Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 1998.10a
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- Pages.613-616
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- 1998
A Study on Eddy-current Probe with Ferrite Cores over a Layered Half-Space
레이어가 있는 하프스페이스에서 페라이트코아가 있는 와류탐침에 대한 연구
- Kim, T.W. (Chung-Ang Univ.) ;
- Byun, K.R. (Chung-Ang Univ.) ;
- Choi, J.H. (Chung-Ang Univ.) ;
- Kang, E.S. (Chung-Ang Univ.) ;
- Hwang, H.J. (Chung-Ang Univ.)
- Published : 1998.10.01
Abstract
In this paper, a model of a Eddy-current probe coil with a ferrite core in the presence of a half-space with a layer is developed. The half-space with a layer is accounted for by computing the appropriate Green's function by using Bessel transforms. Upon introducing equivalent Amperian currents within a core to explain effect to a impedance change in the coil due to a (ferrite) core, we derive a volume integral equation, The integral equation is transformed via the method of moments into a vector-matrix equation, which is then solved using a linear equation solver. Through the above processing, we computed impedance value in a Eddy-current probe coil due to a conductivity change of layer.
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