基于射频信号反射特性的金属塑性变形评估

摘要

This paper proposed a method resulting from electromagnetic properties variation for metal plastic deformation monitoring.Firstly,the influences of electromagnetic parameters (permea-bility,conductivity)on the radio-frequency reflection features of the metal plate samples were simula-ted.Energy distribution of radio-frequency varies obviously due to electromagnetic properties variation according to the simulation results.Experiments were conducted to verify simulation results.The re-sults of the experiments indicate that the reflected radio-frequency signal strength decreases with pro-gressive plastic deformation in metal,which has been in conformity with simulations.%提出了一种根据电磁特性变化对金属塑性变形进行监测的研究方法。首先，针对金属试样的电磁参数(磁导率、电导率)变化对射频反射特性的影响进行仿真，仿真结果表明，电磁特性与射频能量分布有着明显的相关性。然后，通过试验对仿真结果进行验证，试验结果表明，随着塑性变形程度的加剧，反射的射频信号强度将会逐渐减小，与仿真结果相符。