摘要数字电压表的诞生打破了传统电子测量仪器的模式和格局。它显示清晰直观、读数准确，采用了先进的数显技术，大大地减少了因人为因索所造成的测量误差事件。数字电压表是把连续的模拟量转换成不连续、离散的数字形式，并加以显示的仪表。数字电压表把电子技术、计算技术、自动化技术的成果与精密电测量技术密切的结合在一起，成为仪器、仪表领城中独立而完整的一个分支。数字电压表标志着电子仪器领城的一场革命。也开创了现代电子测量技术的先河。
本设计以单片机为开发平台，控制系统采用AT89C51单片机，A/D转换采用ADC0808,系统除能确保实现要求的功能外，还可以方便进行8路其它A/D转换量的测量、远程测量结果传送等扩展功能。简易数字电压测量电路由A/D转换、数据处理、显示控制等组成。8793
关键词 数字电压表 AT89C51 ADC0808 A/D转换
毕业设计说明书（论文）外文摘要
Title The design of the virtual digital voltmeter
Abstract
The birth of digital voltage meter to break the traditional mode of electronic measuring instruments and patterns. It shows the clear and intuitive. accurate reading,the use of advanced digital technology, greatly reducing the human factor due to measurement errors caused by the event. Digital voltmeter is the continuous analog (DC input voltage) into a non-continuous, discrete digital fort and displayed in the instrument. Digital voltage meter to electronic technology, computing technology.
automation technology and precision electrical measurement results of the close combination of technology, as equipment, instruments and complete the field of a branch of the independent, digital voltage meter marks a revolution in the field of electronic devices Also created a precedent for modern electronic measurement technology.
The design uses a single-chip platform for the development, control of the
Department of the use of AT89C51 single-chip, A/D conversion using ADC0808. In addition to the realization of the system to ensure that the required functionality, but also facilitate the 8 other A/D converter measurement, distance measurement function of transmission expansion. Simple digital voltage measuring circuit is made of the A/D conversion,data processing, display control. etc.
Keywords Digital voltage meter AT89C51 ADC0808 A/D conversion
目录
1 绪论 1
1.1 研究背景及意义 1
1.2 数字电压表的发展趋势 1
1.3 论文的主要内容及章节安排 2
2 系统的总设计方案 2
2.1 设计要求和设计思想 4
2.2 系统设计方案 4
3 硬件电路设计 4
3.1 系统主控电路 4
3.2 A/D转换电路 8
3.3 显示电路 13
3.4 前端采集总硬件电路图 16
3.5 MAX232 16
4 系统软件设计 17
4.1 仿真软件介绍 17
4.2 前端采集装置总流程图 18
4.3 软件编程 19
5 PC终端的软件设计 26
5.1 虚拟仪器技术 26
5.2 LabVIEW平台 29
5.3 基于LabVIEW的软件设计 30
6 系统的调试 33
6.1 前端采集装置设计的调试 33
6.2 PC终端软件设计的调试 35 AT89C51单片机虚拟数字电压表的设计:http://www.751com.cn/tongxin/lunwen_7253.html