Improvement Of Greenhouse Intelligent Irrigation System Based On ZigBee

The intelligent greenhouse irrigation system designed by the research team from northwest A&F university has the advantages of high reliability,low cost and simple maintenance,it has solved several problems,such as the complexity of distributing wires,unvaried method of collecting the climate parameters as well as high cost,and the system can meet the requirements of wireless and intelligent management of the interior environment of the facility.Thus,this system is of practical values.However,the system is not perfect which has several other problems and shortcomings,such as short transmission of the wireless communication module,high energy consumption of nodes and single monitoring method.Therefore,in this thesis,the improvement which aims to improve the performance and perfect its functionality for smart greenhouse irrigation system is presented.The main work of the thesis includes:(1)Analyze the shortcomings of the original system and provide requirements for solving the shortcomings.Use modular design method.The overall scheme as well as the hardware and software division strategy for improvement are planned.In addition,the improved design schemes for node hardware and software and the design scheme for host computer software are provided.(2)Complete the system hardware design.Firstly,the wireless communication module is selected;the CC2530 + 2591 chip with higher transmission power and receiver sensitivity is used to replace the CC2530 module of the original system to extend the communication distance between the system nodes.Secondly,for data acquisition node hardware design,the low-power consumption strategy which isolates the unused circuit and reduces the running energy consumption is added.Thirdly,the irrigation control function and routing functions are designed into a single node to reduce the system development costs and application costs.Lastly,the design of the standby power supply system to enhance the adaptability of the system which can be used in area lacking electrical power is included.(3)Complete the system software design.Considering the requirement for improvement and hardware design,the routing node application with irrigation control function isdeveloped.In addition,the low-power-consumption and energy-saving design for acquisition node software is realized.Moreover,the network topology mapping function and WeChat remote control function of the host computer monitoring software are designed and implemented,improving the functionality of the system.(4)Perform system testing which include comparison test and functional test.The comparison test mainly tests the wireless communication distance of the node and the energy consumption of the node.The functional test mainly tests the corresponding function of the host computer software.The test results show that the improved communication system can reach a distance of 120 meters in the simulated field environment.The acquisition node can theoretically run 172 days when using 3000 mAh battery for power supply.The host computer can display the change of the network status in real time and users can perform the remote monitoring operation to the greenhouse through WeChat Official Accounts.Thus,the system has achieved the expected improvement requirement.