Calibration Method and Calibration Device of Engraving System, Engraving System

Abstract

The present invention provides a calibration method, a calibration device and a carving system for a carving system. The calibration method for the carving system includes: performing angle error calibration on a first motion axis, a second motion axis and a third motion axis; performing geometric distortion calibration on a first galvanometer and a second galvanometer; performing offset calibration on the first galvanometer and the second galvanometer; performing scaling calibration on the first galvanometer and the second galvanometer; performing angle calibration on the first galvanometer and the second galvanometer; performing splicing test and micro compensation on the first galvanometer and the second galvanometer. By calibrating the laser carving system with dual galvanometers, the present application not only improves the working efficiency of the carving system using dual galvanometers for plate carving, but also eliminates the splicing error caused by the position offset, different proportions and angle offset of the patterns carved by the two galvanometers, and improves the display effect of the carved graphics and texts.

Description

Technical Field

[0001] The present invention relates to the field of laser engraving plate making, and in particular, to a calibration method and device for an engraving system, and an engraving system. Background Art

[0002] Currently, most of the existing plate making equipment for directly laser engraving intaglio plates uses a single-path laser step-by-step engraving method. When processing large-sized plates, it takes a long time and the working efficiency is low. Using two galvanometers for simultaneous engraving of the plate can improve the working efficiency. However, sometimes the graphics and texts on the whole plate are continuous. In this case, whether it is a single galvanometer or two galvanometers, it involves the problem of graphics and text splicing, and the splicing of two galvanometers is more complex than that of a single galvanometer.

[0003] Therefore, how to propose a solution that can complete the splicing of graphics and texts with high precision while improving the efficiency has become an urgent problem to be solved at present. Summary of the Invention

[0004] To solve the above technical problems, a first aspect of the present invention proposes a calibration method for an engraving system.

[0005] A second aspect of the present invention further proposes a calibration device for an engraving system.

[0006] A third aspect of the present invention further proposes an engraving system.

[0007] A fourth aspect of the present invention further proposes a computer-readable storage medium.

[0008] In view of this, a first aspect of the present invention proposes a calibration method for an engraving system. The engraving system includes a motion axis, a workpiece table, galvanometers, and an image recognition component. The motion axis includes a first motion axis and a second motion axis arranged horizontally, and a third motion axis arranged parallel to the first motion axis. The first motion axis and the second motion axis are perpendicular to each other, and the third motion axis is higher than the first motion axis and the second motion axis. The workpiece table is used to place and fix the plate to be engraved, and the workpiece table can move along the first motion axis and the second motion axis. The galvanometers include a first galvanometer and a second galvanometer, which can move independently along the third motion axis. The calibration method includes: performing angle error calibration on the first motion axis, the second motion axis, and the third motion axis; performing geometric distortion calibration on the first galvanometer and the second galvanometer; performing offset calibration on the first galvanometer and the second galvanometer; performing scaling calibration on the first galvanometer and the second galvanometer; performing angle calibration on the first galvanometer and the second galvanometer; performing splicing test and micro-compensation on the first galvanometer and the second galvanometer.

[0009] The calibration method of the engraving system provided by the present invention is used for an engraving system and calibrates the engraving system before it officially performs engraving work. The engraving system includes a motion axis, a workpiece table, a galvanometer, and an image recognition component. Among them, the number of motion axes is multiple. The first motion axis and the second motion axis among the multiple motion axes are horizontally arranged and perpendicular to each other. The third motion axis is parallel to the first motion axis, and the third motion axis is higher than the first motion axis and the second motion axis. The workpiece table placed horizontally is used to place the plate to be engraved and can fix it. The image recognition component can be used to assist calibration through visual recognition. Before the engraving system officially performs engraving work, the present application first calibrates the motion axes of the workpiece table and the galvanometer, that is, the angular errors between the first motion axis, the second motion axis, and the third motion axis, then calibrates the geometric distortion of a single galvanometer, then calibrates the offset, scaling, and angular errors between the two galvanometers, and finally verifies and fine-tunes the effect of the engraved and spliced graphics by the two galvanometers through a splicing test. By gradually calibrating the laser engraving system with two galvanometers, the present application not only improves the working efficiency of the engraving system using two galvanometers for plate engraving, but also eliminates the splicing errors caused by the position offset, different scales, and angular offset of the patterns engraved by the two galvanometers, improves the display effect of the engraved graphics, and avoids the poor final engraving effect caused by the errors of the position offset, different scales, and angular offset of the two galvanometers.

[0010] Among them, the image recognition component can be one or multiple. It can be fixed on the galvanometer and move with the galvanometer, or can move independently along the third motion axis, or can be fixed. When the image recognition component is fixed, the workpiece table can be moved to perform image recognition. When the image recognition component is movable, the workpiece table can be fixed and the image recognition component can be moved to perform image recognition.

[0011] In addition, the meanings of "horizontally arranged" and "parallel arranged" used in the present application to describe the relationship between the motion axes are relative to the horizontal and are not limited to absolute horizontal. There can be a slight deviation from the absolute horizontal. The use of "horizontally arranged" and "parallel arranged" in the present application is only for the convenience of expressing the positional relationship between the motion axes.

[0012] In addition, the calibration method of the engraving system in the above technical solution provided by the present invention can also have the following additional technical features:

[0013] In the above technical solution, the steps for calibrating the angular errors of the first motion axis, the second motion axis, and the third motion axis specifically include: controlling the workpiece table to move along the first motion axis and the second motion axis, with the galvanometers fixed, and controlling the first galvanometer or the second galvanometer to engrave a first set of cross marks on the engraving plate according to the preset coordinates; controlling the workpiece table to be stationary, controlling the first galvanometer or the second galvanometer to move along the third motion axis, and engraving a second set of cross marks on the engraving plate according to the preset coordinates; controlling the image recognition component to recognize the actual coordinates of the first set of cross marks and the second set of cross marks on the engraving plate; calculating the angular error calibration compensation values between the first motion axis, the second motion axis, and the third motion axis according to the preset coordinates and the actual coordinates of the first set of cross marks and the second set of cross marks; and performing angular error calibration on the first motion axis, the second motion axis, and the third motion axis based on the angular error calibration compensation values.

[0014] In this technical solution, to calibrate the angular deviation of each motion axis by means of visual recognition, first, the two galvanometers are fixed, the workpiece table is controlled to move along the first motion axis and the second motion axis, and during the movement of the workpiece table, the two galvanometers are respectively controlled to engrave cross marks according to the preset coordinates. After engraving, the image recognition component is controlled to recognize the actual coordinate values of the cross marks engraved by the two galvanometers, so that the angular errors of the first motion axis and the second motion axis can be obtained according to the preset coordinates and the actual coordinates, and the angular errors of the first motion axis and the second motion axis are calibrated accordingly; then, while controlling the workpiece table to be stationary, the two galvanometers are controlled to move along the third motion axis, and during the movement, cross marks are engraved according to the preset coordinates. After engraving, the image recognition component is controlled to recognize the actual coordinate values of the cross marks engraved by the two galvanometers, so that the angular error of the third motion axis can be obtained according to the preset coordinates and the actual coordinates, and the third motion axis is calibrated accordingly. The actual distance between the cross marks engraved by the two galvanometers is made consistent with the preset distance, thereby eliminating the influence of the angular errors between the first motion axis, the second motion axis, and the third motion axis on the engraving effect and improving the display effect of the engraved graphics and texts.

[0015] In the above technical solution, the steps for calibrating the geometric distortion of the first galvanometer and the second galvanometer specifically include: controlling the first galvanometer and the second galvanometer to engrave a cross mark matrix at the preset coordinates on the engraving plate; controlling the image recognition component to recognize the actual coordinates of each cross mark; calculating the geometric distortion calibration compensation values of the first galvanometer and the second galvanometer according to the preset coordinates and the actual coordinates; and performing geometric distortion calibration on the first galvanometer and the second galvanometer based on the geometric distortion calibration compensation values.

[0016] In this technical solution, first, two galvanometers are controlled to engrave a cross mark matrix at the processing area of the engraving plate according to preset coordinates. Then, an image recognition component is used to respectively recognize the actual coordinates of the cross marks engraved by the two galvanometers. Further, by comparing the actual coordinates of each cross mark with the preset coordinates, geometric distortion calibration compensation values of the two galvanometers can be obtained. The geometric distortion of the galvanometers is calibrated according to the geometric distortion calibration compensation values, thereby eliminating the influence of the geometric distortion of a single galvanometer on the engraving result, making the actual engraving position of the galvanometer the same as the preset engraving position, avoiding the occurrence of discontinuous engraving graphics at the splicing position due to the geometric distortion of a single galvanometer, reducing the error at the splicing position of the graphics, and improving the engraving effect.

[0017] In the above technical solution, the steps of offset calibration for the first galvanometer and the second galvanometer specifically include: controlling the workpiece table to be stationary, controlling the first galvanometer and the second galvanometer to respectively engrave a cross mark matrix at the preset coordinates on the engraving plate; obtaining the preset optical center origin coordinates of the first galvanometer and the second galvanometer according to the preset coordinates; controlling the image recognition component to recognize the actual coordinates of the cross marks; obtaining the actual optical center origin coordinates of the first galvanometer and the second galvanometer according to the actual coordinates; calculating the offset calibration compensation values of the first galvanometer and the second galvanometer according to the preset optical center origin coordinates and the actual optical center origin coordinates of the first galvanometer and the second galvanometer; and performing offset calibration on the first galvanometer and the second galvanometer based on the offset calibration compensation values.

[0018] In this technical solution, when the workpiece table is stationary, the two galvanometers are controlled to engrave cross marks according to preset coordinates respectively. Then, the actual coordinate values of the cross marks engraved by the two galvanometers are respectively identified by the image recognition component. The actual optical center origin coordinates of the two galvanometers are obtained according to the actual coordinate values, and the preset optical center origin coordinates are obtained according to the preset coordinates. Furthermore, the offset calibration compensation values of the two galvanometers can be obtained through the preset optical center origin coordinates and the actual optical center origin coordinates, so as to calibrate the optical center offset of the two galvanometers. For example, the actual optical center origins (the intersection of the horizontal and vertical axes of the cross mark) O1 and O2 of the two galvanometers are identified by the image recognition component. Then, the offset of the optical center origin of the two coordinate systems is known through the coordinates between the two actual optical center origins and the preset optical center origin. Furthermore, the distance offsets dx and dy of the optical center origins of the two galvanometers are obtained, and the offset calibration compensation value is calculated accordingly to adjust the optical center positions of the two galvanometers to meet the requirements, thereby eliminating the position deviation of the two galvanometers, making the patterns engraved by the two galvanometers more accurate when engraving subsequent graphics and texts, and avoiding the inability to connect the patterns engraved by the two galvanometers due to the deviation of the optical center position. For example, the coordinate values of the optical center origins of the two galvanometers should both be (0, 0) to ensure more accurate engraving of the spliced graphics and texts. However, in fact, the actual coordinates of the optical center origins of the two galvanometers are (0, 0) and (1, 1). At this time, the distance offsets dx and dy between the optical center origins of the two galvanometers are both 1. The offset calibration is performed by compensating the optical center origin so that both optical center origins are (0, 0).

[0019] In the above technical solution, the steps for scaling calibration of the first galvanometer and the second galvanometer specifically include: controlling the workpiece table to be stationary, and the first galvanometer and the second galvanometer respectively engraving a cross mark matrix on the engraving plate according to preset coordinates; controlling the image recognition component to identify the actual coordinates of the cross marks; respectively obtaining the actual length and width of the cross mark matrix engraved by the first galvanometer and the second galvanometer according to the actual coordinates; obtaining the preset length and width of the cross mark matrix according to the preset coordinates; calculating the scaling calibration compensation values of the first galvanometer and the second galvanometer according to the preset length and width of the cross mark matrix and the actual length and width of the cross mark matrix; and performing scaling calibration on the first galvanometer and the second galvanometer based on the scaling calibration compensation values.

[0020] In this technical solution, first, keep the workbench stationary. Control two galvanometers to engrave cross marks on the engraving plate according to preset coordinates. Through the image recognition component, it is recognized that the actual lengths and widths of the cross mark matrices engraved by the two galvanometers are L1, L2 and L3, L4 respectively. By comparing the preset lengths and widths of the cross mark matrix obtained from the preset coordinates with the actual lengths and widths, the scaling error of the galvanometer can be determined. For example, the length and width of the cross mark matrix engraved according to the preset coordinates are both 5 mm. As a result, the actual lengths and widths of the cross mark matrix engraved by one of the galvanometers, that is, L1 and L2, are both 4.9 mm, and the actual lengths and widths of the cross mark matrix engraved by the other galvanometer, that is, L3 and L4, are both 5.1 mm. At this time, it is necessary to calibrate the galvanometer according to the ratio to make the cross marks engraved by the two galvanometers have the same ratio, thereby eliminating the large error at the splicing point of the subsequent engraved graphics and text caused by the different scaling ratios between the two galvanometers, and further resulting in an unsatisfactory engraving effect.

[0021] In the above technical solution, the steps for angle calibration of the first galvanometer and the second galvanometer specifically include: controlling the workpiece table to be stationary, controlling the first galvanometer and the second galvanometer to engrave cross mark matrices at preset coordinates on the engraving plate respectively; controlling the image recognition component to recognize the actual coordinates of the cross marks; respectively obtaining the actual optical center origin coordinates of the first galvanometer and the second galvanometer, and the horizontal and vertical coordinate axes directions of the first galvanometer and the second galvanometer according to the actual coordinates, and establishing a coordinate system with the optical center origin as the coordinate origin; calculating the angle offsets of the coordinate axes of the first galvanometer and the second galvanometer based on the coordinate system; calculating the angle calibration compensation values of the first galvanometer and the second galvanometer according to the angle offsets; and performing angle calibration on the first galvanometer and the second galvanometer based on the angle calibration compensation values.

[0022] In this technical solution, when the workpiece stage remains stationary, two galvanometers are controlled to perform cross-mark engraving according to preset coordinates respectively. Then, the actual coordinate values of the cross-marks engraved by the two galvanometers are respectively identified by the image recognition component. Based on the actual coordinate values, the actual optical center origin coordinates of the two galvanometers are obtained respectively. And the horizontal and vertical axes of each galvanometer are fitted according to the actual coordinates of each cross-mark. Then, with the actual optical center origin as the coordinate origin, the coordinate systems of the two galvanometers are established respectively. Furthermore, based on the coordinate systems of the two galvanometers, the angular offsets θ1 and θ2 of the two galvanometers are calculated respectively. If the coordinate system obtained from the cross-mark matrix engraved according to the preset coordinates is used as the standard coordinate system, by comparing the coordinate systems of the two galvanometers obtained from the actual coordinates with the standard coordinate system, the included angles between the axes of the two galvanometers and the axes of the standard coordinate system can be obtained. With the angular calibration compensation values of the two galvanometers obtained in this way, the angular offsets of the two galvanometers are calibrated, thereby eliminating the angular deviations of the two galvanometers, making the patterns engraved by the two galvanometers more accurate when engraving subsequent graphics and texts, and avoiding the inability to connect the patterns engraved by the two galvanometers respectively due to the deviation of the optical center position.

[0023] In the above technical solution, the steps of performing splicing test and micro-compensation on the first galvanometer and the second galvanometer specifically include: controlling the first galvanometer and the second galvanometer to engrave splicing graphics and texts, and identifying the deviation of the repeated area when the first galvanometer and the second galvanometer engrave the splicing graphics and texts through the image recognition component; when the deviation exceeds the preset deviation threshold, performing micro-compensation on the first galvanometer and the second galvanometer.

[0024] In this technical solution, after calibration through the above technical solution, a splicing test is performed on the double galvanometers to make them engrave splicing graphics and texts, and the image recognition component is used to analyze the effect of the splicing engraving, that is, to identify the deviation of the repeated area of the splicing graphics and texts engraved by the double galvanometers, and when the deviation exceeds the preset deviation threshold, performing micro-compensation on the double galvanometers.

[0025] In any of the above technical solutions, the length of the repeated area is 5μm - 50μm.

[0026] In this technical solution, at the graphic and text splicing part, the length of the area jointly processed by the two galvanometers is 5μm - 50μm. After the above calibration and compensation, the splicing effect of the engraved graphics and texts is improved. By limiting the length of the area jointly processed by the two galvanometers, it is not possible to end the engraving before the processed graphics and texts of the two galvanometers are not spliced yet, and at the same time, it is also possible to avoid excessive repeated processing of areas and increase useless workload.

[0027] Furthermore, the preset deviation threshold at the graphic and text splicing part is between 0μm - 3μm.

[0028] The second aspect of the present invention provides a calibration device for a carving system, including: a memory, a processor, and a program stored on the memory and executable on the processor. When the program is executed by the processor, the steps defined in the calibration method provided in any of the above technical solutions are implemented.

[0029] The calibration device for a carving system provided by the technical solution of the present invention includes a memory, a processor, and a program stored on the memory and executable on the processor. When the program is executed by the processor, the steps defined in any of the above calibration methods are implemented. At the same time, since the calibration device of the carving system of the present application can implement the steps defined in any of the above calibration methods, the calibration device of the carving system provided by the present invention has all the beneficial effects of the calibration method of the carving system provided in any of the above technical solutions.

[0030] The third aspect of the present invention provides a carving system, including: a motion axis, the motion axis includes a first motion axis and a second motion axis arranged horizontally, and a third motion axis arranged parallel to the first motion axis, the first motion axis and the second motion axis are perpendicular to each other, and the third motion axis is higher than the first motion axis and the second motion axis; a workpiece table for placing and fixing the plate to be carved, and the workpiece table can move along the first motion axis and the second motion axis; a galvanometer, the galvanometer includes a first galvanometer and a second galvanometer, and can move independently along the third motion axis; an image recognition component; and a calibration device for the carving system as in the above technical solution.

[0031] In this technical solution, the carving system includes a motion axis, a workpiece table, a galvanometer, an image recognition component, and a calibration device for the carving system as in the above technical solution. Among them, the number of motion axes is multiple, the first motion axis and the second motion axis among the multiple motion axes are arranged horizontally and perpendicular to each other, the third motion axis is parallel to the first motion axis, and the third motion axis is higher than the first motion axis and the second motion axis; the plate to be carved is placed on the workpiece table and fixed, and the workpiece table can move along the first motion axis and the second motion axis; the number of galvanometers is two and can move independently along the third motion axis; the image recognition component can be used to assist calibration through visual recognition; the calibration device of the carving system can implement the steps defined in any of the above calibration methods. At the same time, since the carving system of the present application includes a calibration device that can implement the steps defined in any of the above calibration methods, the carving system provided by the present invention has all the beneficial effects of the calibration method of the carving system provided in any of the above technical solutions.

[0032] The fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed, the steps of the calibration method in any of the above technical solutions are implemented.

[0033] In this technical solution, when the computer program stored on the computer-readable storage medium is executed by the processor, the steps of the calibration method in any one of the above technical solutions can be implemented, and thus all the beneficial technical effects of the above calibration method are achieved, which will not be elaborated herein.

[0034] Additional aspects and advantages of the present invention will become apparent in the following description section, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0036] Figure 1 FIG. 1 shows a schematic flow chart of a calibration method for an engraving system according to an embodiment of the present invention;

[0037] Figure 2 FIG. 2 shows Figure 2 a schematic diagram of the coordinate axes fitted in S112 in FIG. 1;

[0038] Figure 3 FIG. 3 shows a schematic diagram of a double galvanometer engraving repetition area in the engraving system of the present invention;

[0039] Figure 4 FIG. 4 shows a block diagram of a calibration device for an engraving system according to an embodiment of the present invention;

[0040] Figure 5 FIG. 5 shows a schematic diagram of the overall hardware layout of the engraving system of the present invention;

[0041] Figure 6 FIG. 6 shows a schematic flow chart of a calibration method for an engraving system according to another embodiment of the present invention.

[0042] Wherein, Figures 3 to 5 the corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0043] 302 first galvanometer engraving line, 304 second galvanometer engraving line, 306 repetition area, 400 calibration device of the engraving system, 402 memory, 404 processor, 502 first galvanometer, 504 second galvanometer, 506 workpiece table, 508 image recognition component, 510 first motion axis, 512 second motion axis, 514 third motion axis. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may be practiced in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0046] The following refers to Figures 1 to 6 Describe the calibration method, calibration device, and engraving system of the engraving system in some embodiments of the present invention.

[0047] An embodiment of the first aspect of the present invention provides a calibration method for an engraving system. The engraving system includes a motion axis, a workpiece table, a galvanometer, and an image recognition component. The motion axis includes a first motion axis and a second motion axis arranged horizontally, and a third motion axis arranged parallel to the first motion axis. The first motion axis and the second motion axis are perpendicular to each other, and the third motion axis is higher than the first motion axis and the second motion axis. The workpiece table is used to place and fix the plate to be engraved, and the workpiece table can move along the first motion axis and the second motion axis. The galvanometer includes a first galvanometer and a second galvanometer, which can move independently along the third motion axis. As Figure 1 shown, the calibration method includes:

[0048] S102, perform angle error calibration on the first motion axis, the second motion axis, and the third motion axis;

[0049] S104, perform geometric distortion calibration on the first galvanometer and the second galvanometer;

[0050] S106, perform offset calibration on the first galvanometer and the second galvanometer;

[0051] S108, perform scaling calibration on the first galvanometer and the second galvanometer;

[0052] S110, perform angle calibration on the first galvanometer and the second galvanometer;

[0053] S112, perform splicing test and micro-compensation on the first galvanometer and the second galvanometer.

[0054] The calibration method of the engraving system provided by this embodiment is used for the engraving system and calibrates it before the engraving system officially performs engraving work. The engraving system includes a motion axis, a workpiece table, a galvanometer, and an image recognition component. Among them, the number of motion axes is multiple. The first motion axis and the second motion axis among the multiple motion axes are horizontally arranged and perpendicular to each other. The third motion axis is parallel to the first motion axis and is higher than the first motion axis and the second motion axis. The workpiece table placed horizontally is used to place the plate to be engraved and can fix it. The image recognition component can be used to assist calibration through visual recognition. Before the engraving system officially performs engraving work, this application first calibrates the motion axes of the workpiece table and the galvanometer motion axes, that is, the angular errors between the first motion axis, the second motion axis, and the third motion axis. Then, it calibrates the geometric distortion of a single galvanometer. Then, it calibrates the offset, scaling, and angular errors between the two galvanometers. Finally, it verifies and fine-tunes the effect of the engraved and spliced graphics by the two galvanometers through a splicing test. By gradually calibrating the laser engraving system with two galvanometers, this application not only improves the working efficiency of the engraving system using two galvanometers for plate engraving, but also eliminates the splicing errors caused by the position offset, different scales, and angular offset of the patterns engraved by the two galvanometers, improves the display effect of the engraved graphics, and avoids the poor final engraving effect due to the errors of the position offset, different scales, and angular offset of the two galvanometers.

[0055] Among them, the image recognition component can be one or multiple. It can be fixed on the galvanometer and move with the galvanometer, or it can move independently along the third motion axis relative to the galvanometer, or it can be fixed. When the image recognition component is fixed, the workpiece table can be moved to perform image recognition. When the image recognition component is movable, the workpiece table can be fixed and the image recognition component can be moved to perform image recognition. Of course, the setting method of the image recognition component can also be adjusted arbitrarily according to actual needs.

[0056] In addition, the meanings of "horizontally arranged" and "parallel arranged" used in this application to describe the relationship between the motion axes are relative to the horizontal and are not limited to the absolute horizontal. There can be a slight deviation from the absolute horizontal. The use of "horizontally arranged" and "parallel arranged" in this application is only for the convenience of expressing the positional relationship between the motion axes.

[0057] In the above embodiments, the steps of calibrating the angular errors of the first motion axis, the second motion axis, and the third motion axis specifically include: controlling the workbench to move along the first motion axis and the second motion axis, keeping the galvanometers stationary, and controlling the first galvanometer or the second galvanometer to engrave a first set of cross marks on the engraving plate according to the preset coordinates; controlling the workbench to be stationary, controlling the first galvanometer or the second galvanometer to move along the third motion axis, and engraving a second set of cross marks on the engraving plate according to the preset coordinates; controlling the image recognition component to recognize the actual coordinates of the first set of cross marks and the second set of cross marks on the engraving plate; calculating the angular error calibration compensation values between the first motion axis, the second motion axis, and the third motion axis according to the preset coordinates and the actual coordinates of the first set of cross marks and the second set of cross marks; and performing angular error calibration on the first motion axis, the second motion axis, and the third motion axis based on the angular error calibration compensation values.

[0058] In this embodiment, to calibrate the angular deviation of each motion axis by means of visual recognition, first, the two galvanometers are fixed, the workbench is controlled to move along the first motion axis and the second motion axis, and during the movement of the workbench, the two galvanometers are respectively controlled to engrave cross marks according to the preset coordinates. After engraving, the image recognition component is controlled to recognize the actual coordinate values of the cross marks engraved by the two galvanometers, and then the angular errors of the first motion axis and the second motion axis can be obtained according to the preset coordinates and the actual coordinates, so as to calibrate the angular errors of the first motion axis and the second motion axis; then, while controlling the workbench to be stationary, the two galvanometers are controlled to move along the third motion axis, and during the movement, cross marks are engraved according to the preset coordinates. After engraving, the image recognition component is controlled to recognize the actual coordinate values of the cross marks engraved by the two galvanometers, and then the angular error of the third motion axis can be obtained according to the preset coordinates and the actual coordinates, so as to calibrate the third motion axis. The actual distance between the cross marks engraved by the two galvanometers is made consistent with the preset distance, thereby eliminating the influence of the angular errors between the first motion axis, the second motion axis, and the third motion axis on the engraving effect and improving the display effect of the engraved graphics and texts.

[0059] In the above embodiments, the steps of calibrating the geometric distortion of the first galvanometer and the second galvanometer specifically include: controlling the first galvanometer and the second galvanometer to engrave a cross mark matrix at the preset coordinates on the engraving plate; controlling the image recognition component to recognize the actual coordinates of each cross mark; calculating the geometric distortion calibration compensation values of the first galvanometer and the second galvanometer according to the preset coordinates and the actual coordinates; and performing geometric distortion calibration on the first galvanometer and the second galvanometer based on the geometric distortion calibration compensation values.

[0060] In this embodiment, first, two galvanometers are controlled to engrave a cross mark matrix at the processing area of the engraving plate according to the preset coordinates. Then, the image recognition component is used to respectively recognize the actual coordinates of the cross marks engraved by the two galvanometers. Furthermore, by comparing the actual coordinates of each cross mark with the preset coordinates, the geometric distortion calibration compensation values of the two galvanometers can be obtained. The geometric distortion of the galvanometers is calibrated according to the geometric distortion calibration compensation values, thereby eliminating the influence of the geometric distortion of a single galvanometer on the engraving result, making the actual engraving position of the galvanometer the same as the preset engraving position, avoiding the situation where the spliced parts of the engraved graphics are discontinuous due to the geometric distortion of a single galvanometer, reducing the error at the spliced parts of the graphics, and improving the engraving effect.

[0061] In the above embodiment, the steps of offset calibration for the first galvanometer and the second galvanometer specifically include: keeping the workpiece stage stationary, controlling the first galvanometer and the second galvanometer to engrave a cross mark matrix at the preset coordinates on the engraving plate respectively; obtaining the preset optical center origin coordinates of the first galvanometer and the second galvanometer according to the preset coordinates; controlling the image recognition component to recognize the actual coordinates of the cross marks; obtaining the actual optical center origin coordinates of the first galvanometer and the second galvanometer according to the actual coordinates; calculating the offset calibration compensation values of the first galvanometer and the second galvanometer according to the preset optical center origin coordinates and the actual optical center origin coordinates of the first galvanometer and the second galvanometer; and performing offset calibration on the first galvanometer and the second galvanometer based on the offset calibration compensation values.

[0062] In this embodiment, the two galvanometers are controlled to engrave cross marks respectively according to the preset coordinates with the workpiece stage stationary. Then, the image recognition component is used to respectively recognize the actual coordinate values of the cross marks engraved by the two galvanometers. The actual optical center origin coordinates of the two galvanometers are obtained according to the actual coordinate values respectively, and the preset optical center origin coordinates are obtained according to the preset coordinates. Furthermore, the offset calibration compensation values of the two galvanometers can be obtained through the preset optical center origin coordinates and the actual optical center origin coordinates, thereby calibrating the optical center offset of the two galvanometers. For example, Figure 2As shown in the figure, the actual optical center origins (the intersection of the horizontal and vertical axes of the cross marks) O1 and O2 of the two galvanometers are identified by the image recognition component. Then, the offsets of the optical center origins of the two coordinate systems are obtained from the coordinates between the two actual optical center origins and the preset optical center origin. Furthermore, the distance offsets dx and dy of the optical center origins of the two galvanometers are obtained. Based on this, the offset calibration compensation value is calculated to adjust the optical center positions of the two galvanometers to meet the requirements, thereby eliminating the position deviation between the two galvanometers and making the patterns engraved by the two galvanometers more accurate when engraving graphics and texts later. This avoids the inability to connect the patterns engraved by the two galvanometers due to the deviation of the optical center position. For example, the coordinate values of the optical center origins of the two galvanometers should both be (0, 0) to ensure more accurate engraving of the spliced graphics and texts. However, in reality, the actual coordinates of the optical center origins of the two galvanometers are (0, 0) and (1, 1). At this time, the distance offsets dx and dy between the optical center origins of the two galvanometers are both 1. Offset calibration is performed by compensating the optical center origin so that both optical center origins are (0, 0).

[0063] In the above embodiment, the steps of performing scaling calibration on the first galvanometer and the second galvanometer specifically include: controlling the workpiece table to be stationary, and the first galvanometer and the second galvanometer respectively engraving a cross mark matrix on the engraving plate according to the preset coordinates; controlling the image recognition component to identify the actual coordinates of the cross marks; respectively obtaining the actual length and width of the cross mark matrix engraved by the first galvanometer and the second galvanometer according to the actual coordinates; obtaining the preset length and width of the cross mark matrix according to the preset coordinates; calculating the scaling calibration compensation values for the first galvanometer and the second galvanometer according to the preset length and width of the cross mark matrix and the actual length and width of the cross mark matrix; and performing scaling calibration on the first galvanometer and the second galvanometer based on the scaling calibration compensation values.

[0064] In this embodiment, first, the workbench is kept stationary, and the two galvanometers are controlled to engrave cross marks on the engraving plate according to the preset coordinates. The actual lengths and widths of the cross mark matrices engraved by the two galvanometers are respectively L1, L2 and L3, L4 identified by the image recognition component. By comparing the preset length and width of the cross mark matrix with the actual length and width obtained from the preset coordinates, the scaling error of the galvanometer can be determined. For example, the length and width of the cross mark matrix engraved according to the preset coordinates are both 5 mm. As a result, the actual lengths and widths of the cross mark matrix engraved by one galvanometer, that is, L1, L2, are both 4.9 mm, and the actual lengths and widths of the cross mark matrix engraved by the other galvanometer, that is, L3, L4, are both 5.1 mm. At this time, it is necessary to calibrate the galvanometer according to the ratio to make the ratios of the cross marks engraved by the two galvanometers the same, thereby eliminating the large error at the splicing part of the graphics and texts engraved later due to the different scaling ratios between the two galvanometers, and further resulting in an unsatisfactory engraving effect.

[0065] In the above embodiment, the steps for angle calibration of the first galvanometer and the second galvanometer specifically include: controlling the workpiece stage to be stationary, and controlling the first galvanometer and the second galvanometer to engrave a cross mark matrix at preset coordinates on the engraving plate respectively; controlling the image recognition component to recognize the actual coordinates of the cross marks; obtaining the actual optical center origin coordinates of the first galvanometer and the second galvanometer respectively according to the actual coordinates, as well as the horizontal and vertical axis directions of the first galvanometer and the second galvanometer, and establishing a coordinate system with the optical center origin as the coordinate origin; calculating the angle offsets of the axes of the first galvanometer and the second galvanometer based on the coordinate system; calculating the angle calibration compensation values of the first galvanometer and the second galvanometer according to the angle offsets; and performing angle calibration on the first galvanometer and the second galvanometer based on the angle calibration compensation values.

[0066] In this embodiment, when the workpiece stage is stationary, the two galvanometers are controlled to engrave cross marks according to the preset coordinates respectively. Then, the actual coordinate values of the cross marks engraved by the two galvanometers are recognized by the image recognition component respectively. The actual optical center origin coordinates of the two galvanometers are obtained according to the actual coordinate values, and the horizontal and vertical axis directions of the respective axes of the two galvanometers are fitted according to the actual coordinates of each cross mark. As Figure 2 shown, the respective coordinate axes X1, Y1 and X2, Y2 of the two galvanometers are fitted. Then, a coordinate system for each of the two galvanometers is established with the actual optical center origin as the coordinate origin. Furthermore, the angle offsets θ1 and θ2 of the respective axes of the two galvanometers are calculated based on the respective coordinate systems of the two galvanometers. Taking the coordinate system obtained from the cross mark matrix engraved according to the preset coordinates as the standard coordinate system, comparing the respective coordinate systems of the two galvanometers obtained according to the actual coordinates with the standard coordinate system, the included angles between the respective axis directions of the two galvanometers and the axis directions of the standard coordinate system can be obtained. Using the obtained angle calibration compensation values of the two galvanometers to calibrate the angle offsets of the two galvanometers, thereby eliminating the angle deviations of the two galvanometers, making the patterns engraved by the two galvanometers more accurate when engraving graphics and texts subsequently, and avoiding the inability to connect the patterns engraved by the two galvanometers separately due to the deviation of the optical center position.

[0067] In the above embodiment, the steps for splicing test and micro compensation of the first galvanometer and the second galvanometer specifically include: controlling the first galvanometer and the second galvanometer to engrave spliced graphics and texts, and recognizing the deviation of the overlapping area when the first galvanometer and the second galvanometer engrave the spliced graphics and texts through the image recognition component; when the deviation exceeds the preset deviation threshold, performing micro compensation on the first galvanometer and the second galvanometer.

[0068] In this embodiment, after calibration is performed through the above embodiment, a splicing test is carried out on the double galvanometers to make them engrave spliced graphics and texts, and the image recognition component is used to analyze the effect of the spliced engraving, that is, to recognize the deviation of the overlapping area of the spliced graphics and texts engraved by the double galvanometers, and when the deviation exceeds the preset deviation threshold, performing micro compensation on the double galvanometers.

[0069] In any of the above embodiments, as Figure 3 shown, the length of the overlapping area is 5 μm to 50 μm.

[0070] In this embodiment, due to the calibration in the above embodiment, the engraving system has minimized the error. When the engraving system is working, at the graphic splicing position, there is an overlapping part in the engraving paths of the two galvanometers, that is, there is an overlapping area 306 between the engraving line 302 of the first galvanometer and the engraving line 304 of the second galvanometer. This overlapping part is processed jointly by the two galvanometers. At the graphic splicing position, the length of the area jointly processed by the two galvanometers is 5 μm to 50 μm. After the above calibration compensation, the splicing effect of the engraved graphics is improved. By limiting the length of the area jointly processed by the two galvanometers, it is ensured that the engraved graphics of the two galvanometers are not finished engraving before the splicing is completed during the processing, and at the same time, excessive overlapping areas can be avoided, reducing the useless workload.

[0071] Furthermore, the preset deviation threshold at the graphic splicing position is between 0 μm and 3 μm.

[0072] The second aspect embodiment of the present invention provides a calibration device 400 for an engraving system, as Figure 4 shown, including: a memory 402, a processor 404, and a program stored on the memory 402 and executable on the processor 404. When the program is executed by the processor 404, it implements the steps defined in the calibration method provided in any of the above embodiments.

[0073] According to the calibration device 400 for an engraving system provided by the embodiment of the present invention, it includes a memory 402, a processor 404, and a program stored on the memory 402 and executable on the processor 404. When the program is executed by the processor 404, it implements the steps defined in any of the above calibration methods. At the same time, since the calibration device for the engraving system of the present application can implement the steps defined in any of the above calibration methods, the calibration device for the engraving system provided in this embodiment has all the beneficial effects of the calibration method for the engraving system provided in any of the above embodiments.

[0074] The third aspect embodiment of the present invention provides an engraving system, as Figure 5As shown, the overall layout of an engraving system is shown, including: a motion axis, the motion axis includes a first motion axis 510 and a second motion axis 512 arranged horizontally, and a third motion axis 514 arranged parallel to the first motion axis 510. The first motion axis 510 and the second motion axis 512 are perpendicular to each other, and the third motion axis 514 is higher than the first motion axis 510 and the second motion axis 512; a workpiece table 506 for placing and fixing the plate to be engraved, and the workpiece table can move along the first motion axis 510 and the second motion axis 512; a galvanometer, the galvanometer includes a first galvanometer 502 and a second galvanometer 504, which can move independently along the third motion axis 514 respectively; an image recognition component 508; and a calibration device of the engraving system as in the above embodiment.

[0075] In this embodiment, the engraving system includes a motion axis, a workpiece table 506, a galvanometer, an image recognition component 508, and a calibration device of the engraving system as in the above embodiment. Among them, the motion axis includes a first motion axis 510 and a second motion axis 512 arranged horizontally, and a third motion axis 514 arranged parallel to the first motion axis 510. The first motion axis 510 and the second motion axis 512 are perpendicular to each other, and the third motion axis 514 is higher than the first motion axis 510 and the second motion axis 512; a plate to be engraved is placed on the workpiece table 506 and fixed, and the workpiece table 506 can move along the first motion axis 510 and the second motion axis 512; the number of galvanometers is two, and they can move independently along the third motion axis 514 respectively; the image recognition component 508 can be used for auxiliary calibration through visual recognition; the calibration device of the engraving system can implement the steps defined in any of the above calibration methods. At the same time, since the engraving system of the present application includes a calibration device that can implement the steps defined in any of the above calibration methods, the engraving system provided in this embodiment has all the beneficial effects of the calibration methods of the engraving systems provided in any of the above embodiments.

[0076] Among them, the image recognition component 508 can be one or more, can be fixed on the galvanometer, can also move independently along the third motion axis 514 relative to the galvanometer, or can be fixed. When the image recognition component is fixed, the workpiece table can be moved for image recognition. When the image recognition component is movable, the workpiece table can be fixed and the image recognition component can be moved for image recognition.

[0077] An embodiment of the fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed, the steps of the calibration method in any of the above embodiments are implemented.

[0078] In this embodiment, when the computer program stored on the computer-readable storage medium is executed by a processor, the steps of the calibration method in any of the above embodiments can be implemented, and thus it has all the beneficial technical effects of the above calibration method, which will not be elaborated here.

[0079] The calibration method of the engraving system provided by the present application will be further introduced below in conjunction with a specific embodiment.

[0080] As Figure 6 shown, the calibration method of the engraving system specifically includes:

[0081] S602. Perform angle deviation calibration on the workpiece table so that the workpiece table and the engraving plate placed on the workpiece table can be parallel to the third movement axis along the first movement axis direction.

[0082] Specifically, S602 includes: controlling the workpiece table to move along the first movement axis, observing the workpiece table through the image recognition component until the workpiece table is adjusted to be parallel to the first movement axis along the first movement axis direction; controlling the workpiece table to be fixed, controlling the first galvanometer or the second galvanometer to move along the third movement axis and engrave cross marks at a preset interval, controlling the image recognition component to move along the third movement axis with the galvanometer, and identifying the actual coordinates of the cross marks on the engraving plate to obtain the actual interval between the cross marks; calculating the angle deviation calibration compensation value between the workpiece table along the first movement axis direction and the third movement axis according to the preset interval and the actual interval; after obtaining the angle deviation calibration compensation value, perform angle deviation calibration compensation on the workpiece table.

[0083] S604. Calibrate the movement error of the workpiece table along the first movement axis or the second movement axis so that the actual interval is the same as the preset interval when the workpiece table moves along the first movement axis or the second movement axis.

[0084] Specifically, S604 includes: controlling the workpiece table to move along the first movement axis or the second movement axis, fixing the galvanometer, controlling the first galvanometer or the second galvanometer to engrave cross marks on the engraving plate at a preset interval, and at the same time controlling the image recognition component to identify the actual coordinates of the cross marks to obtain the actual interval between the cross marks; calculating the movement calibration compensation value according to the preset interval and the actual interval; after obtaining the movement calibration compensation value, perform movement calibration compensation on the workpiece table.

[0085] S606. Calibrate the movement error of the first galvanometer or the second galvanometer along the third movement axis so that the actual interval when the first galvanometer or the second galvanometer moves along the third movement axis is the same as the preset interval.

[0086] Specifically, S606 includes: controlling the workpiece table to be stationary, while the first galvanometer or the second galvanometer moves along the third movement axis and engraves cross marks on the engraving plate at a preset interval, controlling the image recognition component to move with the first galvanometer or the second galvanometer, and identifying the actual coordinates of the cross marks to obtain the actual interval between the cross marks; calculating the movement calibration compensation value according to the preset interval and the actual interval; after obtaining the movement calibration compensation value, perform movement calibration compensation on the first galvanometer or the second galvanometer.

[0087] S608. Geometric distortion calibration is performed on the first galvanometer or the second galvanometer so that the actual spacing of the cross marks engraved by the first galvanometer or the second galvanometer is the same as the preset spacing.

[0088] Specifically, S608 includes: controlling the first galvanometer or the second galvanometer to engrave cross marks in an array at preset coordinates on the engraving plate; controlling the image recognition component to recognize the actual coordinates of each cross mark; calculating a coordinate calibration compensation value by comparing the preset coordinates with the actual coordinates; and performing coordinate calibration compensation on the first galvanometer or the second galvanometer after obtaining the coordinate calibration compensation value.

[0089] S610. Offset calibration and angle calibration are performed on the first galvanometer or the second galvanometer so that the position and angle of the cross marks engraved by the first galvanometer or the second galvanometer are the same as the preset position and preset angle.

[0090] Specifically, S610 includes: obtaining the optical center origin of the first galvanometer and the second galvanometer; respectively fitting a coordinate system with the optical center origin as the coordinate origin for the first galvanometer and the second galvanometer according to the cross marks; controlling the image recognition component to recognize the coordinate offset and angle offset of the optical center origin of the first galvanometer and the second galvanometer according to the coordinate system; calculating an offset calibration compensation value for the first galvanometer and the second galvanometer according to the coordinate offset; calculating an angle calibration compensation value for the first galvanometer and the second galvanometer according to the angle offset; and performing offset calibration compensation and angle calibration compensation on the first galvanometer and the second galvanometer after obtaining the offset calibration compensation value and the angle calibration compensation value.

[0091] S612. Scale calibration is performed on the first galvanometer or the second galvanometer so that the scale of the cross marks engraved by the first galvanometer or the second galvanometer is the same as the preset scale.

[0092] Specifically, S612 includes: controlling the workpiece table to be stationary, and the first galvanometer and the second galvanometer respectively engraving cross marks on the engraving plate at a preset spacing; obtaining the single-axis length of the cross marks respectively engraved by the first galvanometer and the second galvanometer; calculating a scale calibration compensation value for the first galvanometer and the second galvanometer according to the single-axis length of the cross marks; and performing scale calibration compensation on the first galvanometer and the second galvanometer after obtaining the scale calibration compensation value.

[0093] In this embodiment, the present application calibrates the motion errors of the workpiece stage, the first galvanometer, and the second galvanometer along the motion axis, and then calibrates the geometric distortion of a single galvanometer, and further calibrates the offset, angle, and ratio of the cross marks engraved by the two galvanometers. That is, the present application not only takes into account the position deviation of the two galvanometers, but also takes into account the angle error, etc. By eliminating the influence of errors in multiple aspects, it avoids the excessive error of the entire engraving system caused by the superposition of various errors, which affects the engraving effect. While improving the working efficiency of the engraving system by using a double galvanometer for plate engraving, it also eliminates the influence of various errors on the engraving effect, thereby improving the display effect of the engraved graphics and text.

[0094] In this specification, the term "a plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0096] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A calibration method for an engraving system, characterized in that The engraving system includes a motion axis, a workpiece table, a galvanometer, and an image recognition component. The motion axis includes a first motion axis and a second motion axis arranged horizontally, and a third motion axis arranged parallel to the first motion axis. The first motion axis and the second motion axis are perpendicular to each other. The third motion axis is higher than the first motion axis and the second motion axis. The workpiece table is used to place and fix the plate to be engraved. The workpiece table can move along the first motion axis and the second motion axis. The galvanometer includes a first galvanometer and a second galvanometer, which can move independently along the third motion axis. The calibration method includes the following steps: S102, calibrate the angular errors of the first motion axis, the second motion axis, and the third motion axis; S104, calibrate the geometric distortion of the first galvanometer and the second galvanometer; S106, calibrate the offset of the first galvanometer and the second galvanometer; S108, calibrate the scaling of the first galvanometer and the second galvanometer; S110, calibrate the angles of the first galvanometer and the second galvanometer; S112, conduct a splicing test and micro-compensation on the first galvanometer and the second galvanometer; The step of calibrating the angular errors of the first motion axis, the second motion axis, and the third motion axis specifically includes: Control the workpiece table to move along the first motion axis and the second motion axis, with the galvanometer fixed. Control the first galvanometer or the second galvanometer to engrave a first set of cross marks on the engraving plate according to the preset coordinates; Control the workpiece table to be stationary, control the first galvanometer or the second galvanometer to move along the third motion axis, and engrave a second set of cross marks on the engraving plate according to the preset coordinates; Control the image recognition component to identify the actual coordinates of the first set of cross marks and the second set of cross marks on the engraving plate; Calculate the angular error calibration compensation values between the first motion axis, the second motion axis, and the third motion axis according to the preset coordinates and the actual coordinates of the first set of cross marks and the second set of cross marks; Based on the angular error calibration compensation values, calibrate the angular errors of the first motion axis, the second motion axis, and the third motion axis; The step of conducting a splicing test and micro-compensation on the first galvanometer and the second galvanometer specifically includes: Control the first galvanometer and the second galvanometer to engrave the spliced graphics and texts, and identify the deviation of the overlapping area when the first galvanometer and the second galvanometer engrave the spliced graphics and texts through the image recognition component; When the deviation exceeds the preset deviation threshold, conduct micro-compensation on the first galvanometer and the second galvanometer.

2. The calibration method of the engraving system according to claim 1, characterized in that, The step of calibrating the geometric distortion of the first galvanometer and the second galvanometer specifically includes: Control the first galvanometer and the second galvanometer to engrave a cross mark matrix at the preset coordinates on the engraving plate; Control the image recognition component to identify the actual coordinates of each cross mark; Calculate the geometric distortion calibration compensation values of the first galvanometer and the second galvanometer according to the preset coordinates and the actual coordinates; Based on the geometric distortion calibration compensation value, perform geometric distortion calibration on the first galvanometer and the second galvanometer.

3. The calibration method of the engraving system according to claim 1, characterized in that, The steps of performing offset calibration on the first galvanometer and the second galvanometer specifically include: Control the workbench to be stationary, and control the first galvanometer and the second galvanometer to engrave a cross mark matrix at preset coordinates on the engraving plate respectively; Obtain the preset optical center origin coordinates of the first galvanometer and the second galvanometer according to the preset coordinates; Control the image recognition component to identify the actual coordinates of the cross marks; Obtain the actual optical center origin coordinates of the first galvanometer and the second galvanometer according to the actual coordinates; Calculate the offset calibration compensation values of the first galvanometer and the second galvanometer according to the preset optical center origin coordinates and the actual optical center origin coordinates of the first galvanometer and the second galvanometer; Based on the offset calibration compensation value, perform offset calibration on the first galvanometer and the second galvanometer.

4. The calibration method of the engraving system according to claim 1, wherein The steps of performing scaling calibration on the first galvanometer and the second galvanometer specifically include: Control the workbench to be stationary, and control the first galvanometer and the second galvanometer to engrave a cross mark matrix on the engraving plate according to preset coordinates respectively; Control the image recognition component to identify the actual coordinates of the cross marks; Obtain the actual length and width of the cross mark matrix engraved by the first galvanometer and the second galvanometer respectively according to the actual coordinates; Obtain the preset length and width of the cross mark matrix according to the preset coordinates; Calculate the scaling calibration compensation values of the first galvanometer and the second galvanometer according to the preset length and width of the cross mark matrix and the actual length and width of the cross mark matrix; Based on the scaling calibration compensation value, perform scaling calibration on the first galvanometer and the second galvanometer.

5. The calibration method of the engraving system according to claim 1, characterized in that, The steps of performing angle calibration on the first galvanometer and the second galvanometer specifically include: Control the workbench to be stationary, and control the first galvanometer and the second galvanometer to engrave a cross mark matrix at preset coordinates on the engraving plate respectively; Control the image recognition component to identify the actual coordinates of the cross marks; Obtain the actual optical center origin coordinates of the first galvanometer and the second galvanometer respectively according to the actual coordinates, and the horizontal and vertical coordinate axes directions of the first galvanometer and the second galvanometer, and establish a coordinate system with the optical center origin as the coordinate origin; Calculate the angle offsets of the coordinate axes of the first galvanometer and the second galvanometer based on the coordinate system; Calculate the angle calibration compensation values of the first galvanometer and the second galvanometer according to the angle offsets; Based on the angle calibration compensation value, perform angle calibration on the first galvanometer and the second galvanometer.

6. A calibration device for an engraving system, characterized in that, Include: A memory, a processor, and a program stored on the memory and executable on the processor, and when the program is executed by the processor, the steps defined in the calibration method of the engraving system according to any one of claims 1 to 5 are implemented.

7. A carving system, characterized in that, Include: Moving axes, the moving axes include a first moving axis and a second moving axis that are horizontally arranged, and a third moving axis that is arranged parallel to the first moving axis, the first moving axis and the second moving axis are perpendicular to each other, and the third moving axis is higher than the first moving axis and the second moving axis; A workpiece table for placing and fixing the plate to be engraved, the workpiece table can move along the first moving axis and the second moving axis; Galvanometers, the galvanometers include a first galvanometer and a second galvanometer, and can move independently along the third moving axis respectively; An image recognition component; The calibration device of the engraving system as described in claim 6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, the steps of the calibration method as described in any one of claims 1 to 5 are implemented.

Images