Ground correction device for attitude of unmanned aerial vehicle

Abstract

A ground correction device for the attitude of an unmanned aerial vehicle comprises a base, a stand column and a circular marker which are sequentially distributed from bottom to top, the circular marker is provided with a circular contour, and the circular contour is used for shooting of the unmanned aerial vehicle to assist in horizontal attitude correction of the unmanned aerial vehicle. The circular marker comprises a base, a driving part used for driving the base to rotate and a marking part installed on the base, the marking part can rotate along with the base under the action of the driving part, a circular outline for the unmanned aerial vehicle to shoot is formed by the outer edge of the marking part in the rotating process, and the marking part is detachably connected with the base. The occupied space of the ground correcting device is reduced. On the premise of being convenient to carry or transfer, the horizontal posture adjusting precision of the unmanned aerial vehicle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle (UAV) posture correction, in particular to a ground correction device for an UAV posture. Background Art

[0002] Drone aerial remote sensing technology enables three-dimensional observation of surface spatial elements, acquiring a rich variety of geospatial data, and providing crucial first-hand data for scientific research and operational work in fields such as resources and the environment. This has led to rapid advancements in drone hardware and software technology in recent years. Drones, owing to their long range, high-definition image capture, and convenient image transmission capabilities, are increasingly being used in spatial information science and remote sensing image processing. As drones become increasingly powerful, easier to operate, and more affordable, a growing number of people are beginning to recognize their enormous potential across a wide range of industries.

[0003] During drone operations, the drone's posture can be easily unstable due to the influence of the meteorological environment, which can lead to systematic deviations in the image information it collects. Circular markers are widely used in the prior art to assist in correcting the horizontal posture of drones. Circular markers usually have a circular outline for drone photography. After adjusting the circular outline of the circular marker to a horizontal state, when the circular outline in the image taken by the drone is a corresponding circle, it means that the drone's posture is horizontal; when the circular outline in the image taken by the drone is an ellipse, it means that the drone's posture is not horizontal. The actual posture of the drone can then be calculated by measuring the major and minor axes of the ellipse, thereby providing a basis for the amount of horizontal posture adjustment.

[0004] The circular marker in the prior art is usually a circular plate, as disclosed in CN201820540149.2, a ground correction device for drone navigation information. The outer edge of the circular plate constitutes the circular outline. However, for ease of portability or transportation, the circular plate cannot be made too large, resulting in a smaller circular outline in the image taken by the drone (especially noticeable when the drone does not have low-altitude flight conditions). As a result, there is a large systematic error in the process of measuring the lengths of the major and minor axes from the photo, which in turn affects the accuracy of the drone's horizontal attitude adjustment. Utility Model Content

[0005] The utility model aims to provide a ground correction device for the posture of an unmanned aerial vehicle (UAV), which improves the accuracy of the horizontal posture adjustment of the UAV while being easy to carry or transport.

[0006] In order to solve the above technical problems, the specific solution adopted by the utility model is: a ground correction device for the posture of an unmanned aerial vehicle, comprising a base, a column and a circular marker distributed in sequence from bottom to top, the circular marker having a circular outline, and the circular outline is used for the unmanned aerial vehicle to photograph to assist in correcting the horizontal posture of the unmanned aerial vehicle. The circular marker comprises a base, a driving member for driving the base to rotate, and a marking member installed on the base. The marking member can rotate with the base under the action of the driving member, and the outer edge of the marking member forms a circular outline for the unmanned aerial vehicle to photograph during the rotation process, and the marking member is detachably connected to the base to reduce the space occupied by the ground correction device.

[0007] Preferably, the marking member is a thin rod.

[0008] Preferably, the end portion of the marking piece connected to the base is provided with an external thread, and the outer edge of the base is provided with a first screw hole for threaded engagement with the end portion of the marking piece, and the first screw holes are distributed in the horizontal direction.

[0009] Preferably, there are multiple marking members, and the outer edge of the base is correspondingly provided with multiple first screw holes, the multiple first screw holes are evenly spaced along the outer edge of the base, and the depths of the multiple first screw holes are consistent.

[0010] Preferably, the bottom of the base is provided with a second screw hole for threading the end of the marking piece, and the second screw holes are distributed vertically.

[0011] Preferably, a rotating shaft is provided on the end portion of the marking member connected to the base, and the rotating shaft is rotatably connected to the base.

[0012] Preferably, a conical tip is provided on the end of the marking member away from the connection with the base.

[0013] Preferably, the marking piece is a fan-shaped piece.

[0014] Preferably, the base of the marking element is plug-connected or hinged to the base.

[0015] Preferably, the driving member is a motor.

[0016] Beneficial effects

[0017] In the present invention, a driving member is used to drive the marking member to rotate, and the outer edge of the marking member forms a circular contour by the rotation trajectory, so that the marking member can be not circular, but in the form of a slender rod, a fan-shaped piece or other shapes. On this basis, the marking member and the base in the circular marker of the present invention are detachably connected and fixed, so that the floor space of the present invention can be greatly reduced after the marking member is removed, so as to facilitate carrying or transportation. Therefore, compared with the traditional circular plate-type ground correction device, the present invention can have a larger circular contour for drone photography while being easy to carry and transport, so as to reduce system errors and improve the accuracy of drone horizontal attitude adjustment.

[0018] In a preferred embodiment of the present invention, the marker is a thin rod connected to the base via a simple hinged connection, making storage of the marker easier. During use, the base and marker rotate, driven by a driver. Centrifugal force automatically opens the marker to reveal a larger circular outline, eliminating the need for specialized adjustments to the marker, making the process simpler and faster.

[0019] In another preferred embodiment of the present invention, a fan-shaped piece is used as a marking piece. The fan-shaped piece has a narrow base for easy stacking and carrying, and also has a wider outer edge. It can form a clearer circular contour at a lower rotation speed, thereby reducing the rotation speed requirement and power consumption of the driving part and facilitating implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of Example 1 of the present utility model in the state where the sign is stored;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the sign in the open state;

[0022] Figure 3 for Figure 2 Schematic diagram of the top view structure;

[0023] Figure 4 This is a schematic diagram of the main structure of Example 2 of the present utility model in the state where the sign is stored;

[0024] Figure 5 This is a schematic diagram of the top view of the structure of Example 3 of the present utility model when the sign member is in an open state;

[0025] Markings in the figure: 1. circular marker, 101. base, 102. first screw hole, 103. marking member, 104. driving member, 105. second screw hole, 106. U-shaped groove, 107. rotating shaft, 2. column, 3. base. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is described below through three embodiments:

[0027] Example 1

[0028] like Figure 1 and Figure 2As shown, a ground correction device for the attitude of a drone in this embodiment is the same as the existing conventional ground correction device in that it includes a circular marker 1, a column 2 for supporting the circular marker 1, and a support base 3 fixed to the lower end of the column 2. During implementation, after adjusting the circular marker 1 to a horizontal state, the circular marker 1 is photographed by the drone, and the shape of the circular outline of the circular marker 1 in the image is used to determine whether the horizontal attitude of the drone has deviated, and the deviation amount is calculated to make corresponding adjustments. Unlike the existing ground correction device having the outer edge of a circular plate as the circular outline, this embodiment can not only have a larger circular outline to achieve a more accurate calculation of the horizontal attitude deviation, but also significantly reduce its own footprint for easy carrying or transportation. Specifically:

[0029] The circular marker 1 in this embodiment includes a driving member 104 , a base 101 and a marking member 103 .

[0030] The driver 104 is a motor, its housing fixedly mounted within a recessed groove at the top of the column 2. A power source for the driver 104 is located within the column 2, and an operating button for activating the driver 104 is located on the side of the column 2 or on the top edge of the base 3. These power sources and operating buttons are conventional in the art and are not shown in the accompanying drawings. The output shaft of the driver 104 extends vertically upward over the top edge of the column 2 to accommodate the mounting base 101. The base 101 is circular and concentric with the column 2 and base 3 to maintain structural stability. A hole is located at the center of the bottom edge of the base 101 for the driver 104's output shaft to engage and engage.

[0031] The marking member 103 is three thin rods of equal length, one end of the marking member 103 is set to a cone tip, and the other end is provided with an external thread. Correspondingly, three first screw holes 102 are opened on the outer edge of the base 101 for the matching installation of the marking member 103. The first screw holes 102 are distributed in the horizontal direction so that the marking members 103 installed therein are also distributed horizontally. Figure 3 As shown, after the marking members 103 are installed one by one in the first screw holes 102, as the base 101 is driven by the driving member 104 and rotates synchronously, the circular outline captured by the drone is formed by the rotation trajectory of the outer edge of the thin rod, and the conical tip of the outer end of the marking member 103 makes the circular outline clearer.

[0032] In this embodiment, the three first screw holes 102 are evenly spaced along the circumference of the base 101, and the depths of the three first screw holes 102 are the same, so that the marking pieces 103 are radially dispersed, and after the marking pieces 103 are installed in place at the inner ends of the first screw holes 102, the lengths extended from the base 101 are the same, thereby ensuring the rotational stability of the overall structure of the three marking pieces 103 during the rotation of the base 101.

[0033] For easy storage, three second screw holes 105 are provided on the lower edge of the base 101. After the marking piece 103 is unscrewed from the first screw hole 102 and installed one by one to the second screw hole 105, the floor space of this embodiment is significantly reduced, making it easy to carry and transport.

[0034] Example 2

[0035] The difference between this embodiment and embodiment 1 is that the operation of this embodiment is simpler, and the transport and storage states of the marking element 103 can be switched automatically. Specifically:

[0036] like Figure 4 As shown, a U-shaped groove 106 is provided on the outer edge of the base 101 for the mounting of the marking member 103. The end of the marking member 103, away from the tapered tip, is not provided with external threads but is fixed with a rotating shaft 107. Both ends of the rotating shaft 107 pass through the marking member 103 and rotate in conjunction with the shaft holes provided on the two side walls of the U-shaped groove 106.

[0037] Based on the above structure, in the non-working state, the marking member 103 of this embodiment automatically droops due to the action of gravity. Figure 4 As shown, it enters the storage state, which is convenient for carrying and transporting. In order to prevent the marker 103 from shaking, it can be fixed with auxiliary strapping such as a short rope or a cable tie. When it is necessary to open the marker 103 to adjust the attitude of the drone, it is only necessary to remove the strapping, and then start the driving member 104 to drive the marker 103 to rotate, so that the marker 103 can achieve a similar position as in Example 1 under the action of centrifugal force. Figure 3 Shown in the open state.

[0038] Example 3

[0039] like Figure 5 As shown, this embodiment differs from Embodiments 1 and 2 in that a sector-shaped piece is used as the marking element 103, and the narrow base of the sector-shaped piece is connected to the base 101 using the connection method of Embodiments 1 or 2. Because the outer edge of the sector-shaped piece is wider, a clearer circular profile can be formed at a lower rotational speed, thereby reducing the rotational speed requirement and power consumption of the driving element 104, and facilitating implementation.

Claims

1. A ground correction device for an unmanned aerial vehicle (UAV) posture, comprising a base (3), a column (2), and a circular marker (1) arranged in sequence from bottom to top, wherein the circular marker (1) has a circular outline, and the circular outline is used for the UAV to photograph to assist in the horizontal posture correction of the UAV, and is characterized in that: The circular marker (1) comprises a base (101), a driving member (104) for driving the base (101) to rotate, and a marking member (103) mounted on the base (101); the marking member (103) can rotate along with the base (101) under the action of the driving member (104); and the outer edge of the marking member (103) forms a circular outline for drone photography during the rotation process; and the marking member (103) is detachably connected to the base (101) to reduce the space occupied by the ground correction device.

2. The ground-based correction device for an unmanned aerial vehicle (UAV) according to claim 1, characterized in that: The marking member (103) is a thin rod.

3. The ground-based correction device for an unmanned aerial vehicle (UAV) according to claim 2, characterized in that: The end portion of the marking member (103) connected to the base (101) is provided with an external thread, and the outer edge of the base (101) is provided with a first screw hole (102) for screwing the end portion of the marking member (103), and the first screw holes (102) are distributed in the horizontal direction.

4. The ground-based correction device for an unmanned aerial vehicle (UAV) according to claim 3, characterized in that: There are multiple marking members (103), and the outer edge of the base (101) is correspondingly provided with multiple first screw holes (102). The multiple first screw holes (102) are evenly spaced along the outer edge of the base (101), and the depths of the multiple first screw holes (102) are consistent.

5. The ground-based correction device for a drone's posture as claimed in claim 3, characterized in that: The bottom of the base (101) is provided with a second screw hole (105) for threading the end of the marking piece (103), and the second screw holes (105) are distributed in the vertical direction.

6. The ground-based correction device for a drone's posture as claimed in claim 2, characterized in that: A rotating shaft (107) is provided on the end portion of the marking member (103) connected to the base (101), and the rotating shaft (107) is rotatably connected to the base (101).

7. The ground-based correction device for an unmanned aerial vehicle (UAV) according to any one of claims 2 to 6, characterized in that: The marking piece (103) is provided with a cone tip at the end thereof which is away from the end connected with the base (101).

8. The ground-based correction device for an unmanned aerial vehicle (UAV) according to claim 1, characterized in that: The marking piece (103) is a fan-shaped piece.

9. The ground-based correction device for an unmanned aerial vehicle (UAV) according to claim 8, characterized in that: The base of the marking piece (103) is plug-connected or hingedly matched with the base (101).

10. The ground-based correction device for a drone's posture as claimed in claim 1, characterized in that: The driving member (104) is a motor.

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