Using unmanned aerial vehicles to provide ground control points for aerial survey
First Claim
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1. A method of controlling a fleet of unmanned aerial vehicles (UAVs), comprising:
- controlling a respective propulsion system of each of a first plurality of UAVs in the fleet to fly each of the first plurality of UAVs to, and land at, a different respective ground control point location at a worksite;
receiving a respective pose signal, from one or more pose sensors on each of the first plurality of UAVs, indicative of a slope of terrain at the respective ground control point location;
collecting global navigation satellite system (GNSS) data with a GNSS receiver on each of the first plurality of UAVs, wherein the GNSS data corresponds to the respective ground control point location and is compensated based on the respective pose signal;
controlling each of the first plurality of UAVs to generate a respective ground control point mark corresponding to the respective ground control point location;
controlling movement of each of the first plurality of UAVs so the respective ground control point marks are visible to an aerial imaging vehicle; and
controlling each of a second plurality of UAVs in the fleet to fly over different respective ground control point locations and capture, with an imaging system on each of the second plurality of UAVs, an image of the respective ground control point location including the respective ground control point mark.
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Abstract
An unmanned aerial vehicle (UAV) flies to a location of a ground control point, and provides a mark for imaging by an aerial vehicle. The UAV remains at the ground control point and collects GNSS data to localize the point. The ground control point may be marked on the ground by the UAV, or it may be on an upper surface of the UAV that is visible to the aerial vehicle.
22 Citations
18 Claims
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1. A method of controlling a fleet of unmanned aerial vehicles (UAVs), comprising:
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controlling a respective propulsion system of each of a first plurality of UAVs in the fleet to fly each of the first plurality of UAVs to, and land at, a different respective ground control point location at a worksite; receiving a respective pose signal, from one or more pose sensors on each of the first plurality of UAVs, indicative of a slope of terrain at the respective ground control point location; collecting global navigation satellite system (GNSS) data with a GNSS receiver on each of the first plurality of UAVs, wherein the GNSS data corresponds to the respective ground control point location and is compensated based on the respective pose signal; controlling each of the first plurality of UAVs to generate a respective ground control point mark corresponding to the respective ground control point location; controlling movement of each of the first plurality of UAVs so the respective ground control point marks are visible to an aerial imaging vehicle; and controlling each of a second plurality of UAVs in the fleet to fly over different respective ground control point locations and capture, with an imaging system on each of the second plurality of UAVs, an image of the respective ground control point location including the respective ground control point mark. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An unmanned aerial vehicle (UAV), comprising:
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a propulsion system; a global navigation satellite system (GNSS) receiver comprising a GNSS antenna; one or more pose sensors; a visual mark generator configured to generate a visual ground control point mark; and a control system configured to; receive a ground control point location; control the propulsion system to fly the UAV to a ground control point at the ground control point location at a worksite; receive a GNSS signal from the GNSS receiver; receive a pose signal, from the one or more pose sensors, indicative of a slope of terrain at the ground control point location; generate global navigation satellite system (GNSS) data, corresponding to the ground control point location, based on the GNSS signal and the pose signal; and control the visual mark generator to generate the visual ground control point mark corresponding to the ground control point location. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of establishing a set of ground control points at a worksite, the method comprising:
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flying each of a plurality of different unmanned aerial vehicles (UAVs) to a different respective ground control point in the set of ground control points; controlling movement of each of the plurality of different UAVs to remain at the respective ground control point until an aerial imaging vehicle captures an aerial image that includes the respective UAV at the respective ground control point; and collecting global navigation satellite system (GNSS) data with a GNSS receiver mounted on each of UAVs, wherein the GNSS data collected by each GNSS receiver identifies the respective ground control point corresponding to a respective UAV, of the plurality of different UAVs, on which the GNSS receiver is mounted and is compensated based on a pose signal generated by one or more pose sensors on the respective UAV, the pose signal being indicative of a slope of terrain at the respective ground control point location. - View Dependent Claims (16, 17, 18)
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Specification