分布式光纤安防系统传感和定位技术研究  

Study on the Distributed Fiber Optic Sensing and Locating Technology for Security System

作　　者：罗光明[1,2] 张春熹[1] 马宗峰[1] 蓝天[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100083 [2]湘潭大学信息工程学院,湖北湘潭411105

出　　处：《压电与声光》2009年第3期327-329,333,共4页Piezoelectrics & Acoustooptics

摘　　要：提出了一种基于马赫-泽德(M-Z)干涉仪原理的分布式光纤振动传感与定位的技术,该技术可实时检测整个光纤沿线发生的振动信息,并利用该技术设计了一种安防报警系统。分析了该系统的定位工作原理,理论分析和模拟实验表明系统具有很高的检测灵敏度。在总长度为18.46 km的光纤上进行了实验,系统实时地给出振动的位置,平均定位误差为42 m,将光源功率增至300μW,可对长度26 km的光纤上的振动信号进行定位。A new distributed fiber optic perturbation sensing and locating technology based on the Maeh-Zehnder （M-Z） interferometers was studied. This technology can be used to detect the perturbation along all fiber in realtime. Based on this technology, a security system was designed, and the locating principle of this system was analyzed. The result of the theoretic analysis and the experiment showed that the measurement sensitivity of the detecting perturbation is greatly improved. Experimenting on the type disturbance＇s optic cable and forcing on the 18.46 km long distance fiber, the system correctly showed the position in real time and the average location error is 42 m. The experiment showed that the system can be applicable for locating on 26 km distance fiber cable when the power of the laser resource increases to 300 μW. Key words：distributed optic fiber sensor;perturbation;Mach-Zehnder interferometer;location

关 键 词：分布式光纤传感器 微振动 马赫-泽德(M—Z)干涉仪 定位 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]