本文简述了目前动态称重采用的几种方法的优缺点,详细分析了汽车动态称重信号的频谱特性,提出速度对低通数字滤波的截止频率参数选择的影响。并在此基础上,使用二分梯形法改进以前的平均方法,使得开始与结束点便于选取,实际测量结果证明了方法的有效性。 关键字:动态称重二分梯形法 低通数字滤波 Abstract: The advantages and limitations of some methods of weigh-in-motion are illustrated in this article. The signal of vehicle weigh-in-motion is analyzed entirely and the effect of velocity on the cut-off frequency of low-pass digital filter is presented. On this condition, new method of dicho- trapezoid method is presented to ameliorate the average method before. The results of actual experiments prove the availability of this method. Keywords: weigh-in-motion dicho- trapezoid method low-pass digital filter