高精度数字式温度测量系统的设计与实现

Design and implementation of high precision digital temperature measurement system

本文以DS18B20为温度敏感器件,采用单片机AT89C51核心控制单元设计了一款精度高、抗干扰能力强的数字式温度测量显示系统。温度测量结果由4位共阴极LED数码管显示。系统还设计了报警模块和报警温度调整模块,当温度超过设定温度的上限或下限值时,系统报警。测试表明本文设计的数字式温度测量系统测量精度高、抗干扰能力强,具有广阔的市场应用前景。

A digital temperature measuring system with high precision was designed and accomplished in this paper. The microcontroller AT89C51 and sensor DS18B20 were used as the core controlling device and temperature sensing component in this system, respectively. The measuring results were displayed with LED digital tube. The system has a warning alarm module and temperature adjustment one. When the actual temperature goes beyond the specified up-limit or low-limit values, the system gives alarm signal. The testing and simulation results show the designed system has the advantages of high precision and high capacity of interference-resistance.