毕业论文--基于单片机的温度控制设计.doc

基于单片机的温度控制设计 刘文科 (吉林师范大学信息技术学院2007级 1班 吉林四平 136000) 指导教师: 王国峰(副教授) 中文摘要 关键词　单片机 DS18B20 传感器Principle of a thermometer based on single chip Liu Wenke (Class1 Grade2007 in College of InformationTechnology,Jilin Normal University, Jilin Siping 136000) Directive Teacher: Wang Guofeng(vice-professor) Abstract The late 20th century, with the development of computer science, computer has deep penetration into our lives. Small computers called microcontrollers for us. In this paper, using single-chip AT89S51, temperature sensor DS18B20, ADC ADCO804 temperature controller designed for three-digit significant hardware composition, working principle and software inventory. The same time, the main original internal structure and application methods also made a brief introduction。 Temperature is the main accused in the industrial control one of the parameters, especially in the metallurgical, chemical, building materials, food, machinery and other industries, has a pivotal role. Different places, technology, the required temperature range, precision, the use of temperature measurement devices, temperature measurement and control the temperature will be different, in clothing, food and some light in the range of temperature control, special requirements for precision temperature control equipment and the cost of very sensitive, requiring a temperature control system economical and affordable. This system is a high precision, speed monitoring, temperature measurement and control applications of a wide range of relatively strong temperature control system based on microcontroller. For example, power plants, the temperature must be controlled within a certain range; many chemical reaction process must be carried out under the appropriate temperature; the refining process, crude oil must be carried out under different pressure and temperature fractionation to get gasoline, kerosene, diesel and other products; no suitable temperatures, storage of food will turn bad become ba