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Fast analytical modelling for pulsed eddy current evaluation

Lookup NU author(s): Yong Li, Professor Gui Yun TianORCiD

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Abstract

Numerical simulations of electromagnetic non-destructive evaluation (ENDE) can be time-consuming in comparison to analytical methods which provide fast closed-form solutions to the ENDE problems. In this paper, the Truncated Region Eigenfunction Expansion (TREE) modelling is extended to solve problems of pulsed eddy current (PEC) evaluation from the traditional multifrequency eddy current. The Fourier transform is employed to make the TREE feasible for solutions to PEC problems in both time and frequency domains. Moreover, because PEC employs magnetic field sensors/arrays to quantify magnetic field, the magnetic field signals from solid-state magnetic field sensors have been simulated using the extended TREE. It has been found that the predicted signals using the extended TREE has good agreement with the experimental results. Consequently, the established model can not only offer an effective solution in terms of faster simulation time and higher computational accuracy, but also be used for PEC evaluation in industry and in the inverse process for exploring the structural and electrical information of stratified conductive specimens during real-time monitoring. © 2008 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Li Y, Tian GY, Simm A

Publication type: Article

Publication status: Published

Journal: NDT and E International

Year: 2008

Volume: 41

Issue: 6

Pages: 477-483

Print publication date: 01/09/2008

ISSN (print): 0963-8695

ISSN (electronic): 1879-1174

Publisher: Elsevier Ltd

URL: http://dx.doi.org/10.1016/j.ndteint.2008.02.001

DOI: 10.1016/j.ndteint.2008.02.001

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