Research On The Automatic Monitoring System Based On Wireless Sensor Networks For Facility Agriculture Environment

The key functionality of facility agriculture is to effectively regulate the internal environmental conditions of the facilities and to create the optimum environmental conditions for the growth of organism and for keeping fresh of the farm products.Thus,the development of the automatic monitoring system for the facility agriculture environment is of great theoretical significance and application value.The main technique adopted in the existing monitoring system for facility agriculture environment is the wire communication technique,such as the serial-bus technique and the field-bus technique.Such systems possess good interoperability and strong anti-jamming ability. However,their shortages,such as bad stability,low reliability,high cost of installation and maintenance,are also obvious and can not be neglected.These shortages significantly limit the application and popularization of these monitoring systems in the field of facility agriculture.As a new emerging network technique,wireless sensor networks(WSN)possess various merits such as high accuracy,high flexibility,high reliability and low price,and can effectively overcomes deficiencies in the existing monitoring systems.In view of the great advantages of WSN,this thesis focuses on the study of applications of WSN in the field of facility agriculture.The main contributions of the thesis are as follows:1.The background and motivations of the topic studied in this thesis are analyzed,the relevant results on the concerned topic are summarized,and the main content and structure of the thesis are presented.2.The overall structure of the WSN-based automatic monitoring system for facility agriculture environment(WSN-FAEAM)is proposed.The WSN-FAEAM system is composed of WSN,Sink,Backbone Network and User Network.The WSN is constructed by wireless sensor nodes in the way of Ad Hoc.And the Backbone Network refers to the GSM,Internet and satellite network.3.The protocol stack for the WSN-FAEAM system is designed.The designed protocol stack has improved on the IEEE 802.15.4/ZigBee scheme.4.The Sink used in the WSN-FAEAM system is developed.The Sink acts as the Bridge between WSN and Backbone Network.5.The sensor nodes and actuators of the WSN-FAEAM system are developed.The nodes are designed in accordance with the IEEE Std 1451.0^?-2007 and the IEEE Std 1451.5^?-2007 standards.6.The MAC protocol S-MAC⁺and routing protocol MCFA⁺of the WSN-FAEAM system are proposed.Based on the TinyOS operating system,the protocols S-MAC⁺and MCFA⁺are programmed by nesC language.Furthermore,the protocol stack of the WSN-FAEAM is also realized.7.The correction engines of the sensor nodes in the WSN-FAEAM system are established. These correction engines are responsible for the static error compensation of the sensed data.8.The host-computer management software of the WSN-FAEAM system is developed based on the Microsoft Visual C++6.0 and National Instruments LabVIEW 8.6.The host-computer management software is composed of the background management software and the data management software.9.The security framework of the WSN-FAEAM system is defined.The security mechanism and security deployment scheme of the WSN-FAEAM system are also presented.10.The WSN-FAEAM system is developed.The WSN-FAEAM system is able to remotely and automatically monitor the internal environmental conditions of the agricultural facilities in real-time fashion.11.The performance of the WSN-FAEAM system is comprehensively analyzed based on the experiments.It is demonstrated by experiments that the anticipated goals of the WSN-FAEAM system are realized.And the designed system possesses many advantages,such as high accuracy,low energy consumption,low price,strong stability performance and robustness,high flexible to expand and convenient installation.The WSN-FAEAM system can be applied to the real-time remote monitoring the internal environmental conditions of greenhouses,nursery,etc. In the end,the main results of the thesis are summarized,and future research directions are discussed.