基于DHT11温湿度测控系统的设计

依据DHT11温湿度传感器的工作原理,设计了以单片机STC89C52RC为主控核心的实验室温湿度测控系统.在硬件方面,主要设计了单片机最小系统电路、DHT11与单片机的连接电路、12864液晶显示电路、蜂鸣器报警电路及抽湿机驱动电路.在软件方面,主要编写了DHT11检测温湿度程序、12864显示程序、报警程序及驱动抽湿机动作的程序.实验表明,所设计的系统可以正常工作,系统运行状态良好.

The Measuring and Controlling System Design of Temperature and Humidity Based on DHT11

According to the principle of temperature and humidity sensor DHT11, the system of controlling tempera- ture and humidity is designed with STC89C52RC single-chip microcomputer as the controlling core of system. In terms of hardware, the smallest system circuit of single-chip microcomputer, eonnecting circuit between single-chip microcomputer and DHT11, displaying circuit of 12864, alarm circuit of beeper and driving circuit of dehumidifier are designed; In terms of software, the program is written including continually measuring temperature and humidity, 12864 displaying, alarm and driving dehumidifier motion. The experiment demonstrates that the system designed can work normally and the state of operating is good.