摘要
为了将电磁能量收集技术应用到煤矿井下,采用实验测量和统计分析的方法对电磁能量收集的功率传输特性进行了研究,建立了微波在巷道中路径损耗的一般表达式;提出了一种用于井下巷道的功率传输模型,有效解决矩形、拱形巷道内近距离电磁能量传输效率的计算问题。仿真和实验分析证明了该模型的正确性,同时表明,功率衰减受路径衰减指数的影响较大,提升发射功率不是提升充电效果的最佳选择,在实际应用中,为了获得最佳接收功率,应根据接收机所处位置合理选取天线极化方式。
In order to apply electromagnetic energy harvesting technology in mine tunnels, the power transfer characteristics of electromagnetic energy harvesting were studied using experimental measurement and statistical analysis method. The expression of microwave path loss in tunnel was established, thus the power transfer model of energy harvesting used in mine tunnels was deduced, which is able to calculate power transfer efficiency in both arched and rectangular tunnels in short distance. Simulation and experimental analysis shows correctness of the model, and shows that the power attenuation is affected by the path loss exponent, and improving transmitted power continually is not the optimal choice to promote the charging efficiency, in practical application, different locations should adopt reasonable antenna polarizations to gain the maximal power.
出处
《工矿自动化》
北大核心
2016年第5期56-63,共8页
Journal Of Mine Automation
基金
中国矿业大学大学生创新训练计划项目(X1029015058)
关键词
电磁能量收集
功率传输模型
路径衰减
electromagnetic energy harvesting
power transfer model
path loss
