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论文编号:ZD1281 论文字数:21381,页数:43 附原理图,外文翻译
摘 要
随着社会经济文化的发展,印刷品已成为人们日常生活的必需品。它在文化传播,新闻报道,以及产品宣传等都起到了不可替代的作用。因此提高印刷品的质量具有重要的现实意义。纸张作为印刷品的主要原材料,它的性能如何直接决定了印刷品的质量。平滑度是评价纸张表面凹凸程度的重要技术指标,是表示纸张表面平整、光滑和均匀程度的物理量,纸张平滑度越好,印刷时纸面与印版间的接触也就越均匀和完整,版面(凸版)或橡皮布上的墨层转移也越充分,印刷品呈色效果也越好。因此如何评价纸张的平滑度在工程上就具有了重要的现实意义。
本文研制的智能型纸张平滑度测试仪是根据别克法设计的,它将计算机和仪器有机的结合在一起。该测试仪以89C51单片机为核心并外接压力传感装置和其它芯片的计算机系统。它包括多个功能模块电路,但它们都是在89C51单片机控制下进行工作的。各功能模块主要与CPU进行联系,其相互间联系相对较少,这样就降低了系统的复杂程度,同时也提高了工作效率。
为了适应现代生产及测试的要求,本论文研制的纸张平滑度测试仪的主要特点是:相对传统的模拟测试仪器更加准确,快速,体积更小,便于操作和维护,因此它能更好的完成纸张平滑度测试的工作。
关键词: 别克法 纸张平滑度 压力传感器 单片机89C51 单相交流电机
Abstract
With the development of the economy and culture, the presswork had been the necessity to the people .it can not be substituted in civilization- spread, news-reported, advertisement of product and so on. so it is important to improve the quality of the presswork .as the main materials of presswork, the capability of the paper determine the quality of the paper directly the smoothness degree of the paper is a very important factor to judge the concave and protrude of the paper .and it is also a physical factor show smooth, velvet and uniformity of the paper surface .the more smooth the paper is ,the more smooth and the integrity when the paper and the forme touch., and the printing ink will displace more fill in the forme or the mackintosh and the presswork will also be better .so how to evaluate the smooth of the paper has been very important .
The paper smooth analyzer is a production of organic combination of micro-computer and instrument by bekk .this analyzer is in core of AT89C51 and meet other chips and pressure sensor. it includes more function modules, which work under control of AT89C51 single chip machine .each module mainly make contact with CPU in order to reduce the complexity of the system .the analyzer adopts module construction to expand function.
This paper smooth analyzer suits the demand of modern production and test .Compared to the tradition analogy analyzer its main characteristic is more exactness, more swift, more light, convenient to operate and vindicate. so it will achieve the work of product and test better.
Key words: bekk smooth of paper pressure sensor AT89C51
single-phase AC electromotor
目录
1 绪论…………………………………………………………………………… 4
2方案论证……………………………………………………………………… 5
3测试仪的整体设计…………………………………………………………… 6
4测试仪硬件电路的设计……………………………………………………… 8
4.1传感器的选择和设计………………………………………………………8
4.2信号的放大及滤波…………………………………………………………9
4.2.1信号的放大……………………………………………………………9
4.2.2信号的滤波…………………………………………………………10
4.3单片机接口的设计……………………………………………………………12
4.3.1 A/D转换器的设计………………………………………………………12
4.3.2显示器及驱动装置的设计………………………………………………13
4.3.3程序存储器的设计………………………………………………………15
4.3.4键盘的设计………………………………………………………………16
4.4单片机及其外围电路的设计…………………………………………………17
4.4.1单片机的选择……………………………………………………………17
4.4.2电源的设计………………………………………………………………18
4.4.3控制功率放大电路的设计………………………………………………18
4.4.3.1过零检测电路………………………………………………………18
4.4.3.2过零触发电路………………………………………………………19
4.4.3.3电磁阀及其驱动……………………………………………………20
5测试仪控制算法及应用软件的设计……………………………………………21
5.1控制算法的设计……………………………………………………………21
5.2应用软件的设计……………………………………………………………31
5.2.1数据采集程序的设计……………………………………………………31
5.2.2计时显示程序的设计……………………………………………………35
5.2.3键盘查询程序的设计……………………………………………………40
致谢…………………………………………………………………………………41
参考文献……………………………………………………………………………42
附录…………………………………………………………………………………43