Patent ID: 7292925

Claim:
An acceleration estimation device for estimating acceleration of a vehicle, comprising: a first acceleration sensor arranged to detect an acceleration in a forward-and-backward direction of the vehicle; a second acceleration sensor arranged to detect an acceleration in an up-and-down direction of the vehicle; a wheel speed detector arranged to detect a wheel speed of the vehicle; an offset estimator arranged to estimate offset in the first acceleration sensor and offset in the second acceleration sensor using a relationship among a detected value in the first acceleration sensor, a detected value in the second acceleration sensor, and a detected value in the wheel speed detector when the vehicle is at a substantially constant speed; and a corrector arranged to correct the detected value in the first acceleration sensor and the detected value in the second acceleration sensor on the basis of an estimated value of the offset in the first acceleration sensor and an estimated value of the offset in the second acceleration sensor that are obtained by the offset estimator when the vehicle is accelerated or decelerated.