基于双雷达的轨道交通测速方法及误差分析  

A Rail Transit Speed Measurement Method Based on Dual-radar and Its Error Analysis

作　　者：周媛 周巧莲[1] 郑成鑫 张谦虓 ZHOU Yuan;ZHOU Qiaolian;ZHENG Chengxin;ZHANG Qianxiao(Shanghai Shentong Metro Group Ltd.,Shanghai 201103,China;Shanghai Radio Equipment Research Institute,Shanghai 201109,China)

机构地区：[1]上海申通地铁集团有限公司,上海201103 [2]上海无线电设备研究所,上海201109

出　　处：《控制与信息技术》2021年第1期30-34,共5页CONTROL AND INFORMATION TECHNOLOGY

摘　　要：雷达测速是目前轨道交通测速的主要技术手段之一,传统的单部雷达测速方法需要精确标定天线相位中心高度,这给工程实现带来了一定的困难。为此,文章提出了一种两部雷达联合测速方法,其根据两部雷达的多普勒频率和高度差信息,实时解算雷达绝对高度,进而估计列车速度,工程上更易于实现;此外,雷达测速相比激光测速环境适应性更强,且双雷达测速系统的成本不到进口激光测速产品的一半。为了指导系统参数设计,文章总结并分析了两部雷达测速的误差因素及其对测速精度的影响,并通过工程试验对本文设计的双雷达系统与进口激光测速产品进行比较,结果显示,两者测速精度相当。Radar is one of the most commonly used technical methods for measuring vehicle speed in rail transit.For traditional speed measurement method by single radar,accurately calibrating phase center height of antenna is necessary,which would introduce difficulties for project implementation to a greater or lesser extent.This paper introduces a dual-radar speed measurement method which could measure metro vehicle speed by calculating absolute height of radar in real-time based on both Doppler frequency and altitude difference information of dual-radar.The proposed method is easier to realize in practical engineering,more adaptable to environment than laser speed measurement method,and the cost of dual-radar system is less than half of the imported laser speed measurement device.Moreover,for system parameter optimization,this paper studies and analyses the influence factors of error of dual-radar method and the impact on precision of velocity measurement.Engineering test results show that the dual-radar speed measurement system has nearly the same test precision than that of the imported laser radar product.

关 键 词：轨道交通测速 分布式双雷达 多普勒频率 雷达测速 

分 类 号：U270.38[机械工程—车辆工程] TN975.51[交通运输工程—载运工具运用工程]