CHTEM-I直升机时间域航空电磁发射系统研究
发布时间：2018-08-25 08:38
【摘要】：提出一种直升机时间域航空电磁发射系统,采用PWM调制技术实现梯形波发射波形的上升沿及平顶段电流可控,提高输出电流的控制精度,解决上升沿、下降沿拖尾的问题,并利用软硬件相结合的方法消除下降沿过冲;研究大功率器件的并联技术和软关断技术,实现大功率器件的动、静态均流;设计双闭环稳压电源,提高发射电流波形的稳定性,改善一次场质量;将CHTEM-I系统应用于野外测试。研究结果表明:CHTEM-I系统的发射磁矩达254 469 A·m~2,发射电流上升时间小于2.2 ms,峰值为500 A,下降沿关断时间小于1 ms,具有发射磁矩大、信噪比高、波形稳定性好、反应深层地质信息能力强的特点。
[Abstract]:A helicopter time-domain aero-electromagnetic launch system is proposed. The rise edge and flat-top current of trapezoidal wave emission waveform are controlled by PWM modulation technology. The control accuracy of output current is improved, and the problems of rising edge and falling edge trailing are solved. And using the method of combining software and hardware to eliminate the overshoot of drop edge; to study the parallel technology and soft turn-off technology of high-power devices, to realize the dynamic and static current sharing of high-power devices; to design a double-closed-loop power supply for stabilizing voltage, to improve the stability of the transmitting current waveform, Improve the quality of primary field and apply CHTEM-I system to field test. The results show that the emission magnetic moment of the 1: CHTEM-I system is 254,469A mm2, the rising time of emission current is less than 2.2 ms, the peak value is 500A, and the down-turn off time is less than 1 ms, which has the advantages of large emission magnetic moment, high signal-to-noise ratio and good waveform stability. The ability of reflecting deep geological information is strong.
【作者单位】： 吉林大学仪器科学与电气工程学院;中国国土资源航空物探遥感中心;
【基金】：国家高技术研究发展计划(863计划)项目(2013AA063904-1)~~
【分类号】：P631.326
本文编号：2202349
[Abstract]:A helicopter time-domain aero-electromagnetic launch system is proposed. The rise edge and flat-top current of trapezoidal wave emission waveform are controlled by PWM modulation technology. The control accuracy of output current is improved, and the problems of rising edge and falling edge trailing are solved. And using the method of combining software and hardware to eliminate the overshoot of drop edge; to study the parallel technology and soft turn-off technology of high-power devices, to realize the dynamic and static current sharing of high-power devices; to design a double-closed-loop power supply for stabilizing voltage, to improve the stability of the transmitting current waveform, Improve the quality of primary field and apply CHTEM-I system to field test. The results show that the emission magnetic moment of the 1: CHTEM-I system is 254,469A mm2, the rising time of emission current is less than 2.2 ms, the peak value is 500A, and the down-turn off time is less than 1 ms, which has the advantages of large emission magnetic moment, high signal-to-noise ratio and good waveform stability. The ability of reflecting deep geological information is strong.
【作者单位】： 吉林大学仪器科学与电气工程学院;中国国土资源航空物探遥感中心;
【基金】：国家高技术研究发展计划(863计划)项目(2013AA063904-1)~~
【分类号】：P631.326
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