提出一种涡流等效源方法 ,用于识别缺陷的位置、形状和大小。该方法用位于分界面上的多个等效线圈产生的场等效逼近因缺陷引起的扰动场 ,使逆问题的求解中每次需用数值方法求解正问题的过程转变为每次用解析法求解正问题。缺陷的重构速度比用体积分方程法提高十倍以上。直线裂缝和 T型裂缝的重构计算证明 ,本文方法是正确的和快速有效的 A vortex equivalent source method is proposed to identify the position, shape and size of defects. In this method, the field generated by multiple equivalent coils located on the interface is equivalently approximated by the perturbation field caused by the defect, so that the process of solving the positive problem by the numerical method in every solution of the inverse problem is transformed into a method of solving the positive problem by using analytical method Solve the problem. Defect reconstruction rate than using volume integral equation method to improve more than ten times. The reconstruction calculation of straight crack and T crack shows that the method in this paper is correct and fast and effective