摘要
现有的汽车动态称重方法在低速下精度较高,而车速一旦增高则精度下降很快。本文从大量实验数据中提取出称重误差与车速及轴重测量值的规律,并且该规律与车型无关,以此作为先验知识来修正测量值,显著提高中等车速下的称重精度。将此方法应用于动态汽车衡的开发,安装路试表明,车速低于30km/h时最大相对误差为6%,达到了ASTM规定的Ⅲ类动态称重标准。
The weigh-in-motion （WIM） systems currently in use usually have relatively high precision at low speed and suffer rapid precision degradation when speed increases. Through analyzing large quantities of experimental data, this paper finds a rule between weighing error and speed as well as measured axle load, which is independent of vehicle types. Applying this rule as priori knowledge to correct the measurement data, weighing precision can be significantly improved in middle speed region. This method is implemented in the development of our new WIM system, and field test results show that the maximum relative error is 6% at the speed up to 30 km/h, which meets the requirement of ASTM III standard for WIM system.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2009年第2期380-384,共5页
Chinese Journal of Scientific Instrument
关键词
汽车动态称重
中等车速
称重精度
先验知识
weigh-in-motion
middle speed region
weighing precision
priori knowledge
