Caterpillar SARL

A work machine comprising a trench measurement system for measuring a trench depth and trench angle during a trench digging operation is disclosed. The work machine comprises a range finder system mounted on the boom and includes a plurality of rangefinders, each rangefinder includes a beam device configured to determine a distance of a plurality of rays irradiated from the beam device to a trench floor. An on-board controller is configured to calculate the trench depth from data received by the range finder system on the boom, the sensor assembly, the boom position on the working mechanism, and attributes of the work machine. A method for measuring a trench depth and trench angle associated with a trench digging operation with range finders mounted on the boom of a work machine is also disclosed.

The present disclosure is generally directed towards a machine requiring separate control of a swing function, travel function and implements. The machine comprises a swing-travel hydraulic system for controlling swing and travel motor arrangements in closed loop circuits with a swing-travel pump arrangement. The machine may further comprise a separate implement hydraulic system operating an implement motor arrangement in an open loop circuit.

To provide a construction machine capable of preventing damages of batteries placed on a machine-body frame. A construction machine comprises a machine-body frame, a supporting plate installed on the machine-body frame via elastic mounts, and batteries fixed to a topside of the supporting plate. Welding is not performed on the supporting plate.

PURPOSE: To control crane operation in safety and high working efficiency by limiting upper limit value of swing angle speed automatically, corresponding to a working radius calculated from the length and angle of a boom and a load factor of a crane. CONSTITUTION: A working radius R is searched from a boom angle beta and a boom length L detected with detectors 1, 2, with a computing element 3, and an allowable maximum swing angle speed omegamax is computed by a first function generating means 7. Meanwhile, from a cane load W detected with a detector 4, working radius R, and boom length L, a rated value Wa with a computing element 5, moreover a load factor P with a dividing apparatus 6 are searched, and a decreasing factor of swing angle speed K is calculated with a second function generating means 8. omegamax.K is searched with a multiplicator 9, and output as a control signal which sets it as the upper limit value of swing angle speed, to a swing driving mechanism A. Hereby, the swing angle speed corresponding to various working radii and load factors are obtained. The maximum swing angle speed is limited according to the working condition, and controlling of crane operation can be performed in safety and high working efficiency.

A work machine can comprise a work tool attached to an end of a boom of the work machine, and processing circuitry. The processing circuitry can be configured to determine a type of the work tool; set a focus point of the work tool based on the type of the work tool; measure a posture of the work tool based on the focus point; and provide a guidance function to an operator of the work machine in accordance with the measured posture of the work tool based on the focus point.

A method of operating a work vehicle is provided. The work vehicle comprises a swing apparatus rotatable about a swing axis. The swing apparatus comprises an arm arrangement comprising a boom and a stick, a boom actuator for controlling the boom, and at least one boom head pressure sensor for generating boom head pressure data indicative of a boom head pressure of the boom actuator. The method comprises, by a control system, determining a maximum allowable swing speed of the swing apparatus rotating about the swing axis, to account for the moment of inertia of the swing apparatus, based on boom head pressure data and a map linking boom head pressure data with the maximum allowable swing speed. The method further comprises limiting a maximum operational swing speed of the swing apparatus to the maximum allowable swing speed.

To reduce the burden of an operator when performing a task for identifying which posture information detection sensor is mounted on which front member in a construction machine where the posture information detection sensors are mounted on multiple front members constituting a working machine. An automatic identification system is provided which has an identification task start button for being operated to start an identification task, a front member control means for outputting a control instruction for driving and stopping multiple front members sequentially, individually, and automatically, and a sensor identification means for identifying IMU mounted on each front member based on changes of a detection value of IMU as said each front member is driven by the front member control means.

A work machine can include a frame; transportation devices coupled to the frame; a work tool coupled to the frame; a hydraulic system to provide power to operate the transportation devices and the work tool; and a controller configured to operate in a first mode wherein a first hydraulic pump is configured to deliver hydraulic fluid to the transportation devices and a second hydraulic pump is configured to deliver hydraulic fluid to the work tool, and wherein the controller can operate in a second mode wherein the work tool is provided with hydraulic fluid from both the first and the second hydraulic pumps.

A work machine includes a frame, a linkage assembly, a work implement connected to the linkage assembly, and a grade control calibration system. The grade control calibration system includes a vision processing system, which includes a sensor fixed to the linkage assembly and a first controller. The vision processing system is configured to measure a length of a cutting portion of the work implement, and to transmit the length of the cutting portion of the work implement. The grade control calibration system also includes a grade control system in communication with the vision processing system and the linkage assembly. The grade control system includes a second controller configured to receive the length of the cutting portion of the work implement from the first controller, and to calibrate a position of the work implement based on the received length of the cutting portion of the work implement.

A work machine comprises a bucket attached to an end of a stick of the work machine as a work tool, a thumb pivotally coupled to the end of the stick, and processing circuitry. The processing circuitry is configured to determine a current task of the work machine among scooping an object by the bucket or grabbing the object by the bucket and the thumb, based on an angle of the bucket, and calculate payload with a parameter of a center of gravity position of the payload based on the determined current task.