COMPUTER MODELLING AND DESIGN OF CAPACITIVE SENSORS

S. H. Khan, K. T. V. Grattan, L. Finkelstein

Abstract

This paper presents the use of numerical finite element (FE) technique for modelling and design of capacitive sensors. The general mathematical approach to FE modelling and design of capacitive sensors is established. Two case studies are considered to show the versatility and efficiency of the developed modelling methodologies. The first involves a multielectrode capacitive sensor for two-phase flow imaging and the second – a robust capacitive angular position sensor. It is shown that although these sensors are used in very different applications, the same modelling strategies are applicable to both cases. Results are presented in terms of sensor performance characteristics for various design parameters and operational regimes. Modelling results are compared with experimental data to validate the adopted modelling strategies.

Keywords

capacitive sensors, Finite Element Modelling, sensor design

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IMEKO-WC-2000-TC7-P187.pdf

DOI

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IMEKO TC

TC7 - Measurement Science

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