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| Alarm System Study of Rockfall Based on FPSS |
1. Northwest Research Institute Co. Ltd of CREC, Lanzhou, Gansu 730000, China; 2. Shenyuan Geotechnical Engineering Co. Ltd of Shanghai Xiandai Architectural Design Group, Shanghai 200041, China；3. University of Shanghai for Science and Technology, Shanghai 200093, China
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Abstract Abstract：Research purposes：
The accidents of rockfall collapse abound along the railway, it has become more and more important how to ensure the safe operation of the railway. In view of this situation, there is an urgent need to develop a set of automatic monitoring system which meets a variety of conditions in the high-risk sections along the long-term observation, automatic discovery of railway obstacle, and can provide early warning for passing trains. This paper applied FPSS(Fiber Perimeter Security Systems) to realize the vibration analysis and alarm function of passive network rockfall along the railway.
Research conclusions：1)Systematic development using FPSS optical fiber sensing technology, can be used successfully forvibration analysis and alarm of railway passive network rockfall, which have real-time, all-weather, unattended monitoring of passive rockfall network along the railway, to guarantee the safe operation of the railway. (2) The successful design of the system has realized the rockfall vibration signal acquisition of passive railway network, signal interference demodulation, signal acquisition, signal analysis and processing of the whole process. (3) The application of engineering examples show that the effect is good.（4）The research results can be applied to rockfall alarm of railway and highway.
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