刘勇, 查明, 饶斯韬, 等. 极低频发射系统关键技术的研究与实现[J]. 中国舰船研究, 2021, 16(6): 116–123, 182. doi: 10.19693/j.issn.1673-3185.02018
引用本文: 刘勇, 查明, 饶斯韬, 等. 极低频发射系统关键技术的研究与实现[J]. 中国舰船研究, 2021, 16(6): 116–123, 182. doi: 10.19693/j.issn.1673-3185.02018
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LIU Y, ZHA M, RAO S T, et al. Key technologies study and implementation of extreme low frequency transmission system[J]. Chinese Journal of Ship Research, 2021, 16(6): 116–123, 182. doi: 10.19693/j.issn.1673-3185.02018
Citation: LIU Y, ZHA M, RAO S T, et al. Key technologies study and implementation of extreme low frequency transmission system[J]. Chinese Journal of Ship Research, 2021, 16(6): 116–123, 182. doi: 10.19693/j.issn.1673-3185.02018
shu

极低频发射系统关键技术的研究与实现

Key technologies study and implementation of extreme low frequency transmission system

    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。

     

    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.

     

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