半导体光电, 2018, 39 (1): 105, 网络出版: 2018-08-30
改进的D-S证据理论在Φ-OTDR三路监测系统中的应用
Application of Improved D-S Evidence Theory in Φ-OTDR Three-Channel Monitoring System
相位敏感光时域反射计 误警率 D-S证据理论 信息融合 报警性能 phase sensitive optical time domain reflectometer false alarm rate D-S evidence theory information fusion alarm performance
摘要
针对相位敏感光时域反射计(Φ-OTDR)分布式光纤扰动传感系统严重的误警问题, 在Φ-OTDR多路监测系统方案的基础上, 提出了将改进的D-S证据理论应用于Φ-OTDR三路监测系统中以减少误警率。利用改进的D-S证据理论信息融合算法对每路输出数据进行融合, 然后将融合结果与报警阈值相比较, 判断是否发生报警。实验测试发现: 基于改进的D-S证据理论的Φ-OTDR三路监测系统不仅在三路监测方案中能够正确判断扰动信号, 还使得漏警率由3%降至1%, 72h内误警率由3.3%降至0%, 提高了系统的报警性能。
Abstract
According to severe false alarm problem of the phase sensitive optical time domain reflectometer (Φ-OTDR) optical fiber distributed disturbance sensor system, based on multi-channel monitoring system with Φ-OTDR scheme, the improved D-S evidence theory was applied to the Φ-OTDR three-channel monitoring system to reduce false alarm rate. Each output data was fused using improved D-S evidence theory information fusion algorithm. Then the fusion result was compared with the alarm threshold to determine whether the alarm occurs. The experimental results show that Φ-OTDR three-channel monitoring system based on the improved D-S evidence theory can not only correctly judge the disturbance signal in the three-channel monitoring scheme, but also decrease the leak alarm rate from 3% to 1%, and the false alarm dropped from 3.3% to 0% within 72 hours, improving the system alarm performance.
张文霞, 邵洪峰, 王夏霄, 于佳. 改进的D-S证据理论在Φ-OTDR三路监测系统中的应用[J]. 半导体光电, 2018, 39(1): 105. ZHANG Wenxia, SHAO Hongfeng, WANG Xiaxiao, YU Jia. Application of Improved D-S Evidence Theory in Φ-OTDR Three-Channel Monitoring System[J]. Semiconductor Optoelectronics, 2018, 39(1): 105.