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A Study of the Optical Fiber Sensor for sensing impact and pressure  

양승국 (한국해양대학교 전자통신공학과)
조희제 (한국해양대학교 전자통신공학과)
이석정 (한국해양대학교 산업기술연구소)
전중성 (한국해양대학교 산업기술연구소)
오상기 (한국전기연구원 정보ㆍ광연구그룹)
김인수 (한국전기연구원 정보ㆍ광연구그룹)
오영환 (한국광통신)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.7, no.1, 2003 , pp. 129-135 More about this Journal
Abstract
Optical fiber has many advantages, such as high reliability, long lifetime, immunity to the electromagnetic interference, high speed response and low cost. In this study, we proposed and developed an optical fiber impact and pressure sensor for prevention of accident which occurs in the automatic system or auto door. The principle of the sensor is to detect different optical intensity caused by variation of a speckle pattern due to the external perturbation. Speckle pattern appears at the end of a multimode fiber in which coherent beam propagates. The fabricated sensor in this study was tested. As a result of experiments, amplitude of the output signal isn't linear, but it has sufficient sensitivity for a sensor. Moreover, we can control sensitivity of the sensor by an amplifier at receiver. It has several advantages which are ability of detection at all point on the multimode fiber, large sensitive area, and many application areas for a sensing impact and pressure.
Keywords
Optical fiber sensor; Speckle pattern; Optical interference; Multimode fiber;
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  • Reference
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