| 一种新型瞬变电磁发射机去过冲系统设计 |
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| 引用本文： | 韩冰,于生宝,孙晗.一种新型瞬变电磁发射机去过冲系统设计[J].工矿自动化,2014(3). |
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| 作者姓名： | 韩冰 于生宝 孙晗 |
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| 作者单位： | 吉林大学仪器科学与电气工程学院; |
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| 基金项目： | “十一五”国家高技术研究发展计划子课题(2006AA06A205) |
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| 摘 要： | 针对瞬变电磁发射机发射电流过冲造成探测盲区的问题,提出了一种新型瞬变电磁发射机去过冲系统设计方案。该方案在发射线圈两端并联一个优化的RLC二阶电路,在发射电流下降到接近零时接通该电路,让发射电流按指数衰减,从而有效去除电流过冲。仿真与实验结果表明,该方案能够去除发射电流的过冲振荡,减小探测盲区。
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| 关 键 词： | 瞬变电磁法 发射机 探测盲区 电流过冲 欠阻尼振荡 二阶电路 |
Design of a new type of overshoot elimination system of transient electromagnetic transmitter |
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| Abstract: | In view of problem of detection blind area caused by overshoot of transmitting current of transient electromagnetic transmitter,the paper proposed a design scheme of a new type of overshoot elimination system of transient electromagnetic transmitter.An optimal RLC second-order circuit is paralleled at two ends of transmitting coil,the circuit is connected when the transmitting current decreases close to zero,which makes the transmitting current accord to exponential decay,so as to eliminate currentovershoot effectively.The simulation and experiment results show that the scheme can eliminate overshoot oscillation of the transmitting current and reduce detection blind area. |
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| Keywords: | transient electromagnetic method transmitter detection blind area current overshoot underdamped oscillation second-order circuit |
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