US 12,092,494 B2
Apparatus for non-polarity correction and displacement measurement of object using search coil type sensor
Jae Hun Choi, Seoul (KR); Tae Kyun Kim, Guri-si (KR); and Dong Hyung Kim, Seoul (KR)
Assigned to Jae Hun Choi, Seoul (KR); and Tae Kyun Kim, Guri-si (KR)
Appl. No. 17/915,031
Filed by Jae Hun Choi, Seoul (KR); and Tae Kyun Kim, Guri-si (KR)
PCT Filed Apr. 5, 2021, PCT No. PCT/KR2021/004220
§ 371(c)(1), (2) Date Sep. 27, 2022,
PCT Pub. No. WO2021/210830, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 10-2020-0045110 (KR), filed on Apr. 14, 2020.
Prior Publication US 2023/0104078 A1, Apr. 6, 2023
Int. Cl. G01D 5/22 (2006.01); G01D 5/14 (2006.01); G01D 5/20 (2006.01)
CPC G01D 5/2216 (2013.01) [G01D 5/145 (2013.01); G01D 5/204 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An apparatus for correcting non-polarity and measuring displacement of an object containing iron (Fe) using a search-coil type sensor, the apparatus comprising:
a plurality of sensors, each having a housing having an inner space, a core disposed in the inner space of the housing, and a coil wound around a portion of an outer circumferential surface of the housing, the portion corresponding to a position of the core,
wherein the plurality of sensors are arranged in parallel with each other,
wherein a position of a core and a coil with respect to one housing differs from a position of a core and a coil with respect to another housing, and
wherein the apparatus is configured to have an induced magnetic field due to a distance change with respect to the object containing iron (Fe).