A novel intrusion signal processing method for phase-sensitive optical time-domain reflectometry (Φ-OTDR)

Huijuan Wu; Xiaoyu Li; Zhengpu Peng; Yunjiang Rao

doi:10.1117/12.2058503

2 June 2014 A novel intrusion signal processing method for phase-sensitive optical time-domain reflectometry (Φ-OTDR)

Huijuan Wu, Xiaoyu Li, Zhengpu Peng, Yunjiang Rao

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91575O (2014) https://doi.org/10.1117/12.2058503
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Phase-sensitive Optical-Time-Domain Reflectometry (Φ-OTDR) is a useful distributed fiber-optic sensing technology to detect and locate multiple dynamic disturbances, offering a cost-effective and sensitive solution for intrusion monitoring of long perimeters. The Φ-OTDR is affected by laser frequency drift, air movement, transient acoustic interference and environmental noises. resulting in high Nuisance Alarm Rates (NARs). In this paper, we proposed a novel intrusion signal processing method based on the singular spectrum analysis of the longitudinal time sequence of the Φ-OTDR. The experimental results shows that true intrusions can be correctly distinguished from varying background noises and sound or air movement interferences. The probability for correct detection can be improved up to ~94% and false alarm rate can be controlled as low as ~6%.

Citation Download Citation

Huijuan Wu, Xiaoyu Li, Zhengpu Peng, and Yunjiang Rao "A novel intrusion signal processing method for phase-sensitive optical time-domain reflectometry (Φ-OTDR)", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91575O (2 June 2014); https://doi.org/10.1117/12.2058503

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