航空瞬变电磁法组合波脉冲电流发射电路  

Aero Transient Electromagnetic Combined Wave Pulse Current Emitter Circuit

作　　者：刘磊[1] 李军峰[1] 吴珊[1] 刘俊杰[1] 王浩 曹展宏 LIU Lei;LI Jun-feng;WU Shan;LIU Jun-jie;WANG Hao;CAO Zhan-hong(Institute of Geophysical and Geochemical Exploration,CAGS,Key Laboratory of Geophysical EM Probing Technologies,Ministry of Natural Resources,Langfang 065000,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,自然资源部地球物理电磁法探测技术重点实验室,河北廊坊065000

出　　处：《仪表技术与传感器》2020年第10期114-116,共3页Instrument Technique and Sensor

基　　金：国家重点研发计划(2017YFC0601900);中国地质调查局项目(DD20201179)。

摘　　要：电磁发射机是瞬变电磁(TEM)探测系统的重要组成部分。在航空瞬变电磁法中,针对低供电电压、多匝发射线圈(低电阻、大电感)的特点,基于谐振原理设计了一种航空瞬变电磁法组合波脉冲电流发射电路,不仅能有效地控制发射波形的边沿,而且利用了关断瞬间电感的储能,提高了发射机的效率,实现了大磁矩发射。文中详细介绍了该电路的设计思路,重点分析了发射波形的控制逻辑。经过测试,该发射电路的电流峰值达到640 A,峰值发射磁矩达到54万A·m^2。Electromagnetic transmitter is an important part of the transient electromagnetic(TEM)detection system.In the aviation transient electromagnetic method,aiming at the characteristics(low resistance,large inductance)of low power supply voltage and multi turn coils,based on the principle of resonance oscillation,an aero transient electromagnetic combined wave pulse current emitter circuit was designed.It not only effectively controls the edge of the transmitting waveform,but also utilizes the stored energy of the instaneous inductance in turn off.It improves the efficiency of the transmitter and large magnetic torque emission is realized.In this paper,the design idea of the circuit is introduced in detail,and the control logic of the emission waveform is analyzed emphatically.After testing,the current peak of the emission circuit reaches 640 A and the peak emission magnetic moment reaches 540 thousand A·m^2.

关 键 词：瞬变电磁法 发射机 脉冲电流 谐振 磁矩 电源 

分 类 号：P631[天文地球—地质矿产勘探]