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Sensors 2017, 17(3), 452;

FBG-Based Monitoring of Geohazards: Current Status and Trends

School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
Nanjing University High-Tech Institute at Suzhou, Suzhou 215123, China
Author to whom correspondence should be addressed.
Academic Editors: Christophe Caucheteur and Tuan Guo
Received: 15 December 2016 / Revised: 3 February 2017 / Accepted: 7 February 2017 / Published: 24 February 2017
(This article belongs to the Special Issue Recent Advances in Fiber Bragg Grating Sensing)
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In recent years, natural and anthropogenic geohazards have occured frequently all over the world, and field monitoring is becoming an increasingly important task to mitigate these risks. However, conventional geotechnical instrumentations for monitoring geohazards have a number of weaknesses, such as low accuracy, poor durability, and high sensitivity to environmental interferences. In this aspect, fiber Bragg grating (FBG), as a popular fiber optic sensing technology, has gained an explosive amount of attention. Based on this technology, quasi-distributed sensing systems have been established to perform real-time monitoring and early warning of landslides, debris flows, land subsidence, earth fissures and so on. In this paper, the recent research and development activities of applying FBG systems to monitor different types of geohazards, especially those triggered by human activities, are critically reviewed. The working principles of newly developed FBG sensors are briefly introduced, and their features are summarized. This is followed by a discussion of recent case studies and lessons learned, and some critical problems associated with field implementation of FBG-based monitoring systems. Finally the challenges and future trends in this research area are presented. View Full-Text
Keywords: fiber optic sensor; fiber Bragg grating (FBG); geological process; geohazard; field monitoring; geotechnical instrumentation fiber optic sensor; fiber Bragg grating (FBG); geological process; geohazard; field monitoring; geotechnical instrumentation

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Zhu, H.-H.; Shi, B.; Zhang, C.-C. FBG-Based Monitoring of Geohazards: Current Status and Trends. Sensors 2017, 17, 452.

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