| 摘要 |
PURPOSE: A wheel speed sensing device for a vehicle is provided to properly give braking power by sensing the rotations per minute of a wheel. CONSTITUTION: A sensing unit includes a holder, a magnet(70), an IC chip(81), a hall IC sensor(80), and a cable. The holder has a magnet insertion groove. The magnet is inserted into the magnet insertion groove and generates magnetic filed change by the rotation of a tone wheel. An IC chip is arranged on the front of a holder to convert the magnetic file change of a magnet to an electric signal. A hall IC sensor includes two terminals connected to an IC chip. The cable electrically connects the hall IC sensor. A magnet has protrusions(75). The protrusions prevent the rotation of the magnet in the magnet insertion groove. |
