单片机的数字温度计设计

文档编号:JD834  文档字数:5021,页数:15

单片机的数字温度计设计

摘  要：随着时代的进步和发展，单片机技术已经普及到我们生活，工作，科研，各个领域，已经成为一种比较成熟的技术。本文将介绍一种基于单片机控制的数字温度计，从硬件和软件两方面介绍了AT89C51单片机温度控制系统的设计, 对硬件原理图和程序框图作了简洁的描述。本设计需要的数字温度计与传统的温度计相比，具有读数方便，测温范围广（－55℃～＋125℃），测温准确，其输出温度采用数字显示，该设计控制器使用单片机AT89S51，测温传感器使用DS18B20，用3位共阳极LED数码管以串口传送数据,实现温度显示,能准确达到以上要求。
关键词：单片机AT89C51；温度传感器DS18B20；模数转换；数码显示。

The Digital Thermometer Supposes

Abstract：With the era of progress and development, SCM technology has become popular we live, work, research, in all fields, has become a relatively mature technology. This paper will introduce a single-chip microcomputer-based control of the digital thermometer, from both hardware and software on SCM AT89C2051 temperature control system design, hardware and procedures schematic diagram of a concise description. The design presented by the digital thermometer with the traditional thermometer, compared to the reading convenience, a wide range of temperature measurement, accurate temperature measurement, digital output temperature revealed that the use of SCM AT89S51 controller design, the use of temperature sensors DS18B20, with a total of three anode to the LED digital serial transmission of data, temperature, can accurately achieve the above requirements.
Key words: single-chip AT89C51;  temperature sensor DS18B20;  analog-to-digital;  digital display.

目录
摘  要 I
Abstract I
前  言 1
1总体设计方案 1
1.1 数字温度计设计方案 1
1.2 总体设计框图 1
2 分块设计 2
2.1主控制器 2
2.2 显示电路 2
2.3 温度传感器 2
2.4 DS18B20温度传感器与单片机的接口电路 6
2.5系统整体硬件电路 6
2.5.1 主板电路 6
2.2.5显示电路 7
3系统软件算法分析 8
3.1 主程序 8
3.2 分布程序 8
3.2.1 读出温度子程序 9
3.2.2 温度转换命令子程序 9
3.2.3 计算温度子程序 10
3.2.4 显示数据刷新子程序 11
4总结与体会 11
参考文献 12
谢辞 13

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