CAJ | 학술논문

光缆线路定位是进行光缆线路施工、安装以及维护的一项重要工作，因此对光缆线路定位的关键技术进行研究具有重要意义。目前主要采用的是基于菲涅尔反射的OTDR定位方法。本文根据Sagnac干涉原理，以光纤传感理论作为基础，同时结合相应的光相位调制解调技术，提出一种新的光缆线路定位方法，可有效实现光缆线路的定位检测。本文主要介绍该方法的检测原理及系统构成，对干扰信号引起的光信号的相位变化进行理论分析，分析该方法的定位原理并进行仿真。在理论分析的基础上搭建相应的实验测试平台，验证该方法的可行性。实验结果表明，该方法能够较准确地对干扰信号的位置进行定位。
광람선로정위시진행광람선로시공、안장이급유호적일항중요공작，인차대광람선로정위적관건기술진행연구구유중요의의。목전주요채용적시기우비열이반사적OTDR정위방법。본문근거Sagnac간섭원리，이광섬전감이론작위기출，동시결합상응적광상위조제해조기술，제출일충신적광람선로정위방법，가유효실현광람선로적정위검측。본문주요개소해방법적검측원리급계통구성，대간우신호인기적광신호적상위변화진행이론분석，분석해방법적정위원리병진행방진。재이론분석적기출상탑건상응적실험측시평태，험증해방법적가행성。실험결과표명，해방법능구교준학지대간우신호적위치진행정위。
As the key component of preparatory work in construction ,installation and maintenance of fiber optic cable is the location ,the research on fiber‐optic cable location method is important .Currently ,the main loca‐tion method used is the OTDR based on Fresnel reflection .In this paper ,a new fiber optic cable location meth‐od was proposed ,which is based on Sagnac effect and fiber‐optic sensing theory combined with corresponding optical phase modulation and demodulation technology ,to locate the cable position effectively .T his paper ex‐pounded the detection principle of the method and the structure of the system .The phase variation of optical signal caused by interference signal was analyzed .The positioning principle of the method was studied and sim‐ulation on the method was conducted .On the basis of theoretical analysis ,appropriate experimental test plat‐form was set up ,where the feasibility of the method was verified .The experimental results showed that the method can locate the position of the interference signal accurately .