基于有限元分析的管道漏磁检测信号识别技术

Identification of magnetic flux leakage signal of pipelines based on finite element analysis

利用有限元方法,建立管道漏磁检测的数值仿真模型,得出缺陷、补板、焊缝、法兰及支管等管道部件的漏磁场分布状况;对比缺陷与各管道部件漏磁场分布曲线,将漏磁曲线峰值、跨度及多传感器信号作为识别缺陷漏磁场与管道部件漏磁场的特征参数.

Through finite element method numerical simulation model of MFL test was established.Distribution of the magnetic leakage field caused by defects,additional plate,weld,flange,and branch was obtained.By comparing the distribution curve of defect and pipeline components,the peak of the curve, span and the difference in numbers of sensors received signal were identified as three characteristic parameters to identify magnetic flux leakage field caused by defect and pipeline components.