Detection of multiple vibration points using fundamental frequency and harmonic progressions in response spectra of POTDR

Chen, Mengmeng; Wang, Rui; Zhang, Xuping; Hu, Junhui; Wang, Xiangchuan; Zhu, Chengqian

doi:10.1016/j.ijleo.2013.03.054

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Cited by 2 publications

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“…In φ-OTDR [4] , as Figure 1 show, continuous pulsed light is emitted to the sensor by the laser source. When the fiber Bragg grating sensor is disturbed locally, the polarization state of the light will change.…”

Section: Experimental System and Principlesmentioning

confidence: 99%

Pipeline running state prediction based on optical fiber sensing and optimized long short-term memory learning network

Li,

Tong,

Zhang

et al. 2023

International Conference on Electronic Information Engineering and Data Processing (EIEDP 2023)

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Section: Experimental System and Principlesmentioning

confidence: 99%

Pipeline running state prediction based on optical fiber sensing and optimized long short-term memory learning network

Li,

Tong,

Zhang

et al. 2023

International Conference on Electronic Information Engineering and Data Processing (EIEDP 2023)

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“…However, different vibrations with wide frequency range are common in practical applications, which makes the FFT analysis difficult to use in these situations. Some efforts have been made to improve the multi-point detection performance of the POTDR system [ 117 , 118 ], though multi-point vibration detection is a still challenging problem, which greatly restricts the practical applications of the POTDR system.…”

Section: Distributed Fiber-optic Vibration Sensing Technologymentioning

confidence: 99%

Distributed Fiber-Optic Sensors for Vibration Detection

Liu

Jin

Bai

et al. 2016

Sensors

186

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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.

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Detection of multiple vibration points using fundamental frequency and harmonic progressions in response spectra of POTDR

Cited by 2 publications

References 6 publications

Pipeline running state prediction based on optical fiber sensing and optimized long short-term memory learning network

Pipeline running state prediction based on optical fiber sensing and optimized long short-term memory learning network

Distributed Fiber-Optic Sensors for Vibration Detection

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