乳粉包装自动称重系统的设计.doc

乳粉包装自动称重系统的设计

目   录
1  引言 1
2  国内电子称重的现状 1
3  电子称重技术发展的趋势 2
3.1 称重传感器 2
3.2 称重仪表 2
3.3 承载器 3
4  乳粉包装称重的工艺流程 3
5  系统方案的设计 3
5.1 系统的硬件构成 3
5.1.1系统的技术要求和传感器选择 4
5.1.2测量放大器及求和器 5
5.1.3A/D转换芯片的选择 6
5.1.4存储器的扩展 7
5.1.5键盘及显示接口扩展 7
5.1.6输出接口扩展 9
5.1.7系统的电源电路介绍 9
5.2系统软件设置 11
5.2.1乳粉包装称重对象的数学模型分析 11
5.2.2系统补偿的原理和方案 12
5.2.3系统软件设计原则 12
5.2.4存储区分配及程序流程图 12
6  抗干扰技术及措施 15
6.1硬件抗干扰的设计 15
6.2电源的干扰以及抑制措施 16
6.3空间干扰的防御措施 16
7 结束语 16
8  致谢 16
参考文献： 16
ABSTRACT 17
 
乳粉包装称重系统的设计
摘要：论文分析了国内外称重技术发展的基础上，主要讨论了一个用于工业控制且功能较齐全的自动称重系统的开发。随着自动化和管理现代化的进展，自动在线称重,快速动态称重和称重系统中有了很大的发展，进一步采用新技术，开发各种自动称重系统,提高称重的准确度。
论文所介绍的自动称重系统是应用于工业上的乳粉包装自动称重中的，它的实现有两个过程，第一阶段由异步电机带动粗螺旋推进器给料，这一阶段可看成为粗调过程，给料重量一定要小于额定重量。第二阶段由步进电机带动细螺旋推进器进料，可看成是细调过程，使实际重量等于要求的额定重量。本系统应用了传感器，各种芯片及单片机。工业性能强，便于应用与工业上。
关键词:自动称重系统  粗调  细调

Abstract: This paper on the basis of weighing technology development at home and abroad, focuses on the development of automatic weighing systems for industrial control function is complete. With the progress of the automation and management modernization, the automatic weighing line, fast dynamic weighing and weighing system has been greatly developed, further adoption of new technologies, develop a variety of automatic weighing systems, improve the accuracy of weighing.
Paper introduces automatic weighing system is applied to the automatic weighing of the milk powder packaging industry, it is the realization of the two processes, the first phase induction motor driven coarse screw propeller feed at this stage to be seen coarse adjustment process, the weight of the feed must be less than the rated weight. The second stage of fine spiral driven by a stepping motor propulsion feed can be regarded as fine-tune the process, the actual weight is equal to the required weight rating. The system application sensors, a variety of chips and microcontroller. Industrial performance, ease of application and industry.
Keywords: automatic weighing system coarse fine-tune