Abstract: A state estimation system of a dump truck including an engine and a dump body that includes a flow path through which exhaust gas discharged from the engine flows and on which a load is loaded includes an exhaust gas flow rate acquisition unit that acquires an exhaust gas flow rate indicating detection data of a flow rate of the exhaust gas flowing into the flow path, an exhaust gas temperature acquisition unit that acquires an exhaust gas temperature indicating detection data of a temperature of the exhaust gas flowing into the flow path, and a body temperature estimation unit that estimates a body temperature indicating a temperature of a predetermined portion of an inner surface of the dump body in contact with the load on the basis of the exhaust gas flow rate and the exhaust gas temperature.

Abstract: A management system of an unmanned dump truck includes: a path generation unit configured to generate a path indicating a target traveling route of an unmanned dump truck such that the unmanned dump truck enters a discharging point; and an assignment unit configured to assign a second discharging point and a second path to enter the second discharging point to a second unmanned dump truck, based on a first discharging point and a first path to enter the first discharging point assigned to a first unmanned dump truck.

Abstract: A display system for a work machine includes: a display unit that performs a display of an image of surroundings of the work machine and of a function pertaining to delayed stop control of an engine of the work machine.

Abstract: A decrease in work efficiency is suppressed. A work machine includes a front wheel, a front wheel drive device that rotationally drives the front wheel, a rear wheel, a rear wheel drive device that rotationally drives the rear wheel, and a controller that controls a speed ratio that is a ratio of a speed of the front wheel to a speed of the rear wheel. The controller determines whether a predetermined variation occurs in a driving force applied to the front wheel, and when it is determined that the predetermined variation occurs, the controller reduces the speed ratio and thus eliminates the predetermined variation, and when the predetermined variation is eliminated, the controller increases the speed ratio.

Abstract: A work state estimation system for a work machine includes an inclination angle acquisition unit configured to acquire an inclination angle of a work machine, and a work state estimation unit configured to estimate a work state of the work machine on the basis of a change in the inclination angle. The inclination angle includes at least a pitch angle.

Abstract: A construction management system includes an output unit that causes a display device to display a remotely operable work machine, a selection data acquisition unit that acquires machine selection data indicating specification of the work machine, and a remote operation permission unit that permits start of a remote operation of the work machine based on the machine selection data.

Abstract: A work machine surroundings monitoring system includes a first display image generation unit that generates a first display image indicating surroundings of a work machine on the basis of a camera image of a camera that captures an image of the surroundings of the work machine, a second display image generation unit that generates a second display image in a display mode different from that of the first display image on the basis of camera images of a plurality of cameras that capture images of the surroundings of the work machine, and a display control unit that generates a signal for displaying the first display image on a part of a display screen, displaying the second display image on a part of the display screen, and displaying a boundary image at a boundary between the first display image and the second display image on the display screen.

Abstract: A work machine includes: a detection unit that detects an articulation angle; a hydraulic cylinder for steering; an operation apparatus that receives an input of an operation command from an operator to drive the hydraulic cylinder for steering; a control valve that controls an amount of driving of the hydraulic cylinder for steering; and a controller that outputs a command current that causes the control valve to operate in response to the operation command of the operation apparatus. The controller executes a calibration mode for correcting the command current corresponding to the operation command of the operation apparatus and causing the control valve to operate. In the calibration mode, the controller cuts off the command current to the control valve when the articulation angle becomes equal to or larger than a prescribed angle.

Abstract: A work machine start-up system includes a control unit configured to control a work machine, a proximity detection unit configured to detect that a specific operator is in close proximity to the work machine, and a start-up unit configured to start at least part of the control unit when it is detected that the specific operator is in close proximity to the work machine.

Abstract: A reactor core of the magnetically coupled reactor includes a first outer core portion including two first leg portions extending in a first direction and a first base portion linking the two first leg portions, a second outer core portion including two second leg portions extending in the first direction and a second base portion linking the two second leg portions, and an intermediate core portion integrally extending continuously in the first direction and connecting the first leg portions and the second leg portions, in which a first connection portion, to which the first leg portions and the intermediate core portion are connected, is positioned in which a first coil portion is wound in the first direction, and a second connection portion, to which the second leg portions and the intermediate core portion are connected, is positioned in which the second coil portion is wound in the first direction.

Abstract: A management system for an unmanned vehicle includes: a traveling path generation unit, configured to generate a traveling path of an unmanned vehicle; a speed calculation unit, configured to calculate a target traveling speed of the unmanned vehicle traveling along the traveling path, based on the traveling path; and a detection unit, configured to detect a deceleration position indicating a position where the target traveling speed drops in the traveling path.

Abstract: A treatment device includes an acquisition unit configured to acquire regeneration information, which is information related to a regeneration interval of a filter that collects a particulate matter in an exhaust gas of an engine, and ash information, which is information indicating an estimated value of a deposition amount of ash deposited on the filter, a determination unit configured to determine whether or not the filter needs to be cleaned based on the regeneration information and the estimated value indicated by the ash information, and a notification unit configured to issue a notification that the filter needs to be cleaned in a case where it is determined that the filter needs to be cleaned.

Abstract: A system for setting an operation range of an excavation machine includes a surroundings information acquisition unit that acquires information on an actual image of the surroundings of the excavation machine, a user interface unit, and a controller that generates a surroundings image based on the information on the actual image acquired by the surroundings information acquisition unit and that displays, on the user interface unit, the surroundings image and a setting guidance image for setting a virtual wall that regulates the operation range of the excavation machine.

Abstract: A coupler cylinder is driven between a locked state and an unlocked state of a bucket by being supplied with hydraulic oil. A main pump supplies the hydraulic oil to the coupler cylinder. A pressure increasing valve controls the supply of the hydraulic oil to the coupler cylinder. A controller controls drive of the pressure increasing valve. The controller instructs the pressure increasing valve to stop the supply of the hydraulic oil to the coupler cylinder based on pressure in an oil passage between the main pump and the coupler cylinder.

Abstract: An abnormality determination system applicable to a work machine includes: a stereo camera mounted on a wheel loader having working equipment; a position data calculation unit that estimates a position of the working equipment in a captured image of the stereo camera based on a posture of the working equipment when captured by the stereo camera; and a determination unit that determines whether the stereo camera is normal based on the estimated position of the working equipment.

Abstract: A voltage conversion system includes: a plurality of DC-DC converters having inputs connected in parallel and having outputs connected in series; and a switch provided in parallel to the output of at least one DC-DC converter of the plurality of DC-DC converters and turning into an on-state or an off-state, based on a rotation command of a motor.

Abstract: A work machine includes a vehicle body, a steering control wheel, a first actuator, a second actuator, a steering angle sensor, a leaning angle sensor, and a controller. The steering control wheel is supported by the vehicle body. The first actuator changes a steering angle of the steering control wheel. The second actuator changes a leaning angle of the steering control wheel. The steering angle sensor outputs a first angle signal indicative of the steering angle. The leaning angle sensor outputs a second angle signal indicative of the leaning angle. The controller acquires the first angle signal and the second angle signal, acquires the steering angle based on the first angle signal, acquires the leaning angle based on the second angle signal, acquires a target leaning angle corresponding to the steering angle, and controls the second actuator so that the leaning angle becomes the target leaning angle.

Abstract: A control device is a control device of a work machine including a swing body swinging around a swing center and work equipment attached to the swing body. The control device includes an excavation-start-position determination unit. The excavation-start-position determination unit determines a start position of an excavation operation for each single excavation operation on the basis of at least an excavation time required for the excavation operation and a swing time required for a loading swing and a return swing when the excavation operation, a dumping operation, and the loading swing and the return swing between the excavation operation and the dumping operation are automatically performed by the work equipment.

Abstract: A controller provided in a bulldozer maintains the engagement of an inside steering clutch over a predetermined period beginning from a switching start point at which switching starts, when switching from a slow turn mode to a pivot turn mode, and when switching from the pivot turn mode to the slow turn mode, maintains the braking of an inside steering brake over a predetermined period beginning from a switching start point at which the switching starts.

Abstract: A wheel loader includes a vehicle body frame, a transmission mechanism, a support section, a movable section, a joystick lever, and an urging mechanism. The transmission mechanism transmits a movement of the vehicle body frame. The support section is fixed with respect to the vehicle body frame. The movable section is connected to the transmission mechanism and is movably supported by the support section. The movement of the vehicle body frame is input to the movable section. The joystick lever accepts an operation to move with respect to the movable section by the operation. The urging mechanism adjusts a movement of the movable section with respect to the support section.