基于单总线温度测控系统的前端拓扑网络设计

Design of Front-end in Temperature Measure and Control System Based on 1-Wire Bus

温度测控系统的前端模块的设计基于单总线(1-Wire Bus)技术,利用数字温度传感器DS18B20构建成1-Wire树型拓扑网络,最大限度地减少单片机的硬件资源占用.软件设计中采用二叉树搜索算法自动完成整个网络的器件搜索.系统设计了完善的上下位机间的通讯协议来保证温度采集的数据的传输的可靠性和准确性,为上位机控制系统提供实时、准确的数据.

The design of front-end module is based on a single bus（ 1-Wire Bus） technology,and constructs topology tree of 1-Wire network by utilizing digital Thermometer DS18B20 to minimize occupation of MCU＇s hardware resources. The design of program completes its exploration by means of binary tree data structure. This design perfects the communication agreement of front-end module to guarantee reliability and accuracy of temperature acquisition. Meanwhile, it can transmit the exact data to the controlling center system in time.