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Journal of Sensors - Volume 2016 2016, Article ID 9496285, 8 pages -

Research Article

College of Transportation Science and Engineering, Nanjing Tech University, Nanjing 210009, China

Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China

School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China

Suzhou NanZee Sensing Technology Co., Ltd., Suzhou 215123, China

Received 1 April 2016; Revised 16 June 2016; Accepted 12 July 2016

Academic Editor: Zhenhua Zhu

Copyright © 2016 Yijie Sun et al. 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.


To overcome the shortcomings of conventional slope monitoring methods, this paper presented an in-place inclinometer based on BOTDR Brillouin Optical Time Domain Reflectometer which was used to obtain the long-term internal deformation in the slope. The installation process of optical fiber sensors and its measuring principle were introduced. The result of analysis indicated that the error in the measured displacement was proportional to the square of the inclinometer length and the precision of the BOTDR instrument, while it was inversely proportional to the diameter of the inclinometer tube. An actual field slope deformation monitoring case was also introduced. The results show that the BOTDR based inclinometer has a good consistency with the traditional inclinometer. It can effectively access the internal deformation of the slope and help to find the position of potential sliding surface accurately. This technology shows a high reliability and practicality in engineering application that will promote deeper research of slope in the future.

Autor: Yijie Sun, Bin Shi, Dan Zhang, Hengjin Tong, Guangqing Wei, and Hongzhong Xu



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