대한전자공학회논문지SD (Journal of the Institute of Electronics Engineers of Korea SD)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

코드분할 다중화 방식을 이용한 다중 광섬유 브래그 격자 센서 시스템

Multiple FBG Sensor System Using Code Division Multiple Access

  • 류형돈 (湖西大學校 電氣情報通信工學部 光通信硏究所) ;
  • 이호준 (湖西大學校 電氣情報通信工學部 光通信硏究所)
  • Ryu, Hyung-Don (Optical Comm. Lab., Dept. of Electric & Infor. Comm. Eng., Hoseo Univ.) ;
  • Lee, Ho-Joon (Optical Comm. Lab., Dept. of Electric & Infor. Comm. Eng., Hoseo Univ.)
  • 발행 : 2001.08.01
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초록

파장을 스케닝하기 위해 Fabry-Perot 필터를 사용하는 기존의 광섬유 브래그 격자(FBG) 스트레인 측정시스템은 PZT의 히스테리시스 특성과 필터의 느린 스케닝 시간 그리고 높은 가격으로 인해 응용이 제한적이다. 광원으로 비교적 저가인 발광 다이오드(LED)를 사용하고 FBG 센서를 다중화하기 위해 코드 분할 다중화(CDM) 방식을 도입한 다중 FBG 센서 시스템을 제안하였으며 실험을 통해 특성을 측정하였다. 실험은 정적 스트레인과 동적 스트레인을 측정하기 위한 두 가지 구조의 시스템에 대한 출력과 센서 신호간의 누화를 측정하였다. 구성한 시스템은 매우 저가이고 빠른 응답속도를 갖으며 누화의 레벨은 -30 dB 이하로 측정되었다.

The performance of the ordinary Fiber Bragg Grating(FBG) sensor strain measurement system, which uses Fabry-Perot filter for scanning wavelength, has limitation for application because of hysteresis characteristics of PZT element in the filter, slow scan rate of the filter and the high cost of system. We proposed and experimented a multiple FBG sensor system using light emitting diode(LED) as a light source and adapting Code Division Multiplexing(CDM) method to separating out individual sensor signal. Output signals for a applied static and dynamic strain and crosstalk levels between sensor signals were measured. The price of the system is very loss and the response speed is very fast. Crosstalk levels between sensor signals below - 30 dB were demonstrated.

키워드

참고문헌

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