An interdigital capacitive sensor for quantitative characterization of wire insulation

Date
2012-07-01
Authors
Sheldon, Robert
Bowler, Nicola
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Research Projects
Organizational Units
Journal Issue
Series
Abstract

An interdigital capacitive sensor has been developed to characterize the permittivity of wire insulation. A theoretical model has been developed to calculate the capacitance of such a sensor that is in intimate contact with the surface of a double-layer cylindrical dielectric surrounding a conductive core. The cylindrical form of the electrostatic Green’s function due to an exterior point source is utilized, with the final capacitance value being calculated using the Method of Moments. Example calculations are performed and a field optimization method is developed to improve the sensing efficiency of the electrodes.

Description

Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

This article appeared in AIP Conference Proceedings 1511 (2012): 1578–1585 and may be found at http://dx.doi.org/10.1063/1.4789230.

Keywords
capacitive sensors, electrodes, Green's function methods, method of moments, optimisation, nondestructive evaluation, Electrical and Computer Engineering, QNDE
Citation
DOI
Source