Positioning system and method for unmanned plane

Abstract

The embodiment of the invention relates to a positioning system and method for an unmanned plane. The positioning system at least includes a positioning enhancement apparatus, a fixed station and an unmanned plane, wherein the fixed station can be connected with the unmanned plane; the positioning enhancement apparatus is used for acquiring single point positioning coordinates, and can output reference positioning coordinates according to the single point positioning coordinates; the positioning enhancement apparatus utilizes the reference positioning coordinates and / or the single point positioning coordinates to generate positional deviation information; the unmanned plane is used for acquiring the current positioning coordinates of the unmanned plane, and receiving the current positioning coordinates and the positional deviation information transmitted from the positioning enhancement apparatus; when the current positioning coordinates are the single point positioning coordinates, the positional deviation information is used to correct the single point positioning coordinates; and the corrected single point positioning coordinates are used to control flying of the unmanned plane. The positioning system and method for an unmanned plane can be used for reducing the deviation for positioning of the unmanned plane during the period of executing the same task by the unmanned plane so as to improve the execution accuracy of the task track.

Description

technical field [0001] The invention relates to the technical field of unmanned aerial vehicles, in particular to a positioning system and a positioning method for unmanned aerial vehicles. Background technique [0002] At present, drones can use single-point GPS (Global Positioning System, Global Positioning System) for positioning, but single-point GPS cannot obtain accurate real-time coordinates of drones, and the coordinates obtained for the same position will produce measurement deviations at different times. The errors mainly come from satellite clock errors, ephemeris errors, ionospheric delays, tropospheric delays, and so on. Therefore, the accuracy of the obtained positioning coordinates is too low, making it impossible for the UAV to operate accurately. [0003] In order to improve the accuracy and reliability of positioning, drones can also use differential GPS technology for positioning. The UAV receives the differential message sent by the fixed station. In th...

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Problems solved by technology

[0004] 1. When sending the differential message to the UAV through the digital radio station, due to the limited communication distance of the digital radio station, it cannot cover evenly (the transmitting antenna of the digital radio station has a certain directivity), and is affected by factors such as obstacles. Poor signal places are prone to communication interruptions

[0005] 2. When sending a differential message to the UAV through the mobile communication network, since the UAV usually uses the mobile communication module to communicate wirelessly with the fixed station, communication interruptions are prone to occur in places without mobile communication networks or poor signals. Drone exits differential GPS when communication is lost

When the GPS positioning on the UAV is inaccurate, yaw errors are prone to occur, and accidents are prone to occur in scenarios where the accuracy of route execution is high

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