Design And Implementation Of A System For Real-time Monitoring Rice And Wheat Growth Based On Consumer Unmanned Aerial Vehicle

Nowadays,the world's agriculture is developing into information agriculture,and again informatization has become a research hotspot in the field of agricultural science.There is no doubt that crop growth monitoring is a key issue of agricultural informatization.One of the characteristics of modern crop growth monitoring is the non-destructive monitoring by a non-contact manner.Compared with the crop growth monitoring based on satellite remote sensing,UAV remote sensing has the advantages of less time consumption and higher resolution.Moreover,the emergence of low-cost consumer UAV provides a new opportunity for the application and development of agricultural UAV and brings UAV into the sight of the public.Therefore,this study is expected to software for consumer UAV with crop growth monitoring,and the system will more practical in the application.In this paper,DJI UAV is used as a platform to realize real-time monitoring of rice and wheat growth based on consumer UAV.With this research target,the research will be carried out with the following three aspects.Crop growth monitoring based on dynamic video stream of consumer Unmanned Aerial Vehicle.The real-time monitoring of UAV is different from the monitoring systems based on other platforms.It is not only the change of monitoring platform,but also the change of data source from single image to dynamic video stream,which greatly increases the difficulty and complexity of data processing.By analyzing the characteristics of video stream and summarizing the difficulties in video stream processing,this paper proposes a scheme to analyze the data using video stream codec and OpenGL ES rendering technology.In this paper,the H.264 format of the drone video stream is decoded into the YUV format by using FFmpeg combined with MediaCodec decoding method,and sent to the graphics rendering pipeline in OpenGL ES with the purpose of converting YUV format data to RGB format data.On this basis,a crop growth monitoring model based on visible light was integrated to obtain real-time monitoring results and render the results on the screen in pseudo-color.UAV flight control and path planning module for wheat and rice growth monitoring.It is a necessary part of a complete UAV application.UAV flight control system plays a core role in the whole UAV system.Effective route planning can ensure the successful completion of field tasks.The function of UAV flight route planning is developed with DJI Mobile SDK combined with the Gaode map API to realize the loading of the base map of the aerial survey area,and automatically generate the route in combination with the set flight parameters.This paper studies the operation method of crop growth monitoring,and combines the drone flight control technology to realize the autonomous flight plan of the drone.Design and implementation of a mobile real-time monitoring platform.Based on DJI consumer UAVs and Android mobile terminal devices,this paper designs the application system interacting with the UAV,and this system is implemented with the UAV real-time video stream processing technology,Android mobile platform development technology,DJI SDK,and Gaode Map SDK as the support.It consists of real-time monitoring,route planning,parameter configuration,historical image management and other functions with optimized user interface.The innovative combination of crop growth monitoring,consumer UAVs and mobile platforms provides a new perspective for crop growth monitoring based on UAV,improving the ability of UAVs to be used in crop production.It also significantly reduces the difficulty of applying UAV growth monitoring technology,and makes crop growth monitoring more convenient.