A laser 3D scanner with compensator and center positioning mechanism

Abstract

This invention belongs to the field of three-dimensional scanning and measurement technology, and particularly relates to a laser three-dimensional scanner with a compensator and a center positioning mechanism. It includes: a base, with a rotating mechanism rotatably connected to the central axis at the top of the base, and a measuring mechanism installed at the edge of the top of the base; and a positioning mechanism, with its bottom slidably connected to the top of the rotating mechanism. The positioning mechanism can perform center correction on the workpiece to be measured, ensuring that the center of the workpiece is kept consistent with the distance between the center and the measuring mechanism. By setting the positioning mechanism, this invention scans all four sides of the workpiece, enabling the device to automatically scan every surface of the workpiece and maintain the workpiece's axis at the center of the turntable throughout the scanning process. This facilitates control of the distance between the workpiece and the scanner, improves the stability of the scanning process between the scanner and the workpiece, and keeps the distance between the scanner and the workpiece controllable and stable.

Description

Technical Field

[0001] This invention belongs to the field of three-dimensional scanning and measurement technology, specifically a laser three-dimensional scanner with a compensator and a center positioning mechanism. Background Technology

[0002] A 3D laser scanning system mainly consists of a 3D laser scanner, a computer, a power supply system, a support frame, and supporting software. The 3D laser scanner, as the main component of the system, includes a laser emitter, receiver, time counter, motor-controlled rotatable filter, control circuit board, microcomputer, CCD camera, and software. It represents a technological revolution in surveying and mapping after GPS technology. It breaks through the traditional single-point measurement method, possessing unique advantages of high efficiency and high precision. 3D laser scanning technology can provide 3D point cloud data of the scanned object surface, thus enabling the acquisition of high-precision, high-resolution digital terrain models.

[0003] When scanning automotive workpieces, existing 3D laser scanners require manual operation, with the scanner held by hand and moved up and down in a circular motion around the workpiece. The distance moved each time varies, resulting in gaps in the scanned areas. Furthermore, the bottom of flat and heavy workpieces cannot be scanned directly, requiring workers to manually handle and flip them, increasing the workload and risk. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this invention is: a laser 3D scanner with a compensator and a center positioning mechanism, comprising: a base, wherein a rotating mechanism is rotatably connected to the central axis at the top of the base, and a measuring mechanism is installed at the edge of the top of the base; and a positioning mechanism, wherein the bottom of the positioning mechanism is slidably connected to the top of the rotating mechanism, and the positioning mechanism is capable of center correction of the workpiece to be measured, so that the center of the workpiece is kept consistent with the distance between the center and the measuring mechanism.

[0005] The positioning mechanism includes: a mounting groove disposed on top of the rotating mechanism; a holding component whose outer wall is rotatably connected to the inner wall of the mounting groove, the holding component being used to center and correct the workpiece to be measured; and an anti-slip component connected to the holding component by a bent rod, the anti-slip component being used to apply a squeezing force to the edge of the workpiece when it is flipped, facilitating automatic flipping and measurement of the workpiece.

[0006] Furthermore, the rotating mechanism includes: a turntable, the bottom of which is rotatably connected to the central axis at the top of the base; a first circular slide rail is provided on the top of the turntable; a second cross-shaped slide rail is provided near the center of the top of the turntable, which is installed corresponding to the mounting groove of the positioning mechanism; and a lifting platform, which is installed at the center of the turntable and can move up and down to hold the workpiece to be measured. The positioning mechanism gradually approaches the workpiece, causing it to move to the center of the lifting platform. Then, the lifting platform rises again to be level with the scanner for scanning, ensuring that the workpiece is not obstructed by external objects during the scanning process and maintaining a distance from the scanner.

[0007] Furthermore, the positioning mechanism also includes: a lifting column, which is installed on the top of the turntable, and a cylinder is provided on the top of the lifting column. One end of the cylinder is rotatably connected to the outer wall of the mounting groove; a connecting block, the bottom of which is slidably connected to the top of the turntable, and the top of which is inserted into the bottom of the mounting groove. The outer wall of the bent rod is rotatably connected to one end of the holding component, and the end of the bent rod away from the holding component is connected to the inner wall of the anti-slip component, so that the workpiece is subjected to forces from all four sides. Since the connecting block moves the same distance, the force on the workpiece is also the same, so that the workpiece can be initially moved to the middle of the lifting platform, aligning the other side of the workpiece with the scanner, so that the equipment can automatically scan each side of the workpiece, and always keep the axis of the workpiece in the center of the turntable during the scanning process. This facilitates the control of the distance between the workpiece and the scanner, improves the stability of the scanning process between the scanner and the workpiece, and keeps the distance between the scanner and the workpiece controllable and stable.

[0008] Furthermore, the measuring mechanism includes: a drive seat, which is installed at the top edge of the base, with a telescopic column on the top of the drive seat and a moving block mounted on the top of the telescopic column; and guide rods, which are symmetrically installed on the top of the drive seat, with their outer walls sleeved on the inner walls of the moving blocks. The measuring mechanism also includes: a scanner, with a lens on its surface, and a support rod rotatably connected to its outer wall, the end of the support rod furthest from the scanner being rotatably connected to the top of the moving block; and a bracket, with its bottom slidably connected to the turntable via a first slide rail, and telescopic rods symmetrically arranged on the inner wall of the bracket, the tops of which are connected to the bottom of the scanner. When the height of the scanner needs to be adjusted, the telescopic column and telescopic rods move upwards, maintaining the scanner under support from both below and behind, increasing support and shock absorption for the scanner, and making scanning more stable.

[0009] Furthermore, the holding assembly includes: a shaped frame, the outer wall of which is rotatably connected to the inner wall of the mounting slot, and the end of the shaped frame near the lifting column is rotatably connected to the bottom of the bent rod; an elastic rod, both ends of which are connected to the inner wall of the shaped frame; the holding assembly also includes: a support plate, one end of which is rotatably connected to the end of the shaped frame away from the bent rod, and a shovel plate rotatably connected to the side of the support plate away from the shaped frame, the shovel plate being used to facilitate the transfer of the object to be tested from the lifting platform to the support plate; and a buffer rod, the buffer rod being symmetrically arranged on the outer wall of the mounting slot, the top of which is slidably connected to the bottom of the support plate, clamping the workpiece from both sides, and under the action of the cylinder and the lifting column, lifting the workpiece upward and rotating it 90 degrees to face the scanner. After one side is inspected, the workpiece is rotated 90 degrees again, and the inspected side is placed on the lifting platform, and then the above operation is repeated. The workpiece is clamped on both sides, with the untested side facing the scanner. This ensures that the workpiece is positioned during the testing of each side, keeping the test surface and the scanner aligned for more accurate scanning results and reduced measurement deviations.

[0010] Furthermore, the anti-slip component includes: an air supply pipe, the outer wall of which is connected to the top of the bent rod, and a support pipe evenly distributed on the outer wall of the air supply pipe, with air holes on the surface of the support pipe; a support ring, which is installed on the support pipe; and an airbag, which is installed on the outer wall of the air supply pipe and wraps around the support ring. The airbag can inflate after air is supplied to the air supply pipe. The support ring is used to shape and support the airbag. The surface of the airbag is made of anti-slip material. When the edge of the workpiece is irregular or not smooth, the combined action of the airbag and the support ring makes it easier for the support ring to be clamped onto the inner wall of the workpiece. After the airbag is inflated, it increases the contact with the gaps in the inner wall, which can make the clamping of the workpiece surface more stable, improve the stability of the workpiece when it is erected, and facilitate the release and surface change after rapid scanning.

[0011] The beneficial effects of this invention are as follows:

[0012] 1. This invention uses a rotating mechanism to allow workers to place relatively flat workpieces to be tested directly on a lifting platform. At this time, the lifting platform is at a high position. As the lifting platform descends, the positioning mechanism gradually approaches and moves the workpiece to the center of the lifting platform. Then, the lifting platform rises again to be level with the scanner for scanning. This ensures that the workpiece is not obstructed by external objects during the scanning process and maintains a safe distance from the scanner.

[0013] 2. This invention, by setting a positioning mechanism, allows the connecting block to move along the second slide rail, bringing the holding component closer to the workpiece. This causes the workpiece to be subjected to forces from all four sides. Since the connecting block moves the same distance, the force on the workpiece is also the same, allowing the workpiece to be initially moved to the center of the lifting platform. Subsequently, the lifting platform rises and scans the workpiece from all sides, enabling the equipment to automatically scan every side of the workpiece. During the scanning process, the axis of the workpiece is always kept in the center of the turntable, facilitating control of the distance between the workpiece and the scanner, improving the stability of the scanning process between the scanner and the workpiece, and keeping the distance between the scanner and the workpiece controllable and stable.

[0014] 3. This invention incorporates an anti-slip component, which contacts the workpiece via a support ring. During inflation, the contact area with the workpiece is increased. The airbag surface is made of an anti-slip material. When the workpiece edge is irregular or not smooth, the combined action of the airbag and the support ring makes it easier for the support ring to grip the inner wall of the workpiece. Inflating the airbag increases contact with the gaps in the inner wall, making the clamping of the workpiece surface more stable, improving the stability of the workpiece when it is upright, and facilitating rapid scanning and subsequent release for surface changing.

[0015] 4. This invention, through the setting of a holding component, allows two sets of opposing mounting slots to gradually approach the workpiece to be inspected under the push of a cylinder. At this time, the shovel plate is in a vertical state and contacts the surface of the workpiece as the mounting slots gradually approach, placing the workpiece in the center of the lifting platform for scanning around its perimeter. Subsequently, the shovel plate becomes horizontal, and as the lifting platform moves downward, the surface of the workpiece gradually presses against the surfaces of the shovel plate and the support plate, driving the irregular frame to rotate, bringing the anti-slip component close to the edge of the workpiece, clamping the workpiece from both sides, and under the action of the cylinder and lifting column, lifting the workpiece upward and rotating it 90 degrees to face the scanner. After inspecting one side, the uninspected side faces the scanner, ensuring that the workpiece can be positioned once during the inspection of each side, keeping the inspection surface and the scanner in a straight line, resulting in more accurate scanning results and reducing measurement deviations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the laser 3D scanner with compensator and center positioning mechanism of the present invention;

[0017] Figure 2 This is a rear view of the present invention;

[0018] Figure 3 This is a schematic diagram of the rotating mechanism of the present invention;

[0019] Figure 4 This is a schematic diagram of the measuring mechanism of the present invention;

[0020] Figure 5 This is a partial structural schematic diagram of the positioning mechanism of the present invention;

[0021] Figure 6 This is a schematic diagram of the positioning mechanism of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the container component of the present invention;

[0023] Figure 8 This is a schematic diagram of the anti-slip component of the present invention.

[0024] In the diagram: 1. Base; 2. Rotating mechanism; 201. Turntable; 202. First slide rail; 203. Second slide rail; 204. Lifting platform; 3. Positioning mechanism; 301. Mounting slot; 302. Holding component; 3021. Irregular frame; 3022. Elastic rod; 3023. Bearing plate; 3024. Shovel plate; 3025. Buffer rod; 303. Bending rod; 304. Anti-slip component; 3041. Air supply pipe; 3042. Support pipe; 3043. Air hole; 3044. Support ring; 3045. Airbag; 305. Cylinder; 306. Lifting column; 307. Connecting block; 4. Measuring mechanism; 401. Scanner; 402. Lens; 403. Bracket; 404. Telescopic rod; 405. Moving block; 406. Telescopic column; 407. Drive seat; 408. Guide rod; 409. Support rod. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0026] Example 1, please refer to Figures 1-6 The present invention provides a technical solution: a laser 3D scanner with a compensator and a center positioning mechanism is described below.

[0027] Includes: a base 1, a rotating mechanism 2 rotatably connected to the central axis at the top of the base 1, and a measuring mechanism 4 installed at the top edge of the base 1; a positioning mechanism 3, the bottom of the positioning mechanism 3 being slidably connected to the top of the rotating mechanism 2, the positioning mechanism 3 being able to perform center correction on the workpiece to be measured, so that the center of the workpiece is kept consistent with the distance between the center of the workpiece and the measuring mechanism 4.

[0028] During operation, the operator places the workpiece to be inspected directly onto the rotating mechanism 2, and the positioning mechanism 3 moves and positions the workpiece to keep it at the center of the rotating structure. Initially, the height and angle of the measuring mechanism 4 are adjusted. After the workpiece is positioned, the rotating mechanism 2 lifts the workpiece away from the positioning mechanism 3 and begins to rotate. The built-in drive in the base 1 causes the rotating mechanism 2 to rotate, thereby aligning the side of the workpiece with the measuring mechanism 4 for scanning. After the side scan is completed, the rotating mechanism 2 lowers the workpiece, and the positioning mechanism 3 catches the workpiece, clamps it, rotates it upright, and then aligns it with the measuring mechanism 4 for scanning. This allows the equipment to automatically perform all-around scanning and measurement of the workpiece from top to bottom and around, maintaining center positioning. This ensures that the workpiece is always at the same distance from the measuring mechanism 4 before each measurement, facilitating accurate scanning results.

[0029] The rotating mechanism 2 includes: a turntable 201, the bottom of which is rotatably connected to the central axis at the top of the base 1; a first slide rail 202 is provided on the top of the turntable 201, which is circular; a second slide rail 203 is provided near the center of the top of the turntable 201, which is cross-shaped and is installed corresponding to the mounting groove 301 of the positioning mechanism 3; and a lifting platform 204, which is installed at the center of the turntable 201 and can move up and down to hold the workpiece to be tested.

[0030] In use, the worker places the relatively flat workpiece to be tested directly on the lifting platform 204. At this time, the lifting platform 204 is at a high position. Then, as the lifting platform 204 descends, the positioning mechanism 3 gradually approaches and moves the workpiece to the center of the lifting platform 204 under the action of the positioning mechanism 3. Then the lifting platform 204 rises again to be level with the scanner 401 for scanning. This ensures that the workpiece is not obstructed by external objects during the scanning process and maintains a distance from the scanner 401.

[0031] The positioning mechanism 3 includes: a mounting groove 301, which is disposed on top of the rotating mechanism 2; a holding component 302, the outer wall of which is rotatably connected to the inner wall of the mounting groove 301, and the holding component 302 is used to center and correct the workpiece to be measured; and an anti-slip component 304, which is connected to the holding component 302 by a bent rod 303, and the anti-slip component 304 is used to apply a squeezing force to the edge of the workpiece when it is flipped, so as to facilitate automatic flipping and measurement of the workpiece; the positioning mechanism 3 also includes: a lifting column 306, which is mounted on the turntable 20. At the top of the rotating disk 201, a cylinder 305 is installed on the top of the lifting column 306. One end of the cylinder 305 is rotatably connected to the outer wall of the mounting groove 301. A connecting block 307 is slidably connected to the top of the rotating disk 201. The connecting block 307 is a combination design of the slider and the lifting column 306, which can move along the second slide rail 203 and also move the mounting groove 301 up and down. When the height of the mounting groove 301 is greater than the height of the connecting block 307, the mounting groove 301 disengages from the connecting block 307, and the top of the connecting block 307 is inserted into the bottom of the mounting groove 301. The outer wall of the bent rod 303 is rotatably connected to one end of the holding component 302, and the end of the bent rod 303 away from the holding component 302 is connected to the inner wall of the anti-slip component 304.

[0032] After the worker places the workpiece to be tested on the lifting platform 204, the connecting block 307 moves along the second slide 203, causing the holding component 302 to approach the workpiece, so that the workpiece is subjected to forces from all four sides. Since the connecting block 307 moves the same distance, the forces on the workpiece are also the same, allowing the workpiece to be initially moved to the middle of the lifting platform 204. Then the lifting platform 204 rises to scan the four sides of the workpiece. When it is necessary to scan the upper and lower surfaces of the workpiece, the holding component 302 lifts the workpiece from the bottom under the action of the lifting rod and the cylinder 305. Then the anti-slip component 304 fixes the workpiece from the side, and the cylinder 305 drives... The mounting slot 301 rotates 90 degrees, exposing the other side of the workpiece to face the scanner 401. Then, the cylinder 305 drives the mounting slot 301 to rotate, causing the workpiece to rotate another 90 degrees. The inspected side is then placed on the lifting platform 204. The above operation is repeated to align the other side of the workpiece with the scanner 401, enabling the equipment to automatically scan each side of the workpiece. During the scanning process, the axis of the workpiece is always kept in the center of the turntable 201, which facilitates the control of the distance between the workpiece and the scanner 401, improves the stability of the scanning process between the scanner 401 and the workpiece, and keeps the distance between the scanner 401 and the workpiece controllable and stable.

[0033] The measuring mechanism 4 includes: a drive base 407, which is mounted on the top edge of the base 1, with a telescopic column 406 on the top of the drive base 407 and a moving block 405 mounted on the top of the telescopic column 406; a guide rod 408, which is symmetrically mounted on the top of the drive base 407, with its outer wall sleeved with the inner wall of the moving block 405. The measuring mechanism 4 also includes: a scanner 401, with a lens 402 on its surface, a support rod 409 rotatably connected to the outer wall of the scanner 401, and one end of the support rod 409 away from the scanner 401 rotatably connected to the top of the moving block 405; and a bracket 403, whose bottom is slidably connected to the turntable 201 via a first slide rail 202, with telescopic rods 404 symmetrically arranged on the inner wall of the bracket 403, and the top of the telescopic rods 404 connected to the bottom of the scanner 401.

[0034] When the workpiece to be inspected is large and difficult to move, the turntable 201 rotates. At this time, the drive seat 407 and the bracket 403 drive the scanner 401 to move along the first slide rail 202 on the turntable 201. The bracket 403 and the telescopic rod 404 keep the scanner 401 at the same relative height as the turntable 201. When it is necessary to adjust the height of the scanner 401, the telescopic column 406 and the telescopic rod 404 move upward to keep the scanner 401 supported by both the bottom and the back, increasing the support and shock absorption of the scanner 401, making the scanning more stable.

[0035] Example 2, please refer to Figures 1-8 The present invention provides a technical solution: Based on embodiment 1, the holding component 302 includes: a shaped frame 3021, the shaped frame 3021 being made of rigid material, the outer wall of the shaped frame 3021 being rotatably connected to the inner wall of the mounting groove 301, and one end of the shaped frame 3021 near the lifting column 306 being rotatably connected to the bottom of the bent rod 303; an elastic rod 3022, both ends of the elastic rod 3022 being connected to the inner wall of the shaped frame 3021; ​​the holding component 302 also includes: a support plate 3023. One end of the support plate 3023 is rotatably connected to the end of the irregular frame 3021 away from the bent rod 303. A shovel plate 3024 is rotatably connected to the side of the support plate 3023 away from the irregular frame 3021. The shovel plate 3024 is used to facilitate the transfer of the object to be measured from the lifting platform 204 to the support plate 3023. The buffer rod 3025 is elastic and is symmetrically arranged on the outer wall of the mounting groove 301. The top of the buffer rod 3025 is slidably connected to the bottom of the support plate 3023.

[0036] After the workpiece to be inspected is placed on the lifting platform 204, the two opposing sets of mounting slots 301 gradually approach the workpiece under the push of the cylinder 305. At this time, the shovel plate 3024 is in a vertical state. As the mounting slots 301 gradually approach, they contact the surface of the workpiece, placing the workpiece in the middle of the lifting platform 204. After scanning all four sides of the workpiece, the lifting platform 204 lowers the workpiece, and the mounting slots 301 approach the workpiece again. At this time, the shovel plate 3024 is horizontal. As the lifting platform 204 moves downward, the surface of the workpiece gradually presses against the surfaces of the shovel plate 3024 and the bearing plate 3023, and moves the workpiece... The frame 3021 rotates, bringing the anti-slip component 304 close to the edge of the workpiece, clamping the workpiece from both sides. Under the action of the cylinder 305 and the lifting column 306, the workpiece is lifted upward and rotated 90 degrees to face the scanner 401. After one side is inspected, the workpiece is rotated 90 degrees again, and the inspected side is placed on the lifting platform 204. The above operation is then repeated so that both sides of the workpiece are clamped again, and the uninspected side faces the scanner 401. This ensures that the workpiece can be positioned once during the inspection of each side, keeping the inspection surface and the scanner 401 in a straight line, resulting in more accurate scanning results and reduced measurement deviations.

[0037] The anti-slip component 304 includes: an air supply pipe 3041, the outer wall of which is connected to the top of the bent rod 303, and support pipes 3042 are evenly arranged on the outer wall of the air supply pipe 3041, with air holes 3043 on the surface of the support pipes 3042; a support ring 3044, which is installed on the support pipes 3042; and an airbag 3045, which is installed on the outer wall of the air supply pipe 3041 and wraps around the support ring 3044. After air is supplied to the air supply pipe 3041, the airbag 3045 can inflate, and the support ring 3044 is used to shape and support the airbag 3045.

[0038] During use, the airbag 3045 is inflated by an air pump connected to the air supply pipe 3041. The gas enters the support pipe 3042 through the air supply pipe 3041 and then enters the airbag 3045 through the air holes 3043 on the surface of the support pipe 3042. The air supply pipe 3041 and the support pipe 3042 are rigid pipes, and the support ring 3044 is a rubber ring. When it is necessary to clamp the edge of the workpiece, the bent rod 303 rotates to make the airbag 3045 contact the surface of the workpiece. At this time, the airbag 3045 is not inflated. The support ring 3044 contacts the workpiece, and the contact area with the workpiece is increased during the inflation process. The surface of the airbag 3045 is made of non-slip material. When the edge of the workpiece is irregular or not smooth, the combined action of the airbag 3045 and the support ring 3044 makes it easier for the support ring 3044 to be stuck on the inner wall of the workpiece. After the airbag 3045 is inflated, it increases the contact with the gap of the inner wall, which can make the clamping of the workpiece surface more powerful, improve the stability of the workpiece when it is upright, and facilitate the release and surface change after rapid scanning.

[0039] The specific workflow is as follows:

[0040] During operation, the worker places the workpiece to be inspected directly onto the lifting platform 204. After the worker places the workpiece on the lifting platform 204, the connecting block 307 moves along the second slide rail 203, causing the holding component 302 to move closer to the workpiece, so that the workpiece is subjected to forces from all four sides. Since the connecting block 307 moves the same distance, the forces on the workpiece are also the same, allowing the workpiece to be initially moved to the center of the lifting platform 204. Subsequently, the lifting platform 204 rises to scan the four sides of the workpiece. When it is necessary to scan the upper and lower surfaces of the workpiece... Driven by the lifting rod and cylinder 305, the holding component 302 lifts the workpiece from the bottom. Then, the anti-slip component 304 fixes the workpiece from the side. The cylinder 305 drives the mounting groove 301 to rotate 90 degrees, exposing the other side of the workpiece to face the scanner 401. Then, the cylinder 305 drives the mounting groove 301 to rotate, causing the workpiece to rotate 90 degrees again, placing the inspected side on the lifting platform 204. Then, the above operation is repeated to align the other side of the workpiece with the scanner 401, so that the equipment can automatically scan every side of the workpiece.

[0041] Initially, the height and angle of the measuring mechanism 4 are adjusted. The scanner 401 is kept at the same relative height as the turntable 201 by the bracket 403 and the telescopic rod 404. When the height of the scanner 401 needs to be adjusted, the telescopic column 406 and the telescopic rod 404 move upward to keep the scanner 401 supported by the forces from below and the back. After the workpiece is positioned, the rotating mechanism 2 drives the workpiece to rise and disengage from the positioning mechanism 3 and begins to rotate. The built-in drive of the base 1 causes the rotating mechanism 2 to rotate, thereby aligning the side of the workpiece with the measuring mechanism 4 and scanning it. After all scanning is completed, the workpiece is removed.

[0042] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A laser three-dimensional scanner with compensator belt center positioning mechanism, characterized in that it comprises: a base (1), a rotating mechanism (2) rotatably connected to the middle axis of the top of the base (1), and a measuring mechanism (4) installed at the edge of the top of the base (1); a positioning mechanism (3) slidably connected to the top of the rotating mechanism (2), capable of centering the workpiece to be measured, so that the distance between the center of the workpiece and the measuring mechanism (4) remains consistent; the positioning mechanism (3) comprises: an installation slot (301) provided on the top of the rotating mechanism (2); a containing assembly (302) rotatably connected to the inner wall of the installation slot (301), used for centering the workpiece to be measured; an anti-skid assembly (304) connected to the containing assembly (302) through a bent rod (303), used for applying extrusion force to the edge of the workpiece when the workpiece is flipped, facilitating automatic flipping measurement of the workpiece; the anti-skid assembly (304) comprises: a gas conveying pipe (3041) connected to the top of the bent rod (303), the outer wall of the gas conveying pipe (3041) is uniformly provided with a support pipe (3042), the surface of the support pipe (3042) is provided with a gas hole (3043); a support ring (3044) installed on the support pipe (3042); and a gas bag (3045) installed on the outer wall of the gas conveying pipe (3041) to wrap the support ring (3044), which can be inflated after the gas conveying pipe (3041) is supplied with gas, and the support ring (3044) is used for shaping and supporting the gas bag (3045); the rotating mechanism (2) comprises: a turntable (201) rotatably connected to the middle axis of the top of the base (1), the top of the turntable (201) is provided with a first slide (202), which is circular, the top of the turntable (201) is provided with a second slide (203) near the center, which is cross-shaped and corresponds to the installation slot (301) of the positioning mechanism (3); and a lifting platform (204) installed at the center of the turntable (201), which can move up and down to contain the workpiece to be measured; the positioning mechanism (3) further comprises: a lifting column (306) installed on the top of the turntable (201), the top of the lifting column (306) is provided with a gas cylinder (305), one end of the gas cylinder (305) is rotatably connected to the outer wall of the installation slot (301). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The laser 3-D scanner with compensator tape center positioning mechanism according to claim 1, characterized in that: ​ ​ ​ 3. The laser three-dimensional scanner with compensator belt center positioning mechanism according to claim 2, characterized in that: ​ ​ The bottom of the connecting block (307) is in sliding connection with the top of the rotating disc (201), and the top of the connecting block (307) is in plug connection with the bottom of the mounting groove (301).

4. The laser 3-D scanner with compensator belt center positioning mechanism according to claim 3, characterized in that: The outer wall of the bent rod (303) is in rotary connection with one end of the containing assembly (302), and the end of the bent rod (303) away from the containing assembly (302) is connected with the inner wall of the anti-skid assembly (304).

5. The laser 3-D scanner with compensator belt center positioning mechanism according to claim 4, characterized in that: The measuring mechanism (4) comprises: The driving seat (407) is installed at the edge of the top of the base (1), the top of the driving seat (407) is provided with the telescopic column (406), and the top of the telescopic column (406) is provided with the moving block (405); The guide rod (408) is symmetrically installed at the top of the driving seat (407), and the outer wall of the guide rod (408) is in sleeve connection with the inner wall of the moving block (405).

6. The laser 3-D scanner with compensator belt center positioning mechanism according to claim 5, characterized in that: The measuring mechanism (4) further comprises: The surface of the scanner (401) is provided with the lens (402), the outer wall of the scanner (401) is in rotary connection with the supporting rod (409), one end of the supporting rod (409) away from the scanner (401) is in rotary connection with the top of the moving block (405), and the bottom of the supporting rod (409) is in rotary connection with the top of the telescopic column (406). The bottom of the bracket (403) is in sliding connection with the rotating disc (201) through the first sliding way (202), the inner wall of the bracket (403) is symmetrically provided with the telescopic rod (404), and the top of the telescopic rod (404) is connected with the bottom of the scanner (401).

7. The laser 3-D scanner with compensator belt center positioning mechanism according to claim 4, characterized in that: The containing assembly (302) comprises: The outer wall of the special-shaped frame (3021) is in rotary connection with the inner wall of the mounting groove (301), and one end of the special-shaped frame (3021) close to the lifting column (306) is in rotary connection with the bottom of the bent rod (303); The elastic rod (3022) is connected with the inner wall of the special-shaped frame (3021) at both ends.

8. The laser 3-D scanner with compensator belt center positioning mechanism according to claim 7, characterized in that: The containing assembly (302) further comprises: One end of the bearing plate (3023) is in rotary connection with the end of the special-shaped frame (3021) away from the bent rod (303), one side of the bearing plate (3023) away from the special-shaped frame (3021) is in rotary connection with the shovel plate (3024), and the shovel plate (3024) is used for conveniently transferring the object to be measured from the lifting platform (204) to the bearing plate (3023); The buffer rod (3025) is symmetrically arranged on the outer wall of the mounting groove (301), and the top of the buffer rod (3025) is in sliding connection with the bottom of the bearing plate (3023).

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