基于单片机的多点温度测试系统_毕业设计论文.doc

PAGE 基于单片机的多点温度测试系统 摘 要 集成电路的大规模发展对单片机控制电路的实际运用有着巨大的推动作用。单片机具有体积小、重量轻、价格便宜、低功耗、控制功能强及运算速度快等特点，使其在测控系统、智能仪表、机电一体化产品、智能接口等方面具有较广泛的运用。以单片机为核心，运用温度传感器可完成对温度采集，并进行相应的处理。 本系统利用4片温度传感器DS18B20把所测得的温度发送到AT89C52单片机上，通过单片机的处理发送到显示单元进行显示。系统运用单片机进行温度上下限设定，对各点温度进行测控报警，运用主从分布式思想，实现温度的远程控制，构成多点温度检测系统。 关键词 单片机，温度传感器，多点温度检测 ABSTRACT The practical application of large-scale development of the integrated circuit chip control circuit has a tremendous role in promoting. MCU with a small size, light weight, inexpensive, low-power, control and computing speed, has a wider use in the monitoring and control systems, intelligent instruments, mechanical and electrical integration products, intelligent interface. With the single chip processor as the core, the application of temperature sensor for temperature acquisition can be completed, and carry on corresponding processing. This system, using four slices of DS18B20, sent the temperature measured by the temperature sensor DS18B20 to AT89C52 single-chip computer, through the MCU processing, the temperature is sent to the display unit to display. The system uses the MCU to set upper and lower temperature, to measure and control the point temperature and alarm. At the same time, use the main distributed thought to achieve remote control of the temperature, and to constitute a multi-point temperature detection system. Key Words: MCU, Slice, Multi-point temperature detection 目 录 TOC \o 1-3 \h \z \u 1.绪论 h 1 1.1课题背景 h 1 1.2国内外发展现状 h 1 1.3本设计的内容及任务 h 2 1.3.1设计内容 h 2 1.3.2设计任务 h 2 2.系统总体设计 h 3 2.1系统概述 h 3 2.2系统工作原理 h 3 2.3系统器件的选择 h 4 2.3.1单片机的选择 h 4 2.3.2温度传感器的选择 h 5 2.3.3显示器的选择 h 8 3.系统的硬件设计 h 10 3.1单片机最小系统的设计 h 11 3.1.1 时钟电路的设计 h 11 3.1.2复位电路的设计 h 11 3.2温度采集模块的设计 h 12 3.3 LCD显示电路 h 13 3.4 键盘电路 h 14 3.5 声光报警电路 h 15 4.系统的软件设计 h 16 4.1工作方案简介 h 16 4.2主程序流程图 h 16 4.3温度读取转换模块 h 17 4.4LCD液晶显示模块 h 19 4.5按键处理模块 h 20 4.6声光报警模块 h 21 5.系统的软件仿真 h 22 6.总结 h