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Impedance characteristics analysis of the non‐contact magnetic type position sensor
Author(s) -
Yang Seungho,
Hirata Katsuhiro,
Ota Tomohiro,
Mitsutake Yoshio,
Kawase Yoshihiro
Publication year - 2011
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.10302
Subject(s) - electrical impedance , potentiometer , displacement (psychology) , permeability (electromagnetism) , position sensor , acoustics , materials science , position (finance) , finite element method , magnetic core , core (optical fiber) , electronic engineering , electrical engineering , electromagnetic coil , nuclear magnetic resonance , engineering , structural engineering , physics , composite material , chemistry , angular displacement , psychology , biochemistry , finance , voltage , membrane , economics , psychotherapist
The mechanical contact‐type potentiometer that has been conventionally used as a position sensor is known to have the problems of contact reliability and lifetime. Therefore, we have developed a noncontact linear position sensor using impedance change based on displacement. In this paper, we evaluate the AC magnetization characteristics of the core material used for such a sensor, and investigate how to use the complex magnetic permeability in three‐dimensional finite element analysis. In addition, the impedance characteristics of the noncontact magnetic position sensor are calculated using the measured complex magnetic permeability of the core. The validity of our method is verified by comparing the measurements of the prototype to calculated values. © 2011 Wiley Periodicals, Inc. Electron Comm Jpn, 94(3): 33–40, 2011; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/ecj.10302