Patent ID: 11965319
Assignee: KOMATSU LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E  G

Claim 19:
20. A device for calibrating a work machine by using an external measurement apparatus, the work machine including a vehicle body, a work implement attached to the vehicle body, an attitude sensor that outputs attitude data indicative of an attitude of the vehicle body, and a positional sensor attached to the vehicle body, the device comprising:
an input device that receives an input of calibration data including
positions of at least two predetermined measurement points on the work machine measured by the external measurement apparatus, the at least two predetermined measurement points being spaced apart in a vehicle width direction of the work machine and the positions of the at least two predetermined measurement points being measured in an external coordinate system different from the vehicle body coordinate system, and
a position of the positional sensor in the external coordinate system measured by the external measurement apparatus; and

a processor configured to calibrate machine data indicative of the position of the positional sensor in a vehicle body coordinate system different from the external coordinate system, the processor calibrating the machine data by
calculating a deviation between an azimuth of the vehicle body coordinate system and an azimuth of the external coordinate system based on the at least two predetermined measurement points, and
calibrating the machine data based on the attitude data, the deviation, and the position of the positional sensor in the external coordinate system.