20 February 2006 Optical fiber speckle sensor for wire net fence application
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Proceedings Volume 6041, ICMIT 2005: Information Systems and Signal Processing; 60412T (2006) https://doi.org/10.1117/12.664478
Event: ICMIT 2005: Merchatronics, MEMS, and Smart Materials, 2005, Chongqing, China
The optical fiber speckle sensor is attractive candidate in the security area involving wire net fence. A single fiber detection zone can be as long as few kilometers and also high sensitivity can be obtained using a simple optical configuration. The drawback in the application using wire net fence is its high false alarm rate caused by the environment effect such as wind. In this paper, a new algorithm to reduce the false alarm rate in optical fiber speckle sensor for wire net fence application was proposed. The generated signal from speckle sensor was compared with expected values in time domain response. Also the event number was compared with the probability of detection. The optical fiber speckle sensor having signal filter and signal processor has been fabricated and investigated experimentally. The custom filter was found to be effective in environmental noise reduction, however the signal processor played the key role to prevent fault burglar detection crossing the wire net fence. The monitored result using calibrated hardware and algorithm showed effective blocking of false signals while showing the reliable burglar detections. The possible application of this optical fiber speckle sensor using the proposed algorithm is expected in security area where vibration or strain is the major impact to the sensor.
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Kyoo Nam Choi, Kyoo Nam Choi, } "Optical fiber speckle sensor for wire net fence application", Proc. SPIE 6041, ICMIT 2005: Information Systems and Signal Processing, 60412T (20 February 2006); doi: 10.1117/12.664478; https://doi.org/10.1117/12.664478

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