The Greenhouse Temperature Control System
Basedon AT89C52 MCU
Abstract
The growth of vegetablesis closely related to the temperature,
for vegetable greenhouses, the most important factors of the
managements are the temperature control. The temperature is too high;
the growth rate will stop or slow down. That is why it is necessary
to always control temperature within the context of growing
vegetables in suitable. If only depends on the manual control both to
consumer the manpower, and easy to have mistaken. Therefore, usually
there are automatic control systems of temperature in modernized
vegetable canopy management, in order to control the temperature of
vegetable canopy, adapt to producing the need.
This design is controlled through the microcontroller， to achieve
automatic control of vegetable greenhousetemperature. The system
based on the AT89C52 MCU, through digital and analogue temperature to
be detected, by display shows the current temperature. When the
collected temperature higher than 20 ℃, the motor will drive the rotation
of the fan, and automatic control the temperature of the greenhouse.
And as the temperature is increased by 5 ℃, the motor rotation speed
doubled. When the detected temperature is higher than 35 ℃, send out the
alarm signal.
[Key words]Temperature control of the greenhouses system AT89C52
18B20LCD1602 motor
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