瞬态强电磁场传感器时域联合校准研究

Research on a Time-domain Joint Calibration for Transient Intense Electromagnetic Field Sensors

由于连续波幅值限制、额外时-频转换等问题,IEEE Std 1309-2013中的频域校准方法很难应用到瞬态强电磁场传感器的校准上,为此提出了一种更加适用的时域联合校准方法。经过分析,在时域校准中,可以采用脉冲上升沿来等效时域校准中的频带宽度,利用不同幅值的脉冲信号进行激励后得到的校准系数在时域和频域校准中也是相同的。根据标准电磁场产生装置场强均匀性和上限频率的差异,时域联合校准方法采用镜面单锥进行上升沿校准,采用TEM小室进行传感器系数校准,并详细介绍了其校准及操作流程。

Due to the amplitude limitation of continuous wave and additional time-frequency conversion issues,it is difficult to apply the frequency domain calibration method proposed in IEEE Std 1309-2013 to the calibration of transient intense electromagnetic field sensors.Therefore,a more appropriate time-domain joint calibration method is developed.After analysis,in the time domain calibration,the rising edge of the pulse can be used to represent the bandwidth in the time domain calibration.The calibration coefficient obtained after excitation with pulse signals of different amplitudes are also the same in the time domain and frequency domain calibration.According to the difference in field uniformity and upper frequency limit of standard electromagnetic field generation devices,the time-domain joint calibration method uses a mirror single cone for rising edge calibration,and a TEM cell for sensor coefficient calibration,and the calibration and operation process of the time-domain joint calibration method is introduced detailly.