Research On Application Of Heterogeneous Wireless Network Technology For Intelligent Agriculture

Intelligent agriculture is an advanced stage of agricultural production.Through modern control theory and wireless communication technology,human realizes intelligent management of agricultural planting.At Current stage of social development,it has lbeen applied to provide extremely technical support for intelligent agriculture that the rapid development of Internet of Things,Big Data,and Cloud Computing.Meanwhile,some wireless networks,like Bluetooth,ZigBee,Wi-Fi and others,have been widely used in the field of intelligent agriculture.Although the above three wireless networks all work in the 2.4 GHz band,there are their own advantages among wireless networks which have different architectures:the Bluetooth network has the lowest power consumption,while the ZigBee network has the longest transmission distance,and the Wi-Fi network has the fastest transmission rate.How to integrate these heterogeneous wireless network technologies efficiently is one of the hot issues in recent years.In this paper,what is deeply researched is the protocol stack architecture of three heterogeneous wireless networks:Bluetooth,ZigBee and Wi-Fi.On the basis of study,there are application which are based on real-time operating system are programmed and a heterogeneous wireless network system hardware platform for intelligent agriculture is built.It has realized the stable transmission of agricultural production data and provides data support for the growth control of crops.There are monitoring nodes,heterogeneous wireless gateways and monitoring terminals which are included in the agricultural intelligent greenhouse monitoring system hardware platform.The bottom monitoring node plays the role of collecting the environmental parameters of agricultural greenhouse growth,controlling the production equipment inside the agricultural greenhouse,and uploading information such as environmental parameters and equipment status to the heterogeneous wireless gateway for analysis and processing.The heterogeneous wireless gateway establishes the communication connection between the monitoring node and the monitoring terminal,the monitoring node and the PC,and realizes convenient switching of different networks and stable transmission of communication data.At the same time,the heterogeneous wireless gateway embeds the decoupling control algorithm to realize the decoupling control of the ambient temperature and humidity even when the connection to the PC is disconnected.The monitoring terminal is used for receiving the upload data of the gateway,real-time display of environmental parameters,remotes control the monitoring node,real-time curve drawing and system parameter configuration.In addition,it also has effect on realizing automatic or manual control of the agricultural greenhouse,adjusting the growth environment of the crops,and realizing the target of crop growth control.There are multiple intelligent greenhouses that have successfully applied the heterogeneous wireless network system platform to realize remote data collection and automatic control of intelligent greenhouses by the efficient integration of three wireless networks:Bluetooth,ZigBee and Wi-Fi.