基于并行ad的智能温度控制器计设计.doc

摘 要 本设计系统地介绍了基于ADC0809的智能温度控制系统的组成、设计方案、电路原理、程序设计以及系统仿真过程。ADC0809温度控制系统是以AT89C51单片机作为控制核心，数字温度传感Pt100为控制对象，运用C语言编程实现系统的各种功能。该系统由单片机最小系统、传感器电路、ADC0809应用电路，LED七段数码显示电路、电源电路六大部分组成。借助PROTEUS软件，实现了系统电路设计和仿真。，该系统不仅可以高精度的测 得温度的数字值，而且会及时的对温度进行控制，系统具有简单方便、准确可靠，实时性强、 可扩展性好等优点。 关键词：ADC0809，仿真，测量系统，PROTEUS，单片机 ABSTRACT The design systematically introduced the composition,the design, the circuit theory, the program design and the system simulation process of the multipoint temperature measurement system which based on the DS18B20.The DS18B20 multipoint temperature measurement system, the AT89C51 MCU as its control core, digital temperature sensing DS18B20 as its control target, use the C-language programming system to realize the functions. The system composed of six major components,which are the smallest MCU system, the sensor circuit, the alarm circuits, the LCD display circuit, the keyboard, the power circuit. The system realize the circuit design and simulation with PROTEUS software. It applies to the power industry, coal, forest, fire, high-rise buildings and other places,it can also applies to industrial control field with the bad environment. Through the monobus technology of the DS18B20,the system achieve the measurement and monitoring of the long-range environmental temperature. Key words: DS18B20，simulation，measurement system，PROTEUS，MCU 目 录 第1章 绪论………………………………………………………………1 1.1 课题来源…………………………………………………………………………2 1.2 课题研究的目的意义……………………………………………………………2 1.3 国内外现状及水平………………………………………………………………2 1.4 课题研究内容……………………………………………………………………2 第2章 系统方案设计………………………………………………………2 2.1 基于模拟温度传感器设计方案…………………………………………………2 2.2 基于数字温度传感器设计方案…………………………………………………2 2.3 方案论证…………………………………………………………………………2 第3章 电路设计………………………………………………………………2 3.1 工作原理…………………………………………………………………………2 3.2 DS18B20与单片机接口技术……………………………………………………2 3.2.1 DS18B20的引脚功能………………………………………………………2 3.2.2 DS18B20与单片机接口电路………………………………………………2 3.2.3 温度寄存器格式和温度/数据对应关系…………………………………2 3.2.4 单片机对DS18B20的控制方法