煤矿井下物联网UHF射频识别标签天线设计

内容简介：针对物联网在煤矿中的应用,设计一种用于煤矿井下射频识别的被动式标签天线,该天线采用平面曲折线偶极子结构,天线的设计和分析是在以山西关底煤矿井下工作面参数为依据所构建的井下巷道模型中进行的,鉴于巷道模型的侧壁可等效为电磁波的吸收边界条件,设计采用时域有限积分技术。试验结果表明：当射频标签从井上进入井下,并置于中间位置时,巷道对天线频偏的影响较小;当标签从中间位置移到侧壁时,巷道对天线频偏的影响较大。据此,分别给出识别模式为阅读器固定、标签在巷道中间平移,以及识别模式为阅读器平移、标签固定于巷道侧壁时,标签天线的最佳结构和最优性能。

Abstract：According to the application of the interact of things in coal mines, a passive type tag antenna applied to the radio frequency identification in underground mine was designed. A plane meanderline dipole structure was applied to the antenna. The design and analy-sis of the antenna was conducted in the underground mine roadway model established with the data of the underground coal mining face pa-rameters in Shanxi Guandi Mine. Based on the absorption boundary condition of the equivalent electromagnetic wave in the sidewall of the roadway model, the time domain finite integration technology was applied to the design. The results showed that when the tag was in the underground mine from the mine surface and was in the middle position of the mine roadway, the mine roadway would have a low influence to the frequency difference of the antenna. When the tag was moved from the middle position to the sidewall, the mine roadway would have a high influence to the frequency difference of the antenna. Therefore, the identification mode individually provided was the reader fixed and the tag horizontally shifted in the middle of the mine roadway. When the identification mode was the reader with horizontal shift and the tag wad fixed at the sidewall of the mine roadway, the tag would have the optimized structure and the best performances.

作者：刘健, 李国民,

关键词：物联网, 射频识别标签, 曲折线对称阵子, 反射系数, 方向图,