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ROTATION DETECTION DEVICE | ROTATIONSERKENNUNGSVORRICHTUNG | DISPOSITIF DE DÉTECTION DE ROTATION

Patentnummer:EP3211380B1
IPC Hauptklasse:G01D000514
Anmelder:
Erfinder:
Anmeldung:09.02.17
Offenlegung:10.02.16
Patenterteilung:15.07.20

Abstract / Hauptanspruch
A rotation detection device (6) includes a magnet (2) that forms a magnetic field toward a tooth surface of a gear (3); and a magnetic sensor (1) disposed between the magnet (2) and the gear (3). The magnetic sensor includes at least a pair of Hall elements that outputs signals according to a magnetic flux density in a circumferential direction of the gear (3); and a DSP that sets a first threshold B op on the basis of signals output from the Hall elements in the case in which the distance between the tooth surface of the gear (3) and the Hall elements is set as infinite, the DSP in the magnetic sensor (1) outputting a signal according to a rotation of the gear (3) on the basis of signals output from the Hall elements according to a variation in a magnetic flux density caused by the rotation of the gear (3) and the first threshold Bop. The rotation detection device that detects a rotation of a gear while preventing occurrence of false detection of a rotation state.

EP3211380B1


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