南疆地区塑料大棚温湿度控制系统的设计与试验

Design and Test of Temperature and Humidity Control System for Plastic Shed in South Region of Xinjiang

针对南疆地区昼夜温差大、干旱沙漠化的自然气候条件和塑料大棚温湿度控制系统匮乏的状况，采用模块化的设计方法，从硬件和软件两个方面，设计了一种以 STC89 C54单片机为核心的温湿度控制系统，并进行了测试试验。结果表明：昼夜温差为19℃、外界湿度差为17％时，控制系统可以使塑料大棚内温度保持在25～28℃，湿度在50％～60％的适宜大部分农作物的范围内变化。系统设计经济实用、电路结构简单合理、程序运行稳定可靠，可满足南疆地区塑料大棚作业过程中对温湿度控制的要求。

Point at the situation of large temperature difference between day and night ,arid desert climate and the lack of temperature and humidity control system of plastic shed in south region of Xinjiang , a kind of temperature and humidity control system based on STC 89 C54 MCU about hardware and software is designed by using modular design method .Test result shows that control system can maintain the temperature in range of 25-28 degrees C ,humidity in the range of 50%-60%in plastic shed under the condition of temperature difference .The design of system is economical and practical , circuit structure is simple and reasonable ,program is stable and reliable ,and can meet the temperature and humidity con-trol requirements for plastic shed in south region of Xinjiang .