带驱蚊功能的电子广告显示屏设计最终

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1、湖南师范大学毕业设计论文题目：带驱蚊功能的电子广告显示屏设计考籍号：910805301843姓名：李井锋专业：电子工程指导教师：刘习春通讯地址：物理与信息科学学院电话：07316680646-21-目录摘要·······························································（3）1总体结构设计·····················································（4）2单片机外围硬件设计··············

2、·································（4）2.1AT89S52简介·················································（4）2.2电源电路设计·················································（5）2.3单片机复位及时钟电路·········································（6）2.4电源监控电路·····························

3、····················（7）2.5点距阵显示电路···············································（8）2.674LS154译码电路·············································（9）-21-3单片机串行通信··················································（10）3.1单片机串行接口···································

4、···········（10）3.2串行接口工作原理············································（10）3.3帧格式······················································（10）3.4通信波特率··················································（11）3.5电平转换·················································

5、···（11）4系统软件设计····················································（12）5超声波发生原理··················································（14）6超声波功率放大··················································（15）7软硬件调试-21-····················································

6、··（16）8电路原理图······················································（17）9结束语··························································（18）摘要LED电子广告显示屏主要用于显示各种宣传信息，它信息含量大，可显示文字、图表、动画、图像等。它采用低电压扫描驱动，具有耗电省、使用寿命长、成本低、亮度高、视角大、可视距离远等特点。近年来LED广告显示屏在银行、邮电、税务、机场、车站、港

7、口、证券市场及医院、海关、体育场、公交车内等需要进行公告、宣传的场合得到了广泛的应用，目前LED电子广告显示屏作为信息传播的一种重要手段，已经成为城市信息现代化的标志。本设计以MCS-51单片机为核心，为电子广告显示提供廉价解决方案。另外，本设计巧妙地与仿生学相结合，由单片机定时产生的超声波可对蚊虫进行驱扰，在夏天这对公共场所的卫生将有很大的改善，并且绿色、环保、无污染。关键字：单片机，LED点阵，串口通信，超声波-21-带驱蚊功能的电子广告显示屏设计1总体结构设计本设计应用AT89S52单片机对高亮度LE

8、D点距阵显示屏进行控制，显示的汉字通过RS232串行接口从计算机输入。操作人员可以在计算机上使用文字输入程序通过计算机的COM口向控制系统输入需要显示的文字，即可在LED显示屏上显示相应的文本。并由单片机定时产生超声波对蚊虫进行驱扰。总体框图如图1。-21-89S52单片机电脑功率放大（超声波）LED点矩阵RS232串口通信驱动文字输入程序图1系统总体框图2单片机外围硬件设计2.1AT89S52简介AT89S52