单总线测温系统  

1-Wire System for Temperature Measurement

作　　者：董炜[1] 王俊杰[1] 杨士元[1] 

机构地区：[1]清华大学自动化系检测与电子技术研究所,北京100084

出　　处：《自动化仪表》2005年第6期27-30,共4页Process Automation Instrumentation

摘　　要：介绍了单总线系统的结构、原理和技术特点,阐述了单总线协议、操作流程以及DS18B20数字式温度传感器的功能结构,实现了一种基于RS-232串口的单总线适配器并给出了设计原理和电路图,最后给出了一种简单高效的单总线器件搜索算法。In this paper, the structure and principle as well as technical characteristics of 1-Wire System are introduced, and the protocol and operation flow of 1-Wire System as well as the function and structure of DS18B20 digital thermometer are described. A 1-Wire adaptor based on RS-232 serial communication port is implemented, its principle of design and circuit diagram are given. Finally, the simplified and effective search arithmetic for 1-Wire components is given.

关 键 词：测温系统 数字式温度传感器 RS-232串口 DS18820 单总线协议 单总线器件 总线系统 功能结构 操作流程 设计原理 搜索算法 电路图 适配器 

分 类 号：TH811[机械工程—仪器科学与技术] TP212.11[机械工程—精密仪器及机械]