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The Intelligent Control System of Greenhouse Cooling in Southeast China

Author: ZhengHuiZhen
Tutor: ZhuHengYin
School: Fujian Agriculture and Forestry University
Course: Agricultural Electrification and Automation
Keywords: Greenhouse cooling Automatic control Temperature and humidity Illumination RS-485 serial communication
CLC: TP273.5
Type: Master's thesis
Year: 2010
Downloads: 75
Quote: 2
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Abstract


In order to solve the southeastern coastal areas of the hot and humid weather caused greenhouse temperature control difficult problems , the subject developed a southeast regional greenhouse cooling STC89C54RD microcontroller as the core control system . The system uses temperature and humidity sensors and light degree sensor real-time monitoring of the greenhouse environment , within the semi-automatic control or automatic control greenhouse -related equipment to regulate greenhouse temperature and humidity , and illumination degrees and other microclimate factors , greenhouse crops provide a suitable growth of environment. Control parameters of the system to a variety of environmental factors control the start and stop greenhouse cooling dehumidification equipment , such as the fan turned on and off , shade nets expand and folding . The system consists of a PC terminal , RS485 industrial bus network and the host controller , the acquisition module of STC89C54RD control module , temperature , humidity and light intensity , the man-machine interface and the drive circuit unit master controller module circuit . The software system uses a multi-mode run independently design ideas can switch with each other , while the introduction of multi-tasking programming ideas to improve the efficiency of the program running . The system uses the primary data collection from the multi- machine communication , remote monitoring , which provides users with a convenient control platform . This subject is a typical application of computer technology , communication technology and computer programming in modern agriculture automation process . Verified by experiment , the control scheme proposed in this paper is the design of the system can run normally .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system > Computer control, computer control system
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