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Event Discrimination Method for Distributed Optical Fiber Intrusion Sensing System Based on Integrated Time/Frequency Domain Feature Extraction

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To reduce the high false alarm rate of the distributed fiber intrusion monitoring system in outdoor complex environment, this study proposes and demonstrates an intrusion event discrimination method based on integrated time/frequency domain feature extraction. First, a vibration fragment segmentation algorithm based on a self-adaptive amplitude threshold is developed to distinguish the vibrating part. On this basis, the average fragment interval feature is extracted. Next, the vibration fragment with the maximum energy is chosen as the research target, and the length and peak-to-average ratio are extracted in the time domain, whose energy distribution in the frequency domain is calculated according to wavelet packet decomposition and an integrated time/frequency domain feature vector is formed. Finally, one-versus-one support vector machine is used to classify four common intrusion events: footsteps of a passerby, bicycle rolling, knocking on the fence, and cutting of an optical cable. The experimental results show that the proposed method recognizes the abovementioned four common intrusion events with an average accuracy of 98.33%, which is much more accurate than the methods that only extract the time or frequency domain features. Moreover, the proposed method is immune to the optical power variation in light path. Thus, the proposed method is helpful to improve the utility of the system.








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彭宽:华中科技大学光学与电子信息学院, 湖北 武汉 430074武汉飞思灵微电子技术有限公司, 湖北 武汉 430074
冯诚:华中科技大学光学与电子信息学院, 湖北 武汉 430074
王森懋:华中科技大学光学与电子信息学院, 湖北 武汉 430074
艾凡:华中科技大学光学与电子信息学院, 湖北 武汉 430074
李豪:华中科技大学光学与电子信息学院, 湖北 武汉 430074
刘德明:华中科技大学光学与电子信息学院, 湖北 武汉 430074
孙琪真:华中科技大学光学与电子信息学院, 湖北 武汉 430074



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Kuan Peng,Cheng Feng,Senmao Wang,Fan Ai,Hao Li,Deming Liu,Qizhen Sun. Event Discrimination Method for Distributed Optical Fiber Intrusion Sensing System Based on Integrated Time/Frequency Domain Feature Extraction[J]. Acta Optica Sinica, 2019, 39(6): 0628002

彭宽,冯诚,王森懋,艾凡,李豪,刘德明,孙琪真. 基于时/频域综合特征提取的分布式光纤入侵监测系统事件识别方法[J]. 光学学报, 2019, 39(6): 0628002

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