APPARATUS FOR NON-POLARITY CORRECTION AND DISPLACEMENT MEASUREMENT OF OBJECT USING SEARCH COIL TYPE SENSOR

WIPO Patent Application WO/2021/210830

A1

An embodiment of the present invention provides a technology for preventing a sensing delay resulting from the range in which an electric field momentarily subsides (non-polar range) when polarity changes according to a displacement of an object containing iron, and measuring the location, dislocation, or the like of the object containing iron. An apparatus for non-polarity correction and displacement measurement of an object using a search coil type sensor, according to an embodiment of the present invention, comprises a plurality of sensors each provided with a housing, a core formed to be inserted into the inner space of the housing, and a coil wound around an outer circumferential portion of the housing that corresponds to the location of the core, wherein the plurality of sensors are arranged parallel to each other, the locations of the core and wound coil with respect to one housing are different from the locations of the core and wound coil with respect to another housing, and an induced magnetic field may be formed by a change in distance from the object containing iron (Fe).

JP2012255682	DISPLACEMENT AMOUNT DETECTION APPARATUS
WO/2001/092817	NON-CONTACT POSITION SENSING APPARATUS
WO/2014/091032	MAGNETOELECTRONIC ANGLE SENSOR HAVING FOUR RETENTION DEVICES

CHOI JAE HUN (KR)
KIM TAE KYUN (KR)
KIM DONG HYUNG (KR)

PCT/KR2021/004220

October 21, 2021

April 05, 2021

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CHOI JAE HUN (KR)
KIM TAE KYUN (KR)

G01D5/20; G05D1/02

KR100925259B1	2009-11-05
KR20160102780A	2016-08-31
JPH05232087A	1993-09-07
KR200314113Y1	2003-05-22
KR101486193B1	2015-01-28
KR102204165B1	2021-01-19

HAN, Sang Soo (KR)

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