基于交变电磁场的钢板表面裂纹检测方法

Steel Surface Defect Detection Method Based on Alternating Current Field Measurement

针对钢板表面裂纹检测的问题,提出了交变电磁场的检测方法。研究了交变电磁场检测原理,建立了交变电磁场仿真模型,通过改变钢板表面裂纹深度等条件,分析计算了裂纹处磁场强度分布。对不同深度钢板裂纹的实验数据进行分析,实验结果表明,在相同实验条件下,随检测深度的增加,检测信号峰值增长正比于裂纹深度,检测最大深度为5 mm。

For the problem that steel surface cracks was defected,alternating current field measurement was proposed. The principle of alternating current field measuremen was studied,a Comsol electromagnetic simulation model was set up and calculated by changing the conditions of the steel surface crack depth and magnetic field intensity distribution of defects were analyzed.According to the simulation results of the design experiments,under the same experimental conditions,with the increase of the depth of detection,the detection signal peak is proportional to the depth of the crack growth,the maximum detection depth is 5mm.