Patent ID: 9644346
Date: 2017-05-09
CPC Classifications: E02F,G01B,G01S

Claim:
1. A calibration system for an excavator, comprising: the excavator that includes a chassis, an upper structure that is swingably attached to the chassis, a working machine that includes a boom rotatably attached to the upper structure, an arm rotatably attached to the boom, and a working tool rotatably attached to the arm, and a current position computation processor that computes a current position of a working point included in the working tool, based on a plurality of parameters indicating dimensions of the boom, the arm, and the working tool, a rotation angle of the boom with respect to the upper structure, a rotation angle of the arm with respect to the boom, and a rotation angle of the working tool with respect to the arm; a calibration device including a processor configured to calibrate the parameters; an external position measurement device that measures a position of the working point; and an inclination information detector to detect inclination information of the excavator in an anteroposterior direction of a vehicle body, wherein the processor of the calibration device corrects a plurality of positions of the working point measured by the external position measurement device, based on the inclination information of the excavator in the anteroposterior direction of the vehicle body detected by the inclination information detector, and computes calibrated values of the parameters based on coordinates of the working point at the plurality of corrected positions.