Electromagnetic inspection technique of thickness of nickel-layer on steel plate without influence of lift-off between steel and inspection probe

Author

Gotoh, Y. ; Matsuoka, A. ; Takahashi, N.

Author_Institution

Dept. of Mech. Energy Syst. Eng., Oita Univ., Oita, Japan

fYear

2010

fDate

9-12 May 2010

Firstpage

1

Lastpage

1

Abstract

There is a need to inspect thickness of a nickel layer of nickel-coated steel plate in the production process to guarantee the quality. The conductivity of a nickel layer in the nickel-coated steel is larger than that of mother steel, and its permeability is smaller than that of mother steel. Therefore, the estimation of thickness of the nickel-layer is possible by using differences of these electromagnetic properties. However, the signal is also influenced by the change of distance (lift-off) between the nickel-coated steel and an electromagnetic sensor. In this paper, the inspection method for measuring the thickness of nickel layer taking account of the lift-off is proposed using the 3-D edge-based hexahedral nonlinear FEM.

Keywords

electromagnetic devices; electromagnetic waves; finite element analysis; inspection; nickel; plates (structures); quality assurance; steel; 3D edge-based hexahedral nonlinear FEM; electromagnetic inspection technique; electromagnetic sensor; inspection probe; lift-off; mother steel; nickel-coated steel plate; nickel-layer thickness; permeability; production process; quality guarantee; thickness estimation; Coils; Conductivity; Inspection; Interpolation; Nickel; Permeability; Power engineering and energy; Probes; Steel; Thickness measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Field Computation (CEFC), 2010 14th Biennial IEEE Conference on

Conference_Location

Chicago, IL

Print_ISBN

978-1-4244-7059-4

Type

conf

DOI

10.1109/CEFC.2010.5481872

Filename

5481872