极低频发射系统关键技术的研究与实现

刘勇; 查明; 饶斯韬; 李纵; 李文彬

doi:10.19693/j.issn.1673-3185.02018

极低频发射系统关键技术的研究与实现

doi: 10.19693/j.issn.1673-3185.02018

武汉船舶通信研究所低频电磁通信技术实验室，湖北武汉 430205

基金项目: 国家重点研发计划资助项目（2019YFC1510804）

详细信息

作者简介:
刘勇，男，1968年生，硕士，研究员，集团公司高级技术专家

查明，男，1974年生，硕士，研究员

饶斯韬，男，1971年生，硕士，高级工程师

李纵，男，1985年生，硕士，高级工程师

李文彬，男，1984年生，硕士，高级工程师

通信作者:
查明

中图分类号: U665.2；P631.325
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- 被引次数: 0
出版历程
- 收稿日期: 2020-06-28
- 修回日期: 2020-10-24
- 网络出版日期: 2021-11-12
- 刊出日期: 2021-12-20

Key technologies study and implementation of extreme low frequency transmission system

LF Electromagnetic Communication Technology Laboratory, Wuhan Maritime Communication Research Institute, Wuhan 430205, China

极低频发射系统关键技术的研究与实现由刘勇，等创作，采用知识共享署名4.0国际许可协议进行许可。

摘要

摘要: 目的发射可覆盖我国领土和主要领海的高信噪比极低频信号可为开展地下资源探测和地震预报等探索性研究及工程试验研究提供辐射信号服务。方法论述水平低架天线辐射极低频信号的基本原理，介绍极低频发射系统的组成，研究极低频大功率放大、水平天线调谐、强电磁场集散检测控制等关键技术，研制构建世界首个民用极低频发射台，并开展数千公里远距离场强测试。结果结果表明，极低频信号可覆盖我国国土和主要领海，比天然源信号高出10~20 dB，探测深度可达10 km。结论研制的极低频发射台可为地质探测、地震预测跨学科研究提供新的公用性、开放性服务平台，将推动我国低频无线电、空间物理和地球物理等基础学科的发展。
- 极低频大功率发射 /
- 水平低架天线 /
- 信噪比 /
- 无线电磁探测
Abstract: Objectives Transmitting extreme low frequency (ELF) signals with a high signal-noise ratio (SNR) to cover Chinese territory and major territorial sea areas can provide a radiating signal service for trial and exploratory research projects such as underground resource sounding, seismic prediction, etc. Methods This paper explains the primary principle of horizontal low-profile antennae in radiating ELF signals, introduces ELF transmission system composition, analyzes key technologies such as ELF power amplification, horizontal antennae tuning, detection and control of strong power electromagnetic fields, composite lightning-proof measures, etc., and designs and constructs the first-ever civilian ELF transmission station in the world, through which long-range field tests and trials with a coverage of thousands of kilometers are accomplished. Results The test and trial results indicate that ELF signals can cover Chinese territory and major territorial sea area 10-20 dB higher than natural signals, with a sounding depth of up to 10 km. Conclusions The ELF transmission station can provide a brand-new open public platform for research on geological exploration and seismic prediction, thereby contributing to the development of primary disciplines in China including low-frequency radioactivity, space physics, geophysics, etc.
- ELF large power transmission /
- horizontal low-profile antennae /
- signal-noise ratio /
- wireless electro-magnetic detection

HTML全文

图 1 极低频发射系统工作示意图

Figure 1. Schematic diagram of ELF transmission system

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图 2 水平低架天线辐射原理

Figure 2. Radiation principle of horizontal low-profile antennae

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图 3 极低频发射系统结构框图

Figure 3. Block diagram of the ELF transmission system

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图 4 发射主机功率放大原理图 ^{[
14]}

Figure 4. Schematic diagram of power amplifier for the primary transmitter ^{[
14]}

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图 5 两个频段的8路激励信号对应关系图

Figure 5. The relation diagram of eight-channel excitation signals of two frequency bands

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图 6 正弦脉宽调制的仿真电压和电流波形

Figure 6. The voltage and current waveforms simulated by SPWM

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图 7 天线调谐原理图

Figure 7. Schematic diagram of antennae tuning

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图 8 强电磁场环境的控制系统组成

Figure 8. Composition of control system for strong power electromagnetic fields

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图 9 国内陆上场强测试地点

Figure 9. Sites of strength measurement for domestic onshore field

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图 10 极低频场强测试设备连接图

Figure 10. Connection diagram of ELF field strength testing devices

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图 11 数据处理流程示意图

Figure 11. Flow chart of data processing

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图 12 西北1 500 km距离5.766 Hz极低频电场和磁场频谱

Figure 12. Electric and magnetic field spectra of 5.766 Hz ELF at a distance of 1 500 km in Northwest China

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图 13 西北3 000 km距离新疆奎屯5.766 Hz电场和磁场频谱

Figure 13. Electric and magnetic field spectra of 5.766 Hz ELF at a distance of 3 000 km in Kuitun, Xinjiang, Northwest China

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图 14 7 000 km距离11.2 Hz和27.9 Hz的极低频磁场频谱

Figure 14. Magnetic field spectra of 11.32 Hz and 27.9 Hz ELF at a distance of 7 000 km onshore

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图 15 1 300 km距离大陆架水下200~300 m的极低频信号频谱

Figure 15. Signal spectra of continental shelf in the water depth of 200-300 m at a distance of 1 300 km

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16

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图 16 泌阳油田电磁场频谱数据

Figure 16. Electromagnetic spectra data obtained by source detection in Biyang oil field

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