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A search-based imaging system for electromagnetic nondestructive testing

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2 Author(s)
Udpa, L. ; Dept. of Electr. Eng., Colorado State Univ., Fort Collins, CO, USA ; Lord, W.

A crucial aspect of nondestructive-testing research is the inverse problem (or imaging), which involves the reconstruction of flaws in test specimen interiors, given a probe response signal. A novel approach that uses the finite-element model to solve the forward problem is presented. It is based on first formulating defect reconstruction as a parameter estimation problem. The test system functions as mathematical mapping from parameter space to signal space. The two major parts of the method are described: problem representation and the search procedure. Results obtained by applying the basic algorithm to defects simulated using the finite-element model are discussed.<>

Published in:

IEEE Expert  (Volume:4 ,  Issue: 4 )