Short-Time Behaviour in Pulsed Eddy-Current Nondestructive Evaluation

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1999
Authors
Burke, S.
Hugo, G.
Moulder, John
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

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Abstract

The resurgence of interest in pulsed eddy-current nondestructive evaluation (NDE) is motivated by the ability of the technique to detect deeply-buried defects in multi-layer aircraft structures and to obtain broad-band frequency information [1–4]. In this sense, the pulsed technique is a natural extension of dual- and multi-frequency eddy-current techniques. However, unlike conventional eddy-current NDE, for which the effects of coil lift-off variation can be readily discriminated using phase plane analysis, the most appropriate method for dealing with variation in coil lift-off in pulsed eddy-current NDE remains an open question. Clearly, a first step in the development of algorithms for lift-off compensation is to construct a method to determine the coil lift-off from measurements of the coil response, independent of other variations.

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Fri Jan 01 00:00:00 UTC 1999