Patent ID: 7116095

Claim:
A wheel rotation detecting device, comprising: a rolling bearing unit including: a stationary ring supported on a suspension of a body and being unrotatable in use; a rotary ring supporting a wheel thereon and being rotatable with said wheel for moving the body in a traveling direction; and a plurality of rolling elements respectively rollably interposed between a stationary side raceway formed in a peripheral surface of said stationary ring and a rotary side raceway formed in a peripheral surface of said rotary ring; an encoder supported on said rotary ring or on a part mounted on said rotary ring and being rotatable with said rotary ring; a rotation detecting sensor supported on said stationary ring or a part mounted on said stationary ring in such a manner as to be opposed to said encoder, for detecting the rotation of said rotary ring; an acceleration sensor for detecting the vibration of said rolling bearing unit; and a control unit, wherein an acceleration or deceleration of the moving body is detected by the control unit on the basis of a signal of the acceleration sensor, and said acceleration sensor is one that detects vibration in a the traveling direction of the body.