对带保温层管道腐蚀缺陷的检测中, 定量缺陷宽度、深度和体积是一个难点问题。提出了采用脉冲漏磁技术对带保温层管道腐蚀缺陷进行检测的方法。通过提取传感器感应信号不同的时域特征作为特征量, 分析了不同特征量随缺陷参数的变化规律, 得出对应关系式, 实现了对缺陷宽度、深度和体积的定量检测。试验结果证明了所采用方法的正确性和有效性。

Quantification for width, depth and volume of defects on pipeline with insulation is a difficult problem. A method of using pulsed magnetic flux leakage technique on testing corrosion defects on pipeline was proposed. Different features in time-domain were extracted to analyze the variation of the features and parameters of the defects, then the quantification for width, depth and volume of the defects could be realized through the obtained formula of the variation. The validity of the new method was demonstrated by experimental results.