Eddy-Current Flaw Reconstruction by Inverting Field Data

Date
1989
Authors
Travis, C.
Bowler, John
Bowler, John
Jones, M.
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Altmetrics
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Abstract

In eddy-current reconstruction the aim is to approach a full characterisation of defects using either probe responses or electromagnetic field data to infer the flaw geometry. The process of inverting the data is inherently ill-conditioned therefore a good deal of care is needed in designing an algorithm giving stable results in the presence of noise[1]. We have developed a new general purpose numerical inversion method, applicable to a wide range of problems in nondestructive evaluation and to eddy-current flaw reconstruction in particular. Here we shall apply the procedure to solve an inverse source problem in eddy-current testing, using limited a priori knowledge of the flaw to ensure that the source distribution is uniquely defined.

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