| 摘要 |
Minimum and maximum values of an angular velocity signal output from a gyro while a vehicle is stationary are detected. A range of the angular velocity signal is set that is used to determine when the vehicle is stationary. When the angular velocity signal output from the gyro exceeds the range, the vehicle starts to move, offset values calculated within a set time from a movement start detection time are discarded, and an average angular velocity signal having been calculated and stored the set time before, is output as the offset value. Thus, even when the vehicle does not have a vehicle speed sensor, the stopping and starting of the movement of the vehicle can be accurately detected using the output signal from the gyro and the accurate offset value can be output.
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