CN220785181U - Calibrating device for elliptical printing machine - Google Patents

Abstract

The utility model relates to a calibrating device for an elliptical printing machine, which comprises a detection plate and a visual detection mechanism arranged on the detection plate, wherein the visual detection mechanism comprises a camera, a mounting seat arranged on the detection plate, an adjusting component connected with the mounting seat and the camera, a light source connected with the mounting seat, a control component and a power supply component which are respectively arranged on the detection plate, and the light source, the camera and the power supply component are respectively and electrically connected with the control component. The utility model has simple and compact structure and high degree of automation; the calibration device is arranged behind the cross beam of the elliptical printing machine, so that the calibration can be performed, and the device is convenient to install and cooperate with the elliptical printing machine. In the calibration process, when the detection plate moves to the lower part of the reference screen, the position coordinates of the marking points of the reference screen can be obtained through shooting, so that the screen calibration method has the advantages of simple step, convenient and quick adjustment and simplified structure of the detection plate.

Description

Calibrating device for elliptical printing machine

Technical Field

The utility model relates to the technical field of screen printing, in particular to a calibrating device for an elliptical printing machine.

Background

The elliptical printing machine is an automatic printing device, is suitable for various printing materials, glue drop, water slurry, printing ink and the like, and is suitable for plane screen printing of cut pieces of clothing, ready-made clothes, trousers, socks, umbrellas and the like; the printing technology suitable for the printing technology comprises the following steps: the thick plate and the discharge are matched with a pressing machine to perform gold stamping, silver stamping and the like. The elliptical printing machine requires calibration of the screen position prior to printing.

Patent application number is CN20201512780. X, patent application name is an elliptical printing machine screen plate alignment method and an alignment system, which are disclosed in the patent: the alignment system includes: the screen printing plate is provided with at least two marking points and is movably arranged below one printing head of the elliptical printing machine; the visual components are respectively corresponding to marking points on the screen, the visual components are fixed on a platen of the elliptical printing machine, the platen is positioned below the screen, the visual components comprise corner coaxial light sources, lenses and cameras, light energy emitted by the corner coaxial light sources passes through positioning holes on the platen to irradiate the screen, light rays reflected by the screen reach the cameras after passing through the corner coaxial light sources and the lenses, and the cameras are used for shooting the screen.

This patent application counterpoint system is in the in-process of carrying out the calibration to the half tone, and the mark point on the half tone exposes to the camera through the locating hole, needs to carry out coarse adjustment to the position of platform version and half tone to make the mark point be located the top of locating hole, if not adjust the half tone, when the mark point on the half tone is not in the top of locating hole, the platen can shelter from the camera, and the camera can't directly shoot the position of the mark point on the half tone. The calibration steps of the screen printing plate of the patent application are complex, the structure of the platform printing plate is complex, and the calibration can be performed only after the position between the platform printing plate and the screen printing plate is adjusted preliminarily, so that the calibration difficulty is increased. Thus, the drawbacks are quite apparent and there is a need to provide a solution.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a calibration device for an elliptical printing machine.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the calibrating device for the elliptical printing machine comprises a detecting plate and a visual detecting mechanism arranged on the detecting plate, wherein the visual detecting mechanism comprises a camera, a mounting seat arranged on the detecting plate, an adjusting component connected with the mounting seat and the camera, a light source connected with the mounting seat, and a control component and a power supply component which are respectively arranged on the detecting plate, the light source, the camera and the power supply component are respectively and electrically connected with the control component, and the power supply component can respectively supply power to the light source, the camera and the control component; the detection plate does not block the camera from receiving images and does not block light emitted by the light source; the adjusting component is used for adjusting the relative position between the camera and the mounting seat.

Further, the adjusting assembly comprises an adjusting block, an adjusting screw rod and an adjusting knob, wherein the adjusting block is arranged on the mounting seat in a sliding manner, the middle part of the adjusting screw rod is rotationally connected with the mounting seat, the adjusting knob is arranged at one end of the adjusting screw rod, and the other end of the adjusting knob is inserted into the adjusting block and is in threaded connection with the adjusting block; the camera is arranged on the adjusting block.

Further, the calibration device also comprises a signal transmitter and a display component which are arranged on the control component, and the display component is in communication connection with the control component through the signal transmitter.

Further, the calibration device also comprises a connecting piece, a strip hole arranged on the connecting piece and a mounting hole arranged on the mounting seat, wherein the strip hole can be communicated with the mounting hole, and the strip hole is connected with the mounting hole through a locking piece; the light source is arranged on the connecting piece.

Further, the detection plate is arranged in a hollow mode.

Further, the calibrating device further comprises a base plate arranged on the detecting plate, a support connected to the base plate and a containing space formed by surrounding the base plate and the inner side wall of the support, and the power supply assembly is clamped in the containing space.

Further, the mounting seat is arranged on the side edge of the detection plate.

Further, a penetrating circular detection hole is formed in the detection plate; the light source and the camera are positioned below the detection hole.

Further, the plurality of mounting seats, the plurality of cameras and the plurality of light sources are correspondingly arranged, and the plurality of cameras and the plurality of light sources are respectively and electrically connected with the control assembly; the detection plate is provided with a through calibration groove, and a plurality of light sources and cameras are respectively positioned below the calibration groove.

Further, the detection plate is transparent.

The utility model has the beneficial effects that: the utility model has simple and compact structure and high degree of automation, the control component, the power component, the camera and the light source can be integrally arranged on the detection plate, so that the calibrating device forms a modularized design, and can be calibrated after being arranged on the cross beam of the elliptical printing machine. The calibration device is arranged on the elliptical printing machine, so that the calibration of all screen printing plates of the elliptical printing machine can be completed, the calibration cost is greatly saved, and the machine adjustment efficiency of the elliptical printing machine is improved. Because the distance that the crossbeam drove the pick-up plate at every turn is the same, when every turn pick-up plate moved to the half tone below and photographed, the relative position when pick-up plate and half tone were photographed can not change. In the calibration process, the detection plate does not block the camera to receive the image and does not block the light emitted by the light source, and when the detection plate moves below the reference screen, the position coordinates of the marking points of the reference screen can be obtained through shooting, the problem that the marking points can be shot only by adjusting the relative positions of the reference screen and the detection plate due to the fact that the marking points of the reference screen are blocked by the detection plate does not exist, the screen calibration method is simple in step, convenient and quick to adjust, and the structure of the detection plate is simplified.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present utility model.

Fig. 2 is a schematic partial perspective view of a first embodiment of the present utility model.

Fig. 3 is a schematic perspective view of a second embodiment of the present utility model.

Fig. 4 is a schematic bottom view of a third embodiment of the present utility model.

Reference numerals illustrate:

1. a detection plate; 2. a visual detection mechanism; 3. a detection hole; 4. a mounting base; 5. an adjusting block; 6. a camera; 7. a light source; 8. adjusting a screw; 9. an adjustment assembly; 10. a control assembly; 11. a power supply assembly; 12. a control switch; 13. a signal transmitter; 14. a connecting piece; 15. a slit hole; 16. a mounting hole; 17. reinforcing strips; 18. a limiting plate; 19. a through hole; 20. a backing plate; 21. a bracket; 22. an extension; 23. an adjustment knob; 24. the groove is calibrated.

Detailed Description

The utility model will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the utility model.

Embodiment one.

As shown in fig. 1 to 2, the calibration device for an elliptical printing machine provided by the utility model comprises a detection plate 1 and a visual detection mechanism 2 arranged on the detection plate 1, wherein the visual detection mechanism 2 comprises a camera 6, a mounting seat 4 arranged on the detection plate 1, an adjusting component 9 connected with the mounting seat 4 and the camera 6, a light source 7 connected with the mounting seat 4, and a control component 10 and a power supply component 11 respectively arranged on the detection plate 1, the light source 7, the camera 6 and the power supply component 11 are respectively electrically connected with the control component 10, and the power supply component 11 can respectively supply power to the light source 7, the camera 6 and the control component 10; the detection board 1 does not block the camera 6 from receiving images and does not block the light emitted by the light source 7; the adjusting assembly 9 is used for adjusting the relative position between the camera 6 and the mounting seat 4.

Specifically, the light source 7 and the camera 6 are coaxially arranged; the light source 7 can adopt an annular light source 7, light rays are uniformly diffused, illumination at different angles can be provided, the edge outline of the marking point is clear, the position information of the marking point can be highlighted, and the problem of diagonal illumination shadow can be effectively solved. In the actual use process, the detection plate 1 is arranged on a cross beam which can be connected with the table plate, and the cross beam can be in sliding connection with a track of the elliptical printing machine. After the installation, the screen, the detection plate 1, the light source 7 and the camera 6 are sequentially arranged from top to bottom, the screen is used as a reference screen, the power supply assembly 11 is used for supplying power to the control assembly 10, the light source 7 and the camera 6 respectively, and the adjusting assembly 9 is used for driving the camera 6 to move relative to the mounting seat 4 so that the camera 6 moves in a direction close to or far away from the light source 7 until the camera 6 can be clearly focused. Shooting the mark points on the reference screen by a camera 6, transmitting the shot pictures of the mark points to a control assembly 10, calculating the position coordinates of the mark points of the reference screen by the control assembly 10, and taking the position coordinates of the reference screen as reference coordinates; then the detection plate 1 is driven by the cross beam to slide to the lower part of the next screen printing plate on the elliptical printing machine, then the camera 6 shoots the mark point on the screen printing plate, the shot picture of the mark point is transmitted to the control component 10, the position coordinate of the mark point of the screen printing plate is calculated by the control component 10, the deviation between the position coordinate of the mark point of the screen printing plate and the reference coordinate is calculated, then the position adjusting mechanism of the elliptical printing machine is controlled to adjust the position of the screen printing plate, the position deviation of the screen printing plate is eliminated, the mark point of the screen printing plate is overlapped with the reference coordinate, and the correction of the position of the screen printing plate is realized. The detection plate 1 is driven by the cross beam to move to the next screen printing plate of the elliptical printing machine, and the actions are repeated, so that the calibration of all screen printing plates of the whole elliptical printing machine can be completed through one calibration device. After the positions of all the screen plates of the elliptical printing machine are calibrated, the detection plate 1 is detached from the cross beam, then the table plate is arranged on the cross beam of the detection plate 1, and printing is carried out by directly carrying printed matters through the table plate. The utility model has simple and compact structure and high degree of automation, the control component 10, the power supply component 11, the camera 6 and the light source 7 can be integrally arranged on the detection board 1, so that the calibrating device forms a modularized design, and can be calibrated after being arranged on the cross beam of the elliptical printing machine. The calibration device is arranged on the elliptical printing machine, so that the calibration of all screen printing plates of the elliptical printing machine can be completed, the calibration cost is greatly saved, and the machine adjustment efficiency of the elliptical printing machine is improved. Because the distance that the crossbeam drove pick-up plate 1 at every turn is the same, when every turn pick-up plate 1 moved to the half tone below and photographed, the relative position when pick-up plate 1 and half tone were photographed can not change. In the calibration process, the detection plate 1 does not block the camera 6 from receiving images and does not block the light emitted by the light source 7, when the detection plate 1 moves below the reference screen, the position coordinates of the marking points of the reference screen can be obtained through shooting, the problem that the marking points of the reference screen are blocked by the detection plate 1 and the marking points can be obtained through shooting only by adjusting the relative positions of the reference screen and the detection plate 1 is solved, the screen calibration step is simple, the adjustment is convenient and quick, and the structure of the detection plate 1 is simplified.

Preferably, a mechanical positioning mechanism is further arranged on the elliptical printing machine, and the mechanical positioning mechanism is used for limiting or positioning the position of the detection plate 1. In the actual use process, when the camera 6 is used for taking a picture, the relative position between the detection plate 1 and the reference screen is used as a reference position, after the detection plate 1 is driven to move by the cross beam, the position of the detection plate 1 is limited or positioned by the mechanical positioning mechanism, so that the relative position between the detection plate 1 and the screen to be calibrated is the same as the reference position when taking pictures every time, and the precision in the subsequent screen adjustment process is further improved. The mechanical positioning mechanism may employ an existing limiting device, and will not be described in detail herein.

Further, the adjusting assembly 9 comprises an adjusting block 5 arranged on the mounting seat 4 in a sliding manner, an adjusting screw rod 8 with the middle part rotationally connected with the mounting seat 4 and an adjusting knob 23 arranged at one end of the adjusting screw rod 8, and the other end of the adjusting knob 23 is inserted into the adjusting block 5 and is in threaded connection with the adjusting block 5; the camera is arranged on the adjusting block 5.

Specifically, the sliding direction of the adjusting block 5 relative to the mounting seat 4 is parallel to the length direction of the adjusting screw 8. Because the sliding limitation of regulating block 5 and mount pad 4, rotatory adjust knob 23, adjust knob 23 drive adjusting screw 8 for mount pad 4 rotates, and adjusting screw 8 passes through regulating block 5 and drives camera 6 for mount pad 4 slides, and the position adjustment that drives camera 6 through adjusting screw 8 and regulating block 5 cooperation is convenient for camera 6 can more clear shoot out the image of mark point on the half tone, improves and shoots the definition.

Specifically, the calibration device further comprises a control switch 12 arranged on the detection plate 1, wherein the control switch 12 is used for switching on or off the light source 7; the light source 7 is electrically connected to the control assembly 10 via a control switch 12. In the actual use process, when the camera 6 needs to shoot the position of the mark point of the screen, the control assembly 10 controls the control switch 12 to turn on the light source 7, so that shooting is facilitated.

Further, the calibration device further comprises a signal transmitter 13 and a display assembly (not shown) which are arranged on the housing of the control assembly 10, and the display assembly is in communication connection with the control assembly 10 through the signal transmitter 13.

Specifically, the control assembly 10 may be an existing industrial personal computer, the signal transmitter 13 may be an existing bluetooth module or router, and the camera 6 may be an existing photographing and collecting device, which will not be described herein. The display assembly may employ an existing display. In the actual use process, the camera 6 transmits the shot image to the control component 10, the control component 10 processes the image shot by the camera 6 and transmits the processed image to the signal transmitter 13, then the signal transmitter 13 transmits the processed image to the display component for display, so that the user can observe conveniently, and the user can directly manually adjust the position of the screen from the position of the screen marking point displayed in the display, thereby improving the practicability of the utility model.

Further, the calibration device further comprises a connecting piece 14, a strip hole 15 arranged on the connecting piece 14 and a mounting hole 16 arranged on the mounting seat 4, wherein the strip hole 15 can be communicated with the mounting hole 16, and the strip hole 15 is connected with the mounting hole 16 through a locking piece; the light source 7 is arranged on the connector 14.

Specifically, the locking piece can be a screw or a screw; the strip hole 15 is provided with a plurality of first threads, the connecting piece 14 is provided with a second thread, and the first threads and the second threads can be respectively in threaded connection with the locking piece. In the actual use process, the light source 7 is arranged on the connecting piece 14, the locking piece is sequentially connected with the first thread and the second thread with proper heights of the strip holes 15, so that the positions of the light source 7 and the connecting piece 14 arranged on the mounting seat 4 are adjusted, the position adjusting structure of the light source 7 is simple, and the position adjusting is convenient. In addition, the light source 7 is connected with the mounting seat 4 through the connecting piece 14, so that the gap between the light source 7 and the mounting seat 4 is increased, and the heat dissipation of the light source 7 is facilitated.

Further, the detection plate 1 is arranged in a hollow mode, the weight of the detection plate 1 is reduced, and the production cost of the detection plate 1 is saved.

Further, the calibration device also comprises a plurality of reinforcing strips 17 arranged on the detection plate 1. A plurality of the reinforcing bars 17 are respectively connected to the cross members.

Specifically, the calibration device further includes two limiting plates 18 disposed on two sides of the reinforcing strip 17 and a through hole 19 disposed through the reinforcing strip 17. In the in-service use, the mounting position of the cross beam is limited through the limiting plates 18 on two sides, so that the cross beam can be clamped between the two limiting plates 18, the cross beam and the reinforcing strip 17 can be positioned conveniently, the cross beam, the through holes 19 and the detection plate 1 are penetrated through fasteners (bolts or screws) in sequence, the cross beam, the reinforcing strip 17 and the detection plate 1 are fixed quickly, and the cross beam is convenient to connect. The reinforcing strips 17 are additionally arranged, so that the connection between the detection plate 1 and the cross beam is facilitated, the strength and rigidity of the detection plate 1 can be increased, and the service life of the detection plate 1 is prolonged.

Further, the calibration device further comprises a pad 20 disposed on the detection board 1, a bracket 21 connected to the pad 20, and a containing space surrounded by the pad 20 and an inner sidewall of the bracket 21, wherein the power supply assembly 11 is clamped in the containing space.

Specifically, the bracket 21 is provided at both ends with extension portions 22 respectively connected to the pad 20, and the bracket 21 is intended to have an n-shape in side view. In the actual use process, the base plate 20 is arranged on the detection plate 1, the power supply assembly 11 is placed on the base plate 20, then the bracket 21 is clamped on the power supply assembly 11, and the extension part 22 and the base plate 20 can be connected through a fastener (a bolt or a screw), so that the fixation of the power supply assembly 11 and the detection plate 1 is completed. The power supply assembly 11 and the detection plate 1 are simple in fixed structure and convenient to install.

Further, the plurality of the mounting seats 4, the cameras 6 and the light sources 7 are correspondingly arranged, and the plurality of the cameras 6 and the light sources 7 are respectively electrically connected with the control assembly 10.

In the actual use process, a plurality of cameras 6 shoot a plurality of mark points on the half tone simultaneously, carry the position information of a plurality of mark points of half tone to control assembly 10 respectively, control assembly 10 can calculate the position ratio deviation of mark point on the half tone more accurately, and then adjusts the position of half tone accurately.

Further, the mounting seat 4 is arranged at the side edge of the detection plate 1.

In the in-service use, the area of the detection plate 1 is set to be slightly smaller than the area of the screen, the mounting seat 4 is arranged on the side edge of the detection plate 1, the camera 6 is arranged on the mounting seat 4 through the adjusting component 9, and when the camera 6 shoots conveniently, the detection plate 1 can be prevented from blocking the camera 6 to receive the image of the marking point of the screen and shielding the light emitted by the light source 7 from irradiating the marking point of the screen. The mounting seat 4 can be connected with the detection plate 1 in a threaded connection or clamping connection mode.

Embodiment two.

As shown in fig. 3, this embodiment is different from the first embodiment in that: the detection plate 1 is provided with a through circular detection hole 3; the light source 7 and the camera 6 are located below the detection aperture 3.

Specifically, the number of the detection holes 3 is set to be plural, and plural ones of the detection holes 3 are provided in one-to-one correspondence with plural cameras 6. The detection hole 3, the light source 7 and the camera 6 are coaxially arranged, and the detection hole 3, the light source 7 and the camera 6 are sequentially arranged from top to bottom. In the actual use process, the mounting seat 4 is arranged on the bottom surface of the detection plate 1, the detection hole 3 is additionally arranged, so that the plurality of light sources 7 and the camera 6 are simultaneously exposed below the screen, the camera 6 can shoot the mark point on the screen through the detection hole 3, the light emitted by the light sources 7 can irradiate the mark point on the screen through the detection hole 3, and the detection plate 1 can not block the camera 6 from receiving images and block the light emitted by the light sources 7. The size of the detection hole 3 can be determined according to the sizes of the light source 7 and the camera 6, the detection hole 3 can be set to be large, coarse adjustment on the position of the reference screen is not needed, the mark point of the screen can be directly exposed to the camera 6 through the detection hole 3, and the adjustment step of the utility model is simplified. The detection hole 3 is only hollow out for arranging the detection plate 1, so that the detection plate 1 is prevented from shielding the main camera 6 and the light source 7, and the size of the detection plate 1 can be the same as that of the table.

The other structures of the present embodiment are the same as those of the first embodiment, and the same structure may be resolved by the first embodiment, which is not described in detail herein.

Embodiment three.

As shown in fig. 4, this embodiment is different from the first embodiment in that: the detection plate 1 is provided with a through calibration groove 24, and a plurality of light sources 7 and cameras 6 are respectively positioned below the calibration groove 24.

In the actual use process, the mounting seat 4 is disposed on the bottom surface of the detection board 1, and the calibration groove 24 is used to enable the plurality of light sources 7 and the camera 6 to be simultaneously exposed below the screen, the camera 6 can shoot the mark point on the screen through the calibration groove 24, the light emitted by the light sources 7 can irradiate the mark point on the screen through the detection holes 3, and the detection board 1 can not block the camera 6 from receiving images and block the light emitted by the light sources 7. The calibration groove 24 is convenient to process and simple in processing steps.

The other structures of the present embodiment are the same as those of the first embodiment, and the same structure may be resolved by the first embodiment, which is not described in detail herein.

Example four.

The present embodiment is different from the first embodiment in that: the detection plate 1 is transparent.

Specifically, the mounting seat 4 is disposed on the bottom surface of the detection plate 1, and the detection plate 1 may be made of transparent plastic. The detection plate 1 is transparent, shielding of the camera 6 and the light source 7 can be avoided, and the camera 6 can conveniently collect pictures of marking points of the screen. The detection plate 1 has simple structure and convenient production.

The other structures of the present embodiment are the same as those of the first embodiment, and the same structure may be resolved by the first embodiment, which is not described in detail herein.

All technical features in the embodiment can be freely combined according to actual needs.

The foregoing embodiments are preferred embodiments of the present utility model, and in addition, the present utility model may be implemented in other ways, and any obvious substitution is within the scope of the present utility model without departing from the concept of the present utility model.

Claims (10)

1. A calibration device for an elliptical printing machine, characterized by: the device comprises a detection plate (1) and a visual detection mechanism (2) arranged on the detection plate (1), wherein the visual detection mechanism (2) comprises a camera (6), a mounting seat (4) arranged on the detection plate (1), an adjusting component (9) connected with the mounting seat (4) and the camera (6), a light source (7) connected with the mounting seat (4), and a control component (10) and a power supply component (11) which are respectively arranged on the detection plate (1), the light source (7), the camera (6) and the power supply component (11) are respectively electrically connected with the control component (10), and the power supply component (11) can respectively supply power for the light source (7), the camera (6) and the control component (10); the detection plate (1) does not block the camera (6) from receiving images and does not block light emitted by the light source (7); the adjusting component (9) is used for adjusting the relative position between the camera (6) and the mounting seat (4).

2. A calibration device for an elliptical printing machine according to claim 1, wherein: the adjusting assembly (9) comprises an adjusting block (5) arranged on the mounting seat (4) in a sliding manner, an adjusting screw (8) with the middle part rotationally connected with the mounting seat (4) and an adjusting knob (23) arranged at one end of the adjusting screw (8), wherein the other end of the adjusting knob (23) is inserted into the adjusting block (5) and is in threaded connection with the adjusting block (5); the camera (6) is arranged on the adjusting block (5).

3. A calibration device for an elliptical printing machine according to claim 1, wherein: the calibration device also comprises a signal transmitter (13) and a display assembly, wherein the signal transmitter (13) and the display assembly are arranged on the control assembly (10), and the display assembly is in communication connection with the control assembly (10) through the signal transmitter (13).

4. A calibration device for an elliptical printing machine according to claim 1, wherein: the calibration device further comprises a connecting piece (14), a strip hole (15) arranged on the connecting piece (14) and a mounting hole (16) arranged on the mounting seat (4), wherein the strip hole (15) can be communicated with the mounting hole (16), and the strip hole (15) is connected with the mounting hole (16) through a locking piece; the light source (7) is arranged on the connecting piece (14).

5. A calibration device for an elliptical printing machine according to claim 1, wherein: the detection plate (1) is arranged in a hollow mode.

6. A calibration device for an elliptical printing machine according to claim 1, wherein: the calibration device further comprises a base plate (20) arranged on the detection plate (1), a support (21) connected to the base plate (20) and a containing space formed by surrounding the base plate (20) and the inner side wall of the support (21), and the power supply assembly (11) is clamped in the containing space.

7. A calibration device for an elliptical printing machine according to any one of claims 1 to 6, wherein: the mounting seat (4) is arranged on the side edge of the detection plate (1).

8. A calibration device for an elliptical printing machine according to any one of claims 1 to 6, wherein: the detection plate (1) is provided with a through circular detection hole (3); the light source (7) and the camera (6) are positioned below the detection hole (3).

9. A calibration device for an elliptical printing machine according to any one of claims 1 to 6, wherein: the plurality of mounting seats (4), the plurality of cameras (6) and the plurality of light sources (7) are correspondingly arranged, and the plurality of cameras (6) and the plurality of light sources (7) are respectively and electrically connected with the control assembly (10); the detection plate (1) is provided with a through calibration groove (24), and the light sources (7) and the cameras (6) are respectively positioned below the calibration groove (24).

10. A calibration device for an elliptical printing machine according to any one of claims 1 to 6, wherein: the detection plate (1) is transparent.