数字温度计的设计 数字温度计的设计论文.docVIP

基于DS18B20的数字温度计设计 随着现代信息技术的飞速发展和传统工业改造的逐步实现，能够独立工作的温度检测显示系统应用于诸多领域。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AT8951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4位共阳极LED数码管传送数据，实现温度显示。通过DS18B20直接读取被测温度值，进行数据，AT89C51；温度传感器DS18B20；LED数码管；数字温度计 Design based Digital Thermometer DS18B20 Abstract Along with the present information technologys swift development and traditional industry transformations gradual realization. Able to work independently of the temperature detection and display system used in many other fields. Traditional temperature examination take thermistor as temperature sensitive unit. Thermistors cost is low, needs the sur- 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. Used in the design AT89C51 MCU as the main control device, digital temperature sensor DS18B20 as the temperature components of the anode through the four LED digital display tube parallel transmission of data, to achieve temperature display. This designs content mainly divides into two parts; first, to system hardware part design, including temperature gathering electric circuit and display circuit; Second, to the system software parts design, realizes temperature gathering and the demonstration using the C language. DS18B20 measured by direct reading temperature values,and transfer Data into MCU,and output to show,this is the design of the Digital Thermometer. Its system constitution is simple, the effect of signal gathering is good, the speed of data processing is quick,at al it is advantageous for the actual exam