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Real-time distributed optical fiber vibration sensing based on phase-sensitive OTDR
Author(s): Xin Liu; Yu Wang; Jianguo Zhang; Dong Wang; Pengfei Wang; Qing Bai; Baoquan Jin
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Paper Abstract

Phase-sensitive optical time domain reflectometry (Φ-OTDR) is a promising approach for detecting and locating vibration signals along the whole fiber link. In this paper, a novel high-speed and complete signal transmission scheme based on field programmable gate array (FPGA) and universal serial bus (USB) 2.0 is proposed and applied in the Φ-OTDR system to obtain real-time vibration location. By using the novel scheme, only the effective data is selected and transmitted to the upper system for post-processing in real time. In the experiment, the vibration signals are simulated by hand-clapping, 50 Hz square waves and 400 Hz sine waves. The experimental results demonstrate that the proposed system exhibits good frequency response for vibrations below 1 kHz over 12 km fiber length. In addition, repetition vibration tests are carried out on 4.633 km and 10.022 km, and the location error is within the range of -7 m to +11 m. Therefore, the proposed system holds considerable potential for real-time vibration location and may have a wide application range in areas such as intruder detection, premier security, oil/gas pipeline leakage detection, and railway infrastructure monitoring, etc.

Paper Details

Date Published: 12 December 2018
PDF: 4 pages
Proc. SPIE 10849, Fiber Optic Sensing and Optical Communication, 108491J (12 December 2018); doi: 10.1117/12.2505720
Show Author Affiliations
Xin Liu, Taiyuan Univ. of Technology (China)
Yu Wang, Taiyuan Univ. of Technology (China)
Jianguo Zhang, Taiyuan Univ. of Technology (China)
Dong Wang, Taiyuan Univ. of Technology (China)
Pengfei Wang, Taiyuan Univ. of Technology (China)
Qing Bai, Taiyuan Univ. of Technology (China)
Baoquan Jin, Taiyuan Univ. of Technology (China)

Published in SPIE Proceedings Vol. 10849:
Fiber Optic Sensing and Optical Communication
Jie Zhang; Songnian Fu; Qunbi Zhuge; Ming Tang; Tuan Guo, Editor(s)

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