한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

  • 제16권12호
  • /
  • Pages.1224-1230
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  • 2006
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  • 1598-2785(pISSN)
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  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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시간-주파수 기법을 이용한 배관 감육 감시 방법

Monitoring Pipe Thinning Using Time-frequency Analysis

  • 손창호 (울산대학교 컴퓨터정보통신공학부) ;
  • 박진호 (한국원자력연구소 기계공학연구부) ;
  • 윤두병 (한국원자력연구소 기계공학연구부) ;
  • 정의필 (울산대학교 컴퓨터정보통신공학부) ;
  • 최영철 (한국원자력연구소 기계공학연구부)
  • 발행 : 2006.12.20
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초록

Pipe thinning is one of the major issues for the structural fracture of pipes of nuclear power plants. Therefore a method to inspect a large area of piping systems quickly and accurately is needed. In this paper, we proposed the method for monitoring pipe thinning. Our basic idea come from that a group velocity of impact wave is different as wall thickness. If the group velocity is measured, wall thickness can be estimated. To obtain the group velocity, time -frequency analysis is used. This is because an arrival time difference can be measured easily in time-frequency domain rather than time domain. To test the performance of this technique, experiments have been performed for a plate and U type pipe. Results show that the proposed technique is quite powerful in the monitoring pipe thinning.

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참고문헌

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