时间域电磁探测发射电流过冲产生原理及抑制

doi:10.7964/jdxbgxb201304029

Abstract

Abstract:

In the time domain electromagnetic detection system, emission current overshoot can cause receiving blind area. In order to solve this problem, AC equivalent models of current overshoot produce and inhabitation are established. The circuit theory is applied to the analysis of the proposed model, and a method of accelerating resistance increase and damping of overshoot current oscillation is put forward. As a result the time domain electromagnetic detection transmitter can be improved. Experiments show that the improved system is still stable and reliable; early signal of wave is advanced by 100 ?s, thus reducing the detection blind area. The proposed method provides hardware premise for current waveform features of time domain electromagnetic detection. It also provides reference for the design of electromagnetic instruments on unmanned aerial vehicles.

Key words: instrument of surveying and mapping, electromagnetic detection, time domain electromagnetic methods, accelerate resistance, current overshoot, blind area of detection

CLC Number:

TH763

ZHOU Feng-dao, TANG Hong-zhong, GUO Xin, WANG Jin-yu. Current overshoot produce principle and inhibition of transmitter of time domain electromagnetic detection system[J].吉林大学学报(工学版), 2013, 43(04): 1023-1028.

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Current overshoot produce principle and inhibition of transmitter of time domain electromagnetic detection system

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