作为目前应用最普遍的铁磁性材料的无损检测(non-destructivetestingmethods，NDT)方法之一，漏磁检测(magneticfluxleakagedetection，MFL)具有易量化、高可靠性、高效、低污染等诸多优势。但是，和其它无损检测方法一样，漏磁检测也具有一定的局限性，主要体现在对裂纹检测（尤其是轴向裂纹）的灵敏度不高，磁化器体积较大且不能区分内外壁缺陷几个方面。为解决这几个问题，本文采用了一系列的漏磁检测扩展技术针对性地提出了解决方案。作为研究着力点以及分析工具，我们建立了描述漏磁信号的模型，穿插在研究过程中。 在本文里，我们采用了任意方位缺陷的三维磁偶极子模...As one of the most widely used non-destructive testing (NDT) methods for ferromagnetic materials, magnetic flux leakage detection (MFL) method has many advantages such as easy quantification, high reliability, high efficiency and low pollution. However as with other NDT methods, MFL detection method itself also has imitations, mainly reflected in its poor anti-noise capacity, low sensitivity to cr...学位：工程硕士院系专业：航空航天学院_工程硕士(机械工程)学号：1992014115291
