| 瞬变电磁探测发射电流波形记录单元设计 |
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| 引用本文： | 周逢道,林君,朱凯光,周国华,刘长胜.瞬变电磁探测发射电流波形记录单元设计[J].吉林大学学报(工学版),2009,39(2). |
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| 作者姓名： | 周逢道 林君 朱凯光 周国华 刘长胜 |
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| 作者单位： | 吉林大学地球信息探测仪器教育部重点实验室,长春,130026 |
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| 基金项目： | “863”国家高技术研究发展计划项目(2002AA615030,2007AA09Z306) |
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| 摘 要： | 为削弱一次场的影响,减小探测盲区,需要记录发射电流波形。本文采用电流取样、前置放大及滤波、信号采集等技术,记录发射电流关断波形。实际测试结果表明:设计的电流记录单元能够完整、平滑地记录发射电流波形,记录的波形与示波器观测到的发射电流波形一致,电流采集精度高。
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| 关 键 词： | 测绘仪器 瞬变电磁 发射机 关断时间 阶跃函数 |
Design of transmit current recorder of transient electromagnetic detection system |
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| ZHOU Feng-dao,LIN Jun,ZHU Kai-guang,ZHOU Guo-hua,LIU Chang-sheng.Design of transmit current recorder of transient electromagnetic detection system[J].Journal of Jilin University:Eng and Technol Ed,2009,39(2). |
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| Authors: | ZHOU Feng-dao LIN Jun ZHU Kai-guang ZHOU Guo-hua LIU Chang-sheng |
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| Affiliation: | Key Lab of Geo-Information Exploration & Instrumentation;Ministry of Education;Jilin University;Changchun 130026;China |
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| Abstract: | To weaken the effect of the primary field and reduce the blind zone of exploration,the transmitting waveform needs to record.In this paper a recording unit is designed,which records the transmitting current by current sampling,preamplifying and filtering,and signal sampling.The test results show that the designed recording unit can fully and smoothly memorize the transmitting current waveform,which has the similar shape to the display waveform on the oscillograph with higher sampling precision. |
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| Keywords: | instrument of surveying and mapping transient electromagnetic transmitter turn off time current recorder |
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