Portable reusable unmanned aerial vehicle surveying and mapping image control point device

Abstract

The utility model relates to the technical field of aerial surveying and mapping, in particular to a portable reusable unmanned aerial vehicle surveying and mapping image control point device. The unmanned aerial vehicle surveying and mapping image control point device is composed of a plurality of identification plates and hinges or elastic pieces, so that the unmanned aerial vehicle surveying and mapping image control point device can be unfolded to form an L-shaped unfolding body with an inner right angle alpha and an outer right angle beta for unmanned aerial vehicle surveying and mapping identification; a folding storage body which is consistent with the identification plate in shape and size can be formed through folding storage; the unmanned aerial vehicle surveying and mapping image control point device can also be composed of a first flexible identification plate and a second flexible identification plate. The unmanned aerial vehicle surveying and mapping image control point device solves the problems of portability and reusability of the image control point device, is simple and convenient to transfer and transport in the field, can form an L shape after being unfolded, and can improve the efficiency of image control point arrangement and unmanned aerial vehicle surveying and mapping identification.

Description

Technical Field

[0001] This utility model relates to the field of UAV surveying technology, specifically to a portable and reusable UAV surveying control point device. Background Technology

[0002] To improve the accuracy of UAV oblique photogrammetry, ground control points (GCPs) are essential. GCPs are the foundation for photogrammetric control, densification, and mapping. The quality of the selection of GCP targets and the accuracy of their positions directly affect the accuracy of the measurement results. Therefore, GCPs must surround the edge of the survey area to control the positional accuracy within that area, correcting for issues such as positional deviations and low coordinate accuracy caused by limited positioning or electromagnetic interference, and correcting for other factors such as excessive altitude differences caused by barometer readings. Only when each GCP is deployed according to certain standards can data be processed more effectively in the office, enabling the 3D model to achieve a certain level of accuracy.

[0003] Currently, ground control points (GCPs) are mainly L-shaped, possessing natural inner and outer right angles, which provide high recognition accuracy in UAV mapping. L-shaped GCPs are primarily of two types: luminous and high-contrast reflective. Reflective GCPs commonly use spray-painted, coated, or target-printed types. However, spray-painted GCPs have a strong odor and pollute the environment; target-printed GCPs are easily moved in the survey area, affecting measurement accuracy; reflective GCPs are difficult to deploy in the field due to inconvenient transfer and transportation, and are easily damaged, affecting the deployment efficiency and quality of UAV mapping. Therefore, there is a growing demand for GCPs that can be folded and stored during transfer or transportation, and unfolded when in use.

[0004] In the prior art, CN210108353U discloses a reusable foldable UAV aerial survey ground marker, whose marker plate is a foldable structure composed of four triangular plates connected by hinges. Although the marker plate is folded using hinges, it can only be folded diagonally, and the folded shape is only half the area of ​​the marker plate. There is still a risk of damage during field transfer or transportation.

[0005] CN220583431 U discloses a ground image control point measurement marker for UAV aerial surveying, including a reel-in box and a fixing structure. This measurement marker can only be used to form "I"-shaped markers.

[0006] CN108548526A discloses a field deployment device for UAV image control point markers. However, the inflatable airbag of this device has a square planar projection after inflation and cannot be folded, making field transport and transportation difficult. Utility Model Content

[0007] This invention provides a portable and reusable UAV mapping control point device, which solves the problems of portability and reusability of control point devices. It is easy to transport and move in the field, and can be unfolded into an "L" shape, which can improve the efficiency of control point deployment and UAV mapping and identification.

[0008] The first technical solution of this utility model is as follows:

[0009] A portable and reusable UAV mapping image control point device is disclosed, wherein the UAV mapping image control point device can be unfolded to form an unfolded body and folded for storage to form a folded storage body; the orthographic projection shape of the unfolded body is "L-shaped" and has an inner right angle α and an outer right angle β for UAV mapping and identification; the orthographic projection shape of the folded storage body is an isosceles right triangle.

[0010] The UAV mapping image control point device includes multiple marker plates, a first hinge, and a second hinge; the orthographic projection shape and size of the marker plate are consistent with the isosceles right triangle.

[0011] Multiple signboards can be spliced ​​together on a plane to form the "L" shape, and adjacent signboards can be arranged symmetrically and spliced ​​together to form a square or a double isosceles right triangle;

[0012] When adjacent signboards are joined together to form a square, the adjacent signboards can be folded together via a first hinge;

[0013] When adjacent signboards are joined to form a double isosceles right triangle, the adjacent signboards can be folded and connected by a second hinge;

[0014] When the UAV mapping image control point device unfolds to form the unfolded body:

[0015] The first hinge unfolds to 180°, while the second hinge folds down to 0°.

[0016] When the UAV mapping image control point device is folded and stored to form the folded storage body:

[0017] The first hinge folds down to 0°, while the second hinge unfolds to 180°.

[0018] In one specific embodiment of this utility model, both the first hinge and the second hinge are butterfly hinges.

[0019] In one specific embodiment of this utility model, the UAV mapping control point device further includes a locking rod and a locking cap;

[0020] Each signboard has two mounting holes for fixing the unfolded body to the ground;

[0021] The two mounting holes are arranged symmetrically about the right-angled center line of the label plate, so that the folding storage body forms two lock holes;

[0022] One end of the locking rod passes through any of the lock holes and is detachably connected to the lock cap.

[0023] In one specific embodiment of this utility model, one end of the locking rod is provided with an external thread, the locking cap is provided with an internal thread, and the locking rod is threadedly connected to the locking cap through the external thread and the internal thread.

[0024] In one specific embodiment of this utility model, the surface of the signboard is coated with a high-contrast color coating.

[0025] In one specific embodiment of this utility model, a handle or shoulder strap is provided on the upper surface of the uppermost label plate of the folding body; or, a handle or shoulder strap is provided on the lower surface of the lowermost label plate of the folding body.

[0026] The second technical solution of this utility model is as follows:

[0027] A portable and reusable UAV mapping image control point device is disclosed, wherein the UAV mapping image control point device can be unfolded to form an unfolded body and folded for storage to form a folded storage body; the orthographic projection shape of the unfolded body is "L-shaped" and has an inner right angle α and an outer right angle β for UAV mapping and identification; the orthographic projection shape of the folded storage body is an isosceles right triangle.

[0028] The UAV mapping image control point device includes multiple marker plates and elastic elements; the orthographic projection shape and size of the marker plate are consistent with the isosceles right triangle.

[0029] Multiple signboards can be spliced ​​together on a plane to form the "L" shape, and adjacent signboards are arranged symmetrically; an installation seam is formed between adjacent signboards;

[0030] The elastic element is disposed within the mounting seam, and the side of the elastic element is fixedly connected to the edge of the adjacent signboard; the elastic element can elastically deform and recover, so that the adjacent signboard can be unfolded to 180° or folded to 0°.

[0031] In one specific embodiment of this utility model, the UAV mapping control point device further includes a locking rod and a locking cap;

[0032] Each signboard has two mounting holes for fixing the unfolded body to the ground;

[0033] The two mounting holes are arranged symmetrically about the right-angled center line of the label plate, so that the folding storage body forms two lock holes;

[0034] One end of the locking rod passes through any of the lock holes and is detachably connected to the lock cap.

[0035] In one specific embodiment of this utility model, one end of the locking rod is provided with an external thread, the locking cap is provided with an internal thread, and the locking rod is threadedly connected to the locking cap through the external thread and the internal thread.

[0036] In one specific embodiment of this utility model, the surface of the signboard is coated with a high-contrast color coating.

[0037] In one specific embodiment of this utility model, a handle or shoulder strap is provided on the upper surface of the uppermost label plate of the folding body; or, a handle or shoulder strap is provided on the lower surface of the lowermost label plate of the folding body.

[0038] The third technical solution of this utility model is as follows:

[0039] A portable and reusable UAV mapping control point device, wherein the orthographic projection shape of the UAV mapping control point device is "L" shaped, and has an inner right angle α and an outer right angle β for UAV mapping and identification;

[0040] The UAV mapping image control point device includes:

[0041] A first flexible signboard that can be rolled into a loop; and,

[0042] A second flexible signboard that can be rolled into a loop, wherein one end of the first flexible signboard is detachably connected to one end of the second flexible signboard, and forms the “L” shape having the inner right angle α and the outer right angle β.

[0043] In one specific embodiment of this utility model, a male Velcro strap and a female Velcro strap are provided between the first flexible marking plate and the second flexible marking plate, and the first flexible marking plate is detachably connected to the second flexible marking plate through the male Velcro strap and the female Velcro strap.

[0044] In one specific embodiment of this utility model, a fixing strap is provided on one end of the first flexible marking plate and the second flexible marking plate that are detachably connected.

[0045] The beneficial effects of this utility model are:

[0046] 1. The portable and reusable UAV mapping control point device of this utility model has multiple marker plates that can be folded and connected by hinges or elastic elements, and adjacent marker plates are arranged symmetrically to form an "L" shape required for UAV mapping and identification. The folding and storage process can fold and stack the marker plates to form a storage folded body with an isosceles triangle cross section, which can realize the recycling and reuse of the control point device, and at the same time improve the portability of the control point device in the field, which is conducive to improving the efficiency of field control point deployment.

[0047] 2. This utility model provides a portable and reusable UAV mapping control point device. The two flexible marking plates can be rolled into a circle, which enables the control point device to be recycled and reused. At the same time, it improves the portability of the control point device in the field and helps to improve the efficiency of field control point deployment.

[0048] 3. The portable and reusable UAV mapping image control point device of this utility model is provided with mounting holes. After the marking plate is unfolded to form an "L" shape, it can be easily fixed to the ground with ground nails to ensure the stability of the shape of the image control point device.

[0049] 4. The portable and reusable UAV mapping image control point device of this utility model has mounting holes on the marking plate. When the marking plate is folded, it can form a lock hole. The shape of the folded storage body can be fixed by the locking rod and the locking cap, which is convenient for transportation. When it needs to be unfolded, the locking rod and the locking cap can also be removed from the lock hole. Attached Figure Description

[0050] Figure 1 A schematic diagram of the unfolded structure of the UAV mapping image control point device provided in Embodiment 1 of this utility model;

[0051] Figure 2 This is a schematic diagram of the structure of the lock rod and lock cap provided in Embodiment 1 of this utility model;

[0052] Figure 3 This is a schematic diagram of the handle of the UAV mapping image control point device after folding and storing, as provided in Embodiment 1 of this utility model.

[0053] Figure 4 This is a schematic diagram of the structure of the folded and stored back strap of the UAV mapping image control point device provided in Embodiment 1 of this utility model.

[0054] Figure 5 This is a schematic diagram of the unfolded structure of the UAV mapping image control point device provided in Embodiment 2 of this utility model;

[0055] Figure 6 This is a schematic diagram of the unfolded structure of the UAV mapping image control point device provided in Embodiment 3 of this utility model.

[0056] Figure 7This is a schematic diagram of the structure of the image control point device of the unmanned surveying device provided in Embodiment 3 of this utility model when it is wound up.

[0057] The attached diagram lists the components represented by each number as follows:

[0058] 1. Signboard; 2. First hinge; 3. Second hinge; 4. Mounting hole; 5. Locking bar; 6. Lock cap; 7. Lock hole; 8. Handle; 9. Shoulder strap; 10. Elastic element; 11. First flexible signboard; 12. Second flexible signboard; 13. Male Velcro; 14. Female Velcro; 15. Fixing strap. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0060] Example 1

[0061] Based on the appendix Figure 1-4 A portable and reusable UAV mapping image control point device is disclosed. The UAV mapping image control point device can be unfolded to form an unfolded body and folded to form a folded storage body. The orthographic projection shape of the unfolded body is "L-shaped" and has an inner right angle α and an outer right angle β for UAV mapping and identification. The orthographic projection shape of the folded storage body is an isosceles right triangle.

[0062] The UAV mapping control point device includes multiple marker plates 1, a first hinge 2, and a second hinge 3; the orthographic projection shape and size of the marker plate 1 are consistent with an isosceles right triangle;

[0063] Multiple signboards 1 can be spliced ​​together on a plane to form an "L" shape, and adjacent signboards 1 can be arranged symmetrically and spliced ​​together to form a square or a double isosceles right triangle;

[0064] When adjacent signboards 1 are joined together to form a square, the adjacent signboards 1 can be folded and connected by the first hinge 2;

[0065] When adjacent signboards 1 are spliced ​​together to form a double isosceles right triangle, the adjacent signboards 1 can be folded and connected by the second hinge 3.

[0066] When the UAV mapping image control point device unfolds to form an unfolded body:

[0067] The first hinge 2 unfolds to 180°, while the second hinge 3 folds down to 0°.

[0068] When the drone mapping image control point device is folded and stored to form a folded storage body:

[0069] The first hinge 2 folds down to 0°, while the second hinge 3 unfolds to 180°.

[0070] Both the first hinge 2 and the second hinge 3 are butterfly hinges.

[0071] The preferred UAV mapping control point device also includes a locking rod 5 and a locking cap 6;

[0072] Each signboard 1 is provided with two mounting holes 4 for fixing the unfolded body to the ground;

[0073] The two mounting holes 4 are arranged symmetrically about the right-angled center line of the label plate 1, so that the folded storage body forms two lock holes 7;

[0074] One end of the locking rod 5 passes through any of the lock holes 7 and is detachably connected to the lock cap 6.

[0075] Preferably, one end of the locking rod 5 is provided with an external thread, and the locking cap 6 is provided with an internal thread. The locking rod 5 is threadedly connected to the locking cap 6 through the external thread and the internal thread.

[0076] In some instances, the signboard 1 may be a plastic sheet with a high-contrast color; preferably, when the signboard 1 is a conventional color, such as transparent, the surface of the signboard 1 is sprayed with a high-contrast color to form a high-contrast color coating.

[0077] High-contrast colors refer to colors that can be identified by drone mapping when contrasted with ambient colors. For example, red can contrast with the green of green plants or with the yellow ground.

[0078] Preferably, a handle 8 or a shoulder strap 9 is provided on the upper surface of the uppermost label plate 1 of the folding body; or, a handle 8 or a shoulder strap 9 is provided on the lower surface of the lowermost label plate 1 of the folding body.

[0079] In this embodiment, the length of the right-angled side of the marking plate 1 is 800mm, so that the "L" shape of the unfolded body has a width of 800mm, making it easy to be surveyed and identified by drones.

[0080] In this embodiment, the number of signboards 1 is typically ≥10, see Appendix. Figure 1 As shown, there are 12 signboards 1, with the two extra signboards 1 located at the two ends of the "L" shape;

[0081] In this embodiment, the bending strength of the signboard 1 is ≥40MPa to ensure that the signboard 1 has sufficient strength after being unfolded, and to ensure the strength of the "L" shape with inner right angle α and outer right angle β.

[0082] The method of using the UAV mapping image control point device in this embodiment is as follows: When performing UAV oblique photogrammetry, unfold the image control point device and place it within the survey area. Use ground stakes through the mounting hole 4 to fix the image control point device. During the survey, use GPS, total station or other measuring instruments to measure the internal angular coordinates of the image control point device. Finally, integrate UAV aerial photography technology and realize UAV aerial surveying, 3D model establishment and other UAV aerial surveying work through the image control point coordinates.

[0083] Example 2

[0084] Based on the appendix Figure 5 A portable and reusable UAV mapping image control point device is disclosed. The UAV mapping image control point device can be unfolded to form an unfolded body and folded to form a folded storage body. The orthographic projection shape of the unfolded body is "L-shaped" and has an inner right angle α and an outer right angle β for UAV mapping and identification. The orthographic projection shape of the folded storage body is an isosceles right triangle.

[0085] The UAV mapping control point device includes multiple marker plates 1 and elastic elements 10; the orthographic projection shape and size of the marker plate 1 are consistent with an isosceles right triangle;

[0086] Multiple signboards 1 can be spliced ​​together on a plane to form an "L" shape, and adjacent signboards 1 are arranged symmetrically; an installation seam is formed between adjacent signboards 1;

[0087] The elastic element 10 is installed in the installation seam, and the side of the elastic element 10 is fixedly connected to the edge of the adjacent sign plate 1; the elastic element 10 can elastically deform and recover, so that the adjacent sign plate 1 can be unfolded to 180° or folded to 0°.

[0088] Preferably, one end of the locking rod 5 is provided with an external thread, and the locking cap 6 is provided with an internal thread. The locking rod 5 is threadedly connected to the locking cap 6 through the external thread and the internal thread.

[0089] In some instances, the signboard 1 may be a plastic sheet with a high-contrast color; preferably, when the signboard 1 is a conventional color, such as transparent, the surface of the signboard 1 is sprayed with a high-contrast color to form a high-contrast color coating.

[0090] High-contrast colors refer to colors that can be identified by drone mapping when contrasted with ambient colors. For example, red can contrast with the green of green plants or with the yellow ground.

[0091] Preferably, a handle 8 or a shoulder strap 9 is provided on the upper surface of the uppermost label plate 1 of the folding body; or, a handle 8 or a shoulder strap 9 is provided on the lower surface of the lowermost label plate 1 of the folding body.

[0092] In this embodiment, the length of the right-angled side of the marking plate 1 is 800mm, so that the "L" shape of the unfolded body has a width of 800mm, making it easy to be surveyed and identified by drones.

[0093] In this embodiment, the number of signboards 1 is typically ≥10, see Appendix. Figure 1 As shown, there are 12 signboards 1, with the two extra signboards 1 located at the two ends of the "L" shape;

[0094] In this embodiment, the bending strength of the signboard 1 is ≥40MPa to ensure that the signboard 1 has sufficient strength after being unfolded, and to ensure the strength of the "L" shape with inner right angle α and outer right angle β.

[0095] In this embodiment, the material of the elastic element 10 can be selected as elastic plastic or flexible cloth, and the elastic material can be elastic rubber; each elastic element 10 is a long strip, and the two sides connected to the marking plate 1 can be elastically bent in the length direction and can be restored; when the marking plate 1 of the UAV mapping image control point device is folded and stored, the elastic element 10 can be bent upward or downward, with an interval between upward and downward bending, so that the marking plate 1 symmetrically arranged with the elastic element 10 can be folded and stacked in sequence to form a folded body with the same effective projection shape as an isosceles right triangle.

[0096] The method of using the UAV mapping image control point device in this embodiment is as follows: When performing UAV oblique photogrammetry, unfold the image control point device and place it within the survey area. Use ground stakes through the mounting hole 4 to fix the image control point device. During the survey, use GPS, total station or other measuring instruments to measure the internal angular coordinates of the image control point device. Finally, integrate UAV aerial photography technology and realize UAV aerial surveying, 3D model establishment and other UAV aerial surveying work through the image control point coordinates.

[0097] Example 3

[0098] Based on the appendix Figure 6-7 A portable and reusable UAV mapping control point device, wherein the orthographic projection shape of the UAV mapping control point device is "L" shaped, and has an inner right angle α and an outer right angle β for UAV mapping identification;

[0099] The UAV mapping control point device includes:

[0100] A first flexible marking plate 11 that can be rolled into a loop; and,

[0101] A second flexible signboard 12 that can be rolled into a loop, one end of the first flexible signboard 11 and one end of the second flexible signboard 12 are detachably connected and form the “L” shape with an inner right angle α and an outer right angle β.

[0102] Preferably, a male Velcro 13 and a female Velcro 14 are provided between the first flexible label plate 11 and the second flexible label plate 12, and the first flexible label plate 11 is detachably connected to the second flexible label plate 12 through the male Velcro 13 and the female Velcro 14.

[0103] Specifically, a male Velcro 13 is provided on the upper side of one end of the first flexible signboard 11, and a female Velcro 14 is provided on the lower side of one end of the second flexible signboard 12. One end of the second flexible signboard 12 is placed on the male Velcro 13 of the first flexible signboard 11, so that the second flexible signboard 12 and the first flexible signboard 12 form an "L" shape with an inner right angle α and an outer right angle β.

[0104] Preferably, a fixing strap 15 is provided on one end of the first flexible signboard 11 and the second flexible signboard 12 that are detachably connected, for fixing the wound first flexible signboard 11 and the second flexible signboard 12; both the first flexible signboard 11 and the second flexible signboard 12 are provided with mounting holes 4, which are used to cooperate with ground nails to fix the unfolded first flexible signboard 11 and the second flexible signboard 12 flat to the ground.

[0105] The first flexible marking plate 11 and the second flexible marking plate 12 can be made of PET.

[0106] In some instances, the first flexible signboard 11 and the second flexible signboard 12 may have the same or different lengths; in this embodiment, the shape and size of the first flexible signboard 11 are the same as those of the second flexible signboard 12, with a width requirement of 200-400mm and a length requirement of 3-7 times the width.

[0107] In some instances, the first flexible signboard 11 and the second flexible signboard 12 may be selected to have high-contrast colors, or the surfaces of the first flexible signboard 11 and the second flexible signboard 12 may be coated with a high-contrast color coating, or the surfaces of the first flexible signboard 11 and the second flexible signboard 12 may be covered with a fabric layer dyed with high-contrast colors; in this embodiment, the first flexible signboard 11 and the second flexible signboard 12 have high-contrast colors.

[0108] In this embodiment, the first flexible marking plate 11 and the second flexible marking plate 12 have elastic recovery capabilities and can be unfolded to form a plane after being unfolded.

[0109] The method of using the UAV mapping image control point device in this embodiment is as follows: When performing UAV oblique photogrammetry, unfold the image control point device and place it within the survey area. Use ground stakes through the mounting hole 4 to fix the image control point device. During the survey, use GPS, total station or other measuring instruments to measure the internal angular coordinates of the image control point device. Finally, integrate UAV aerial photography technology and realize UAV aerial surveying, 3D model establishment and other UAV aerial surveying work through the image control point coordinates.

[0110] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable reusable unmanned aerial vehicle mapping ground control point device, characterized by, The unmanned aerial vehicle surveying and mapping image control point device can be unfolded to form an unfolded body and can be folded to form a folded body; the orthographic projection shape of the unfolded body is an "L" shape, and has an inner right angle α and an outer right angle β for unmanned aerial vehicle surveying and mapping identification; the orthographic projection shape of the folded body is an isosceles right triangle; The unmanned aerial vehicle surveying and mapping image control point device comprises a plurality of identification plates, a first hinge and a second hinge; the orthographic projection shape and size of the identification plate are consistent with the isosceles right triangle; A plurality of the identification plates can be spliced to form the "L" shape on a plane, and adjacent identification plates are symmetrically arranged and can be spliced into a square or a double isosceles right triangle; When the adjacent identification plates are spliced into a square, the adjacent identification plates are foldably connected through the first hinge; When the adjacent identification plates are spliced into the double isosceles right triangle, the adjacent identification plates are foldably connected through the second hinge; When the unmanned aerial vehicle surveying and mapping image control point device is unfolded to form the unfolded body: The first hinge is unfolded to 180°, and the second hinge is folded to 0°; When the unmanned aerial vehicle surveying and mapping image control point device is folded to form the folded body: The first hinge is folded to 0°, and the second hinge is unfolded to 180°.

2. The portable reusable unmanned aerial vehicle photogrammetry ground control point device of claim 1, wherein: The first hinge and the second hinge are both butterfly hinges.

3. A portable reusable unmanned aerial vehicle mapping ground control point device, characterized in that, The unmanned aerial vehicle surveying and mapping image control point device can be unfolded to form an unfolded body and can be folded to form a folded body; the orthographic projection shape of the unfolded body is an "L" shape, and has an inner right angle α and an outer right angle β for unmanned aerial vehicle surveying and mapping identification; the orthographic projection shape of the folded body is an isosceles right triangle; The unmanned aerial vehicle surveying and mapping image control point device comprises a plurality of identification plates and elastic members; the orthographic projection shape and size of the identification plate are consistent with the isosceles right triangle; A plurality of the identification plates can be spliced to form the "L" shape on a plane, and adjacent identification plates are symmetrically arranged; a mounting seam is formed between adjacent identification plates; The elastic members are arranged in the mounting seam, and the side surfaces of the elastic members are fixedly connected with the edges of adjacent identification plates; the elastic members can be elastically deformed and restored, so that adjacent identification plates can be unfolded to 180° or folded to 0°.

4. The portable reusable unmanned aerial vehicle photogrammetry ground control point device of claim 1 or 3, wherein: The unmanned aerial vehicle surveying and mapping image control point device further comprises a lock rod and a lock cap; Each identification plate is provided with two mounting holes for fixing the unfolded body to the ground; The two mounting holes are symmetrically arranged about the right angle midline of the identification plate, so that the folded body forms two lock holes; One end of the lock rod penetrates through any of the lock holes and is detachably connected with the lock cap.

5. The portable reusable unmanned aerial photogrammetry ground control point device of claim 4, wherein: One end of the lock rod is provided with external threads, and the lock cap is provided with internal threads; the lock rod is threadedly connected with the lock cap through the external threads and the internal threads.

6. The portable reusable unmanned aerial vehicle photogrammetry ground control point device of claim 1 or 3, wherein: The surface of the identification plate is sprayed with a high-contrast color coating.

7. The portable reusable unmanned aerial mapping ground control point device of claim 1 or 3, wherein: The upper surface of the uppermost identification plate of the folded body is provided with a handle or a shoulder strap; or, the lower surface of the lowermost identification plate of the folded body is provided with a handle or a shoulder strap.

8. A portable reusable unmanned aerial vehicle mapping ground control point device, comprising: The orthographic projection shape of the unmanned aerial vehicle surveying and mapping image control point device is an "L" shape, and has an inner right angle α and an outer right angle β for unmanned aerial vehicle surveying and mapping identification; The unmanned aerial vehicle surveying and mapping image control point device comprises: a first flexible identification plate which can be wound into a circle; and a second flexible identification plate which can be wound into a circle, one end of the first flexible identification plate being detachably connected with one end of the second flexible identification plate to form the "L" shape with the inner right angle α and the outer right angle β.

9. The portable reusable unmanned aerial photogrammetry ground control point device of claim 8, wherein: Magic male and female stickers are arranged between the first flexible identification plate and the second flexible identification plate, and the first flexible identification plate is detachably connected with the second flexible identification plate through the magic male and female stickers.

10. The portable reusable unmanned aerial photogrammetry ground control point device of claim 8, wherein: Fixing belts are arranged on the ends of the first flexible identification plate and the second flexible identification plate which are detachably connected, and the first flexible identification plate and the second flexible identification plate are both provided with mounting holes.

Images