缺陷对铁磁材料内部磁畴壁的钉扎使得缺陷附近出现不依赖于外部磁场变化的微磁固定结点。针对该现象,从微磁学理论计算出发,通过能量最小原理分析了缺陷附近内部能量的变化,得出了缺陷附近微磁固定结点内磁化场的奇异分布,根据其分布特征实现了缺陷检测。 The pinning of the magnetic domain wall inside the ferromagnetic material by the defect makes the micro-magnetic fixed node near the defect independent of the change of the external magnetic field. In view of this phenomenon, based on the calculation of the micro-magnetism theory, the energy variation inside the vicinity of the defect is analyzed by the principle of minimum energy, and the singular distribution of the magnetization field in the fixed point of the micro-magnetism near the defect is obtained. Based on the distribution characteristics, the defect detection .