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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Energy Demodulation-Based All-Fiber Warning System for Landslides
verfasst von : Xing Wang, Guangqing Wei, Bin Shi, Fenggao Xu, Hengjin Tong
Erschienen in: Landslide Science for a Safer Geoenvironment
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Abstract
In this paper, a new landslide warning technology, called the energy demodulation-based all-fiber warning system, is introduced. The system can measure the signal of energy change in fiber caused by micro-bending or breakage associated with the displacement of a landslide, and sends alarms at once when the signal intensity in the fiber weakens to a defined threshold. Compared with conventional monitoring technologies, this technology has many unique advantages, such as graded alarming, real-time response, remote monitoring, low cost, and a passive optical network. It is a very convenient and applicable landslide warning system. At present time this system has been developed and used in landslide warning in China.