Research And Application Of Multisensor Data Fusion Technology In The Greenhouse Monitoring System

Greenhouse monitoring and control system has developed rapidly in recent years, due to the greenhouse monitoring area is larger, so we need a large number of sensor nodes constitute a large monitoring network, through a variety of sensors to collect the temperature, humidity and other relevant information to realize automatic monitoring. Data fusion technology is the effective way to solve the problem of redundant data in wireless sensor network, through the integration of multiple information from different sources, according to the data needs of users, removal of redundant information, reduce the amount of data transmission of information, so as to save energy, reduce the network latency and the purpose of reduce the network load.The topics studied in detail the status of data fusion technology. On this basis, we studied data fusion method of greenhouse monitoring system. According to the greenhouse control system integration model, targeted to two data fusion and processing methods. Using adaptive weighted fusion algorithm on the same type of data inside the greenhouse firstly, high precision data obtained at the same time, decrease the data forwarding, using different types of data to grouping integration secondly.About Data fusion algorithm, improved D-S algorithm is presented based on the matrix and verify the correctness of the algorithm. Through simple performance analysis, proved improved D-S have the same fusion precision with the original algorithm, at the same time algorithm can effectively reduce the operation time, reduce the system load, the time of the fusion and the network delay.According to improvements of the theory,.the system arehiteeture and the whole teehnical and function components were presented. Sensor software was simulated for using Labview, and local monitoring platform of greenhouse monitoring system was developed. Combined with improved algorithm, solved the data processing problems of traditional greenhouse monitoring system, effectively improve the data transmission efficiency, improve the data accuracy and reduces the network delay...