The Application Of Wireless Sensor Network In The Greenhouse Monitoring System

The development of agricultural facilities is theimportant symbol of modernagriculture with significant social meaning. Greenhouse planting is a necessarycomponent of agricultural facilities,as a result, how to improve the level ofinformation of greenhouse planting increasingly attracts scientists’ eyes. As a newmeans of obtaining information and techniques of handling, wireless sensor networkhas been widely used in all kinds of monitoring network owing to its functionincluding moderate price, high reliability, lower power and so on. In this thesis, thetechnique of wireless sensor network will be applied on monitoring greenhouse, and itwill bring significant sense in advancing the development of technique of agriculturalmonitoring.Firstly, we introduce wireless sensor network, IEEE802.15.4and ZigBeeprotocol. We also put forward a design proposal of greenhouse monitoring system ofwireless sensor network on the basis of ZigBee protocol. The design plan usesCC2430as sensor nodes of chip design to realize the perception and collection of allkinds of environmental factors in greenhouse. Then, the collected information will betransmitted to main server by wireless network and realize the functions of datastorage, analysis and inquiry.Next, we study routing protocol of wireless sensor network in greenhouse, anddesign an improved routing protocol (LEACHNEW protocol) based on LEACHprotocol. Also, we demonstrate that the proof protocol can decrease the powerconsumption and prolong exist time in network by simulation.Then, based on the LEACHNEW protocol, we establish adaptive weighted data fusion algorithm, achieving the data fusion between cluster head node and clustermember nodes. By data fusion, we can solve the problem of data redundancy innetwork, improve the precision of data monitoring, decrease the power consumptionand promote the performance in network.Finally, we conclude he whole thesis.