毕业设计（论文）基于AT89S52设计数字电压表.doc

目录 摘要： I Abstract: II 第一章 绪论 1 1.1 选题缘由及意义 1 1.2 发展现状及趋势 2 第二章 数字电压表设计总体方案 4 2.1 系统概述 4 2.2 设计方案论证与选择 4 2.2.1 单片机的选择 4 2.2.2 A/D转换芯片的选择 4 2.2.3 显示方式及总体方案 5 第三章 软件设计及仿真电路 6 3.1 仿真电路 6 3.1.1 单片机模块 6 3.1.2 LED显示 6 3.1.3 A/D转换模块 7 3.1.4 仿真结果 8 3.2 软件总体设计 9 3.2.1 软件流程 9 3.2.2 程序设计 9 第四章 硬件电路设计 10 4.1 硬件介绍 10 4.1.1 单片机引脚及其功能 10 4.1.2 ADC0832简介 10 4.1.3 LED数码管内部结构及功能 11 4.2 电路原理图设计 12 4.3 PCB设计及实物制作与调试 13 结论 14 参考文献（References） 15 谢辞 16 附录 17 基于AT89S52设计数字电压表 摘要：随着电子科学技术的不断发展和进步，电测量已经成为广大电子工作者必须掌握的手段，对测量的精度和范围也越来越高，而电压测量甚为突出，因为电压的测量相对更普遍。数字表与表相比，读数直观、准确显示范围宽分辨率高输入阻抗大集成度高功耗小抗干扰能力强可扩展能力强等特点。因此在电压测量和电压校准中有着较为广泛的应用。本文设计的数字电压表，其硬件电路所用元件较少、成本低、调节简单经理论研究、原理设计和整机调试，实验结果表明，该方案可行。 The design of digital?voltage?meter based on?AT89S52 Abstract: With the development of Electronic Science and technology?progress, the electronic measurement has become a vast number of electronic?workers must?mastered, measurement accuracy and scope are increasingly high, and the voltage?measurement?is very prominent, because the voltage measurement is?relatively more common. Compared with the traditional analog voltage meter, the digital voltage meter have more intuitionistic and accurate readings, moreover?also has the?display?range, high resolution, input?impedance, high integration, low power consumption, strong anti-interference ability, strong extensible ability. So digital?voltage meter?has been widely used?in?measuring the voltage?and the?voltage calibration. This paper introduced is a digital voltage meter based on AT89S52 microcontroller, the digital voltage meter circuit design using the ADC0832 that is dual channel,8bit resolution of A/D conversion chip,4bit LED display screen, the core control chip using AT89S52 single chip microcomputer. The voltage is adjustable digital voltage meter, capable of measuring DC voltage range is 0-2V, 0-20V, 0-200V, 0-2000V. This paper introduces the function and application of each chip pin, the working principle of the circuit of sof