发布时间 : 星期四 文章基于51单片机的流水线产品计数器设计_毕业设计更新完毕开始阅读81839fa0fbb069dc5022aaea998fcc22bdd14316
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毕业设计（论文）
基于51单片机的流水线
产品计数器设计
班 级: 31001班 姓 名: 唐树春 专 业: 应用电子技术 指导老师: 周晓红老师
二零一二年六月十日
摘 要
本系统采用的是以单片机STC89c52为核心的光电计数器。其工作原理是采用单片机的外部中断0来进行计数，数据采集部分采用反射式光电传感器，将红外发光管与光电接收管相邻安放，每当物体通过一次，红外光就被物体反射，光电接收管接收一次，光电接收管的输出电压就产生一个变化，这个变化的电压信号通过放大和处理后，形成计数脉冲，输入至STC89c52单片机的P3.2口，通过软件控制和硬
I 件控制并用LED加以显示，便可实现对物体的计数统计。本计数器可将机械或人工计数方式变为电子计数，并且采用LED数码管显示，可适用于诸多行业，以满足现代生产、生活方式的需求。
所谓的光电式传感器是将光信号转化为电信号的一种传感器。光电式传感器是以光电器件作为转换组件的传感器，光电检测方法具有精度高、应用快、非接触等优点，而可测参数多，光电传感器的结构简单，形式灵活多变因此，光电式传感器在检测和控制中应用非常广泛。
关键词：计数器；光电传感器；单片机；LED数码管
Abstract
This system USES is with STC89c52 single chip microcomputer as the core of the photoelectric counter. The working principle of adopting SCM external interruption 0 to count, the data acquisition of the reflecting photoelectric sensor, the infrared light tube and photoelectric receiving tube adjacent put, whenever the object through a, infrared light is object reflective, photoelectric tube receiving a receiving, photoelectric receiving tube is the output voltage of produce a change, the changes of the voltage signal through the amplifier and processing, form count pulse, the input to STC89c52 SCM P3.2 mouth, through the control software and realize the object counting statistics. This counter can or mechanical artificial count way into
electronic counted, and using LED digital display tube, can be used in many industries, to meet the modern production, the way of life of demand.
The so-called photoelectric sensor is light signals are converted to electrical signals a sensor. Photoelectric sensor is based on photoelectric device as a conversion of components of the sensor, photoelectric detection method , the advantages of fast contact, and can be measured parameters, the structure of the photoelectric sensor is simple, flexible in form so, photoelectric sensor in the detection and control is widely used.
Keywords: counter; Photoelectric sensor; microcomputer; LED digital tube
目 录
摘 要 ............................................................................................................................... I ABSTRACT ............................................................................................................................ III 第1章 绪 论 ............................................................................................................... 1
1.1、本论文的背景和意义 .......................................................................................... 1 1.2、主要方法和研究进展 .......................................................................................... 1 1.3、主要内容 .............................................................................................................. 1 1.4、结构安排 .............................................................................................................. 1 第2章 整体设计方案 ......................................................................................................... 2
2.1、设计方案选择 ...................................................................................................... 2 2.2、设计方框图 .......................................................................................................... 2 第3章 硬件设计及功能 ................................................................................................. 2
3.1、基本介绍 .............................................................................................................. 3 3.2、AT89C52引脚功能 ............................................................................................... 3 3.3、STC89C52系统结构图 .......................................................................................... 4 3.4、STC89C52的复位与时钟 ...................................................................................... 5 3.5、STC89C52单片机的基本工作电路 ..................................................................... 5 3.6、本次设计的部分电路 .......................................................................................... 5 3.7、74HC573芯片 ....................................................................................................... 5 3.8、显示电路 .............................................................................................................. 6 第4章 软件设计 ............................................................................................................... 7
4.1、PROTEUS软件 ..................................................................................................... 7 4.2、KEIL C51软件 .................................................................................................... 8 4.3、软件设计流程图： ............................................................................................ 11 致 谢 ............................................................................................................................. 12 结 论 ........................................................................................................................... 12 参考文献 ............................................................................................................................. 13 附 录 1 电气原理图 ................................................................................................. 14 附 录 2 PCB图与3D视图 ............................................................................................ 14 附录3 源程序 .................................................................................................................. 17 附录4 仿真效果图 ............................................................................................................ 18