一个基于电压控制放大器的高动态半空中短暂电磁接收系统的设计方案
Fei Teng1, Hualiang Wang1, Qi Yu1
1Key Laboratory for Geophysical Instrument of Ministry of Education, Changchun 130061, China and College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China.
The Review of scientific instruments
|December 8, 2023
概括
一个新的高动态半空中短暂电磁 (HDSATEM) 接收系统通过增加信号强度来增强深层地下勘探. 与标准的SATEM系统相比,这种进步使探测深度提高了50%以上.
科学领域:
- 地质物理学 地质物理学
- 电磁主义 电磁主义
- 勘探地质物理学 地质物理学
背景情况:
- 半空中短暂电磁 (SATEM) 技术对于地下勘探至关重要,但受到信号减弱和噪声的影响,限制了深度目标检测.
- 信号强度随着深度的增加而呈指数级下降,高电磁噪声环境会损害深度信息解释的精度.
研究的目的:
- 开发和评估一个高动态的半空中短暂电磁 (HDSATEM) 接收系统,以增强晚期SATEM信号强度和提高检测能力.
- 解决传统SATEM系统在深度勘探和噪音环境中的局限性.
主要方法:
- 开发了一个HDSATEM接收系统,其中包含一个由功率发生器调节的电压控制放大器 (VCA).
- 使用模拟模型来分析动态范围,并使用实验室测试来验证放大性能和信号恢复.
- 进行实地实验,将HDSATEM与标准的SATEM和受控源音频磁电电流 (CSAMT) 系统进行比较.
主要成果:
- HDSATEM接收系统显示晚期SATEM信号强度增加.
- 实验室测试证实了系统的放大性能和信号恢复能力.
- 现场实验显示,与标准SATEM系统相比,HDSATEM的检测深度的性能改善超过了50%.
结论:
- 开发的HDSATEM接收系统有效地增强了深层地下探测能力.
- HDSATEM系统比标准的SATEM系统有显著的改进,特别是在具有挑战性的勘探场景中.
- 这项技术有望在城市地下空间,水文地质学和矿物勘探中进行更精确和更深入的调查.
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