Abstract: A remote operation system of a work machine includes a remote operation device that generates an operation signal for remotely operating the work machine, an operation command transmission unit that transmits an operation command based on the operation signal, and an operation control unit that controls the work machine such that a first operation speed indicating an operation speed of the work machine when communication between the work machine and the remote operation device is established is slower than a second operation speed indicating a predetermined operation speed associated in advance with an operation amount of the remote operation device.

Abstract: A control device of a work vehicle includes a braking force function determination unit and a required braking force function determination unit. The braking force function determination unit determines at least one of an offset and an inclination for a required braking force in a braking force function which indicates a relationship between a rotational speed of an output shaft of a transmission and the required braking force and in which the required braking force monotonically increases with respect to the rotational speed such that the smaller a stage number of a selected speed stage which is input into a traction force instruction device, the larger an absolute value of at least one of the offset and the inclination. The required braking force function determination unit determines the required braking force based on the rotational speed of the output shaft of the transmission and the braking force function.

Abstract: A power determination unit determines a target power generation amount of a fuel cell, based on a time series of measurement values relating to power while a work vehicle travels along a predetermined travel route. A fuel cell control unit controls the fuel cell to output the target power generation amount while the work vehicle travels along the travel route. A battery control unit controls charging or discharging of a battery, based on a difference between required power required for driving the work vehicle and the target power generation amount while the work vehicle travels along the travel route.

Abstract: A control system of a work machine including a lower traveling body and an upper turning body that can turn with respect to the lower traveling body includes a detection device attached to the upper turning body and detecting an object present around the work machine, and a controller controlling operation of the lower traveling body and the upper turning body. The controller controls the operation of the lower traveling body on the basis of a position of the object detected by the detection device and a lower traveling body stop region, and controls the operation of the upper turning body on the basis of the position of the object detected by the detection device and an upper turning body region different from the lower traveling body stop region, and the lower traveling body stop region is set in a coordinate system based on the upper turning body.

Abstract: A work machine where a plurality of exhaust treatment devices can appropriately be arranged is provided. The work machine includes an engine, a first exhaust treatment device that treats exhaust emitted from the engine, and a second exhaust treatment device that treats exhaust that has passed through the first exhaust treatment device. A longitudinal direction of the first exhaust treatment device is inclined with respect to a fore/aft direction and a lateral direction and inclined with respect to a longitudinal direction of the second exhaust treatment device.

Abstract: A sprinkling vehicle management system includes: a water amount data acquisition unit that acquires water amount data indicating an amount of water stored in a tank of a sprinkling vehicle for sprinkling; and a speed setting unit that sets a traveling speed of the sprinkling vehicle based on the water amount data.

Abstract: A work machine monitoring system includes a measurement data acquisition unit that acquires measurement data of a ground on which a work machine travels by contact of a rotating member included in the work machine and rotation of the rotating member, a determination criteria setting unit that sets determination criteria for determining presence or absence of a boulder on the ground in the measurement data, a boulder determination unit that determines the presence or absence of the boulder on the ground in the measurement data based on the determination criteria, and a warning control unit that outputs a warning from an output device based on determination of the presence or absence of the boulder.

Abstract: A tunnel excavation device includes a front body portion configured to support a cutter head and a rear body portion. The rear body portion includes a gripper carrier and a gripper portion. The gripper carrier is disposed in a rear of the front body portion. The gripper portion is provided on the gripper carrier. The gripper portion includes a groove portion and a wheel portion. The groove portion is formed in a recess shape toward the rear main body. The wheel portion is disposed in the groove portion.

Abstract: A motor grader in which a motive power source of an electric motor can appropriately be arranged is provided. The motor grader includes a front frame, a rear frame, and a coupling shaft. The rear frame is arranged in the rear of the front frame. The coupling shaft couples the front frame to the rear frame as being pivotable with respect to the rear frame. The motor grader includes a front wheel rotationally driven to run the motor grader, the electric motor that generates driving force for rotationally driving the front wheel, and a battery in which electric power supplied to the electric motor is stored. The battery is arranged in front of the coupling shaft.

Abstract: A crawler-type work machine includes left and right steering brakes configured to brake left and right output shafts, a turning motor configured to produce a rotation speed difference between the left and right output shafts, work implement cylinders configured to drive a work implement attached to a vehicle body, a hydraulic pressure supply unit configured to supply hydraulic fluid to the turning motor and the work implement cylinders, and a controller configured to control the hydraulic pressure supply unit. The controller is configured to execute a hydraulic fluid amount control in order to reduce the hydraulic fluid amount supplied from the hydraulic pressure supply unit to the turning motor when the work implement cylinders are driven while the turning motor is rotating.

Abstract: A first payload computation value which represents a weight of loads loaded on the work implement in a first attitude is obtained. The first attitude and a second attitude are equal to each other in ratio between a horizontal distance from a position of a center of gravity of a first link member to a base end of the first link member and a horizontal distance from a position of the center of gravity of the loads loaded on the work implement to the base end. A second payload computation value which represents a weight of loads loaded on the work implement in the second attitude is obtained. When the first payload computation value and the second payload computation value are determined as being different from each other, a weight of a second link member is changed and processing above is repeated.

Abstract: A display system includes a state value acquisition unit that acquires a state value of a work machine at the time when the work machine is driven by an operator to implement cycle work for repeating a series of work modes, an actual value calculation unit that calculates, based on the state value, an actual value relating to driving evaluation of the work machine for each of work modes, a target value setting unit that sets a target value relating to driving evaluation for each of work modes, and a display control unit that displays the actual value and the target value on a display device.

Abstract: A work machine monitoring system includes a measurement data acquisition unit that acquires measurement data of working equipment included in the work machine at a predetermined sampling rate, a defect determination unit that determines presence or absence of a defect in the working equipment in the measurement data, a counting unit that counts the number of defect determination samples indicating the measurement data determined to have the defect, and a warning control unit that changes a warning pattern output from an output device based on the number of defect determination samples.

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: An electric cylinder includes a motor that is a driving source, an output shaft configured to rotate in response to driving of the motor, a sun gear coupled to the output shaft and configured to rotate in response to the rotation of the output shaft, a tubular holder disposed adjacent to an axial end surface of the motor and including a fluid accommodation portion that allows a magnetic fluid to be accommodated between the holder and an outer periphery of the sun gear, a pair of magnetic pole pieces provided on an inner peripheral surface of the holder, and a magnet disposed between the pair of magnetic pole pieces and configured to hold the magnetic fluid in the fluid accommodation portion by using an action of a magnetic field.

Abstract: A control method for a tunnel excavation device is provided. While grippers of a rear body section protrude outward and the rear body section is secured to an inner wall of a tunnel, a plurality of thrust cylinders are controlled so that a front body section is made to move forward along a movement prediction line set based on a tunnel excavation plan line. While grippers of the front body section protrude outward and the front body section is secured to the inner wall of the tunnel, the plurality of thrust cylinders are controlled so that the rear body section is made to move forward along a movement prediction line set based on an actual result line.

Abstract: A system includes a region data module and a planning module. The region data module acquires excavation region data and embankment region data. The excavation region data indicates positions of a plurality of excavation regions at a work site. The embankment region data indicates positions of a plurality of embankment regions at the work site. The planning module determines, as a construction plan, a construction sequence and a target travel path including a combination of a plurality of travel paths connecting the excavation regions and the embankment regions while taking into account a change in a topography at the work site.

Abstract: A boom is attached to a machine main body. A bucket is attached to the boom. A boom cylinder is attached to the machine main body and drives the boom. A bucket cylinder is attached to the machine main body and drives the bucket with respect to the boom. A controller calculates a mass of a load within the bucket based on boom cylinder force and bucket cylinder force.

Abstract: A tunnel excavation device includes a main body a frame and a workbench. The main body includes a front body section and a rear body section. The front body section includes a cutter head provided with a plurality of disk cutters. The rear body section is disposed behind the front body section and includes a gripper section for obtaining a reaction force when excavating. The frame is disposed continuously behind the main body. The workbench is disposed above the frame so as to be rotatable with respect to the frame.

Abstract: An oil filter device includes: a filter case including a case body and a lid, the lid configured to cover a case opening provided in the case body; a filter an element disposed in a main passage provided in an internal a space of the filter a case; a conductive valve body having conductivity and disposed in a bypass passage provided in the internal space; a valve conductive shaft having conductivity and supported by the valve body via a valve an insulating member; a valve conductive disc having conductivity and movably supported by the valve shaft and configured to close closing the bypass passage by coming into contact contacting with the valve body; a valve an elastic member that generates generating an elastic force to bring the valve disc into contact with the valve body; an a conductive input member having conductivity and supported by the lid via the case insulating member; a conductive relay elastic member having conductivity and connected to the input member; a conductive relay member having conductiv