基于FBG震动传感器的边境安防系统研究  

Research of FBG vibration system used for border security

作　　者：王蒙 孙志慧 张琳 王滨 李振强 WANG Meng;SUN Zhi-hui;ZHANG Lin;WANG Bin;LI Zhen-qiang(Laser Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan,250000;Shengli Qlfield Xinsheng Petroleum Geophysical Technology Service Co.,Ltd,Dongying,2570003;Jining Zhengtong Construction Engineering Co,Ltd,Jining,272000)

机构地区：[1]齐鲁工业大学(山东省科学院),山东省科学院激光研究所,山东济南250000 [2]胜利油田新胜石油物探技术服务有限责任公司,山东东营257000 [3]济宁正通建设工程有限公司,山东济宁272000

出　　处：《光电子．激光》2020年第7期708-712,共5页Journal of Optoelectronics·Laser

基　　金：国家重点研发计划子课题“光纤微地震压裂监测系统应用示范”(2017YFB0405505);省重大创新工程项目“井中深层地震信号光纤传感采集方法及设备研发”(2017XGC1609)3;山东省科学院青年基金项目“基于光纤分布式声波检测技术的环境感知技术研究”(2018QN0015)资助项目。

摘　　要：周界安防系统是重要区域和设施的第一道防线,高性能的安防技术可以消除或减少外部的威胁。基于窄带光纤光栅波长选择反射原理,设计了一种高灵敏度的光纤光栅震动传感器并利用相位载波调制解调技术实现对传感器震动信号高精度实时解调。震动传感器通过地埋的布设方式,利用光纤光栅震动传感器波分、空分、时分的复用技术,实现在较长的光纤布设长度内对突发事件进行远程和实时监控。进行了野外试验,试验证明,通过合理算法分析传感器时变信号的能量谱和峭度等参数该系统可准确的识别70 m内人员走动和200 m内车辆行驶。该系统可广泛应用于边境线、机场、核场所等重要区域的周界安防中。Perimeter security is the first line of defense to protect the important facilities and assets.The peripheral security technology and method of high performance can eliminate or reduce the threat from the outside world.In this paper,a high sensitivity fiber optic vibration sensor is designed based on the principle of wavelength selective reflection of narrowband fiber Bragg grating.A phase generated carrier demodulator is used to demodulate the vibration signal of the sensor and the high precision real-time demodulation of the vibration signal of the sensor is achieved,Many of the multiplexing techniques,including wavelength division multiplexing(WDM),time division multiplexing(TDM),and spatial division multiplexing(SDM)can be directly applied,which makes it possible for networked/array FBG sensors to cover a large area.Vibration sensors are buried in the ground and have the ability of the remote and real-time monitoring within the length of optical fiber deployment.The vibration sensor and the demodulator are tested in the field and the experimental data are presented.Feld test results indicate that the response waveform of vibration sensor is obviously for personnel within 70 meters and for vehicle within 200 meters by analyzing the energy spectrum and kurtosis of time-varying signals of sensors.Soit can be used in a variety of fields such as border air port nuclear sites of the perimeter security technology.

关 键 词：光纤光栅 震动传感器 实时解调 边境安防 

分 类 号：TN253[电子电信—物理电子学]