3基于单片机的数字电压表设计与制作.doc

编号: 湖北文理学院理工学院 本科毕业论文（设计） 题 目 基于单片机的数字电压表设计与制作 电子科学与信息工程 系 通信工程 专业 学 号 学生姓名 方雪峰 指导教师 付盼丽 起讫日期 2015.12 ~ 2016.4 基于单片机的数字电压表设计与制作 摘要：随着社会的飞速发展对电子产品的需求与精度的越来多与高，而数字电压表对于设备与实验的测试。数字电压表及DVM他是一种数字化的测量技术，是将一些连续的电压转化为离散的点来一个一个表示。其实日常生活中我们最为了解的就是数字式的万用表，就从万用表可以看的出数字电压表的在生产生活中的便捷精度高，可运用范围广而且成本低。根据设计要求，本文完成了一款性能稳定、高精度的数字电压表的硬件设计和软件设计。该电压表可测量最大5V和最小0V的直流电压。硬件部分主要包括：单片机，ADC0809模数转换，外接电路和LED显示四大部分。软件设计主要包括C语言源程序的编写与调试，并在Proteus上进行软硬件仿真。经仿真测试该数字电压表显示精度为0.019V，最大误差为0.02V。 关键词：数字电压表；A/D转换；AT89C52；ADC0809 Design and Making of Digital Voltmeter Based Abstract：With the rapid development of social demand for electronic products with the precision of the more and more high, and the digital voltmeter for equipment and experimental test. Digital voltmeter and DVM, he is a kind of digital measurement technology is to some continuous voltage into discrete points to one by one. In daily life we know the most is the digital multimeter, from the multimeter can look out of the digital voltmeter is convenient with high precision in the production and living, can use a wide range and low cost. According to the design requirements, this paper completed a stable performance, high precision of hardware design and software design of digital voltmeter. The meter can measure the minimum and maximum 5 v 0 v dc voltage. Hardware mainly includes: single chip microcomputer, ADC0808 modulus conversion, An external circuit and LED display. Software design mainly includes the writing of the C language source program and debugging, and hardware and software on the Proteus simulation. Through the simulation test of the digital voltmeter shows accuracy of 0.01 9V, the maximum error of 0.02 V. Keywords： Digital voltmeter; A/D converter; AT89C52; ADC080目 录 1 绪论1 1.1课题背景 1 1.2设计的目的和意义 3 1.3设计的主要任务 3 2总体方设计案5 2.1