基于Sagnac干涉仪和Φ-OTDR的光缆振动预警定位系统  

Optical cable vibration early warning and positioning system based on Sagnac interferometer and Φ-OTDR

作　　者：赵奎[1] 肖尊定 胡建超 ZHAO Kui;XIAO Zunding;HU Jianchao(The 34th Research Instiute of CETC,Guilin Guangxi 541004,China;Guilin Julian Technology Co.Ltd.,Guilin Guangxi 541004,China)

机构地区：[1]中国电子科技集团公司第三十四研究所,广西桂林541004 [2]桂林聚联科技有限公司,广西桂林541004

出　　处：《光通信技术》2020年第6期11-14,共4页Optical Communication Technology

摘　　要：针对光缆经常遭到工程施工破坏的问题,提出了一种低成本的监测光缆线路沿线工程施工情况的振动预警定位系统,采用多个基于单轴Sagnac干涉仪的振动预警模块实时监测多个光缆的振动情况,通过相位敏感光时域反射仪(Φ-OTDR)模块确定振动点的位置。实验表明该系统成本低、预警效果好。Aiming at the problem that the optical cable is often damaged by engineering construction,a low-cost vibration early warning and positioning system for monitoring the engineering construction along the optical cable line is proposed.Multiple vibration early warning modules based on single axis Sagnac interferometer are used to monitor the vibration of multiple optical cables in real time,and the position of the vibration point is determined by the phase sensitive time domain reflectometer(Φ-OTDR)module.Experiments show that the system has low cost and good early warning effect.

关 键 词：单轴Sagnac干涉仪 光开关选通 相位敏感光时域反射仪模块 后向瑞利散射 选定时间窗口取样 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]