Measurement of UWB signal path loss and center frequency selection in underground coal mines
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摘要: 煤矿井下分别部署UWB，5G，WiFi6等系统，存在基站多、传输线缆多、供电设备多、系统成本高、维护工作量大等问题。将UWB，5G，WiFi6等集成在同一个一体化基站或分站内，可有效解决上述问题，但一体化基站的UWB，5G，WiFi6天线之间距离近，相互干扰大。选择不同的工作频段，是解决一体化基站的UWB，5G，WiFi6天线之间相互干扰大的有效方法。为与地面设备兼容，矿用WiFi6和5G工作频段选择范围较小，UWB工作频段选择范围较大。目前矿井人员和车辆定位系统主要采用UWB主流芯片DW1000，其中心频率为3.5，4.0，4.5，6.5 GHz。中心频率为3.5 GHz的UWB与3.5 GHz的5G工作频段相近，不宜选用。中心频率为4.0，4.5，6.5 GHz的3个频段的UWB，均与5G和WiFi6频段不相近，可选择其中衰减较小的频段作为矿用UWB中心频率。煤矿井下测试结果表明，4.0 GHz信号的路径损耗最小，在其他条件相同的情况下，传输距离最远，既解决了UWB与5G和WiFi6相互干扰的问题，又减少了基站数量和系统成本，便于使用与维护。因此，UWB中心频率应优选4.0 GHz。Abstract: The deployment of UWB, 5G and WiFi6 systems underground in coal mines has problems such as multiple base stations, multiple transmission cables, multiple power supply equipment, high system costs, and heavy maintenance workload. Integrating UWB, 5G and WiFi6 antennas into the same integrated base station or sub station can effectively solve the above problems. However, the distance between UWB, 5G and WiFi6 antennas in the integrated base station is close, resulting in high mutual interference. Choosing different operating frequency bands is an effective method to solve the high mutual interference between UWB, 5G and WiFi6 antennas in integrated base stations. To be compatible with ground equipment, the selection range of mining WiFi6 and 5G operating frequency bands is relatively small, while the selection range of UWB operating frequency bands is relatively large. At present, the positioning system for mine personnel and vehicles mainly uses the UWB mainstream chip DW1000, with a center frequency of 3.5, 4.0, 4.5 and 6.5 GHz. The UWB with a center frequency of 3.5 GHz is similar to the 5G operating frequency band of 3.5 GHz. It is not suitable for selection. The three frequency bands of UWB with center frequencies of 4.0, 4.5 and 6.5 GHz are not similar to the 5G and WiFi 6 frequency bands. The frequency band with smaller attenuation can be selected as the center frequency of the mining UWB. The underground testing results of coal mines show that the path loss of the 4.0 GHz signal is the smallest, and the transmission distance is the farthest under the same other conditions. This not only solves the problem of interference between UWB, 5G and WiFi6, but also reduces the number of base stations and system costs. It is easy to use and maintain. Therefore, the UWB center frequency should preferably be 4.0 GHz.
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Key words:
- wireless transmission in mines /
- wireless transmission attenuation /
- working frequency band /
- path loss /
- center frequency /
- UWB /
- 5G /
- WiFi6
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图 6 4.0 GHz信号在不同巷道各空间点位路径损耗
Figure 6. Path loss at each spatial points of 4.0 GHz signal in different roadways
图 7 4.5 GHz信号在不同巷道各空间点位路径损耗
Figure 7. Path loss at each spatial points of 4.5 GHz signal in different roadways
图 8 5.5 GHz信号在不同巷道各空间点位路径损耗
Figure 8. Path loss at each spatial points of 5.5 GHz signal in different roadways
图 9 6.0 GHz信号在不同巷道各空间点位路径损耗
Figure 9. Path loss at each spatial points of 6.0 GHz signal in different roadways
表 1 巷道横截面空间点位距离参数
Table 1. Spatial point distance parameter of roadway cross section
m 巷道 L1 L2 H1 H2 H3 副一大巷 2.2 2.2 1 2 3 副二大巷 2.4 2.4 1 2 3 辅运大巷 2.8 2.8 1 2 3 
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表 2 10 m电缆损耗实测结果
Table 2. Measured loss results of 10 m cable
中心频率/GHz 4.0 4.5 5.5 6.0 损耗/dB 9.0 9.6 10.8 11.4
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[1] 孙继平,陈晖升. 智慧矿山与5G和WiFi6[J]. 工矿自动化,2019,45(10):1-4.SUN Jiping,CHEN Huisheng. Smart mine with 5G and WiFi6[J]. Industry and Mine Automation,2019,45(10):1-4. [2] 胡青松,张申,吴立新,等. 矿井动目标定位:挑战、现状与趋势[J]. 煤炭学报,2016,41(5):1059-1068.HU Qingsong,ZHANG Shen,WU Lixin,et al. Localization techniques of mobile objects in coal mines:challenges,solutions and trends[J]. Journal of China Coal Society,2016,41(5):1059-1068. [3] 孙继平,江嬴. 矿井车辆无人驾驶关键技术研究[J]. 工矿自动化,2022,48(5):1-5,31.SUN Jiping,JIANG Ying. Research on key technologies of mine unmanned vehicle[J]. Journal of Mine Automation,2022,48(5):1-5,31. [4] 符世琛,李一鸣,张敏骏,等. 基于UWB信号的TW−TOF测距技术在狭长巷道中的精度测试实验研究[J]. 煤炭技术,2017,36(3):246-248.FU Shichen,LI Yiming,ZHANG Minjun,et al. Accuracy testing experiment in narrow roadway based on TW-TOF ranging technique of UWB signals[J]. Coal Technology,2017,36(3):246-248. [5] 郝维来,杨公训. 基于UWB无线通信技术在矿井中的应用研究[J]. 计算机应用研究,2008,25(2):600-602.HAO Weilai,YANG Gongxun. Application of wireless communication technology based on UWB in coal mine underground[J]. Application Research of Computers,2008,25(2):600-602. [6] 刘清. 基于超宽带技术的采煤机定位系统设计[J]. 煤炭科学技术,2016,44(11):132-135.LIU Qing. Design on positioning system of shearer based on ultra wide band technology[J]. Coal Science and Technology,2016,44(11):132-135. [7] 孙继平. 煤矿智能化与矿用5G[J]. 工矿自动化,2020,46(8):1-7.SUN Jiping. Coal mine intelligence and mine-used 5G[J]. Industry and Mine Automation,2020,46(8):1-7. [8] 孙继平,张高敏. 矿用5G频段选择及天线优化设置研究[J]. 工矿自动化,2020,46(5):1-7.SUN Jiping,ZHANG Gaomi. Research on 5G frequency band selection and antenna optimization setting in coal mine[J]. Industry and Mine Automation,2020,46(5):1-7. [9] 顾义东,孟玮. 煤矿5G无线通信系统建设构想[J]. 工矿自动化,2021,47(10):1-6,13.GU Yidong,MENG Wei. Coal mine 5G wireless communication system construction concept[J]. Industry and Mine Automation,2021,47(10):1-6,13. [10] 孙继平. 煤矿智能化与矿用5G和网络硬切片技术[J]. 工矿自动化,2021,47(8):1-6.SUN Jiping. Coal mine intelligence,mine 5G and network hard slicing technology[J]. Industry and Mine Automation,2021,47(8):1-6. [11] 霍振龙. 矿井无线通信系统现状与发展趋势[J]. 工矿自动化,2022,48(6):1-5.HUO Zhenlong. Current situation and development trend of mine wireless communication system[J]. Journal of Mine Automation,2022,48(6):1-5. [12] 高思伟,李森. WiFi快速漫游与Mesh网络技术在综采工作面的应用研究[J]. 工矿自动化,2019,45(2):35-40.GAO Siwei,LI Sen. Research on application of fast roaming and Mesh network technology of WiFi communication on fully mechanized coal mining face[J]. Industry and Mine Automation,2019,45(2):35-40. [13] 孙继平,程加敏. 煤矿智能化信息综合承载网[J]. 工矿自动化,2022,48(3):1-4,90.SUN Jiping,CHENG Jiamin. Coal mine intelligent information comprehensive carrier network[J]. Journal of Mine Automation,2022,48(3):1-4,90. [14] 孙继平. 矿井宽带无线传输技术研究[J]. 工矿自动化,2013,39(2):1-5.SUN Jiping. Research of mine wireless broadband transmission technology[J]. Industry and Mine Automation,2013,39(2):1-5. [15] 孙继平. 矿井移动通信的现状及关键科学技术问题[J]. 工矿自动化,2009,35(7):110-114.SUN Jiping. Present situation and key problems of science and technology of mine mobile communication[J]. Industry and Mine Automation,2009,35(7):110-114. [16] 关丙火,张晋. 煤矿井下“一网一站”组网模式关键技术研究[J]. 煤炭科学技术,2019,47(10):155-160.GUAN Binghuo,ZHANG Jin. Study on key technology for networking mode of "one net and one station" in coal mine[J]. Coal Science and Technology,2019,47(10):155-160. [17] 原志明. 智能矿井“一网一站”通信技术集成与应用研究[J]. 能源与环保,2017,39(9):104-109.YUAN Zhiming. Combination of "one net one station" communication technology of intelligent mine shaft and its application[J]. China Energy and Environmental Protection,2017,39(9):104-109. [18] 丁序海,潘涛,彭铭,等. 煤矿井下无线电波对人体的影响[J]. 工矿自动化,2022,48(11):84-92,144.DING Xuhai,PAN Tao,PENG Ming,et al. Influence of underground radio wave on human body in coal mine[J]. Journal of Mine Automation,2022,48(11):84-92,144. [19] 王艳芬,陈颖,孙彦景. 矿井UWB路径损耗模型的构建及仿真[J]. 太原理工大学学报,2012,43(5):549-552.WANG Yanfen,CHEN Ying,SUN Yanjing. Construction and simulation of the path loss model for mine UWB[J]. Journal of Taiyuan University of Technology,2012,43(5):549-552. [20] NKAKANOU B,DELISLE G Y,HAKEM N. Experimental characterization of ultra-wideband channel parameter measurements in an underground mine[J]. Journal of Computer Networks and Communications,2011(1):1-7. [21] COULIBALY Y, GILLES D, NADIR H, et al. Experimental characterization of the UWB channel for an underground mining vehicle[C]. 7th European Conference on Antennas and Propagation, Gothenburg, 2013: 2331-2334. -
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