漏磁检测的励磁装置优化设计

为了提高漏磁检测的灵敏度，利用ANSYS软件建立了漏磁检测励磁装置的三维有限元模型，研究了钢板的厚度、永磁体厚度、磁极面积以及磁化间隙等因素对钢板局部磁化效果的影响，得到了钢板磁化强度随永磁体几何参数改变时的变化规律，提出了永磁磁化方式下励磁装置优化设计的基本方法，对励磁装置各部分参数进行了优化设计．实验证明，优化设计的励磁装置能改善磁化效果，提高检测灵敏度．

Optimized Design of Magnetizing System in MFL

In order to improve the sensitivity of MFL testing,the 3D finite element model（FEM） of the magnetizing system is established by ANSYS software. The influences on the local magnetization of steel plate by steel plate thickness, permanent magnet thickness, magnet pole area and the distance from pole to plate surface are studied. Correlation curves are obtained for the magnetization intensity along with the geometric parameters of magnet. The basic method of magnetizing system optimization is obtained and the rules are used to optimize the parameters of the magnetizing system. Experimental result shows that the magnetizing system after optimization can improve the magnetization and sensitivity of MFL testing.