单片机设计数字电压表报告.doc

University of South China 单片机课程设计报告 设计课题： 基于单片机的数字电压表设计 专业班级： 电卓103班 学生姓名： 李文帅 指导教师： 朱卫华 设计时间： 2012年1月10日 内 容 摘 要 电压表是测量仪器中不可缺少的设备目前广泛应用的是采用专用集成电路实现的数字电压表。本系统以51单片机为核心，以逐次逼近式A/D转换器ADC080、显示器为主体，设计了一款简易的数字电压表，能够测量0～5V的直流电压，最小分辨率为0.02V。Contents Abstract The voltmeter is indispensable in measuring instruments and equipment, is widely used digital voltmeter ASIC implementation. 8051, successive approximation type A / D converter ADC0809 digital tube display as the main design of a simple digital voltmeter capable of measuring 0 to 5V DC voltage, minimum resolution of 0.02V .The design is divided into several parts, each part of the main components selected for use are determined as follows: 1, microcontroller part. Using a common 8051, according to the need to design a microcontroller circuit. 2, the measurement section. This part is the focus of the experiment, require external acquisition of the analog signal is converted into a digital signal through the microcontroller of the processing and display on the display, the portion determines the main technical indicators such as the precision of the digital voltmeter. According to the needs of the design using successive approximation type A / D converter ADC0809 analog-to-digital conversion.3, the digital display section. One for the integer part, the remaining bits of the fractional part. Index Keywords: 8051 Analog-to-digital Conversion digital display. 目 录 内容摘要……………………………………………………………………………………………2 Contents Abstract……………………………………………………………………………… 3 一 概述 ……………………………………………………………………………………………5 1.1概述………………………………………………………………………………………5 二、设计题目及要求 ………………………………………………………………………………6 2.1、题目及设计要求…………………………………………………………………………6 2.2、主要技术指标 ……………………………………………………………………………6 三、方案论证及选择………………………………………………………………………………7 3.1主要设计方框图如下 …………………………………………………………………7 3.2方案论证：………………………………………………………………………………7