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Pulsed eddy current non-destructive evaluation based on coupled electromagnetic quantities method

Published online by Cambridge University Press:  28 November 2011

A. Bouzidi ,
B. Maouche ,
M. Feliachi  and
G. Berthiau
A. Bouzidi*
Affiliation:
Laboratoire de Génie Électrique (LGE), Université A. Mira, route de Mezaia-Targa-Ouzamour, 6000 Bejaϊa, Algeria
B. Maouche
Affiliation:
Laboratoire de Génie Électrique (LGE), Université A. Mira, route de Mezaia-Targa-Ouzamour, 6000 Bejaϊa, Algeria
M. Feliachi
Affiliation:
IREENA-IUT, CRTT, University Boulevard, BP 406, 44602 Saint-Nazaire Cedex, France
G. Berthiau
Affiliation:
IREENA-IUT, CRTT, University Boulevard, BP 406, 44602 Saint-Nazaire Cedex, France
*
ae-mail: athmane_bouzidi@yahoo.fr
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Abstract

This paper proposes a semi-analytical model for Pulsed Eddy Current Non-Destructive Evaluation (PEC-NDE) based on the Coupled Electromagnetic Quantities Method (CEQM). The proposed formulation is developed from coupled electric circuit’s approach in which the Crank Nicholson formula is used to derive the transient behavior. The computational model makes use of current excitation allowing the determination of the sensor voltage in the case of an axisymmetric device. The feature of the variation of voltage provides information on the electromagnetic and geometrical properties of the device. So, the second peak of voltage variation (SPVV) and second ratio between the minimum and maximum (RMM2) are used to determine these properties. The proposed model is validated by comparison with Fourier reconstitution obtained from measurements on one hand and with finite element calculations on the other hand. The developed model, associated to an inversion technique, is applied to evaluate the lift-off and the work piece thickness.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 57 , Issue 1 , January 2012 , 10601
Copyright
© EDP Sciences, 2011

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