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Exploring the Eddy Current Excitation Invariance to Infer about Defect Characteristics

Ramos, H. ; Ribeiro, A. L.

Review of Progress in Quantitative Nondestructive Evaluation Vol. 1335, Nº 1, pp. 575 - 580, June, 2011.

ISSN (print): 0094-243X
ISSN (online): 978-0-7354-0888-3

Journal Impact Factor: (in 0)

Digital Object Identifier: 10.1063/1.3591902

This paper explores the excitation probe excitation field invariance when the eddy current method is applied to detect, localize and characterize material defects in conductive nonmagnetic media. The cases relative to rotational symmetry in circular solenoidal probes and translation symmetry in constant field probes are presented. The experimental data shows that this theoretical treatment is useful to preview the behavior of these probes.