Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Development of Fiber-Optic AE Sensor for On-Line Monitoring System

광섬유를 이용한 상시감시 시스템용 음향방출센서의 개발

  • Nam, Jae-Yeong (Dept.of Mechanical Engineering, Graduate School of Sungkyunkwan University) ;
  • Jeong, Jae-Hyeon (Dept.of Mechanical Engineering, Graduate School of Sungkyunkwan University) ;
  • Choe, Jae-Bung (Dept.of Mechanical Engineering, Graduate School of Sungkyunkwan University) ;
  • Kim, Yeong-Jin
  • 남재영 (성균관대학교 대학원 기계공학과) ;
  • 정재현 (성균관대학교 대학원 기계공학과) ;
  • 최재붕 (성균관대학교 대학원 기계공학과) ;
  • 김영진
  • Published : 2000.12.01
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Abstract

The objective of this paper is to develop a fiber-optic acoustic emission(AE) sensor applicable to on-line monitoring systems which is suitable for long-distance signal transmission. An AE sensor was developed by use of a fiber-optic cantilever and an extrinsic Fabry-Perot interferometer(EEPI). The efficiency of signal processing was improved by driving the high frequency AE signals into the low frequency ones. In order to verify the developed sensor, the tensile and the pencil lead fracture(PLF) tests were performed including the experiment showing the Kaiser effect. Form tests, AE signals were successfully detected in the elastic-plastic deformation range, especially higher signals at the crack propagation. The developed sensor was expected to be used for an on-line monitoring of crack propagation in mechanical system.

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References

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