自动选档数字电压表的.docVIP

诚信申明 本人申明： 我所呈交的本科毕业设计（论文）是本人在导师指导下对四年专业知识而进行的研究工作及全面的总结。尽我所知，除了文中特别加以标注和致谢中所罗列的内容以外，论文中创新处不包含其他人已经发表或撰写过的研究成果，也不包含为获得北京化工大学或其它教育机构的学位或证书而已经使用过的材料。与我一同完成毕业设计（论文）的同学对本课题所做的任何贡献均已在文中做了明确的说明并表示了谢意。 若有不实之处，本人承担一切相关责任。 本人签名： 年 月 日  自动选档数字电压表的设计 自动化专业 0902班 学号111111111 指导教师 王凌 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 is completed.In 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 less components 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