WIT Press


BEM Analysis Of Eddy Current Thickness Sensor

Price

Free (open access)

Paper DOI

10.2495/BE960141

Volume

14

Pages

10

Published

1996

Size

813 kb

Author(s)

K. Amaya, M. Uragou & S. Aoki

Abstract

An electro-magnetic field of an eddy current thickness sensor was analyzed for the purpose of improving measurement accuracy. Maxwell equations were discretized with the boundary element method. In order to facilitate the calculation, a quasi-static approximation and an axial symmetric ap- proximation were employed. A numerical integration formula with high accuracy was applied to evaluate a singular integral. A special element was developed for effective analysis of a thin film. It is found from numerical results that the radial component of magnetic flux density produced by the eddy current is greater than the axial componen

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