Damping platform for evaluating straightness of 3D laser contourgraph and evaluating device

Abstract

The utility model relates to a damping platform for evaluating the straightness of a 3D laser contourgraph and an evaluation device. The damping platform comprises a damping base, a sound insulation cover and a damping ring, the damping base is used for placing the 3D laser contourgraph, the damping base is provided with a damping structure, and the damping structure is used for providing damping so as to relieve or prevent external vibration from being transmitted to the 3D laser contourgraph through a solid medium; the sound insulation cover covers the damping platform and is used for reducing or preventing external vibration from being transmitted to the 3D laser contourgraph through air; and the damping ring is arranged between the damping base and the sound insulation cover, is bonded with the damping base, and is used for reducing or preventing vibration transmission between the damping base and the sound insulation cover. The problem that when the straightness of the 3D laser contourgraph is evaluated, external vibration is easily transmitted to the 3D laser contourgraph, so that an evaluation measurement result is inaccurate is mainly solved.

Description

Technical Field

[0001] The present application relates to the technical field of 3D laser profilers, and in particular to a vibration-damping platform and an evaluation device for evaluating the straightness of a 3D laser profiler. Background Art

[0002] A 3D laser profiler is a device used to measure the surface shape and contour of three-dimensional objects. Z-direction straightness refers to the accuracy and stability of the 3D laser profiler's straight line measurements in the z-axis direction. It describes whether the device can accurately measure the shape of a straight line in the z-axis direction, that is, its linear performance in the z-axis direction. Straightness is usually expressed in units of length (such as millimeters) and is used to evaluate the device's accuracy and stability in the z-axis direction. Z-direction straightness affects the accuracy and stability of the device's straight line measurements in the z-axis direction, while z-direction absolute accuracy focuses on the difference between the device's measured results in the z-axis direction and the true value, that is, the accuracy of the measurement. By comprehensively considering these two indicators, the performance of the 3D laser profiler in the z-axis direction can be more comprehensively evaluated.

[0003] The current method for measuring z-axis straightness with a 3D laser profiler involves moving a standard gauge block along the z-axis at equal intervals. The 3D laser profiler's measured values ​​are then compared with the theoretical values, and the maximum difference within the measurement range is calculated. To ensure accuracy, the following conditions must be met: the laser line must remain perpendicular to the gauge block during movement, and the gauge block's direction of motion must remain perpendicular to the laser line. However, meeting these two perpendicularity conditions is difficult in practice. This is because ensuring the laser line is strictly perpendicular to the measurement plane requires precise optical adjustment and calibration equipment. Furthermore, the system is significantly affected by environmental factors, and external vibrations can significantly impact the profile data. Summary of the Invention

[0004] This application mainly solves the problem that when evaluating the straightness of a 3D laser profiler, external vibrations are easily transmitted to the 3D laser profiler, resulting in inaccurate evaluation and measurement results.

[0005] The present application provides a vibration-damping platform for 3D laser profiler straightness evaluation, the vibration-damping platform comprising a vibration-damping base, a soundproof cover, and a vibration-damping ring;

[0006] The shock-absorbing base is used to place the 3D laser profiler. The shock-absorbing base is provided with a damping structure, and the damping structure is used to provide damping to reduce or prevent external vibration from being transmitted to the 3D laser profiler through a solid medium;

[0007] The soundproof cover is arranged on the shock-absorbing platform to reduce or prevent external vibration from being transmitted to the 3D laser profiler through the air;

[0008] The shock-absorbing ring is arranged between the shock-absorbing base and the sound insulation cover and is bonded to the shock-absorbing base. The shock-absorbing ring is used to reduce or prevent vibration transmission between the shock-absorbing base and the sound insulation cover.

[0009] In the above-mentioned vibration-damping platform for 3D laser profiler straightness evaluation, as a preferred solution, the vibration-damping base further includes a base plate and a pad, the damping structure is arranged between the base plate and the pad, and the 3D laser profiler is mounted on the pad;

[0010] The damping structure includes a coir layer and a rubber layer bonded to each other. The coir layer is bonded to the base plate and is made of coir stacked to a certain height. The rubber layer is bonded to the pad and is made of rubber.

[0011] In the above-mentioned vibration-damping platform for 3D laser profiler straightness evaluation, as a preferred solution, a plurality of mounting holes are provided on the pad, and the mounting holes are used for mounting the 3D laser profiler.

[0012] In the above-mentioned vibration-damping platform for 3D laser profiler straightness evaluation, as a preferred embodiment, the soundproof cover includes a transparent resin plate and a rubber strip;

[0013] There are five transparent resin plates, which are distributed in a cubic structure. The transparent resin plates are connected by rubber strips, which are provided with at least two card slots, and the at least two card slots are respectively used to clamp at least two transparent resin plates.

[0014] An embodiment of the present application further provides an evaluation device for evaluating the z-direction straightness of a 3D laser profiler, the evaluation device comprising a vibration-damping platform, a standard plane, and a rotary slide;

[0015] The shock-absorbing platform is used to provide damping to prevent external vibration from being transmitted to the standard plane, the rotary slide and the 3D laser profiler;

[0016] The standard plane is arranged on the shock absorbing platform, and the standard plane is used to provide a reference standard;

[0017] The rotary slide is mounted on the shock-absorbing platform, and the 3D laser profiler is mounted on the rotary slide; the rotary slide is used to provide support and rotation for the 3D laser profiler;

[0018] The 3D laser profiler includes at least a laser and a lens, wherein the laser is used to emit a laser line toward the standard plane, and the lens is used to collect the projection of the laser line on the standard plane to obtain profile data;

[0019] When the rotary slide is operated, the 3D laser profiler rotates based on the operation; when the 3D laser profiler rotates, the laser line emitted by the laser falls on the standard plane and the laser line projection on the standard plane fills the lens field of view.

[0020] In some embodiments, the 3D laser profiler is detachably connected to the rotary slide via a mounting plate; the mounting plate and the 3D laser profiler are detachably connected.

[0021] In some embodiments, the rotary slide includes a fixed portion, a rotating portion, and a connecting rod, wherein the fixed portion is fixedly arranged relative to the shock-absorbing platform, the rotating portion is rotatably connected to the fixed portion, the connecting rod and the rotating axis of the rotating portion are collinear, one end of the connecting rod is fixedly connected to the rotating portion, and the mounting plate is detachably connected to the other end of the connecting rod;

[0022] When the rotary slide is operated, the rotating portion rotates relative to the fixed portion, and the rotating portion drives the connecting rod to rotate, thereby driving the mounting plate detachably connected to the connecting rod and the 3D laser profiler to rotate.

[0023] In some embodiments, the rotary slide further includes a toggle handle, which is fixedly mounted on the rotating portion; when the toggle handle is operated, the rotary slide is operated, and the rotating portion rotates relative to the fixed portion.

[0024] In some embodiments, the rotary slide further includes a fixing screw, which is disposed on the rotating portion or the fixed portion; when the fixing screw is operated, the fixing screw is used to lock or unlock the rotating portion.

[0025] In some embodiments, the evaluation device further includes an adapter plate, and the rotary slide is connected to the shock-absorbing platform via the adapter plate; the adapter plate and the shock-absorbing platform are detachably connected.

[0026] According to the shock-absorbing platform and evaluation device for evaluating the straightness of a 3D laser profiler in the above-mentioned embodiment, a shock-absorbing base is provided to reduce or prevent external vibrations from being transmitted to the 3D laser profiler through a solid medium; a soundproof cover is provided to reduce or prevent external vibrations from being transmitted to the 3D laser profiler through the air; and the shock-absorbing base and soundproof cover mentioned above can reduce or avoid external vibration interference when evaluating the straightness of the 3D laser profiler, thereby improving measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1Schematic diagram of the overall structure of the vibration-damping platform for 3D laser profiler straightness evaluation provided in an embodiment of the present application (I);

[0028] Figure 2 Schematic diagram of the overall structure of the vibration-damping platform for 3D laser profiler straightness evaluation provided in an embodiment of the present application (II);

[0029] Figure 3 Schematic diagram of the overall structure of the vibration-damping platform for 3D laser profiler straightness evaluation provided in an embodiment of the present application (III);

[0030] Figure 4 A schematic diagram of the overall structure of the evaluation device provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of the overall structure of the rotary slide of the evaluation device provided in an embodiment of the present application;

[0032] Figure 6 Flowchart (1) of the evaluation method provided in the embodiment of the present application;

[0033] Figure 7 Flowchart (2) of the evaluation method provided in the embodiment of the present application;

[0034] Figure 8 This is a schematic diagram of the laser line effect collected by the 3D laser profiler in the evaluation method provided in the embodiment of the present application.

[0035] In the figure: 1. Shock-absorbing platform; 2. 3D laser profiler; 3. Standard plane; 4. Rotating slide; 401. Fixed part; 402. Rotating part; 403. Connecting rod; 404. Fixing screw; 405. Toggle handle; 5. Connecting plate; 6. Adapter plate; 7. Sound insulation cover; 701. Rubber strip; 702. Card slot; 703. Transparent resin plate; 8. Shock-absorbing base; 801. Base plate; 802. Cotton fiber layer; 803. Rubber layer; 804. Pad; 805. Mounting hole; 9. Shock-absorbing ring. DETAILED DESCRIPTION

[0036] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0037] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0038] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0039] Please refer to Figure 1 In order to solve the problem that external vibrations are easily transmitted to the 3D laser profiler when evaluating the straightness of the 3D laser profiler, thereby causing inaccurate evaluation and measurement results, the present application provides a shock-absorbing platform for 3D laser profiler straightness evaluation, the shock-absorbing platform comprising a shock-absorbing base 8, a sound insulation cover 7 and a shock-absorbing ring 9; the shock-absorbing base 8 is used to place the 3D laser profiler, and the shock-absorbing base 8 is provided with a damping structure, and the damping structure is used to provide damping to reduce or prevent external vibrations from being transmitted to the 3D laser profiler through a solid medium; the sound insulation cover 7 is arranged on the shock-absorbing platform, and is used to reduce or prevent external vibrations from being transmitted to the 3D laser profiler through the air; the shock-absorbing ring 9 is arranged between the shock-absorbing base 8 and the sound insulation cover 7, and is bonded to the shock-absorbing base 8, and the shock-absorbing ring 9 is used to reduce or prevent vibration transmission between the shock-absorbing base 8 and the sound insulation cover 7.

[0040] Please refer to Figure 2In the above-mentioned shock-absorbing platform for 3D laser profiler straightness evaluation, as a preferred solution, the shock-absorbing base 8 also includes a substrate 801 and a pad 804, the damping structure is arranged between the substrate 801 and the pad 804, and the 3D laser profiler is installed on the pad 804; the damping structure includes a coir layer 802 and a rubber layer 803 bonded to each other, the coir layer 802 is bonded to the substrate 801, and the coir layer 802 is made of coir stacked to a certain height; the rubber layer 803 is bonded to the pad 804, and the rubber layer 803 is made of rubber.

[0041] In the above-mentioned vibration-damping platform for 3D laser profiler straightness evaluation, as a preferred solution, a plurality of mounting holes 805 are provided on the pad 804 , and the mounting holes 805 are used for mounting the 3D laser profiler.

[0042] Please refer to Figure 3 In the above-mentioned shock-absorbing platform for 3D laser profiler straightness evaluation, as a preferred solution, the sound insulation cover 7 includes a transparent resin plate 703 and a rubber strip 701; the number of the transparent resin plates 703 is five, and the five transparent resin plates 703 are distributed in a cubic structure; the transparent resin plates 703 are connected by rubber strips 701, and at least two card slots 702 are opened on the rubber strips 701, and the at least two card slots 702 are respectively used to clamp at least two transparent resin plates 703.

[0043] In some embodiments, the cube structure surrounded by the five transparent resin plates 703 is a cube structure without the bottom surface. The five transparent resin plates constitute the five faces of the cube, and the bottom surface is open and is covered on the substrate 801 .

[0044] Please refer to Figure 4In order to solve the problem of inaccurate calculation results caused by the difficulty in achieving two perpendicular conditions when moving the 3D laser profiler 2, this embodiment provides an evaluation device for evaluating the z-direction straightness of the 3D laser profiler 2. The evaluation device includes a vibration-damping platform 1, a standard plane 3, and a rotating slide 4. The vibration-damping platform 1 is used to provide damping to prevent external vibration from being transmitted to the standard plane 3, the rotating slide 4, and the 3D laser profiler 2. The standard plane 3 is set on the vibration-damping platform 1 and is used to provide a reference standard. The rotating slide 4 is installed on the vibration-damping platform 1. The 3D laser profiler 2 is installed on a rotating slide 4; the rotating slide 4 is used to provide support and rotation for the 3D laser profiler 2; the 3D laser profiler 2 includes at least a laser and a lens, the laser is used to emit a laser line to the standard plane 3, and the lens is used to collect the laser line projection on the standard plane 3 to obtain profile data; when the rotating slide 4 is operated, the 3D laser profiler 2 rotates based on the operation; when the 3D laser profiler 2 rotates, the laser line emitted by the laser falls on the standard plane 3 and the laser line projection on the standard plane 3 fills the lens field of view.

[0045] In some embodiments, when the outline of the laser line projection extends from one side of the lens field of view to the other side, the laser line projection is considered to occupy the lens field of view. Figure 8 ,and Figure 8 The laser line projection distribution similar to the laser line rendering shown is considered to be that the laser line projection fills the lens field of view.

[0046] In some embodiments, the 3D laser profiler 2 is detachably connected to the rotary slide 4 via a mounting plate; the mounting plate and the 3D laser profiler 2 are detachably connected.

[0047] Please refer to Figure 5 In some embodiments, the rotary slide 4 includes a fixed part 401, a rotating part 402 and a connecting rod 403. The fixed part 401 is fixedly arranged relative to the shock-absorbing platform 1, the rotating part 402 is rotatably connected to the fixed part 401, the connecting rod 403 is collinear with the rotation axis of the rotating part 402, one end of the connecting rod 403 is fixedly connected to the rotating part 402, and the mounting plate is detachably connected to the other end of the connecting rod 403; when the rotary slide 4 is operated, the rotating part 402 rotates relative to the fixed part 401, and the rotating part 402 drives the connecting rod 403 to rotate, thereby driving the mounting plate detachably connected to the connecting rod 403 and the 3D laser profiler 2 to rotate.

[0048] In some embodiments, the rotary slide 4 further includes a toggle handle 405 , which is fixedly mounted on the rotating portion 402 ; when the toggle handle 405 is operated, the rotary slide 4 is operated, and the rotating portion 402 rotates relative to the fixed portion 401 .

[0049] In some embodiments, the rotary slide 4 further includes a fixing screw 404 , which is disposed on the rotating portion 402 or the fixed portion 401 ; when the fixing screw 404 is operated, the fixing screw 404 is used to lock or unlock the rotating portion 402 .

[0050] In some embodiments, the evaluation device further includes an adapter plate 6 , and the rotary slide 4 is connected to the shock-absorbing platform 1 via the adapter plate 6 ; the adapter plate 6 and the shock-absorbing platform 1 are detachably connected.

[0051] In some embodiments, the rotary slide 4 can rotate 360° along its rotation center.

[0052] In some embodiments, the adapter plate 6 is L-shaped, with multiple mounting holes provided on the bottom surface of the L-shaped adapter plate 6, and multiple mounting holes provided on the shock-absorbing platform 1. When adjusting the position of the L-shaped adapter plate 6, when the adapter plate 6 is adjusted to any position, the adapter plate 6 can be connected to the corresponding mounting holes of the shock-absorbing platform 1 using screws. The rotary slide 4 is mounted on the side of the L-shaped adapter plate 6, and the connecting rod 403 is perpendicular to the side of the adapter plate 6.

[0053] In some embodiments, the side of the L-shaped adapter plate 6 is perpendicular to the table surface of the shock-absorbing platform 1, the standard plane 3 is perpendicular to the table surface of the shock-absorbing platform 1, and the connecting rod 403 is parallel to both the table surface of the shock-absorbing platform 1 and the standard plane 3. When the 3D laser profiler 2 rotates around the connecting rod 403, it can maintain a perpendicular state to the standard plane 3.

[0054] In some embodiments, the rotating portion 402 is disc-shaped, and the connecting rod 403 is vertically connected to the center of the disc-shaped rotating portion 402 .

[0055] In some embodiments, the fixing portion 401 is disc-shaped.

[0056] In some embodiments, the evaluation device primarily includes: a vibration-damping platform 1, a 3D laser profiler 2, a 360° rotating slide 4, and a standard surface 3 to be measured. The 360° rotating slide 4 is secured to an adapter plate 6, and the 3D laser profiler 2 is secured to a mounting plate. After adjusting the distance between the 3D laser profiler 2 and the standard object to be measured, the connecting plate 5 is secured to the vibration-damping platform 1 to prevent external vibrations from affecting the test results. The device rotates about the connecting rod 403 by rotating the toggle handle 405.

[0057] Please refer to Figure 6 The present application also provides a method for evaluating the z-direction straightness of a 3D laser profiler, which is used to evaluate the z-direction straightness of a 3D laser profiler using the above-mentioned evaluation device. The method comprises the following steps:

[0058] Step S301: Acquire at least one set of contour data.

[0059] Step S302: Obtain the fitting straight line for each set of contour data, and calculate the distance between each point in the contour data and the fitting straight line.

[0060] Step S303 : Obtain the z-direction straightness of the 3D laser profiler according to the measurement range of the 3D laser profiler and the distance between each point and the fitted straight line.

[0061] In some embodiments, the step S101 of acquiring at least one set of contour data includes: acquiring at least one set of contour data by a 3D laser profiler when the rotary slide is operated at least once.

[0062] In some embodiments, when obtaining the fitting straight line for each set of contour data in step S102, the fitting straight line is obtained by the following method:

[0063] The fitting straight line z=kx+b for each set of contour data is obtained by the least squares method; wherein k and b are parameters of the fitting straight line, and x and z represent the coordinates of the points in the contour data on the x-axis and z-axis, respectively.

[0064] Calculating the distance between each point in the profile data and the fitted straight line includes: calculating the distance between each point in the profile data and the fitted straight line using the following formula:

[0065]

[0066] Where i represents the i-th group of contour data, and j represents the j-th point in the contour data.

[0067] In some embodiments, when performing step S103 to obtain the z-direction straightness of the 3D laser profiler according to the measurement range of the 3D laser profiler and the distance between each point and the fitted straight line, the straightness is obtained by the following method:

[0068] The distance d between each point and the fitted line ij Divide by the measurement range Z of the 3D laser profiler RM , we get:

[0069] D ij =d ij / Z RM ;

[0070] The calculated D ij Substitute into the probability density function Where, let x = D ij , where μ is the average distance from the point to the straight line, σ is the standard deviation, and e is the base of the natural logarithm. The straightness in the z direction of the 3D laser profiler is: 2*σ.

[0071] Please refer to Figure 7 In some embodiments, when the above evaluation device is used to evaluate the straightness in the z direction of a 3D laser profiler, the following steps are performed:

[0072] Step 401: Install the standard plane to be measured and the 3D laser profiler on a vibration-damping platform. The entire system of the standard plane to be measured and the 3D laser profiler is installed on the vibration-damping platform to prevent external vibrations from affecting the measurement results.

[0073] Step 402: Adjust the 3D laser profiler to an appropriate position. Adjust the distance between the 3D laser profiler and the measured standard plane so that the 3D laser profiler can cover the entire measurement depth of the 3D laser profiler during the rotation process. The laser line effect collected by the 3D laser profiler is as follows: Figure 8 After adjusting the distance between the 3D laser profiler and the standard plane to be measured, fix the connecting plate on the vibration-absorbing platform.

[0074] Step 403: Change the rotation angle of the 3D laser profiler to obtain at least one set of profile data. The 3D laser profiler is rotated by turning the toggle handle to rotate the 360° rotating stage around its center. After rotating the stage to a certain angle, the set screw is turned to secure the stage. The 3D laser profiler is then used to collect and save profile data. The 360° rotating stage is rotated multiple times within the measurement depth of field, and the data collected by the 3D laser profiler is saved.

[0075] Step 404: Obtain the fitted straight line for each set of contour data and calculate the distance between each point in the contour data and the fitted straight line. Use the least squares method to perform a straight line fit y=kx+b on the obtained contour data and calculate the distance from each point in the contour to the fitted straight line.

[0076] Step 405: Process the measurement range of the 3D laser profiler and the distance between each point and the fitting line. ij ) divided by the measuring range Z of the 3D profiler in the z direction RM D ij =d ij / Z RM .

[0077] Step 406: Obtain the z-direction straightness of the 3D laser profiler. Perform the data processing of steps S404 and S405 on each set of profile data collected by the 3D laser profiler. ij Substitute into the probability density function where x = D ij , where μ is the average distance from the point to the straight line, σ is the standard deviation of the data, and 2*σ is the straightness of the 3D laser profiler in the z direction.

[0078] Those skilled in the art will appreciate that all or part of the functions of the various methods in the above embodiments can be implemented by hardware or by computer program. When all or part of the functions in the above embodiments are implemented by computer program, the program can be stored in a computer-readable storage medium, and the storage medium can include: read-only memory, random access memory, disk, optical disk, hard disk, etc., and the program is executed by a computer to implement the above functions. For example, the program is stored in the memory of the device, and when the program in the memory is executed by the processor, all or part of the above functions can be implemented. In addition, when all or part of the functions in the above embodiments are implemented by computer program, the program can also be stored in a storage medium such as a server, another computer, disk, optical disk, flash disk or mobile hard disk, and saved in the memory of the local device by downloading or copying, or the system of the local device is updated. When the program in the memory is executed by the processor, all or part of the functions in the above embodiments can be implemented.

[0079] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For those skilled in the art of the present application, based on the concept of the present application, they can also make some simple deductions, modifications or substitutions.

Claims

1. A vibration-damping platform for 3D laser profiler straightness evaluation, characterized in that: The shock-absorbing platform includes a shock-absorbing base, a soundproof cover and a shock-absorbing ring; The shock-absorbing base is used to place the 3D laser profiler. The shock-absorbing base is provided with a damping structure, and the damping structure is used to provide damping to reduce or prevent external vibration from being transmitted to the 3D laser profiler through a solid medium; The soundproof cover is arranged on the shock-absorbing platform to reduce or prevent external vibration from being transmitted to the 3D laser profiler through the air; The shock-absorbing ring is arranged between the shock-absorbing base and the sound insulation cover and is bonded to the shock-absorbing base. The shock-absorbing ring is used to reduce or prevent vibration transmission between the shock-absorbing base and the sound insulation cover.

2. The vibration-damping platform for 3D laser profiler straightness evaluation according to claim 1, wherein: The shock-absorbing base further includes a base plate and a pad, the damping structure is arranged between the base plate and the pad, and the 3D laser profiler is mounted on the pad; The damping structure includes a coir layer and a rubber layer bonded to each other. The coir layer is bonded to the base plate and is made of coir stacked to a certain height. The rubber layer is bonded to the pad and is made of rubber.

3. The vibration-damping platform for 3D laser profiler straightness evaluation according to claim 2, wherein: The backing plate is provided with a plurality of mounting holes, and the mounting holes are used for mounting the 3D laser profiler.

4. The vibration-damping platform for 3D laser profiler straightness evaluation according to claim 1, wherein: The soundproof cover includes a transparent resin plate and a rubber strip; There are five transparent resin plates, which are distributed in a cubic structure. The transparent resin plates are connected by rubber strips, which are provided with at least two card slots, and the at least two card slots are respectively used to clamp at least two transparent resin plates.

5. An evaluation device for evaluating the z-direction straightness of a 3D laser profiler, characterized in that: The evaluation device comprises the shock absorbing platform according to any one of claims 1 to 4, and further comprises a standard plane and a rotating slide; The vibration-damping platform is used to place the 3D laser profiler and provide damping to prevent external vibration from being transmitted to the standard plane, the rotary slide and the 3D laser profiler; The standard plane is arranged on the shock absorbing platform, and the standard plane is used to provide a reference standard; The rotary slide is mounted on the shock-absorbing platform, and the 3D laser profiler is mounted on the rotary slide; the rotary slide is used to provide support and rotation for the 3D laser profiler; The 3D laser profiler includes at least a laser and a lens, wherein the laser is used to emit a laser line toward the standard plane, and the lens is used to collect the projection of the laser line on the standard plane to obtain profile data; When the rotary slide is operated, the 3D laser profiler rotates based on the operation; when the 3D laser profiler rotates, the laser line emitted by the laser falls on the standard plane and the laser line projection on the standard plane fills the lens field of view.

6. The evaluation device according to claim 5, wherein The 3D laser profiler is detachably connected to the rotary slide via a mounting plate; the mounting plate and the 3D laser profiler are detachably connected.

7. The evaluation device according to claim 6, wherein The rotary slide comprises a fixed portion, a rotating portion and a connecting rod, wherein the fixed portion is fixedly arranged relative to the shock-absorbing platform, the rotating portion is rotatably connected to the fixed portion, the connecting rod and the rotating axis of the rotating portion are collinear, one end of the connecting rod is fixedly connected to the rotating portion, and the mounting plate is detachably connected to the other end of the connecting rod; When the rotary slide is operated, the rotating portion rotates relative to the fixed portion, and the rotating portion drives the connecting rod to rotate, thereby driving the mounting plate detachably connected to the connecting rod and the 3D laser profiler to rotate.

8. The evaluation device according to claim 7, wherein The rotary slide further includes a toggle handle, which is fixedly mounted on the rotating portion. When the toggle handle is operated, the rotary slide is operated, and the rotating portion rotates relative to the fixed portion.

9. The evaluation device according to claim 7, wherein: The rotary slide further includes a fixing screw, which is arranged on the rotating part or the fixed part; when the fixing screw is operated, the fixing screw is used to lock or unlock the rotating part.

10. The evaluation device according to claim 7, wherein The evaluation device further includes an adapter plate, and the rotary slide is connected to the shock-absorbing platform via the adapter plate; the adapter plate and the shock-absorbing platform are detachably connected.

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