金属板脉冲涡流检测的仿真研究

Simulation research on pulsed eddy current testing of metal plate

针对金属板轧制后不能方便、安全检测的问题,给出了一种脉冲涡流检测的方法。基于脉冲涡流检测的原理,利用ANSYS Maxwell有限元仿真软件建立模型,仿真分析了金属板厚度、激励电压峰值和激励电压脉冲上升下降时间与差分感应电压之间的关系。仿真结果表明,金属板越薄差分感应电压峰值越大。激励电压峰值越大,差分感应电压峰值也越大。激励电压脉冲上升下降时间越短,差分感应电压峰值越大,为实际应用提供一定的参考。

For the problem in the metal plate can not be conveniently and safely detected after rolling. A method of pulsed eddy current detection is given. Based on the principle of pulsed eddy current testing, Using ANSYS Maxwell finite element simulation software to establish the model, The relationship between the thickness of the metal plate, the peak value of the excitation voltage and the rising and falling time of the excitation pulse voltage and the differential induced voltage is simulated and analyzed.. Simulation results show: The thinner the metal plate, the greater the peak of the difference voltage is. The greater the peak value of the excitation voltage, the greater the peak value of the differential induced voltage. The shorter the rise and fall time of the excitation voltage pulse, the greater the peak value of the differential induced voltage. Provide a reference for practical applications.