Full-automatic traffic fault warning method and system based on unmanned aerial vehicle

The invention discloses a full-automatic traffic fault warning method and system based on an unmanned aerial vehicle. The method comprises the steps that (1) the unmanned aerial vehicle provided with a fault warning board is started and hovers at the position F m behind a fault vehicle; (2) shooting a real-time image of a lane behind the unmanned aerial vehicle through a camera, and carrying out data processing on the image to obtain vehicle position information and lane position information; the speed of the vehicle on the lane where the fault vehicle is located is obtained in real time through a speed measuring radar installed on the unmanned aerial vehicle; (3) comparing the vehicle position information with the lane position information, identifying a vehicle closest to the fault warning board on the lane where the current fault vehicle is located, and calculating a speed recommendation value of the vehicle on the lane where the fault vehicle is located according to the speed corresponding to the vehicle;