工矿自动化2025，Vol.51Issue(2)：41-47,56,8.DOI:10.13272/j.issn.1671-251x.2024110082
矿井巷道无线传输超表面反射测试分析
Analysis of metasurface reflection tests for wireless transmission in mine roadways
摘要
Abstract
High-frequency wireless electromagnetic waves suffer significant transmission loss in curved roadways and at roadway corners,resulting in signal blind spots.To address this issue,a metasurface reflection technique was proposed to enhance wireless signal coverage and mitigate signal blind spots.The traditional cross-shaped structure of the metasurface array unit was improved,and a 330° phase shift range and a well-defined linear phase shift curve were achieved by embedding multi-level nested rectangular resonators and adjusting the internal cross dimensions.Based on this,a metasurface reflection device was designed and fabricated.Using the 5.8 GHz ultra-high frequency band,simulations and field tests were conducted to evaluate the signal enhancement performance of the metasurface reflection device in the inclined curved section and the intersection of main and auxiliary sections in the Qingshuixi roadway.The results showed that,with fixed transmission and reception distances and different transmission antenna structures,the installation of the metasurface reflection device enhanced both the signal-to-noise ratio and the reference signal receiving power to varying degrees in both the inclined curved section of roadways and the intersection of main and auxiliary sections.The enhancement was most significant when using a linearly polarized horn directional antenna,with a maximum gain of 13 dB in received reference signal power.The analysis highlighted challenges in applying passive metasurface reflection technology in mine roadways,including difficulties in aligning the incident wave angle,focusing the beam,and achieving sufficient wave incidence distance.Based on the test results,fixed installation of metasurface reflection devices at roadway intersections is recommended for point-to-point transmission blind spot mitigation.关键词
矿井无线传输/巷道信号覆盖补盲/无线信号增强/超表面反射/超表面阵列设计Key words
mine wireless transmission/roadway signal coverage enhancement and blind spot mitigation/wireless signal enhancement/metasurface reflection/metasurface array design分类
矿山工程引用本文复制引用
李昀,罗伟,尹波,李小亮..矿井巷道无线传输超表面反射测试分析[J].工矿自动化,2025,51(2):41-47,56,8.基金项目
国家重点研发计划项目(2022YFB4703603) （2022YFB4703603）
煤矿灾害防控全国重点实验室2022年开放基金项目(2022SKLKF12). （2022SKLKF12）
