An Energy Demodulation Based Fiber Optic Sensing System for Landslide Early-Warning

作者：Wang, Xing; Shi, Bin^*; Wei, Guangqing; Chen, Shenen

来源：Applied Sciences-Basel, 2017, 7(7): 699.

DOI：10.3390/app7070699

• landslides
• fiber optic sensing system
• early-warning
• energy demodulation
• event sensor

To help reduce the impact of geo-hazards, an innovative landslide early-warning technology based on an energy demodulation-based fiber optic sensing (FOS-LW for short) technology, is introduced in this paper. FOS-LW measures the energy change in a sensing fiber at the segment of micro-bending, which can be caused by landslide movements, and automatically raises an alarm as soon as the measured signal intensity in the fiber reaches a pre-set threshold. Based on the sensing of micro-bending losses in the fiber optics, a two-event sensing algorithm has been developed for the landslide early-warning. The feasibility of the FOS-LW technology is verified through laboratory simulation and field tests. The result shows that FOS-LW has some unique features-such as the graded alarm, real-time responses, remote monitoring, low cost and passive optical network-and can be applied in the early-warning of landslides.

• 出版日期2017-7
• 单位南京大学