基于真实交通状况的固定式机动车现场测速标准装置

摘要

To meet the requirement of new field testing method of vehicle speed measuring devices,a fixed standard instrument for field tests of vehicle speed measuring devices used in actual traffic is developed.The design idea and scheme of the standard instrument are introduced.The working principle of the standard speed meter used in the standard instrument is analyzed,and the speed measurement uncertainty of the standard speed meter is evaluated.The uncertainty evaluation results show that the relative expanded uncertainty is 0.12％ (k =3) in the speed measurement range of 20 ～250 km/h.The feasibility of new field testing method of vehicle speed measuring devices and the actual speed measuring performance of the standard instrument in actual traffic are verified by the large samples field testing data of 2 kinds of vehicle radar speed measuring devices.%为了满足机动车测速仪现场检测新方法的需要,研制了基于真实交通流量状态下的固定式机动车现场测速标准装置.介绍了该套现场标准装置的设计思路与设计方案,分析了现场标准装置中所用的现场标准测速仪的工作原理,并对其现场速度测量的不确定度进行评估.不确定度评估结果表明:在20～250 km/h速度测量范围内,现场标准测速仪的相对扩展不确定度为0.12％(k=3).通过2款机动车雷达测速仪样品的大样本现场试验数据,验证了机动车测速仪现场检测新方法的可行性,以及该套现场标准装置在真实交通流量状态下的实际测速性能.