毕业设计 南京信息工程光电计数器课程论文报告.doc

滨江学院 课程报告 题 目 反射式光电计数器设计 院 系 滨江学院 专 业 电子科学与技术 学生姓名 *** 学 号 指导教师 常建华 职 称 副教授 二0一三 年 十一 月 二十一日 目录 绪论 1.1 光电计数器原理·······································1 1.2 国内外研究现状·······································2 1.3 本文主要研究内容·····································2 第二章 光电计数器设计方案论证 2.1 遮光式光电计数器·····································3 2.2 反射式光电计数器·····································3 2.3 方案选择·············································4 硬件电路设计 3.1 STC89C52简介·········································5 3.2 电源电路·············································7 3.3 传感器部分···········································8 3.3.1 E18-D50NK反射式红外传感器······················8 3.3.2 发射与接收电路··································9 3.4 复位电路·············································11 3.5 晶振电路·············································12 3.6 显示电路·············································12 3.6.1 线段的显示······································13 3.6.2 字符的显示······································13 3.6.3 汉字的显示······································13 3.6.4 1602字符型LCD简介····························· 13 3.6.5 1602LCD的基本参数及引脚功能·····················14 3.6.6 1602LCD主要技术参数 ····························14 3.6.7 1602LCD的指令说明及时序·························15 反射式光电计数器的软件设计 4.1 显示程序·············································17 第五章 系统调试···········································23 参考文献··················································23 致谢······················································24 附录······················································24 反射式光电计数器设计 *** 南京信息工程大学滨江学院电子科学与技术，南京 210044 摘要：本文基于STC89c52单片机设计了一个结构简单、性能稳定的工业流水线用反射式光电计数器,可实现产品流水线产品的实时计数功能。该系统采用型号为E18-D50NK的红外传感器为信号采集装置,将光信号转换成电信号。以电磁继电器、三极管构成放大电路，放大后的信号经单片机处理后显示在数码管上。当系统出现锁死情况时可以通过复位键调整，直至系统正常工作。该系统优点是硬件电路简单，控制系统可靠，具有很强的实用价值。该系统拓展后，可用于