3-D finite-element analysis of eddy-current evaluation of curved plates

Author

Le Bihan, Yann

Author_Institution

Lab. d´´Electricite Signaux et Robotique, Ecole Normale Supdrieure de Cachan, France

Volume

38

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

1161

Lastpage

1164

Abstract

The eddy current method allows thickness evaluation of conductive plates. However, EC measurements are sensitive to multiple parameters such as the sensor liftoff and the plate curvature. In this paper, the plate curvature effect is studied using a three-dimensional finite-element method, and it is shown that the curvature effect cannot be corrected by a conventional liftoff effect correction. Consequently the curvature effect has to be specifically corrected in the measurement inversion. A correction method using bifrequency measurements is implemented

Keywords

conducting bodies; eddy current testing; electrical engineering computing; finite element analysis; inverse problems; magnetic flux; neural nets; thickness measurement; 3-D finite-element analysis; bifrequency measurements; curvature effect correction method; curved conductive plates; eddy-current testing; hollow turbine blades; measurement inversion; neural network; plate curvature; sensor impedance; sensor liftoff; thickness evaluation; three-dimensional finite-element method; Blades; Coils; Conducting materials; Finite element methods; Impedance; Iron; Magnetic flux; Magnetic sensors; Thickness measurement; Turbines;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.996297

Filename

996297