文档介绍：河南工程学院毕业设计(论文)
数字电压表
学生姓名
系(部) 电气信息工程系
专业电气自动化技术
指导教师
2009年5月20日
摘要
数字电压表(Digital Voltmeter)简称DVM,它是采用数字化测量技术,把连续的模拟量(直流输入电压)转换成不连续、离散的数字形式并加以显示的仪表。传统的指针式电压表功能单一、精度低,不能满足数字化时代的需求,采用单片机的数字电压表,由精度高、抗干扰能力强,可扩展性强、集成方便,还可与PC进行实时通信。目前,由各种单片A/D 转换器构成的数字电压表,已被广泛用于电子及电工测量、工业自动化仪表、自动测试系统等智能化测量领域,示出强大的生命力。与此同时,由DVM扩展而成的各种通用及专用数字仪器仪表,也把电量及非电量测量技术提高到崭新水平。
本设计主要是以AT89C4051单片机为核心的电压测量系统,该系统能够在单片机的控制下完成对电压信号采集,能够根据采样值进行量程自动转换,并且测量结果可通过四个数码管显示出来。
关键词:
 AT89C4051单片机数字电压表 CD4051模拟开关 LM331压频变换。
Abstract
Referred to as digital voltage meter DVM, It is the use of digital measuring technology, The continuous analog (DC input voltage) converted to discrete, Discrete digital form and the instrument display. The traditional single function pointer voltmeter, low accuracy, can not meet the needs of the digital age, using single-chip digital voltage meter, by the high precision, strong anti-interference ability, scalability, and integration of convenience, can also be carried out with the PC real-munication. At present, from a variety of single-chip A / D converter consisting of digital voltage meter, has been widely used in electronics and electrical measurement, industrial automation instruments, automated test measuring the area of intelligent systems, showing strong vitality. At the same time, the expansion of the DVM from the various general and dedicated digital instrumentation, but also the power and non-power measurement technology to new levels.
The AT89C4051 is a single chip designed for use mainly at the core of the voltage measurement system, which can pleted under the control of single-chip voltage signal acquisition can be carried out according to sampling range automatically converted value and the measurement results can be of four digital control displayed.
Key words:
目录
前言 2
1. 设计方案 3
3
3
2. 电路原理分析 4
4
4
6
6
7
3. 软件设计 8
8
8
结束语 9
参考文献 10
致谢 11
附录 12
前言
传统的指针式电压