A passive wheel speed sensing circuit for sensing the vehicle speed of a commercial vehicle

摘要

The present invention senses that the wheel speed sensor output is not always the same due to the road surface condition, steering wheel operation, acceleration and deceleration, and senses the wheel speed of the wheels of a commercial vehicle, respectively, and then removes unnecessary noise to reduce the wheel speed. It relates to a wheel speed sensing circuit for sensing the vehicle speed of the commercial vehicle to be sensed without distortion or overlap, a plurality of wheel speed sensor (3) (4) (5) (6) for sensing the wheel speed of each wheel of a commercial vehicle, And wheel speed sensing circuits (7) (8) (9) (10) each processing the wheel speed detection signals sensed by the wheel speed sensors (3) (4) (5) (6). The two signal output lines of the wheel speed sensor 3, 4, 5, 6 are directly connected to the inputs of the wheel speed sensing circuits 7, 8, 9, 10, and are generated from a commercial vehicle. It is configured so that noise of various aspects is not introduced, and the two signal output lines apply a shield line that blocks external noise, but the shield line surrounding the two signal output lines is not a ground of a commercial vehicle, but a wheel speed sensing circuit. (7) (8) (9) (10) can be characterized in that each to be grounded.