A tilt camera angle fine adjustment mechanism for unmanned aerial vehicle aerial survey

Abstract

The utility model discloses an oblique photography camera angle fine adjustment mechanism for unmanned aerial vehicle aerial survey, including the mounting panel, the bottom end of mounting panel is rotatively connected with transmission shaft, still include setting in the adjusting assembly and drive assembly of mounting panel below, the adjusting assembly includes the rotary plate no.

Description

Technical Field

[0001] This utility model relates to the field of UAV aerial surveying technology, and in particular to a mechanism for fine-tuning the angle of an oblique photography camera used in UAV aerial surveying. Background Technology

[0002] In the field of UAV aerial surveying, oblique photogrammetry technology acquires three-dimensional information of ground features by taking pictures from multiple angles, which requires extremely high precision in camera angle adjustment. Traditional adjustment mechanisms mostly use single-degree-of-freedom rotational structures, which have problems with limited adjustment range and insufficient precision.

[0003] A search revealed Chinese patent CN212220582U, which discloses an oblique photography camera for UAV aerial surveying. The camera includes a base plate fixed to the UAV by screws. The device rotates the camera via a camera mounting frame, enabling the camera to rotate at an angle on its vertical plane. This facilitates the oblique camera's observation of the surrounding environment and avoids the need for pre-calculation of the camera's angle, thus saving time.

[0004] However, the device still has the following problems. The device drives the camera mounting frame to rotate through the interaction between the motor, the synchronous pulley, and the synchronous belt, thereby driving the camera to rotate. However, in actual use, the device lacks a corresponding speed reduction transmission component, which makes it difficult to fine-tune the tilt angle of the camera by driving the camera mounting frame to rotate through the synchronous belt at a large angle. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mechanism for fine-tuning the angle of an oblique photography camera used in UAV aerial surveying.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mechanism for fine-tuning the angle of an oblique photography camera used in UAV aerial surveying includes a mounting plate, a drive shaft rotatably connected to the bottom end of the mounting plate, and an adjustment component and a drive component disposed below the mounting plate.

[0008] The adjustment assembly includes a rotating plate 1 fixedly connected to the bottom end of a drive shaft. A connecting plate is fixedly connected to the bottom end of the rotating plate 1. A rotating shaft 1 is rotatably connected to the bottom end of the connecting plate. Connecting blocks are rotatably connected to both ends of the rotating shaft 1. A rotating plate 2 is fixedly connected to the bottom end of a pair of connecting blocks. A camera is mounted on the bottom end of the rotating plate 2. A pair of side plates are fixedly connected to both sides of the bottom of the rotating plate 1. A double-ended threaded rod is rotatably connected to one end of the pair of side plates. A slider is threaded to both ends of the double-ended threaded rod, and the top end of the slider is slidably connected to the bottom of the rotating plate 1. A fixing block is fixedly connected to one side of the top of the rotating plate 2. A rotating shaft 2 is rotatably connected to one end of the fixing block. Transmission blocks are rotatably connected to both ends of the rotating shaft 2. A fixing seat is fixedly connected to the top end of each transmission block and the bottom end of the slider. A connecting rod is rotatably connected between each pair of fixing seats via a rotating shaft. By using a double-layer structure design of rotating plate one and rotating plate two, combined with the linkage mechanism of connecting rod and slider, the angle of pitch and roll can be finely adjusted in a coordinated manner, thus expanding the adjustable range of the camera.

[0009] Preferably, the drive assembly includes a transmission gear fixedly connected to one end of the outer peripheral wall of the transmission shaft, and a stepper motor is fixedly connected to the bottom of the mounting plate near the transmission shaft.

[0010] Preferably, the output shaft of the stepper motor is fixedly connected to a drive gear that meshes with the transmission gear, and the gear ratio between the drive gear and the transmission gear is 1:10. The combination of the stepper motor and the transmission gear, along with the 1:10 gear ratio reduction of the drive gear, improves the adjustment accuracy of the mechanism.

[0011] Preferably, a worm gear is fixedly connected to the outer peripheral wall of the double-ended threaded rod near the side plate, a fixed frame is fixedly connected to one end of the side plate, a worm gear meshing with the worm gear is rotatably connected to one end of the fixed frame, and the top end of the outer peripheral wall of the worm gear is rotatably connected to the rotating plate.

[0012] Preferably, a drive motor is fixedly connected to the top of the rotating plate near the side plate, and the output shaft of the drive motor is fixedly connected to the top of the worm. The helix angle between the worm and the worm wheel is smaller than the friction angle. The self-locking effect between the worm wheel and the worm improves the stability of the mechanism's angle adjustment.

[0013] Preferably, the two ends of the double-threaded rod are configured with opposite thread directions, and the drive shaft is coaxially arranged with the mounting plate and the rotating plate. The opposing threads at both ends of the double-threaded rod drive the sliders to move synchronously in opposite directions, ensuring balanced force on the rotating plate and avoiding camera optical axis deviation caused by unilateral offset.

[0014] The beneficial effects of this utility model are as follows:

[0015] Through the interaction between the transmission block, the rotating shaft 2, and the fixed block, the rotating plate 2 is driven to rotate around the rotating shaft 1, and the camera is finely adjusted to a specified angle. Then, through the interaction between the stepper motor, the drive gear, and the transmission gear, the transmission shaft is driven to rotate the rotating plate 1, and the camera is finely adjusted to a specified angle. The large transmission gear ratio between the worm gear and the worm, as well as between the drive gear and the transmission gear, improves the accuracy of the mechanism in finely adjusting the tilt angle of the camera, effectively improving the accuracy of UAV aerial surveying work.

[0016] The self-locking effect between the worm gear and the worm prevents external forces from causing the camera angle to deflect, effectively improving the stability of UAV aerial surveying. Attached Figure Description

[0017] Figure 1 This is a first-view three-dimensional structural diagram of an angle fine-tuning mechanism for an oblique photography camera used in UAV aerial surveying proposed in this utility model.

[0018] Figure 2 This is a second-view three-dimensional structural diagram of an angle fine-tuning mechanism for an oblique photography camera used in UAV aerial surveying proposed in this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of some components of an angle fine-tuning mechanism for an oblique photography camera used in UAV aerial surveying proposed in this utility model;

[0020] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0021] In the diagram: 1. Mounting plate; 2. Drive shaft; 3. Rotating plate one; 4. Stepper motor; 5. Transmission gear; 6. Drive gear; 7. Connecting plate; 8. Rotating shaft one; 9. Connecting block; 10. Rotating plate two; 11. Side plate; 12. Double-ended threaded rod; 13. Slider; 14. Fixing block; 15. Rotating shaft two; 16. Transmission block; 17. Fixing seat; 18. Connecting rod; 19. Worm gear; 20. Fixing frame; 21. Worm; 22. Drive motor; 23. Camera. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1, referring to Figure 1-4A tilt camera angle fine-tuning mechanism for UAV aerial surveying includes a mounting plate 1 made of high-strength alloy material to improve the overall structural strength of the mechanism. The bottom end of the mounting plate 1 is rotatably connected to a transmission shaft 2 via a bearing. The mechanism also includes an adjustment component and a drive component located below the mounting plate 1.

[0024] like Figures 2-4 As shown, in one embodiment, the adjustment assembly includes a rotating plate 3 fixedly connected to the bottom end of the drive shaft 2. The drive shaft 2, mounting plate 1, and rotating plate 3 are coaxially arranged. A connecting plate 7 is fixedly connected to the bottom end of the rotating plate 3. A rotating shaft 8 is rotatably connected to the bottom end of the connecting plate 7. Connecting blocks 9 are rotatably connected to both ends of the rotating shaft 8. A rotating plate 10 is fixedly connected to the bottom ends of a pair of connecting blocks 9. Through the mutual cooperation between the connecting blocks 9, the rotating shaft 8, and the connecting plate 7, the rotating plate 10 can rotate around the rotating shaft 8. A camera 23 is mounted on the bottom end of the rotating plate 10. A pair of side plates 11 are fixedly connected to the bottom sides of the rotating plate 3 by welding. One end of the pair of side plates 11 is rotatably connected to a double-threaded rod 12 through a bearing. Both ends of the double-threaded rod 12 are threadedly connected to a sliding plate. Block 13, with the top of slider 13 slidably connected to the bottom of rotating plate 1 3. The two ends of the double-threaded rod 12 are arranged with opposite thread directions. The double-threaded rod 12 drives a pair of sliders 13 to move synchronously in opposite directions. A fixed block 14 is fixedly connected to one side of the top of rotating plate 2 10. A rotating shaft 2 15 is rotatably connected to one end of the fixed block 14. Both ends of the rotating shaft 2 15 are rotatably connected to transmission blocks 16. Through the mutual cooperation between the transmission blocks 16, the rotating shaft 2 15, and the fixed block 14, rotating plate 2 10 is driven to rotate around rotating shaft 1 8. The top of each transmission block 16 is fixedly connected to the bottom of slider 13 with a fixed seat 17. Each pair of fixed seats 17 is rotatably connected to a connecting rod 18 through a rotating shaft. Through the mutual cooperation between the fixed seats 17 and the connecting rod 18, the horizontal movement of slider 13 drives the vertical movement of transmission block 16.

[0025] like Figure 1 and Figure 2 As shown, in one embodiment, the driving assembly includes a transmission gear 5 fixedly connected to one end of the outer peripheral wall of the transmission shaft 2. A stepper motor 4 is fixedly connected to the bottom of the mounting plate 1 near the transmission shaft 2. The output shaft of the stepper motor 4 is fixedly connected to a drive gear 6 that meshes with the transmission gear 5. The stepper motor 4 drives the drive gear 6 to rotate, and the gear ratio between the drive gear 6 and the transmission gear 5 is 1:10. Through the mutual cooperation between the drive gear 6 and the transmission gear 5, the transmission shaft 2 is driven to rotate.

[0026] like Figure 2 and Figure 3 As shown, in one embodiment, a worm gear 19 is fixedly connected to the outer peripheral wall of the double-ended threaded rod 12 near the side plate 11. A fixing frame 20 is fixedly connected to one end of the side plate 11. A worm 21 that meshes with the worm gear 19 is rotatably connected to one end of the fixing frame 20. Through the mutual cooperation between the worm gear 19 and the worm 21, the double-ended threaded rod 12 is driven to rotate. The top of the outer peripheral wall of the worm 21 is rotatably connected to the rotating plate 3. A drive motor 22 is fixedly connected to the top of the rotating plate 3 near the side plate 11. The output shaft of the drive motor 22 is fixedly connected to the top of the worm 21. The drive motor 22 drives the worm 21 to rotate. The helix angle between the worm 21 and the worm gear 19 is smaller than the friction angle. Through the self-locking effect between the worm gear 19 and the worm 21, the rotation angle of the rotating plate 10 is prevented from deflecting due to external forces, thus improving the stability of UAV aerial surveying.

[0027] Working principle: In use, first start the drive motor 22, which drives the worm gear 21 to rotate. Then, through the interaction between the worm gear 21 and the worm wheel 19, the double-threaded rod 12 rotates. The double-threaded rod 12 then drives a pair of sliders 13 to slide synchronously in opposite directions. Then, through the interaction between the fixed seat 17 and the connecting rod 18, the lateral movement of the sliders 13 drives the longitudinal movement of the transmission block 16. Then, through the interaction between the transmission block 16, the rotating shaft 15, and the fixed block 14, the rotating plate 10 rotates around the rotating shaft 8, and the fine-tuning camera 23 deflects to the specified position. The angle is set, and then the stepper motor 4 is started. Through the interaction between the stepper motor 4, the drive gear 6, and the transmission gear 5, the transmission shaft 2 is driven to rotate the rotating plate 3, and the camera 23 is finely adjusted to rotate to the specified angle. Through the large transmission gear ratio between the worm gear 19 and the worm 21, as well as between the drive gear 6 and the transmission gear 5, the accuracy of the mechanism in adjusting the tilt angle of the camera 23 is improved, which effectively improves the accuracy of the UAV aerial survey. At the same time, through the self-locking effect between the worm gear 19 and the worm 21, the angle of the camera 23 is prevented from deflecting due to external forces, which effectively improves the stability of the UAV aerial survey.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mechanism for fine-tuning the angle of an oblique photography camera used in UAV aerial surveying, comprising a mounting plate (1), wherein a transmission shaft (2) is rotatably connected to the bottom end of the mounting plate (1), characterized in that, It also includes adjustment components and drive components located below the mounting plate (1); The adjustment assembly includes a rotating plate (3) fixedly connected to the bottom end of the transmission shaft (2). A connecting plate (7) is fixedly connected to the bottom end of the rotating plate (3). A rotating shaft (8) is rotatably connected to the bottom end of the connecting plate (7). Connecting blocks (9) are rotatably connected to both ends of the rotating shaft (8). A rotating plate (10) is fixedly connected to the bottom ends of the pair of connecting blocks (9). A camera (23) is mounted on the bottom end of the rotating plate (10). A pair of side plates (11) are fixedly connected to the bottom sides of the rotating plate (3). A double-headed screw is rotatably connected to one end of the pair of side plates (11). The threaded rod (12) has a slider (13) threaded at both ends, and the top of the slider (13) is slidably connected to the bottom of the rotating plate (3). A fixing block (14) is fixedly connected to one side of the top of the rotating plate (10). A rotating shaft (15) is rotatably connected to one end of the fixing block (14). A transmission block (16) is rotatably connected to both ends of the rotating shaft (15). A fixing seat (17) is fixedly connected to the top of each transmission block (16) and the bottom of the slider (13). A connecting rod (18) is rotatably connected between each pair of fixing seats (17) through a rotating shaft.

2. The angle fine-tuning mechanism for an oblique photography camera used in UAV aerial surveying according to claim 1, characterized in that, The drive assembly includes a transmission gear (5) fixedly connected to one end of the outer peripheral wall of the transmission shaft (2), and a stepper motor (4) is fixedly connected to the bottom of the mounting plate (1) near the transmission shaft (2).

3. The angle fine-tuning mechanism for an oblique photography camera used in UAV aerial surveying according to claim 2, characterized in that, The output shaft of the stepper motor (4) is fixedly connected to a drive gear (6) that meshes with the transmission gear (5), and the gear ratio between the drive gear (6) and the transmission gear (5) is 1:

10.

4. The tilt camera angle fine-tuning mechanism for UAV aerial surveying according to claim 3, characterized in that, A worm gear (19) is fixedly connected to the outer peripheral wall of the double-ended threaded rod (12) near the side plate (11). A fixing frame (20) is fixedly connected to one end of the side plate (11). A worm (21) that meshes with the worm gear (19) is rotatably connected to one end of the fixing frame (20), and the top of the outer peripheral wall of the worm (21) is rotatably connected to the rotating plate (3).

5. The tilt camera angle fine-tuning mechanism for UAV aerial surveying according to claim 4, characterized in that, A drive motor (22) is fixedly connected to the top of the rotating plate (3) near the side plate (11), and the output shaft of the drive motor (22) is fixedly connected to the top end of the worm (21). The helix angle between the worm (21) and the worm wheel (19) is smaller than the friction angle.

6. The angle fine-tuning mechanism for an oblique photography camera used in UAV aerial surveying according to claim 1, characterized in that, The two ends of the double-threaded rod (12) are arranged with opposite thread directions, and the transmission shaft (2) is coaxial with the mounting plate (1) and the rotating plate (3).

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