A ground target for aerial photogrammetry using unmanned aerial vehicles

Abstract

This invention belongs to the field of UAV mapping target technology, and particularly relates to a UAV aerial photogrammetry ground target, including a base. A frame is mounted on the base via a support mechanism. A central shaft runs through the frame in the front-to-back direction. A display screen and a solar panel are mounted on the central shaft via a right-angle mounting bracket. A conversion mechanism is provided within the frame, which drives the central shaft to rotate, controlling the rotation of the right-angle mounting bracket and switching the positions of the display screen and solar panel. The advantages are: this invention can effectively perform UAV mapping target work in natural environments for extended periods, has self-powered and self-cleaning functions, and features a long service life and strong environmental adaptability.

Description

Technical Field

[0001] This invention relates to the field of UAV mapping target technology, and more particularly to a UAV aerial photogrammetry ground target. Background Technology

[0002] Ground targets are used in UAV aerial photogrammetry to improve the accuracy and efficiency of image processing, especially in fields such as surveying, photogrammetry, and 3D modeling. Ground targets usually have high-contrast patterns or colors, which facilitates the identification and positioning of UAV cameras.

[0003] In existing technologies, ground targets are highly susceptible to the effects of lighting conditions and environmental factors. Therefore, the method of displaying target patterns on electronic displays has been gradually adopted. However, since photogrammetry work cannot be completed in a short period of time, ground targets usually need to remain in a designated position for a long time. During this period, dust and dirt can easily adhere to the target display screen, thus affecting the later display effect of the target. In addition, the display screen needs to be continuously powered, and the method of connecting and pulling power cords is dangerous and easily affected by environmental factors.

[0004] To address the aforementioned issues, we propose a ground target for aerial photogrammetry using unmanned aerial vehicles (UAVs). Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the background art by proposing a ground target for aerial photogrammetry using a drone.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a ground target for aerial photography and surveying by unmanned aerial vehicles, including a base, a frame mounted on the base by a support mechanism, a central shaft running through the frame in the front-to-back direction, a display screen and a solar panel mounted on the central shaft by a right-angle mounting bracket, and a conversion mechanism provided inside the frame, which can drive the central shaft to rotate, control the rotation of the right-angle mounting bracket, and switch the positions of the display screen and the solar panel.

[0007] A base plate is fixedly sleeved on the outer end of the upright frame, and a processing frame is fixedly connected to the upper end of the base plate. The right-angle mounting bracket is located inside the processing frame and has cleaning mechanisms on both sides. The cleaning mechanism includes a moving component, and a scraper assembly is provided on the side of the moving component near the right-angle mounting bracket. A scraper processing mechanism is provided on the central shaft. The scraper processing mechanism can clean and wet the scraper assemblies on the two cleaning mechanisms. A water supply mechanism is provided at the lower end of the base plate.

[0008] In the above-mentioned UAV aerial photogrammetry ground target, the support mechanism includes a support column fixedly connected to the base, a lower end plate fixedly connected to the support column, a jack fixedly installed on the lower end plate, an upper end plate fixedly connected to the telescopic end of the jack, and the upright frame fixed on the upper end plate.

[0009] In the above-mentioned UAV aerial photogrammetry ground target, the right-angle mounting frame consists of a right-angle plate and two connecting rods. The display screen and the solar panel are respectively fixedly mounted on the two outer end faces of the right-angle plate. The two ends of the two connecting rods are respectively fixed to the inner side of the right-angle plate, and their center positions are fixed to the central axis rod.

[0010] In the above-mentioned UAV aerial photogrammetry ground target, the conversion mechanism includes a drive rod rotatably connected in the upright frame, a first bevel gear fixedly sleeved on the upper end of the drive rod, a second bevel gear vertically meshing on the first bevel gear, the second bevel gear fixedly sleeved on the central shaft, and a first motor for driving the drive rod to rotate fixedly installed on the lower end plate.

[0011] In the above-mentioned UAV aerial photogrammetry ground target, the moving component includes a sliding rod and a threaded rod distributed parallel to each other. The sliding rod is fixedly connected to the front and rear inner walls of the processing frame, and the threaded rod is rotatably connected to the front and rear inner walls of the processing frame. Moving blocks are sleeved on both the sliding rod and the threaded rod. A vertical rod is fixedly connected between two corresponding moving blocks. A second motor that drives the threaded rod to rotate is fixedly installed at the front end of the processing frame.

[0012] The scraper assembly includes two clamping plates spaced apart front to back, with a cleaning sponge fixedly connected between the two clamping plates. Spring plates are fixedly connected between the two clamping plates and two movable sleeves located on the same side. The upper and lower ends of each clamping plate are beveled.

[0013] In the aforementioned UAV aerial photogrammetry ground target, the scraper processing mechanism includes a hollow sleeve fixedly sleeved on the central shaft and located behind the right-angle mounting bracket. Two processing rods are uniformly fixedly connected to the outer circumference of the hollow sleeve. The two processing rods are arranged parallel to the connecting rod and each end is provided with a squeezing port. The width of the squeezing port is less than the maximum width of the scraper assembly. A nozzle is provided on the inner wall of the squeezing port. An internal tube connecting the nozzle and the hollow sleeve is provided inside the processing rod.

[0014] In the aforementioned UAV aerial photogrammetry ground target, the water supply mechanism includes a water tank, a gear pump, an accumulator, and two push-to-shut-off valves fixedly connected to the lower end of the base plate. The water tank and the inlet of the gear pump are connected by a first connecting pipe, and the outlet of the gear pump and the inlet of the accumulator are connected by a second connecting pipe. A one-way valve is installed on the second connecting pipe. The outlet of the accumulator and the push-to-shut-off valve on the right are connected by a third connecting pipe, and the two push-to-shut-off valves are connected by a fourth connecting pipe. The push-to-shut-off valve on the left is connected to a water supply pipe, and the push-to-shut-off valve on the left is fixedly connected to a push-to-shut-off block. Both push-to-shut-off valves extend above the base plate.

[0015] In the above-mentioned UAV aerial photogrammetry ground target, the drive end of the gear pump is fixedly fitted with two first sprockets, and each of the two threaded rods is fitted with a one-way bearing. The inner rings of the two one-way bearings are fixedly connected to the corresponding threaded rods, and the outer rings of the two one-way bearings are fixedly fitted with second sprockets. A chain is fitted on the first sprockets and the second sprockets located on the same plane.

[0016] In the above-mentioned UAV aerial photogrammetry ground target, a water receiving hopper is fixedly connected to the left side wall of the processing frame, and a water supply pipe is connected between the lower end of the water receiving hopper and the water tank.

[0017] In the above-mentioned UAV aerial photogrammetry ground target, the base plate is provided with a sewage outlet and a drainage hole, the upper end of the base is fixedly connected to a battery box, the battery box is installed with a storage battery, and the upper end of the processing frame is fixedly connected to an inwardly snap-on protective frame.

[0018] Compared with existing technologies, the advantages of this invention are:

[0019] By incorporating a right-angle mounting bracket, display screen, solar panel, and conversion mechanism, the local ground target can switch between two states: working and charging / sleep. In working mode, the display screen shows the target pattern, facilitating easy pattern switching. It offers higher clarity and contrast, unaffected by low light conditions, making it easier and clearer for drones to identify and locate targets during surveying. In charging / sleep mode, the solar panel generates and stores electrical energy, ensuring the display screen remains operational for extended periods. This allows the local ground target to remain in one location for extended periods without requiring an external power supply, demonstrating strong environmental adaptability.

[0020] By setting up two cleaning mechanisms, the display screen and solar panel can be rotated sequentially to the corresponding cleaning mechanism through the switching mechanism, thereby automatically performing surface cleaning work. This ensures that the display screen surface is clean every time it is in operation, so as not to affect the target display effect and ensure the effective operation of UAV surveying. The solar panel surface is clean every time it enters charging sleep mode, so as to effectively perform power generation and storage.

[0021] By setting up a scraper processing mechanism and a water supply mechanism, before the cleaning work begins, the conversion mechanism drives the display screen and solar panel to rotate, and the two processing rods rotate accordingly, squeezing the corresponding scraper components. During the process, the water supply mechanism continuously supplies water, and both nozzles spray cleaning water towards the corresponding cleaning sponges, wetting the cleaning sponges that are about to be cleaned, keeping them moist before the cleaning work begins, and maintaining a good state for adsorbing dirt. The cleaning sponges that have already been cleaned are then washed. The automated wetting and cleaning of the cleaning sponges ensures the long-term effectiveness of the cleaning work.

[0022] In summary, this invention can effectively perform target mapping work for UAVs in natural environments for extended periods. It features self-powered and self-cleaning capabilities, a long service life, and strong environmental adaptability. Attached Figure Description

[0023] Figure 1 This is a three-dimensional view of a ground target for aerial photogrammetry using an unmanned aerial vehicle (UAV) according to the present invention.

[0024] Figure 2 This is a three-dimensional image of a ground target from another perspective, as proposed in this invention, for aerial photogrammetry using a UAV.

[0025] Figure 3 This is a partial perspective view of a ground target for aerial photogrammetry using an unmanned aerial vehicle (UAV) according to the present invention.

[0026] Figure 4 This is a perspective view of a conversion mechanism in a ground target for aerial photogrammetry using an unmanned aerial vehicle (UAV) according to the present invention.

[0027] Figure 5 This is a perspective view of a cleaning mechanism for a ground target in aerial photogrammetry using an unmanned aerial vehicle (UAV) according to the present invention.

[0028] Figure 6 This is a perspective view of a scraper assembly in a ground target for aerial photogrammetry using an unmanned aerial vehicle (UAV) according to the present invention.

[0029] Figure 7 This is a perspective view of a scraper processing mechanism in a ground target for aerial photogrammetry using an unmanned aerial vehicle (UAV) according to the present invention.

[0030] Figure 8 This is a three-dimensional view of a water supply mechanism in a ground target for aerial photogrammetry using an unmanned aerial vehicle (UAV) according to the present invention.

[0031] In the diagram: 1. Base, 2. Support column, 3. Jack, 4. Vertical frame, 5. Central shaft, 6. Right angle plate, 7. Connecting rod, 8. Display screen, 9. Solar panel, 10. First motor, 11. Drive rod, 12. First bevel gear, 13. Second bevel gear, 14. Base plate, 15. Processing frame, 16. Slide rod, 17. Threaded rod, 18. Second motor, 19. Moving sleeve block, 20. Vertical rod, 21. Clamping plate, 22. Cleaning sponge, 23. Spring plate, 24. Hollow sleeve, 25. Processing rod, 26. Extrusion port, 27. Nozzle, 28. Internal pipe, 29. Water tank, 30. Gear pump, 31. Accumulator, 32. Press shut-off valve, 33. First connecting pipe, 34. Second connecting pipe, 35. Third connecting pipe, 36. Fourth connecting pipe, 37. Water supply pipe, 38. Pressing block, 39. Chain, 40. Water receiving hopper, 41. Water replenishment pipe, 42. Sewage outlet, 43. Drain hole, 44. Battery box, 45. Battery, 46. Protective frame. Detailed Implementation

[0032] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] Reference Figures 1-8 A ground target for aerial photogrammetry using an unmanned aerial vehicle (UAV) includes a base 1, on which a vertical frame 4 is mounted via a support mechanism. The support mechanism includes a support column 2 fixedly connected to the base 1, a lower end plate fixedly connected to the support column 2, a jack 3 fixedly mounted on the lower end plate, and an upper end plate fixedly connected to the telescopic end of the jack 3. The vertical frame 4 is fixed to the upper end plate. The jack 3 provides support and facilitates height adjustment during the installation of the ground target.

[0034] A central shaft 5 runs through the front and rear of the frame 4, rotatably connecting it to the frame 4. A display screen 8 and a solar panel 9 are mounted on the central shaft 5 via a right-angle mounting bracket. The right-angle mounting bracket consists of a right-angle plate 6 and two connecting rods 7. The display screen 8 and solar panel 9 are fixedly mounted on the two outer end faces of the right-angle plate 6, perpendicular to each other. The two connecting rods 7 are fixed at both ends to the inner sides of the right-angle plate 6, and their center is fixed to the central shaft 5. The right-angle mounting bracket can rotate around the central shaft 5. The connecting rods 7 and the right-angle plate 6 form an isosceles right triangle, providing high stability. The display screen 8 displays an electronic target pattern, facilitating pattern changes and offering higher sharpness and contrast, unaffected by dim lighting.

[0035] A battery box 44 is fixedly connected to the upper end of the base 1. A storage battery 45 is installed inside the battery box 44. The solar panel 9 can convert solar energy into electrical energy through the photoelectric effect, which is an existing technology. When used with the storage battery 45, the electrical energy can be effectively stored through the inverter, thereby supplying power to various electrical components.

[0036] Reference Figures 3-4 The frame 4 is equipped with a conversion mechanism, which includes a drive rod 11 rotatably connected to the frame 4. A first bevel gear 12 is fixedly sleeved on the upper end of the drive rod 11. A second bevel gear 13 is vertically meshed on the first bevel gear 12. The second bevel gear 13 is fixedly sleeved on the central shaft 5. A first motor 10 that drives the drive rod 11 to rotate is fixedly installed on the lower end plate. The first motor 10 can drive the central shaft 5 to rotate.

[0037] Specifically, the first motor 10 is a stepper motor with a step angle of 90 degrees. Through a conversion mechanism, it can drive the central shaft 5 to rotate, controlling the rotation of the right-angle mounting bracket to switch the positions of the display screen 8 and the solar panel 9. The forward and reverse rotation of the first motor 10 can complete the back-and-forth switching between the display screen 8 and the solar panel 9. When the display screen 8 is in the upper horizontal position, the ground target is in the working state of UAV aerial photogrammetry. When the solar panel 9 is in the upper horizontal position, the ground target is in the charging sleep state. The switching between the two states is remotely controlled by the UAV equipment terminal for photogrammetry. That is, when UAV photogrammetry is being performed, the ground target is in the working state, and the display screen 8 displays the target pattern. When UAV photogrammetry is not being performed, the ground target is in the charging sleep state, and the solar panel 9 replenishes the battery 45 with power to ensure the effective operation of the display screen 8 during subsequent work, so that the ground target can effectively perform target work in one position for a long time.

[0038] Reference Figures 3-6 A base plate 14 is fixedly sleeved to the outer end of the upright frame 4. A processing frame 15 is fixedly connected to the upper end of the base plate 14. A right-angle mounting bracket is located inside the processing frame 15 and has cleaning mechanisms on both sides. An inwardly clipped protective frame 46 is fixedly connected to the upper end of the processing frame 15, which provides a certain degree of shielding and protection to prevent large foreign objects from falling into the processing frame 15. The cleaning mechanism includes a moving component. A scraper component is located on the side of the moving component near the right-angle mounting bracket. The two moving components can drive the two scraper components to move respectively. In the working state of the ground target, the scraper component on the right side can clean the surface of the solar panel 9 during movement; in the charging sleep state, the scraper component on the left side can clean the surface of the display screen 8 during movement, ensuring that the surface of the display screen 8 is clean each time it is in working state, so as not to affect the target operation. In the charging sleep state, the surface of the solar panel 9 is clean each time it is in charging sleep state, so as to effectively carry out power generation and storage.

[0039] The moving component includes a sliding rod 16 and a threaded rod 17 arranged parallel to each other. The sliding rod 16 is fixedly connected to the front and rear inner walls of the processing frame 15, and the threaded rod 17 is rotatably connected to the front and rear inner walls of the processing frame 15. A moving sleeve 19 is fitted on both the sliding rod 16 and the threaded rod 17. The lower moving sleeve 19 is threadedly connected to the threaded rod 17, and the upper moving sleeve 19 is slidably fitted on the corresponding sliding rod 16. A vertical rod 20 is fixedly connected between the two corresponding moving sleeves 19, which serves to connect the two moving sleeves 19. A second motor 18 is fixedly installed at the front end of the processing frame 15 to drive the threaded rod 17 to rotate. The second motor 18 can drive the corresponding threaded rod 17 to perform forward and reverse rotation work in a certain cycle.

[0040] The scraper assembly includes two clamping plates 21 spaced apart front and back. A cleaning sponge 22 is fixedly connected between the two clamping plates 21. Spring plates 23 are fixedly connected between the two clamping plates 21 and two movable sleeve blocks 19 located on the same side. The corresponding scraper assembly can be moved by the movable assembly, so as to carry out cleaning work using the cleaning sponge 22. The spring plates 23 allow the two clamping plates 21 to move to a certain extent. The upper and lower ends of each clamping plate 21 are beveled.

[0041] A scraper processing mechanism is provided on the central shaft 5. The scraper processing mechanism can clean and wet the scraper assemblies on the two cleaning mechanisms. The initial position of the scraper assembly corresponds to the position of the scraper processing mechanism. The scraper processing mechanism includes a hollow sleeve 24 fixedly sleeved on the central shaft 5 and located behind the right-angle mounting bracket. Two processing rods 25 are evenly fixedly connected to the outer circumference of the hollow sleeve 24. The two processing rods 25 are arranged parallel to the connecting rod 7 and each end is provided with a squeezing port 26. The width of the squeezing port 26 is less than the maximum width of the scraper assembly. A nozzle 27 is provided on the inner wall of the squeezing port 26 for spraying water. An internal tube 28 is provided inside the processing rod 25 to connect the nozzle 27 and the hollow sleeve 24.

[0042] Specifically, when switching between working and charging / sleep states, the right-angle mounting bracket rotates 90 degrees. During this rotation, the two processing rods 25 also rotate, and the two squeezing ports 26 can contact the chamfered angles on the corresponding clamps 21, thus smoothly fitting onto the corresponding scraper assembly and squeezing the two clamps 21 towards the center. This compresses the cleaning sponge 22, and the nozzle 27 continuously sprays water towards the compressed cleaning sponge 22 during the movement. The processing rods 25 rotating from top to bottom mainly wet the cleaning sponge 22, keeping it moist before cleaning, and the squeezed state prevents it from fully absorbing water, thus maintaining good adsorption of dirt. The processing rods 25 rotating from bottom to top mainly clean the cleaning sponge 22, rinsing away dirt attached after cleaning, and the squeezed state can squeeze out some dirt to assist in the rinsing process. This ensures that the cleaning sponges 22 are in good clean condition before cleaning the display screen 8 and solar panel 9, ensuring effective cleaning.

[0043] A water supply mechanism is provided at the lower end of the base plate 14. The water supply mechanism includes a water tank 29, a gear pump 30, an accumulator 31 and two push-button shut-off valves 32, which are fixedly connected to the lower end of the base plate 14. The gear pump 30 and the accumulator 31 are existing technologies. The water tank 29 stores clean water.

[0044] The drive end of the gear pump 30 is fixedly fitted with two first sprockets. Two threaded rods 17 are fitted with one-way bearings. The inner rings of the two one-way bearings are fixedly connected to the corresponding threaded rods 17. The two one-way bearings rotate in the same direction. The outer rings of the two one-way bearings are fixedly fitted with second sprockets. The first sprockets and the second sprockets, which are located on the same plane, are fitted with a chain 39. When the second motor 18 controls the scraper assembly to move forward through the threaded rods 17, the outer ring and inner ring of the one-way bearings lock and rotate synchronously. The gear pump 30 can then be driven to rotate through the chain 39. The chain 39 on the other side also rotates, but the corresponding threaded rods 17 are not affected. When the second motor 18 controls the scraper assembly to move backward through the threaded rods 17, the inner ring of the one-way bearing rotates, but the outer ring is not affected, and the gear pump 30 cannot rotate. Thus, it can be seen that the two second motors 18 can drive the gear pump 30 to work when they are driven forward by themselves.

[0045] A first connecting pipe 33 connects the water tank 29 and the inlet of the gear pump 30. A second connecting pipe 34 connects the outlet of the gear pump 30 and the inlet of the accumulator 31. When the gear pump 30 is working, it can input clean water into the accumulator 31 for pressurized energy storage. A one-way valve is installed on the second connecting pipe 34 to prevent liquid backflow. A third connecting pipe 35 connects the outlet of the accumulator 31 and the push-to-close valve 32 on the right. A fourth connecting pipe 36 connects the two push-to-close valves 32. A water supply pipe 37 connects the push-to-close valve 32 on the left and the hollow casing 24. When both push-to-close valves 32 are open, the clean water in the accumulator 31 can be delivered under high pressure to the hollow casing 24 and sprayed out from the two nozzles 27.

[0046] Both press-off valves 32 are fixedly connected to press blocks 38 at their press ends. Both press blocks 38 extend above the base plate 14. When the ground target is in working state or charging sleep state, one press block 38 can be pressed at the end of the right-angle plate 6 near the base plate 14, keeping one press-off valve 32 closed. Thus, the nozzle 27 cannot spray cleaning water in working state or charging sleep state. Only during the transition between working state and charging sleep state will neither press the two press blocks 38, and both press-off valves 32 will remain open. The two nozzles 27 can maintain water spraying as they rotate with the processing rod 25 until the state transition is completed. Then, one press block 38 is pressed, and the nozzle 27 stops spraying water, ensuring the effective use of cleaning water and avoiding unnecessary waste.

[0047] Each time a cleaning operation is performed, a certain amount of cleaning water can be injected into the accumulator 31 through the gear pump 30 to store energy, ensuring a stable water supply for the cleaning and wetting of the cleaning sponge 22.

[0048] A water receiving hopper 40 is fixedly connected to the left side wall of the treatment frame 15. The lower end of the water receiving hopper 40 is connected to the water tank 29 by a water supply pipe 41, which is used to replenish the water tank 29 with cleaning water. A sewage outlet 42 and a drain hole 43 are provided on the bottom plate 14 to facilitate the discharge of sewage from the treatment frame 15.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ground target for aerial photogrammetry using an unmanned aerial vehicle (UAV), comprising a base (1), characterized in that, A frame (4) is mounted on the base (1) by a support mechanism. A central shaft (5) runs through the frame (4) in the front and back directions. A display screen (8) and a solar panel (9) are mounted on the central shaft (5) by a right-angle mounting bracket. A conversion mechanism is provided inside the frame (4). The conversion mechanism can drive the central shaft (5) to rotate, control the right-angle mounting bracket to rotate, and switch the positions of the display screen (8) and the solar panel (9). The outer end of the upright frame (4) is fixedly sleeved with a base plate (14), and the upper end of the base plate (14) is fixedly connected with a processing frame (15). The right-angle mounting bracket is located inside the processing frame (15) and is provided with cleaning mechanisms on both sides. The cleaning mechanism includes a moving component. The moving component is provided with a scraper component on the side close to the right-angle mounting bracket. The central shaft (5) is provided with a scraper processing mechanism. The scraper processing mechanism can clean and wet the scraper components on the two cleaning mechanisms. The lower end of the base plate (14) is provided with a water supply mechanism. The moving component includes a sliding rod (16) and a threaded rod (17) arranged parallel to each other. The sliding rod (16) is fixedly connected to the front and rear inner walls of the processing frame (15), and the threaded rod (17) is rotatably connected to the front and rear inner walls of the processing frame (15). A moving sleeve (19) is sleeved on both the sliding rod (16) and the threaded rod (17). A vertical rod (20) is fixedly connected between the two corresponding moving sleeves (19). A second motor (18) for driving the threaded rod (17) to rotate is fixedly installed at the front end of the processing frame (15). The scraper assembly includes two clamping plates (21) spaced apart front and back. A cleaning sponge (22) is fixedly connected between the two clamping plates (21). A spring sheet (23) is fixedly connected between the two clamping plates (21) and two movable sleeves (19) located on the same side. The upper and lower ends of each clamping plate (21) are chamfered. The scraper processing mechanism includes a hollow sleeve (24) fixedly sleeved on the central shaft (5) and located behind the right-angle mounting bracket. Two processing rods (25) are evenly fixedly connected to the outer circumference of the hollow sleeve (24). The two processing rods (25) are arranged parallel to the connecting rod (7) and each end is provided with a squeezing port (26). The width of the squeezing port (26) is less than the maximum width of the scraper assembly. A nozzle (27) is provided on the inner wall of the squeezing port (26). An internal tube (28) connecting the nozzle (27) and the hollow sleeve (24) is provided inside the processing rod (25). The water supply mechanism includes a water tank (29), a gear pump (30), an accumulator (31), and two push-button shut-off valves (32) fixedly connected to the lower end of the base plate (14). The water tank (29) and the inlet end of the gear pump (30) are connected by a first connecting pipe (33). The outlet end of the gear pump (30) and the inlet end of the accumulator (31) are connected by a second connecting pipe (34). A one-way valve is installed on the second connecting pipe (34). The accumulator (32) The outlet end of 1) is connected to the right-side press shut-off valve (32) by a third connecting pipe (35), and the two press shut-off valves (32) are connected to a fourth connecting pipe (36). The left-side press shut-off valve (32) is connected to the hollow sleeve (24) by a water supply pipe (37). The pressing ends of the two press shut-off valves (32) are fixedly connected to pressing blocks (38), and the two pressing blocks (38) extend to the top of the base plate (14). The drive end of the gear pump (30) is fixedly fitted with two first sprockets, and each of the two threaded rods (17) is fitted with a one-way bearing. The inner rings of the two one-way bearings are fixedly connected to the corresponding threaded rods (17), and the outer rings of the two one-way bearings are fixedly fitted with second sprockets. The first sprockets and the second sprockets located on the same plane are fitted with a chain (39).

2. The UAV aerial photogrammetry ground target according to claim 1, characterized in that, The support mechanism includes a support column (2) fixedly connected to the base (1), a lower end plate fixedly connected to the support column (2), a jack (3) fixedly installed on the lower end plate, an upper end plate fixedly connected to the telescopic end of the jack (3), and the upright frame (4) fixedly on the upper end plate.

3. The UAV aerial photogrammetry ground target according to claim 1, characterized in that, The right-angle mounting bracket consists of a right-angle plate (6) and two connecting rods (7). The display screen (8) and the solar panel (9) are respectively fixedly mounted on the two outer end faces of the right-angle plate (6). The two ends of the two connecting rods (7) are respectively fixed to the inner side of the right-angle plate (6), and the center position is fixed to the central shaft rod (5).

4. A ground target for UAV aerial photogrammetry according to claim 2, characterized in that, The conversion mechanism includes a drive rod (11) rotatably connected in the frame (4), a first bevel gear (12) fixedly sleeved on the upper end of the drive rod (11), a second bevel gear (13) vertically meshing on the first bevel gear (12), the second bevel gear (13) fixedly sleeved on the central shaft (5), and a first motor (10) for driving the drive rod (11) to rotate fixedly installed on the lower end plate.

5. A ground target for UAV aerial photogrammetry according to claim 1, characterized in that, A water receiving hopper (40) is fixedly connected to the left side wall of the processing frame (15), and a water supply pipe (41) is connected between the lower end of the water receiving hopper (40) and the water tank (29).

6. A ground target for UAV aerial photogrammetry according to claim 1, characterized in that, The base plate (14) is provided with a drain outlet (42) and a drain hole (43). A battery box (44) is fixedly connected to the upper end of the base (1). A storage battery (45) is installed inside the battery box (44). An inner-clamped protective frame (46) is fixedly connected to the upper end of the processing frame (15).

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