温室大棚温湿度调控技术.doc

摘 要 随着大棚技术的普及，温室大棚数量不断增多，对于蔬菜大棚来说，最重要的一个管理因素是温湿度控制。温湿度太低，蔬菜就会被冻死或则停止生长，所以要将温湿度始终控制在适合蔬菜生长的范围内。传统的温度控制是在温室大棚内部悬挂温度计，工人依据读取的温度值来调节大棚内的温度。如果仅靠人工控制既耗人力，又容易发生差错。现在，随着农业产业规模的提高，对于数量较多的大棚，传统的温度控制措施就显现出很大的局性。为此，在现代化的蔬菜大棚管理中通常有温湿度自动控制系统，以控制蔬菜大棚温度，适应生产需要。 本论文主要阐述了基于AT89C52单片机的西红柿大棚温湿度控制系统设计原理。该系统主要由单片机、数字温湿度传感器DHT11、无线通信模块APC220、液晶显示LCD1602、键盘等组成。采用温湿度传感器DHT11来测量温湿度，它的精确度高，而且DHT11直接是输出数字信号，可直接与单片机相连。通过无线传感器APC220来进行信号传送，这样能够降低布线的麻烦。显示部分使用的是LCD1602来显示温湿度。本系统还有附带键盘，能够对大棚所需要的温湿度上下限值直接设定和修改。本系统的核心是单片机AT89C52，接收传感器所测的数据并处理，然后执行各种操作，如喷水，吹风等。 关键词：单片机 数字温湿度传感器DHT11 无线通信模块APC220 显示模块LCD1602；温湿度；控制系统；传感器 Abstract With the popularization of trellis technology, greenhouse trellis an ever-growing number, for vegetable shed speaking, one of the most important management factor is the temperature and humidity control. Temperature is too low, the vegetables will freeze to death or stop growing, so will always control temperature and humidity in a suitable vegetable growth range. Traditional temperature control is in greenhouse trellis internal hanging a thermometer, workers according to regulate the temperature reading the temperature inside the shelter. If only by artificial control both consumption manpower, and easy to place regular orders. Now, with the improvement of agricultural industry scale, for larger quantity of trellis, traditional temperature control measures will show great bureau sex. Therefore, in modern vegetable shed management zhongtong often temperature and humidity automatic control system, in order to control the temperature, adapt to the trellis vegetable production needs. This thesis mainly elaborated based on AT89C52 tomatoes canopy temperature and humidity control system design principle, main circuit design and software design, etc. The system consist of the microcontroller ,digital temperature and humidity sensor DHT11,wireless sensor APC220,LCD1602,keyboard and other components. Temperature and humidity sensor DHT11 is used for measuring temperat