POSITION DETECTION DEVICE

WIPO Patent Application WO/2017/094828

A1

Provided is a position detection device that makes it possible to reduce the influence of temperature on a signal output from a magnetoresistive element when a magnetic scale is read. Specifically, a magnetic encoder device 1 (the position detection device) comprises a magnetic scale 2 and a magnetic sensor 3 that detects the position of the magnetic scale 2. The magnetic sensor 3 is provided with: a sensor substrate 12; a first magnetoresistive element 45 for magnetic field detection and a second magnetoresistive element 46 for magnetic field detection that read the magnetic scale 2 toward a magnetosensitive direction in a relative movement direction Z on the sensor substrate 12 and output a signal; and a first magnetoresistive element 51 for temperature correction and a second magnetoresistive element 52 for temperature correction that face the magnetosensitive direction in an orthogonal direction Y orthogonal to the relative movement direction Z on the sensor substrate 12. The magnetic sensor 3 corrects a differential signal D from the magnetoresistive elements 45, 46 for magnetic field detection by a differential signal (a midpoint voltage T for temperature correction) from the magnetoresistive elements 51, 52 for temperature correction.

YOKOUCHI TSUYOSHI (JP)
MOMOSE SHOGO (JP)

PCT/JP2016/085699

June 08, 2017

December 01, 2016

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NIDEC SANKYO CORP (JP)

G01D5/244; G01D5/245

JPH05231880A	1993-09-07
JPH01270613A	1989-10-27
JP2001133288A	2001-05-18
JPH0377015A	1991-04-02
JPH0526658A	1993-02-02
JPS639818A	1988-01-16
JP2009002702A	2009-01-08
JP2001264006A	2001-09-26

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