CN216694868U

CN216694868U - Calibration system and calibration system

Info

Publication number: CN216694868U
Application number: CN202122458085.6U
Authority: CN
Inventors: 张函
Original assignee: Autel Intelligent Technology Corp Ltd
Current assignee: Autel Intelligent Technology Corp Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-06-07
Anticipated expiration: 2031-10-12

Abstract

The utility model relates to the field of four-wheel positioning, and discloses a calibration system and a calibration system. Calibration equipment includes the base, pivot and two locking knobs, and the pivot is rotatable, has seted up two mounting holes respectively on the both ends face of pivot, has seted up two locking screws at the outer peripheral face of pivot, and locking screw intercommunication mounting hole, two locking screws set up on the straight line that is on a parallel with the central line of pivot, have avoided machining error, and two locking knobs include knob main part and screw rod respectively, and the knob main part is connected to the screw rod, is provided with first plane portion on the terminal surface of screw rod. The two targets respectively comprise a target main body and an installation shaft, one end of the installation shaft is connected to the target main body, a second plane part is arranged on the peripheral surface of the installation shaft, and the installation shaft is used for being inserted into an installation hole; the screw rod is used for screwing in the locking screw hole when the installation axle inserts the mounting hole, until the second plane and first plane portion laminate mutually, has avoided assembly error.

Description

Calibration system and calibration system

Technical Field

The utility model relates to the field of four-wheel positioning, in particular to a calibration system and a calibration system.

Background

In the field of automobile calibration and calibration, four-wheel positioning calibration is carried out on a vehicle to be detected through detection equipment, the accuracy of the detection equipment, namely the measured data is accurate, is required to be ensured when the four-wheel positioning calibration is finished, and therefore calibration is required to be carried out through the calibration equipment after the detection equipment is used for a period of time.

During calibration, a target is respectively installed at two ends of a rotating shaft of the calibration equipment, the angles of the targets at the two ends need to be overlapped, and after the targets are installed, the detection equipment reads data on the targets and calibrates the logarithm.

However, in practical situations, due to processing and assembly errors of materials, there are always angular errors of the targets on both ends, resulting in errors in the calibration results.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims to provide a calibration system and a calibration system, and aims to solve the technical problem that in the prior art, angle errors always exist in targets at two ends due to processing and assembling errors of materials.

The embodiment of the utility model adopts the following technical scheme for solving the technical problems: providing a calibration system comprising:

the calibration equipment comprises a base, a rotating shaft and two locking knobs, wherein the rotating shaft is arranged on the base, the rotating shaft can rotate relative to the base around the center line of the rotating shaft, two mounting holes are respectively formed in two end faces of the rotating shaft, the center line of each mounting hole is coincident with the center line of the rotating shaft, two locking screw holes are respectively formed in the outer peripheral face of the rotating shaft and close to two ends of the rotating shaft, the locking screw holes are communicated with the mounting holes, the two locking screw holes are arranged on a straight line parallel to the center line of the rotating shaft, each locking knob comprises a knob main body and a screw rod, one end of the screw rod is connected with the knob main body, and a first plane part is arranged on the end face of the other end of the screw rod; and

the two targets respectively comprise a target main body and an installation shaft, one end of the installation shaft is connected to the target main body, a second plane part is arranged on the outer peripheral surface of the installation shaft, and the installation shaft is used for being inserted into the installation hole;

the screw is used for screwing the locking screw hole when the mounting shaft is inserted into the mounting hole until the second plane is attached to the first plane.

In some embodiments, the base comprises two supports and a connecting rod;

the two supporting pieces support the rotating shaft, the length direction of the connecting rod is parallel to the central line of the rotating shaft, and the connecting rod is arranged between the two supporting pieces.

In some embodiments, the upper parts of the two supporting pieces are respectively provided with a V-shaped groove;

the V-shaped groove comprises two groove walls, an inner angle is formed at the joint between the two groove walls, and the two groove walls bear the rotating shaft.

In some embodiments, each of the two support members is provided with a limit bracket;

the lower part of the limiting support is fixedly connected to the side part of the supporting part, the upper part of the limiting support is arranged above the two groove walls, and the upper part of the limiting support is in threaded connection with a limiting bolt which is used for radially limiting the rotating shaft.

In some embodiments, two portions of the rotating shaft respectively close to two ends of the rotating shaft are respectively sleeved with a shaft sleeve, the shaft sleeves are fixed on the rotating shaft, and the two groove walls support the rotating shaft through the shaft sleeves.

In some embodiments, the sleeve comprises a first section, a second section and a third section which are connected in sequence;

the outer diameter of the second section is larger than that of the first section and that of the third section;

the peripheral surface of the first section is abutted against the two groove walls.

In some embodiments, a rocker is disposed on the sleeve and is fixedly connected to the sleeve, and the rocker is kidney-shaped.

In some embodiments, the swing member is sleeved outside the third section and fixed to an end surface of the second section by a radial bolt.

In some embodiments, positioning holes are respectively formed on two end faces of the rotating shaft; each target further comprises a positioning pin, the positioning pin and the mounting shaft are arranged on the same surface of the target main body in a protruding mode, and the positioning pin is used for being inserted into the positioning hole.

The embodiment of the utility model adopts the following technical scheme for solving the technical problems: a calibration system, comprising:

a calibration system as described above; and

the detection device comprises two cameras, and the two cameras are used for acquiring images of the two targets.

Compared with the prior art, in the calibration system and the calibration system provided by the embodiment of the utility model, the position of the second plane part of the mounting shaft approximately corresponds to the position of the locking screw hole, the screw of the locking knob is screwed into the locking screw hole, and when the screw is screwed in place, the first plane part of the screw is attached to the second plane part of the mounting shaft, so that the angle deviation of the target is automatically corrected, and the assembly error can be avoided. Because the two locking screw holes are positioned on a straight line parallel to the central line of the rotating shaft, only translation of a machine tool is needed when the two locking screw holes are processed, and the rotating shaft does not need to do circular motion, so that the angle deviation of the two locking screw holes in the circumferential direction of the rotating shaft is avoided, the precision of the two locking screw holes in the angle is ensured, and the processing error can be avoided. Therefore, the problem that the target at two ends always has angle errors due to processing and assembling errors of materials is solved.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is a schematic diagram of a calibration system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a calibration system of the calibration system shown in FIG. 1;

FIG. 3 is a schematic illustration of the target of the calibration system shown in FIG. 2 rotated to an intermediate position;

FIG. 4 is a schematic illustration of the target counter-clockwise rotation of the calibration system shown in FIG. 2;

FIG. 5 is a schematic illustration of the clockwise rotation of the target of the calibration system shown in FIG. 2;

FIG. 6 is a schematic illustration of the calibration system of FIG. 3 with two targets in an ideal position;

FIG. 7 is a schematic illustration of the calibration system of FIG. 4 with two targets in an ideal position;

FIG. 8 is a schematic illustration of the calibration system of FIG. 5 with two targets in ideal positions;

FIG. 9 is a schematic illustration of the calibration system of FIG. 3 with angular misalignment of the two targets;

FIG. 10 is a schematic illustration of the calibration system of FIG. 4 with angular misalignment of the two targets;

FIG. 11 is a schematic illustration of the calibration system of FIG. 5 with angular misalignment of the two targets;

FIG. 12 is a schematic diagram of a calibration apparatus of the calibration system shown in FIG. 2;

FIG. 13 is a disassembled schematic view of the calibration apparatus shown in FIG. 12;

FIG. 14 is a schematic structural diagram of a rotating shaft of the calibration apparatus shown in FIG. 12, wherein the rotating shaft is shown by a drawing with a length omitted;

FIG. 15 is a schematic structural view of a locking knob of the calibration device shown in FIG. 12;

FIG. 16 is a schematic structural view of a target of the calibration system shown in FIG. 2;

FIG. 17 is a schematic view of the target of FIG. 16 at another angle;

FIG. 18 is a schematic view of the calibration system shown in FIG. 2 at another angle;

FIG. 19 is a cross-sectional view taken at A-A of FIG. 18;

fig. 20 is a partial enlarged view at b shown in fig. 19;

FIG. 21 is a schematic diagram of a portion of the calibration system shown in FIG. 2;

FIG. 22 is a schematic illustration of the two targets of the calibration system of FIG. 3 before being adjusted;

FIG. 23 is a schematic illustration of the calibration system of FIG. 4 with the two targets unadjusted;

FIG. 24 is a schematic illustration of the two targets of the calibration system of FIG. 5 before being adjusted;

FIG. 25 is a schematic view of the calibration system of FIG. 3 with the two targets adjusted;

FIG. 26 is a schematic view of the calibration system of FIG. 4 with the two targets adjusted;

FIG. 27 is a schematic view of the calibration system of FIG. 5 with the two targets adjusted.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model is described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "connected" to another element, it can be directly on the other element or intervening elements may be present. The terms "upper", "lower", "left", "right", "upper", "lower", "top" and "bottom" used in the present specification indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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 invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The automobile is an important transportation tool which is indispensable in people's life, and the driving performance of the automobile is closely related to the life safety of people. In order to ensure the driving performance of the automobile, the components on the automobile need to be calibrated regularly or according to requirements after the automobile leaves the factory, and in the calibration process, the calibration is usually realized by means of a detection device, wherein the position of a camera in the detection device plays a crucial role in the whole process of four-wheel positioning.

The four-wheel positioning is based on four-wheel parameters of the vehicle, and good running performance of the vehicle is ensured and certain reliability is achieved through adjustment. In life, when a driver obviously feels that the vehicle is easy to deviate, the relative positions of the wheels, the steering knuckle or the front axle (or the rear axle) of the vehicle are generally changed, so that the four wheels cannot normally operate, and the phenomena of deviation and slipping occur. Therefore, the wheels of the vehicle need to be regularly or on demand calibrated to prevent the occurrence of traffic accidents.

Generally speaking, the alignment of the wheels of the vehicle requires calibration by means of a detection device, which is usually achieved by means of cameras on the detection device, in particular by capturing images of hub clamp assemblies mounted on the four wheels, so as to determine the position of the wheels with respect to the steering knuckle and the front axle (or rear axle), and adjusting the wheels according to the acquired position information of the wheels. Wherein, wheel hub presss from both sides the subassembly and includes wheel hub clamp and target, and the target is installed on the wheel hub presss from both sides. The camera determines the position of the wheel based on a target mounted on the hub clamp.

Generally, before four-wheel positioning is performed on a wheel, a camera in the detection device needs to be calibrated, so that inaccurate measurement caused by the change of the position of the camera after the detection device is used for a long time is avoided.

Referring to fig. 1 and 2, an embodiment of the utility model provides a calibration system, which includes a calibration apparatus 100 and two targets 200, and a detection apparatus 300.

The calibration apparatus 100 includes a base 10 and a shaft 20. The central line of the rotating shaft 20 is horizontally disposed, the rotating shaft 20 is installed on the base 10, and two ends of the rotating shaft 20 are used for installing two targets 200. The shaft 20 can rotate around its center line relative to the base 10 to drive the two targets 200 to rotate together. The inspection apparatus 300 includes two cameras 302, and the two cameras 302 are used to acquire images of the two targets 200, so that the inspection apparatus 300 can read data on the two targets 200 and perform calibration according to the read data.

Throughout the calibration process, the spindle 20 rotates the target 200, first in the neutral position shown in fig. 3, counterclockwise as shown in fig. 4, and then clockwise as shown in fig. 5. The relative positions of the targets are displayed on the screen of the detection device, the display effect is shown in the figure, in an ideal position as shown in fig. 6 to 8, the circumferential directions of the two targets mounted on the rotating shaft are completely overlapped without an angle error, and if an angle error exists between the two targets, the two arrows are not on the same straight line as shown in fig. 9 to 11.

Referring to fig. 12 and 13, the base 10 includes a first supporting member 11, a second supporting member 12 and a connecting rod 13. The length direction of the connecting rod 13 is parallel to the center line of the rotating shaft 20, and the connecting rod 13 is disposed below the rotating shaft 20 and between the first supporting member 11 and the second supporting member 12. The connecting rod 13 may be fixed between the first support 11 and the second support 12 by a bolt, a rivet, a welding layer, or other connecting structure. Sockets are respectively arranged on the first support 11 and the second support 12, and are respectively used for inserting two ends of a connecting rod 13.

The lower portion of the first support 11 is substantially in the shape of an inverted triangle. Two vertical bolts 120 are screwed to the lower portion of the second support member 12. The lower portions of the two vertical bolts 120 and the lower portion of the first support 12 form a triangular support structure for supporting the whole calibration apparatus 100 on the ground. Both vertical bolts 120 are vertically movable with respect to the second support 12 to adjust the tilt angle of the entire calibration apparatus 100 on the ground, which can be used on various terrains.

V-shaped grooves are respectively arranged on the upper parts of the two supporting pieces, namely the upper part of the first supporting piece 11 and the upper part of the second supporting piece 12, the V-shaped grooves comprise two groove walls 110, and the joint between the two groove walls 110 forms an inner angle. The two slot walls 110 are used together to support the shaft 20.

It can be understood that, according to actual needs, a U-shaped groove may be disposed on the upper portions of the two supporting members, instead of the V-shaped groove, as long as the supporting member can support the rotating shaft 20.

The two supporting pieces are respectively provided with a limiting bracket 112. The lower part of the limit bracket 112 is fixedly connected to the side part of the support member by screws, and the upper part of the limit bracket 112 is arranged above the two groove walls 110.

The upper part of the limit bracket 112 is screwed with a limit bolt 114 which is vertically arranged. The stop bolt 114 is used to radially stop the rotating shaft 20 to prevent the rotating shaft 20 from separating from the two groove walls 110 to some extent.

When the rotating shaft 20 needs to be tightly installed on the upper parts of the two supporting pieces, the locking can be realized only by screwing the limiting bolt 114 and enabling the limiting bolt 114 to abut against the rotating shaft. It can be understood that the rotation shaft 20 can be rotated to adjust the axial position of the rotation shaft 20 by loosening the limit bolt 114 to make the rotation shaft 20 have a space in the V-shaped groove.

Two portions of the rotating shaft 20, which are respectively close to the two ends of the rotating shaft, are respectively sleeved with a shaft sleeve 21. The sleeve 21 is in interference fit with the rotating shaft 20 to be fixed to the rotating shaft 20. The sleeve 21 includes a first section, a second section, and a third section connected in sequence. The outer diameter of the second section is larger than that of the first section and that of the third section.

The outer circumference of the first segment abuts against the two groove walls 110.

A rocker 22 is mounted on the third section. The swing portion 22 is substantially waist-shaped, and the inner hole of the swing portion 22 is opened at the center for the rotation shaft 20 to pass through. The rocker 22 is fixedly attached to the end of the second section by axial bolts. Through designing pendulum-type 22 for waist shape, pivot 20 is under not receiving the exogenic action, and pendulum-type 22 swings around the central line of pivot 20 under its own gravity's effect, and until length direction is on a parallel with vertical direction, has automatic re-setting's function. The swing portion 22 is hollow, so that the material of the swing portion 22 can be reduced, the weight of the swing portion 22 is reduced, and the load of the rotating shaft 20 is reduced.

A first section of one of the shaft sleeves 21 is provided with a limit groove arranged along the circumferential direction. Two groove walls of one support member are sunk into the limit groove to limit the axial movement of the shaft sleeve 21 relative to the support member.

Referring to fig. 14, mounting holes 23 are formed on both end surfaces of the shaft 20.

Two ends of the outer peripheral surface of the rotating shaft 20, which are respectively close to the rotating shaft 20, are respectively provided with a locking screw hole 24, and the two locking screw holes 24 are positioned on a straight line parallel to the central line of the rotating shaft 20.

The locking screw hole 24 is communicated with the mounting hole 23.

The shaft 20 includes a cylindrical body and two cylindrical bodies. The two columns are sleeved in openings at two ends of the cylinder body and are respectively fixed at two ends of the cylinder body through radial bolts. The two columns are respectively provided with a mounting hole 23, and the two ends of the outer peripheral surface of the cylinder, which are respectively close to the cylinder, are respectively provided with a locking screw hole 24.

It is understood that the shaft 20 may be a non-detachable component, depending on the actual requirements.

Referring to fig. 15, the calibration apparatus 100 further includes two locking knobs 30. The locking knobs 30 are used to lock the targets 200 to both ends of the rotation shaft 20.

Each locking knob 30 includes a knob body 32 and a threaded rod 34. One end of the screw 34 is fixedly connected to the knob body 32, and a first flat portion 340 is provided on an end surface of the other end of the screw 34.

Referring to fig. 16 and 17, each target 200 includes a target body 202 and a mounting shaft 204. The target body 202 is substantially rectangular, and a calibration pattern 2020 for identification by the detection apparatus 300 is provided on the target body 202.

The calibration pattern 2020 is used for position information of the target 200 only, and the position indication pattern may be a circle, a rectangle, or a combination thereof, or other patterns, such as a two-dimensional code or a barcode, which can be used for the detection apparatus 300 to acquire target position information through the camera 302.

One end of the mounting shaft 204 is inserted into the target body 202 and locked by radial bolts to be fixed to the target body 202. Specifically, a plurality of spherical dimples are provided on the outer peripheral surface of one end of the mounting shaft 204, which is inserted into the target body 202, and are spaced apart from each other in the circumferential direction of the mounting shaft 204, and radial bolts are inserted into the spherical dimples.

A second flat surface portion 2040 is provided on the outer peripheral surface of the other end of the mounting shaft 204.

Referring to fig. 18 to 20, when the two locking knobs 30 lock the two targets 200 at two ends of the rotating shaft 20, the following steps are performed:

taking one of the locking knobs 30 to lock one of the targets 200 at one end of the rotating shaft 20 as an example, the mounting shaft 204 of the target 200 is inserted into the mounting hole 23, when the target is inserted into the mounting hole, the target 200 is rotated around the center line of the mounting shaft 204, so that the position of the second plane portion 2040 of the mounting shaft 204 approximately corresponds to the position of the locking screw hole 24, the screw 34 of the locking knob 30 is screwed into the locking screw hole 24, and when the target is screwed into the mounting hole, the first plane portion 340 of the screw 34 is abutted against the second plane portion 2040 of the mounting shaft 204, so that the angular deviation of the target 200 can be automatically corrected, and the assembly error can be avoided. Because the two locking screw holes 24 are positioned on a straight line parallel to the central line of the rotating shaft 20, when the two locking screw holes 24 are machined, only translation of a machine tool is needed, and the rotating shaft 20 does not need to do circular motion, so that the angular deviation of the two locking screw holes 24 in the circumferential direction of the rotating shaft 20 is avoided, the angular precision of the two locking screw holes 24 is ensured, and machining errors can be avoided.

During calibration, with the aid of the calibration pattern on the target 200, after the camera 302 of the detection device 300 captures the calibration pattern of the target 200, the processor of the detection device 300 may calculate the supplement required by the camera 302 with respect to factory parameters, and after obtaining the compensation amount required by the camera 302, may adjust the parameters of the camera 302 in the detection device 300 according to the compensation amount, thereby completing calibration of the camera 302.

Referring to fig. 21, in some embodiments, positioning holes 25 are respectively formed on two end surfaces of the shaft 20. The positioning hole 25 is provided on one side of the mounting hole 23.

Each target 200 also includes a locating pin 206. The length direction of the positioning pin 206 is parallel to the center line of the mounting shaft 20, and the positioning pin 206 and the mounting shaft 204 are provided protruding on the same surface of the target body 202.

The positioning pin 206 is inserted into the positioning hole 25 to achieve initial positioning of the target 200 and the rotation shaft 20.

In some embodiments, a pin hole 208 is formed in the target body 202. One end of the positioning pin 206 is inserted into the pin hole 208 and is interference-fitted with the pin hole 208 to be fixed to the target body 202. The number of pin holes 208 may be multiple to facilitate adjusting the position of the locating pin 206 relative to the target body 202.

When there is an angular deviation between the two targets 200, the two arrows are not on the same straight line, as shown in fig. 22 to 24.

The angular deviation between the two targets 200 can be solved by:

the detection device 300 reads the angle value A of the two targets 200₁、A₂；

Calculating the difference value | A between the angle values of the two targets 200₁-A₂|；

Judging the angle value difference value | A₁-A₂Whether | is less than a threshold;

if not, the relative positions of the target 200 and the rotating shaft 20 are adjusted until the angle value difference | A₁-A₂| is less than a threshold;

the two triangular arrows are adjusted to be on the same line as shown in fig. 25 to fig. 27.

In some embodiments, adjusting the relative positions of the target 200 and the shaft 20 includes:

different targets 200 and/or spindles 20 are replaced.

When the rotating shaft 20 or the target 200 is machined, a defect may exist in one rotating shaft 20 or the target 200, and an angular deviation exists between the two targets 200 after assembly, and the problem can be solved by replacing the target 200 and/or the rotating shaft 20.

In other embodiments, adjusting the relative positions of the target 200 and the shaft 20 includes:

in each target 200, the pin hole into which the positioning pin 206 is inserted is replaced.

When the target body 202 is machined, there may be a deviation in the position of a pin hole with respect to the target body 202, and when the positioning pin 206 is inserted into the deviated pin hole, an angular deviation between the two targets 200 will occur, and this problem can be solved by replacing the pin hole into which the positioning pin 206 is inserted.

Compared with the prior art, in the calibration system, the calibration system and the method for eliminating the angle error provided by the embodiment of the utility model, the position of the second plane part of the mounting shaft approximately corresponds to the position of the locking screw hole, the screw rod of the locking knob is screwed into the locking screw hole, and when the screw rod is screwed in place, the first plane part of the screw rod is attached to the second plane part of the mounting shaft, so that the angle deviation of the target is automatically corrected, and the assembly error can be avoided. Because the two locking screw holes are positioned on a straight line parallel to the central line of the rotating shaft, only translation of a machine tool is needed when the two locking screw holes are processed, and the rotating shaft does not need to do circular motion, so that the angle deviation of the two locking screw holes in the circumferential direction of the rotating shaft is avoided, the precision of the two locking screw holes in the angle is ensured, and the processing error can be avoided. Therefore, the problem that the target at two ends always has angle errors due to processing and assembling errors of materials is solved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the utility model, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity; while the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A calibration system, comprising:

the calibration equipment comprises a base, a rotating shaft and two locking knobs, wherein the rotating shaft is arranged on the base, can rotate relative to the base around the center line of the rotating shaft, two mounting holes are respectively formed in two end faces of the rotating shaft, the center line of the mounting holes coincides with the center line of the rotating shaft, two locking screw holes are respectively formed in the positions, close to two ends of the rotating shaft, of the outer peripheral surface of the rotating shaft, the locking screw holes are communicated with the mounting holes, the two locking screw holes are arranged on a straight line parallel to the center line of the rotating shaft, each locking knob comprises a knob main body and a screw rod, one end of each screw rod is connected with the knob main body, and a first plane part is arranged on the end face of the other end of each screw rod; and

2. The calibration system as set forth in claim 1, wherein the base comprises two support members and a connecting rod;

3. The calibration system as claimed in claim 2, wherein a V-shaped groove is formed on each of the upper portions of the two supporting members;

the V-shaped groove comprises two groove walls, an inner angle is formed at the joint of the two groove walls, and the two groove walls bear the rotating shaft.

4. The calibration system according to claim 3, wherein each of the two support members is provided with a limit bracket;

5. The calibration system as claimed in claim 4, wherein a bushing is respectively sleeved on two portions of the rotating shaft near two ends of the rotating shaft, the bushings are fixed on the rotating shaft, and the two groove walls support the rotating shaft through the bushings.

6. The calibration system as recited in claim 5, wherein the bushing comprises a first section, a second section, and a third section that are connected in series;

7. The calibration system as set forth in claim 6, wherein a swing member is disposed on the sleeve, the swing member being fixedly connected to the sleeve, the swing member being kidney-shaped.

8. The system of claim 7, wherein the swing member is sleeved outside the third section and secured to an end surface of the second section by a radial bolt.

9. The calibration system as claimed in any one of claims 1 to 8, wherein positioning holes are respectively formed on two end faces of the rotating shaft; each target further comprises a positioning pin, the positioning pin and the mounting shaft are arranged on the same surface of the target main body in a protruding mode, and the positioning pin is used for being inserted into the positioning hole.

10. A calibration system, comprising:

a calibration system as defined in any one of claims 1 to 9; and