| 多孔径瞬变电磁场物理模拟 |
| |
| 引用本文： | 李貅,薛国强,全红娟.多孔径瞬变电磁场物理模拟[J].地球物理学进展,2009,24(3):1088-1094. |
| |
| 作者姓名： | 李貅 薛国强 全红娟 |
| |
| 作者单位： | 1. 长安大学地质工程与测绘工程学院,西安,710054
2. 中国科学院地质与地球物理研究所,北京,100029 |
| |
| 基金项目： | 国家重点自然科学基金，中国科学院知识创新工程重要方向项目 |
| |
| 摘 要： | 为了提高瞬变电磁法对地探测精度,提出了一种新颖的瞬变电磁装置一多孔径发射装置,并进行了多孔径瞬变电磁场物理模拟观测.分别使用四孔径发射装置和常规回线发射装置,进行不同收一发距情况下的一次场观测,并对铜板在不同埋藏深度情况下的二次响应进行观测,通过比较两种不同装置下的响应曲线和计算观测数据误差,最终发现使用四孔径发射装置可使一次场强度提高34%,可使二次场强度提高31%.结论表明,多孔径发射源可以改变电磁场的空间分布,认为瞬变电磁场存在类相干现象.研究成果对提高瞬变电磁的探测精度具有很重要的意义.
|
| 关 键 词： | 瞬变电磁 多孔径 模型测试 |
| 收稿时间： | 2008-9-12 |
| 修稿时间： | 2008-12-28 |
Physical simulation of the Multi-aperture TEM field |
| |
| LI Xiu,XUE Guo-qiang,QUAN Hong-juan.Physical simulation of the Multi-aperture TEM field[J].Progress in Geophysics,2009,24(3):1088-1094. |
| |
| Authors: | LI Xiu XUE Guo-qiang QUAN Hong-juan |
| |
| Abstract: | In order to improve the resolution of TEM to detect buried targets, a new multi-aperture transient electromagnetic survey configuration is introduced and used to survey TEM response in this paper. Both of multi-aperture system and normal TEM configuration in the condition of different receiver-transmitter distances are used to observe the primary field and secondary field corresponding to copper-plate. The response curves and the surveyed data error of two kinds of configuration are compared. It has been found that the multi-aperture transmitter system can improve the primary filed intensity higher more than 34%, and bring the secondary field response high more than 31%. The survey result shows that the multi-aperture TEM transmitter configuration can really change the distribution of magnetic field. It is suggested that there really exists the phenomenon of TEM field coherent-like .It is of significance to improve the precision of TEM data. |
| |
| Keywords: | transient electromagnetic multi-aperture model test |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学进展》浏览原始摘要信息 |
| 点击此处可从《地球物理学进展》下载免费的PDF全文 |
|
