| 摘要 |
PURPOSE:To correct the output of a steering angle sensor by comparing an accurate course angle found from the road shape at a vehicle passage point with the output steering angle of the steering angle sensor and correcting a correction coefficient required for the output correction of the steering angle sensor. CONSTITUTION:When steering operation is performed exceeding a preset steering angle, an on-vehicle navigation system 21 compares the accurate course angle thetaa found from the road shape at the vehicle passage point with the output steering angle of the steering angle sensor 2 to correct the correction coefficient required for the output correction of the steering angle sensor 2 and uses the corrected correction coefficient to correct the output of the steering angle sensor. Consequently, when the vehicle turns a corner at a relatively large steering angle, the correction coefficient required for the output correction of the steering angle sensor 2 can be corrected according to the course angle thetaa found from road map data recorded on a map information recording medium 6. |
