海底光缆敷设投资巨大, 而近海区域人为导致的断缆故障频发。目前的技术手段只能在海缆被破坏后进行断点定位, 而无法对海缆潜在危害事件进行实时监测、提前预警和事件定位。提出了一种双向干涉多域相关识别技术, 通过海缆中已有光纤构建对外部安全侵害事件敏感的传感系统, 对无事件发生、敲击光纤和拉拽光纤这3类事件进行了实验与分析。实验结果表明: 该技术可有效预防海缆灾害, 提高重要海缆的安全性和生存性。

The investment in laying submarine cables is huge, and man-made failures in offshore areas are frequent. The current technology can only locate the breakpoint after the submarine cable is damaged, but cannot carry out real-time monitoring, early warning and event location for the potential hazard events of the submarine cable. In this paper, a bidirectional interference multi-domain correlation recognition technology is proposed, and the sensor system sensitive to external security violation events is constructed through the existing optical fiber in the submarine cable. Three kinds of events, namely non-event occurrence, knocking optical fiber and pulling optical fiber, are tested and analyzed. The experimental results show that the technique can effectively prevent submarine cable disasters and improve the safety and survivability of important submarine cables.