Patent ID: 11906307
Assignee: AICHI STEEL CORPORATION
Field: Control (Instruments)
Classification: CPC G  B | IPC B  G

Claim 3:
4. A correction method for a gyro sensor which measures angular velocity of a vehicle about an axis in a vertical direction and outputs a sensor output indicating the angular velocity, the method comprising:
a generation process of obtaining correction information based on a difference between a measured azimuth obtained by using the angular velocity indicated by the sensor output and a vehicle azimuth estimated by using markers arranged along a traveling road of the vehicle; and
a correction process of correcting the angular velocity indicated by the sensor output or the measured azimuth by using the correction information, wherein:
the correction information is information indicating a temporal change of the difference,
the correction process is a process of correcting the sensor output or the measured azimuth with a correction amount based on the correction information,
the correction information includes at least a gradient a of a straight line approximating the temporal change of the difference, and
the correction process is a process of shifting the output from the gyro sensor by the correction amount corresponding to the gradient a.