一种新型瞬变电磁仪发射电路设计

徐亚昆; 李国才; 赵振廷; 连崑

doi:10.13272/j.issn.1671-251x.2014.07.009

一种新型瞬变电磁仪发射电路设计

doi: 10.13272/j.issn.1671-251x.2014.07.009

徐亚昆^{1, 2},
李国才^{1, 2},
赵振廷^{1, 2},
连崑^{1, 2}

1.
太原理工大学信息工程学院微纳系统研究中心，山西太原030024
2.
太原理工大学新型传感器与智能控制教育部和山西省重点实验室，山西太原030024

基金项目:

山西省科技重大专项项目（20121101004）

山西省高等学校特色重点学科建设项目（晋教财［2012］45号）

详细信息

中图分类号: TD67
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出版历程
- 刊出日期: 2014-07-10

Design of a novel transmission circuit of transient electromagnetic instrument

XU Yakun ^{1, 2},
LI Guocai^{1, 2},
ZHAO Zhenting^{1, 2},
LIAN Kun^{1, 2}

1.
Micronano System Research Center, College of Information Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
Key Laboratory of Advanced Transducers and Intelligent Control of Sha

摘要

摘要: 为提高瞬变电磁仪测量的准确度，设计了基于FPGA的瞬变电磁仪发射电路。该电路采用EXB841模块设计驱动电路，实现对H桥路上下臂MOSFET的有效驱动；利用改进的H桥路设计及改变传统桥路的控制策略，实现对MOSFET的超短时间关断；采用RCD吸收保护电路降低尖峰电压干扰，改善发射电路输出波形。试验结果表明，该发射电路的发射信号过压仅为正常信号的1.33倍，振荡时间为500 ns，下降沿时间为700 ns，实现了发射电流的快速关断，且稳定性好。
- 瞬变电磁发射机 /
- 发射电路 /
- FPGA /
- 快速关断
Abstract: A transmission circuit of transient electromagnetic instrument based on FPGA was designed in order to improve measurement accuracy of transient electromagnetic instrument. Drive circuit of the transmission circuit was designed with module EXB841 to drive MOSFET located at up-down side of H-bridge, innovative H-bridge and control strategy realized very short turn-off time for MOSFET, and peak voltage interference was reduced by use of RCD protect circuit to improve output signal waves of the transmission circuit. The experiment results show that overvoltage of emission signal of the transient electromagnetic transmission circuit is only 1.33 times of the normal voltage, and the time for oscillating and falling edge are 500 ns and 700 ns, separately, which can realize fast turn-off and has good stability.
- transient electromagnetic transmitter /
- transmission circuit /
- FPGA /
- fast turn-off