Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Detection of Defects Using AC Current -The Effect of Frequency and Lift-off-

교류전류를 이용한 결함탐상에 관한 연구 - 주파수와 Lift-off 효과 -

  • 김훈 (여수대학교 기계.자동차공학부) ;
  • 김정엽 (여수대학교 기계.자동차공학부) ;
  • 문봉호 (여수대학교 기계.자동차공학부)
  • Published : 2001.06.27
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Abstract

NDI technique system using AC current is newly developed for inspection of defects. This technique is non-contact measurement system and can be applied for locating and sizing of surface defects in components. In this paper, the technique was applied for evaluating the location and size for 2-dimensional surface cracks and we had investigated the influence of frequency and lift-off. The results show that defects are able to detect with the variety of voltage, and the measuring voltage for the depth of defects are under the influence of the measuring frequency and the lift-off.

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