| 摘要 |
PROBLEM TO BE SOLVED: To precisely detect a zero point voltage of a vibration gyro sensor in any time under travel of a vehicle, in a technique as to an on vehicle navigation system. SOLUTION: A zero point voltage estimation part 7 finds a new zero point voltage, based on a correlation between an azimuth output value from a vibration gyro, and own vehicle positional information by a GPS. The own vehicle positional information therein is an angular velocity calculated by information received by the GPS, and a value of the new zero point voltage is calculated based on the angular velocities and the azimuth output values within the same time section where the angular velocity and the azimuth output value have the maximum correlation. More concretely, the zero point voltage is calculated based on respective average values and standard deviation values of the angular velocities and the azimuth output values. COPYRIGHT: (C)2008,JPO&INPIT |
