摘要
传统的漏磁检测是经磁化后测量试样表面漏磁场的垂直分量再对拾取的信号量进行分析研究的方法,然而这种仅通过单一垂直分量特性来判定缺陷的方法易出现漏检、误判。针对该方法的不足,本研究采用了一种在测量漏磁场垂直分量的同时又提取并分析水平分量特性的二维检测方法,考虑到水平分量易受干扰信号影响,运用了矢量合成法提取水平分量,通过联合利用漏磁场的垂直分量存在过零点和水平分量具有最大值特性的方法来判断缺陷,并选取多种标准与自然试样进行试验研究。试验结果表明:采用漏磁二维检测可有效实施铁磁构件的缺陷检测,提高检测可靠性,可望有很好的实际工程应用前景。
Traditional magnetic flux leakage method includes measuring the vertical component of magnetic flux leakage of specimen surface after magnetization, and researching the picked signal characteristics. However, the method, which determines the defects just through a single vertical component characteristic, is prone to undetected and misjudgment. In view of the deficiency, a new two-dimensional detection method which measures the vertical component of leakage magnetic field at the same time picks and analyses the horizontal component characteristic was used, since the horizontal component is easily affected by the jamming signal, a vector synthesis method was used to extract it, the vertical component of the leakage magnetic field existing zero crossing and the horizontal component having the characteristics of the maximum were comprehensively considered, extensive experiments and researches were done on various standard and nature sample. The results showed that the two-dimensional detection of magnetic flux leakage can detect defects effectively and improve the detection reliability, and it is expected to have good prospects for practical engineering applications.
出处
《失效分析与预防》
2013年第5期264-268,共5页
Failure Analysis and Prevention
基金
国家自然科学基金(51065022)
关键词
漏磁检测
二维检测
漏磁场
磁化
magnetic flux leakage method
two-dimensional detection
leakage field
magnetization
