CN220980834U

CN220980834U - Accurate calibration device

Info

Publication number: CN220980834U
Application number: CN202322986276.9U
Authority: CN
Inventors: 杨伟; 伍玮
Original assignee: Sichuan Zhongke Zhuoer Optical Co ltd
Current assignee: Sichuan Zhongke Zhuoer Optical Co ltd
Priority date: 2023-11-06
Filing date: 2023-11-06
Publication date: 2024-05-17
Anticipated expiration: 2033-11-06

Abstract

The utility model discloses an accurate calibration device, which comprises a moving platform, wherein a first linear moving device is arranged at the top of the moving platform along a first direction, a lifting device is arranged on a moving part of the first linear moving device, a rotating device which rotates along an axis perpendicular to the first direction is arranged on a lifting part of the lifting device, a leveling device is arranged on a rotating part of the rotating device, a calibration plate is arranged on a leveling part of the leveling device, and a calibration target is arranged on the calibration plate; the utility model can accurately adjust the calibration plate to a position parallel to the horizontal plane or parallel to the plumb face, thereby realizing high-precision calibration of the camera relative to the horizontal plane or the plumb face.

Description

Accurate calibration device

Technical Field

The utility model belongs to the technical field of camera calibration, and relates to an accurate calibration device.

Background

Before the camera is used, calibration of the camera is required. In the prior art, a calibration plate is usually arranged, a calibration target is arranged on the calibration plate, the calibration target on the calibration plate is shot through a camera, and the camera is calibrated by resolving a shot image. In the prior art, however, the error of the relative included angle between the calibration plate and the horizontal plane or the plumb face is larger, so that the accuracy of calibrating the camera through the calibration plate which is parallel to the horizontal plane or the calibration plate which is parallel to the plumb face is insufficient, and the use requirement of the camera under the high accuracy requirement is difficult to meet.

Therefore, the utility model discloses an accurate calibration device aiming at the defect that the final camera calibration precision is insufficient due to the fact that the relative included angle error between a calibration plate and a horizontal plane or a plumb face is difficult to control in the prior art.

Disclosure of utility model

The utility model aims to provide an accurate calibration device which can accurately adjust a calibration plate to a position parallel to a horizontal plane or parallel to a plumb face so as to realize high-accuracy calibration of a camera relative to the horizontal plane or the plumb face.

The utility model is realized by the following technical scheme:

The utility model provides an accurate calibration device, includes moving platform, moving platform's top is provided with first linear movement device along first direction, be provided with elevating gear on first linear movement device's the movable part, be provided with on elevating gear's the elevating gear with the axis pivoted rotary device of perpendicular to first direction, be provided with levelling device on rotary device's the rotary part, be provided with the calibration board on levelling device's the levelling part, be provided with the calibration target on the calibration board.

The mobile platform can move on the ground, a first linear moving device is arranged at the top of the mobile platform along a first direction, the first linear moving device comprises a moving part which translates along the first direction, and a lifting device is connected to the moving part. The lifting device comprises a lifting part which is lifted along the vertical direction, and the lifting part is connected with a rotating device. The rotation device includes a rotation portion that rotates with an axis perpendicular to the first direction. The rotating part is connected with a leveling device, the leveling device comprises a leveling part capable of adjusting the inclination angle between the leveling part and the horizontal plane, a calibration plate is arranged on the leveling part, and calibration targets for camera shooting calibration are arranged at different positions on the calibration plate.

When the rotating part of the rotating device is in the initial state, the calibration plate is basically in a first position parallel to the horizontal plane, but in reality, the included angle between the calibration plate and the horizontal plane is not strictly 0 degrees when the calibration plate is in the first position. At the moment, the inclination angle of the calibration plate is finely adjusted through the leveling part of the leveling device, so that the included angle between the calibration plate and the horizontal plane is smaller than or equal to 0.005 degrees when the calibration plate is at the first position, and the calibration plate at the first position and the horizontal plane can be considered to be in a parallel state. Then keep the rotation part fixed, adjust the height of calibrating the board to predetermined height this moment through elevating gear, drive the translation of calibrating the board to the preset position along first direction through first linear movement device, then can adopt the camera to shoot the calibration target of different positions on the calibrating board to realize the calibration to the camera on the horizontal plane.

The rotating part of the rotating device rotates 90 degrees clockwise or 90 degrees anticlockwise, and then drives the calibration plate to rotate to a second position basically parallel to the plumb face, but in reality, the included angle between the calibration plate and the plumb face is not strictly 0 degree when the calibration plate is in the second position. At the moment, the inclination angle of the calibration plate relative to the plumb face is finely adjusted through the leveling part of the leveling device, so that the included angle between the calibration plate and the plumb face is smaller than or equal to 0.005 degrees when the calibration plate is at the second position, and the calibration plate at the second position and the plumb face can be considered to be in a parallel state. Then keep the rotation part fixed, adjust the height of calibrating the board to predetermined height this moment through elevating gear, drive the translation of calibrating the board to the preset position along first direction through first linear movement device, then can adopt the camera to shoot the calibration target of different positions on the calibrating board to the realization is to the calibration of camera on plumb face.

In order to better realize the utility model, the leveling device further comprises a leveling seat, a leveling expansion piece and a precision turntable, wherein the leveling seat is arranged on a rotating part of the rotating device, one end of the leveling seat is hinged with the rotating part, and the other end of the leveling seat is hinged with the leveling expansion piece; the end face, far away from the rotating part, of the leveling seat is provided with a precise rotary table, and the end face, far away from the leveling seat, of the precise rotary table is provided with a calibration plate.

In order to better realize the utility model, further, one end of the leveling seat is hinged with at least one first support arm, the other end of the leveling seat is hinged with at least one second support arm, one end of the first support arm away from the leveling seat is hinged with one side of the rotating part, and one end of the second support arm away from the leveling seat is hinged with the telescopic part of the leveling telescopic piece.

In order to better realize the utility model, further, the leveling telescopic piece comprises a leveling telescopic cylinder, the leveling telescopic cylinder is arranged on the rotating part, a connecting ball head is arranged at the end part of a push rod of the leveling telescopic cylinder, and a connecting ball socket which is connected with the connecting ball head in a universal fit manner is arranged at one end of the second support arm, which is far away from the leveling seat.

In order to better realize the utility model, further, a connecting flange is arranged on the end face of the turntable of the precision turntable.

In order to better realize the utility model, the rotating device comprises a rotating cross beam and a precise turntable, wherein the rotating cross beam is perpendicular to the first direction, the end part of the rotating cross beam is connected with the turntable of the precise turntable, and the precise turntable is arranged on the lifting part of the lifting device.

In order to better realize the utility model, further, the lifting device comprises a base, a lifting upright post and a linear lifting assembly, wherein the base is arranged on a moving part of the first linear moving device, the top of the base is provided with the lifting upright post, one side of the lifting upright post is provided with the linear lifting assembly, and the lifting part of the linear lifting assembly is provided with the precise turntable.

In order to better realize the utility model, the first linear moving device further comprises a first linear moving assembly, wherein the first linear moving assembly is respectively arranged at two edges of the top of the moving platform, which are parallel to the first direction, and a base is arranged between the moving parts of the two first linear moving assemblies.

In order to better realize the utility model, the movable platform further comprises an AGV trolley and a floating platform arranged at the top of the AGV trolley, lifting support feet are respectively arranged at four corners of the bottom of the floating platform, and the tops of the lifting support feet are hinged with the bottom of the floating platform.

In order to better realize the utility model, further, an inclination sensor is arranged on the floating platform, and a laser displacement sensor is arranged on one side of the lifting support leg.

Compared with the prior art, the utility model has the following advantages:

According to the utility model, the calibration plate is driven to rapidly rotate to a first position which is approximately parallel to the horizontal plane through the rotating device, then the calibration plate is driven to be accurately adjusted to a position with an included angle smaller than or equal to 0.005 DEG with the horizontal plane through the leveling device, so that the parallelism error between the calibration plate and the horizontal plane is obviously reduced, the horizontally leveled calibration plate is shot through the camera, and the calibration precision of the camera relative to the horizontal plane is obviously improved; according to the utility model, the calibration plate is driven to rapidly rotate to the second position which is approximately parallel to the plumb face through the rotating device, then the calibration plate is driven to be precisely adjusted to the position with the included angle smaller than or equal to 0.005 degrees with the plumb face through the leveling device, the parallelism error between the calibration plate and the plumb face is remarkably reduced, the calibration plate after the plumb is leveled through the camera is further shot, and the calibration precision of the camera relative to the plumb face is remarkably improved.

Drawings

FIG. 1 is a schematic view of a horizontal perspective structure of a calibration plate in a camera calibration device;

FIG. 2 is a front view of a calibration plate level in a camera calibration apparatus;

FIG. 3 is a schematic perspective view of a calibration plate plumb in a camera calibration apparatus;

FIG. 4 is a front view of a calibration plate plumb in a camera calibration apparatus;

FIG. 5 is a schematic structural view of a leveling device;

FIG. 6 is a schematic illustration of the connection of a leveling base to a leveling telescoping member;

FIG. 7 is a schematic diagram of the installation of a mobile platform;

Fig. 8 is a schematic structural diagram of a mobile platform.

Wherein: 1-a first linear movement device; 2-lifting device; 3-a rotating device; 4-leveling means; 5-calibrating the plate; 6-a mobile platform; 11-a first linear motion assembly; 21-lifting columns; 22-a linear lifting assembly; 31-a rotating cross beam; 41-leveling base; 42-leveling the telescoping member; 61-a floating platform; 62-lifting support legs; 411-a first arm; 412-a second arm; 421-leveling telescoping cylinder.

Detailed Description

The following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the utility model clearly indicates otherwise, and it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

For convenience of description, the words "upper", "lower", "left" and "right" in the present utility model, if they mean only that the directions are consistent with the upper, lower, left, and right directions of the drawings per se, and do not limit the structure, only for convenience of description and simplification of the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "mounted," "connected," "secured," and the like are to be construed broadly and refer to either a fixed connection, a removable connection, or an integral body, for example; the terms are used herein as specific meanings as understood by those of ordinary skill in the art, and are not limited to the following terms.

Example 1:

An accurate calibration device of this embodiment, as shown in fig. 1, includes moving platform 6, and moving platform 6's top is provided with first linear movement device 1 along first direction, is provided with elevating gear 2 on the mobile part of first linear movement device 1, is provided with on elevating gear 2's the elevating part with the rotatory rotary device 3 of axis pivoted of perpendicular to first direction, is provided with levelling device 4 on rotary device 3's the rotary part, is provided with calibration board 5 on levelling device 4's the levelling part, is provided with a plurality of calibration targets on the calibration board 5.

The moving platform 6 is used for driving components mounted on the moving platform to move and transfer rapidly, the moving part of the first linear moving device 1 translates along the first direction, one side of the moving part of the first linear moving device 1 is provided with a linear displacement sensor, and the moving distance of the moving part of the first linear moving device 1 is detected through the linear displacement sensor. The lifting device 2 is arranged on the moving part of the first linear moving device 1, the lifting part of the lifting device 2 can linearly lift along the vertical direction, a linear displacement sensor is arranged on one side of the lifting part, and the lifting distance of the lifting part of the lifting device 2 is detected through the linear displacement sensor. The lifting part is provided with a rotating device 3, the rotating part of the rotating device 3 can circumferentially rotate along an axis vertical to the first direction in the horizontal plane, one side of the rotating part is provided with a rotation angle sensor, and the rotation angle of the rotating part is detected through the rotation angle sensor. The rotating part is provided with a leveling device 4, the leveling device 4 comprises a leveling part, the leveling part can adjust an included angle between the leveling device and the horizontal plane, one side of the adjusting part is fixedly provided with a calibration plate 5, and calibration targets are arranged on the calibration plate 5 at different positions.

The calibration process for the camera is as follows:

The camera is calibrated in a horizontal plane, as shown in fig. 1 and 2, the rotating part of the rotating device 3 drives the calibration plate 5 to rotate to a first position which is approximately parallel to the horizontal plane, and then the leveling part of the leveling device 4 is used for fine-adjusting the included angle between the calibration plate 5 and the horizontal plane, so that the included angle between the calibration plate 5 and the horizontal plane is between 0 degree and 0.005 degree when the calibration plate 5 is positioned at the first position, and the calibration plate comprises two end point values of 0 degree and 0.005 degree, and the calibration plate 5 can be considered to be parallel to the horizontal plane at the moment. The rotating part is kept fixed with the leveling part, the height of the calibration plate 5 in the vertical direction is adjusted through the lifting device 2, and the position of the calibration plate 5 in the horizontal plane along the first direction is adjusted through the first linear moving device 1. Then, the camera to be calibrated can shoot the calibration target on the calibration plate 5, the shot image is sent to an external computer, and the camera is calibrated on the horizontal plane through an algorithm built in the external computer.

The camera is calibrated on the plumb face, as shown in fig. 3 and 4, the rotating part of the rotating device 3 drives the calibration plate 5 to rotate to a second position which is approximately parallel to the plumb face, and then the included angle between the calibration plate 5 and the plumb face is finely adjusted through the leveling part of the leveling device 4, so that the included angle between the calibration plate 5 and the plumb face is between 0 degree and 0.005 degree when the calibration plate 5 is positioned at the second position, and the calibration plate 5 and the plumb face can be considered to be parallel at the moment because the calibration plate comprises two end points of 0 degree and 0.005 degree. The rotating part is kept fixed with the leveling part, the height of the calibration plate 5 in the vertical direction is adjusted through the lifting device 2, and the position of the calibration plate 5 in the horizontal plane along the first direction is adjusted through the first linear moving device 1. Then, the camera to be calibrated can shoot the calibration target on the calibration plate 5, the shot image is sent to an external computer, and the camera is calibrated on the plumb face through an algorithm built in the external computer.

Example 2:

The precise calibration device of the embodiment is improved on the basis of the embodiment 1, as shown in fig. 5, the leveling device 4 comprises a leveling seat 41, a leveling expansion piece 42 and a precise turntable, the leveling seat 41 is arranged on a rotating part of the rotating device 3, one end of the leveling seat 41 is hinged with the rotating part, and the other end of the leveling seat 41 is hinged with the leveling expansion piece 42; the end surface of the leveling seat 41 far away from the rotating part is provided with a precise turntable, and the end surface of the precise turntable far away from the leveling seat 41 is provided with a calibration plate 5.

The base shell of the precise turntable is connected with one side end face of the leveling seat 41, the turntable of the precise turntable is connected with the calibration plate 5, the calibration plate 5 can be driven to rotate through the precise turntable, and the rotation positioning error is less than or equal to 0.002 degrees. The telescopic part of the leveling telescopic piece 42 is hinged with the end surface of the other side of the leveling seat 41, and the telescopic part of the leveling telescopic piece 42 stretches and contracts to further adjust the inclination angle of the leveling seat 41, namely the included angle of the calibration plate 5 relative to the horizontal plane.

Further, as shown in fig. 6, one end of the leveling seat 41 is hinged with at least one first support arm 411, the other end of the leveling seat 41 is hinged with at least one second support arm 412, one end of the first support arm 411 away from the leveling seat 41 is hinged with one side of the rotating part, and one end of the second support arm 412 away from the leveling seat 41 is hinged with the telescopic part of the leveling telescopic piece 42.

When the telescopic part of the leveling telescopic piece 42 stretches out or retracts, the second support arm 412 drives the other end of the leveling seat 41 to move, so that the positions of the two ends of the leveling seat 41 relative to the plumb face change, and the included angle of the calibration plate 5 mounted on the leveling seat 41 relative to the plumb face is adjusted.

Further, a connecting flange is arranged on the end face of the turntable of the precise turntable, a plurality of connecting holes are formed in the connecting flange along the circumferential direction, a plurality of threaded holes are formed in the end face of one side of the calibration plate 5, corresponding to the connecting holes, and the calibration plate 5 is connected with the precise turntable by inserting screws into the connecting holes and the threaded holes.

Other portions of this embodiment are the same as those of embodiment 1, and thus will not be described in detail.

Example 3:

An accurate calibration device of this embodiment is improved on the basis of embodiment 1 or 2, as shown in fig. 6, the leveling telescoping member 42 includes a leveling telescoping cylinder 421, the leveling telescoping cylinder 421 is disposed on the rotating portion, a connecting ball is disposed at an end of a push rod of the leveling telescoping cylinder 421, and a connecting ball socket connected with the connecting ball in a universal fit is disposed at an end of the second support arm 412 away from the leveling base 41.

As shown in the figure, two first support arms 411 are symmetrically hinged on two sides of the front end of the leveling seat 41, two second support arms 412 are symmetrically hinged on two sides of the rear end of the leveling seat 41, two leveling telescopic cylinders 421 are arranged on the rotating part corresponding to the end parts of the two second support arms 412, and the end parts of push rods of the leveling telescopic cylinders 421 are in universal rotation connection with the end parts of the second support arms 412 through connecting ball heads.

The push rod of the leveling telescopic cylinder 421 stretches to drive the leveling seat 41 to change the included angle of the leveling seat relative to the horizontal plane or the plumb face, so that the included angle of the calibration plate 5 relative to the horizontal plane or the plumb face is adjusted.

Other portions of this embodiment are the same as those of embodiment 1 or 2, and thus will not be described in detail.

Example 4:

An accurate calibration device of this embodiment is an improvement on any one of embodiments 1 to 3, as shown in fig. 7, the rotating device 3 includes a rotating beam 31 and an accurate turntable, the rotating beam 31 is disposed perpendicular to the first direction, an end of the rotating beam 31 is connected with the turntable of the accurate turntable, and the accurate turntable is disposed on the lifting portion of the lifting device 2.

The end of the rotary cross beam 31 is provided with a connecting flange, the turntable of the precise turntable is provided with a connecting threaded hole, the connecting flange is provided with a connecting through hole corresponding to the connecting threaded hole, and the rotary cross beam 31 is connected with the precise turntable by inserting screws into the connecting through hole and the connecting threaded hole. The middle position of the rotary cross beam 31 is provided with a mounting base for supporting and connecting the leveling base 41 and the leveling telescopic cylinder 421. The fixed housing in the precise state is connected with one side of the lifting part of the lifting device 2 through the connecting frame, so that the rotary cross beam 31 can be driven by the lifting part to lift in the vertical direction while rotating along with the precise turntable.

Other portions of this embodiment are the same as any of embodiments 1 to 3, and thus will not be described in detail.

Example 5:

The precise calibration device of this embodiment is improved on the basis of any one of embodiments 1 to 4, as shown in fig. 7, the lifting device 2 includes a base, a lifting upright post 21, and a linear lifting assembly 22, the base is disposed on a moving portion of the first linear moving device 1, the lifting upright post 21 is disposed on the top of the base, the linear lifting assembly 22 is disposed on one side of the lifting upright post 21, and a precise turntable is disposed on the lifting portion of the linear lifting assembly 22.

Lifting columns 21 are symmetrically arranged at the front end and the rear end of the top of the base, and a linear lifting assembly 22 is arranged on one side of at least one lifting column 21. As shown, linear elevating assemblies 22 are provided on opposite sides of the elevating columns 21 at both front and rear ends.

Further, the linear elevating assembly 22 includes any one of a screw elevator and a linear elevating slide.

Other portions of this embodiment are the same as any of embodiments 1 to 4, and thus will not be described in detail.

Example 6:

An accurate calibration device according to this embodiment is an improvement on any one of embodiments 1 to 5, as shown in fig. 7, the first linear motion device 1 includes a first linear motion assembly 11, two edges parallel to the first direction on the top of the moving platform 6 are respectively provided with the first linear motion assembly 11, and a base is disposed between the moving parts of the two first linear motion assemblies 11.

As shown in the figure, two first linear moving assemblies 11 are arranged at the front and rear ends of the top of the moving platform 6 in parallel, and a base is spanned between the moving parts of the first linear moving assemblies 11 at the front and rear ends.

Further, the first linear moving assembly 11 includes any one of a screw linear translation device or a linear slide.

Other portions of this embodiment are the same as any of embodiments 1 to 5, and thus will not be described in detail.

Example 7:

The precise calibration device of this embodiment is improved on the basis of any one of embodiments 1 to 6, as shown in fig. 8, the moving platform 6 includes an AGV trolley and a floating platform 61 disposed at the top of the AGV trolley, lifting legs 62 are disposed at four corners of the bottom of the floating platform 61, respectively, and the top of the lifting legs 62 is hinged to the bottom of the floating platform 61.

Through the lift volume of control lift stabilizer blade 62, and then make the difference appear in the height of floating platform 61 four corners department, and then adjust floating platform 61 for the contained angle of horizontal plane, guarantee that contained angle between floating platform 61 and the horizontal plane is less than or equal to 0.005, and then provide the location benchmark for the leveling of follow-up calibration board 5, guaranteed the precision of calibration board 5 leveling.

Further, an inclination sensor is provided on the floating platform 61, and a laser displacement sensor is provided on one side of the elevating leg 62. The included angle of the floating platform 61 relative to the horizontal plane is detected through the inclination angle sensor, the lifting stroke of the lifting support legs 62 is detected through the laser displacement sensor, included angle data and lifting stroke data are sent to an external computer, and the external computer controls the lifting amount of the lifting support legs 62 in real time according to the included angle data and the lifting stroke data until the included angle between the floating platform 61 and the horizontal plane reaches the standard.

Other portions of this embodiment are the same as any of embodiments 1 to 6, and thus will not be described in detail.

The above is only a preferred embodiment of the present utility model, and the present utility model is not limited in any way, and any simple modification and equivalent changes of the above embodiments according to the technical substance of the present utility model fall within the protection scope of the present utility model.

Claims

1. The utility model provides an accurate calibration device, includes moving platform (6), its characterized in that, the top of moving platform (6) is provided with first linear movement device (1) along first direction, be provided with elevating gear (2) on the mobile part of first linear movement device (1), be provided with on the elevating gear's (2) elevating gear's the elevating part with perpendicular to first direction's axis pivoted rotary device (3), be provided with levelling device (4) on the rotary part of rotary device (3), be provided with on the levelling part of levelling device (4) and mark board (5), be provided with on the board (5) of demarcating and mark the target.

2. The precise calibration device according to claim 1, wherein the leveling device (4) comprises a leveling seat (41), a leveling expansion piece (42) and a precise turntable, the leveling seat (41) is arranged on a rotating part of the rotating device (3), one end of the leveling seat (41) is hinged with the rotating part, and the other end of the leveling seat (41) is hinged with the leveling expansion piece (42); the end face, far away from the rotating part, of the leveling seat (41) is provided with a precise rotary table, and the end face, far away from the leveling seat (41), of the precise rotary table is provided with a calibration plate (5).

3. An accurate calibration device according to claim 2, characterized in that one end of the leveling base (41) is hinged with at least one first support arm (411), the other end of the leveling base (41) is hinged with at least one second support arm (412), one end of the first support arm (411) away from the leveling base (41) is hinged with one side of the rotating part, and one end of the second support arm (412) away from the leveling base (41) is hinged with the telescopic part of the leveling telescopic part (42).

4. A precision calibration device according to claim 3, characterized in that the levelling telescoping member (42) comprises a levelling telescoping cylinder (421), the levelling telescoping cylinder (421) is arranged on the rotating part, the push rod end of the levelling telescoping cylinder (421) is provided with a connecting ball head, and the end of the second support arm (412) far away from the levelling seat (41) is provided with a connecting ball socket connected with the connecting ball head in a universal fit.

5. The precise calibration device according to claim 4, wherein a connecting flange is arranged on the end face of the precise turntable.

6. An accurate calibration device according to any one of claims 1-5, characterized in that the rotating means (3) comprises a rotating cross member (31), a precision turntable, the rotating cross member (31) being arranged perpendicular to the first direction, the end of the rotating cross member (31) being connected to the turntable of the precision turntable, the precision turntable being arranged on the lifting part of the lifting means (2).

7. The precise calibration device according to claim 6, wherein the lifting device (2) comprises a base, a lifting upright (21) and a linear lifting assembly (22), the base is arranged on the moving part of the first linear moving device (1), the lifting upright (21) is arranged at the top of the base, the linear lifting assembly (22) is arranged on one side of the lifting upright (21), and a precise turntable is arranged on the lifting part of the linear lifting assembly (22).

8. An accurate calibration device according to claim 7, characterized in that the first linear movement device (1) comprises a first linear movement assembly (11), the first linear movement assembly (11) is respectively arranged at two edges of the top of the movement platform (6) parallel to the first direction, and a base is arranged between the movement parts of the two first linear movement assemblies (11).

9. The precise calibration device according to claim 8, wherein the moving platform (6) comprises an AGV trolley and a floating platform (61) arranged at the top of the AGV trolley, lifting support legs (62) are respectively arranged at four corners of the bottom of the floating platform (61), and the tops of the lifting support legs (62) are hinged with the bottom of the floating platform (61).

10. The precise calibration device according to claim 9, wherein the floating platform (61) is provided with an inclination sensor, and one side of the lifting support leg (62) is provided with a laser displacement sensor.