The Research Of Greenhouse Monitor System Based On Virtual Instrument

Aiming at the sub-item "Greenhouse monitor system based on Virtual Instrument" of the Agriculture Ministry 948 item(2003 — Z59) "Greenhouse information obtaining and intelligent accurate fertilization control system", the research work is to design a greenhouse monitor system in order to provide the plants an appropriate environment.The sub-machine is designed with SCM system in order to collect and save the greenhouse information and communicate upper-machine by RS232 interface. The upper-machine is programmed by Lab VIEW, including six modules and a patch program. This software can indicate the state of each sub-machine, and save, delete, print and display in graphs and tables of the user-specified data collected by sub-machines. User can clearly know the information changes of greenhouse in a specified period.A datafusion method is proposed in this paper. Firstly, the extraction method is applied to eliminate the careless mistakes in the collected data. Secondly, the general datafusion method based on arithmetical mean and group estimation is applied on the rest data. Finally, the intelligence weighted model is established in order to obtain the final datafusion data. By using this datafusion method, the more accurate information of greenhouse is obtained, and the more accurate data is provided to the monitor-control system.This system can manage greenhouse information intelligent and has been applied in some greenhouses as a new product.