【完美升级版】基于单片机的多路数字电压表设计_本科毕业论文设

本科毕业论文

摘 要

近十几年来，单片机技术的发展极为迅速，广泛应用于生产、生活的各个领域。从测量领域来看，一部分电子测量仪表在高速化、精确化方面有了明显的进步。电子测量仪表精确度的高低，直接影响着企业的经济效益。在我国现有经济水平下，使用单片机开发的电子测量仪表，测量精确而且性价比极高，不仅适用于电压、电流、电阻等的测量，还广泛适用于温度、湿度等测量场合。

本课题设计的多路数字电压表具有性能稳定、携带方便、显示清晰直观、读数准确，大大地减少了因人为因素所造成的测量误差事件，大大的提高了测量的精确度。

关键词：数字电压表；AT89C51；ADC0808

Abstract

In recent years,the technology of SCM has got a jolly rapid development and been widely used in every field of our life and production.Judging from the measure realm,some electronical measuring instruments have remarkable improvments in its speed and accuracy.the accuracy of electronical measuring instruments directly affect enterprises' economic

effectiveness.In

the

current

economic

level

of

our

country,electronical measuring instruments developed by SCM have high accuracy as well as high cost performance,not only can be used to measure Voltage、Current and Resistance,but also be widely used in measuring temperature、humidity or some other Measurement situations.

This topic design of multi-channel digital voltage meter has the

advantages of stable performance, easy to carry, shows the clear and intuitive, accurate readings, greatly reducing the measurement error events caused by human factors, greatly improves the precision of measurement.

Key words: Digital Voltage;AT89C51;ADC0808

目 录

1 引言 .............................................................................................................................................. 1 2 多路数字电压表的总体设计 ...................................................................................................... 1

2.1 设计内容 ........................................................................................................................... 1 2.2 设计方案 ........................................................................................................................... 2 3 硬件设计3.1 单片机控制模块 .................................................................................................. 3

3.2 振荡电路模块 ................................................................................................................... 5 3.3 A/D转换模块 ..................................................................................................................... 5 3.4 显示模块 ........................................................................................................................... 9 3.5 按键模块 ......................................................................................................................... 10 4 软件设计 .................................................................................................................................... 11

4.1 C语言与汇编语言 ....................................................................................................... 11 4.2 主流程图设计 ............................................................................................................... 11 4.3 A/D转换子程序 ............................................................................................................... 12 5 软件调试 .................................................................................................................................... 13

5.1 仿真电路图 ..................................................................................................................... 14 5.2 显示结果及误差分析 ..................................................................................................... 14

5.21 显示结果 ............................................................................................................... 14 5.22 误差分析 ............................................................................................................... 16

6. 结论 ......................................................................................................................................... 17

元件清单 ........................................................................................................................................ 17 参考文献 ........................................................................................................................................ 18 谢 辞 ............................................................................................................................................ 18 程序附录 ........................................................................................................................................ 19

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