【精品论文设计】基于单片机的红外线计数器设计.doc

温州大学瓯江学院 WENZHOU UNIVERSITY OUJIANG COLLEGE 本科毕业设计（论文） ( 2011届) 题 目： 基于单片机的红外计数器设计 专 业： 班 级： 姓 名： 学 号： 指导教师： 职 称： 完成日期： 摘 要 在当今社会飞速发展的格局下，越来越多的流水线上的产品和各种商业场合的人员需要进行自动计数.基于单片机构成的产品自动计数器有直观和计数精确的优点，目前已在各种行业中普遍使用本文所设计的计数器是采用红外方式，抗干扰性好，可靠性高本的指导思想是利用红外发光管发射红外线，红外接收管接收此红外线，并将其放大、整流形成高电平信号当有人或物挡住红外光时，接收管没有接收到红外信号，放大器将输出低电平，，并经译码驱动电路使数码管显示数值。这样就得到要统计的人或物的数量 Abstract Rapid development in the pattern of todays society, more and more of the pipeline of products and a variety of business occasions need to automatically count. Based on SCM products constitute automatic counter has the advantages of intuitive and accurate count, now in a variety of commonly used in industry. This article is designed to counter radio-style method using infrared, interference immunity and high reliability. The design of the guiding idea is to use infrared emission infrared LED, infrared receiver to receive the infrared, and enlarge, forming high commutation signal. When persons or block infrared light, the receiver does not receive infrared control signals, the amplifier the output low, while the level control signal into the microcontroller counts, and by decoding the digital display drive circuit values. This will be the number of persons or things to statistics.  The AT89C51 microcontroller chip design applications as a core, 4 LED digital tube, the use of infrared LM324 chip count, and add the alarm function. This implementation method has the advantage of simple circuit, reliable, real-time, simple operation, easy programming and so on.  Key words: SCM; infrared shooting tube; LM324; Buzzer ; LED digital tube 目 录 1 绪论 - 1 - 1.1 前言 - 1 - 1.2 背景与意义 - 1 - 1.2.1国内外研究的概况 - 1 - 1.2.2研究主要成果 - 2 - 1.2.3发展趋势 - 3 - 1.3 设计任务 - 3 - 2 红外线计数器总体设计方案 - 5 - 2.1 系统总体方案设计 - 5 - 2.2 主控芯片简介 - 7 - 2.2.1 单片机的发展及趋势 - 7 - 2.2.2 51系列单片机的主要特点