基于支持向量机的分布式光纤泄漏检测定位系统及实验分析

针对基于Sagnac和Mach-Zehnder混合干涉仪的分布式光纤管道泄漏检测定位系统进行了泄漏实验,采用在1 km~9 km之间的20组泄漏点样本,依据支持向量机建立样本数据的回归模型,对支持向量机的相关调整参数进行了优化,对系统的灵敏度进行了分析.实验结果表明,经SVM回归分析可得,处理后样本比实验所得泄漏点位置更接近实际泄漏点位置,传统定位方法得到的泄漏点位置平均绝对误差为118.85 m,经过回归分析后样本的平均绝对误差为92.01 m,定位精确度达99.85%,定位精度提高;当泄漏点距法拉第旋转镜的距离越远,检测系统的灵敏度越小,当泄漏点位置超过10 km时,系统的灵敏度低于0.5 Hz/m.

Abstract

Leakage experiments were performed on the distributed optical fiber pipeline leakage detection system.The system was based on a mixed interference principle of Mach-Zehnder and Sagnac.20 groups of leakage point samples were gained between 1km to 9km from the leakage experiments.Support vector machines(SVMs)were used to build the sample of data model,the related parameters of SVM were optimized ,and the sensitivity of the system was analyzed.The results show that the processed samples are significantly closer to the actual leakage points than the experimental leakage points through regression analysis.The mean absolute error of experimental leakage points is 118.85m while that of the regression samples is 92.01m.The accuracy rate of positioning improves to 99.85%.The sensitivity of the detection system is lower when the leakage points are farther away from the Faraday rotation mirror.The sensitivity of the system is less than 0.5 Hz / m when the leakage points are over 10 km.

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黄悦, 王强, 韩玲娟, 朱俊. 基于支持向量机的分布式光纤泄漏检测定位系统及实验分析[J]. 应用光学, 2015, 36(3): 424. Huang Yue, Wang Qiang, Han Lingjuan, Zhu Jun. Support vector machine based distributed optical fiber leakage detection system and experimental analysis[J]. Journal of Applied Optics, 2015, 36(3): 424.

基于支持向量机的分布式光纤泄漏检测定位系统及实验分析

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