Patent ID: 11858635
Assignee: INVENTEC CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. An automatic spraying unmanned aerial vehicle (UAV) method based on dynamic adjustment of early warning range, comprising:
receiving an operation path, by an unmanned aerial vehicle;
controlling the unmanned aerial vehicle to perform an automatic spraying operation with a spraying range based on a flight altitude, a flight speed and an operation path;
obtaining an environment video during the automatic spraying operation, and analyzing a forward direction and a forward speed of a staff in the environment video;
when the unmanned aerial vehicle determines that the forward direction is intersected with the spraying range, calculating a relative speed between the forward speed and the flight speed, calculating a preset distance based on the relative speed and an early-warning time, and calculating an early-warning range by extending outwardly from the spraying range by a preset distance;
when the unmanned aerial vehicle determines that a staff appears within an early-warning range in the environment video, pausing the automatic spraying operation and recording the flight path where the unmanned aerial vehicle pauses the automatic spraying operation;
when the unmanned aerial vehicle determines that no staff appears within the early-warning range in the environment video, resuming the automatic spraying operation and stopping recording the flight path of the unmanned aerial vehicle;
transmitting the recorded flight path of the unmanned aerial vehicle to a path server;
generating a second operation path based on position information and the flight path of the unmanned aerial vehicle, and at least one marked range generated with reference to the early-warning range, by the path server;
transmitting the second operation path to the unmanned aerial vehicle, by the path server; and
controlling the unmanned aerial vehicle to perform the automatic spraying operation again based on the flight altitude, the flight speed, and the second operation path.