In a wheel loader 1 with a housing box 3, the housing box 3 is formed into a box shape including a bottom surface portion 301, a top surface portion 302, a first side surface portion 303 connecting the bottom surface portion 301 and the top surface portion 302, and a second side surface portion 304 connecting the bottom surface portion 301, the top surface portion 302, and the first side surface portion 303, each of the top surface portion 302, the first side surface portion 303, and the second side surface portion consists of the main body 31 and the cover 32, the top surface portion 302 includes an inclined region 302B inclined downward from a horizontal region 302A toward the second side surface portion 304, and a draw latch 33 for locking the cover 32 to the main body 31 is provided on the inclined region 302B.
This work machine comprises a plurality of hydraulic actuators, a hydraulic pump for discharging hydraulic oil, a pressure accumulation device for accumulating the hydraulic oil, operation levers for receiving operation inputs applied to the respective hydraulic actuators by an operator, and a control device for controlling the pressure accumulation device on the basis of the pressure of the pressure accumulation device. The control device, on the basis of the operation amounts of the operation levers, calculates, for each of the plurality of hydraulic actuators, a target assist flow rate that is a flow rate for assisting the operation of each of the hydraulic actuators as an addition to the discharge flow rate of the hydraulic pump, and supplies the hydraulic oil at the calculated target assist flow rate from the pressure accumulation device to each of the hydraulic actuators.
This transport vehicle comprises: an engine; a generator driven by the engine to generate power; a travel motor driven with the power generated by the generator; a cab provided with an accelerator pedal for adjusting the rotational speed of the engine through an operation by an operator; and a controller for controlling the engine and the travel motor. The transport vehicle has a work mode changeover switch capable of switching between a plurality of work modes having different engine outputs. The controller controls the engine or the travel motor by changing operation parameters of the engine and the travel motor corresponding to the amount of depression of the accelerator pedal, in accordance with the work mode set by the work mode changeover switch.
B60L 50/16 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
B60W 10/06 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
B60W 10/08 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
F02D 29/00 - Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
F02D 45/00 - Electrical control not provided for in groups
It is an object of the present invention to provide a drive system for dump trucks that is capable of reducing the capacity of a converter that excites a two-winding induced generator and of performing output control according to the converter capacity. To achieve the object, the drive system includes an induced generator having a primary winding including a main winding and a sub-winding, a rectifier for converting an AC voltage generated across the main winding into a DC voltage, a propulsive machinery side load connected to the rectifier, a converter connected to the sub-winding for exciting a secondary winding of the induced generator and converting an AC voltage generated across the sub-winding into a DC voltage, an accessory side load connected to the converter, and a controller for controlling the converter, in which the controller controls a DC voltage of the accessory side load according to electric power required by the accessory side load and controls a DC voltage of the propulsive machinery side load according to electric power required by the propulsive machinery side load and a converter capacity that represents a current capacity of the converter.
B60L 50/13 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines using AC generators and AC motors
B60L 7/06 - Dynamic electric resistor braking for vehicles propelled by AC motors
H02P 21/22 - Current control, e.g. using a current control loop
H02P 101/45 - Special adaptation of control arrangements for generators for motor vehicles, e.g. car alternators
A transportation vehicle includes: a cooling fan that is driven by a hydraulic motor; a heat exchanger that is disposed in a front portion of a vehicle body; a fan control valve that controls a flow of a hydraulic operating fluid supplied to the hydraulic motor; a cylinder control valve that controls a flow of the hydraulic operating fluid supplied to a hydraulic cylinder; and a controller. The fan control valve and the cylinder control valve are connected in tandem to a center bypass line. The fan control valve has a neutral position that makes a first hydraulic pump and the cylinder control valve communicate with each other and makes a suction port and a delivery port of the hydraulic motor and a hydraulic operating fluid tank communicate with each other, and a rotation position that makes the first hydraulic pump and the suction port of the hydraulic motor communicate with each other and makes the delivery port of the hydraulic motor and the hydraulic operating fluid tank communicate with each other.
B62D 5/07 - Supply of pressurised fluid for steering also supplying other consumers
B60K 11/04 - Arrangement or mounting of radiators, radiator shutters, or radiator blinds
B60P 1/16 - Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load supporting or containing element actuated by fluid-operated mechanisms
This transport vehicle recognition system: includes an information processing device; recognizes the position and the posture of a transport vehicle by using point cloud data on the periphery of a work machine; and outputs a recognition result to a control device of the work machine. The information processing device acquires the point cloud data from a measurement device and also acquires information regarding the posture of the work machine from a posture detection device of the work machine to thereby perform recognition processing of the transport vehicle. The information processing device builds a recognition model for the transport vehicle on the basis of the point cloud data and combination data in which the position and the posture of the transport vehicle are associated at the time the point cloud data has been acquired. The information processing device: when the recognition model has not been built, recognizes the position and the posture of the transport vehicle on the basis of the point cloud data and the posture of the work machine; and when the recognition model has been built, recognizes the position and the posture of the transport vehicle on the basis of the recognition model and the point cloud data.
Provided is a work machine management system that comprises a processing device for evaluating work performed by a work machine. The processing device: acquires control software for motion control of the work machine and acquires operation data including machine body data and work data of the work machine; calculates, on the basis of the operation data, an evaluation value that pertains to work performed by the work machine and that is based on an evaluation index used for work evaluation of the work machine; and performs simulation for adjusting a parameter for the control software of the work machine based on the evaluation value, and outputs the simulation outcome. As a result, control software of a work machine is easily improved regarding a prescribed evaluation index.
A controller of this work machine sets a constraint condition in model prediction control for preventing a work device from entering an entry prevention area, and performs model prediction control for calculating a target operation speed of a hydraulic actuator for a predetermined period of time from the present time so that the deviation between the coordinates of a work tool and the target coordinates of the work tool is reduced while satisfying the constraint condition. The controller calculates an operation speed of the hydraulic actuator on the basis of an attitude of the work device detected by an attitude detection device, controls the hydraulic actuator so that the operation speed of the hydraulic actuator matches the target operation speed, determines whether the position of a control point of the work device deviates from the constraint condition, and executes operation prohibition control for prohibiting or stopping the operation of the work device when it is determined that the position of the control point of the work device deviates from the constraint condition.
An exhaust gas aftertreatment device (14) for treating exhaust gas discharged from an engine (10) is provided with a first processing unit (15) connected to the exhaust gas outflow side of an exhaust pipe (11), a second processing unit (16) connected to the exhaust gas outflow side of the first processing unit (15), and a third processing unit (17) connected to the exhaust gas outflow side of the second processing unit (16). A tail pipe (20) is connected to the exhaust gas outflow side of the third processing unit (17), the first processing unit (15) and the second processing unit (16) are arranged in the vertical direction, and the third processing unit (17) is disposed at a height position between the first processing unit (15) and the second processing unit (16).
E02F 9/00 - Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups
B60K 13/04 - Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
F01N 3/02 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
F01P 1/06 - Arrangements for cooling other engine or machine parts
The purpose of the present invention is to accurately determine a road surface state, such as the slipperiness of a road surface, from a vehicle state during travel, and to achieve a traveling speed that ensures both the safety of a transport vehicle and work efficiency. A control device of this transport vehicle comprises: a μ calculation unit that calculates a friction coefficient of a road surface on the basis of a measurement result from a sensor; an ω calculation unit that calculates a slip ratio of a wheel with respect to the road surface on the basis of the measurement result of the sensor; a parameter estimation unit that estimates a parameter indicating a road surface state; a maximum friction estimation unit that estimates a maximum friction coefficient of the road surface; and a speed limitation unit that calculates an upper limit speed for the transport vehicle corresponding to the maximum friction coefficient and limits a target speed. The parameter estimation unit estimates a parameter indicating the road surface state in a linear region in which the relationship between the friction coefficient and the slip ratio is linear. The maximum friction estimation unit estimates the maximum friction coefficient on the basis of the parameter in the linear region.
The purpose of the present invention is to secure the attitude stability of a work machine by considering the influence of a cliff-like topography on the attitude stability of the work machine. This work machine comprises: an attitude detection device that detects the inclination angle of the work machine and the turning angle of an upper turning body; a surrounding detection device that detects the surrounding terrain; and a control device that controls the work machine. The control device has: a cliff determination unit that determines whether there is a bench edge around the work machine on the basis of the detection result from the surrounding detection device; a center-of-gravity calculation unit that calculates the center-of-gravity position of the work machine on the basis of the detection result from the attitude detection device; and a stabilization assistance unit that assists the attitude stabilization of the work machine. When the distance between the bench edge and the center-of-gravity position is equal to or less than a threshold value, the stabilization assistance unit causes a notification device to issue an alarm or restricts the operation of an operator in which the center-of-gravity position approaches the bench edge, as assistance for attitude stabilization.
The purpose of the present invention is to allow an operator to easily ascertain a positional relationship between a bucket and a construction target surface even when the inclination angle of the construction target surface suddenly changes. This display system includes a control device that supports operation of a work machine, and a display device. The control device comprises: a target surface storage unit that stores the position and shape of a construction target surface; a bucket position calculation unit that calculates the position of the bucket; a guidance calculation unit that generates a guidance image representing the positional relationship between the bucket and the construction target surface; and an auxiliary calculation unit that generates an auxiliary image that represents a virtual surface intersecting the construction target surface at a proximity point on the construction target surface and parallel to the bottom surface of the bucket. The display device displays the auxiliary image superimposed on the guidance image.
A hydraulic shovel according to the present invention comprises a vehicle body, a display device, a controller that causes the display device to display reference lines that give a reference for the distance to the vehicle body on video of the surroundings of the vehicle body, and an input device that inputs instructions to the controller. The reference lines that the controller causes to be displayed on the surroundings video include a fixed reference line that has a fixed rendering position on the surroundings video and a changeable-position reference line that has a rendering position on the surroundings video that can be changed on the basis of input from the input device. The reference lines rendered on the surroundings video make it possible to allow an operator to easily ascertain the positions of the reference lines while helping the operator to appropriately recognize the distance between a work machine and objects in the surroundings of the work machine.
B60R 1/27 - Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles for viewing an area outside the vehicle, e.g. the exterior of the vehicle with a predetermined field of view providing all-round vision, e.g. using omnidirectional cameras
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Provided is an electric work machine that is characterized by comprising: a fuel cell 1; a secondary cell 5; a driving motor 2 driven by electric power supplied from the fuel cell 1 or the secondary cell 5; an electric fan 16 for assisting in the warming-up of the fuel cell 1; and a controller 9 for controlling the electric fan 16, wherein the controller 9 drives the electric fan 16 such that surplus power generated by the fuel cell 1 is consumed when warming up the fuel cell 1 during startup. This configuration makes it is possible to provide an electric work machine capable of consuming surplus power even when surplus power during warm-up of the fuel cell cannot be charged to the secondary cell.
B60L 58/40 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
B60K 1/00 - Arrangement or mounting of electrical propulsion units
B60K 8/00 - Arrangement or mounting of propulsion units not provided for in one of main groups
B60L 50/75 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
B60L 58/34 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by heating
The present invention prevents operation of a hydraulic actuator that is not intended by an operator when carrying out calibration of a flow rate control valve. A hydraulic drive system according to the present invention comprises a first valve (5a) provided between a hydraulic pump and a hydraulic actuator, a second valve (5b) provided between the hydraulic actuator and the first valve, a control device, a pressure sensor for detecting the pressure of an oil passage, and an input device. When a signal requesting calibration is inputted by an input device, a control device sets a valve that is to be calibrated to a closed state, and, after the oil passage is kept at a prescribed pressure while a valve that is not to be calibrated is in an open state, sets the valve that is not to be calibrated to the closed state, increments an opening degree command value for the valve that is to be calibrated and sets said valve to the open state, records an opening degree command value from when the amount of change in pressure in the oil passage detected by the pressure sensor is above a prescribed value, and controls the valve that is to be calibrated, said control being performed on the basis of the recorded opening degree command value.
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
A bucket lifting/closing device (11) of a deep excavator (1) comprises: a lifting cylinder (12); a first lifting/lowering sheave (14) and a first opening/closing sheave (15); a second lifting/lowering sheave (17) and a second opening/closing sheave (20); an opening/closing cylinder (18) that opens and closes a clamshell bucket (10); a lifting/lowering rope (24); and an opening/closing rope (25). The stroke length of the opening/closing cylinder (18) is set to be equal to or greater than a value obtained by adding a stroke length necessary for removing the slack in the opening/closing rope (25) generated when the clamshell bucket (10) lands, to a stroke length necessary for opening/closing the clamshell bucket (10), and an opening/closing cylinder relief valve (45) is provided to relieve an excess pressure in the opening/closing cylinder (18) when the weight from the clamshell bucket (10) acts on the opening/closing rope (25).
E02F 3/47 - DredgersSoil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes with grab buckets
The present invention provides a work machine that carries out control such that the cutting edge line of a bucket is parallel or nearly parallel to a target construction surface, in which an improvement in the accuracy of said control can be attained. An excavator comprises: a bucket; a tilt frame connected to an arm so as to allow rotation about a first axis and supporting the bucket so as to allow rotation about a second axis; a tilt cylinder that rotates the bucket about the second axis; and a control device that controls the tilt cylinder such that a cutting edge line of the bucket is parallel or nearly parallel to a target construction surface. The control device creates a virtual plane bounded by a cutting edge line including a first cutting edge point and a second cutting edge point, a target work line constituting the target construction surface, a first straight line passing through the first cutting edge point and perpendicular to the target work line, and a second straight line passing through the second cutting edge point and perpendicular to the target work line, and controls the tilt cylinder such that the area of the virtual plane becomes smaller.
In the present invention, a controller: calculates a plurality of pressure estimation values which are estimated values of measurement target pressures of a plurality of pressure sensors; determines whether or not the plurality of pressure sensors have failed; and, when one of the plurality of pressure sensors is determined to have failed, calculates a flow rate control valve target opening area by using, instead of the measurement value of said one pressure sensor, a pressure estimation value corresponding to said one pressure sensor among the plurality of pressure estimation values.
F15B 11/08 - Servomotor systems without provision for follow-up action with only one servomotor
F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
Provided is a work machine capable of increasing the speed of a hydraulic actuator while suppressing the flow rate of a hydraulic oil supplied from a regeneration device to the hydraulic actuator. A controller in the work machine measures the operation amount of an operation device with respect to a predetermined hydraulic actuator, determines whether a predetermined movable member is in a power running state or a self-weight falling state, and outputs, when the predetermined movable member is determined to be in the power running state, a control signal to an assist control valve so as to increase the opening amount of the assist control valve as the operation amount increases and to increase the opening amount of the assist control valve as the pressure detected by a first pressure detector decreases.
Provided is a work machine that comprises a vehicle body that has an operation chamber, a first notification device that is provided inside the operation chamber, a second notification device that is provided outside the operation chamber, an input device that sets a notification level for the second notification device, and a control device that controls the first notification device and the second notification device. The control device changes a notification level for the first notification device in accordance with the notification level for the second notification device set by the input device. The present invention thereby makes it possible to set the mode of notifications directed toward surrounding workers in accordance with circumstances and to direct appropriate notifications that correspond to the notifications directed toward the surrounding workers toward an operator in the operation chamber.
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
A hydraulic shovel (1) comprises a closed circuit pump (29), a hydraulic actuator (16), a hydraulic oil tank (61), an air vent pipe (71), a first circuit switching valve (72), a second circuit switching valve (73), and a charge relief valve (70). The air vent pipe (71) is connected to the hydraulic oil tank (61) via the charge relief valve (70). The first circuit switching valve (72), the second circuit switching valve (73), and the charge relief valve (70) are attached to one manifold block (38) in which the air vent pipe (71) is formed. The first circuit switching valve (72) and the second circuit switching valve (73) are disposed below the charge relief valve (70).
This work machine comprises: a regeneration valve that controls a regeneration flow rate, which is the flow rate of hydraulic oil flowing from a bottom chamber of a hydraulic cylinder to a pressure accumulation device; a boost valve that controls a boost flow rate, which is the flow rate of the hydraulic oil flowing from the bottom chamber to a rod chamber; a discharge valve that controls a return flow rate, which is the flow rate of hydraulic oil flowing from the bottom chamber to a tank; and a control device. The control device calculates a target bottom outflow flow rate and a target boost flow rate on the basis of the operation amount detected by a cylinder operation amount sensor, controls the boost valve so that the boost flow rate gradually increases with the passage of time and becomes equal to the target boost flow rate, and controls the regeneration valve or the regeneration valve and the discharge valve so that the total of the regeneration flow rate, the boost flow rate, and the return flow rate becomes equal to the target bottom outflow flow rate.
This dump truck is provided with: a vehicle body and wheels; a cargo bed which is supported on the vehicle body so as to be capable of rising and falling and onto which cargo is loaded; a suspension cylinder provided between the vehicle body and the wheels; a pressure sensor that measures a pressure of the suspension cylinder; an inclination angle sensor that measures an inclination of the vehicle body; an acceleration sensor that measures an acceleration acting on the vehicle body; a steering angle sensor that detects a steering angle of the vehicle body; and a controller that calculates a payload of the cargo bed. The controller calculates the payload on the basis of a measurement value of the pressure sensor, a measurement value of the inclination angle sensor, a measurement value of the acceleration sensor, and a measurement value of the steering angle sensor.
G01G 19/10 - Weighing apparatus or methods adapted for special purposes not provided for in groups for incorporation in vehicles having fluid weight-sensitive devices
G01G 23/01 - Testing or calibrating of weighing apparatus
This mine management device comprises: a storage device in which alert data and maintenance data of a mining machine are stored; and an information processing device that collects alert data and maintenance data to record in the storage device, while processing the collected data to output to a terminal device. The information processing device: links the alert data to the maintenance data so that all alerts issued during an operation period of the mining machine before maintenance work are associated with respective maintenance works of the mining machine; calculates a coupling degree that is an index indicating a degree of connection between an alert of the mining machine and a maintenance work using the alert data and maintenance data being linked; and causes the terminal device to display an alert of the mining machine as alert information on the basis of the coupling degree of the calculation result.
This electric construction machine 1 has a lower travel body 2 that includes a right travel device 21 and a left travel device 22 that are provided as a right/left pair and move forward/backward independently of each other. The electric construction machine 1 is driven by an external power supply that is connected by a cable 8. The electric construction machine 1 has: a cable reel device 6 that is provided to a rear end part that is between the right travel device 21 and the left travel device 22 of the lower travel body 2, accommodates the cable 8 in a wound state, winds the cable 8 up by forward rotation, and feeds the cable 8 out by backward rotation; and a control device 14 that controls the rotation direction of the cable reel device 6 in accordance with the movement state of the lower travel body 2.
An electric dump truck (1) is provided with: a control panel heat exchanger (13) that is provided in a control panel (12) and that cools an electric component by means of cooling air flowing from an inlet (12C) to an outlet (12D) of the control panel (12); and a blower (14) that sucks air in the control panel (12) from a suction port (14B) connected to the outlet (12D) and discharges the air from the discharge port (14C), thereby causing cooling air to flow in from the inlet (12C) and supplying the cooling air to the control panel heat exchanger (13); a first exhaust duct (16) and a second exhaust duct (17) connected to the discharge port (14C) of the blower (14); an oil cooler (18) for cooling hydraulic oil discharged from a hydraulic pump (7); and a capacitor (21) for cooling refrigerant of an air conditioner. The oil cooler (18) is disposed inside the first exhaust duct (16) so as to be surrounded by the first exhaust duct (16), and the capacitor (21) is disposed inside the second exhaust duct (17) so as to be surrounded by the second exhaust duct (17).
This work machine comprises: a prime mover; a hydraulic pump; a hydraulic actuator; a pressure accumulation device; an assist flow rate control valve for controlling the flow rate of hydraulic oil supplied from the pressure accumulation device to the hydraulic actuator; an operation device; an operation amount sensor; a pressure accumulation sensor; and a control device. The control device calculates the target flow rate of the hydraulic oil supplied to the hydraulic actuator on the basis of the operation amount, calculates an assist flow rate that is the flow rate of the hydraulic oil supplied from the pressure accumulation device to the hydraulic actuator through the assist flow rate control valve on the basis of the amount of change per unit time of the pressure detected by the pressure accumulation sensor, calculates the target discharge flow rate of the hydraulic pump by subtracting the assist flow rate from the target flow rate, and controls the rotation speed of the prime mover and/or the volume of the hydraulic pump so that the flow rate of the hydraulic oil discharged from the hydraulic pump becomes equal to the target discharge flow rate.
The purpose of the present invention is to enable a work device to perform work suitably and efficiently regardless of the operation state of the work device and even when a hydraulic cylinder of the work device is in an overload state. This work machine comprises: a boom cylinder and an arm cylinder; a hydraulic pump; a boom-direction control valve and an arm-direction control valve; and a first communication pipe that connects a bottom-side oil chamber of the boom cylinder, which is an extension-side oil chamber when the boom cylinder is extended by an excavation operation, to a bottom-side oil chamber of the arm cylinder, which is an extension-side oil chamber when the arm cylinder is extended by the excavation operation.
F15B 11/20 - Servomotor systems without provision for follow-up action with two or more servomotors controlling several interacting or sequentially-operating members
F15B 11/028 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force
Provided is a work machine capable of quickly performing excavation along a target excavation surface while causing a work tool having a three-axis rotation degree of freedom to directly face the target excavation surface. A control device comprises: a work point coordinate calculation unit for calculating the coordinates of a plurality of work points set on the work tool; a target point coordinate calculation unit for calculating the coordinates of a plurality of target points respectively corresponding to the plurality of work points; a work point deviation calculation unit for obtaining each deviation between the coordinates of the plurality of work points and the coordinates of the plurality of target points; a work point speed vector calculation unit for calculating each speed vector of the plurality of work points such that the total of the deviations is reduced; and an actuator target speed calculation unit for calculating each target speed of a plurality of actuators on the basis of each speed vector.
Provided is a work machine comprising a work tool actuator for driving a work tool attached to a work device, an operation device for operating the work device, an orientation sensor for detecting the orientation of the work device or the like, and a controller for controlling the work device so that the work tool does not excavate beyond a construction target surface on the basis of signals from the operation device and the posture sensor. The work tool actuator includes first/second actuators for operating the work tool in different directions. The controller calculates parallelism between the operation direction of the work tool and the construction target surface. When the parallelism is less than a preset threshold value the controller drives the first actuator to cause the work tool to face the construction target surface, and when the parallelism is equal to or greater than the threshold value, the controller restricts the work tool from being operated along the construction target surface by the first actuator and outputs a command signal for driving the second actuator.
This work machine, which includes actuators for respectively driving an upper turning body and a work device and a driving device for driving the actuators on the basis of operation command values calculated by a control device, sets a first construction target surface, sets a second construction target surface on the first construction target surface and above or in front of the first construction target surface on the basis of the current position and required operation direction of a bucket, and calculates and outputs operation command values so that the bucket is positioned on the second construction target surface and above or in front of the second construction target surface, the operation command values being calculated on the basis of orientation information about the work device measured by an orientation measurement device. Accordingly, operations of a work front in the vicinity of the boundary of the construction target surfaces can be carried out smoothly as intended by an operator, and greater operability can be achieved.
The present invention comprises an additional control valve that connects a tank-side oil passage to each of a bottom-side oil passage via which the bottom side of a hydraulic cylinder for driving a work device is connected to a main control valve and a rod-side oil passage via which the rod side of the hydraulic cylinder is connected to the main control valve. The additional control valve is provided with: a variable relief valve that is provided between the rod-side oil passage and the tank-side oil passage, the variable relief valve performing control so that the pressure of the rod-side oil passage is equal to or less than a predetermined target pressure; and a check valve that allows only the flow of pressure oil from the tank-side oil passage to the bottom-side oil passage. When switched to a float mode in which work carried out using the dead weight of the work device is performed, the additional control valve cuts off a meter-in control valve of the main control valve, sets the target pressure of the variable relief valve to the minimum value of a predetermined pressure range, and discharges the pressure oil in the rod-side oil passage to a pressure oil tank. This makes it possible to improve operability during float work while suppressing any worsening of control performance and pressure loss.
A hydraulic shovel comprises: a hydraulic pump; a pump regulator; a hydraulic cylinder supplied with hydraulic oil discharged from the hydraulic pump; an accumulator for storing the hydraulic oil discharged from the hydraulic pump; a control valve for controlling the flow rate of the hydraulic oil supplied from the accumulator to the hydraulic cylinder; a pressure sensor for detecting a pump load which is a load of the hydraulic pump; and a control device to which a signal from the pressure sensor is input, and which controls the pump regulator and the control valve. The control device controls the control valve so that the hydraulic oil supplied from the accumulator to the hydraulic cylinder increases as the pump load increases, and controls the pump regulator so that the flow rate of the hydraulic oil discharged from the hydraulic pump decreases as the hydraulic oil supplied from the accumulator to the hydraulic cylinder increases.
F15B 11/00 - Servomotor systems without provision for follow-up action
F15B 11/02 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
F15B 11/028 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force
In a dump truck (1) in which a cab (7) is disposed on a deck (5) of a vehicle body frame (2) and an engine (9) is mounted below the deck (5), maintenance steps (10l, 10r) that serve as standing positions for workers are provided on both left and right sides of the engine (9). Hatches (11l, 11r) are formed as openings in positions directly above the maintenance steps (10l, 10r) on the deck (5), and the hatches are provided with hatch covers (13l, 13r) that can be opened and closed. Ladders (15l, 15r) that allow the workers to ascend and descend are installed between the hatches (11l, 11r) and the maintenance steps (10l, 10r).
B60P 1/04 - Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load supporting or containing element
B60R 3/00 - Arrangements of steps, e.g. running-boards
This object recognition system comprises: a camera that captures an image of a work site; a control device that accepts input of the image acquired by the camera and recognizes a recognition target in the image using an object recognition model trained by machine learning; and a learning device that stores learning images captured at the work site and generates the object recognition model on the basis of the learning images. The control device uses the object recognition model, transmitted from the learning device, as a new object recognition model. The learning device additionally stores imaging position information of the learning images, generates imaging position distribution data indicating the distribution of the imaging positions of the learning images used to generate the object recognition model, on the basis of the imaging position information of the learning images used to generate the object recognition model, among the imaging position information, and displays the imaging position distribution data on a monitor.
When switching control is performed, in which a power transmission path of a transmission is switched from an HMT to a direct connection mechanism, a shift control device of a work vehicle performs pump volume reduction control for reducing the pump volume of an HST hydraulic pump of the HMT from maximum volume to zero while a lock-up clutch of the direct connection mechanism is kept in a pressed state. Pump volume reduction control reduces the pump volume of the HST hydraulic pump in at least two stages and is performed such that the rate of reduction in pump volume in a second stage of pump volume reduction control is lower than the rate of reduction in pump volume in a first stage, the second stage following the first stage.
This system for calibrating a construction machine comprises: a reference axis generator 201 for setting a reference axis 230 comprising a vertical axis or a horizontal axis on movable parts 111-113; an external measurement device 301 for measuring the relative position between the reference axis 230 and a mark 200 provided on the movable parts 111-113; and a calibration device 401 for calculating a calibration value of an attachment angle parameter 251 on the basis of positional relationships among the reference axis 230, the mark 200, and straight lines preset on the movable parts 111-113. Accordingly, the work of calibrating a parameter indicating the attachment angle of an angle sensor installed on a work machine is easily performed.
G01B 21/22 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapersMeasuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for testing the alignment of axes
The work machine comprises a gateway device for communicating with a control device and a cutoff warning device. When executing an ending process for ending an operating state of the control device, the control device outputs, to the gateway device, a control end notice time, which is the advance-notice end time by the ending process. The gateway device calculates a gateway end notice time for ending the operation of the gateway device on the basis of the control end notice time received from the control device, and outputs the gateway end notice time to the cutoff warning device. The cutoff warning device issues a warning for urging prohibition of use of the cutoff switch, until the gateway end notice time received from the gateway device.
Provided is a work machine that improves the fuel economy of the work machine while suppressing reduction in productivity at a work site. The work machine comprises: a work device that operates by a hydraulic actuator; a variable displacement hydraulic pump that supplies hydraulic oil to the hydraulic actuator; and a controller that controls pump output of the hydraulic pump. The work machine sequentially performs loading work on a first transport vehicle that stops at a loading site and a second transport vehicle that arrives at the loading site after the first transport vehicle. The controller predicts a predicted arrival time that is a time until the second transport vehicle arrives at the loading site during work on the first transport vehicle, and executes a pump output control process for reducing the pump output if the predicted arrival time is later than a predetermined target arrival time.
Provided is a work machine capable of appropriately measuring a wear amount of a slew bearing. The work machine comprises: a lower traveling body; an upper turning body supported so as to be rotatable with respect to the lower traveling body; and a slew bearing provided between the upper turning body and the lower traveling body. The slew bearing comprises an inner ring fixed to the lower traveling body, an outer ring fixed to the upper turning body, and a plurality of rolling bodies arranged between the inner ring and the outer ring and rolling as the outer ring rotates with respect to the inner ring. The work machine comprises: a part to be detected that protrudes radially outward from the outer peripheral surface of the inner ring and is continuous in the circumferential direction; a distance measurement sensor that is fixed to the outer ring at a position facing the part to be detected in the extension direction of the rotation center axis of the upper turning body and measures the distance to the part to be detected; and scraping members that are fixed to the outer ring, each at a position different from the distance measurement sensor in the circumferential direction of the slew bearing, the scraping members scraping foreign matter on the measurement surface of the part to be detected facing the distance measurement sensor. The scraping members are disposed on both sides of the distance measurement sensor in the circumferential direction of the slew bearing.
12 - Land, air and water vehicles; parts of land vehicles
37 - Construction and mining; installation and repair services
Goods & Services
Mining equipment; crushing equipment; tools for mining machines; crusher liners; wear segments for crushers; wear plates for machines; consumables for use in mining; quarrying equipment; ceramic masses being parts of machines; metallic and ceramic wear parts or liners for protecting parts of machines in abrasion and impact applications; mechanical shovels; excavators; friction applying devices (parts of machines); clutches other than for land vehicles; drive mechanisms; drilling machines; drill bits for machines; drilling tips for drilling machines; grinding machines; forestry machines; oil drilling rigs; engines, other than for land vehicles; generators; construction machines; ground engaging machines; bearings; hydraulic mechanisms; hydraulic pumps; hydraulic cylinders (machines or parts of machines); spindles for machine tools; camshafts for machines; crank shafts; cylinder blocks (parts of machines); cylinder heads for engines; aprons (parts of machines); conveying machines; rock breaking machines; lifting apparatus; transmission apparatus (other than for land vehicles); filters (parts of machines or engines); brushes (parts of machines or engines); diaphragm pumps; components, parts and accessories for all the foregoing items Land vehicles; trailers; trailers used for transporting heavy equipment; replacement parts, accessories and attachments for trailers, including goosenecks, tow equipment, tow couplers, tow hooks, fifth wheels, replacement parts and components; gooseneck hitches for trailers; replacement parts, accessories and attachments for trucks, mining vehicles and trailers including brake oil coolers, brakes, final drives, transmissions, differentials, axles, wheels and suspension systems; brakes for land vehicles; suspension apparatus for vehicles and trailers; axles for vehicles and trailers; tyres; clutches for land vehicles; wheels for motor vehicles; camshafts for land vehicles; transmission apparatus for land vehicles; components, parts and accessories for all the foregoing items Maintenance and repair services for machinery including the maintenance and repair of trailers, brake oil coolers, brakes, final drives, transmissions, differentials, axles, wheels and suspension systems; quarrying services; engine conversions; maintenance and repair of engines; tuning of engines; machinery installation, maintenance, cleaning, optimisation, modification and repair; rebuilding machines that have been worn or partially destroyed; rental of machine tools
The present invention aims to provide a working machine capable of improving the responsiveness of the driving speed to the target speed of the hydraulic actuator. For this purpose, the controller calculates the target speed of the boom according to the input amount of the operation lever, calculates the actuator target flow rate based on the target speed, calculates the pump target flow rate based on the actuator target flow rate, and based on the input amount of the operation lever, the output value of the inertia measuring device, and the meter-out pressure of the actuator, calculates the target meter-in pressure, which is the target value of the actuator's meter-in pressure, calculates the difference between the driving speed of the boom and the target speed as a speed error, calculates the difference between the meter-in pressure and the target meter-in pressure as a pressure error, and corrects the pump target flow rate according to the speed error and the pressure error.
F15B 11/04 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed
The purpose of the present invention is to efficiently assist in charging an electric construction machine operating at a work site. A charging assistance system 1 comprises a management apparatus 100 for selecting which of a mobile first charging facility 400 and a stationary second charging facility 500 having a higher charging capability than the first charging facility 400 is to be delivered to a work site 300. The management apparatus 100 determines, on the basis of battery information and position information pertaining to each of a construction machine 200 and the second charging facility 500, whether the electric power storage amount of the second charging facility 500 is equal to or greater than a prescribed electric power amount, and whether movement of the second charging facility 500 to the work site 300 will be completed within a prescribed time. The management apparatus 100 selects the second charging facility 500 as an object to be delivered in cases where it is determined that the electric power storage amount of the second charging facility 500 is equal to or greater than the prescribed electric power amount and it is determined that movement of the second charging facility 500 will be completed within the prescribed time.
The purpose of the present invention is to provide technology whereby demand can be accurately predicted even for a component having a small number of received order history data. A component demand prediction method according to the present invention separates an order reception log into order reception, usage purpose data and usage purpose, and component data, and predicts an interval between orders received for a component item for each usage purpose on the basis of the order reception and the usage purpose data (see fig. 5).
G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
A controller of building machinery according to the present invention: performs coordinate calculations to calculate coordinates of a machine body and a work tool on the basis of detection information from an orientation detection device; performs target state amount calculations to calculate, on the basis of a construction target surface and the coordinates of the work tool that is the calculation result of the coordinate calculation, a time series of target state amounts of the work tool, which are target values of state amounts of the work tool in a prescribed time interval that satisfies prescribed conditions; uses a prediction model that predicts the state amounts of the work tool with the speeds of a plurality of hydraulic actuators as control inputs and performs command calculations to calculate speed command values of the plurality of hydraulic actuators on the basis of the deviation between the state amounts of the work tool in the prescribed time interval and the time series of the target state amounts of the work tool, which is the calculation result of the target state amount calculation; and controls the drive of the plurality of hydraulic actuators so that the actual speeds of the plurality of hydraulic actuators, based on the detection information from the state amount detection device, match the speed command values of the plurality of hydraulic actuators.
Provided is a control device for a work machine such as a wheel loader provided with an articulated steering mechanism, the control device making it possible for the work machine to stably travel even on a slope having a gradient. Provided is a control device for a work machine that plans a target route, which is a movement route to a target position, and autonomously travels following the planned target route, wherein the control device comprises a route planning unit 120 that plans the target route on the basis of the current position of the work machine and the target position, and the route planning unit 120 corrects the target route on the basis of gradient information pertaining to a road surface on the target route.
The purpose of the present invention is to provide an information processing device capable of estimating communication quality in a mine with a small computational load and relatively high accuracy. An information processing device according to the present invention comprises: a storage unit that stores terrain information 300 indicating the terrain of a mine, position information indicating the position of a transmission station that transmits radio waves, and wireless communication parameters pertaining to wireless communication between the transmission station and a reception station; and a calculation unit that uses the terrain information 300, the position information, and the wireless communication parameters to generate a direct-wave power map 312 indicating the reception power, at each point in the mine, of direct waves of the radio waves transmitted from the transmission station. The calculation unit corrects (331) the reception power at each point in the direct-wave power map 312 on the basis of a distance difference between a point in the direct-wave power map 312 and one or more peripheral points around the point, and the reception power at the peripheral points in the direct-wave power map (see Fig. 3).
12 - Land, air and water vehicles; parts of land vehicles
37 - Construction and mining; installation and repair services
Goods & Services
Mining equipment; crushing equipment; tools for mining machines; crusher liners; wear segments for crushers; wear plates for machines; consumables for use in mining; quarrying equipment; ceramic masses being parts of machines; metallic and ceramic wear parts or liners for protecting parts of machines in abrasion and impact applications; mechanical shovels; excavators; friction applying devices (parts of machines); clutches other than for land vehicles; drive mechanisms; drilling machines; drill bits for machines; drilling tips for drilling machines; grinding machines; forestry machines; oil drilling rigs; engines, other than for land vehicles; generators; construction machines; ground engaging machines; bearings; hydraulic mechanisms; hydraulic pumps; hydraulic cylinders (machines or parts of machines); spindles for machine tools; camshafts for machines; crank shafts; cylinder blocks (parts of machines); cylinder heads for engines; aprons (parts of machines); conveying machines; rock breaking machines; lifting apparatus; transmission apparatus (other than for land vehicles); filters (parts of machines or engines); brushes (parts of machines or engines); diaphragm pumps; components, parts and accessories for all the foregoing items Land vehicles; trailers; trailers used for transporting heavy equipment; replacement parts, accessories and attachments for trailers, including goosenecks, tow equipment, tow couplers, tow hooks, fifth wheels, replacement parts and components; gooseneck hitches for trailers; replacement parts, accessories and attachments for trucks, mining vehicles and trailers including brake oil coolers, brakes, final drives, transmissions, differentials, axles, wheels and suspension systems; brakes for land vehicles; suspension apparatus for vehicles and trailers; axles for vehicles and trailers; tyres; clutches for land vehicles; wheels for motor vehicles; camshafts for land vehicles; transmission apparatus for land vehicles; components, parts and accessories for all the foregoing items Maintenance and repair services for machinery including the maintenance and repair of trailers, brake oil coolers, brakes, final drives, transmissions, differentials, axles, wheels and suspension systems; quarrying services; engine conversions; maintenance and repair of engines; tuning of engines; machinery installation, maintenance, cleaning, optimisation, modification and repair; rebuilding machines that have been worn or partially destroyed; rental of machine tools
12 - Land, air and water vehicles; parts of land vehicles
37 - Construction and mining; installation and repair services
Goods & Services
Mining equipment; crushing equipment; tools for mining machines; crusher liners; wear segments for crushers; wear plates for machines; consumables for use in mining; quarrying equipment; ceramic masses being parts of machines; metallic and ceramic wear parts or liners for protecting parts of machines in abrasion and impact applications; mechanical shovels; excavators; friction applying devices (parts of machines); clutches other than for land vehicles; drive mechanisms; drilling machines; drill bits for machines; drilling tips for drilling machines; grinding machines; forestry machines; oil drilling rigs; engines, other than for land vehicles; generators; construction machines; ground engaging machines; bearings; hydraulic mechanisms; hydraulic pumps; hydraulic cylinders (machines or parts of machines); spindles for machine tools; camshafts for machines; crank shafts; cylinder blocks (parts of machines); cylinder heads for engines; aprons (parts of machines); conveying machines; rock breaking machines; lifting apparatus; transmission apparatus (other than for land vehicles); filters (parts of machines or engines); brushes (parts of machines or engines); diaphragm pumps; components, parts and accessories for all the foregoing items Land vehicles; trailers; trailers used for transporting heavy equipment; replacement parts, accessories and attachments for trailers, including goosenecks, tow equipment, tow couplers, tow hooks, fifth wheels, replacement parts and components; gooseneck hitches for trailers; replacement parts, accessories and attachments for trucks, mining vehicles and trailers including brake oil coolers, brakes, final drives, transmissions, differentials, axles, wheels and suspension systems; brakes for land vehicles; suspension apparatus for vehicles and trailers; axles for vehicles and trailers; tyres; clutches for land vehicles; wheels for motor vehicles; camshafts for land vehicles; transmission apparatus for land vehicles; components, parts and accessories for all the foregoing items Maintenance and repair services for machinery including the maintenance and repair of trailers, brake oil coolers, brakes, final drives, transmissions, differentials, axles, wheels and suspension systems; quarrying services; engine conversions; maintenance and repair of engines; tuning of engines; machinery installation, maintenance, cleaning, optimisation, modification and repair; rebuilding machines that have been worn or partially destroyed; rental of machine tools
A recycled article management system according to the present invention comprises a first terminal provided to a service site of a machine, a second terminal provided to a recycling site for a component of the machine, and a server, wherein: when a component of the machine is replaced, the second terminal transmits component information relating to the component recycled at the recycling site to the server; the server generates recycled article management information on the basis of the received component information; the first terminal acquires information relating to component replacement from a component removed from the machine and a component to be attached to the machine, and transmits the information to the server; the server updates the recycled article management information on the basis of the information relating to component replacement received from the first terminal, and transmits, to the first terminal, guidance for determining whether the component removed from the machine can be recycled; the first terminal generates either a return report or a full loss report pertaining to the component removed from the machine on the basis of a selection result in the guidance received from the server and transmits the report to the server; and the server updates the recycled article management information on the basis of the information relating to component replacement received from the first terminal and the information included in the return report or the total loss report.
An estimated movement path of the toe of a bucket is calculated on the basis of the orientation of a work device and a required operating direction, and a positional relationship between a target plane and the estimated movement path is calculated, and if it is determined by means of the calculated positional relationship that the estimated movement path intersects the target plane, the toe speed of the bucket is restricted while maintaining the required operating direction, and if it is determined by means of the calculated positional relationship that the estimated movement path does not intersect the target plane, the toe speed of the bucket is controlled by means of a toe speed based on an operation signal output from an operating device. As a result, unnecessary speed restriction is not imposed when there is no possibility of deviating from the target plane, and even if there is a change of state such that deviation toward the target plane is anticipated, good operability can be secured by appropriately performing deceleration and stop control.
There is provided a construction machine that achieves both safety and operability by lowering the possibility of an accident due to contact between the construction machine and a worker in the periphery of a vehicle body while securing operability in situations where an object required for work is present in the periphery. A controller has a normal mode as a control mode for making the operation limiting control effective and a temporary cancelation mode as a control mode for temporarily canceling the operation limiting control. The controller shifts to the temporary cancelation mode in response to operation of the control canceling device while in the normal mode. The controller shifts back to the normal mode in a case where a predetermined condition not responsive to operation of the control canceling device is satisfied while in the temporary cancelation mode.
Provided is a work machine including a control device that calculates a movement command value for an actuator so that a bucket follows a target surface on the basis of a required movement direction relative to the bucket, the required movement direction being calculated in accordance with an operation amount and an orientation, and a drive device that drives the actuator on the basis of the movement command value, wherein: a plurality of candidate bucket lines, which are line segments of an end part of the bucket, are set; the positional relationship between the plurality of candidate bucket lines and the target surface is calculated using at least the distance or the relative angle between each candidate bucket line and the target surface; a bucket line corresponding to required excavation work is selected from among the plurality of candidate bucket lines on the basis of the positional relationship and the operation amount; and the movement command value is corrected so that the angle between the selected bucket line and the target surface decreases. This makes it possible to control the angle of the bucket to an appropriate work orientation that corresponds to the work content, thereby improving operator workability.
This electric work machine comprises a vehicle body. The vehicle body includes batteries 112A to 112D, an electric motor, and an inverter for supplying electric power from the batteries 112A to 112D to the electric motor. The electric work machine includes: hub boxes 151A11, 151A12 connected to the batteries 112A to 112D; and a hub box 151B1 connected to the hub boxes 151A11, 151A12 and the inverter. An output unit of the hub boxes 151A11, 151A12 to the hub box 151B1, an input unit of the hub box 151B1 from the hub boxes 151A11, 151A12, and an output unit of the hub box 151B1 to the inverter are respectively provided with a connector 151S, a connector 152N, and a connector 152S. The connection between the hub boxes 151A11, 151A12 and the hub box 151B1 and the connection between the hub box 151B1 and the inverter are established by a cable 154 or the like via the connector 151S, the connector 152N, and the connector 152S. Thus, an electric work machine capable of easily changing the system output is provided.
E02F 9/00 - Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups
B60R 16/033 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for supply of electrical power to vehicle subsystems characterised by the use of electrical cells or batteries
A vehicle control system includes an on-board terminal mounted on an unmanned dump truck or a manned vehicle and including a first wireless modem communicating with a base station with a first wireless line and a second wireless modem communicating with a wireless base station with a second wireless line; a server device that communicates with the on-board terminal through the wireless base station; a storage section that stores correspondence information in which positional information (LID1 to LID 6) of the unmanned dump truck or the manned vehicle is corresponded with permission/prohibition information that permits or prohibits communication of the second wireless modem; and a control section that permits or prohibits the communication of the second wireless modem according to a position of the unmanned dump truck or the manned vehicle, based on the correspondence information stored in the storage section.
H04W 36/32 - Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
H04W 4/44 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
H04W 64/00 - Locating users or terminals for network management purposes, e.g. mobility management
56.
WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD, AND CONTROL STATION
A plurality of mobile vehicles or a stationary wireless station connected to the plurality of mobile vehicles by wireless communication periodically measures position information and wireless communication quality information indicative of quality of the wireless communication, and reports the measurement results to the control station. The control station groups measurement results belonging to a first time range among the measurement results reported from the plurality of mobile vehicles based on the position information, and learns a distribution of the wireless communication quality information for each grouped position range. The control station obtains a measurement result belonging to a second time range different from the first time range among the measurement results reported from the plurality of mobile vehicles, and derives an outlier abundance ratio in the measurement result belonging to the second time range using the distribution of the wireless communication quality information for each of the learnt position ranges.
An optional device attachment/detachment support system includes a controller for controlling a function for supporting attachment/detachment work of an optional device to a work machine. The controller includes: an object-to-be-attached/detached determination unit for determining an object to be attached/detached that is an optional device to be attached/detached; a work procedure creation unit for creating an attachment/detachment work procedure of the object to be attached/detached on the basis of the mutual relationship of a plurality of optional devices; and a deviation determination unit for outputting a connection device deviation warning when the optional device instructed to be attached/detached next in the attachment/detachment work procedure is different from the newly attached/detached optional device.
Provided is a hydraulic drive system capable of performing calibration without attaching a dedicated component. This hydraulic drive system comprises: a direction control valve that is disposed in a supply line from a hydraulic pump to a hydraulic actuator and that controls the direction in which hydraulic oil is supplied to the hydraulic actuator; a flow rate control valve that is disposed upstream in hydraulic oil flow of the direction control valve of the supply line and controls the flow rate of hydraulic oil supplied from the hydraulic pump to the direction control valve; a solenoid valve that opens and closes the flow rate control valve; and a controller that executes a calibration process for adjusting a command current output to the solenoid valve. In the calibration process, the controller, in a state in which the flow rate control valve is closed and the direction control valve is opened, varies the command current output to the solenoid valve in a direction that opens the flow rate control valve, and identifies the command current at the time when a change is detected in the pressure detected by a pressure sensor as an opening-start current at which the flow rate control valve begins to open.
The present invention provides a construction machine comprising: a lower traveling body; an upper slewing body slewably installed on the lower traveling body; a driver cabin installed on the upper slewing body; imaging devices disposed at least at the front and at the rear of the upper slewing body; a display device installed inside the driver cabin; and a controller that combines video images taken by the imaging devices to generate an overhead video image and displays the generated overhead video image on the display device, wherein the imaging device at the front is installed at a downward tilt to enable imaging of a range in closer proximity to the upper slewing body than the imaging range of the imaging device at the rear, and the controller generates the overhead video image containing a video image taken by the imaging device at the front and a video image taken by the imaging device at the rear. With this arrangement, information that an operator needs can be obtained with greater precision.
Provided is a work machine capable of appropriately switching between prevention of the degradation in a ride quality caused by an inertial force generated in braking of a hydraulic actuator and a work using the inertial force. In the work machine, under a condition where an operation device has been operated from an operation position toward a neutral position, in a case where an actual operation speed of the operation device is less than a quick operation threshold (S21: Yes), a spool is made moved from a supply and discharge position toward a blocking position at a first speed that is slower than a reference speed corresponding to the operation speed (S25, S27 to S29), and at a second speed that is faster than the first speed (S26 to S29) in a case where the operation speed is equal to or more than the quick operation threshold (S21: No).
F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line
F15B 11/08 - Servomotor systems without provision for follow-up action with only one servomotor
Provided is a work machine capable of appropriately controlling a loading work onto a carrier machine by verifying validity of a recognition result of the carrier machine. A hydraulic excavator includes an external measuring device that measures a surrounding environment, an information processing device that recognizes a dump truck present around the hydraulic excavator based on a measurement result of the external measuring device, a control device that controls an operation of the hydraulic excavator based on a recognition result of the information processing device, and a truck information acquisition device that acquires a position and vehicle class information of the dump truck through external communication. The information processing device corrects the recognition result of the dump truck based on the information acquired by the truck information acquisition device. The control device controls the operation of the hydraulic excavator based on the corrected recognition result of the dump truck.
E02F 3/32 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
E02F 3/43 - Control of dipper or bucket positionControl of sequence of drive operations
This construction machine comprises: a first electric circuit including an electric motor for driving a hydraulic pump, a first battery of a power supply, and an inverter for adjusting supply power to the electric motor; a low-voltage second electric circuit including a second battery, an electric fan for cooling hydraulic oil of the hydraulic pump, and a control device for controlling the electric fan and the electric motor; and a DC/DC converter for converting electric power of the first electric circuit to voltage and outputting the voltage to the second electric circuit. The construction machine furthermore comprises a converter controller for detecting an abnormality of the DC/DC converter and limiting driving of the DC/DC converter. The control device restricts driving of the electric fan when an abnormality of the DC/DC converter is detected.
It is an object of the present invention to provide a construction machine that is capable of increasing the accuracy with which to calibrate a machine guidance system or a machine control system. To achieve the object, a controller determines whether a work implement is statically determinate or not on the basis of posture data of the work implement sensed by a posture sensor during a predetermined time after an instruction has been given to calibrate conversion parameters (a mounting angle and a link length) for converting the posture data of the work implement into the coordinates of a first predetermined position (bucket claw tip position) of the work implement, and, when determining that the work implement is statically determinate, calculates updated values of the conversion parameters on the basis the posture data of the work implement sensed by the posture sensor during the predetermined time and the coordinates of a second predetermined position (pin position) of the work implement measured by an external measuring device after the instruction has been given to calibrate the conversion parameters.
The present invention is a work machine comprising: a lower traveling body; an upper turning body that is provided so as to be capable of turning relative to the lower traveling body by means of a turning mechanism; a work device that is attached to the upper turning body; an electric device that uses electric power to generate driving energy for operating the lower traveling body, the turning mechanism, and the work device; a power supply port to which a power cable connected to an external power source can be attached and detached; and a power storage device that can be charged by using electric power supplied from the external power source via the power cable connected to the power supply port, and that is capable of discharging power used for generating the driving energy. The control device restricts at the operation of at least one among the lower traveling body, the turning mechanism, and the work device when connection loss of the power cable is detected after the connection detection device detects the connection of the power cable to the power supply port.
A controller for a work machine is configured to, upon a swing operation being performed, identify the starting position of the movement of the tip of the arm, and a collision avoidance position between that position and the side part of the vessel; and calculate a lower limit value that becomes larger as it gets closer to the collision avoidance position and becomes a collision avoidance height at the collision avoidance position, within the range from the starting position of the movement to the collision avoidance position. The controller, while the swinging body is in motion, is configured to invalidate the operation of the arm and control the movement of the boom and the swinging body so that the height of the tip of the arm does not fall below the lower limit value. The controller is configured to enable the operation of the arm when the tip of the arm exceeds the collision avoidance position. The controller is configured to control the movement of at least one of the boom and the arm in response to the operation of the arm so that the height of the tip of the arm does not fall below the collision avoidance height.
E02F 3/43 - Control of dipper or bucket positionControl of sequence of drive operations
E02F 3/32 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
An articulated vehicle comprising a control device for controlling the operation of the articulated vehicle, which includes a front frame and a rear frame pivotally connected to allow rotation in the left and right directions. The control device sets a reference point for the articulated vehicle on a line that runs vertically to the axle and in the front-rear direction through the center of the left and right sides of the axle of the wheel of the frame on the side of the direction of travel, either on the axle or on the side of the direction of travel further than the axle. It also calculates the position of the reference point at the work site, and based on the predetermined target trajectory as the travel trajectory of the articulated vehicle and the position of the reference point at the work site, it calculates the steering control amount, which is the amount of bending of the front frame relative to the rear frame. This allows for improved tracking accuracy to the target path while suppressing meandering.
A control valve (23) for travel is provided in a lower traveling structure (15) to control the flow of operating oil to be delivered to a hydraulic motor (20) for travel from a hydraulic pump (10). An operating oil tank (12) and the hydraulic motor (20) for travel is connected by a hydraulic pipe (25). The hydraulic pipe (25) is configured of a supply low-pressure pipe part (25A), a pump-side high-pressure pipe part (25B) and a valve-side high-pressure pipe part (25C) for connection between the operating oil tank (12), the hydraulic pump (10) and the control valve (23) for travel, switching high-pressure pipe parts (25D, 25E) that are provided in the lower traveling structure (15) for connection between the control valve (23) for travel motor and the hydraulic motor (20) for travel, and a valve-side low-pressure pipe part (25F) and a tank-side low-pressure pipe part (25G) that are provided across from the lower traveling structure (15) to the upper revolving structure (3) to establish connection between the control valve (23) for travel motor and the operating oil tank (12).
A performance measuring and diagnosing device for a machine includes an information acquisition section, an information preprocessing section, a frequency feature distinguishing section, a frequency feature estimating section, a performance measuring and diagnosing section, and a display section. The information acquisition section acquires state information of the machine. The information preprocessing section preprocesses the state information acquired by the information acquisition section. The frequency feature distinguishing section executes frequency analysis on the data after preprocessing by the information preprocessing section to distinguish between a state frequency feature candidate and a frequency feature indicating noise. The state frequency feature candidate is a candidate for a frequency feature indicating a state of the machine. The frequency feature estimating section estimates the frequency feature corresponding to the state of the machine from among the state frequency feature candidates based on the state frequency feature candidate and the frequency feature indicating noise.
In the work support system equipped with a front work device provided on a hydraulic excavator, an angle sensor that detects the posture information of the front work device, and a controller that provides work support for the hydraulic excavator based on a predetermined and stored work area, a camera capable of imaging the appearance of the hydraulic excavator at the work site, and a touch display capable of specifying any position within the image captured by the camera, the controller configured to extract the image area occupied by the hydraulic excavator from the image captured by the camera and based on the number of pixels in the longitudinal direction of the hydraulic excavator in the extracted image area, the posture information of the hydraulic excavator, and the actual dimensions of the hydraulic excavator, convert the position specified in the image by the touch display into the coordinate values of real space coordinates, and controller set the work area such that the position of the converted coordinate values becomes the endpoint. Accordingly, the intended work area can be set intuitively and easily.
G06V 10/25 - Determination of region of interest [ROI] or a volume of interest [VOI]
G06V 10/75 - Organisation of the matching processes, e.g. simultaneous or sequential comparisons of image or video featuresCoarse-fine approaches, e.g. multi-scale approachesImage or video pattern matchingProximity measures in feature spaces using context analysisSelection of dictionaries
G06V 10/772 - Determining representative reference patterns, e.g. averaging or distorting patternsGenerating dictionaries
A controller of a wheeled hydraulic excavator executes control of a vibration suppression function to control the flow of a hydraulic fluid from a hydraulic cylinder that drives a work implement, thereby suppressing vibration of the hydraulic cylinder when the rotation speed of wheels reaches a predetermined speed or higher. Furthermore, the controller disables the control of the vibration suppression function when the vehicle body is jacked up by the work implement, even when a vibration suppression instructing device has given an instruction for enabling the control of the vibration suppression function.
This diagnostic device is provided with: a first processor that, on the basis of a travel feature amount representing the travel state of a travel device attached to the vehicle body of a work machine, diagnoses an abnormality in the travel device; and an output device that outputs the result of diagnosis by the first processor. The first processor: acquires an inclination feature amount indicating the inclination state of the vehicle body; calculates, on the basis of the inclination feature amount, a correction amount for cancelling out the influence of the inclination state of the vehicle body on the travel feature amount of the travel device; calculates a corrected travel feature amount by correcting the travel feature amount on the basis of the correction amount; calculates an abnormality determination evaluation value on the basis of the corrected travel feature amount; determines whether there is an abnormality in the travel device on the basis of the abnormality determination evaluation value; and outputs the determination result to the output device if it has been determined that there is an abnormality.
An object is to provide a mine management system that can accurately detect that productivity falls out of a plan in connection with a plurality of factors in various mines. A mine management system 1 includes a server device 200 that accumulates and processes working data of mining machines 101 to 103 and a determination device 250 that determines whether or not a working condition of the mining machines 101 to 103 in which the productivity falls out of a plan has occurred. The server device 200 has an extracting section 211 that extracts cycle data as the working data for each work cycle, from the accumulated working data, an indicator computing section 212 that computes a plurality of out-of-plan factor indicators representing occurrence factors of the working condition in which the productivity falls out of a plan in the cycle data, and a learning section 214 that allows the determination device 250 to learn a relationship between the plurality of out-of-plan factor indicators that identify cycle data in which the productivity falls within a plan.
G06Q 10/0639 - Performance analysis of employeesPerformance analysis of enterprise or organisation operations
G07C 5/00 - Registering or indicating the working of vehicles
G07C 5/08 - Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle, or waiting time
A work machine includes an object detection device, a photo shooting device, and a controller that controls starting of a prime mover. The controller determines whether or not an object exists around a machine body on the basis of a detection signal arising from detection by the object detection device. The controller starts the prime mover in a case in which a prime mover starting command has been acquired from an external information terminal and when it is determined that an object does not exist around the machine body. The controller transmits data of video shot by the photo shooting device and a starting approval request of the prime mover to the external information terminal without starting the prime mover in the case in which the prime mover starting command has been acquired from the external information terminal and when it is determined that an object exists around the machine body. The controller starts the prime mover when acquiring an approval command to the starting approval request of the prime mover from the external information terminal.
E02F 3/32 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
A speed-changing device (21) is provided with an input shaft (22), an output shaft (23), a planetary gear mechanism (29), a first variator (33), a second variator (34), and a controller (25). The second variator (34) transmits power, which is transmitted from the first variator (33), to the output shaft (23). A power absorption device (38) is disposed between the second variator (34) and the first variator (33). When the controller (25) changes the absorption torque of the first variator (33) to generate an amount of power equal to or greater than that which can be absorbed in the second variator (34), the power is absorbed by the power absorption device (38) to increase the torque of the output shaft (23).
F16H 47/04 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion
A control device of an electric hydraulic excavator sets or computes a rotation speed command and an allowable torque of an electric motor on the basis of a required rotation speed of the electric motor, and a sum of a suppliable electric power of a converter and a battery suppliable electric power. An inverter of the electric hydraulic excavator sets the allowable torque to a torque command if a calculated torque of the electric motor computed by multiplying by a gain, a difference between the rotation speed command and a rotation speed of the electric motor, exceeds the allowable torque, and sets the calculated torque to the torque command if the calculated torque does not exceed the allowable torque. The inverter supplies the electric power that can generate a torque corresponding to the torque command to the electric motor.
B60L 9/00 - Electric propulsion with power supply external to the vehicle
B60L 15/00 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
B60L 50/70 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
A battery diagnosis system includes a controller that obtains operation data of a power storage device including a plurality of secondary battery cells, computes a battery state value on the basis of the obtained operation data, and diagnoses a state of the power storage device on the basis of the computed battery state value, and an output device that outputs a result of the diagnosis of the power storage device performed by the controller. The operation data includes a minimum value and a maximum value of cell voltages of the plurality of secondary battery cells constituting the power storage device. The controller computes a minimum cell capacity or a maximum cell resistance as the battery state value on the basis of the minimum value of the cell voltages measured when a charge/discharge state of the power storage device is a first state and the maximum value of the cell voltages measured when the charge/discharge state of the power storage device is a second state.
G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
G01R 31/388 - Determining ampere-hour charge capacity or SoC involving voltage measurements
G01R 31/389 - Measuring internal impedance, internal conductance or related variables
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
In a remote operation system that includes a matching server for matching a construction machine and a plurality of remote operation devices, wherein the matching server searches for and presents candidate works to a first remote operation device operated by a first operator who has logged in and authenticated, searches for a second operator, when a notification of an assist request is received from the first remote operation device for the selected work selected from the candidate works, the second operator who can assist the selected work from among the logged-in operators based on the database, informs a second remote operation device operated by the second operator of the assist request and the work related to the assist request, communicatively connects both of the first and the second remote operation devices to the construction machine to be operated for the selected work based on the database, when a notice of acceptance of the assist request from the second remote operation device.
This inspection workflow management system includes a server for managing an inspection workflow indicating an inspection procedure for a work machine, and a terminal connected to the server via a network. The terminal includes: a communication unit that is connected to the work machine to be inspected and acquires identification information of the work machine; a display unit that displays an inspection workflow including an instruction for acquiring moving image data of an inspection target portion of the work machine; an operation unit for inputting inspection-related information corresponding to the inspection workflow; and an imaging unit that acquires moving image data of the inspection target portion. The server includes a storage unit for storing machine attribute information of the work machine associated with the identification information, and the moving image data of the inspection target portion acquired by the terminal. The terminal associates the identification information and the inspection-related information with the moving image data of the inspection target portion acquired by the imaging unit. The server further associates the machine attribute information with the moving image data of the inspection target portion for which the association has been performed, and stores the machine attribute information in the storage unit. The terminal or the server further includes a search unit that, on the basis of at least one of the identification information, the inspection-related information, and the machine attribute information that has been input to the terminal, extracts the moving image data of the inspection target portion associated with the at least one information.
An object of the present invention is to provide a short-range wireless communication system that can connect a portable communication terminal to an in-machine communication terminal via short-range wireless communication while complying with the latest laws and regulations. For this purpose, a management server includes a storage section that acquires and stores information on the latest laws and regulations, and determines whether the current position of a machine body received from the in-machine communication terminal is included in a region in which short-range wireless communication is permitted, on the basis of the information on the latest laws and regulations stored in the storage section when receiving a wireless communication turn-on request from the portable communication terminal. The management server transmits the short-range wireless communication turn-on request to the in-machine communication terminal when determining that the current position is included in a region in which the short-range wireless communication is permitted, and keeps the short-range wireless communication turn-on request from being transmitted to the in-machine communication terminal when determining that the current position is not included in a region in which the short-range wireless communication is permitted.
H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
H04W 4/021 - Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
H04W 4/70 - Services for machine-to-machine communication [M2M] or machine type communication [MTC]
80.
ZIRCONIA SINTERED BODY AND PRODUCTION METHOD FOR THE SAME
A zirconia sintered body with excellent translucency and hydrothermal degradation resistance is provided. A production method for a zirconia sintered body that is to be disclosed herein includes a process body preparing step of preparing a process body containing zirconia and yttria and/or ytterbia, in which a total proportion of the yttria and the ytterbia is 4 mol % or more and 6 mol % or less when a total of the zirconia, the yttria, and the ytterbia is set to 100 mol %, a first heating step of heating the process body at 800° C. or higher and 1200° C. or lower, a second heating step of heating the process body after the first heating step at 1600° C. or higher and 2000° C. or lower by microwave heating, and a cooling step of decreasing a temperature of the process body after the second heating step to 1300° C. at a rate of 50° C./min or more.
The present disclosure provides a parameter selection device for a work machine that enables the work machine to efficiently travel at a work site where a travel route or a slope changes from moment to moment. The parameter selection device includes a parameter selection section. The parameter selection section calculates an average loaded travel distance per cycle, a travel ratio for each slope in loaded travel, and a virtual travel distance for each slope per cycle of the work machine (processing P1-P3). Further, the parameter selection section calculates a predicted fuel consumption amount for each slope per cycle, a travel time for each slope per cycle, a predicted fuel consumption amount per unit load weight, and a predicted production amount per cycle (processing P4-P8). Then, the parameter selection section selects a recommended parameter set, based on the predicted fuel consumption amount and the predicted production amount per cycle for each parameter set (processing P9).
B60W 10/06 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
G05D 1/222 - Remote-control arrangements operated by humans
B60W 30/188 - Controlling power parameters of the driveline, e.g. determining the required power
G05D 105/05 - Specific applications of the controlled vehicles for soil shifting, building, civil engineering or mining, e.g. excavators
G05D 107/70 - Industrial sites, e.g. warehouses or factories
Provided is an automated control system for a work machine capable of suppressing deterioration of the workability in automated work caused by instability of the ground for the work machine. An automated traveling control section 703 performs automated traveling of the work machine; an automated work control section (automated excavation control section 704) performs automated work of the work machine; and a stability determination section 702 determines stability of ground for the work machine. When execution of automated traveling control by the automated traveling control section 703 is to be followed by execution of automated work control by the automated work control section (automated excavation control section 704), stability determination by the stability determination section 702 is executed before executing the automated work control, and automated control of the work machine is executed on the basis of a determination result obtained by the stability determination section 702.
An appropriate graphical display during a series of operations of a work machine is made possible. This display control device acquires three-dimensional terrain information indicating a shape of a terrain of the area for work. Information regarding an attitude of the work machine is acquired to calculate a position of the bucket in the area for work. An AR image is generated on the basis of the terrain information and the position of the bucket, and the AR image to be overlaid over the video of the area for work is displayed on the display. The generated AR image includes a first figure highlighting the position of the bucket, and a second figure highlighting a part of a second region adjacent to a first region, the first region including a portion in which the first figure is projected in a vertical direction or a front-rear direction of the work area.
A work machine includes a machine body, a work device attached to the machine body, a monitoring device that is attached to the machine body and monitors the surroundings of the machine body or the inside of the machine body, a storage device in which identification information of the machine body is stored, a controller that controls the monitoring device, and a communication device that executes communication with the external. The controller determines whether or not identification information of a part to be attached to the machine body or the work device is included in monitoring information acquired by the monitoring device, and associates the identification information of the part with the identification information of the machine body, the identification information of the machine body being stored in the storage device, and transmits the identification information of the part and the identification information of the machine body to the external by the communication device when the identification information of the part is included in the monitoring information.
A plurality of control valves (39A to 39D, 40A to 40D, 41A to 41D, 42A to 42D, 43) is aligned and disposed in the right-and-left direction and in the vertical direction on a first mounting surface (38C) and a second mounting surface (38D). Further, a plurality of control valves (47, 48) is aligned and disposed in the right-and-left direction and in the vertical direction on a first mounting surface (46B) and a second mounting surface (46C).
An objective of the present invention is to provide a noise calculation device and a sound collection system capable of distinguishing between a target sound and a noise included in ambient sound. A noise calculation device 20 of the present invention calculates a noise sound pressure level of the noise included in the ambient sound of an analysis target 40, which includes the target sound emitted by the analysis target 40. The noise calculation device 20 identifies the reference sound pressure level of the target sound corresponding to a distance from the analysis target 40 to the microphone 209 using a physical model that defines a relationship between the distance and the reference sound pressure level of the target sound. The noise calculation device 20 calculates an estimated sound pressure level of the noise included in the ambient sound based on a detected sound pressure level of the ambient sound detected by the microphone 209 and the reference sound pressure level of the target sound identified using the physical model.
G10L 25/51 - Speech or voice analysis techniques not restricted to a single one of groups specially adapted for particular use for comparison or discrimination
A feedback throttle (54) increases the opening amount between a feedback flow passage (49) and a back pressure chamber (47) as a main valve (43) is displaced in the direction away from a main valve seat (46). The feedback throttle (54) has a boundary portion K that divides a section where the opening amount of the feedback throttle (54) changes such that a ratio of change in the opening amount of the feedback throttle (54) to a displacement of the main valve (43) in the direction coming closer to the main valve seat (46) becomes smaller. The boundary portion K is located in a displacement area of the main valve (43) corresponding to a position where an opening portion of a main valve throttle (53) is shut off with respect to the displacement of the main valve (43) in the direction coming closer to the main valve seat (46).
F16K 3/26 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
F16K 15/18 - Check valves with actuating mechanismCombined check valves and actuated valves
F16K 31/383 - Operating meansReleasing devices actuated by fluid in which fluid from the conduit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston
A closed-circuit pipe group (30) that constitutes a closed circuit system (25 to 28) is distributed through upper positions of a closed-circuit hydraulic pump (29) and an open-circuit hydraulic pump (35) along an upper surface plate (22) of a housing (20). Further, an open-circuit pipe group (36) that constitutes an open circuit system (31 to 34) is distributed through lower positions of the closed-circuit hydraulic pump (29) and the open-circuit hydraulic pump (35) along a revolving frame (8). Therefore, a working space for performing operational work can be formed between the closed-circuit pipe group (30) and the open-circuit pipe group (36).
E02F 3/32 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
E02F 3/42 - Drives for dippers, buckets, dipper-arms or bucket-arms
E02F 9/08 - SuperstructuresSupports for superstructures
A close call is surely extracted at a site where a construction machine is used. A recording section, a trigger determination section, and a video recording management section are included, the recording section where video data is transitorily or non-transitorily recorded, the trigger determination section determining whether a video recording trigger is enabled, the video recording management section non-transitorily recording, in the recording section, the video data for a predetermined period of time before and after a point in time when the video recording trigger is enabled, of the video data transitorily recorded in the recording section, when it is determined that the video recording trigger is enabled. The trigger determination section determines that the video recording trigger is enabled when an object is detected by an object detection sensor attached to a vehicle body and a predetermined operation performed on the construction machine is restricted.
An object of the invention is to provide a technique capable of performing strategic inventory management in consideration of a profitability for each item by calculating an inventory management cost in accordance with an actual state in consideration of an item characteristic, a cost occurrence factor, and the like for each item. An inventory assessment system according to the invention stores relevance data in which a combination of occurrence cause items, which are causes of occurrence of inventory management cost items, is defined for each of the cost items, and calculates a load ratio of the inventory management cost for each of items having the same combination of the occurrence cause items.
This invention determines the quality of an arrangement of a plurality of wireless base stations. A remote communication system 100 comprises: a first remote communication unit 110 which is communicably connected to a mobile wireless base station 40-1 and a mobile wireless base station 40-2, and is mounted on a construction machine; and a second remote communication unit 120 which is communicably connected to the mobile wireless base station 40-1 and the mobile wireless base station 40-2, and which transmits/receives data to/from the first remote communication unit 110 via the mobile wireless base station 40-1 and the mobile wireless base station 40-2. The first remote communication unit 110 and/or the second remote communication unit 120 has a monitoring function for determining the quality of an arrangement of the mobile wireless base station 40-1 and the mobile wireless base station 40-2 on the basis of the communication quality of a wireless line 300 and a wireless line 310.
H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
Construction machines and apparatus, not including
loading-unloading machines and apparatus; earth moving
machines; excavators; power shovels; hydraulic excavators.
Provided are a transport vehicle and a control system that enable the condition of a travelled road surface to be ascertained using a simple method. A dump truck comprises: a travel-use electric motor for driving rear wheels; a steering device for steering front wheels; an inverter for detecting an operation amount of the travel-use electric motor; a steering angle sensor for detecting the operation amount of the steering device; and a control device for calculating operation amounts of the travel-use electric motor and the steering device which serve to perform autonomous travel according to a target route and a target speed, and for performing travel control based on the calculated operation amounts. The control device has: a reference operation amount estimation unit that estimates a reference operation amount which is the operation amount of the steering device in a case where the travelled road surface is in a reference condition; an operation amount comparison unit that compares the reference operation amount estimated by the reference operation amount estimation unit with the calculated operation amount of the steering device; and a road surface condition determination unit that determines, on the basis of the comparison result from the operation amount comparison unit, whether the travelled road surface is more slippery than in the reference condition, and that outputs the determination result.
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
B60W 10/08 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
B60W 10/20 - Conjoint control of vehicle sub-units of different type or different function including control of steering systems
In the present invention, a control device: calculates, on the basis of map data and the amount of a load on a vehicle, a return power amount which is the amount of power required for traveling from each point on a travel route to a charging point which is a point where a power supply device is disposed, such calculation performed before the vehicle begins to travel on the travel route which is from the charging point to a prescribed destination; calculates a predicted power amount which predicts the remaining battery power of a power storage device at each point on the travel route from the current position of the vehicle to the prescribed destination, such calculation performed while the vehicle travels toward the prescribed destination on the travel route; and changes the destination of the vehicle from the prescribed destination to another destination if there is a point, from among the points on the travel route from the current position to the prescribed destination, at which the predicted power amount falls below the return power amount.
B60L 50/53 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
G08G 1/00 - Traffic control systems for road vehicles
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
This construction machine comprises: a vehicle body; a driver cab that is provided to the vehicle body and that is boarded by an operator; a surrounding detection device that is provided to the vehicle body and that detects an obstacle around the vehicle body; a warning device that is provided to the driver cab; and a control device that arouses attention through the warning device in the case where the surrounding detection device detects an obstacle within a preset detection range. The construction machine is provided with an operation state switching device that switches the construction machine between an operable state and an inoperable state. The control device sets, when the state is switched to the operable state by the operation state switching device, a first range which has been prescribed around the vehicle body as the detection range, and sets, when the state is switched to the inoperable state by the operation state switching device, a second range which is around the vehicle body and has been prescribed at least partially smaller than the first range as the detection range. Accordingly, the operator can be informed of the existence of surrounding obstacles, while unnecessary warnings during the inoperable state are reduced.
Provided is a work machine capable of achieving both significant increase/decrease in engine rotation speed and ease of fine adjustment. In the work machine provided with: a power device that rotationally drives; a work device that operates using the power device as a power source; and an instruction device that issues instructions to increase and decrease the rotation speed of the power device, the instruction device has a first instruction device and a second instruction device. The minimum change unit of the rotation speed of the power device that can be instructed by the first instruction device is different from the minimum change unit of the rotation speed of the power device that can be instructed by the second instruction device.
F02D 11/02 - Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by hand, foot, or like operator controlled initiation means
F02D 11/04 - Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by mechanical control linkages
Provided is a work machine including an input device to which a plurality of functions can be selectively assigned, for example, the work machine being capable of presenting information indicating a current function assignment without causing misidentification of an assigned function and without reducing visibility of other display information during work. This work machine comprises: an input device to which one of a plurality of functions can be selectively assigned; and a display device for displaying either a first display screen including current function assignment information of the input device or a second display screen not including current function assignment information of the input device. The control device performs control to execute processing according to the current function assignment of the input device when the input device is operated in a state where the first display screen is being displayed on the display device, and to switch the display screen of the display device from the second display screen to the first display screen without executing processing according to the current function assignment of the input device when the input device is operated in a state where the second display screen is being displayed on the display device.
B60R 16/02 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric
The present invention provides a construction machine comprising: a shut-off lever for restricting an operation of an operation lever device; a camera for image-capturing a periphery of a vehicle body; a monitor for displaying a camera image captured by the camera; a monitor operation device for instructing an enlargement of a display magnification of the camera image; and a control device for controlling the displaying of the monitor in accordance with an operation of the monitor operation device. When the operation of the operation lever device is restricted by the shut-off lever, the control device for controlling the displaying enlarges a camera image displayed on the monitor in accordance with the display magnification instructed by the monitor operation device, and causes the monitor to display the camera image at a pre-determined prescribed display magnification when the restriction of the operation of the operation lever device by the shut-off lever is released, even when enlargement of the display magnification is instructed by the monitor operation device. Thus, oversight of obstacles by the operator is suppressed during driving.
H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
B60R 1/20 - Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
B60R 1/25 - Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles for viewing an area outside the vehicle, e.g. the exterior of the vehicle with a predetermined field of view to the sides of the vehicle
B60R 1/26 - Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles for viewing an area outside the vehicle, e.g. the exterior of the vehicle with a predetermined field of view to the rear of the vehicle
This work machine is provided with: a direction control valve that controls the flow of pressure oil to a hydraulic actuator; a flow rate control valve that is disposed upstream of the direction control valve and controls the flow rate of pressure oil to the hydraulic actuator; and a control device that controls the direction control valve and the flow rate control valve on the basis of instruction information, which is an operation instruction to the driven body that is driven by the hydraulic actuator. The control device determines whether a differential pressure across the flow rate control valve obtained from the detection value of the pressure sensor is within a predetermined range. If the differential pressure across the flow rate control valve is outside the predetermined range, the control device controls the direction control valve by using a final target opening, which is calculated by adjusting the target opening of the direction control valve calculated on the basis of the instruction information so that the differential pressure across the flow rate control valve falls within the predetermined range.
F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line
The present invention makes it possible to maintain a discharge pressure of a main pump at a pressure equal to or higher than a predetermined minimum pressure when an operation lever is not operated, and, when the operation lever is operated, to supply a sufficient volume of pressure oil to a hydraulic actuator of a direction control valve which is tandem-connected on the downstream side of a bypass cut valve disposed in the middle of a center bypass oil passage. Thus, the bypass cut valve is disposed between a first direction control valve and a second direction control valve of the center bypass oil passage. When all of the direction control valves are in neutral position, a controller maintains the opening area of the bypass cut valve in a predetermined minimum opening area, and controls the discharge volume of the main pump so that the discharge pressure of the main pump becomes a pressure equal to or higher than a predetermined minimum discharge pressure. When the second direction control valve positioned on the downstream side of the bypass cut valve is operated, the controller controls the opening area of the bypass cut valve to increase as the spool stroke amount of the second direction control valve increases.
F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
F15B 11/02 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
F15B 11/028 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force
