Patent ID: 11926995
Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E  G | IPC E

Claim 0:
1. A work machine comprising:
a lift arm with a work implement capable of loading a load;
a hydraulic actuator configured to rotate the lift arm;
a hydraulic force detection unit configured to detect a hydraulic force of the hydraulic actuator;
an arm angle detection unit configured to detect a rotation angle of the lift arm; and
a controller configured to calculate a weight of the load,
wherein the controller is configured to:
measure the hydraulic force in a state where the rotation angle of the lift arm is within a predetermined measurement angle range,
calculate a change rate of the hydraulic force with respect to the rotation angle of the lift arm as a hydraulic force change rate, and then calculate a new hydraulic force change rate by dividing the hydraulic force change rate by an average hydraulic force within the predetermined measurement angle range, and
correct an error of the weight of the load occurring due to an inclination angle of a body on the basis of the new hydraulic force change rate.