课程设计汇本电子温度计.doc

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1、目录1、基于单片机的温度数据采集系统设计方案··············31.1课程设计的要求·················································31.2课程设计目的···················································31.3系统设计总体方案···············································32、系统硬件介绍··············································42.1硬件组成

2、·······················································42.2AT89C51单片计算机的组成原理··································42.2.1组成框图及部总体结构·······································42.2.2单片机各口及其负载能力、接口要求·····························52.3DS18B20数字温度传感器介绍·······························82.3.1功能介绍··

3、···················································82.3.2DS18B20温度传感器的存储器···································102.3.3DS18B20的部逻辑图·········································122.3.4DS18B20读写时序·············································122.3.5存储器操作命令··································

4、·············143、硬件电路设计··············································153.1主控制器·······················································153.2显示电路·······················································164、软件设计····················································164.1主程序模块············

5、········································164.2温度检测流程··················································175、程序的编写与调试·········································185.1程序的编写····················································185.2调试程序······················································

6、·206、仿真调试····················································207、课程设计体会··············································228、参考文献··················································23附1：源程序代码·············································23摘要现代测温应用中，温度计向数字化方向发展。传统的机遇物理方法的温度计功能单一，而数字温度计以

7、其便携，检测精度高，功能多等优点应用的越来越广泛。随着人们生活水平的不断提高,单片机控制无疑是人们追求的目标之一，它所给人带来的方便也是不可否定的，其中数字温度计就是一个典型的例子，但人们对它的要求越来越高，要为现代人工作、科研、生活、提供更好的更方便的设施就需要从数单片机技术入手，一切向着数字化控制，智能化控制方向发展。本课程设计研究四位数字温度计的设计与实现，并采用Protues软件和Keil软件来对其进行仿真，通过电阻值的变化使相应电压发生改变，输出电压经A/D转换后，其值由AT89C51处理，最后将其显示在4个七段数码显示器上。随着技术的发展，

8、一些环境比较恶劣的场合中也能觅得数字温度计的踪迹。在本文中，主要从功能组合，硬件组合，软件算法