| For the construction of intelligent agriculture,this dissertation combines network communication technology,sensor technology,embedded microprocessor technology,computer internet of things technology and cloud platform technology to design and develop a greenhouse control system based on M2 M communication.This designed system provides a systematic solution for the intelligent,centralized and energy-saving construction of greenhouses.The following is the main work of this dissertation:(1)This dissertation summarizes the research status and development trend of M2 M technology and greenhouse control system in China and abroad.According to the functional requirements of greenhouse control system,the dissertation gives the design scheme of greenhouse control system based on M2 M communication.The system architecture of data acquisition layer,environmental regulation layer and resource management layer was designed in the scheme,and their feasibility analysis was carried out at the same time.(2)This dissertation proposes an energy-saving optimization algorithm for M2 M uplink based on QoS guarantee.This algorithm can be applied to the real-time transmission of sensor data in the data acquisition layer.Moreover,when the scale of the device is large,the performance of this algorithm is better,and it can optimize the energy efficiency of the system and reduce the data packet loss rate.(3)This dissertation designs and develops the data acquisition layer of the greenhouse control system.The data acquisition layer of is based on the STM32 microprocessor and integrates the power module and various environmental parameter sensor modules.The collected environmental parameter information is communicated through NB-IOT communication module,and then transmitted to the server through the base station.(4)This dissertation designs and develops the environmental regulation layer of the greenhouse control system.The environmental regulation layer can control greenhouse agricultural equipment such as water curtains,sunshades,fans and so on according to the environmental parameter information of the data acquisition layer.It can also control the greenhouse agricultural equipment intelligently according to the control strategy.(5)This dissertation designs and develops the resource management of the greenhouse control system.The resource management layer mainly includes the cloud server,which can store,process and analyze the massive greenhouse information.It can also achieve the centralized management and control of agricultural greenhouse control systems through intelligent management strategies.According to the design requirements of agricultural greenhouse control,the system designed in this dissertation was successfully applied in the greenhouse of Boda orchid planting base in Hainan.Tests show that the system designed in this dissertation can achieve the desired objectives.This system can accurately collect the environmental parameters of crop growth in greenhouse,intelligently control the regulating equipment in greenhouse and remotely control and manage greenhouse through smart mobile phone.It also can store and analyze various relevant data in the process of greenhouse plant cultivation.This system runs stably and operates conveniently.It can meet the design requirements of the greenhouse control system and realize the intellectualization of the agricultural greenhouse control system. |
