粘性块状食品动态定量称重系统设计

作者：刘立业，李青 日期：2008-08-18/span> 浏览：4159 查看PDF文档

粘性块状食品动态定量称重系统设计

刘立业，李青
（中国计量学院 机电工程学院，浙江 杭州 310018）

摘要：针对解决粘性块状食品在动态定量称重中遇到的粘结问题，以及在称重中速度与精度的矛盾问题，采取了改进机械结构、电路系统优化设计、软件分阶段称重等方法来提高称重精度。机械结构使用双管螺旋喂料机加搅拌机构，特殊的称斗结构；硬件电路采用数字可编程放大器AD8555作为称重传感器微弱电信号的放大器，以便于补偿桥式传感器的失调和增益误差，同时采用32位单片微处理器LPC2134作为整个电路的处理核心，及时处理称重信息，并向执行机构发送命令；软件根据称重值采取分阶段喂料，并加入了FIR软件滤波，滤除了粗大误差信号，提高了称重精度。
关键词：称重传感器;机械结构;软件滤波; 控制器
中图分类号：TP216+.1文献标识码：A文章编号：1001-4551(2008)08-0062-04

Design of viscous food dynamic quantitative weighing system
LIU Li-ye, LI Qing
(College of Mechanical & Electrical Engineering, China Jiliang University, Hangzhou 310018, China)
Abstract: Aiming at solving the bond issue of viscous grocery and the contradictions of speed and accuracy in the quantitative dynamic weighing, the structure of the machine was improved, circuit system was designed, phased weighing method was adopted to improve weighing accuracy.The structural of mechanism adopted double pipes feed-in with mixing machine, special weighbridge for reducing bond; The hardware circuit make use of the programmable amplifier AD8555 which amplify the weak sensor signal and bridge imbalance compensation and gain error, at the same time,32-bit microprocessor LPC2134 was used as the core of the hardware to deal with the messages and send order to the implement machine. Software design transmits materiel by stages and FIR filter was adopted to remove big errors and enhance precision.
Key words: weighting sensor; mechanical structure; software filtering; controller
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