基于SHT11的温室多点测量系统设计

Design of greenhouse multi-points measuring system based on SHT11

温室内要实现温湿度的精确控制必须进行多点测量。基于这一要求,本文采用多个数字温湿度传感器SHT11来设计温室测量系统,以达到简化软硬件系统设计,提高测量精度的目的。首先介绍了SHT11的结构特点、接口电路和工作时序,然后确定了采用多个SHT11组成的温湿度测量系统的软硬件设计方案,最后基于AT89S52单片机设计了电路简洁、大大节省I/O口资源、具有现场独立显示和远距离通信功能的多点温湿度测量系统,并编写了PC机端直观的数据观测界面程序,为现代化温室的集中管理提供了条件。

Multi-points measuring is necessary for greenhouse＇s exact temperature ＆ humidity controlling system. For this reason, we use several digital temperature ＆ humidity sensors to design the greenhouse measuring system, It can make the software and hardware designing easier and the measuring precision higher. Firstly,the paper, introduces SHT11＇s structure characters, I/O connecting circuit and working schedual. The scheme that how to design the software and hardware of temperature ＆ humidity measuring system by using several SHT11 is presented. Finally, A temperature ＆ humidity measuring system based on AT89S52 is designed. The advantages of the system are simple hardware, less I/O resource, self-displaying and long distance communication. Furthermore, A data observating interface in the PC terminal is programmed, which can provide a good condition for concentrative management of modern greenhouse.