Design and test of unmanned aerial vehicle video transfer system based on WiFi

Aiming at the phenomenon that traditional unmanned aerial vehicle(UAV) video transmission disturbance-resistant ability is limited, not multiple monitors’ use.A wireless UAV video transfer system based on WiFi network was designed.The system hardware including the framework of the system hardware, embedded development platform Tiny210 which based on the CPU of S5P210 and related peripherals.On the software side, the main note is divided into the Linux embedded operating system programming, and host computer video surveillance software design based on the C#.Using Tiny210 for video data through camera, and then the system gets the data format conversion and compression through the Mjpg-Streamer solution, and computer video monitoring was achieved by listening to the corresponding network port through the wireless network close to the web server.The test results show that the video transfer process, when the resolution is 76 800, the actual frame rate as the theory frame rate increases , after the theory frame rate reach from 10 to 25 fps, the frame rate unchanged and far less than the theoretical.This process increases the system bandwidth, when reached 40 fps peak after falling.When the resolution is greater than 307 200, the actual frame rate does not vary with the theoretical frame rate increases, but remain near constant.Then the camera closes to the operating limit, the system bandwidth keeping from 2 to 3 M every secord, PC screen display is clear and smooth, fully meeting the requirements of video transmission.