1. The ring wheel speed sensor is mainly composed of permanent magnets, induction coils and ring gears. The permanent magnet is composed of several pairs of magnetic poles. During the rotation of the ring gear, the magnetic flux inside the induction coil alternately generates induced electromotive force. This signal is input to the ABS electronic control unit through the cable at the end of the induction coil. When the speed of the ring gear changes, the frequency of the induced electromotive force also changes.
2. When the gear of the Hall-type wheel speed sensor rotates, the density of the magnetic force passing through the Hall element changes, which causes the change of the Hall voltage. The Hall element will output a millivolt (mV)-level quasi-sine wave voltage. This signal also needs to be converted into a standard pulse voltage by an electronic circuit.
3. The linear wheel speed sensor is mainly composed of permanent magnets, pole shafts, induction coils and ring gears. When the ring gear rotates, the tooth tip and the tooth gap alternately oppose the polar axis. During the rotation of the ring gear, the magnetic flux inside the induction coil alternately generates an induced electromotive force. This signal is input to the ABS electronic control unit through the cable at the end of the induction coil. When the speed of the ring gear changes, the frequency of the induced electromotive force also changes.
Post time: Nov-24-2021