毕业论文：基于单片机的电阻炉温度控制系统设计9.doc

基于单片机的电阻炉温度控制系统设计 学 院 自动化学院 专 业 班 级 学 号 姓 名 指导教师 负责教师 沈阳航空2010年6月摘 要 在工业生产中，需要对各类加热炉、热处理炉、反应炉的温度进行检测和采用单片机对温度进行控制不仅控制可以，从而能够大大提高产品的质量本论文以电阻炉为研究对象，开发了基于单片机的温度控制系统。本温度控制系统按功能分主要包括温度传感器模块、温度显示设定模块和温度控制模块。温度传感器采用了数字式温度传感器DS18B20，对温度进行实时采样并将模拟信号转换成数字信号返回给单片机。系统可通过键盘对水温进行预设，单片机根据当前炉内温度和预设温度进行运算，控制输出宽度可调的PWM方波，并由此控制双向可控硅的导通和关断来调节电热丝的加热功率，从而使水温迅速达到预设值并保持恒定不变。关键词：；；；Design and Implementation of a Temperature Control System Based on the Single Chip Microcontroller Abstract Various types of furnace, heat treatment furnace, reactor temperature are detected and regulated in the industrial production processes, so they need a proper system of precise control for their temperature. The single chip microcontroller (SCM) have many advantages, such as low power consumption , high performance, reliability, easy-to-market commodity and so on. So the temperature controlled by SCM has low cost, flexible and diverse control method and higher precision, which can greatly enhance the quality of the product. A Temperature Control System is developed based on SCM for a resistance furnace system. This system includes four functional modules that are temperature sensor module, data processing module, temperature display/setting module and temperature-controlling module. Digital temperature sensor DS18B20 is selected to real-time sample of the temperature and to convert analog signals into digital signals that are back to the SCM system. The setting value temperature of this system can be preset through the keyboard. SCM is used to computer PWM control laws based on the current temperature and the preset temperature of the furnace operation. The controlling output is used to control the silicon control in order to regulate the heating power of the heating cord, so the water temperature can quickly reach and maintain setting value. In designing process, first of all, the software is designed, developed and then simulate based on Proteus software , test the device param