High-performance railway perimeter security system based on the inline time-division multiplexing fiber Fabry-Perot interferometric sensor array
High-performance railway perimeter security system based on the inline time-division multiplexing fiber Fabry-Perot interferometric sensor array
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DOI：
10.1016/j.ijleo.2021.168191
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发表时间：
2021-10
期刊：
影响因子：
3.1
通讯作者：
Z. Ren;Jiachen Yao;Yunxia Huang;Xiao-hua Yang;R. Zhu
中科院分区：
文献类型：
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作者：
Z. Ren;Jiachen Yao;Yunxia Huang;Xiao-hua Yang;R. Zhu
提出了一种基于时分复用光纤法珀干涉(TDM-FFPI)传感器阵列的高性能铁路周界安防系统。该系统采用矩形脉冲二进制相位调制(RPBPM)方法进行解调，采用基于现场可编程门阵列(FPGA)的采集系统进行信号接收和处理，具有复杂度低、实时性强等优点。此外，还采用了三偏振器极化分集接收机(TRPDR)来克服极化引起的衰落消除。对于解调后的相位信号，采用了一种基于支持向量机的实时、准确的两级模式识别方法来识别不同的事件(非入侵事件，包括环境、雨和风，以及四种入侵事件，包括震动、切割、攀爬和敲击)。通过实验验证了该系统的可行性。平均识别准确率达到94.5%左右，积分时间小于0.2秒，满足了高精度、高实时性的要求。
This paper proposes a high-performance railway perimeter security system based on the inline time-division multiplexing fiber Fabry-Perot interferometric (TDM-FFPI) sensor array. A rectangular-pulse binary phase modulation (RPBPM) method is used for phase demodulation and a field programmable gate array (FPGA)-based acquisition system is adopted for receiving and processing the signals with the advantages of low complexity and high real-time capability in this system. Besides, a three-polarizer polarization diversity receiver (tr-PDR) is used to overcome the polarization-induced fading elimination. For the demodulated phase signals, a real-time and accurate two-level pattern recognition method based on the support vector machines (SVM) is employed for the recognition of different events (non-intrusion events including environment, rain and wind, and four intrusion events including shaking, cutting, climbing and knocking). The feasibility of the present system is verified experimentally. The average recognition accuracy is up to about 94.5% with the integrating time less than 0.2 s, which satisfies the high accuracy and high real-time requirements.