Scanning device for three-dimensional model information acquisition

Abstract

The utility model discloses a scanning device for three-dimensional model information acquisition, and relates to the technical field of three-dimensional scanning, and the scanning device comprises a mainframe box which is internally provided with a lifting driving unit; the lower sliding column is inserted into the mainframe box, and a lower sliding groove is formed in the side face; the upper sliding column is rotationally connected to the upper end of the lower sliding column, an upper sliding groove is formed in the side face of the upper sliding column, and the upper sliding groove communicates with the lower sliding groove; a lower movable groove is formed in the lower sliding column; an upper movable groove is formed in the upper sliding column, the lower movable groove and the upper movable groove form an annular sliding groove, and an annular chain is wound in the annular sliding groove; the lifting driving unit drives the chain to move in the annular sliding groove. The sliding rod is inserted into the lower sliding groove and connected with the chain, and a scanning unit is arranged at the tail end. The sliding column on the mainframe box is divided into the lower sliding column and the upper sliding column, and the upper sliding column can rotate by 90 degrees, so that the scanning unit can scan a large target and a small target in different postures, and the scanning requirements of various different targets are met.

Description

Technical Field

[0001] This application relates to the field of 3D scanning technology, and in particular to a scanning device for acquiring 3D model information. Background Technology

[0002] In the process of creating a virtual studio, 3D scanning devices are often used to perform 3D scanning and modeling of existing physical studios in order to create a virtual studio with realistic effects.

[0003] Traditional 3D scanning methods primarily rely on handheld scanners, which move with the operator and upload the acquired 3D point cloud data to a host computer. However, handheld scanners are prone to shaking and cannot perform 3D scanning of the target from all directions, resulting in unsatisfactory performance. To address this issue, CN222687756U and CN222702935U provide ground-based scanning devices. These two patents offer devices capable of 3D scanning indoors and small, movable targets, respectively, and their ground-based placement improves the accuracy of 3D point cloud acquisition.

[0004] However, studios are different from the two types of objects mentioned above. Studios contain both fixed objects, such as walls and large equipment, and movable small targets, such as decorations on a table. The scanning devices provided by existing patents cannot simultaneously meet the scanning needs of both types of objects. Utility Model Content

[0005] This application provides a scanning device for acquiring 3D model information, which solves the problem that existing scanning devices cannot simultaneously meet the 3D scanning needs of both fixed objects and small movable objects.

[0006] This application provides a scanning device for acquiring three-dimensional model information, comprising:

[0007] The main unit is equipped with a lifting drive unit inside;

[0008] The mounting plate is horizontally mounted on the outer side of the main unit chassis, and a turntable is rotatably mounted at the top end of the mounting plate.

[0009] The sliding column is inserted into the host chassis, and the side of the sliding column has a vertical sliding groove.

[0010] The upper sliding column is connected to the upper end of the lower sliding column by a hinge. When the upper sliding column is rotated to the horizontal position, it is directly above the turntable. The upper sliding column has an upper sliding groove on its side, which is connected to the lower sliding groove.

[0011] The lower sliding column has a U-shaped lower movable groove inside, and a chain slides inside the lower movable groove. The lower movable groove is connected to the lower sliding groove. The upper sliding column has an N-shaped upper movable groove inside. The chain extends from the lower movable groove and inserts into the upper movable groove. The lower movable groove and the upper movable groove form an annular sliding groove. The annular chain is wound around the annular sliding groove. The upper movable groove is connected to the upper sliding groove. The lifting drive unit drives the chain to move in the annular sliding groove.

[0012] The slide bar has one end inserted into the lower groove and connected to the chain, and the other end of the slide bar is equipped with a scanning unit.

[0013] In one possible implementation, a drive bevel gear is coaxially mounted on the shaft of the lifting drive unit, and a mounting hole is provided on the side wall of the main unit where the sliding column is inserted. A driven gear is rotatably mounted in the mounting hole, with one end of the driven gear meshing with the drive bevel gear and the other end inserted into the chain.

[0014] In one possible implementation, the driven gear comprises two parts: bevel teeth and cylindrical teeth. The bevel teeth have a conical structure, and the cylindrical teeth have a cylindrical structure. The bevel teeth mesh with the driving bevel gear, and the cylindrical teeth are inserted into the chain.

[0015] In one possible implementation, a tensioning wheel is also provided in the lower movable groove. The tensioning wheel is rotatably mounted on a rotating rod, the end of which is rotatably connected to the inner wall of the lower movable groove. A torsion spring is provided at the connection between the rotating rod and the lower movable groove, and the torsion spring provides the tensioning wheel with elastic force to tighten the chain.

[0016] In one possible implementation, the top surface of the sliding column has an arc-shaped lower guide plate near the lower movable groove. The lower guide plate is centered on the axis of the hinge. The bottom surface of the upper sliding column has an upper slot corresponding to the lower guide plate. When the upper sliding column rotates to the vertical position, the lower guide plate is inserted into the upper slot.

[0017] In one possible implementation, the bottom surface of the upper sliding column is provided with an arc-shaped upper guide plate near the upper sliding groove. The upper guide plate is centered on the axis of the hinge. The bottom surface of the lower sliding column is provided with a lower slot at a position corresponding to the upper guide plate. When the upper sliding column rotates to the vertical position, the upper guide plate is inserted into the lower slot.

[0018] In one possible implementation, the curvature of the upper guide plate is greater than that of the lower guide plate, and when the upper slide column rotates to the horizontal position, the outer surface of the upper guide plate slides in contact with the inner surface of the lower guide plate.

[0019] In one possible implementation, a rotary drive unit is provided on the bottom surface of the mounting plate, and the rotating shaft of the rotary drive unit is connected to the turntable.

[0020] In one possible implementation, wheels are provided on the bottom of the main unit chassis.

[0021] In one possible implementation, a handle is provided on the top surface of the main unit chassis at the end away from the sliding column.

[0022] The scanning device for acquiring 3D model information disclosed in this application has the following advantages:

[0023] The sliding column on the main unit is divided into two parts: the lower sliding column and the upper sliding column. The upper sliding column can rotate 90 degrees relative to the lower sliding column, so that the scanning unit can scan large targets at higher positions in a vertical state during the lifting and lowering process, and can also scan small targets below in a horizontal state, adapting to the scanning needs of various targets and improving the information acquisition efficiency of the 3D model. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of a scanning device for acquiring three-dimensional model information, provided in an embodiment of this application, in an upright state.

[0026] Figure 2 This is a schematic diagram of the internal structure of a scanning device for acquiring three-dimensional model information, provided in an embodiment of this application, in an upright state.

[0027] Figure 3 This is a schematic diagram of the driven gear provided in an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the internal structure of a scanning device for acquiring three-dimensional model information in a bent state, as provided in an embodiment of this application.

[0029] Figure 5 for Figure 4 An enlarged schematic diagram of region A in the middle.

[0030] Figure 6 This is a schematic diagram of a scanning device for acquiring three-dimensional model information in a bent state, showing the acquisition unit passing through a transition position.

[0031] Figure 7 This is a schematic diagram of a scanning device for acquiring three-dimensional model information, provided in an embodiment of this application, with the acquisition unit in a horizontal position when bent.

[0032] Reference numerals: 100, Main unit; 101, Lifting drive unit; 102, Battery; 103, Bevel gear; 104, Column gear; 110, Mounting plate; 120, Turntable; 130, Rotation drive unit; 140, Handle; 210, Sliding column; 211, Sliding groove; 212, Lower movable groove; 220, Upper sliding column; 221, Upper sliding groove; 222, Upper movable groove; 230, Slide bar; 231, Scanning unit; 240, Hinge; 250, Chain; 260, Tensioner wheel; 270, Dustproof film; 280, Lower guide plate; 281, Lower slot; 290, Upper guide plate; 291, Upper slot; 300, Traveling wheel. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] Figure 1-7 This is a schematic diagram of a scanning device for acquiring three-dimensional model information, provided as an embodiment of this application. This application provides a scanning device for acquiring three-dimensional model information, comprising:

[0035] The main unit 100 has a lifting drive unit 101 installed inside;

[0036] Mounting plate 110 is horizontally set on the outer side of main unit chassis 100, and a turntable 120 is rotatably set at the top end of mounting plate 110.

[0037] The sliding column 210 is inserted into the main unit chassis 100, and the side of the sliding column 210 is provided with a vertical sliding groove 211.

[0038] The upper sliding column 220 is rotatably connected to the upper end of the lower sliding column 210 via a hinge 240. When the upper sliding column 220 rotates to the horizontal position, it is directly above the turntable 120. The upper sliding column 220 has an upper sliding groove 221 on its side, which is connected to the lower sliding groove 211.

[0039] The lower sliding column 210 has a U-shaped lower movable groove 212 inside, and a chain 250 is slidably disposed inside the lower movable groove 212. The lower movable groove 212 is connected to the lower sliding groove 211. The upper sliding column 220 has an N-shaped upper movable groove 222 inside. The chain 250 extends from the lower movable groove 212 and inserts into the upper movable groove 222. The lower movable groove 212 and the upper movable groove 222 form an annular slide groove. The annular chain 250 is wound around the annular slide groove. The upper movable groove 222 is connected to the upper slide groove 221. The lifting drive unit 101 drives the chain 250 to move in the annular slide groove.

[0040] The slide bar 230 has one end inserted into the lower groove 211 and connected to the chain 250, and the other end of the slide bar 230 is provided with a scanning unit 231.

[0041] For example, the main unit 100 is a hollow cubic structure. The mounting plate 110 can be installed on the outer side of the main unit 100 by means of fixed connection or rotational connection. If the rotational connection is used, it is preferred to rotate upward so that the entire scanning device can be retracted upward when not in use, thereby reducing the space occupied.

[0042] In the embodiments of this application, a rotary drive unit 130 is provided on the bottom surface of the mounting plate 110, and the rotating shaft of the rotary drive unit 130 is connected to the turntable 120. Specifically, the rotary drive unit 130 is a motor, the main body of which is fixedly connected to the bottom surface of the mounting plate 110 by bolts, while the rotating shaft passes through the mounting plate 110 and connects to the turntable 120. When scanning a small target, the upper sliding column 220 can be rotated to a horizontal position. After the lifting drive unit 101 drives the chain 250 to move, the scanning unit 231 will move along the lower sliding groove 211 and the upper sliding groove 221 to a horizontal position. At this time, the scanning unit 231 will face the turntable 120, and then the small target to be scanned will be placed on the turntable 120. The turntable 120 rotates a certain angle each time under the drive of the rotary drive unit 130. When the rotation stops, the scanning unit 231 will perform a three-dimensional scan of the small target.

[0043] Furthermore, the bottom of the main unit 100 is provided with a traveling wheel 300. Specifically, the traveling wheel 300 can be a directional wheel or a swivel wheel. In order to facilitate pushing the scanning device, this embodiment of the application also provides a handle 140 on the top surface of the main unit 100 at the end away from the sliding column 210. The scanning device can be pushed to any desired position by the handle 140, and then the three-dimensional scanning of large or small targets can be started.

[0044] After the sliding column 210 is inserted into the main unit 100, the side with the sliding groove 211 will be flush with the outer side of the main unit 100. After the upper sliding column 220 is rotated to the vertical position, its sides will also be flush with the corresponding sides of the sliding column 210, so that the sliding column 210 and the upper sliding column 220 form a whole.

[0045] In the embodiments of this application, the sliding column 210 has multiple magnet blocks embedded in its top surface, while the upper sliding column 220 also has ferromagnetic metal blocks embedded in its corresponding positions. When the upper sliding column 220 rotates to the vertical position, the attraction between the magnet blocks and the metal blocks will keep the upper sliding column 220 stable, preventing it from rotating due to accidents.

[0046] The chain 250 mentioned in this embodiment is a ring structure formed by connecting multiple short, rectangular metal frame structures end to end with pins. The teeth on the lifting drive unit 101 will be inserted into the rectangular metal frame. Therefore, when the lifting drive unit 101 rotates, the teeth on the lifting drive unit 101 will be inserted into the metal frame on the chain 250 in sequence, causing the chain 250 to move.

[0047] In the embodiments of this application, the lower movable groove 212 has an opening at the top of the lower sliding column 210, and the upper movable groove 222 also has an opening at the bottom of the upper sliding column 220. These two openings are the same size and corresponding in position. When the upper sliding column 220 rotates to the vertical position, the openings of the lower movable groove 212 and the upper movable groove 222 will align, connecting the two movable grooves to form an annular groove. When the upper sliding column 220 rotates to the horizontal position, although the annular groove is destroyed, the chain 250 still passes through the two movable grooves. Moreover, as long as the length of the chain 250 is appropriate, the chain 250 will be tightened when the upper sliding column 220 rotates to the horizontal position, thereby keeping the upper sliding column 220 stably in the horizontal position without needing to maintain stability under the action of other external forces.

[0048] When the upper sliding column 220 rotates to the vertical position, the upper sliding groove 221 and the upper movable groove 222 will be connected to the lower sliding groove 211 and the lower movable groove 212 respectively. Therefore, the scanning unit 231 can also move vertically upward to the upper sliding column 220. Compared with the lower sliding column 210, the upper sliding column 220 has a higher field of view, so it can perform three-dimensional scanning on taller and larger targets.

[0049] In one possible embodiment, a drive bevel gear is coaxially arranged on the shaft of the lifting drive unit 101, and a mounting hole is provided on the side wall of the main unit housing 100 where the lower column 210 is inserted. A driven gear is rotatably arranged in the mounting hole, with one end of the driven gear meshing with the drive bevel gear and the other end inserted into the chain 250.

[0050] For example, the lifting drive unit 101 also uses a motor, the main body of which is fixedly installed inside the main housing 100, while the drive bevel gear is installed on the rotating shaft of the lifting drive unit 101. The driven gear has pins at both ends of its axial direction, and the two pins are respectively inserted into the holes on the two opposite sides of the mounting hole, so that the driven gear can rotate freely on the sliding column 210.

[0051] Furthermore, the driven gear includes two parts: bevel teeth 103 and cylindrical teeth 104. The bevel teeth 103 have a conical structure, and the cylindrical teeth 104 have a cylindrical structure. The bevel teeth 103 mesh with the driving bevel gear, and the cylindrical teeth 104 are inserted into the chain 250.

[0052] In one possible embodiment, a tensioning wheel 260 is also provided in the lower movable groove 212. The tensioning wheel 260 is rotatably mounted on a rotating rod. The end of the rotating rod is rotatably connected to the inner side wall of the lower movable groove 212. A torsion spring is provided at the position where the rotating rod connects to the lower movable groove 212. The torsion spring provides the tensioning wheel 260 with the elastic force to tighten the chain 250.

[0053] For example, when the upper slide column 220 rotates to the horizontal position, the chain 250 will be pulled out to maintain the horizontal state of the upper slide column 220. When the upper slide column 220 rotates to the vertical position, this part of the pulled-out chain 250 will return to the lower movable groove 212 inside the lower slide column 210. If this part of the chain 250 is not tightened, it will be in a slack state in the lower movable groove 212, which may cause the chain 250 and the driven gear to disengage.

[0054] To avoid this situation, the embodiments of this application provide a tension wheel 260. Under the elastic force of the torsion spring, the tension wheel 260 can always apply tension to the chain 250, so that the chain 250 is always in a taut state.

[0055] Furthermore, since a portion of the chain 250 will be outside the lower movable groove 212 and the upper movable groove 222 when the upper sliding column 220 rotates to the horizontal position, dust and other debris are easily attracted to the chain 250, posing a safety threat to the operator. Therefore, in this embodiment, a dustproof membrane 270 is connected to the top of the lower sliding column 210 and the bottom of the upper sliding column 220. The dustproof membrane 270 can be made of a material with a certain elasticity, such as rubber or silicone, so that the dustproof membrane 270 can be stretched to a certain length when the upper sliding column 220 rotates to the horizontal position, and can return to its original length when the upper sliding column 220 rotates to the vertical position. This prevents the original length of the dustproof membrane 270 from causing excessive wrinkles on the lower sliding column 210, thus improving the aesthetics of the device.

[0056] In one possible embodiment, the top surface of the sliding column 210 is provided with an arc-shaped lower guide plate 280 at a position near the lower sliding groove 211 in the lower movable groove 212. The lower guide plate 280 is centered on the axis of the hinge 240. The bottom surface of the upper sliding column 220 is provided with an upper slot 291 at a position corresponding to the lower guide plate 280. When the upper sliding column 220 rotates to the vertical position, the lower guide plate 280 is inserted into the upper slot 291.

[0057] For example, the bottom surface of the upper sliding column 220 is provided with an arc-shaped upper guide plate 290 at the position of the upper movable groove 222 near the upper sliding groove 221. The upper guide plate 290 is centered on the axis of the hinge 240. The bottom surface of the lower sliding column 210 is provided with a lower slot 281 at the position corresponding to the upper guide plate 290. When the upper sliding column 220 rotates to the vertical position, the upper guide plate 290 is inserted into the lower slot 281.

[0058] Furthermore, the curvature of the upper guide plate 290 is greater than that of the lower guide plate 280. When the upper sliding column 220 rotates to the horizontal position, the outer side of the upper guide plate 290 slides in contact with the inner side of the lower guide plate 280.

[0059] With the lower guide plate 280 and upper guide plate 290 installed, a smooth transition is formed between the inner sides of the lower movable groove 212 and the upper movable groove 222. Therefore, the chain 250 can move smoothly at this transition point without jamming due to excessive angles. The same structure can also be installed on the outer sides of the lower movable groove 212 and the upper movable groove 222 to allow the chain 250 to move smoothly both inside and outside these grooves. However, since the outer side moves a longer distance during rotation than the inner side, and due to limitations in the length of the slots that can be accommodated in the lower sliding column 210 and the upper sliding column 220, the guide plates cannot contact each other as they do on the inner side when the guide plates and slots are installed on the outer side. Nevertheless, this combination of guide plates and slots still provides a certain guiding effect.

[0060] In this embodiment of the scanning device, the host computer is placed on the main unit 100 and connected to the scanning unit 231 via a data cable. The device is pushed to the desired scanning position using the handle 140 and the wheels 300. If the target is large, the upper sliding column 220 is kept in a vertical position, and the lifting drive unit 101 is activated. With power supplied by the battery 102 inside the main unit 100, the scanning unit 231 moves from bottom to top, performing a three-dimensional scan of the target. The obtained three-dimensional point cloud data is stored in the host computer. If the target is small, it can be placed on the turntable 120, and the upper sliding column 220 is rotated 90 degrees to a horizontal position. Then, the lifting drive unit 101 and the rotation drive unit 130 are activated. While the target rotates, the scanning unit 231 gradually moves from bottom to top, and after reaching the top of the lower sliding column 210, it continues to move horizontally. During this movement, the scanning unit 231 performs a three-dimensional scan of the target, and the obtained three-dimensional point cloud data is also stored in the host computer.

[0061] It should be understood that, in order to prevent the chain 250 from sliding out of the upper slide groove 221 and the lower slide groove 211, in this embodiment, the upper movable groove 222 and the lower movable groove 212 have the same width, and this width is greater than the width of the upper slide groove 221 and the lower slide groove 211, while the width of the chain 250 is also greater than the width of the upper slide groove 221 and the lower slide groove 211. Furthermore, the upper guide plate 290 and the lower guide plate 280 also need to have a groove with the same width as the upper slide groove 221 and the lower slide groove 211 in the center, so that the slide rod 230 can move smoothly.

[0062] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0063] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A scanning device for acquiring information from three-dimensional models, characterized in that, include: The main unit (100) is equipped with a lifting drive unit (101) inside; Mounting plate (110) is horizontally arranged on the outer side of the main unit chassis (100), and a turntable (120) is rotatably arranged at the top end of the mounting plate (110); A sliding column (210) is inserted into the main unit (100), and a vertical sliding groove (211) is provided on the side of the sliding column (210). The upper sliding column (220) is rotatably connected to the upper end of the lower sliding column (210) via a hinge (240). When the upper sliding column (220) is rotated to a horizontal position, it is directly above the turntable (120). The upper sliding column (220) has an upper sliding groove (221) on its side, and the upper sliding groove (221) is connected to the lower sliding groove (211). The lower sliding column (210) has a U-shaped lower movable groove (212) inside, and a chain (250) is slidably disposed inside the lower movable groove (212). The lower movable groove (212) is connected to the lower sliding groove (211). The upper sliding column (220) has an n-shaped upper movable groove (222) inside. The chain (250) extends out of the lower movable groove (212) and inserts into the upper movable groove (222). The lower movable groove (212) and the upper movable groove (222) form an annular sliding groove. The annular chain (250) is wound around the annular sliding groove. The upper movable groove (222) is connected to the upper sliding groove (221). The lifting drive unit (101) drives the chain (250) to move in the annular sliding groove. A slide bar (230) is inserted into the lower groove (211) and connected to the chain (250) at one end, and a scanning unit (231) is provided at the other end of the slide bar (230).

2. The scanning device for acquiring three-dimensional model information according to claim 1, characterized in that, The lifting drive unit (101) has a drive bevel gear coaxially mounted on its rotating shaft. The sliding column (210) is inserted into the side wall of the main unit (100) and has a mounting hole. A driven gear is rotatably mounted in the mounting hole. One end of the driven gear meshes with the drive bevel gear, and the other end is inserted into the chain (250).

3. A scanning device for acquiring three-dimensional model information according to claim 2, characterized in that, The driven gear includes two parts: a bevel tooth (103) and a cylindrical tooth (104). The bevel tooth (103) has a conical structure, and the cylindrical tooth (104) has a cylindrical structure. The bevel tooth (103) meshes with the driving bevel gear, and the cylindrical tooth (104) is inserted into the chain (250).

4. A scanning device for acquiring three-dimensional model information according to claim 1, characterized in that, The lower movable groove (212) is also provided with a tension wheel (260), which is rotatably mounted on a rotating rod. The end of the rotating rod is rotatably connected to the inner wall of the lower movable groove (212). A torsion spring is provided at the position where the rotating rod connects to the lower movable groove (212). The torsion spring provides the tension wheel (260) with elastic force to tighten the chain (250).

5. A scanning device for acquiring three-dimensional model information according to claim 1, characterized in that, The top surface of the sliding column (210) is provided with an arc-shaped lower guide plate (280) near the lower sliding groove (211) in the lower movable groove (212). The lower guide plate (280) is centered on the axis of the hinge (240). The bottom surface of the upper sliding column (220) is provided with an upper slot (291) at a position corresponding to the lower guide plate (280). When the upper sliding column (220) rotates to the vertical position, the lower guide plate (280) is inserted into the upper slot (291).

6. A scanning device for acquiring three-dimensional model information according to claim 5, characterized in that, The bottom surface of the upper sliding column (220) is provided with an arc-shaped upper guide plate (290) near the upper sliding groove (221) in the upper movable groove (222). The upper guide plate (290) is centered on the axis of the hinge (240). The bottom surface of the lower sliding column (210) is provided with a lower slot (281) at a position corresponding to the upper guide plate (290). When the upper sliding column (220) rotates to the vertical position, the upper guide plate (290) is inserted into the lower slot (281).

7. A scanning device for acquiring three-dimensional model information according to claim 6, characterized in that, The curvature of the upper guide plate (290) is greater than that of the lower guide plate (280). When the upper sliding column (220) rotates to the horizontal position, the outer side of the upper guide plate (290) slides in contact with the inner side of the lower guide plate (280).

8. A scanning device for acquiring three-dimensional model information according to claim 1, characterized in that, The bottom surface of the mounting plate (110) is provided with a rotary drive unit (130), and the rotating shaft of the rotary drive unit (130) is connected to the turntable (120).

9. A scanning device for acquiring three-dimensional model information according to claim 1, characterized in that, The outer bottom of the main unit (100) is provided with wheels (300).

10. A scanning device for acquiring three-dimensional model information according to claim 1, characterized in that, The top surface of the main unit (100) is provided with a handle (140) at the end away from the sliding column (210).

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