毕业设计论文直流数字电压表的设计与实现.doc

毕业设计论文-直流数字电压表的设计与实现 毕业设计论文题 目 直流数字电压表的设计与实现 专 业 电子信息工程 班 级 电信0901 学 生 指导教师 高科学院 72013 年摘 要在日常维修教学和科研中电压表是不可缺少的本课题目的就是以单片机为基础设计出一种结构简单工作可靠灵活性好的数字电压表本文首先介绍了数字电压表的发展现状及课题的目的和意义然后对基于单片机的数字电压表的硬件系统软件系统的设计原理及具体实现方案作以详细介绍其中在硬件部分较为详细的讨论了硬件的选择设计原理使用方法和功能同时对各部分接口电路作以介绍在软件部分介绍了软件所使用的编程语言和编程思路本文设计的数字电压表其硬件电路所用组件较少成本低调节简单软件采用C语言编程其灵活性高可读性强该设计主要由三个模块组成AD转换模块数据处理模块及显示模块AD转换主要由芯片ADC0809来完成它负责把采集到的模拟量转换为相应的数字量在传送到数据处理模块数据处理则由芯片AT89C51来完成其负责把ADC0809传送来的数字经过一定的数据处理产生相应的显示码送到显示模块进行显示此外它还控制着ADC0809芯片工作经过理论研究原理设计和整机调试实验结果表明该方案可行本次设计的电压表所测量的直流电压范围为0～4v要求测量电压的误差不超过01v它以单片机AT89C51为核心主要由转换电路将输入的模拟量转换为数字量的AD转换器AD晶显示器构成关键词单片机电压表AD转换器1602液晶显示器ABSTRACTIn routine maintenance teaching and research voltage meter is indispensable A direct current digital voltage meter has been designed which is based on MCU and has a simple structure reliable flexibleFirstlythis paper introduced the development of the base on MCU digital voltage meter and the purpose and significance of topic Then in details this paper described the design principle of hardware and software systems And in details the hardware part present a discussion in hardware selection design principles instructions and the function further more some of the interface circuit have been introduced The software part introduced the programming language and programming ideas used in codesThe digital voltage meter designed here have less components in the hardware part lower cost and easier testing software used C programming language which is high flexibility and strong readability The circuit of the voltage meter is mainly consisted of three mould pieces AD converting mould piece AD converting is mainly completed by the ADC0809 it converts the collected analog data into the digital data and transmits the outcome to the manifestation controlling mould piece Data processing is mainly completed by the AT89C51