Offset detecting device of acceleration sensor, offset detection program as well as the navigation device offset detection method and acceleration sensor of acceleration sensor

摘要

PROBLEM TO BE SOLVED: To highly accurately detect zero-gravity offset of acceleration sensors.;SOLUTION: When position information PS is acquired from a GPS processing part 4, a speed detection unit 2 highly accurately computes offset acceleration αo by calculations using: actually detected acceleration αGr actually acquired by an acceleration sensor 11; vehicle acceleration αP based on the position information PS; distance Dm; the amount of change Dh in altitude based on atmospheric pressure PR; and gravitational acceleration g, according to the expression (15), and also highly accurately converts acceleration detection signals SA into detection acceleration αG on the basis of a zero-gravity offset value Vzgo converted from the offset acceleration αo.;COPYRIGHT: (C)2007,JPO&INPIT