基于美国DALLAS公司推出的数字温度传感器DS18B20,给出了一个温度测量与显示系统的设计方法。该系统由51单片机AT89C52控制,并由8位数码管显示实时温度,通过该系统可设置温度上限与下限,以便在温度超过限值时进行报警-DALLAS U.S. based company launched the digital temperature sensor DS18B20, gives a temperature measurement and display system design methods. The system consists of 51 single-chip AT89C52 control by 8 digital tube display real-time temperature, the temperature can be set through the system upper and lower limits for the temperature exceeds the alarm limit