【摘要】 介绍了一种基于ＲＳ４８５总线的主从分布式温度巡检系统的软硬件结构及主要功能。整个系统以ＰＣ５８６作为主站，以ＡＴ８９Ｃ２０５１单片机、通信接口、传感器接口所组成的电路作为子站，由ＲＳ２３２串口和ＲＳ４８５通信接口实现主站与子站间的联系。该系统构成简单，工作稳定，功能全面，已被应用在热电厂中实现对地下电缆的温度监测更多还原

【Abstract】 The hardware configuration and major functions of a master slave system for dis tributed & itinerant temperature detection based on RS 485 bus is introduced.PC 586 is used as the master station of the system,and AT89C2051 s c microcomputer ,communication interface,sensor interface together are used as slave station,wit h RS 232 serial interface & RS 485 communication interface for communication b etween master and slave stations.The system features with simple structure,stabl e operation & multifunction,which has been used to monitor temperature of undergr ound cables in heat and power plant.更多还原