The Transactions of the Korean Institute of Electrical Engineers D (대한전기학회논문지:시스템및제어부문D)

The Korean Institute of Electrical Engineers (대한전기학회)
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Magnetic Inspection using High-frequency Current Behaviors

고주파 전류의 특성과 자기 센서를 이용한 도체 결함 검사 방법

  • Im, Han-Sang (Dept.of Electronics Engineering, Seoul National University) ;
  • Park, Jae-Hong (Dept.of Electronics Engineering, Seoul National University)
  • Published : 2000.03.01
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Abstract

In this paper, an improved method for magnetic inspection to detect surface of a conductor is presented. The presented method is based on the technique of ECP(Electric Current Perturbation), which is to measure the variation of current flow due to defects with a magnetic sensor. The inspection performance is improved by using high frequency current behaviors in order to concentrate the current near the defect and employing the resonant frequency of a search coil as an operating frequency. By analytical results and experiments of the test specimens, the feasibility of the inspection method is shown.

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References

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