Location

La Jolla ,CA

Start Date

1-1-1989 12:00 AM

Description

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.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

8A

Chapter

Chapter 1: Fundamentals of Classic Techniques

Section

Eddy Currents

Pages

321-328

DOI

10.1007/978-1-4613-0817-1_41

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Eddy-Current Flaw Reconstruction by Inverting Field Data

La Jolla ,CA

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.