| 摘要 |
PURPOSE: A wheel speed detecting device heightens the frequency of wheel speed detecting signal. CONSTITUTION: A wheel speed detecting device comprises multiple reflecting members(50) and a wheel speed sensor(60). The reflecting members(50) are installed on a wheel hub assembly with certain gap between on the circumferential direction. The wheel speed sensor(60) comprises a radiating part, a light-receiving part and a signal processing part to radiate light on the surface of the wheel hub assembly where the reflecting members(50) are installed and receive light reflected by the reflecting members(50) to generate wheel speed detecting signals of frequencies corresponding with the period of receiving light. The signal processing part converts the analogue wheel speed detecting signal generated by the light-receiving part to digital wheel speed detecting signal. As the size of the reflecting members(50) and the gaps between the reflecting members(50) can be small, the frequency of the wheel speed detecting signal can be higher than of a usual ABS(Anti-lock Brake System).
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