基于单总线协议的多点测温技术及应用  

Application of Multiple Points Temperature Measurement Based on One-wire Bus

作　　者：常志勇[1] 李济顺[1] 韩红彪[1] 

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003

出　　处：《河南科技大学学报（自然科学版）》2009年第2期35-37,共3页Journal of Henan University of Science And Technology:Natural Science

基　　金：河南省基础与前沿技术研究计划项目(082300413202)

摘　　要：为了对幼苗培养室的温度实施检测,本文采用C8051F020单片机和数字式温度传感器DS18B20,设计了分布式的多点温度测量和报警系统,使用总线驱动芯片74LS245驱动DS18B20,提高了驱动能力,延长了传输距离,增强了系统的可靠性,并根据DS18B20的单总线协议编写了软件。实践表明,该系统工作稳定,操作方便,温度测量误差为±0.5℃,实现了对多点温度的测量和报警,满足了系统设计要求。In order to detect different position's temperature in the seedling raise room,and control them at proper temperature,a multiple points temperature measureing and alarming system is designed by using C8051F020 SCM and digital temperature sensor DS18B20.Meanwhile the bus driver 75LS245 to drive DS18B20 is used,which can improve the drive capacity,extend the transmission distance,and enhance the reliability of the system.The software is designed according to the one-wire bus agreement.Practice shows that the system works steadily and can be operated easily,realizes the multiple points temperature's measurement and alarm.The inaccuracies of measuring temperature is ±0.5℃,and meets the system requirements.

关 键 词：多点温度测量 DS18B20 单线协议 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]