【摘要】 首先给出了动态称重系统设计组成,该系统以单片机AT89C51为核心,配以电荷放大器、A/D转换单元,然后用主机进行软件处理,重点介绍了其中的电荷放大器。并用该系统完成了一次路面试验,试验结果表明,信号采集系统合理可行,压电薄膜轴铺设在路面时,性能没有预先想象的优良,最后分析了原因并给出了改进措施和方法。更多还原

【Abstract】 This article firstly introduced constitutes of the Weight In Motion system which took AT89C51 microcomputer as its core coupled by an A/D convert circuit and a charge amplifier with an emphasis on the latter.Then the signal entered the host computer and was worked by the software part.A road experiment involving the concerning system showed that the system works well while the performance of Piezoelectric Axle was not as excellent as expected when it was laid on the surface of the road,the problems were analyzed and improvements were suggested in the final.更多还原