| 摘要 |
A wheel slip detecting system that operates an anti-lock brake system by detecting the wheel slip includes a tone wheel comprising a metallic ring body, perforations and imperforations that are formed at a constant interval on a flat plate of the ring body, and a flange that is extendedly formed by bending the circumferential surface of the ring body. A detector detects the perforations and the imperforations of the wheel when the tone wheel rotates. A controller controls the operation of the anti-lock brake system on the basis of the detected result of the detector. The tone wheel, thus constructed, is protected from damage upon an exterior impact while effectively reducing in manufacturing costs and weight thereof.
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