Temperature And Humidity Control System Of Warehouse Based On The MCU

In order to accurately measure and regulate the temperature and humidity ofstorage,and improve the quality of warehouse management，design an intelligenttemperature and humidity control systems.In the main control unit，using the MCUSTC89C52．Including sensor、collecting data、implementing data、driven machine、alarming.in temperature measurement unit．the application of DSl8B20sensor。High sensitivity and accuracy,the hard circuit is very easy and can directly connectwith the MCU, sampling．the main control unit dealt with so that the measurementerror in the control within±0.5℃．in humidity measurement unit，the applicationof HS1101or HS1100sensor.In the circuit,it likes a capacity,the volume of it ismuch as the humidity of the air.Add a555timer,it can the square wave that itsfrequency will vary while the humidity vary,through the timer of the MCU,it canmeasure the frequency,so it can calculate the humidity.In implementing agencies,the condition of the system will be displaying. When temperature and humidityexceed the upper and lower limits set by the system,on one hand it will outputs acorresponding control signal through the drive circuit to start exhaust airdehumidification and cooling devices to control the storage temperature andhumidity. On the other hand,the warning light flashes, the buzzer alarms.