基于SHT75的温湿度监测网络设计  

Design of Temperature & Humidity Monitoring Net Based on SHT75

作　　者：方威[1] 孙玉坤[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《农机化研究》2009年第3期86-88,共3页Journal of Agricultural Mechanization Research

基　　金：江苏省重大成果转化项目(BA2006066)

摘　　要：目标环境中要实现温湿度的精确控制必须进行多点测量。为此,采用多个数字温度传感器SHT75来设计温湿度检测系统,以达到简化软硬件系统提高精度的目的。系统以RS-485为信号传输媒介,以at89c51作为下位机的处理器,给出了总控系统与下位机的互联形式和上位机端Modbus协议的实现方法。此系统具有可靠性较好、测量精度较高、使用方便等特点。Multi-points measuring is necessary for exact temperature ＆ humidity controlling system of the target environment. For this reason,we use several digital temperature ＆ humidity sensors to design the measuring system. It can make the software and hardware designing easier and the measuring precision higher.The paper presents a design for measuring temperature ＆ humidity system that uses at89c51 as lower processor and RS-485 network as the signal transmission media. Also the connection between the lower processor and the supervisor computer as well as the receiving method of Modbus in PC is shown in the paper. The system offers advantages of high reliability,high measuring precision and easy operation,etc.

关 键 词：SHT75 RS-485串行总线 温湿度监控 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]