單總線測溫系統(tǒng) 1 -Wire Sy tem for Temperature Mea urement

摘要介紹了單總線系統(tǒng)的結(jié)構(gòu)、原理和技術(shù)特點(diǎn)，闡述了單總線協(xié)議、操作流程以及DS18B20 數(shù)字式溫度傳感器的功能結(jié)構(gòu)，實(shí)現(xiàn)了一種基于RS - 232 串口的單總線適配器并給出了設(shè)計(jì)原理和電路圖，最后給出了一種簡單高效的單總線器件搜索算法。
關(guān)鍵詞單總線數(shù)字式溫度傳感器iButton DS18B20
Abstract 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.
Keywords 1 - Wire System Digital thermometer iButton DS18B20