Calibration and Deployment of a Fiber-Optic Sensing System for Monitoring Debris FlowsReportar como inadecuado




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1

Department of Hydraulic and Ocean Engineering, National Cheng Kung University, No.1 University Road, Tainan, 70101, Taiwan

2

Monitoring and Management Division Soil and Water Conservation Bureau, Council of Agriculture, Nantou, 54044, Taiwan





*

Author to whom correspondence should be addressed.



Abstract This work presents a novel fiber-optic sensing system, capable of monitoring debris flows or other natural hazards that produce ground vibrations. The proposed sensing system comprises a demodulator BraggSCOPE, FS5500, which includes a broadband light source and a data logger, a four-port coupler and four Fiber Bragg Grating FBG accelerometers. Based on field tests, the performance of the proposed fiber-optic sensing system is compared with that of a conventional sensing system that includes a geophone or a microphone. Following confirmation of the reliability of the proposed sensing system, the fiber-optic sensing systems are deployed along the Ai-Yu-Zi and Chu-Shui Creeks in Nautou County of central Taiwan for monitoring debris flows. Sensitivity test of the deployed fiber-optic sensing system along the creek banks is also performed. Analysis results of the seismic data recorded by the systems reveal in detail the frequency characteristics of the artificially generated ground vibrations. Results of this study demonstrate that the proposed fiber-optic sensing system is highly promising for use in monitoring natural disasters that generate ground vibrations. View Full-Text

Keywords: fiber-optic sensing system; FBG accelerometer; debris flow; ground vibration fiber-optic sensing system; FBG accelerometer; debris flow; ground vibration





Autor: Ching-Jer Huang 1,* , Chung-Ray Chu 1, Tsung-Mo Tien 1, Hsiao-Yuen Yin 2 and Ping-Sen Chen 2

Fuente: http://mdpi.com/



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