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| Study on Antenna Key Metrological Technical Parameters for Across- the-road Vehicle Radar Speed-measuring Device |
| DU Lei, SUN Qiao, CAI Chang-qing, ZHANG Yue, HU Hong-bo |
| National Institute of Metrology, Beijing 100013, China |
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Abstract The principle of across-the-road vehicle radar speed-measuring device is presented. The cause for the speed-measuring error in actual traffic is analyzed, and then the antenna key metrological technical parameters, the mainlobe beamwidth in the horizontal plane shall not exceed 6°, which should be satisfied to meet actual speed-measuring error limit, are studied. It has been proved by the test results of two types of across-the-road radar in actual traffic. During the measurement, if the mainlobe beamwidth in the horizontal plane does not exceed 6°, the measuring results are more accurate and reliable. Therefore, it can meet the technical requirements laid down in the relevant national verification regulation and technical standards.
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2013, Vol. 34 
