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

Claim 0:
1. 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:
generating a measured azimuth, which is a measurement value of a turning angle of the vehicle, by temporally integrating the angular velocity indicated by the sensor output;
a lateral shift amount detection process of detecting a lateral shift amount of the vehicle with respect to markers arranged along a traveling road of the vehicle;
an azimuth estimation process of estimating a vehicle azimuth by obtaining a shift angle of the vehicle with respect to a line segment connecting two of the markers by using the lateral shift amount of the vehicle with respect to two of the markers arranged along the traveling road;
a generation process of obtaining correction information based on a difference between the measured azimuth and the vehicle azimuth; and
a correction process of correcting the angular velocity indicated by the sensor output or the measured azimuth by using the correction information.