Title :
Flaws characterization with pulsed eddy currents NDT
Author :
Clauzon, T. ; Thollon, F. ; Nicolas, A.
Author_Institution :
CEGELY, Ecole Centrale de Lyon, Ecully, France
fDate :
5/1/1999 12:00:00 AM
Abstract :
In this paper, we present a method for characterizing flaws in metallic structures with pulsed eddy current nondestructive testing (NDT). In a first step, we explain why we have chosen a deconvolution method based on conjugate gradient algorithm (CG). After a description of this method and the way it is used for characterization, a validation is performed by coupling it with a 2D FEM (2 dimensional finite elements method) package. The obtained results are compared with experimental measurements. In the last step, a parametric study on parameters obtained with the impulse response gives an estimation of the dimensions of the flaw
Keywords :
conjugate gradient methods; deconvolution; eddy current testing; finite element analysis; flaw detection; transient response; 2 dimensional finite elements method; 2D FEM; conjugate gradient algorithm; deconvolution method; eddy current testing; flaw dimensions estimation; flaws characterisation; impulse response; metallic structures; pulsed eddy current nondestructive testing; pulsed eddy currents NDT; Assembly; Character generation; Convolution; Deconvolution; Eddy current testing; Eddy currents; Equations; Nondestructive testing; Packaging; Tellurium;
Journal_Title :
Magnetics, IEEE Transactions on
