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介绍了漏磁无损探伤原理，分析了缺陷信号的特点，提出了获取漏磁场信号特征量的几种方法。旨在为设备的故障诊断、材料缺陷的检测提供科学理论依据和方法。
The principle of magnetic flux leakage nondestructive testing is introduced, the characteristics of the defect signal are analyzed, and several methods for obtaining the characteristic quantity of the magnetic flux leakage signal are proposed. The purpose is to provide scientific basis and method for equipment fault diagnosis and material defect detection.