Patent ID: 8131418
Filing Date: 2012-03-06
Classification: B60W,G01C

Abstract:
1. An angular velocity calculating device operative to determine an offset value based on an angular velocity signal that is output from a gyro while a vehicle is stationary and to determine an angular velocity while the vehicle is moving based on the offset value, the angular velocity calculating device comprising: a stationary range determiner configured to detect a minimum value and a maximum value of an angular velocity signal for a predetermined period T a stopping/starting determiner configured to determine that the vehicle starts to move when the angular velocity signal from a gyro exceeds the range and to determine that the vehicle is stationary when the angular velocity signal from the gyro is within the range; an angular velocity averager configured to calculate an average angular velocity value based on the angular velocity signal output from the gyro at predetermined time intervals; an angular velocity storage configured to store the average angular velocity output from the angular velocity averager; and an offset value determiner configured to determine an offset value based on the angular velocity stored at a set time before the stopping/starting determiner detects that the vehicle starts to move.