CAJ | 학술논문

针对低拉力及复杂拉力混合作用下的光纤复合架空地线(optical fiber composite overhead ground wire, OPGW)难以用布里渊时域反射仪直接准确获得光缆应变的问题,研究了不同低应力区间 OPGW 内部光纤布里渊散射的频移变化特点,以及恒拉力与动态变化拉力对 OPGW 内部光纤布里渊频移的影响,提出利用相关因数与布里渊散射相结合的 OPGW 应力分析方法,并构建了用于监测低拉力及复杂拉力混合作用下 OPGW 内部光纤布里渊散射频移的试验平台,应用该平台以多速率条件分解光纤所受复杂拉力混合作用,提取多速率下OPGW 内部光纤布里渊散射的频移特征,得到了相关因数与光缆应力的关系曲线。试验结果表明,通过分析相关因数可准确地判断光缆应力情况,为分析 OPGW 运行状态提供依据。
침대저랍력급복잡랍력혼합작용하적광섬복합가공지선(optical fiber composite overhead ground wire, OPGW)난이용포리연시역반사의직접준학획득광람응변적문제,연구료불동저응력구간 OPGW 내부광섬포리연산사적빈이변화특점,이급항랍력여동태변화랍력대 OPGW 내부광섬포리연빈이적영향,제출이용상관인수여포리연산사상결합적 OPGW 응력분석방법,병구건료용우감측저랍력급복잡랍력혼합작용하 OPGW 내부광섬포리연산사빈이적시험평태,응용해평태이다속솔조건분해광섬소수복잡랍력혼합작용,제취다속솔하OPGW 내부광섬포리연산사적빈이특정,득도료상관인수여광람응력적관계곡선。시험결과표명,통과분석상관인수가준학지판단광람응력정황,위분석 OPGW 운행상태제공의거。
In allusion to the problem of optical fiber composite overhead ground wire (POGW)being unable to directly and accurately obtain optical cable strain by using Brillouin time domain reflectometer (BOTDR)under mixed action of low ten-sion and complicated tension,characteristics of frequency shift change of optical fiber Brillouin scattering inside OPGW in different low stress intervals were studied as well as impacts on optical fiber Brillouin scattering inside OPGW by constant tension force and dynamic changing tension force.In addition,analysis method for OPGW stress combining correlation co-efficient and Brillouin scattering was proposed and test platform for monitoring optical fiber Brillouin scattering frequency shift inside OPGW under mixed action of low tension and complicated tension was constructed by which it was able to de-compose mixed action of complicated tension with multirate,extract characteristic of frequency shift of optical fiber Bril-louin scattering and obtain relationship curve of correlation coefficient and optical cable stress.Experimental result indicates that it is able to correctly judge optical cable stress by analyzing correlation coefficient and providing basis for analyzing op-erational state of OPGW.