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Book: Studies in Applied Electromagnetics and Mechanics 14, Electromagnetic Nondestructive Evaluation (II), Editors: R. Albanese, G. Rubinacci, T. Takagi and S.S. Udpa, IOS Press, Amsterdam (1998), ISBN: 90-5199-375-7, pp.66-73

Performance Improvement in Eddy Current Testing via Phase Information

Vincenzo COCCORESE(1), Francesco Carlo MORABITO(1), Alessandro FORMISANO(2), Raffaele MARTONE(3)

(1) DIEMA, UniversitÓ degli Studi di Reggio Calabria, Loc. Feo di Vito, I-89100, Reggio Calabria, Italy
(2) Dipartimento di Ingegneria Industriale, UniversitÓ degli Studi di Cassino, Via De Biase 43, I-03043 Cassino (FR), Italy
(3) Dipartimento di Ingegneria dell'Informazione, Seconda Univ. degli Studi di Napoli, Via Roma 29, I-81031 Aversa (CE), Italy

The paper deals with data processing in a sample case of Eddy Current Testing in a conducting body. The eddy current pattern is computed and used as a data set to detect the presence and shape of possible defects. The paper aims in particular to assess the potential advantages one can achieve when the signal processing includes not only the amplitude but also the phase delay angle. It is shown how a hybrid neuro-fuzzy processor is well suited for this kind of investigation. Results are given in terms of accuracy of the reconstruction of the geometric parameters of the defects.

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