摘要
为了指导ETC车道路侧单元(RSU)天线的安装和调试,提出基于改进质心法的ETC车道场强分布中心定位算法,计算ETC车道RSU天线无线信号场强分布中心位置,与ETC车道交易区中心做对比,可以量化RSU的调整建议,最大程度让高强度信号分布在交易区域内,提高ETC的效能。通过比较分析场强质心法、能量质心法、距离加权质心法以及指定范围质心法的计算结果和误差分析,发现距离加权质心法误差最小,误差为4.078%,更加适用于ETC车道场强分布中心定位计算场景。研究成果在山西省应用,用数理统计的方法分析出山西省高速道路ETC车道横向场强中心的分布范围为[-0.4,0.3]m,纵向场强中心的分布范围为[3.93,6.65]m,可用于指导该地区RSU天线的安装和调试工作。同时,发现该地区ETC车道存在水平场强中心偏左的问题,给出有针对性的调整建议。
In order to scientifically guide the installation and commissioning of the road side unit(RSU)in ETC lane,this paper proposes a location algorithm of field intensity distribution center of ETC lane based on improved centroid algorithm.By calculating the position of the wireless signal field intensity distribution center of the RSU in ETC lane and comparing it with the center of the trading area of ETC lane,the adjustment suggestions of RSU can be quantified,the distribution of high-intensity signals in the trading area is maximized,and the efficiency of ETC is improved.The calculation results and error analysis of field intensity centroid algorithm,energy centroid algorithm,distance weighted centroid algorithm and specified range centroid algorithm are compared.It is found that the error of distance weighted centroid algorithm is the least,the error is 4.078%,so distance weighted centroid algorithm is more suitable for ETC lane field intensity distribution center location calculation scenario.The research results have been applied in Shanxi Province,and the distribution range of the transverse field intensity center and the longitudinal field intensity center of the expressway ETC lane in Shanxi Province are-0.4 m to 0.3 m and 3.93 m to 6.65 m,respectively,by mathematical statistics,which can be used to guide the installation and commissioning of RSU antennas.At the same time,it is found that the center of horizontal field intensity of ETC lane is left in this area,and the corresponding adjustment suggestions are given.
作者
岳鹏程
YUE Pengcheng(Shanxi Intelligent Transportation Research Institute Co.,Ltd.,Taiyuan 030006,China;Intelligent Transportation Laboratory of Shanxi Province,Taiyuan 030006,China)
出处
《微型电脑应用》
2024年第11期32-34,47,共4页
Microcomputer Applications
基金
山西省基础研究计划资助项目“运营工况下ETC系统交易性能检测关键技术研究”(202403021212178)
山西交通科学研究院集团有限公司创新发展计划项目(22-JKCF-20)。
关键词
质心法
ETC车道
场强分布中心
纵向场强中心
横向场强中心
centroid algorithm
ETC lane
field intensity distribution center
longitudinal field intensity center
transverse field intensity center
