| 摘要: |
| 针对水平方向地电极电流场无线强穿透信息传输需求，研究了基于极低频水平双电极电流场信道传输特性。考虑到电极半径、电极入土深度、电极间距、发射信号频率和信号传输距离等参数对透地（Through-The-Earth,TTE）通信传输性能的影响，建立了地电极电流场TTE通信路径损耗模型，分析了各参数对路径损耗的影响，确定了信号传输最佳工作参数。根据选定参数搭建了极低频电流场TTE通信系统，在200 m和400 m通信距离下测试了3~10 Hz信号的路径损耗，通过试验数据与仿真结果对比分析验证了模型的准确性。 |
| 关键词: 隧道救援 透地通信 地电极电流场 极低频 路径损耗模型 |
| DOI：10.20079/j.issn.1001-893x.221008003 |
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| 基金项目:国家重点研发计划（2020YFC1511701）；北京市优秀人才资助计划青年拔尖项目（2016000026833ZK08） |
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| Path Loss Modeling and Analysis Based on Extremely Low Frequency Current Field Through-The-Earth Communications |
| XU Zhan,WEN Xiaowen,ZHANG Gan |
| (1.School of Information and Communication Engineering,Beijing Information Science and Technology University,Beijing 100101,China;2.School of Automation,Beijing Information Science and Technology University,Beijing 100192,China;3.School of Mechatronic and Information Engineering,China University of Mining and TechnologyBeijing,Beijing 100083,China) |
| Abstract: |
| For the problem of wireless strong penetration information transmission requirement of horizontal ground electrode current field,the transmission characteristics of horizontal two-electrode current field channel based on extremely low frequency are studied.Considering the influence of electrode radius,electrode depth,electrode spacing,transmitting signal frequency and signal transmission distance on transmission performance of Through-The-Earth(TTE) communications,the TTE communication path loss model based on the current field of the ground electrode is established,the influence of various parameters on the model is analyzed,and the optimum working parameters of signal transmission are determined.According to the selected parameters,a TTE communication system based on extremely low frequency current field is built,and the path loss of 3~10 Hz signal is tested at 200 m and 400 m communication distances.The accuracy of the model is verified by comparing and analyzing the test data and simulation results. |
| Key words: tunel rescue Through-The-Earth(TTE) communications ground electrode current field extremely low frequency path loss model |
