汽车动态称重系统的信号处理研究  

Study on the Signal Processing for Weigh-in-motion System

作　　者：贾生尧[1] 厉志飞[2] 章越海 徐志玲[3] 李雄[1] 李青[1] 

机构地区：[1]中国计量学院机电工程学院,浙江杭州310034 [2]杭州市质量技术监督检测院,浙江杭州310019 [3]中国计量学院现代科技学院,浙江杭州310034

出　　处：《自动化仪表》2011年第10期5-8,12,共5页Process Automation Instrumentation

基　　金：杭州市社会发展科研攻关基金资助项目(编号:20070733B12)

摘　　要：相对于静态称重,汽车动态称重具有时间省、效率高等特点。现有的汽车动态称重系统在低速运行时(<10 km/h)的情况下,精度较高;而在中高速情况下,由于汽车受到沿路面垂直方向振动的影响,精度下降较快。通过对动态称重系统的阶跃响应曲线进行辨识,得到称重系统的传递函数。在比较称重系统的理想输出信号与实际测量信号之间差异的基础上,考虑汽车振动对测量造成的影响,总结得到汽车轴重信号波峰补偿算法。试验证明,该方法有效地提高了汽车动态称重的精度。Compared with the static weighing system,the dynamic weighing system,i.e.,weigh-in-motion（WIM） system features time saving and high efficiency.The accuracy of existing WIM system is high at the low speed（10km/h）,but at the high speed,the accuracy decreases rapidly due to the influence of vertical vibration of roadway.Through identifying the step response curves of WIM system,the transfer function of the weighing system has been obtained.By comparing the difference between the ideal output signal and the actual measurement signal of the system,and considering the influence of the vibration to the measurement,the compensation algorithm of peak signal of axle-weight is summarized and obtained.The experiment proves that the method efficiently improves the weighing accuracy of WIM.

关 键 词：数字信号 传感器 动态称重 数据采集 线性 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]