Analysis and Design of a Capacitive Sensor for Measuring Thickness

Jian Hua Lei

doi:10.4028/www.scientific.net/AMM.596.540

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 596Analysis and Design of a Capacitive Sensor for...

Analysis and Design of a Capacitive Sensor for Measuring Thickness

Abstract:

Parallel plate capacitance sensors have the advantage of low cost, fast dynamic response, and high resolution. However, edge effect severely limits their sensing accuracy. This paper designs a kind of parallel plate capacitance cylinder sensor with a metal protective ring which can significantly eliminate edge effect. Besides, simulation is shown using Ansys, a finite element software. The results indicate that, the curved field has turned into a vertical electric field because of the existence of the protective ring, and the edge effect has been eliminated.

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Periodical:

Applied Mechanics and Materials (Volume 596)

Pages:

540-543

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.596.540

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Online since:

July 2014

Authors:

Jian Hua Lei*

Keywords:

Edge Effect, Finite Element Simulation, Parallel Plate Capacitance, Sensor

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* - Corresponding Author

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