毕业论文：单片机温度控制98.doc

综合课程设计报告 报 告 题 目 ：基于DS18B20温度传感器的 温度显示系统 作者所在系部： 机械工程系 作者所在专业： 测控技术与仪器 作者所在班级： B08121 作 者 姓 名 ： 肖昭 作 者 学 号 ： 20084012104 指导教师姓名： 刘健 刘宝华 完 成 时 间 ： 2011年12月28日 摘 要 传统的温度检测以热敏电阻为温度敏感元件。热敏电阻的成本低，需信号处理电路，可靠性相对较差，测温准确度低，检测系统也有一定的误差。与传统的温度计相比，具有读数方便，测温范围广，测温精确，数字显示，适用范围宽等特点。选用89C52型单片机作为主控制器件，DS18B20数字温度传感器作为测温通过传送数据，实现温度显示。设计了一个基89c52单片机的温度监控报警系统，该系统以89c52为主控制器，以芯片为温度传感器，对温度信息进行采集、放大并进行实时显示。此外，，当测试温度达到报警温度值或超出温度测量范围，系统能够给出报警指示并进行语音报警，通过DS18B20直接读取被测温度值，进行数据，89C52；温度传感器DS18B20；LEN数码管 Abstract Traditional temperature examination takes thermistor as temperature sensitive unit. Thermistors cost is low, needs the signal processing electric circuit, moreover the reliability is relatively bad, the temperature measurement accuracy is low, the examination system also has certain error. Compares with the traditional thermometer, what this design is based on the DS18B20 digital thermometer, it has the reading to be convenient, the temperature measurement scope is broad, the temperature measurement is precise, the digit demonstrated that applicable scope wide and so on characteristics. In this design as the main selection STC89C52MCN control device,using the DS18B20 digital temperature sensor as a temperature measurement devices,the parallel transmission of data tansmitted through SNL245N digital tube,to achieve the temperature display.A MCU STC89c52-based temperature monitoring alarm system is designed in the paper. The system takes MCU STC89c52 as the main controller, DS18B20 as the temperature sensor, and performs temperature information collecting, zoom, and real-time display. In addition, Temperature alarm with digital display, LED shows the alarming-temperature, alarm when the temperature reaches the test temperature value or goes beyond the scope of temperature measurement, the system can give voice instructions and report through telephone dial-up