Security pre-warning system of underground pipelines based on BOTDR

Xuan Zheng; Yuxiang Cui; Qing Bai; Yu Wang; Xin Liu; Baoquan Jin

doi:10.1117/12.2585489

8 January 2021 Security pre-warning system of underground pipelines based on BOTDR

Xuan Zheng, Yuxiang Cui, Qing Bai, Yu Wang, Xin Liu, Baoquan Jin

Proceedings Volume 11607, Optics Frontiers Online 2020: Distributed Optical Fiber Sensing Technology and Applications; 116070K (2021) https://doi.org/10.1117/12.2585489
Event: Optics Frontiers Online 2020: Distributed Optical Fiber Sensing Technology and Applications (OFO-3), 2020, Virtual Event, Online Only

Abstract

The security pre-warning system of underground pipelines was traditionally designed by electronic sensors, usually suffering from intrinsic flawssuch as too scattered monitoring points and poor anti-interference performance. To overcome these disadvantages, a distributed optical fiber temperature and strain sensing system based on Brillouin Optical Time Domain Reflectometer (BOTDR) is designed and developed for underground pipelines security monitoring. In this paper, the sensing mechanism of temperature and strain sensing is analyzed and a BOTDR experimental scheme is presented. Meanwhile, the kernel software program is developed for signal demodulation. Then, the integrated BOTDR instrument is designed compactly and evaluated by temperature and strain measurement experiments, for respectively simulating pipeline leakage and deformation. The experimental results show that the sensing range of 10.268 km is achieved with a spatial resolution of 1.15 m. The nonlinear error is less than 1% FSS over the temperature and strain change of 30~90°C and 0-15000με.

Citation Download Citation

Xuan Zheng, Yuxiang Cui, Qing Bai, Yu Wang, Xin Liu, and Baoquan Jin "Security pre-warning system of underground pipelines based on BOTDR", Proc. SPIE 11607, Optics Frontiers Online 2020: Distributed Optical Fiber Sensing Technology and Applications, 116070K (8 January 2021); https://doi.org/10.1117/12.2585489

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