Scanning bed correction mechanism and correction method

Abstract

A scanning bed correction mechanism and correction method, comprising a scanning bed body, a fixed base plate and a device mainframe with a laser emission module, wherein a mounting plate is fixedly arranged at the bottom of the scanning bed body, a first pin is slidably arranged at the rear end of the fixed base plate away from the device mainframe, the first pin is inserted at one end of the mounting plate and is rotatably connected to the mounting plate, a plurality of second pins are slidably arranged at the front end of the fixed base plate close to the device mainframe, the second pins are inserted at the other end of the mounting plate and are slidably connected to the other end of the mounting plate, and two groups of laser receiving modules are provided on the axis alignment device along the extension direction of the scanning bed body; the scanning bed body is driven to move or rotate by arranging the first driving mechanism and the second driving mechanism, thereby eliminating the operation of manually moving the scanning bed body, reducing manpower input, and achieving fast and accurate correction.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a scanning bed calibration mechanism and calibration method. Background Art

[0002] CT (Computed Tomography) technology is an imaging diagnostic technology that uses X-rays to perform tomographic imaging of the human body.

[0003] The existing CT scanning equipment includes a CT mainframe and a scanning bed. When in use, the positions of the scanning bed and the CT mainframe need to be corrected so that the direction of travel of the scanning bed coincides with the axis of the CT mainframe. In the prior art, when correcting the position of the scanning bed, the scanning bed is usually fixed on the ground through a fixed base plate. During installation, workers constantly visually check whether the central axis of the scanning bed coincides with the axis of the CT mainframe, or measure the distance through a tape measure or other equipment to determine whether they coincide. If they do not coincide, the position of the scanning bed must be moved again until the scanning bed reaches the standard. However, the scanning bed is heavy and requires the cooperation of multiple people when moving it, and even requires equipment such as a crowbar for support. This process must be repeated many times to achieve correction. This adjustment method is too complicated and consumes too much manpower and material resources.

[0004] Therefore, the inventor needs to design a new scanning bed correction mechanism and correction method to overcome the above problems. Summary of the invention

[0005] The main purpose of the present application is to provide a scanning bed calibration mechanism and calibration method to solve the problem in the related art that the scanning bed calibration is troublesome and wastes manpower and material resources.

[0006] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides a scanning bed correction mechanism, comprising a scanning bed body, a fixed bottom plate and a device mainframe having a laser emission module, wherein a mounting plate is fixedly arranged at the bottom of the scanning bed body, a first pin is slidably arranged at a rear end of the fixed bottom plate away from the device mainframe, the first pin is inserted at one end of the mounting plate and is rotatably connected to the mounting plate, a plurality of second pins are slidably arranged at a front end of the fixed bottom plate close to the device mainframe, the second pins are inserted at the other end of the mounting plate and are slidably connected to the other end of the mounting plate, a first driving mechanism is fixedly arranged between the first pin and the fixed bottom plate, and a second driving mechanism is fixedly arranged between the second pin and the fixed bottom plate;

[0007] It also includes an axis alignment device, which is fixedly arranged on the top of the scanning bed body. The axis alignment device is provided with two groups of laser receiving modules along the extension direction of the scanning bed body.

[0008] Preferably, the first driving mechanism includes a first motor and a first slide rail fixedly arranged on the fixed base plate, a first slider is slidably arranged on the first slide rail, the first pin shaft is fixedly arranged on the first slider, a first lead screw is fixedly arranged on the output shaft of the first motor, and the first slider is threadedly connected to the first lead screw.

[0009] Preferably, there are two second pin shafts, two slide grooves are provided on the mounting plate, and the two second pin shafts are slidably connected to the two slide grooves respectively.

[0010] Preferably, the second driving mechanism includes a second motor, a second slide rail and a mounting seat fixedly arranged on the fixed base plate, two second sliders are slidably arranged on the second slide rail, two second pin shafts are respectively fixedly arranged on the two second sliders, a second lead screw is rotatably arranged on the mounting seat, a transmission mechanism is arranged between the second lead screw and the second motor, and the two second sliders are both threadedly connected to the second lead screw.

[0011] Preferably, a slot is provided on the scanning bed body, a latch is fixedly provided on the axis alignment device, the axis alignment device is inserted into the slot through the latch, and the slot is provided at one end close to the second pin shaft.

[0012] Preferably, the axis alignment device further comprises a device body, the latch is fixedly arranged on the device body, and an operation panel is also fixedly arranged on the device body.

[0013] Preferably, the laser receiving module includes multiple laser receiving points, the arrangement direction of each group of laser receiving points is not parallel to the extension direction of the scanning bed, the positions of the laser receiving points on the two groups of laser receiving modules correspond one to one, and the connecting line between the one-to-one corresponding laser receiving points on the two groups of laser receiving modules is parallel to the extension direction of the scanning bed.

[0014] In a second aspect, the present application provides a scanning bed calibration method, which is applied to the scanning bed calibration mechanism as described above, and the calibration method comprises:

[0015] S1, installing the scanning bed body on the fixed base plate, and installing the axis alignment device on the scanning bed body;

[0016] S2, turning on the laser emission module on the device host to emit a laser beam onto the scanning bed body, the projection of the laser beam falls on the axis alignment device and is received by the laser receiving module;

[0017] S3, starting the second motor to drive the scanning bed body to rotate, so that the laser receiving point in the laser receiving module near the front end of the device host that coincides with the axis of the scanning bed body receives the laser beam emitted by the laser emitting module;

[0018] S4, starting the first motor to drive the scanning bed body to move away from one end of the device host, so that the laser receiving point in the laser receiving module at the rear end that coincides with the axis of the scanning bed body receives the laser beam emitted by the laser emitting module;

[0019] S5. In S4, the position of the laser receiving module at the front end changes during the movement, so that the laser receiving point coincident with the axis of the scanning bed body cannot receive the laser beam. At this time, repeat step S3 and restart the second motor to make the laser receiving point coincident with the axis of the scanning bed body in the laser receiving module at the front end receive the laser beam again. Repeat step S4 and adjust the first motor to make the laser receiving point coincident with the axis of the scanning bed body in the laser receiving module at the rear end receive the laser beam emitted by the laser emitting module. Repeat S3 and S4 continuously until the receiving points in the two laser receiving modules that coincide with the axis of the scanning bed body receive the laser beam, and the scanning bed body is calibrated.

[0020] In a third aspect, the present application provides a scanning bed calibration method, which is applied to the scanning bed calibration mechanism as described above, and the calibration method comprises:

[0021] S1, installing the scanning bed body on the fixed base plate, and installing the axis alignment device on the scanning bed body;

[0022] S2, turning on the laser emission module on the device host to emit a laser beam onto the scanning bed body, the projection of the laser beam falls on the axis alignment device and is received by the laser receiving module;

[0023] S3, recording the positions of the laser receiving points where the two laser receiving modules receive the laser beams;

[0024] S4, starting the first motor and the second motor at the same time, driving the first slider and the second slider to slide in opposite directions until the two corresponding laser receiving points on the two laser receiving modules receive the laser beam at the same time, and recording the positions of the laser receiving points that receive the laser beam;

[0025] S5. Start the first motor and the second motor at the same time to drive the mounting plate to translate until the laser receiving points on the two laser receiving modules that coincide with the axis of the scanning bed body receive the laser beam, and the scanning bed body is calibrated.

[0026] Compared with the prior art, the scanning bed correction mechanism and correction method provided by the present invention have the following beneficial effects:

[0027] By setting up a first driving mechanism and a second driving mechanism to drive the scanning bed body to move or rotate, the operation of manually moving the scanning bed body is eliminated, and the manpower input is reduced. By setting up an axis alignment device, it is used to determine whether the scanning bed is calibrated with the equipment host. The calibration is fast and accurate, which simplifies the calibration steps and improves the calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0029] Figure 1 is a step diagram of a correction method in Embodiment 1 of the present invention;

[0030] Figure 2 It is the overall structural diagram of the present invention;

[0031] Figure 3 It is an exploded view of the scanning bed body and the fixed bottom plate of the present invention;

[0032] Figure 4 It is a structural diagram of the fixed bottom plate of the present invention;

[0033] Figure 5 This is a top structural diagram of the scanning bed body of the present invention;

[0034] Figure 6 It is a step diagram of the correction method in the second embodiment of the present invention.

[0035] Among them: 1. Scanning bed body; 2. Fixed bottom plate; 3. Laser emission module; 4. Equipment host; 5. Mounting plate; 6. First pin shaft; 7. Second pin shaft; 8. Axis alignment device; 9. Laser receiving module; 10. First motor; 11. First slide rail; 12. First slider; 13. First lead screw; 14. Slide groove; 15. Second motor; 16. Second slide rail; 17. Mounting seat; 18. Second slider; 19. Second lead screw; 20. Transmission mechanism; 21. Slot; 22. Pin; 23. Equipment body; 24. Operation panel; 25. Laser receiving point; 26. Laser beam. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", etc. in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0040] In addition, the term "plurality" shall mean two or more.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] Embodiment 1:

[0043] like Figures 1 to 5As shown, a scanning bed correction mechanism comprises a scanning bed body 1, a fixed base plate 2 and a device host 4 with a laser emission module 3, wherein a mounting plate 5 is fixedly arranged at the bottom of the scanning bed body 1, a first pin shaft 6 is slidably arranged at the rear end of the fixed base plate 2 away from the device host 4, the first pin shaft 6 is inserted at one end of the mounting plate 5 and is rotatably connected to the mounting plate 5, a plurality of second pin shafts 7 are slidably arranged at the front end of the fixed base plate 2 close to the device host 4, the second pin shaft 7 is inserted at the other end of the mounting plate 5 and is slidably connected to the other end of the mounting plate 5, a first driving mechanism is fixedly arranged between the first pin shaft 6 and the fixed base plate 2, and a second driving mechanism is fixedly arranged between the second pin shaft 7 and the fixed base plate 2; and an axis alignment device 8 is also included, the axis alignment device 8 is fixedly arranged at the top of the scanning bed body 1, and two groups of laser receiving modules 9 are provided on the axis alignment device 8 along the extension direction of the scanning bed body 1; when working, the device host 4 and the fixed base plate 2 are fixedly mounted On the ground, when installing the equipment host 4 and the fixed base plate 2, there is no need to calibrate the installation direction of the fixed base plate 2 and the setting host too much, as long as the two are roughly perpendicular, and then the scanning bed body 1 installed with the axis alignment device 8 is installed on the fixed base plate 2 through the first pin shaft 6 and the second pin shaft 7. When adjusting the position of the scanning bed body 1, turn on the laser emitting module 3 to emit a laser beam 26 to the bed surface of the scanning bed body 1. The laser beam 26 is located on the plumb plane where the central axis of the equipment host 4 is located. The two laser receiving modules 9 are used to receive the laser beam 26. The line connecting the central axes of the two laser receiving modules 9 coincides with the axis of the scanning bed body 1. The first driving mechanism and the second driving mechanism adjust the position of the mounting plate 5 to make the mounting plate 5 rotate, move, etc., until the positions where the two laser receiving modules 9 receive the laser beam 26 are both in the middle position. At this time, the line connecting the central points of the two laser receiving modules 9 coincides with the plane where the laser beam 26 is located, that is, the central axis of the scanning bed coincides with the plumb plane where the axis of the equipment host 4 is located, and the calibration of the scanning bed is completed.

[0044] By setting up the first driving mechanism and the second driving mechanism to drive the scanning bed body 1 to move or rotate, the operation of manually moving the scanning bed body 1 is eliminated, and the manpower input is reduced. By setting up the axis alignment device 8, it is used to determine whether the scanning bed is calibrated with the equipment host 4. The calibration is fast and accurate, the calibration steps are simplified, and the calibration efficiency is improved.

[0045] The first driving mechanism includes a first motor 10 and a first slide rail 11 fixedly arranged on the fixed base plate 2, a first slider 12 is slidably arranged on the first slide rail 11, the first pin shaft 6 is fixedly arranged on the first slider 12, a first lead screw 13 is fixedly arranged on the output shaft of the first motor 10, and the first slider 12 is threadedly connected with the first lead screw 13; when working, the first motor 10 drives the first lead screw 13 to rotate, so that the first slider 12 slides on the first slide rail 11, thereby driving the rear end of the mounting plate 5 to move, and when the front end of the mounting plate 5 does not move, the mounting plate 5 also rotates with the first pin shaft 6.

[0046] There are two second pin shafts 7, and two slide grooves 14 are provided on the mounting plate 5. The two second pin shafts 7 are respectively slidably connected with the two slide grooves 14; the second driving mechanism includes a second motor 15, a second slide rail 16 and a mounting seat 17 fixedly arranged on the fixed base plate 2, two second sliders 18 are slidably arranged on the second slide rail 16, and the two second pin shafts 7 are respectively fixedly arranged on the two second sliders 18, and a second lead screw 19 is rotatably arranged on the mounting seat 17, and a transmission mechanism 20 is provided between the second lead screw 19 and the second motor 15, and the two second sliders 18 are both screwed with the second lead screw 19 When working, two second pins 7 are set to form a plane with a first pin 6 at three points, which makes the supporting effect on the mounting plate 5 more stable, and can prevent the scanning bed body 1 from tipping over when the mounting plate 5 moves or rotates. The second motor 15 drives the second lead screw 19 to rotate through the transmission mechanism 20. The transmission mechanism 20 here can be a synchronous belt mechanism, a gear mechanism, etc. Any mechanism that can drive the second motor 15 to drive the second lead screw 19 to rotate can be used here. It should be noted that the transmission mechanism 20 is set because the length of the fixed base plate 2 along the extension direction of the lead screw is limited. In order to reduce the size of the fixed base plate 2, the second motor 15 is set parallel to the lead screw. When the first motor 10 is not working and the second motor 15 is working, relative sliding will occur between the second pin 7 and the mounting plate 5. At this time, the second pin 7 slides in the slide groove 14.

[0047] The scanning bed body 1 is provided with a slot 21, and the axis alignment device 8 is fixedly provided with a latch 22. The axis alignment device 8 is inserted into the slot 21 through the latch 22. The slot 21 is provided at one end close to the second pin shaft 7. When the axis alignment device 8 is installed during operation, the latch 22 can be inserted into the slot 21, which is convenient for removing the axis alignment device 8 after the calibration is completed. It should be noted that the latch 22 and the slot 21 here should be able to limit the position of the axis alignment mechanism, so that the axis of the axis alignment mechanism and the plumb line where the axis of the scanning bed body 1 is located are in the same plane.

[0048] The axis alignment device 8 also includes a device body 23, the latch 22 is fixedly arranged on the device body 23, and an operation panel 24 is also fixedly arranged on the device body 23; the laser receiving module 9 includes a plurality of laser receiving points 25, and the arrangement direction of each group of the laser receiving points 25 is not parallel to the extension direction of the scanning bed, and the positions of the laser receiving points 25 on the two groups of the laser receiving modules 9 correspond one to one, and the connection line between the one-to-one corresponding laser receiving points 25 on the two groups of the laser receiving modules 9 is parallel to the extension direction of the scanning bed; when working According to the principle that two points determine a straight line, the laser receiving point 25 receives the laser beam 26. When the corresponding laser receiving points 25 on the two groups of laser receiving modules 9 receive the laser beam 26 at the same time, it can be said that the axis of the scanning bed body 1 is parallel to the plumb plane where the axis of the equipment host 4 is located. When the laser receiving points 25 on the two laser receiving modules 9 that are on the plumb plane where the axis of the scanning bed is located receive the laser beam 26 at the same time, it means that the axis of the scanning bed body 1 coincides with the plumb plane where the axis of the equipment host 4 is located. At this time, the scanning bed body 1 is in a calibration completed state.

[0049] A scanning bed calibration method is applied to the scanning bed calibration mechanism as described above, the calibration method comprising: S1, installing the scanning bed body 1 on the fixed base plate 2, and installing the axis alignment device 8 on the scanning bed body 1; S2, turning on the laser emission module 3 on the device host 4, emitting a laser beam 26 to the scanning bed body 1, the projection of the laser beam 26 falls on the axis alignment device 8, and is received by the laser receiving module 9; S3, starting the second motor 15, driving the scanning bed body 1 to rotate, so that the laser receiving point 25 in the laser receiving module 9 near the front end of the device host 4 that coincides with the axis of the scanning bed body 1 receives the laser beam 26 emitted by the laser emission module 3; S4, starting the first motor 10, driving the scanning bed body 1 to move away from the end of the device host 4, so that the laser receiving point 25 in the laser receiving module 9 at the rear end that coincides with the axis of the scanning bed body 1 The laser receiving point 25 at the front end receives the laser beam 26 emitted by the laser emitting module 3; S5. In S4, the position of the laser receiving module 9 at the front end changes during the movement, so that the laser receiving point 25 coinciding with the axis of the scanning bed body 1 cannot receive the laser beam 26. At this time, repeat step S3, restart the second motor 15, so that the laser receiving point 25 coinciding with the axis of the scanning bed body 1 in the laser receiving module 9 at the front end receives the laser beam 26 again, and then repeat step S4, adjust the first motor 10 so that the laser receiving point 25 coinciding with the axis of the scanning bed body 1 in the laser receiving module 9 at the rear end receives the laser beam 26 emitted by the laser emitting module 3, and repeat S3 and S4 continuously until the receiving points coinciding with the axis of the scanning bed body 1 in the two laser receiving modules 9 receive the laser beam 26, and the scanning bed body 1 is calibrated.

[0050] During operation, the receiving point in the middle of each group of laser receiving points 25 can be set on the plumb plane where the axis of the scanning bed body 1 is located. In this way, in step S3, the middle laser receiving point 25 can be used as the base point, and then the position of the laser receiving point 25 in the front laser receiving module 9 that initially receives the laser beam 26 is compared with the position of the middle receiving point to obtain the difference, and then the rotation direction of the second motor 15 in step S3 can be controlled by the difference, for example, if the difference is positive, the second motor 15 rotates forward, and if the difference is negative, the second motor 15 rotates reversely, etc. Similarly, the first motor 10 in step S4 can be controlled by the same control logic, so that the correction method here can be set on the chip by programming, and the chip is electrically connected to the first motor 10, the second motor 15 and the axis alignment device 8, and the alignment of the scanning bed is automatically controlled by the chip.

[0051] Embodiment 2: Figure 6As shown, the difference between this embodiment and the first embodiment is that: a scanning bed calibration method is applied to the scanning bed calibration mechanism as described above, and the calibration method comprises: S1, installing the scanning bed body 1 on the fixed base plate 2, and installing the axis alignment device 8 on the scanning bed body 1; S2, turning on the laser emission module 3 on the device host 4, emitting a laser beam 26 to the scanning bed body 1, and the projection of the laser beam 26 falls on the axis alignment device 8 and is received by the laser receiving module 9; S3, recording the positions of the two laser receiving points 25 where the laser receiving modules 9 receive the laser beam 26 S4, start the first motor 10 and the second motor 15 at the same time, drive the first slider 12 and the second slider 18 to slide in opposite directions, until the two corresponding laser receiving points 25 on the two laser receiving modules 9 receive the laser beam 26 at the same time, and record the position of the laser receiving point 25 that receives the laser beam 26; S5, start the first motor 10 and the second motor 15 at the same time, drive the mounting plate 5 to translate, until the laser receiving points 25 on the two laser receiving modules 9 that coincide with the axis of the scanning bed body 1 receive the laser beam 26, and the scanning bed body 1 is calibrated.

[0052] During operation, the control chip can be set to determine the positions of the laser receiving points 25 on the two laser receiving modules 9 that receive the laser beams 26. Taking the position of the middle laser receiving point 25 as a reference, the difference between the two laser receiving points 25 that receive the laser beams 26 and the middle laser receiving point 25 is obtained. For example, the front end difference is 3 cm, and the rear end difference is 1 cm. At this time, the first motor 10 and the second motor 15 are controlled to rotate so that the corresponding laser receiving points 25 with a difference of 2 cm from the middle laser receiving point 25 at both ends receive the laser beams 26 at the same time, and step S4 is completed. Then, the entire mounting plate 5 is translated so that the two middle laser receiving points 25 receive the beams at the same time. It should be noted that the translation in step S5 is to translate the mounting plate 5 in a direction perpendicular to the axis of the device host 4. In actual operation, it can also be understood as translating it along the first slide rail 11 and the second slide rail 16. This is because in the actual movement process, due to the first slide The rail 11 and the second rail 16 are parallel to each other. Therefore, it is only necessary to ensure that the moving speeds of the first slider 12 and the second slider 18 on the first rail 11 and the second rail 16 are equal to ensure that the speeds of the front and rear ends of the scanning bed are also equal during movement. As a result, during the movement of the scanning bed body 1, the connection line between the two corresponding laser receiving points 25 is always parallel to the axis of the device host 4 without deflection. Here, if there is an error in the installation of the fixed base plate 2, the translation of the scanning bed body 1 here includes both translation in the direction parallel to the axis of the device host 4 and translation in the direction perpendicular to the axis of the device host 4. However, the translation in the direction parallel to the axis of the device host 4 does not affect the alignment operation of the scanning bed body 1. As long as the scanning bed body is translated in the direction perpendicular to the axis of the device host 4, the alignment adjustment of the scanning bed body 1 can be achieved. It can be achieved by moving until the two laser receiving points 25 in the middle receive the laser beam 26 at the same time and then stopping.

[0053] Compared with the first embodiment: the calibration method adopted in this embodiment is to first adjust the mounting plate 5 to be parallel to the axis of the device mainframe 4, and then translate it to a position that coincides with the axis of the device mainframe 4, thereby completing the calibration. The calibration method adopted in the first embodiment is that the laser receiving points 25 located in the middle at both ends alternately receive the laser beam 26, so that the line between the two middle laser receiving points 25 continuously approaches the axis of the device mainframe 4 until it completely coincides. Both calibration methods can achieve the calibration of the scanning bed body 1.

[0054] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A scanning bed calibration mechanism, characterized in that: The invention comprises a scanning bed body (1), a fixed base plate (2) and a device main body (4) having a laser emission module (3), wherein a mounting plate (5) is fixedly arranged at the bottom of the scanning bed body (1), a first pin shaft (6) is slidably arranged at a rear end of the fixed base plate (2) away from the device main body (4), the first pin shaft (6) is inserted into one end of the mounting plate (5) and is rotatably connected to the mounting plate (5), a plurality of second pin shafts (7) are slidably arranged at a front end of the fixed base plate (2) close to the device main body (4), the second pin shafts (7) are inserted into the other end of the mounting plate (5) and are slidably connected to the other end of the mounting plate (5), a first driving mechanism is fixedly arranged between the first pin shaft (6) and the fixed base plate (2), and a second driving mechanism is fixedly arranged between the second pin shaft (7) and the fixed base plate (2), the first driving mechanism and the second driving mechanism are used to drive the scanning bed body (1) to move and rotate; It also comprises an axis alignment device (8), the axis alignment device (8) being fixedly arranged on the top of the scanning bed body (1), and having two groups of laser receiving modules (9) on the axis alignment device (8) along the extension direction of the scanning bed body (1); The first driving mechanism comprises a first motor (10) and a first slide rail (11) fixedly arranged on the fixed base plate (2); a first slider (12) is slidably arranged on the first slide rail (11); the first pin shaft (6) is fixedly arranged on the first slider (12); a first lead screw (13) is fixedly arranged on the output shaft of the first motor (10); and the first slider (12) is threadedly connected to the first lead screw (13); There are two second pin shafts (7) in total, and two slide grooves (14) are provided on the mounting plate (5). The two second pin shafts (7) are slidably connected to the two slide grooves (14) respectively, and the extension direction of the two slide grooves (14) is the length direction of the mounting plate (5).

2. A scanning bed calibration mechanism as claimed in claim 1, characterized in that: The second driving mechanism comprises a second motor (15), a second slide rail (16) and a mounting seat (17) fixedly arranged on the fixed base plate (2); two second sliders (18) are slidably arranged on the second slide rail (16); two second pin shafts (7) are respectively fixedly arranged on the two second sliders (18); a second lead screw (19) is rotatably arranged on the mounting seat (17); a transmission mechanism (20) is arranged between the second lead screw (19) and the second motor (15); and the two second sliders (18) are both threadedly connected to the second lead screw (19).

3. A scanning bed calibration mechanism as claimed in claim 2, characterized in that: The scanning bed body (1) is provided with a slot (21), the axis alignment device (8) is fixedly provided with a latch (22), the axis alignment device (8) is inserted into the slot (21) via the latch (22), and the slot (21) is provided at one end close to the second pin shaft (7).

4. A scanning bed calibration mechanism as claimed in claim 3, characterized in that: The axis alignment device (8) further comprises a device body (23), the latch (22) being fixedly arranged on the device body (23), and an operation panel (24) being also fixedly arranged on the device body (23).

5. A scanning bed calibration mechanism as claimed in claim 3, characterized in that: The laser receiving module (9) comprises a plurality of laser receiving points (25), the arrangement direction of each group of the laser receiving points (25) is not parallel to the extension direction of the scanning bed, the positions of the laser receiving points (25) on the two groups of the laser receiving modules (9) correspond one to one, and the connection line between the one-to-one corresponding laser receiving points (25) on the two groups of the laser receiving modules (9) is parallel to the extension direction of the scanning bed.

6. A scanning bed calibration method, applied to the scanning bed calibration mechanism as claimed in claim 5, characterized in that: The correction method comprises: S1, installing the scanning bed body (1) on the fixed base plate (2), and installing the axis alignment device (8) on the scanning bed body (1); S2, turning on the laser emission module (3) on the device host (4) to emit a laser beam (26) toward the scanning bed body (1); the projection of the laser beam (26) falls on the axis alignment device (8) and is received by the laser receiving module (9); S3, starting the second motor (15) to drive the scanning bed body (1) to rotate, so that the laser receiving point (25) in the laser receiving module (9) near the front end of the device main body (4) and coincident with the axis of the scanning bed body (1) receives the laser beam (26) emitted by the laser emitting module (3); S4, starting the first motor (10) to drive the scanning bed body (1) to move away from one end of the device main unit (4), so that the laser receiving point (25) in the laser receiving module (9) at the rear end, which coincides with the axis of the scanning bed body (1), receives the laser beam (26) emitted by the laser emitting module (3); S5. In S4, the position of the laser receiving module (9) at the front end changes during the movement, so that the laser receiving point (25) that coincides with the axis of the scanning bed body (1) cannot receive the laser beam (26). At this time, step S3 is repeated to restart the second motor (15) so that the laser receiving point (25) that coincides with the axis of the scanning bed body (1) in the front end laser receiving module (9) receives the laser beam (26) again. Then, step S4 is repeated to adjust the first motor (10) so that the laser receiving point (25) that coincides with the axis of the scanning bed body (1) in the rear end laser receiving module (9) receives the laser beam (26) emitted by the laser emitting module (3). S3 and S4 are repeated continuously until the receiving points that coincide with the axis of the scanning bed body (1) in the two laser receiving modules (9) receive the laser beam (26), and the scanning bed body (1) is calibrated.

7. A scanning bed calibration method, applied to the scanning bed calibration mechanism as claimed in claim 5, characterized in that: The correction method comprises: S1, installing the scanning bed body (1) on the fixed base plate (2), and installing the axis alignment device (8) on the scanning bed body (1); S2, turning on the laser emission module (3) on the device host (4) to emit a laser beam (26) toward the scanning bed body (1); the projection of the laser beam (26) falls on the axis alignment device (8) and is received by the laser receiving module (9); S3, recording the positions of the laser receiving points (25) where the two laser receiving modules (9) receive the laser beams (26); S4, starting the first motor (10) and the second motor (15) simultaneously, driving the first slider (12) and the second slider (18) to slide in opposite directions until the two corresponding laser receiving points (25) on the two laser receiving modules (9) simultaneously receive the laser beam (26), and recording the position of the laser receiving point (25) that receives the laser beam (26); S5. Start the first motor (10) and the second motor (15) simultaneously to drive the mounting plate (5) to translate until the laser receiving points (25) on the two laser receiving modules (9) that coincide with the axis of the scanning bed body (1) receive the laser beam (26), thereby achieving calibration of the scanning bed body (1).

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