CAJ | 학술논문

海底光缆的使用环境中存在随机扰动因素,故使用传统单脉冲电磁脉冲时域反射法进行护套层故障探测会受到大量随机噪声的干扰,探测波形难以辨识,故障探测效果较差.为改善探测效果,根据海底光缆护套层结构特性将其等效为带有随机扰动偏差的有耗非均匀传输线模型进行分析,提出了使用单极性编码脉冲作为探测信号的海底光缆护套层故障探测方案.通过理论分析和实验研究,证明与单脉冲探测方案相比,该方案可以在不降低空间分辨率的前提下有效降低测试系统噪声,获得较好的探测效果,满足海底光缆护套层故障探测要求.
해저광람적사용배경중존재수궤우동인소,고사용전통단맥충전자맥충시역반사법진행호투층고장탐측회수도대량수궤조성적간우,탐측파형난이변식,고장탐측효과교차.위개선탐측효과,근거해저광람호투층결구특성장기등효위대유수궤우동편차적유모비균균전수선모형진행분석,제출료사용단겁성편마맥충작위탐측신호적해저광람호투층고장탐측방안.통과이론분석화실험연구,증명여단맥충탐측방안상비,해방안가이재불강저공간분변솔적전제하유효강저측시계통조성,획득교호적탐측효과,만족해저광람호투층고장탐측요구.
Random perturbations exist in the working environment of submarine optic fiber cable, so using traditional single-pulse TDR to detect the fault of submarine optic fiber cable sheath can not get ideal waveform due to the interference of random noise, and fault detecting effect is unsatisfactory. To solve this problem, an equivalent circuit model of submarine optic fiber cable sheath was proposed based on the structural characteristics of submarine optic fiber cable sheath, which is equal to a lossy-nonuniform transmission line with random perturbations. And a fault-detecting method was put forward, which adopted unipolar coding pulse as detecting signal. Through theoretical analysis and experimental studies, this program can effectively reduce the nosie of system without reducing the spatial resolution and improve the system gain compared with single-pulse TDR. So the detecting result can be improved, and meet the requirements of submarine optic fiber cable sheath fault-detecting engineering.