基于单片机的温度检测系统-毕业论文.doc

毕 业 设 计 设计题目：（）基于单片机的温度检测系统设计 摘要在日常生活及工业生产过程中，经常要用到温度的检测及控制，温度是生产过程和科学实验中普遍而且重要的物理参数之一。在生产过程中，为了高效地进行生产，必须对它的主要参数，如温度、压力、流量等进行有效的控制。温度控制在生产过程中占有相当大的比例。温度测量是温度控制的基础，技术已经比较成熟关键词： DS18B20温度传感器 温度检测 Design of Temperature Detection System Based On SCM Abstract The detection and control of temperature is often used in daily life and industrial production process, temperature is one of the important physical parameters of the production process and scientific experiments generally. During the production process, in order to carry out the production efficiently, we must control its main parameters well, such as temperature, pressure and so on .Temperature control in the production processes a large proportion. Temperature measurement is the basis of temperature-controlling and a more mature technology. A precision temperature control system used AT89S51 SCM and the hardware circuit and software of this system are introduced. Schematic diagram of the hardware and procedures is related in emphasis. Working principle, design and implementation is elaborated. The current temperature is measured by DS18b20 temperature sensor and the results is transported into SCM .Then ,the temperature is calculated and the conversion results is transported into the liquid crystal display modules 1602 on show .It can display current temperature which is set randomly and controlled flexibility, and the temperature control.When the temperature is beyond the upper and lower limits of temperature, the alarm system starts automatically. What is realized in this system is simple structure, reliable performance and high precision control. The system is in good scalability，high-resolution，wide range，anti-interference performance and so on． Key Words：AT89S51 SCM；DS18B20 Temperature sensor；Temperature detection 目 录 1 绪论 1 1.1国内外温度检测技术概述 1 1.1.1温度检测技术简介 1 1.1.2温度检测技术的发展 4 1.2单片机技术的发展及应用 5 1.2.1单片机技术的发展 5 1.2.2单片机技术的应用 6 2 方案论证 8 2.1题目分析 8 2.2温度传感器的选择 8 2.2.1采用模拟集成温度传感器 8 2.2.2采用数字单片智能温度传感器 9 2.3显示器的选择