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자료유형
학술저널
저자정보
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제21권 제3호
발행연도
2007.6
수록면
46 - 51 (6page)

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이 논문의 연구 히스토리 (8)

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A multi-purpose environmental monitoring system has been developed as a commercially available standard using the technique of hetero-core spliced fiber optic sensors, for the purposes of monitoring large-scale structures and preserving natural environments. The monitoring system has been tested and evaluated in a possible outdoor condition, in view of the full-scale operation at actual sites to be monitored. Additionally, the developed system in this work conveniently provides us with various options of sensor modules intended for monitoring such physical quantities as displacement, distortion, pressure, binary states, and liquid adhesion. Two channels of optical fiber line were monitored in each channel, three displacement sensor modules were connected in series, in order to examine the performance to a pseudo-cracking experiment in the outdoor situation and to clarify temperature influences on the system, in terms of the coupling of optical connectors and the OTDR stability. The results from the pseudo-cracking experiment agreed with the actual cracks, by means of calculation, based on the detected displacement values and their geometrical arrangement of the used sensor modules. The temperature change, ranging from 10 to 20 ℃, resulting from the 10-days free running operation, was found to influence the system stability of ±10㎛, primarily due to the coupling instability of the used optical connectors. It was found that fusion splicing, rather than the use of connectors, reduced the fluctuation down to ±2㎛. The specification and performance of various option modules have been demonstrated to show the capability of inspecting various physical quantities by use of the single system, which would be suitable for multi-purpose environmental monitoring.

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ABSTRACT
1. 서론
2. 기반기술로서의 헤테로코어형 광파이버센서
3. 멀티환경 모니터링 시스템의 개요와 환경 실험
4. Multi 모니터링용 센서모듈의 사양
5. 결론
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