POSITION DETECTION SENSOR, POSITION DETECTION SYSTEM USING SAID POSITION DETECTION SENSOR, AND BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION PROVIDED WITH SAID POSITION DETECTION SENSOR

WIPO Patent Application WO/2017/191709

A1

Provided are a small position detection sensor, a position detection system that uses said position detection sensor, and a belt-type continuously variable transmission provided with said position detection sensor, which enable the accurate detection of a position in the movement direction of a target (9), even if the target is displaced (juddered) in a direction perpendicular to the movement direction. The target (9) has a second member (4) that is less magnetic than a first member (3) and is positioned on the outer surface of the first member (3). At least one of the outer surface of the first member (3) and the outer surface of the second member (4) is sloped with respect to a prescribed direction, or formed in a stepped configuration along the prescribed direction. There are a plurality of coils (7, 8) positioned so as to face the outer surface of the second member (4) of the target (9) and driven at different frequencies. The position of the target (9) is detected using the change in impedance of the plurality of coils (7, 8) when a body to be detected moves.

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KATO TAKESHI (JP)
TAKAHASHI TSUKASA (JP)
GORAI NOBUAKI (JP)

PCT/JP2017/009647

November 09, 2017

March 10, 2017

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

G01B7/00; G01D5/20

JPS59125002A	1984-07-19
JP2014153325A	2014-08-25
JPS5478165A	1979-06-22
JP2010249263A	2010-11-04
US20100301840A1	2010-12-02

TODA Yuji (JP)

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