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Sensors 2016, 16(8), 1164; doi:10.3390/s16081164

Distributed Fiber-Optic Sensors for Vibration Detection

Key Laboratory of Advanced Transducers and Intelligent Control Systems, Ministry of Education, Taiyuan University of Technology, No. 79 Yingzexi Street, Taiyuan 030024, China
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Academic Editor: Vittorio M. N. Passaro
Received: 2 June 2016 / Revised: 18 July 2016 / Accepted: 19 July 2016 / Published: 26 July 2016
(This article belongs to the Section Physical Sensors)
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Abstract

Distributed fiber-optic vibration sensors receive extensive investigation and play a significant role in the sensor panorama. Optical parameters such as light intensity, phase, polarization state, or light frequency will change when external vibration is applied on the sensing fiber. In this paper, various technologies of distributed fiber-optic vibration sensing are reviewed, from interferometric sensing technology, such as Sagnac, Mach–Zehnder, and Michelson, to backscattering-based sensing technology, such as phase-sensitive optical time domain reflectometer, polarization-optical time domain reflectometer, optical frequency domain reflectometer, as well as some combinations of interferometric and backscattering-based techniques. Their operation principles are presented and recent research efforts are also included. Finally, the applications of distributed fiber-optic vibration sensors are summarized, which mainly include structural health monitoring and perimeter security, etc. Overall, distributed fiber-optic vibration sensors possess the advantages of large-scale monitoring, good concealment, excellent flexibility, and immunity to electromagnetic interference, and thus show considerable potential for a variety of practical applications. View Full-Text
Keywords: vibration detection; distributed fiber-optic sensor; interferometric sensing technology; backscattering-based sensing technology; structural health monitoring; perimeter security vibration detection; distributed fiber-optic sensor; interferometric sensing technology; backscattering-based sensing technology; structural health monitoring; perimeter security
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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).

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Liu, X.; Jin, B.; Bai, Q.; Wang, Y.; Wang, D.; Wang, Y. Distributed Fiber-Optic Sensors for Vibration Detection. Sensors 2016, 16, 1164.

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