毕业设计（论文）-基于单片机数字电压表的设计和仿真.doc

摘要
本文介绍的是数字电压表的发展背景和利用单片机,A/D 转换芯片结合的方法设计一个直流数字电压表。它的具体功能是:最高量程为 200V,分三个档位量程,即2V,20V,200V,可以通过调档开关来实现各个档位,当测得电压的数值小于1V时,系统会自动的将电压数值转换为以mV为电压单位的电压值,并且通过按键的方法能够测得后五秒的平均电压值。
单片机是一种集成电路芯片,采用超大规模技术把具有数据处理能力(如算术运算,逻辑运算,数据传送,中断处理)的微处理器(CPU)。随着单片机技术的飞速发展,各种单片机蜂拥而至,单片机技术已成为一个国家现代化科技水平的重要标志。
单片机可单独地完成现代工业控制所要求的智能化控制功能,这是单片机最大的特征。单片机控制系统能够取代以前利用复杂电子线路或数字电路构成的控制系统,可以软件控制来实现,并能够实现智能化,现在单片机控制范畴无所不在,例如通信产品,家用电器,智能仪器仪表,过程控制和专用控制装置等等,单片机的应用领域越来越广泛。
本毕业设计的课题是"简易数字电压表的设计"。主要考核我们对单片机技术,编程能力等方面的情况。观察独立分析,设计单片机的能力,以及实际编程技能。
本课题主要解决A/D转换,数据处理及显示控制等三个模块。控制系统采用AT89C51单片机,A/D转换采用TLC2543。
关键字介绍:单片机,AT89C51,A/D 转换,TLC2543,数据处理
Abstract
This paper is the background of the development of digital voltmeter and using single puter, A/D conversion chip design method of bination of the party A dc digital voltmeter. It is the specific function of: supreme range for 200 V, divide a gear range, namely 2 V, 20 V, 200 V, can switch to achieve each by shifting gear gear, when the voltage of the numerical less than 1 V, the system will automatically will convert to mV voltage values for the voltage is the voltage unit, and through the key method can measure five seconds after the average voltage.
MCU is a kind of integrated circuit chip, using the technology with large scale data processing ability (such as the art operations, logic operations, data transfer, interrupt handling) of the microprocessor (CPU). With the rapid development of the single chip puter, all kinds of single chip in great Numbers, microcontroller technology has e a national modernization level of science and technology.
SCM plete modern industrial control alone for the intelligent control function, it is the greatest feature of single chip puter. Single-chip puter control system can be replaced plex electronic circuit or before digital circuit consists of the control system system, can control software to achieve, and to realize intelligent, now single-chip puter control category is everywhere, such munication products,