此乃一测温程序，DS18B20为美国DALLAS公司(已被MAXIM公司并购）生产的单线数字温度传感器，可将温度信号直接转换成数字信号供单片机处理，所测温度范围-55°C～125°C-This is a measurement procedure, DS18B20 U.S. DALLAS Corporation (M &　A has been MAXIM) production of one-way digital temperature sensor, the temperature signal can be directly converted into single-chip for digital signal processing, the measured temperature range of-55 ° C ~ 125 ° C