Research On Intelligent Control Techniques Of Greenhouse Environment

With the development of digital agriculture techniques,intelligent greenhouse has been used in our country.The cultivation and management of greenhouse crops have also begun to emphasize on energy conservation and sustainable development.Through the current situation of greenhouse control,as well as hardware and software technology,this thesis proposes an idea of combining intelligent control technology,wireless communication technology and Android technology to build intelligent greenhouse control system,realizes a combined system of the intelligent control of greenhouse and greenhouse data acquisition and transmission based on ZigBee network technology,Web technology and Android technology.Meanwhile,this thesis focuses on the analysis of the feasibility and practicability of energy-balanced coverage control algorithm and sensor deployment in the actual greenhouse environment.Main work and study of this thesis are as follows:1.This thesis proposes a node coverage algorithm based on energy balance,with a starting point of energy balance,studies the way to rationally deploy sensor nodes in randomly deployed Wireless Sensor Networks,and achieve balanced energy consumption of the whole network on the premise of guaranteeing the network coverage rate,in order to prolong the network life cycle.2.Energy consumption balanced coverage control algorithm is used in ZigBee network,to realize rational layout of sensors in greenhouse,reduce the number of sensors,and save the cost and energy consumption.3.Designs the whole structure and software function modules of the greenhouse intelligent control system,analyzes and designs each functional module in detail,and draws corresponding figures,designs the database according to the E-R diagram.Greenhouse intelligent control system collects data by using air temperature,soil moisture,CO2 concentration,light intensity and other sensors,the final data realizes Internet data interaction through ZigBee network combined by perception nodes,routing nodes and Sink nodes as well as GPRS network.Internet users real-time view the data in the greenhouse,grasp the growth status of crops through the Web terminal and mobile terminal system based on Android.Besides,Internet users can control greenhouse equipment such as ventilators,shutters,irrigators etc.according to environment parameters of greenhouse through manual or intelligent control mode.The system test shows that the intelligent control system of greenhouse environment designed in this thesis can achieve the corresponding function in the web and mobile terminals,and meet the practical requirements.