自动选档数字电压表的设计毕业论文.doc

自动选档数字电压表的设计
自动化专业
摘要
数字电压表自诞生以来被广泛应用于工控,教学及社会生产中,需要测量电压电流值的各种场所。
本文研究基于单片机的自动选档数字电压表的设计,本设计的数字式电压表,具有可自动选档,实用性高,测量精准等特点。通过对现有的各种方案分析,采用以单片机为中央处理器,接收到电信号后,利用芯片及设计电路完成A/D转换功能,通过对电信号的转换由LCD显示结果,完成测量过程。本文给出了具体的硬件设计电路和软件结构,文中给出了系统硬件线路的设计要点和电路结构以及软件的设计要点。
本文设计的数字电压表,其硬件电路所用元件较少、成本低、调节简单;软件程序采用C语言编写,可读性强。经过理论研究、原理设计和整机调试,实验结果表明,本设计达到了可自动选档,测量精准等初步要求。
关键词: 数字电压表单片机 LCD A/D转换
The design of a Digital Voltmeter of function of Automatic selected stalls
Abstract
Digital Voltmeter since its created that has been widely used in a variety of palce,such as industrial, teaching and social production where is that voltage and current values measured.
This article is about the design of a Digital Voltmeter of function of Automatic selected stalls,the microcontroller-based Digital Voltmeter of the function that is Automatic selected stalls,high availablity and precise measurement. Analysis on the various programs,put the Microcontroller as the central processor received electrical signal , A/D conversion function achieved by using the chip and circuit design, when the transformed electrical signal displayed by the LCD ,the measurement process this paper, a detailed description of the design of the system hardware circuit design and structure, as well as the design of software ,all of about that is given.
The digital voltage meter designed in this paper, have ponents in the hardware part, lower cost and easier testing; software used C programming language which is strong readability. After theoretical research, principle design and debugging, the experimental results suppose it is feasible of choosing this program .
Key words: Digital Voltmeter Microcontoller LCD A/D conversion
目录
前言 1
第1章 整体设计 4
4
4
6
7
第2章系统的硬件结构 8
8
9
第3章软件程序设计 27
27
28
28
第4章制作与调试 29
29
29
第5章数字电压表的抗干扰设计 31
31
32