Method for judging accuracy of GPS position information

Abstract

The invention provides a method for judging accuracy of GPS position information. The method comprises the steps that a horizontal positioning accuracy parameter EPH and a vertical positioning accuracy parameter EPV of a GPS receiver and the number of visible satellites are recorded; the differential of the horizontal positioning accuracy parameter EPH and the vertical positioning accuracy parameter EPV is obtained; the accuracy of the GPS position information is judged according to the differential change of the EPH / EPV and the setting threshold of the number of current visible satellites. According to the method for judging the accuracy of the GPS position information, the accuracy of unmanned aerial vehicle position information provided by the GPS receiver can be detected rapidly, adverse effects caused to control of unmanned aerial vehicle flying due to the fact that the position information provided by GPS is located in a grey zone are reduced, and the flying safety of an unmanned aerial vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of GPS applications on unmanned aerial vehicles, in particular to a method for judging the accuracy of GPS positioning information. Background technique [0002] Due to its low cost-effectiveness, rapid deployment, and zero casualties, UAVs are widely used in military and civilian fields, and can play an important role in disaster scene monitoring, aerial photography, search and rescue, and infrastructure monitoring. [0003] When UAVs perform tasks in outdoor scenes, they generally use GPS and other devices to assist in positioning, and then plan flight waypoints. This way of working makes the flight of the drone greatly dependent on the accuracy of the positioning information of its onboard GPS receiver. When the aircraft is in a complex flight environment, the GPS receiver on the drone is easily interfered and blocked by electromagnetic, complex climate, and tall buildings, which will cause inaccurate GP...

AI Technical Summary

Problems solved by technology

Since the EPH / EPV value is calculated by the GPS receiver algorithm, there is a delay in the change of EPH / EPV relative to the real situation. If the EPH / EPV is judged according to the preset threshold, it is easy to make the GPS receiver provide the actual value. The positioning information stays in the gray area, which affects the working efficiency of the airborne GPS and even causes flight accidents

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