摘要
在油气管道检测中,缺陷的定量分析一直是个难题.通过试验研制了管道漏磁腐蚀检测器,在钢管(273mm,壁厚为14.3mm)上设计了系列缺陷,并采集了缺陷漏磁的相关信号.研究了管道缺陷漏磁信号的分布规律和缺陷的几何尺寸大小之间的关系,结果表明,缺陷漏磁场检测信号的两波谷间距、检测到信号的传感器数和信号峰谷值分别是缺陷长度、宽度和深度量化分析的重要特征量,并由此得出缺陷长、宽、高的计算方法.通过该方法对缺陷的漏磁信号进行量化分析,表明缺陷长度、宽度和深度的平均绝对误差分别为2.4mm、8.3mm和0.8mm.
The quantitative recognition of defects is difficult in inspecting oil-gas pipelines. The detector (app-)lied to inspecting pipelines is designed and a series of defects are made on a pipeline( 273×14.3 mm). The signals of magnetic flux leakage (MFL) are collected in experiments. The relationship between the MFL signals and the sizes of defects is studied. The experimental results show that the space between the two lowest peaks, the number of sensors to detect the signal, the amplitude of the signals are respectively the indications of length, width and depth of the defects. The estimate method of the size of defects is designed. The results of quantitative analysis show that the mean errors of the length, width and depth are respectively 2.4 mm, 8.3 mm, 0.8 mm.
出处
《天津大学学报（自然科学与工程技术版）》
EI
CAS
CSCD
北大核心
2004年第8期686-689,共4页
Journal of Tianjin University：Science and Technology
基金
天津市自然科学基金重点资助项目(993802411).
关键词
油气管道
漏磁信号
无损检测
试验设计
管道缺陷
pipeline
non-destructive inspection
magnetic flux leakage
experimental study
