智能烘箱温度控制器设计大学课题论文.docVIP

智能烘箱温度控制器设计 摘要: 电烘箱在机械、冶金、化工等行业具有广泛的应用，如机械零件的热处理。在某些情况下，要求对电烘箱的温度实现准确控制，若采用一般控制方法则难以实现。 以铂热电阻温度传感器PT100作为感应烘箱温度传感器，它将温度的变化转换为电阻阻值的变化，由铂热电阻PT100组成的测量电桥将烘箱温度的变化转换成电压信号变换、再经集成运放7650放大成0～5V的模拟电压信号后，经ADC0804转换成8位数字信号送入AT89C52单片机系统， AT89C52单片机对所采集的数据经数字滤波、变换等处理后送入164显示模块进行显示，同时输出控制量，控制可控硅的导通从而控制加热装置开启或关闭，实现对烘箱温度的智能控制。 本次设计所要求实现的温度测量范围为0℃～300℃，分辨率为±1℃。测量结果用3位LED数码管显示。 设计中利用STC89C52系列单片机实现了实时温度采样、智能控制，有较高的实用价值；此外，采用数码显示和键盘输入实现了“人机对话”，充分满足了使用者对于产品使用便捷直观的要求。 关键字:温度传感器、A/D转换 、实时测温 指导教师签字： The development of Intelligent Oven System Student Name： aoxi Classe：098205234 Supervisor： henlijuan Abstract : Electric oven in the machinery, metallurgical, chemical and other industries has a wide range of applications, such as mechanical partsannealing.Under certain circumstances, the oven temperature is reguired to achieve accuratecontrol,such as the general control methods will be difficult to achieve. Platinum resistance to heat as the temperature sensor PT100 sensors oven temperature sensitive components, It will change the temperature of the resistance to the resistance changes, Platinum by the thermal resistance of Surfacing Bridge will be measured temperature of the oven converted into voltage signal conversion, then integrated operational amplifier 7650 enlarge 0 ~ 5V voltage signal simulation. After ADC0804 converted into eight digital signal into AT89C52 system, AT89C52 of the data collected by digital filtering, After processing transform into 164 Module for, and determine whether the effective temperature range beyond, thus completing the measurement of temperature. The design calls for the temperature measurement range of 0 ° C to 300 ° C, resolution of ± 1 ° C. Measurement results using three digital LED Display. Design Series MCU STC89C52 use real-time temperature sampling, intelligent control, have high practical value; In addition, the use of digital display and keyboard input of the man-machine dialogue fully