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本设计围绕温室大棚的温湿度参数,采用智能温湿度传感器DHT11作为检测元件,可以直接读出被测温湿度值,并且内置A/D转换器(分辨率为8～12位),采用单线总线与处理器相连,减少了外部的硬件电路,具有低成本和易使用的优点。设计使用STC98C52单片机作为主控制器,读取DHT11检测的温湿度,通过运算处理后,由4位数码管进行显示。
The design around the greenhouse temperature and humidity parameters, the use of intelligent temperature and humidity sensor DHT11 as a test element, you can read out the measured temperature and humidity values, and built-in A / D converter (resolution of 8 to 12), the use of single-wire bus Connected to the processor, reducing the external hardware circuit, with the advantages of low cost and easy to use. The design uses STC98C52 one-chip computer as the main controller, reads the temperature and humidity that DHT11 examines, through the operation processing, reveal by 4 nixie tubes.