The nonlinear interpolation method is used to compensate the influence of pipe grade and pipe material property ; tool velocity effects are compensated by the fourier transformation and optimal filter theory 研究用非线性插值技术对管道厚度和材质的影响进行补偿，实现了用傅立叶变换和最优滤波方法来消除检测仪移动速度对漏磁信号的影响，并取得了实验验证。
