数字式多路温度采集系统的设计 毕业论文.doc

目 录 摘要 (1) 关键词 (1) 前言 (1) 1、概述 (2) 1.1选题的研究目的和意义 (2) 1.2温控系统在国内外的发展状况 (2) 2、总体设计及功能 (3) 2.1 总体方案 (3) 2.2 功能介绍 (4) 3、硬件设计 (4) 3.1 温度采集系统设计 (4) 3.1.1温度传感器DS18B20的性能和结构 (4) 3.1.2 DS18B20工作原理 (5) 3.1.3 温度传感器DS18B20的应用电路 (7) 3.1.4 温度采集系统硬件原理图 (7) 3.2 AT89C51的介绍及功能结构 (8) 3.2.1 AT89C51的介绍 (8) 3.2.2 最小系统原理图 (10) 3.3 LCD显示系统 (11) 3.4 按键设置电路 (12) 3.5 声光报警电路 (13) 3.6 温度采集系统总电路图 (14) 4、软件设计 (15) 4.1 主程序流程图 (15) 4.2 温度采集系统软件设计流程 (16) 4.3 显示子程序流程图 (18) 4.4 按键子程序流程图 (18) 5、系统仿真 (18) 5.1 仿真总电路图 (18) 5.2 仿真和调试 (19) 5.2.1 仿真设置 (19) 5.2.2 调试和分析 (20) 6、总结 (21) 致谢 (21) 参考文献 (22) 附录 (23) 数字式多路温度采集系统的设计 摘要：本设计是制作一个单片机控制的数字式多路温度采集系统。采用了AT89C51芯片为主控制器，通过一线制温度传感器DS18B20实现温度采集，将信息通过C51芯片处理后在LCD中显示。此设计实现了四路温度的实时监控，通过按键方式进行手动切换通道，在LCD特定位置显示具体的温度，同时设有五个开关根据需要任意设定上下限定报警温度。 系统检测温度范围为－55～＋125测温分辨率可达0.0625Abstract: the design is making a single chip microcomputer control digital multi-channel temperature gathering system. The AT89C51 chip primarily controller, through a wire temperature sensor DS18B20 realize temperature gathering, the information through the C51 chip in LCD display after. This design realize the four ways of real-time monitoring of temperature, through the key ways switch manual channel, in LCD display specific temperature particular location, at the same time, with five switch according to need any set up and down the temperature limit alarm. System testing temperature range for -55 ℃ ~ +125 ℃, the temperature sensor resolution 0.0625 ℃. It is easy to use, with high precision, wide range, high sensitivity, small volume, low power advantage, suitable for everyday life and temperature measurement, also can be used as temperature processing module embedded in other systems, as other system of auxiliary expansion. And, the system structure is simple, strong anti-interference, suitable for a harsh environment temperature measurement on the spot, and has a broad prospect of application. 关键词：AT89C51；DS18B20；报警系统；LCD Keywords: AT89C51; DS18B20; Alarm system; LCD 前言 随着人