
• A01G 22/20 - Cereals
• A01G 22/22 - Rice
• A01G 22/00 - Cultivation of specific crops or plants not otherwise provided for

Abstract

An optical fiber Fabry-Perot sensor (1), and a manufacturing method thereof. The optical fiber Fabry-Perot sensor (1) comprises: a hollow tubular member (10) having a first tubular member (11), a cavity portion (12), and a second tubular member (13) sequentially arranged in an axial direction; a first optical fiber (20) provided within the first tubular member (11) in the axial direction, the first optical fiber (20) having a first light-transmitting end surface (21) provided within the cavity portion (12); and a second optical fiber (30) provided in the second tubular member (13) in the axial direction and having a second light-transmitting end surface (31) provided within the cavity portion (12), wherein the first light-transmitting end surface (30) and the second light-transmitting end surface (31) are spaced apart by a pre-determined distance and opposingly arranged, and the inner diameter of the cavity portion (12) is greater than the diameter of any one of the first tubular member (11) and the second tubular member (13).

IPC Classes  ?

• G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
• G01B 11/16 - Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
• G01L 11/02 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or by optical means

Abstract

This disclosure relates to water-absorbing and slow/controlled release fertilizer, in particular to a water-absorbing and water-retaining multi-nutrient biodegradable polymeric slow/controlled release fertilizer having a semi-interpenetrating network structure, and preparation methods thereof. The method can comprises the steps of: reacting formaldehyde with urea to obtain a hydroxymethyl urea solution; adding acrylic acid and acrylamide monomers into another reactor, and adding a KOH solution to adjust the neutralization degree of acrylic acid, then adding one of inorganic clay, pretreated crop straw or cellulose, then adding initiator, monopotassium phosphate and the prepared hydroxymethyl urea solution sequentially; allowing to react at temperature after being mixed uniformly to obtain a viscous product; and granulating the viscous product and oven drying the same to obtain the fertilizer. The fertilizer prepared according to the present invention has strong water-absorbing and water-retaining capacity, and an excellent slow release performance for nitrogen, phosphorus and potassium contained as nutrients.

IPC Classes  ?

• C05G 5/40 - Fertilisers incorporated into a matrix
• C09K 17/22 - PolyacrylatesPolymethacrylates
• C09K 17/28 - Urea-aldehyde condensation polymers
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C05G 3/80 - Soil conditioners
• C05B 7/00 - Fertilisers based essentially on alkali or ammonium orthophosphates
• C08F 292/00 - Macromolecular compounds obtained by polymerising monomers on to inorganic materials
• C05B 19/00 - Granulation or pelletisation of phosphatic fertilisers other than slag
• C08F 251/02 - Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
• C05B 17/00 - Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal

Abstract

A method for manufacturing a quasicrystal and alumina mixture particles reinforced magnesium matrix composite, includes manufacturing a quasicrystal and alumina mixture particles reinforcement phase, including preparing raw materials for the quasicrystal and alumina mixture particles reinforcement phase including a pure magnesium ingot, a pure zinc ingot, a magnesium-yttrium alloy in which the content of yttrium is 25% by weight, and nanometer alumina particles, the elements having the following proportion by weight 40 parts of magnesium, 50-60 parts of zinc, 5-10 parts of yttrium and 8-20 parts of nanometer alumina particles of which the diameter is 20-30 nm, pretreating the metal raw materials, cutting the pure magnesium ingot, the pure zinc ingot and the magnesium-yttrium alloy into blocks, removing oxides attached on the surface of each metal block, placing the blocks into a resistance furnace to preheat at 180° C. to 200° C., and filtering out the absolute ethyl alcohol after standing, and drying.

IPC Classes  ?

• C22C 1/02 - Making non-ferrous alloys by melting
• B22D 1/00 - Treatment of fused masses in the ladle or the supply runners before casting
• C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
• C22C 23/02 - Alloys based on magnesium with aluminium as the next major constituent
• B22D 21/00 - Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedureSelection of compositions therefor
• B22D 29/04 - Handling or stripping castings or ingots
• B22D 27/00 - Treating the metal in the mould while it is molten or ductile
• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
• C22C 1/10 - Alloys containing non-metals
• B22D 7/00 - Casting ingots

Abstract

Provided is a method of forming a cup-shaped aluminum-magnesium-alloy article by rotary extrusion, including the following steps. (1) Blanking. (2) Performing rotary extrusion: placing a cylindrical billet into a concave die cavity, wherein a peripheral wall of the cavity of the concave die is provided with at least two symmetrical axial grooves; inserting a convex die into the concave die cavity, wherein an end of a working region of the convex die is provided with a groove of a trapezoidal cross section; subjecting the convex die to forward extrusion and heating, and simultaneously rotating and heating the concave die, wherein an integral torque is formed during the extrusion process of the convex die by using the cylindrical billet inside the groove having a trapezoidal cross section, and wherein a synchronized rotation with the concave die is achieved by using a metallic billet that flows into the axial groove. (3) Demolding.

IPC Classes  ?

• B21C 23/14 - Making other products
• B21C 25/02 - Dies
• B21C 25/08 - Dies or mandrels with section variable during extruding, e. g for making tapered workControlling variation
• B21C 29/04 - Cooling or heating extruded work or parts of the extrusion press of press heads, dies, or mandrels
• B21C 23/21 - Presses specially adapted for extruding metal

Abstract

A special-purpose die for shaping an aluminum-magnesium alloy by rotating extrusion is provided, including a male die and a female die, wherein a trapezoidally-sectioned groove is formed at an end portion of a working area of the male die, an inner portion of the male die is hollow, with the hollow inner portion having sections of equal area, a circumferential wall of a die cavity of the female die is provided with at least two symmetrical axial grooves, and a cavity is formed inside a clamping part of the female die. The present disclosure remarkably reduces the axial extrusion force such that the deformation of the formed workpiece is more uniform, which greatly improves the mechanical property of the formed workpiece.

IPC Classes  ?

• B21C 25/02 - Dies
• B21C 29/04 - Cooling or heating extruded work or parts of the extrusion press of press heads, dies, or mandrels
• B21C 23/00 - Extruding metalImpact extrusion
• B21C 29/00 - Cooling or heating extruded work or parts of the extrusion press
• B21C 23/08 - Making wire, rods or tubes
• B21C 25/04 - Mandrels
• B21C 23/20 - Making uncoated products by backward extrusion

Abstract

The invention discloses a Selective Laser Melting forming device for multiple metal powder materials. Technical solutions adopted are as follows: a collector container, a build cylinder and a feed container are provided on a lower portion of a process chamber; leveling oil cylinders for the substrate are mounted in the build cylinder; a recoater bracket in the process chamber is slidably mounted on a slide rail; a recoater is fixed on a lower portion of the recoater bracket; a compaction roller is simultaneously mounted on the recoater bracket; a stress sensor is provided under the compaction roller; an electron microscope for collecting the porosity of the spread powder and the product and a melting pool monitoring Charge Coupled Device camera; a laser scanning system, a directional heating laser system and an alarm device are provided on a top portion of the process chamber.

IPC Classes  ?

• B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
• B23K 26/03 - Observing, e.g. monitoring, the workpiece
• B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
• B23K 26/144 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor the fluid stream containing particles, e.g. powder
• B23K 26/342 - Build-up welding
• B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
• B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

Abstract

The present invention discloses a rotary extrusion producing method for producing an inner ring rib with a large aspect ratio formed of a hollow billet, which includes: combining, at an initial stage of rotary extrusion, two convex dies together and driving, by a slider on a press machine, left and right half convex dies to extrude a blank downward to form an initial profile of a transverse rib; dragging respectively, by left and right horizontal hydraulic cylinders, the left and right half convex dies to move in a radial direction, to form an initial cylindrical wall, so as to achieve a purpose of forming the transverse rib, once the blank is extruded downward by a certain depth, where a head of a mandrel is set to be at a certain conical degree, and a certain number of processed pits are distributed on an inner cavity of a concave die.

IPC Classes  ?

• B21C 23/20 - Making uncoated products by backward extrusion
• B21C 23/08 - Making wire, rods or tubes

Abstract

The present invention discloses a rotary extrusion producing mold for producing an inner ring rib with a large aspect ratio formed of a hollow billet, which consists of a concave die, a left half convex die, a right half convex die, a mandrel, a lower core support and an elastic supporting mechanism, the left and right half convex dies are fixed onto an upper template connected with a slider and a horizontal hydraulic cylinder, a left drive hydraulic cylinder and a right drive hydraulic cylinder are mounted at both ends of the upper template, respectively, the lower core support passes through a middle of the concave die, the elastic supporting mechanism is mounted at a bottom of the lower core support, a drive gear is mounted on a side face of the concave die, and the mandrel is disposed between the left and right half convex dies.

IPC Classes  ?

• B21C 25/08 - Dies or mandrels with section variable during extruding, e. g for making tapered workControlling variation
• B21C 23/20 - Making uncoated products by backward extrusion
• B21C 25/02 - Dies
• B21C 25/04 - Mandrels

Abstract

The present disclosure relates to the technical field of deep hole machining, particularly to a rear-mounted deep hole machining on-line detection and deviating correction device, which provide solution to the difficulty in observing the machining site and correcting the cutter deviation in deep hole machining. The device comprises a cutter bar provided with a plurality of iron blocks mounted uniformly in a circumferential direction, wherein each of the iron blocks is provided with a heating device in the interior thereof and a wear-resistant block mounted on the top thereof, wherein mounted on an end face of the other end of the cutter bar is a pyramid prism, wherein a laser transmitter and a photosensitive sensor are mounted in a height corresponding to the height range of the pyramid prism, wherein the incident beam emitted by the laser transmitter is oriented by a laser orientating block. The advantages of the disclosure lie in that the information of the position the deep hole cutter during deep hole machining process and whether the deep hole is skewed or not can be obtained in time, thereby facilitating a solution to the difficulty in detecting the workpiece deep hole straightness and on-line deviating correction, improving the position accuracy such as straightness of the deep hole and reducing the rejection rate of the workpiece.

IPC Classes  ?

• B23B 25/00 - Accessories or auxiliary equipment for turning-machines
• B23B 41/02 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring deep holesTrepanning, e.g. of gun or rifle barrels
• B23B 29/02 - Boring bars
• B23Q 15/14 - Control or regulation of the orientation of the tool with respect to the work
• G01S 17/42 - Simultaneous measurement of distance and other coordinates
• B23B 49/00 - Measuring or gauging equipment on boring machines for positioning or guiding the drillDevices for indicating failure of drills during boringCentring devices for holes to be bored

Abstract

The disclosure relates to a technical field of deep hole machining, particularly to a deep hole machining on-line deviating correction device based on laser detection, which solves the prior art problem of difficulty in the real-time, on-line detection and deviating correction in the process of deep hole machining. The device comprises a deep hole cutter and a cutter bar, and arranged on the cutter bar are a laser orientating block, a pyramid prism seat, the deep hole cutter and a metallic block with a heating device arranged therein. A beam emitted by a laser transmitter is orientated by the laser orientating block so as to be incident in parallel with the axis of the cutter bar, and then through a pyramid prism to form a return beam which reaches the photosensitive sensor. The advantages of the disclosure lie in that skewing of the deep hole cutter can be detected in time and skewing correction of the deep hole tool is achieved based on the heat expansion and cold contraction mechanism, and therefore the straightness and position accuracy during deep hole machining are improved.

IPC Classes  ?

• B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
• B23B 41/02 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring deep holesTrepanning, e.g. of gun or rifle barrels
• B23B 29/02 - Boring bars
• G01S 17/42 - Simultaneous measurement of distance and other coordinates

Abstract

The present invention relates to a method for preparing an aluminum-copper-iron quasicrystal and silicon carbide mixed reinforced aluminum matrix composite, where the aluminum-copper-iron quasicrystal and silicon carbide mixed reinforced aluminum matrix composite is prepared with an aluminum alloy serving as a matrix and with aluminum-copper-iron quasicrystal and silicon carbide serving as reinforcement agents via smelting in an intermediate-frequency induction melting furnace through the process of intermediate-frequency induction heating, vacuumizing, bottom blowing argon, and casting molding in view of low hardness and low tensile strength of aluminum matrix materials. The prepared aluminum-copper-iron quasicrystal and silicon carbide mixed reinforced aluminum matrix composite has a hardness of 80.3 HB which is improved by 50.64% and tensile strength of 285 Mpa which is improved by 60.42%, and corrosion resistance thereof is improved by 40%.

IPC Classes  ?

• C22F 1/04 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
• B22C 9/02 - Sand moulds or like moulds for shaped castings
• B22D 21/00 - Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedureSelection of compositions therefor
• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
• C22C 1/02 - Making non-ferrous alloys by melting
• C22C 1/06 - Making non-ferrous alloys with the use of special agents for refining or deoxidising
• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01N 3/40 - Investigating hardness or rebound hardness
• B22C 3/00 - Selection of compositions for coating the surfaces of moulds, cores, or patterns
• C22C 1/10 - Alloys containing non-metals
• C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
• C22C 1/00 - Making non-ferrous alloys
• C22C 45/08 - Amorphous alloys with aluminium as the major constituent

Abstract

A reinforced magnesium matrix composite includes a quasicrystal and alumina mixture particles reinforcement phase and a magnesium alloy matrix, where the weight ratio of the quasicrystal and alumina mixture particles reinforcement phase to the magnesium alloy matrix is (4-8) to 100; the magnesium alloy matrix including by weight 1000 parts of magnesium, 90 parts of aluminum, 10 parts of zinc, 1.5-5 parts of manganese, 0.5-1 part of silicon and 0.1-0.5 part of calcium; the quasicrystal and alumina mixture particles reinforcement phase including by weight 40 parts of magnesium, 50-60 parts of zinc, 5-10 parts of yttrium and 8-20 parts of nanometer alumina particles of which the diameter is 20-30 nm; and the quasicrystal and alumina mixture particles reinforcement phase having a size of 100-200 mesh.

IPC Classes  ?

• C22C 23/06 - Alloys based on magnesium with a rare earth metal as the next major constituent
• C22C 1/02 - Making non-ferrous alloys by melting
• C22C 23/02 - Alloys based on magnesium with aluminium as the next major constituent
• B22D 21/00 - Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedureSelection of compositions therefor
• B22D 29/04 - Handling or stripping castings or ingots
• B22D 27/00 - Treating the metal in the mould while it is molten or ductile
• B22D 1/00 - Treatment of fused masses in the ladle or the supply runners before casting
• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
• B22D 7/00 - Casting ingots