ROTATION DETECTOR

WIPO Patent Application WO/2016/190040

A1

[Problem] To provide a rotation detector that can detect a rotation angle with accuracy even when an abnormality occurs in magnetic element units. [Solution] A rotation detector 1 is provided with a magnetism detecting unit 20 that detects magnetism generated by a magnet 10, and a calculating unit 50 that calculates a rotation angle of a rotating body on the basis of detection signals Sa outputted by the magnetism detecting unit 20. The magnetism detecting unit 20 has n magnetic element units 30, where n is 3 or more, and outputs, for the respective n magnetic element units 30, the detection signals Sa of different phases. The calculating unit 50 calculates the respective detection angles from the n types of detection signals Sa. When the calculated n types of detection angels include an abnormality detection angle which is a value different from the other detection angles by a degree exceeding an allowable range, the calculating unit 50 excludes, from the n types of detection signals Sa, an abnormality detection signal from which the abnormality detection angle is calculated, and calculates a rotation angle.

JP5097012	Signal processing circuit for encoder
JP2001153658	SETTING ANGLE ADJUSTING DEVICE FOR GYRO SENSOR

OKUMURA HIROFUMI (JP)
KOIKE FUMIHITO (JP)

PCT/JP2016/063172

December 01, 2016

April 27, 2016

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ALPS ELECTRIC CO LTD (JP)

G01D5/12; G01D5/16; G01D5/245

JP2008196938A	2008-08-28
JPH04131712A	1992-05-06
JP2005077227A	2005-03-24
JP2013250182A	2013-12-12
JP2005534199A	2005-11-10
JP2008534926A	2008-08-28

NOZAKI, Teruo (JP)
Teruo Nozaki (JP)

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