| 无人飞艇长导线源时域地空电磁勘探系统及其应用 |
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| 引用本文： | 嵇艳鞠, 王远, 徐江, 周逢道, 李肃义, 赵义平, 林君. 无人飞艇长导线源时域地空电磁勘探系统及其应用[J]. 地球物理学报, 2013, 56(11): 3640-3650, doi: 10.6038/cjg20131105 |
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| 作者姓名： | 嵇艳鞠 王远 徐江 周逢道 李肃义 赵义平 林君 |
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| 作者单位： | 1. 地球信息探测仪器教育部重点实验室/吉林大学仪器科学与电气工程学院, 长春 130026; 2. 国家地球物理探测仪器工程技术研究中心, 长春 130026; 3. 水利部牧区水利科学研究所, 呼合浩特 010020 |
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| 基金项目： | 国家自然科学基金;吉林省重大科技攻关项目(41174095和2012ZDGG003)资助 |
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| 摘 要： | 以无人飞艇作为载体的时域地空电磁探测系统,具有高效、低成本、勘探深度大和空间分辨率高等优点.本文基于二维有限差分方法,分析了长导线源地空电磁响应的特征和变化规律、以及飞行高度的影响;在此基础上,采用32位Cortex-M3内核处理器,以全差分模拟前端压制电磁干扰,实现了24位低噪声多通道海量电磁数据的同步采样及存储,研制了一套可搭载于无人飞艇的时域电磁接收系统,并基于Wi-Fi Mesh无线多跳网络实现了地面远程监控.通过分析飞艇发动机的电磁噪声特点,采用独立分量分析法进行实测数据的噪声去除.研制的地空电磁接收系统使用无人飞艇搭载,在江苏省南通市如东县和内蒙古巴彦宝力格地区进行了电磁探测实验,地空电磁勘探结果与地面瞬变电磁和大地电磁方法进行了对比,证明了地空电磁探测方法的有效性.无人飞艇时域地空电磁探测系统的成功飞行实验,为在我国草原沙漠地区、海陆交互地带、沼泽地带、无人山区等特殊景观地区开展矿产资源、水资源、地质灾害等电磁探测提供了新方法和新思路.
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| 关 键 词： | 无人飞艇 电性源地空电磁系统 二维有限差分 全差分放大 独立分量分析 |
| 收稿时间： | 2013-04-06 |
| 修稿时间： | 2013-06-28 |
Development and application of the grounded long wire source airborne electromagnetic exploration system based on an unmanned airship |
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| JI Yan-Ju, WANG Yuan, XU Jiang, ZHOU Feng-Dao, LI Su-Yi, ZHAO Yi-Ping, LIN Jun. Development and application of the grounded long wire source airborne electromagnetic exploration system based on an unmanned airship[J]. Chinese Journal of Geophysics (in Chinese), 2013, 56(11): 3640-3650, doi: 10.6038/cjg20131105 |
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| Authors: | JI Yan-Ju WANG Yuan XU Jiang ZHOU Feng-Dao LI Su-Yi ZHAO Yi-Ping LIN Jun |
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| Affiliation: | 1. Key Laboratory of Earth Information Detection Instruments, Ministry of Education/College of Instrument Science and Electrical Engineering, Jilin University, Changchun 130026, China; 2. National Engineering Research Center of Geophysics Exploration Instruments, Changchun 130026, China; 3. Postoral Areas Water Resources Research Institute of Ministry of Water Resources, Hohhot 010020, China |
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| Abstract: | The time-domain semi-airborne electromagnetic system mounted on an airship has outstanding efficiency, low costs and high depth of exploration. Using a 2D FDTD method, this study analyzes the characteristics and variation rules of grounded long wire source airborne electromagnetic responses, and the effect of flight altitude. A receiver is developed on an unmanned airship, using a 32bit MCU with the Cortex-M3 processor, reducing electromagnetic noise by placing a fully differential amplifier in the front of the analog circuit, and recording multi-channel signals synchronously with 24-bit resolution. To achieve ground remote control, we establish a high-speed communication network through WiFi-Mesh connection based on multi-hop topology. To reduce noise, a method based on ICA is used according to the characteristics of the engine noise analysis. We have carried out two survey tests in a region of Nantong and a pastoral area in Inner Mongolia using the developed receiver on the unmanned airship, and compared the exploration results using the grounded long wire source airborne electromagnetic system, TEM, and MT system. The results indicate that the grounded long wire source airborne electromagnetic method is practical and effective. With the successful flight tests of the developed system, it can be used as a new approach for investigations in deserts, costal beaches, swamps and mountains. |
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| Keywords: | Unmanned airship Grounded semi-airborne electromagnetic prospecting system 2D FDTD Fully differential amplify ICA |
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