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单总线测温系统
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单总线测温系统 1 -Wire Sy tem for Temperature Mea urement
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。
关键词单总线数字式温度传感器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
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