Image acquisition device for three-dimensional reconstruction

Abstract

The utility model relates to the technical field of image acquisition, in particular to an image acquisition device for three-dimensional reconstruction. The device comprises a connecting base, top columns, cameras and a placing disc, the top columns are fixed to the four end corners of the top of the connecting base, the cameras are fixed to the tops of the four top columns, the placing disc is arranged on the top of the connecting base, a rotating structure is arranged on the inner side of the connecting base, and a position adjusting structure is arranged on the top of the rotating structure. According to the image acquisition device for three-dimensional reconstruction provided by the utility model, through the design of the rotating structure, uniform and dense image acquisition can be realized, and since the device can reasonably control the rotating speed, images with proper quantity and uniform angles can be acquired at different parts of an object, so that the image acquisition efficiency is improved. Rich and accurate data are provided for a three-dimensional reconstruction algorithm, so that the reconstructed three-dimensional model is more accurate, errors and flaws of the model are reduced, and the method can meet the requirements of the shape and size of an object and the specific precision of three-dimensional reconstruction.

Description

Technical Field

[0001] This utility model relates to the field of image acquisition technology, and in particular to an image acquisition device for three-dimensional reconstruction. Background Technology

[0002] With the continuous development of visual technology, 3D reconstruction has been widely applied in many fields such as industrial inspection, cultural relic protection, and virtual reality. Image acquisition, as a crucial initial step in 3D reconstruction, directly affects the accuracy and efficiency of the reconstruction process due to the performance of the acquisition device. Traditional image acquisition devices mostly employ single cameras or fixed arrays of multiple cameras. Single-camera acquisition requires manual adjustment of the shooting angle, which is not only time-consuming but also prone to image perspective deviations due to human operation, making it difficult to guarantee data consistency. While fixed arrays of multiple cameras can acquire images from multiple perspectives at once, their fixed layout and lack of flexibility make them unsuitable for acquiring objects of different sizes and shapes. Furthermore, existing devices have shortcomings in lighting control; ambient light interference or uneven lighting can cause shadows or reflections in the acquired images, severely affecting subsequent image feature extraction and matching, leading to errors or even failures in the 3D reconstruction model. Therefore, there is an urgent need for a more efficient, flexible image acquisition device that can adapt to complex environments.

[0003] For example, Chinese utility model patent (CN216590694U) discloses a 3D reconstruction imaging device based on multi-view vision, which solves the following problems: Currently, most 3D reconstruction auxiliary imaging devices can only photograph objects in a fixed direction. If it is necessary to adjust the camera to complete multi-angle and multi-directional shooting, the support structure usually needs to be manually adjusted, resulting in a very low degree of automation. It is also very cumbersome to take a large number of pictures of the same object from different angles, which consumes a lot of manpower and time, thus affecting the progress of the work.

[0004] The device includes a platform with a lifting mechanism and a multi-camera lifting and surround shooting device at its upper end. The lifting mechanism is equipped with a drive motor that drives a worm gear and hinge linkage mechanism. The lifting platform is used to place the object to be reconstructed in 3D. The multi-camera surround lifting and shooting device is equipped with guide rails and sliders that can be raised and lowered along lead screws and optical rods. The camera slide can slide along the guide rails. The camera slide is equipped with electric rollers to drive the camera slide, and a servo motor is used to adjust the horizontal shooting angle of the camera. The camera is used for image data acquisition. The device can conveniently and quickly perform all-round stereoscopic shooting of objects, saving image data acquisition time and improving the efficiency of 3D reconstruction.

[0005] When using the above-mentioned technology, the following technical problems were found in the existing technology: the rotation speed of the device is not adjustable, and it is impossible to flexibly adjust the image acquisition speed according to the size, shape and accuracy requirements of the object and the 3D reconstruction. For objects with complex shapes, a slower rotation speed may be required to obtain clearer and more detailed images, but the fixed rotation speed of the device may be too fast, resulting in blurred images and affecting the accuracy of subsequent feature extraction and matching. In addition, the position of the tray is not adjustable, making it difficult to ensure that the acquisition device and the object being photographed are in the best relative position. For example, for objects of different sizes, the distance between the device and the object cannot be adjusted according to their size, which may result in an inappropriate proportion of the object in the image. If it is too small, it will waste image resolution; if it is too large, it may not be possible to capture the entire object, which will also reduce image quality and bring difficulties to 3D reconstruction. To address these issues, we designed an image acquisition device for 3D reconstruction to provide an alternative technical solution. Utility Model Content

[0006] Therefore, it is necessary to provide an image acquisition device for three-dimensional reconstruction to address the aforementioned technical problems and solve the issues raised in the background section.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an image acquisition device for three-dimensional reconstruction, comprising a connecting seat, top columns, cameras and a placement plate, wherein top columns are fixed at the four corners of the top of the connecting seat, cameras are fixed at the top of the four top columns, a placement plate is provided on the top of the connecting seat, a rotating structure is provided on the inner side of the connecting seat, and a position adjustment structure is provided on the top of the rotating structure.

[0008] As a preferred embodiment of the image acquisition device for three-dimensional reconstruction provided by this utility model, the rotating structure includes a speed regulating mechanism and a power mechanism. One end of the inner side of the connecting seat is fixed with the power mechanism, and the other end of the inner side of the connecting seat is fixed with the speed regulating mechanism. The speed regulating mechanism and the power mechanism are fixed.

[0009] As a preferred embodiment of the image acquisition device for three-dimensional reconstruction provided by this utility model, the power mechanism includes a motor, a first bevel gear, a second bevel gear, a rotating rod, a first gear, a second gear, a fourth gear, a rotating column, a rotating shaft, and a turntable. The rotating shaft is rotatably connected to the bottom of the inner side of the connecting seat. The turntable is fixed to the top of the rotating shaft. The motor is fixed to one end of the bottom side of the turntable by a wooden board. The output end of the motor is fixed to the first bevel gear. The second bevel gear is meshed with one side of the first bevel gear. The rotating rod is fixed to the inner side of the second bevel gear. The rotating rod and the turntable are rotatably connected. The first gear is fixed to the top of the rotating rod. The second gear is meshed with one side of the first gear. The fourth gear is meshed with one side of the second gear. The rotating column is fixed to the bottom side of the fourth gear. The rotating column and the connecting seat are rotatably connected. The outer side of the rotating column and the turntable are slidably connected.

[0010] As a preferred embodiment of the image acquisition device for three-dimensional reconstruction provided by this utility model, the speed regulating mechanism includes a third gear, a concave plate, an electric rotary motor, a worm gear, and a worm wheel. A concave plate is fixed to one end of the bottom inner side of the connecting seat, and a worm gear is rotatably connected to the inner side of the concave plate. A worm wheel is fixed to the outer side of the rotating shaft, and the worm wheel and the worm gear are meshed together. An electric rotary motor is fixed to one end of the concave plate, and the output end of the electric rotary motor is fixed to the worm gear. A third gear is rotatably connected to one side of the bottom of the turntable, and the third gear is meshed with the first gear.

[0011] As a preferred embodiment of the image acquisition device for three-dimensional reconstruction provided by this utility model, the position adjustment structure includes a fixed base, a first slider, a first motor, a first screw, a second slider, a second motor, a second screw, a moving plate, and a pushing mechanism. The top of the rotating column is fixed with a fixed base. The two ends of the inner side of the fixed base are slidably connected to the first slider. The two first sliders are rotatably connected to the side of each other. The first screw is fixed to one side of one of the first sliders. The output end of the first motor is fixed to the first screw. The two sides of the inner side of the fixed base are slidably connected to the second slider. The two second sliders are rotatably connected to the side of each other. The second motor is fixed to one end of one of the second sliders. The output end of the second motor is fixed to the second screw. The first screw and the second screw are at a 90-degree angle to each other in the horizontal direction. The outer sides of the first screw and the second screw are threaded with a moving plate.

[0012] In a preferred embodiment of the image acquisition device for three-dimensional reconstruction provided by this utility model, the pushing mechanism includes a third motor, a cam, a slide bar, and a spring. The inner side of the top of the moving plate is rotatably connected to the cam. One end of the moving plate is fixed to the third motor, and the output end of the third motor is fixed to the cam. Both ends of the top of the moving plate are slidably connected to slide bars. The tops of the two slide bars are fixed to the placement plate. The outer sides of the two slide bars are sleeved with springs. The tops of the two springs are fixed to the placement plate, and the bottom sides of the two springs are fixed to the moving plate.

[0013] In a preferred embodiment of the image acquisition device for three-dimensional reconstruction provided by this utility model, the radii of the first gear, the second gear, the third gear, and the fourth gear are all different.

[0014] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0015] Meanwhile, through the above technical solutions, this utility model has at least the following beneficial effects: The image acquisition device for three-dimensional reconstruction provided by this utility model, through the design of the rotating structure, helps to achieve uniform and dense image acquisition. Since the device can reasonably control the rotation speed, it can acquire a suitable number of images with uniform angles at different parts of the object, providing rich and accurate data for the three-dimensional reconstruction algorithm, making the reconstructed three-dimensional model more accurate, reducing model errors and flaws. It can flexibly set the image acquisition speed according to the shape, size and specific accuracy requirements of the object and the three-dimensional reconstruction. For objects with rich details, the rotation speed can be reduced to ensure that clear and textured images are acquired, providing a high-quality data foundation for subsequent feature extraction and matching.

[0016] Through its position adjustment structure, the device can be positioned optimally according to the actual situation of the object. By changing the distance and angle between the device and the object, the object can be presented in a suitable proportion and perspective in the image, avoiding image distortion and deformation, thereby improving image quality and accuracy. It can acquire key information about the object from various angles, including some hard-to-observe parts. Furthermore, by adjusting its position, the device can acquire images of the entire object and hidden parts, enabling the 3D reconstruction algorithm to more comprehensively understand the object's structure, thus constructing a more complete and accurate 3D model and improving reconstruction precision. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an image acquisition device for three-dimensional reconstruction according to the present invention;

[0019] Figure 2 This is a side view of an image acquisition device for three-dimensional reconstruction according to the present invention;

[0020] Figure 3 This is a cross-sectional view of a connecting base for an image acquisition device used for three-dimensional reconstruction according to this utility model;

[0021] Figure 4 This is a schematic diagram showing the connection between the first gear and the third gear of an image acquisition device for three-dimensional reconstruction according to this utility model;

[0022] Figure 5 This is a schematic diagram of the connection between the worm gear and worm wheel in an image acquisition device for three-dimensional reconstruction according to this utility model;

[0023] Figure 6 This is a schematic diagram showing the connection between the second and fourth gears of an image acquisition device for three-dimensional reconstruction according to this utility model;

[0024] Figure 7 This is a schematic diagram showing the connection between the concave plate and the worm gear in an image acquisition device for three-dimensional reconstruction according to this utility model.

[0025] Figure 8 This is a schematic diagram showing the connection between the moving plate and the cam in an image acquisition device for three-dimensional reconstruction according to this utility model.

[0026] Figure 9 This is a schematic diagram showing the connection between the first screw and the moving plate of an image acquisition device for three-dimensional reconstruction according to this utility model.

[0027] In the diagram: 1. Connecting seat; 2. Top column; 3. Camera; 4. Motor; 5. First bevel gear; 6. Second bevel gear; 7. Rotating rod; 8. First gear; 9. Second gear; 10. Third gear; 11. Fourth gear; 12. Rotating column; 13. Concave plate; 14. Electric rotary motor; 15. Worm gear; 16. Worm wheel; 17. Rotating shaft; 18. Turntable; 19. Fixed seat; 20. First slider; 21. First motor; 22. First screw; 23. Second slider; 24. Second motor; 25. Second screw; 26. Moving plate; 27. Third motor; 28. Cam; 29. ​​Slide rod; 30. Spring; 31. Placement plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] As described in the background art, the rotation speed of this device is not adjustable, making it impossible to flexibly adjust the image acquisition speed according to the size, shape, and accuracy requirements of the object and the 3D reconstruction. For objects with complex shapes, a slower rotation speed may be needed to obtain clearer and more detailed images, but the fixed rotation speed of the device may be too fast, resulting in blurred images and affecting the accuracy of subsequent feature extraction and matching. Furthermore, the position of the tray is not adjustable, making it difficult to ensure that the acquisition device and the object being photographed are in the optimal relative position. For example, for objects of different sizes, the distance between the device and the object cannot be adjusted according to their size, which may result in an inappropriate proportion of the object in the image. If the object is too small, it will waste image resolution, and if it is too large, it may not be able to capture the entire object, which will also reduce image quality and make 3D reconstruction difficult.

[0030] To solve this technical problem, this utility model provides an image acquisition device for three-dimensional reconstruction.

[0031] For details, please refer to Figures 1-9 An image acquisition device for three-dimensional reconstruction specifically includes: a connecting seat 1, a top column 2, a camera 3, and a placement plate 31. The four corners of the top of the connecting seat 1 are all fixed with top columns 2, and the tops of the four top columns 2 are all fixed with cameras 3. The top of the connecting seat 1 is provided with a placement plate 31, and the inner side of the connecting seat 1 is provided with a rotating structure. The top of the rotating structure is provided with a position adjustment structure.

[0032] This utility model provides an image acquisition device for 3D reconstruction. The device, through the design of a rotating structure, helps to achieve uniform and dense image acquisition. Because the device can reasonably control the rotation speed, it can acquire a suitable number of images with uniform angles from different parts of the object, providing rich and accurate data for the 3D reconstruction algorithm, making the reconstructed 3D model more accurate, reducing model errors and flaws. It can flexibly set the image acquisition speed according to the shape, size and specific accuracy requirements of the object and the 3D reconstruction. For objects with rich details, the rotation speed can be reduced to ensure that clear and textured images are acquired, providing a high-quality data foundation for subsequent feature extraction and matching.

[0033] Through its position adjustment structure, the device can be positioned optimally according to the actual situation of the object. By changing the distance and angle between the device and the object, the object can be presented in a suitable proportion and perspective in the image, avoiding image distortion and deformation, thereby improving image quality and accuracy. It can acquire key information about the object from various angles, including some hard-to-observe parts. Furthermore, by adjusting its position, the device can acquire images of the entire object and hidden parts, enabling the 3D reconstruction algorithm to more comprehensively understand the object's structure, thus constructing a more complete and accurate 3D model and improving reconstruction precision.

[0034] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] Reference Figures 1-9 An image acquisition device for three-dimensional reconstruction includes a connecting base 1, a top column 2, a camera 3, and a placement plate 31. The top column 2 is fixed to each of the four corners of the top of the connecting base 1, and the camera 3 is fixed to the top of each of the four top columns 2. The placement plate 31 is provided on the top of the connecting base 1, and a rotating structure is provided on the inner side of the connecting base 1. A position adjustment structure is provided on the top of the rotating structure.

[0037] The rotating structure includes a speed regulating mechanism and a power mechanism. One end of the inner side of the connecting seat 1 is fixed to the power mechanism, and the other end is fixed to the speed regulating mechanism. The speed regulating mechanism and the power mechanism are fixed together. The power mechanism includes a motor 4, a first bevel gear 5, a second bevel gear 6, a rotating rod 7, a first gear 8, a second gear 9, a fourth gear 11, a rotating column 12, a rotating shaft 17, and a turntable 18. The bottom of the inner side of the connecting seat 1 is rotatably connected to the rotating shaft 17, and the top of the rotating shaft 17 is fixed to the turntable 18. One end of the bottom side of the turntable 18 is fixed to the motor 4 via a wooden board. The output end of 4 is fixed with a first bevel gear 5. A second bevel gear 6 is meshed with one side of the first bevel gear 5. A rotating rod 7 is fixed with the inner side of the second bevel gear 6. The rotating rod 7 is rotatably connected to the turntable 18. A first gear 8 is fixed with the top of the rotating rod 7. A second gear 9 is meshed with one side of the first gear 8. A fourth gear 11 is meshed with one side of the second gear 9. A rotating column 12 is fixed with the bottom side of the fourth gear 11. The rotating column 12 is rotatably connected to the connecting seat 1. The outer side of the rotating column 12 is slidably connected to the turntable 18, so that the power mechanism can drive the first gear 8 to rotate.

[0038] The speed regulating mechanism includes a third gear 10, a concave plate 13, an electric motor 14, a worm 15, and a worm wheel 16. The concave plate 13 is fixed to one end of the bottom inner side of the connecting seat 1. The worm 15 is rotatably connected to the inner side of the concave plate 13. The worm wheel 16 is fixed to the outer side of the rotating shaft 17. The worm wheel 16 and the worm 15 are meshed together. The electric motor 14 is fixed to one end of the concave plate 13. The output end of the electric motor 14 is fixed to the worm 15. The third gear 10 is rotatably connected to one side of the bottom of the turntable 18. The third gear 10 and the first gear 8 are meshed together, so that the speed regulating mechanism can drive the worm wheel 16 to rotate.

[0039] The position adjustment structure includes a fixed base 19, a first slider 20, a first motor 21, a first screw 22, a second slider 23, a second motor 24, a second screw 25, a moving plate 26, and a pushing mechanism. The top of the rotating column 12 is fixed with a fixed base 19. The two ends of the inner side of the fixed base 19 are slidably connected to the first slider 20. The two first sliders 20 are rotatably connected to the side of each other. The first motor 21 is fixed to one side of one of the first sliders 20. The output end of the first motor 21 is fixed to the first screw 22. The two sides of the inner side of the fixed base 19 are slidably connected to the second slider 23. The two second sliders 23 are rotatably connected to the side of each other. The second motor 24 is fixed to one end of one of the second sliders 23. The output end of the second motor 24 is fixed to the second screw 25. The first screw 22 and the second screw 25 are at a 90-degree angle to each other in the horizontal direction. The outer sides of the first screw 22 and the second screw 25 are threadedly connected to the moving plate 26, so that the position adjustment structure can drive the moving plate 26 to move.

[0040] The pushing mechanism includes a third motor 27, a cam 28, a slide bar 29, and a spring 30. The cam 28 is rotatably connected to the inner side of the top of the moving plate 26. The third motor 27 is fixed to one end of the moving plate 26. The output end of the third motor 27 is fixed to the cam 28. The two ends of the top of the moving plate 26 are slidably connected to the slide bar 29. The top of the two slide bars 29 is fixed to the placement plate 31. The outer sides of the two slide bars 29 are sleeved with the spring 30. The top of the two springs 30 is fixed to the placement plate 31. The bottom side of the two springs 30 is fixed to the moving plate 26. The pushing mechanism can drive the cam 28 to rotate and push the placement plate 31.

[0041] The radii of the first gear 8, the second gear 9, the third gear 10, and the fourth gear 11 are all different.

[0042] When the second gear 9 and the fourth gear 11 are engaged, the third gear 10 and the fourth gear 11 are not engaged; when the third gear 10 and the fourth gear 11 are engaged, the second gear 9 and the fourth gear 11 are not engaged.

[0043] A fan-shaped hole is provided at one end of the inner side of the turntable 18, and the turntable 18 is slidably connected to the rotating column 12 through the fan-shaped hole.

[0044] The electric motor 4, electric rotor 14, first motor 21, second motor 24 and third motor 27 all have power-off self-locking capability, which enables the travel of the device to be locked and controlled.

[0045] This utility model provides an image acquisition device for 3D reconstruction. The device, through the design of a rotating structure, helps to achieve uniform and dense image acquisition. Because the device can reasonably control the rotation speed, it can acquire a suitable number of images with uniform angles from different parts of the object, providing rich and accurate data for the 3D reconstruction algorithm, making the reconstructed 3D model more accurate, reducing model errors and flaws. It can flexibly set the image acquisition speed according to the shape, size and specific accuracy requirements of the object and the 3D reconstruction. For objects with rich details, the rotation speed can be reduced to ensure that clear and textured images are acquired, providing a high-quality data foundation for subsequent feature extraction and matching.

[0046] Through its position adjustment structure, the device can be positioned optimally according to the actual situation of the object. By changing the distance and angle between the device and the object, the object can be presented in a suitable proportion and perspective in the image, avoiding image distortion and deformation, thereby improving image quality and accuracy. It can acquire key information about the object from various angles, including some hard-to-observe parts. Furthermore, by adjusting its position, the device can acquire images of the entire object and hidden parts, enabling the 3D reconstruction algorithm to more comprehensively understand the object's structure, thus constructing a more complete and accurate 3D model and improving reconstruction precision.

[0047] The image acquisition device for 3D reconstruction provided by this utility model is used as follows: The user places the object whose image needs to be acquired on the upper end of the placement plate 31, and then the user powers on the four cameras 3 to take pictures. At this time, the user powers on the motor 4 to rotate. The output end of the motor 4 drives the first bevel gear 5 to rotate. Since the first bevel gear 5 is meshed with the second bevel gear 6 on one side, the rotation of the first bevel gear 5 drives the second bevel gear 6 to rotate. The rotation of the second bevel gear 6 drives the rotating rod 7 to rotate. The rotation of the rotating rod 7 drives the first gear 8. Since the first gear 8 is meshed with the second gear 9 on one side, the rotation of the second gear 9 drives the fourth gear 11 to rotate, which in turn drives the rotating column 12 to rotate. The rotation of the rotating column 12 drives the fixed base 19 and the placement plate 31 to rotate, thereby allowing the object on top of the placement plate 31 to rotate. When it is necessary to adjust the rotation speed of the object, the user energizes the electric motor 14 to rotate. The output end of the electric motor 14 drives the worm gear 15 to rotate. Since one side of the worm gear 15 is meshed with the worm wheel 16, the rotation of the worm gear 15 drives the worm wheel 16 to rotate, thereby driving the rotating shaft 17 and the turntable 18 to rotate. This causes the second gear 9 to disengage from the fourth gear 11, and the third gear 10 to re-engage with the fourth gear 11. Thus, the rotation speed of the fourth gear 11 and the rotating column 12 can be adjusted, thereby meeting the diverse needs of different application scenarios for image acquisition speed. For example, in industrial inspection, for fast-moving objects, the rotation speed can be increased to quickly acquire images and achieve real-time detection; in the fields of cultural relic protection and digitization, for precious cultural relics, the rotation speed can be reduced to acquire images meticulously, ensuring that the details of the cultural relics are completely recorded; when it is necessary to adjust the specific position of the object being photographed, the user energizes the first motor 21 to rotate, and the output end of the first motor 21 drives the first screw 22 to rotate. Since the outer thread of the first screw 22 is connected to the moving plate 26, the rotation of the first screw 22 causes the moving plate 26 to move in the X direction inside the fixed base 19, at which time... The user energizes the second motor 24, causing its output to drive the second screw 25 to rotate. Since the outer side of the second screw 25 is also threadedly connected to the moving plate 26, the rotation of the second screw 25 causes the moving plate 26 to move in the Y direction inside the fixed base 19. At this time, the user energizes the third motor 27 as needed, causing its output to drive the cam 28 to rotate. This allows the cam 28 to move against the placement plate 31 and the slide bar 29, thereby adjusting the height and position of the object. This allows the device to adapt to objects of various special shapes, postures, and sizes.For irregularly shaped objects or objects placed in special locations, the optimal shooting angle and distance can be found by flexibly adjusting the position of the device to complete the image acquisition task without the need for complex adjustments or handling of the object. This improves the applicability and convenience of the device. In summary, this utility model significantly improves the image acquisition quality and 3D reconstruction accuracy through structural designs such as an adjustable speed drive component and an adjustable position support component, enhancing the device's adaptability to different application scenarios. At the same time, the structural design of each component is reasonable and easy to operate, possessing high practicality and promotional value, and meeting the application requirements for a utility model patent.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An image acquisition device for three-dimensional reconstruction, comprising a connecting seat (1), a top column (2), a camera (3) and a placement disc (31), four end corners of the top of the connecting seat (1) are fixed with the top column (2), the top of the four top columns (2) is fixed with the camera (3), and the top of the connecting seat (1) is provided with the placement disc (31), characterized in that, The inner side of the connecting seat (1) is provided with a rotating structure, and the top of the rotating structure is provided with a position adjustment structure.

2. The image acquisition apparatus for three-dimensional reconstruction according to claim 1, wherein, The rotating structure includes a speed regulating mechanism and a power mechanism. One end of the inner side of the connecting seat (1) is fixed with the power mechanism, and the other end of the inner side of the connecting seat (1) is fixed with the speed regulating mechanism. The speed regulating mechanism and the power mechanism are fixed.

3. The image acquisition apparatus for three-dimensional reconstruction according to claim 2, wherein, The power mechanism includes a motor (4), a first bevel gear (5), a second bevel gear (6), a rotating rod (7), a first gear (8), a second gear (9), a fourth gear (11), a rotating column (12), a rotating shaft (17), and a turntable (18). The bottom of the inner side of the connecting seat (1) is rotatably connected to the rotating shaft (17). The top of the rotating shaft (17) is fixed to the turntable (18). One end of the bottom side of the turntable (18) is fixed to the motor (4) by a wooden board. The output end of the motor (4) is fixed to the first bevel gear (5). One of the first bevel gears (5) is... A second bevel gear (6) is connected to the side of the rotating rod (7), and a rotating rod (7) is fixed to the inner side of the second bevel gear (6). The rotating rod (7) is rotatably connected to the turntable (18). A first gear (8) is fixed to the top of the rotating rod (7). A second gear (9) is connected to one side of the first gear (8). A fourth gear (11) is connected to one side of the second gear (9). A rotating column (12) is fixed to the bottom side of the fourth gear (11). The rotating column (12) is rotatably connected to the connecting seat (1). The outer side of the rotating column (12) is slidably connected to the turntable (18).

4. The image acquisition apparatus for three-dimensional reconstruction of claim 3, wherein, The speed regulating mechanism includes a third gear (10), a concave plate (13), an electric rotary motor (14), a worm (15), and a worm wheel (16). The concave plate (13) is fixed at one end of the bottom inner side of the connecting seat (1). The worm (15) is rotatably connected to the inner side of the concave plate (13). The worm wheel (16) is fixed to the outer side of the rotating shaft (17). The worm wheel (16) and the worm (15) are meshed together. The electric rotary motor (14) is fixed at one end of the concave plate (13). The output end of the electric rotary motor (14) is fixed to the worm (15). The third gear (10) is rotatably connected to one side of the bottom of the turntable (18). The third gear (10) and the first gear (8) are meshed together.

5. The image acquisition apparatus for three-dimensional reconstruction according to claim 4, wherein, The position adjustment structure includes a fixed base (19), a first slider (20), a first motor (21), a first screw (22), a second slider (23), a second motor (24), a second screw (25), a moving plate (26), and a pushing mechanism. The top of the rotating column (12) is fixed with a fixed base (19). The two ends of the inner side of the fixed base (19) are slidably connected with first sliders (20). The two first sliders (20) are rotatably connected to the side of each other. One of the first sliders (20) is fixed with a first motor (21). The output end of the machine (21) is fixed to the first screw (22). The two sides of the inner side of the fixed base (19) are slidably connected to the second slider (23). The two second sliders (23) are rotatably connected to the side of each other. One end of one of the second sliders (23) is fixed to the second motor (24). The output end of the second motor (24) is fixed to the second screw (25). The first screw (22) and the second screw (25) are at ninety degrees to each other in the horizontal direction. The outer sides of the first screw (22) and the second screw (25) are threadedly connected to the moving plate (26).

6. The image acquisition apparatus for three-dimensional reconstruction of claim 5, wherein, The pushing mechanism includes a third motor (27), a cam (28), a slide rod (29), and a spring (30). The inner side of the top of the moving plate (26) is rotatably connected to the cam (28). One end of the moving plate (26) is fixed to the third motor (27). The output end of the third motor (27) is fixed to the cam (28). Both ends of the top of the moving plate (26) are slidably connected to the slide rod (29). The tops of the two slide rods (29) are fixed to the placement plate (31). The outer sides of the two slide rods (29) are sleeved with springs (30). The tops of the two springs (30) are fixed to the placement plate (31). The bottom sides of the two springs (30) are fixed to the moving plate (26).

7. The image acquisition apparatus for three-dimensional reconstruction of claim 3, wherein, The radii of the first gear (8), the second gear (9), the third gear (10), and the fourth gear (11) are all different.

Images