Next Article in Journal
Integrated Optical Content Addressable Memories (CAM) and Optical Random Access Memories (RAM) for Ultra-Fast Address Look-Up Operations
Next Article in Special Issue
Non-Local Effects in Brillouin Optical Time-Domain Analysis Sensors
Previous Article in Journal
Experimental Study on the Physical Simulation of Water Invasion in Carbonate Gas Reservoirs
Previous Article in Special Issue
Single Mode Air-Clad Single Crystal Sapphire Optical Fiber
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Appl. Sci. 2017, 7(7), 699; doi:10.3390/app7070699

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

School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China
Suzhou Nanzee Sensing Technology Co., Ltd., Suzhou 215123, China
Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte, NC 28223, USA
Author to whom correspondence should be addressed.
Academic Editor: Christoph Peter Hauri
Received: 24 March 2017 / Revised: 5 June 2017 / Accepted: 9 June 2017 / Published: 7 July 2017
(This article belongs to the Special Issue Distributed Optical Fiber Sensors)
View Full-Text   |   Download PDF [3656 KB, uploaded 7 July 2017]   |  


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. View Full-Text
Keywords: landslides; fiber optic sensing system; early-warning; energy demodulation; event sensor landslides; fiber optic sensing system; early-warning; energy demodulation; event sensor

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Wang, X.; Shi, B.; Wei, G.; Chen, S. An Energy Demodulation Based Fiber Optic Sensing System for Landslide Early-Warning. Appl. Sci. 2017, 7, 699.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top