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Electrostatic capacitive imaging : a new NDE technique

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Diamond, G. G., Hutchins, David A., Leong, Kennith Kin and Gan, T. H. (2007) Electrostatic capacitive imaging : a new NDE technique. In: 33rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Portland, Oregon, 30 Jul - 04 Aug 2006. Published in: Review of Progress in Quantitative Nondestructive Evaluation, Vols 26A and 26B, Volume 894 pp. 689-694. ISBN 9780735403994. doi:10.1063/1.2718037 ISSN 0094-243X.

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Official URL: http://dx.doi.org/10.1063/1.2718037

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Abstract

A new technique for NDE has been developed which is capable of imaging a wide range of materials and structures, ranging from insulators to metallic conductors. The approach, known as Capacitive Imaging (CI) uses electrode arrays in air to produce an AC electric field distribution within the material. Scanning the electrodes over the material causes a change in the field distribution, and hence changes in output voltage. Capacitive coupling allows the technique to work on a wide variety of material conductivities without some of the disadvantages associated with conventional eddy current and potential drop methods. Images are presented of carbon fibre composite materials, concrete and Plexiglas, illustrating the range of application in NDE. The effect of electrode shape and excitation frequency will be discussed in terms of image resolution and depth of penetration.

Item Type: Conference Item (Paper)
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Series Name: AIP Conference Proceedings
Journal or Publication Title: Review of Progress in Quantitative Nondestructive Evaluation, Vols 26A and 26B
Publisher: American Institute of Physics
ISBN: 9780735403994
ISSN: 0094-243X
Book Title: AIP Conference Proceedings
Editor: Thompson, D. O. and Chimenti, D. E.
Official Date: 2007
Dates:
DateEvent
2007Published
Volume: Volume 894
Number of Pages: 6
Page Range: pp. 689-694
DOI: 10.1063/1.2718037
Status: Peer Reviewed
Publication Status: Published
Conference Paper Type: Paper
Title of Event: 33rd Annual Review of Progress in Quantitative Nondestructive Evaluation
Type of Event: Other
Location of Event: Portland, Oregon
Date(s) of Event: 30 Jul - 04 Aug 2006

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