Abrégé

Disclosed is an interference protection device and method for a hydraulic support and a cutting part of a shearer. The device includes: a plurality of dust-proof cases evenly and fixedly provided on a surface of one side of a hauling part of the shearer that faces away from a coal wall, and a dust-proof housing fixed on the hydraulic support. A first ultrasonic transducer and a flash lamp are fixedly provided in each dust-proof case, and a second ultrasonic transducer, a receiver, and a data processing module are fixedly provided in the dust-proof housing. The data processing module is electrically connected to the second ultrasonic transducer and the receiver separately, the first ultrasonic transducers and the flash lamps are all electrically connected to an external single-chip microcomputer, and the data processing module is electrically connected to a hydraulic support control computer. The present invention obtains a distance from the shearer to the hydraulic support by calculation from a difference between time points at which the second ultrasonic transducer and the receiver on the hydraulic support respectively receive an ultrasonic signal and an optical signal, and thus timely controls a guard plate to retract, thereby achieving the advantages of low cost, high applicability and high reliability.

Classes IPC  ?

• E21D 23/12 - Commande, p. ex. en utilisant une télécommande
• B23D 33/00 - Accessoires des machines à cisailler ou des dispositifs de cisaillage
• E21F 17/18 - Adaptations particulières des dispositifs de signalisation ou d'alarme

Abrégé

A roadheader footage measurement method, relating to the technical field of footage measurement. According to the measurement method, a distance measurement apparatus (2) and a reflecting target (1) are provided, a laser beam is emitted from a laser sensor (21) to the reflecting target (1), and the laser beam which is reflected by the reflecting target (1) is received, and the time from emission of the laser beam to reception thereof is measured by means of a timer, so as to calculate the distance L from the laser sensor (21) to the reflecting target (1) in order to automatically measure the roadheader footage; and at the same time, a return-light quantity C is monitored, and whether the laser beam hits the target is determined according to the return-light quantity, so as to start a targeting process in good time. According to the roadheader footage measurement method, the roadheader footage is automatically measured by means of arranging the distance measurement apparatus (2) and the reflecting target (1), and manual measurement is replaced with automatic measurement, such that the measurement precision is high, and the labor intensity is reduced; and at the same time, whether the laser beam hits the target can be determined according to the return-light quantity measured by the laser sensor (21), so as to start a steering engine gimbal (23) according to requirements to perform targeting, thereby further improving the accuracy and integrity of distance measurement.

Classes IPC  ?

• E21D 9/00 - Tunnels ou galeries, avec ou sans revêtementsProcédés ou appareils pour leur exécutionTracé des tunnels ou des galeries

Abrégé

Disclosed is a method for automatically controlling the traction speed of a coal cutter on the basis of a coal wall caving degree, relating to the technical field of coal cutter control. The control method comprises: an image collection unit performing feature extraction on feature vectors, reflecting a coal wall caving degree, in an image to realize the online evaluation of the coal wall caving degree; generating a current control instruction for a coal cutter on the basis of an online evaluation result; and transmitting same to a machine-mounted control unit (6) of the coal cutter to realize the automatic adjustment of the traction speed of the coal cutter. The traction speed of a coal cutter is automatically adjusted on the basis of a coal wall caving degree; and when the coal wall caving degree is high, a coal output from a roller is reduced by means of reducing a traction speed, such that a sudden change of a load on a scraper conveyer caused by coal wall caving is relieved, thereby increasing the service life of a driving electric motor, reducing the volatility of a power grid in a mining area, and ensuring the production safety of a whole fully mechanized coal mining face.

Classes IPC  ?

• E21C 35/24 - Télécommande spécialement adaptée aux machines pratiquant des saignées ou libérant complètement la matière minérale

Abrégé

A hydraulic support monitoring a support pose in real time based on an inertia measurement unit (IMU) and a detection method thereof. In the hydraulic support, IMU sensors are separately mounted on a roof beam, a rear linkage, and a base, and an auxiliary support pose monitoring system is disposed. Each IMU sensor measures movement states of the roof beam, the rear linkage, and the base of the support in real time, and the support pose monitoring system processes the movement states to monitor a support pose of the hydraulic support in real time. Especially, it can be technically determined whether the hydraulic support is adequately lowered, moved or raised, thereby effectively reducing the labor intensity of workers and improving the working efficiency of the hydraulic support.

Classes IPC  ?

• E21D 15/00 - ÉtançonsCales
• E21D 15/51 - Parties constitutives ou détails des étançons spécialement adaptés aux étançons hydrauliques, pneumatiques ou hydropneumatiques, p. ex. aménagements de soupapes de sûreté
• E21D 23/04 - Caractéristiques structurelles de la construction de soutènements, p. ex. organes de liaison entre châssis adjacents ou séries d'étançonsMoyens pour empêcher un glissement latéral sur un sol incliné

Abrégé

A system and method for remotely locating a communication error support for hydraulic supports. The system includes a control panel, a support controller, a data converter, and two support drivers of the same type. Each support driver has two bus interfaces. The control panel transmits a control command to the data converter in a form of a WiFi signal. The data converter converts the WiFi signal into a message signal and transmits the message signal to the support controller. The support controller transmits the control command to the two support drivers, respectively. The support drivers transmit the command through CANH twisted pairs and CANL twisted pairs. When a bus for transmitting the command of a certain node has an error, the support controller calculates the fault node according to a formula and feeds back the fault node onto the control panel.

Classes IPC  ?

• E21D 23/12 - Commande, p. ex. en utilisant une télécommande
• H04L 12/40 - Réseaux à ligne bus
• E21D 23/14 - Commande, p. ex. en utilisant une télécommande réalisant un mouvement successif automatique des soutènements, p. ex. l'un après l'autre

Abrégé

Disclosed is an apparatus for protecting interference between a hydraulic support and a shearer cutting part. The apparatus comprises plurality of dustproof boxes uniformly fixedly arranged on the surface of the side of the traction part of a shearer facing away from a coal wall, and a dustproof case fixed on the hydraulic support. An ultrasonic transducer I and a flash lamp are fixed in each dustproof box. An ultrasonic transducer II, a receiver, and a data processing module are fixed in the dustproof case. The data processing module is electrically connected to the ultrasonic transducer II and the receiver, the ultrasonic transducer I and the flash lamp are electrically connected to an external single-chip microcomputer, and the data processing module is electrically connected to a hydraulic support control computer. The distance between the shearer and the hydraulic support is calculated according to the time difference between the ultrasonic signal and the optical signal respectively received by the ultrasonic transducer II and the receiver on the hydraulic support, thus controlling the folding of a guard plate in due time. The advantages such as low costs, high adaptability, and high reliability are provided. Also disclosed is a using method.

Classes IPC  ?

• E21F 17/18 - Adaptations particulières des dispositifs de signalisation ou d'alarme
• E21D 23/12 - Commande, p. ex. en utilisant une télécommande

Abrégé

Disclosed is a system for remotely positioning a hydraulic support having a communication error. The system comprises a control panel, a support controller, a data converter, and two support drivers of the same model; each support driver is provided with two bus interfaces; the control panel transmits a control command to the data converter in the form of a WiFi signal; the data converter converts a wireless signal into a message signal and transmits same to the support controller; the support controller transmits the control command to the two support drivers, separately, and the support drivers transmit the command by means of a CANH twisted pair and a CANL twisted pair; if a bus of a transmission command of a certain node has an error, the support controller calculates the node having a failure according to formula (I), and feeds the node back to an operating panel. By means of the system, the failure node can be precisely and quickly positioned, the work intensity of downhole workers is lowered, and the working efficiency of the hydraulic support is improved. Also disclosed is a method using the system.

Classes IPC  ?

• E21D 23/12 - Commande, p. ex. en utilisant une télécommande

Abrégé

Disclosed is a method for restoring a downhole image based on a reverse ray tracing technology, comprising the following steps: setting a downhole camera as a light source emission point, and emitting light rays to a downhole scene; recording all intersections between all light rays and a downhole object, and calculating an intersection, in the intersections, that is closest to a viewpoint; calculating directions of light rays newly generated after the light rays are reflected and refracted at the intersections; respectively tracing the newly generated light rays; recording light rays, from a strong light source emitted at the camera, irradiated on a viewing plane after being reflected or refracted for three times, and calculating light intensities of the light rays; converting the light intensities into pixel values by means of a CCD light sensing element of the camera; and eliminating, in an image finally presented in the viewing plane, the pixel values of the strong light emitted by the camera to obtain an image for which the effect of the strong light source is eliminated. The present invention can effectively eliminate the interference of a strong light source and restore a downhole image, thereby ensuring smooth downhole work and life safety of operators.

Classes IPC  ?

• H04N 5/217 - Circuits pour la suppression ou la diminution de perturbations, p.ex. moiré ou halo lors de la production des signaux d'image
• H04N 5/357 - Traitement du bruit, p.ex. détection, correction, réduction ou élimination du bruit

Abrégé

Disclosed are a hydraulic support frame monitoring a support posture in real-time based on an IMU and a detection method for the hydraulic support frame. The hydraulic support frame has IMU sensors mounted respectively on a top beam (7), a rear connecting rod (4), and a base (3), and is provided with a supplementary support posture monitoring system. Motion states of the top beam (7), the rear connecting rod (4), and the base (3) of the support frame are measured in real-time by the multiple IMU sensors and processed by the support posture monitoring system so as to monitor the support posture of the hydraulic support frame in real-time, specifically, whether frame lowering, frame moving, and lifting/lowering operations with respect to the hydraulic support frame are carried out correctly, thus allowing a determination to be made on a technical level, effectively reducing the labor intensity for workers, and increasing the work efficiency of the hydraulic support frame.

Classes IPC  ?

• E21D 23/04 - Caractéristiques structurelles de la construction de soutènements, p. ex. organes de liaison entre châssis adjacents ou séries d'étançonsMoyens pour empêcher un glissement latéral sur un sol incliné
• E21D 15/51 - Parties constitutives ou détails des étançons spécialement adaptés aux étançons hydrauliques, pneumatiques ou hydropneumatiques, p. ex. aménagements de soupapes de sûreté

Abrégé

Disclosed are a pose sensing device for a hydraulic support push push rod in a fully mechanized mining face, and a mechanism and method for the hydraulic support push push rod in the fully mechanized mining face. The sensing device comprises a plurality of hydraulic support bases (1, 3), and a push push rod (5) of each hydraulic support base (1, 3) is connected to a middle slot (7) of one scraper conveyor. Left and right sides of each push push rod (5) are provided with a left side pose sensing unit and a right side pose sensing unit for sensing the poses of the push push rods (5) in real time respectively. A central signal processing unit senses a degree of offset of the push push rods (5) according to a displacement fed back by the left side pose sensing unit and a displacement fed back by the right side pose sensing unit, and adjusts same by means of an actuator (14). By means of sensing in real time the pose of the push push rods (5) and adjusting same in real time, it is ensured that the push push rods (5) are in a middle position. The mechanism is simple, the response is fast, the accuracy is high, and the performance-price ratio is high.

Classes IPC  ?

• E21D 23/18 - Caractéristiques hydrauliques ou pneumatiques, p. ex. circuits, disposition ou adaptation de soupapes, dispositifs de mise en place ou de retrait des mécanismes d'avance
• E21D 23/26 - Commande hydraulique ou pneumatique

Abrégé

An automatic straightening device includes a fully-mechanized coal mining working face, which includes a plurality of middle troughs, and each middle trough is connected to a push-pull rod of one hydraulic support. The fully-mechanized coal mining working face is provided with the automatic straightening device. The automatic straightening device includes a flexible element rope, the tensile and compressive force sensors, and a signal processing device. Each middle trough is provided with two tensile and compressive force sensors; one end of the flexible element rope is connected to a rope extend-retract control device, and the other end of the flexible element rope sequentially passes through lifting rings to be connected to the tensile and compressive force sensors and is fixed to a positioning force bearing bolt on the outermost side.

Classes IPC  ?

• B65G 23/24 - Transmissions entre moteur d'entraînement et éléments en prise sur la courroie ou la chaîne
• E21F 13/06 - Transport spécialement adapté aux conditions du fond au front de taille ou à proximité du front de taille
• B65G 23/44 - Dispositifs de tension des courroies ou des chaînes

Abrégé

Disclosed are a hydraulic support voice control system and method based on vocal cord vibration measurement. A vibration measurement unit converts a vocal cord vibration of an operator into a corresponding electrical signal; a signal amplification unit amplifies the signal; then, the signal is converted by a vibration signal A/D conversion unit and is then transmitted to a signal processing unit for analysis processing to obtain a voice control command corresponding to the vocal cord vibration signal; then, the voice control command and a standard voice control command are subjected to comparison and matching to identify the vocal cords of the operator, and a wireless signal transceiving unit sends a control signal corresponding to the vocal cords to a hydraulic support controller wireless transceiving unit; and the hydraulic support controller wireless transceiving unit feeds back state parameters of a hydraulic support.

Classes IPC  ?

• E21D 23/14 - Commande, p. ex. en utilisant une télécommande réalisant un mouvement successif automatique des soutènements, p. ex. l'un après l'autre

Abrégé

A pull-press force sensor-based automatic straightening apparatus and method for a scraper conveyor on a fully mechanized coal mining face. The automatic straightening apparatus comprises a fully mechanized coal mining working face; the fully mechanized coal mining working face comprises several middle troughs; each middle trough is connected to a pressing rod of a hydraulic support. The fully mechanized coal mining working face is equipped with the automatic straightening apparatus. The automatic straightening apparatus comprises a flexible element rope, pull-press force sensors, and a signal processing unit; each middle trough is equipped with two pull-press force sensors; one end of the flexible element rope is connected to a rope extension/contraction control means, and the other end thereof is connected to the pull-press force sensors in sequence by means of hoisting rings. The positions of the middle troughs are adjusted according to the result of the signal processing unit to make pull-press force values in all groups be equal to zero, so that automatic straightening of a scraper conveyor body is completed. The apparatus features high precision and high cost performance, can overcome the harsh environment in a coal mine, and has a long service life.

Classes IPC  ?

• B65G 23/44 - Dispositifs de tension des courroies ou des chaînes