基于单片机的温度控制报警系统设计详解.doc

摘 要 近年来随着计算机与控制技术的蓬勃发展与广泛应用，人们从中受益良多，生活中也随处可见电子产品，自动化，智能化成为发展趋势，而以单片机为核心的应用正在不断地走向深入，同时带动传统控制检测的日新月益。本设计论述了一种以STC89C51单片机为控制单元，以DS18B20为温度传感器的温度控制系统。该控制系统可以实时存储相关的温度数据并可设置温度上下限值，实现对环境温度测量并在超出范围的情况下发出警告。系统设计了相关的硬件电路和相关应用程序。硬件电路主要包括STC89C51单片机最小系统，测温电路、LCD液晶显示电路以及报警电路等。系统程序主要包括主程序，读出温度子程序，计算温度子程序、按键处理程序、LCD显示程序以及数据存储程序等。 关键词：STC89C51单片机；DS18B20；LCD显示电路 Abstract In recent years, along with the computer and control technology of booming development and wide application, people benefit a lot from it, life also can be seen everywhere electronic products, automation, intelligent become development trend, and with the single chip processor as the core application is continuously to the deepening, and push the traditional control examination on the new victims. This design is discussed in STC89C51 micro control is a control unit, with the temperature sensor DS18B20 for the temperature control system. The control system can store related temperature data real-time and set up and down temperature limits, and to realize the environment temperature measurement and beyond the scope of the warning. The system design of the related hardware circuit and related applications. The hardware circuit STC89C51 mainly includes single chip minimize system, temperature measurement circuit, LCD display circuit, alarm circuit, etc. System program mainly includes the main program, read the temperature procedure, the calculation of temperature procedure, key processing program, LCD display procedures and data storage procedures, etc. key words：STC89C51 single-chip microcomputer ; DS18B20 ; LCD display circuit  目录 摘 要 I Abstract II 1 绪论 1 1.1 课题的背景及其意义 1 1.2 课题研究的内容及要求 1 1.3 课题的研究方案 2 2 电路设计的理论基础 3 2.1 系统设计的框架 3 2.2 单片机发展史 3 2.3 STC89C51系列单片机介绍 4 2.3.1 STC89C51特性 4 2.3.2 STC89C51系列引脚功能 5 3 硬件电路设计 8 3.1 电源电路 8 3.2 温度传感器电路 9 3.3 显示电路 12 3.4 报警电路 13 3.5 复位电路 13 4 软件设计 15 4.1 按键处理子程序 15 5 系统调试及结论分析 17 5.1 硬件调试 17 5.1.1 硬件电路故障及解决方法 17 5.1.2 硬件调试方法 17 5.2 软件调试 1