基于结构相似度的管道泄漏检测定位法  

Pipeline leak detection and location method based on structural similarity criteria

作　　者：刘炜[1,2] 刘宏昭[1] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,陕西西安710048 [2]陕西学前师范学院计算机与电子信息系,陕西西安710100

出　　处：《中南大学学报（自然科学版）》2017年第1期134-140,共7页Journal of Central South University:Science and Technology

基　　金：陕西省教育厅科研计划项目(16JK1184);陕西学前师范学院科研基金资助项目(2016YBKJ074)~~

摘　　要：从时间序列角度出发,提出一种基于结构相似度准则的输油管道泄漏检测定位方法。首先采用局部投影降噪法去除动态压力波信号噪声,其次验证并选取固定长度的正常动态压力波信号子序列作为模板序列,并选取相同长度的现场采集动态压力波信号作为被匹配序列,构造两子序列信号对应功率谱,然后计算其归一化功率谱之间的结构相似度;最后,根据结构相似度判定输油管道是否存在泄漏现象,若发生泄漏,则自动确定泄漏位置。研究结果表明:该方法可有效判定和定位输油管道泄漏。From the perspective of time series, a pipeline leak detection and location method based on structural similarity criteria was proposed. Firstly, the dynamic pressure wave signal noise was removed by local projection noise reduction method; secondly, the template sequence was validated and selected through the normal dynamic pressure wave signal subsequence with fixed length, and the matched sequence was selected by on-site acquisition dynamic pressure wave signal at the same length with which two sub-sequence signal corresponding power spectrums were calculated, and then the structural similarities between the normalized power spectrum were computed; finally, pipeline leaks based on the similarity of structure were determined if leaks occurred and the location of the leak was automatically determined. The results show that this method can determine and locate pipeline leak effectively.

关 键 词：管道泄漏 动态压力波 异常检测 模板匹配 结构相似度 

分 类 号：TE973[石油与天然气工程—石油机械设备]