Design of Control Circuit for Greenhouse Floriculture Temperature
Abstract: In allusion to the shortcoming of low efficiency of traditional greenhouse floriculture whose temperature is controlled by people. This paper designs a control circuit for greenhouse floriculture temperature. In the system the temperature sensor is applied to collecting the temperature signal which is sent to MCU AT89C51 for processing. The temperature value is displayed on liquid crystal display LCD1602 and it also will be compared with the upper limit value and lower limit value of temperature which can be set. According to the comparative result .the MCU start alarm circuit and heating device and cooling device or not. The MCU is connected with PC through a serial port. On the computer, we can monitor remotely the greenhouse floriculture temperature. This design has been simulated by Proteus. It can be used to detect and control the greenhouse floriculture temperature. This design has the advantages of high efficiency and good flexibility.
Key Words: DS18B20; AT89C51; PC; Temperature measurement and control
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