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

The Korean Society of Mechanical Engineers (대한기계학회)
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Structural strain measurement using a 3*3 passive demodulated fiber optic michelson interferometric sensor

3*3 수동변조 되풀이 광섬유 마이켈슨 간섭센서에 의한 구조물의 변형률 측정

  • Gwon, Il-Beom (Korea Reserch Institute of Standards and Science) ;
  • Gang, Hyeon-Gyu (Dept. of Aerospace Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Cheon-Gon (Dept. of Aerospace Engineering, Korea Advanced Institute of Science and Technology) ;
  • Hong, Chang-Seon (Dept. of Aerospace Engineering, Korea Advanced Institute of Science and Technology)
  • 권일범 (한국표준과학연구원 방재기술연구센터) ;
  • 강현규 (한국과학기술원 항공우주공학과) ;
  • 김천곤 (한국과학기술원 항공우주공학과) ;
  • 홍창선 (한국과학기술원 항공우주공학과)
  • Published : 1998.01.01
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Abstract

The measuring method of structural strain by a 3*3 passive-demodulated fiber optic interferometric sensor was developed to implement the real-time monitoring of structural status. A 3*3 fiber optic Michelson interferometric sensor was constructed to sense the value and the direction of structural strain. This sensor was applied on the cantilevered aluminum beam to experiment the sensing of the structural deformation. The digital signal processing was programmed by LabVIEW to determine the structural strain from the fiber optic signals. This program was verified by various simulated fiber optic signals. Finally, the structural was well determined by this developed program from real fiber optic signals.

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