基于分布式光纤声波传感的光缆状态监测研究

Research on optical cable condition monitoring based on distributed optical fiber acoustic sensing

针对目前分布式光纤声波传感技术监测光缆灵敏度低的问题,提出了一种基于优化分布式光纤声波传感的光缆状态监测模型。首先通过理论分析了不同结构电缆的灵敏度,从而在理论层面分析影响灵敏度因素。其次基于优化分布式光纤声波传感测试不同传感电缆的灵敏度。实验结果表明,直径越小、杨氏模量越小的光缆可以有效提高灵敏度。结果与理论结果一致,表明所提方案对电缆状态监测的发展具有一定借鉴作用。

A fiber optic cable status monitoring model based on optimized distributed fiber optic acoustic sensing technology is proposed to address the issue of low sensitivity in current distributed fiber optic acoustic sensing monitoring cables.Firstly,the sensitivity of cables with different structures is theoretically analyzed,and the factors affecting sensitivity are analyzed at the theoretical level.Secondly,the sensitivity of different sensing cables is tested based on optimized distributed optical fiber acoustic sensing.The experimental results indicate that optical cables with smaller diameter and lower Young's modulus can effectively improve sensitivity.The test results are consistent with the theoretical analysis results,indicating that the proposed scheme has a certain reference value for the development of cable condition monitoring.