钢管漏磁检测设备性能的改进

针对钢管漏磁检测设备检测时信号信噪比较低的问题,根据实际的漏磁检测设备规格参数,采用有限元仿真方法进行励磁优化设计,获得最佳的信噪比.通过加装磁路的措施来消除端部检测时的信号畸变现象,分析了磁路闭合状态对漏磁信号幅度和各个分量的影响.并通过对Hall探头加装导磁铁板的方法,提高探头检测灵敏度.仿真数据同实验结果基本吻合,有效地提高了漏磁检测设备的性能.

Performance improvement of MFLT equipment for steel tube

Aimed at the problem that the signal-to-noise ratio is low with common magnetic flux leakage(MFL) testing equipment for steel pipe,the finite element method is used to optimize the design on the exciters in terms of the actual parameters of testing equipment in this paper.Two improvement measures are presented and their effects are validated by simulation results and experimental data.The thin iron plate with high permeability is taken as auxiliary magnetic path surrounding the Hall sensors and the coils,which can greatly eliminate the distortion of signals in testing at the end of steel pipe.Two blocks of iron plates with high perme-ability are set on each Hall sensor surface,which improves the sensor’s capability of picking up the z component of magnetic flux leakage(MFL) signals.The performance of MFL testing equipment can be efficiently improved with proposed methods.