基于场线耦合理论的电爆装置射频感应电流仿真研究

RF Induced Current Simulation of Electro-explosive Device Based on Field Coupling to Line Theory

针对有效天线口径法只能分析最危险情况下电爆装置射频安全性的不足,采用场线耦合理论进行一般情况下平行脚线电爆装置的射频危害分析。首先,分析射频危害能量与电爆装置的耦合机理。然后,在此基础上推导得到电爆装置射频感应电流的数学表达式。最后,通过数值仿真得到,对于一定的电爆装置物理参数,存在使感应电流最大的入射方向和入射频率;对于一定的电磁场入射条件,随着脚线间距的增加,感应电流变大,随着桥丝电阻的增大,感应电流变小。仿真结果表明,场线耦合理论可以为电爆装置射频危害分析提供一种新的方法。

The RF hazard analysis of electro-explosive device,with parallel pins,was carried out based on field coupling to line theory which suits common situation,instead of effective antenna aperture method which suits the most dangerous situation.Firstly,the coupling mechanism of RF hazard energy and electro-explosive device was analyzed.Then,the formula of RF induced current was given based on the first step.Lastly,some useful conclusions were drawn by means of numerical simulation.For a certain dimension of electro-explosive device,there are the incident direction and incident frequency which make the induced current maximum.For a certain incident condition of electromagnetic field,the induced current becomes large with the increase of distance between the pins and becomes small with the increase of resistance of bridge wire.The simulation results show that the field coupling to line theory will be a new method for the RF hazard analysis of electro-explosive device.