摘要
多普勒雷达测速仪是对机动车行驶速度进行测量的仪器,通常按大于5°的固定角度安装(或放置)于车道上方或道路旁的固定设施。其天线波束方向和地面的实际夹角与理想值之间存在一定偏差,且固定设施因长时间路面震动或道路环境变化,天线波束方向和地面的实际夹角会缓慢改变,进而造成机动车速度测量的误差加大。因而,多普勒雷达测速仪方向图检测的重要作用不言而喻。本文对K波段多普勒机动车雷达测速仪方向图检测的不确定度进行评定,建立水平主瓣宽度、副瓣电平测量不确定度评定模型,分析检测过程中测量重复性、雷达方向图测量系统设备引入的误差,为现行定角式雷达测速仪型式评价工作提供了有效指导。
The Doppler radar speed measuring instrument is a measuring instrument for the driving speed of the motor vehicle.Usually,it is installed(or placed)at a fixed angle greater than 5°on a fixed facility above the road or by the road.There is a certain deviation between its antenna beam direction and the actual angle of the ground and the ideal value.With the long-term road vibration or the changes in the road environment for the fixed facilities,the actual angle of the antenna beam and the ground will slowly change,which will cause the error of speed measurement increases for motor vehicles.Therefore,the important role of the Doppler radar speed measur-ing instrument in direction diagram testing is self-evident.This article aims at the uncertainty assessment of the direction diagram testing for the Doppler motor radar speed measuring instrument working in the K-band,and establishes uncertainty evaluation model of the hori-zontal main lobe beam width and side lobe level measurement then analyzes the error comes from the repeatability during the detection process and the radar direction diagram test system equipment,which provides an effective guidance for the type evaluation of current fixed-angle radar velocimeter.
作者
魏小龙
史倩倩
徐玉帅
余昭
WEI Xiaolong;SHI Qianqian;XU Yushuai;YU Zhao(Anhui Provincial Institute of Metrology Science,Hefei 230051,China)
出处
《电子测试》
2023年第4期77-79,共3页
Electronic Test
基金
安徽省重点研究与开发计划(202104g01020005)项目资助。
关键词
多普勒雷达测速仪
水平主瓣宽度
副瓣电平
测量不确定度
Doppler radar speed measuring instrument
horizontal main lobe beam width
side lobe level
easurement uncertainty
