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时域航空电磁系统(AEM)的发射电流波形,在地面由于散热、电源功率等因素限制,无法直接测量全功率下的大电流波形.本文针对这一问题,提出了通过测量地面异常线圈的小幅值感应电流,建立地面异常线圈感应电流与空中发射线圈的发射电流关系,采用反卷积算法提取发射机电流波形.通过仿真数据和地面实验进行算法验证,将实验测量数据还原的发射机电流和实际发射机电流对比,结果表明感应电流采集装置的传递函数、不同观测位置的测量精度对还原发射波形具有一定影响,当空中发射线圈与地面异常线圈共中心时,产生的感应电流幅值最大,还原出的发射机电流与实际电流波形误差最小.
The emission current waveform of time-domain AEM can not directly measure the large current waveform at full power due to the limitation of heat dissipation, power supply, etc. In this paper, Amplitude induced current, the relationship between the induced current of the ground anomalous coil and the transmitting current of the air transmitting coil is established, and the transmitter current waveform is extracted by using the deconvolution algorithm.According to the simulation data and the ground test algorithm validation, the experimental measurement data to restore the transmitter current Compared with the actual transmitter current, the results show that the transfer function of the inductive current collecting device and the measurement accuracy of different observing positions have an impact on the reduction of the transmitted waveform. When the aerial transmitting coil and the ground anomaly coil are coaxial, the induced current amplitude is the largest , The reduction of the transmitter current and the actual current waveform error minimum.