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Received: 2008-05-09

Revision Accepted: 2008-09-05

Crosschecked: 2009-04-27

Cited: 6

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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.7 P.1029~1037

10.1631/jzus.A0820358


Characteristics analysis and parameters optimization for the grating eddy current displacement sensor


Author(s):  Hong-li QI, Hui ZHAO, Wei-wen LIU

Affiliation(s):  Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding email(s):   huizhao@sjtu.edu.cn

Key Words:  Grating eddy current displacement sensor (GECDS), Watertight electronic calipers, Parameters optimization, Nonlinearity


Hong-li QI, Hui ZHAO, Wei-wen LIU. Characteristics analysis and parameters optimization for the grating eddy current displacement sensor[J]. Journal of Zhejiang University Science A, 2009, 10(7): 1029~1037.

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author="Hong-li QI, Hui ZHAO, Wei-wen LIU",
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DOI - 10.1631/jzus.A0820358


Abstract: 
The grating eddy current displacement sensor (GECDS) for distance or position measurement used in watertight electronic calipers was described. The sensor relies on repetitive variation of inductance against displacement caused by the change of coupling areas between moving coils and static reflectors. The investigations focused on setting up and utilizing a computer model of the 3D eddy current fields and geometry to analyze causes of the production of measurement blind areas, and to investigate effects of the sensor parameters, such as axial gap between coils and reflectors, reflector length and reflector width on characteristics of the sensor. Simulation results indicated that the sensor has the smallest nonlinearity error of 0.15%, which agrees well with the experimental results.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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