目前DS18B20数据的采集方法,存在不能自动更新DS18B20序列号和定位DS18B20的不足,因此不能及时进行DS18B20的更换。本课题利用单片机I/O端口号和DS18B20的温度报警触发器(TH和TL),作为在外部存储器中的存储地址和DS18B20的物理地址,实现了DS18B20和ROM序列号的自动更新,和温度数据的准确定位。并给出了软、硬件设计。 Currently DS18B20 data acquisition methods, there is not automatically update DS18B20 serial number and positioning DS18B20 inadequate, it can not be replaced DS18B20 in time. This topic uses the MCU I / O port number and DS18B20 temperature alarm triggers (TH and TL), as a storage address in the external memory and the DS18B20 physical address to achieve the DS18B20 and ROM serial number automatically updated, and temperature data Accurate positioning. And gives the software and hardware design.