CN110816082B - Method, device and equipment for obtaining alignment error value of spray head and storage medium - Google Patents
Method, device and equipment for obtaining alignment error value of spray head and storage medium Download PDFInfo
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- CN110816082B CN110816082B CN201911026851.2A CN201911026851A CN110816082B CN 110816082 B CN110816082 B CN 110816082B CN 201911026851 A CN201911026851 A CN 201911026851A CN 110816082 B CN110816082 B CN 110816082B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
- B41J3/543—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements with multiple inkjet print heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
- B41J2/11—Ink jet characterised by jet control for ink spray
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
- B41J2/12—Ink jet characterised by jet control testing or correcting charge or deflection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
Abstract
The invention discloses a method, a device, equipment and a storage medium for acquiring a nozzle alignment error value, wherein the method comprises the following steps: acquiring first horizontal reference image data, and controlling a first nozzle to perform ink jet printing according to the first horizontal reference image data to obtain a first horizontal reference image; moving the second head or the printing medium such that the second head is positioned below the first horizontal reference image; acquiring first horizontal calibration image data, and controlling a second spray head to perform ink-jet printing according to the first horizontal calibration image data to obtain a first horizontal calibration image; obtaining a first horizontal alignment error value of the first spray head and the second spray head according to the first horizontal reference image and the first horizontal calibration image; the first horizontal reference image is a scale marked with pixel values in the horizontal direction, the first horizontal calibration image is a regular triangle, and one vertex of the regular triangle is overlapped with the scale. The method is convenient and quick, does not need additional calculation, and simply, clearly and accurately obtains the first horizontal alignment error value.
Description
Technical Field
The invention relates to the technical field of ink-jet printing, in particular to a method, a device, equipment and a storage medium for acquiring a nozzle alignment error value.
Background
The ink jet printing technology refers to a technology of ejecting ink droplets through nozzles on an ejection head onto a printing medium to obtain an image or characters. Since the size of the nozzle is usually small relative to the size of the image, printing a complete image usually requires multiple strokes of the nozzle. In order to improve the efficiency of printing images, the prior art generally installs several identical nozzles in the longitudinal direction and prints several nozzles in the longitudinal direction as one nozzle, thereby improving the efficiency of printing images, but when installing the nozzles, it is necessary to ensure that the distance Y2 between the starting end nozzle or the end nozzle of the nozzle and the end nozzle or the starting end nozzle of the adjacent nozzle is equal to the distance Y1 between two adjacent nozzles on the nozzle, as in the ideal state of fig. 1. However, because the mechanical error between the nozzles often fails to reach an ideal state, if a plurality of nozzles are still used as one nozzle for printing, the errors between the nozzles will cause the printed products to overlap or blank, which affects the product quality. If the alignment error value of the nozzle is known, the error value can be input into the ink jet printing controller, and the ink jet printing controller can eliminate the alignment error of the nozzle by adjusting the movement or ink outlet position of the nozzle according to the error value, so that how to accurately obtain the alignment error value of the nozzle is the key for solving the alignment error of the nozzle.
As disclosed in chinese patent application No. 200410004146.X of fig. 2, a method for obtaining a head alignment error value, specifically, printing a preset test pattern on a sheet using first and second print heads according to an input correction signal, measuring the positions of a start point and an end point of each scanned test pattern, calculating a horizontal printing alignment error between the first and second print heads according to the start point of the scanned test pattern, calculating a vertical printing alignment error between the first and second print heads according to the start point and the end point of the scanned test pattern, the test pattern including the shape of a right triangle; the method needs extra measurement and calculation to obtain the error value, is more complicated, needs extra scanning equipment to obtain a test calculation value, and increases the printing cost.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for acquiring a spray head alignment error value, which are used for solving the problems of complexity and high cost of the method for acquiring the spray head alignment error value in the prior art.
In a first aspect, an embodiment of the present invention provides a method for obtaining an alignment error value of a nozzle, where the method includes:
acquiring first horizontal reference image data, and controlling a first nozzle to perform ink jet printing according to the first horizontal reference image data to obtain a first horizontal reference image;
moving a second nozzle or a printing medium so that the second nozzle is positioned below the first horizontal reference image, wherein the lower direction is the direction opposite to the moving direction of the second nozzle or the printing medium;
acquiring first horizontal calibration image data, and controlling the second spray head to perform ink-jet printing according to the first horizontal calibration image data to obtain a first horizontal calibration image;
obtaining a first horizontal alignment error value of the first nozzle and the second nozzle according to the first horizontal reference image and the first horizontal calibration image;
the first horizontal reference image is a scale marked with pixel values in the horizontal direction, the first horizontal calibration image is a regular triangle, and one vertex of the regular triangle is overlapped with the scale.
Preferably, the method further comprises:
acquiring second horizontal reference image data, and controlling a first spray head to perform ink jet printing according to the second horizontal reference image data to obtain a second horizontal reference image;
moving a second nozzle or a printing medium such that the second nozzle is located at the second horizontal reference image;
acquiring second horizontal calibration image data, and controlling the second nozzle to perform ink-jet printing according to the second horizontal calibration image data to obtain a second horizontal calibration image;
and obtaining a second horizontal alignment error value of the first spray head and the second spray head according to the second horizontal reference image and the second horizontal calibration image.
Preferably, the method further comprises:
controlling the second nozzle to perform ink jet printing according to the second horizontal alignment error value and the second horizontal calibration image data to obtain a horizontal verification image;
and judging whether the acquired second horizontal alignment error value is correct or not according to the second horizontal reference image and the horizontal verification image.
Preferably, the method further comprises:
acquiring first vertical reference image data, and controlling a first nozzle to perform ink jet printing according to the first vertical reference image data to obtain a first vertical reference image;
moving a second nozzle or a printing medium such that the second nozzle is positioned below the first vertical reference image;
acquiring first vertical calibration image data, and controlling the second spray head to perform ink-jet printing according to the first vertical calibration image data to obtain a first vertical calibration image;
obtaining a first vertical alignment error value of the first nozzle and the second nozzle according to the first vertical reference image and the first vertical calibration image;
the first vertical reference image is a graduated scale marked with pixel values in the vertical direction, the first vertical calibration image is a regular triangle, and one vertex of the regular triangle of the first vertical calibration image is overlapped with the graduated scale.
Preferably, a pixel value of one vertex of the regular triangle of the first horizontal calibration image coinciding with the scale is equal to a pixel value of a zero point of the scale.
Preferably, the obtaining a first horizontal alignment error value of the first and second nozzles from the first horizontal reference image and the first horizontal calibration image comprises:
and acquiring a scale value of the alignment of the first horizontal calibration image and the first horizontal reference image, wherein the scale value is the first horizontal alignment error value.
In a second aspect, an embodiment of the present invention provides an apparatus for obtaining an alignment error value of a nozzle, where the apparatus includes:
the first horizontal reference image acquisition module is used for acquiring first horizontal reference image data and controlling a first spray head to perform ink-jet printing according to the first horizontal reference image data to obtain a first horizontal reference image;
a first stepping module, configured to move a second nozzle or a print medium so that the second nozzle is located below the first horizontal reference image, where the lower side is a direction in which the second nozzle or the print medium moves in an opposite direction;
the first horizontal calibration image acquisition module is used for acquiring first horizontal calibration image data and controlling the second spray head to perform ink-jet printing according to the first horizontal calibration image data to obtain a first horizontal calibration image;
a first horizontal alignment error value obtaining module, configured to obtain a first horizontal alignment error value of the first nozzle and the second nozzle according to the first horizontal reference image and the first horizontal calibration image;
the first horizontal reference image is a scale marked with pixel values in the horizontal direction, the first horizontal calibration image is a regular triangle, and one vertex of the regular triangle is overlapped with the scale.
Preferably, the apparatus further comprises:
the second horizontal reference image acquisition module is used for acquiring second horizontal reference image data and controlling the first spray head to perform ink jet printing according to the second horizontal reference image data to obtain a second horizontal reference image;
a second stepping module for moving a second nozzle or a printing medium such that the second nozzle is located at the second horizontal reference image;
the second horizontal calibration image acquisition module is used for acquiring second horizontal calibration image data and controlling the second spray head to perform ink-jet printing according to the second horizontal calibration image data to obtain a second horizontal calibration image;
and the second horizontal alignment error value acquisition module is used for acquiring a second horizontal alignment error value of the first spray head and the second spray head according to the second horizontal reference image and the second horizontal calibration image.
In a third aspect, an embodiment of the present invention provides an apparatus for obtaining an alignment error value of a nozzle, including: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method of the first aspect of the embodiments described above.
In a fourth aspect, embodiments of the present invention provide a storage medium having stored thereon computer program instructions, which when executed by a processor, implement the method of the first aspect in the above embodiments.
In summary, in the method, the first horizontal alignment error value is obtained by comparing the first horizontal reference image printed by the first nozzle with the first horizontal calibration image, and the first horizontal reference image in the method is a scale marked with pixel values, so that the first horizontal alignment error value can be directly obtained at the alignment position of the first horizontal reference image through the first horizontal calibration image, which is convenient and fast, and does not need additional calculation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Figure 1 is one way of mounting a prior art sprinkler.
Fig. 2 is a method for acquiring a nozzle alignment calibration value in the prior art.
Fig. 3 is a flowchart of a method for acquiring a nozzle alignment calibration value according to a first embodiment of the present invention.
Fig. 4 is a schematic diagram of a first horizontal reference image in the method for acquiring the alignment calibration value of the nozzle according to the first embodiment of the present invention.
Fig. 5 is a schematic diagram of a first horizontal calibration image and a first horizontal reference image in the method for acquiring the alignment calibration value of the nozzle according to the first embodiment of the present invention.
Fig. 6 is a flowchart of a method for acquiring a nozzle alignment calibration value according to a second embodiment of the present invention.
Fig. 7 is a schematic diagram of a second horizontal reference image in the method for acquiring the alignment calibration value of the nozzle according to the second embodiment of the present invention.
Fig. 8 is a schematic diagram of a second horizontal calibration image in the method for acquiring the alignment calibration value of the nozzle according to the second embodiment of the present invention.
Fig. 9 is a schematic diagram of the superposition of the second horizontal reference image and the second horizontal calibration image in the method for acquiring the nozzle alignment calibration value according to the second embodiment of the present invention.
Fig. 10 is a flowchart of a method for acquiring a nozzle alignment calibration value according to a third embodiment of the present invention.
Fig. 11 is a flowchart of a method for acquiring a nozzle alignment calibration value according to a fourth embodiment of the present invention.
Fig. 12 is a schematic diagram of a first vertical reference image and a first vertical calibration image of a method of acquiring a nozzle alignment calibration value according to a fourth embodiment of the present invention.
Fig. 13 is a schematic structural diagram of an apparatus for acquiring a nozzle alignment calibration value according to an embodiment of the present invention.
Fig. 14 is a schematic structural diagram of an apparatus for acquiring a nozzle alignment calibration value according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 3, an embodiment of the present invention provides a method for obtaining a nozzle alignment error value, where the method may directly obtain a first horizontal alignment error value at an alignment position of a first horizontal reference image through a first horizontal calibration image, and is convenient and fast, and no additional calculation is needed, and the first horizontal calibration image is a regular triangle, and a vertex of the regular triangle is overlapped with the scale, so that the first horizontal alignment error value may be obtained simply, clearly and accurately. The method specifically comprises the following steps:
s1, acquiring first horizontal reference image data, and controlling a first nozzle to perform ink jet printing according to the first horizontal reference image data to obtain a first horizontal reference image;
specifically, a horizontal reference image to be printed is imported into raster image processing software to be subjected to screening and other processing to generate a data file which can be identified by a printer, then the data file is imported into printing control software to generate first horizontal reference image data and a printing control command which can be printed according to a set printing requirement, the first horizontal reference image data and the printing control command are input into a main control board in printing equipment through a bus, the main control board distributes the first horizontal reference image data and the printing control command to a nozzle drive plate of each first nozzle, and the nozzle drive plate drives the first nozzles to perform ink-jet printing according to the first horizontal reference image data to obtain a first horizontal reference image. The raster image processing software can identify the images to be printed in formats such as BMP, TIFF, JPG, PDF and the like, can perform typesetting processing on a plurality of images, and can perform screening processing and color processing on the images. In this embodiment, the data file format output by the raster image processing software is PRN format, the horizontal reference image is a black and white image, and a color reference image can be printed by some color inkjet printers.
As shown in fig. 1, a nozzle unit of the conventional inkjet printing apparatus is formed by splicing a plurality of nozzles in a vertical direction, so as to increase the width of the nozzles for one-time scanning printing, and when acquiring a nozzle alignment error calibration value, two nozzles are generally calibrated and acquired, for example, a first nozzle is calibrated with a second nozzle, a second nozzle is calibrated with a third nozzle, and so on; meanwhile, one of the nozzles can be selected as a reference nozzle, and then the other nozzles and the reference nozzle are calibrated one by one, wherein the generally selected reference nozzle is the first nozzle in the nozzle unit; the horizontal reference image used is the same regardless of the contrast method selected.
Referring to fig. 4, in the embodiment, the first horizontal reference image is a scale marked with pixel values in the horizontal direction, and the scale not only has standard values such as-800, -600, -400, -200, 0, 200, 400, 600, etc., but also has small scale lines, so that for a nozzle with a large error and which cannot accurately position the error value at one time, the alignment error between nozzles can be conveniently positioned at the first time.
S2, moving a second spray head or a printing medium to enable the second spray head to be positioned below the first horizontal reference image, wherein the lower side is the direction opposite to the moving direction of the second spray head or the printing medium;
specifically, the height of the first nozzle in the vertical direction is obtained, and the second nozzle or the printing medium is controlled to move in the vertical direction by a distance smaller than the height of the first nozzle, so that the second nozzle is located below the horizontal reference image, i.e., in the direction opposite to the vertical direction, and the interval between the first horizontal calibration image and the first horizontal reference image is ensured not to exceed 2 pixels, which is convenient for comparing the first horizontal calibration image printed by the second nozzle with the first horizontal reference image printed by the first nozzle. The modules controlling the movement are different for different printing devices, such as the printer advances in the vertical direction by moving the printing medium, and the flat printer advances in the vertical direction by moving the head unit.
S3, acquiring first horizontal calibration image data, and controlling the second spray head to perform ink jet printing according to the first horizontal calibration image data to obtain a first horizontal calibration image;
specifically, a horizontal calibration image to be printed is imported into raster image processing software to be processed by screening and the like to generate a data file which can be identified by a printer, then the data file is imported into printing control software to generate first horizontal calibration image data and a printing control command which can be printed according to a set printing requirement, the first horizontal calibration image data and the printing control command are input into a main control board in printing equipment through a bus, the main control board distributes the first horizontal calibration image data and the printing control command to nozzle drive boards of second nozzles, and the nozzle drive boards drive the second nozzles to perform ink-jet printing according to the first horizontal calibration image data to obtain a first horizontal calibration image.
Please refer to fig. 5, which is a schematic diagram of a first horizontal reference image and a first horizontal calibration image, where the first horizontal calibration image is a regular triangle, and a vertex of the first horizontal calibration image is coincident with the scale, so as to facilitate comparison and obtain an error value, and further to obtain the error value intuitively, a pixel value of a vertex of the regular triangle coincident with the scale is equal to a pixel value of a zero point of the scale, so that a vertex of the regular triangle is coincident with the scale, and an alignment error value of the first nozzle and the second nozzle in a horizontal direction is what, and as shown in fig. 5, a vertex of the triangle is coincident with a zero point of the scale, it indicates that an alignment error value of the first nozzle and the second nozzle in a horizontal direction is zero.
S4, obtaining a first horizontal alignment error value of the first nozzle and the second nozzle according to the first horizontal reference image and the first horizontal calibration image;
specifically, please continue to refer to fig. 5, the alignment values of the triangle in the first horizontal calibration image and the scale of the first horizontal reference image are obtained, and the alignment error between the first nozzle and the second nozzle is directly read.
Referring to fig. 6, only the error value between the nozzles can be obtained primarily through the triangle and the scale, and the obtaining of the accurate error value between the first nozzle and the second nozzle further requires printing a second horizontal reference image and a second horizontal calibration image, which specifically includes the following steps:
s61, acquiring second horizontal reference image data, and controlling the first nozzle to perform ink jet printing according to the second horizontal reference image data to obtain a second horizontal reference image;
s62, moving a second nozzle or a printing medium such that the second nozzle is located at the second horizontal reference image;
s63, acquiring second horizontal calibration image data, and controlling the second nozzle to perform ink jet printing according to the second horizontal calibration image data to obtain a second horizontal calibration image;
and S64, obtaining a second horizontal alignment error value of the first spray head and the second spray head according to the second horizontal reference image and the second horizontal calibration image.
Specifically, referring to fig. 7, 8 and 9, the second horizontal reference image is formed by arranging a plurality of unit patterns 41 in the horizontal direction, and one unit pattern 41 is formed by arranging a color patch 411 and a line segment 412 in the horizontal direction. Therefore, the color blocks 411 and the line segments 412 in the second horizontal calibration image aligned with the second horizontal reference image can be quickly and accurately identified, and meanwhile, the problem that when the unit pattern 41 adopts a single pattern, the 3 rd unit pattern in the second horizontal calibration image cannot be quickly and accurately identified when the 2 nd unit pattern in the second horizontal calibration image is aligned with the second horizontal reference image is also avoided. One of the unit patterns 41 may also be formed by two different color blocks 411 arranged in the horizontal direction. Furthermore, the spacing distance between two adjacent unit patterns 41 is greater than the width of the unit patterns, the spacing distance between two adjacent unit patterns 41 is recorded as n, n is greater than or equal to 90 pixels, and experimental research shows that the alignment error value of the manually installed nozzle is generally not greater than 90 pixels, so that when the spacing distance n between two adjacent unit patterns 41 is greater than or equal to 90 pixels, if the unit patterns are not installed incorrectly or printed incorrectly, the 3 rd unit pattern in the second horizontal calibration image is not aligned with the 2 nd unit pattern in the second horizontal reference image, and the probability of judgment errors is avoided. Meanwhile, in order to make the second horizontal reference image and the second horizontal calibration image more obvious in comparison, the spacing distance between two adjacent unit patterns 41 is relatively suitable to be 500 pixels. Referring to fig. 7, in the present embodiment, the spacing distance between all the unit patterns 41 is the same as 500 pixels, which facilitates the observation of the contrast between the second horizontal reference image and the second horizontal calibration image, and the spacing distance between the unit patterns 41 may be different, which is not limited in this embodiment.
The second horizontal calibration image is also composed of a plurality of the unit patterns 41 arranged in the horizontal direction, one unit pattern 41 is composed of a color patch 411 and a line segment 412 arranged in the horizontal direction, and the unit patterns 41 in the second horizontal calibration image correspond to the unit patterns 41 in the second horizontal reference image one to one, each of the unit patterns 41 in the second horizontal calibration image differs from the printing pixel value of the unit pattern 41 in the corresponding second horizontal reference image in the horizontal direction by m pixels, m being an integer, as the second horizontal reference image includes 5 unit patterns 41, the actual printing pixel values of the 5 unit patterns from left to right are: 1000. 1500, 2000, 2500, 3000, respectively, the corresponding second horizontal calibration image also includes 5 unit patterns 41, and the actual printed pixel values of the 5 unit patterns 41 from left to right are: 998. 1499, 2000, 2501, 3002, the actual printed pixel difference values of the 5 unit patterns 41 in the second horizontal reference image and the 5 unit patterns 41 in the second horizontal calibration image are: -2, -1, 0, 1, 2. The unit graphs in the second horizontal calibration image and the second horizontal reference image are the same, so that the comparison is convenient to obtain an error value.
Meanwhile, m values are marked below each unit graph in the second horizontal calibration image, so that when the second horizontal reference image is compared with the second horizontal calibration image, calibration values can be directly obtained according to the marked m values, extra calculation is not needed, and research personnel can also know the deviation condition of the spray head at a glance, thereby facilitating research such as spray head offset development. Meanwhile, the m value may also be marked on the unit graph in the second horizontal reference image, and the specific marked position of the m value is not specifically limited herein.
Referring to fig. 10, after obtaining the horizontal error value, whether the error value is correct or not needs to be verified, the verification method includes:
s65, controlling the second nozzle to perform ink jet printing according to the second horizontal alignment error value and the second horizontal calibration image data to obtain a horizontal verification image;
and S66, judging whether the second horizontal alignment error value is correct or not according to the second horizontal reference image and the horizontal verification image.
Specifically, an error value of the first nozzle and the second nozzle in the horizontal direction is input into a nozzle calibration window of the printing control software, the printing control software outputs a printing control command according to a horizontal alignment error value, the second nozzle is controlled according to the printing control command to perform inkjet printing according to the second horizontal calibration image data to obtain a horizontal verification image, the horizontal verification image and the second horizontal calibration image are compared as the second horizontal reference image and the second horizontal calibration image are compared, whether the error value is correct or not is judged, the error value is accurately obtained when the horizontal verification image and a unit pattern in the second horizontal calibration image are not deviated, and the error value is not accurately obtained when the horizontal verification image and the unit pattern in the second horizontal calibration image are deviated.
Referring to fig. 11, the method for obtaining the vertical alignment error value includes:
s111, acquiring first vertical reference image data, and controlling a first nozzle to perform ink jet printing according to the first vertical reference image data to obtain a first vertical reference image;
s112, moving a second spray head or a printing medium to enable the second spray head to be positioned below the first vertical reference image;
s113, acquiring first vertical calibration image data, and controlling the second nozzle to perform ink jet printing according to the first vertical calibration image data to obtain a first vertical calibration image;
s114, obtaining a first vertical alignment error value of the first spray head and the second spray head according to the first vertical reference image and the first vertical calibration image;
specifically, referring to fig. 12, the first vertical reference image is a scale marked with pixel values in the vertical direction, the first vertical calibration image is a regular triangle, one vertex of the regular triangle coincides with the scale, and an alignment error value between the first nozzle and the second nozzle is directly read according to an acquired alignment value between the triangle in the first vertical calibration image and the scale of the first vertical reference image. After the first vertical error value is initially obtained, a second vertical error value is obtained according to a method for obtaining a second horizontal error value, and finally the second vertical error value is verified.
Referring to fig. 13, an embodiment of the present invention provides an apparatus for obtaining a nozzle alignment calibration value, where the apparatus includes:
a first horizontal reference image obtaining module 10, configured to obtain first horizontal reference image data, and control a first nozzle to perform inkjet printing according to the first horizontal reference image data to obtain a first horizontal reference image;
a first stepping module 20, configured to move a second nozzle or a printing medium such that the second nozzle is located below the first horizontal reference image, where the lower side is a direction opposite to a moving direction of the second nozzle or the printing medium;
a first horizontal calibration image obtaining module 30, configured to obtain first horizontal calibration image data, and control the second nozzle to perform inkjet printing according to the first horizontal calibration image data to obtain a first horizontal calibration image;
a first horizontal alignment error value obtaining module 40, configured to obtain a first horizontal alignment error value of the first nozzle and the second nozzle according to the first horizontal reference image and the first horizontal calibration image;
the first horizontal reference image is a scale marked with pixel values in the horizontal direction, the first horizontal calibration image is a regular triangle, and one vertex of the regular triangle is overlapped with the scale.
Preferably, the apparatus further comprises:
the second horizontal reference image acquisition module is used for acquiring second horizontal reference image data and controlling the first spray head to perform ink jet printing according to the second horizontal reference image data to obtain a second horizontal reference image;
a second stepping module for moving a second nozzle or a printing medium such that the second nozzle is located at the second horizontal reference image;
the second horizontal calibration image acquisition module is used for acquiring second horizontal calibration image data and controlling the second spray head to perform ink-jet printing according to the second horizontal calibration image data to obtain a second horizontal calibration image;
and the second horizontal alignment error value acquisition module is used for acquiring a second horizontal alignment error value of the first spray head and the second spray head according to the second horizontal reference image and the second horizontal calibration image.
Preferably, the apparatus further comprises:
the horizontal verification image acquisition module is used for controlling the second spray head to perform ink-jet printing according to the second horizontal alignment error value and the second horizontal calibration image data to acquire a horizontal verification image;
and the judging module is used for judging whether the acquired second horizontal alignment error value is correct or not according to the second horizontal reference image and the horizontal verification image.
Preferably, the apparatus further comprises:
the first vertical reference image acquisition module is used for acquiring first vertical reference image data and controlling a first nozzle to perform ink-jet printing according to the first vertical reference image data to obtain a first vertical reference image;
a third stepping module for moving a second nozzle or a printing medium such that the second nozzle is positioned below the first vertical reference image;
the first vertical calibration image acquisition module is used for acquiring first vertical calibration image data and controlling the second spray head to perform ink-jet printing according to the first vertical calibration image data to obtain a first vertical calibration image;
a first vertical alignment error value obtaining module, configured to obtain a first vertical alignment error value of the first nozzle and the second nozzle according to the first vertical reference image and the first vertical calibration image;
the first vertical reference image is a graduated scale marked with pixel values in the vertical direction, the first vertical calibration image is a regular triangle, and one vertex of the regular triangle of the first vertical calibration image is overlapped with the graduated scale.
Preferably, a pixel value of one vertex of the regular triangle of the first horizontal calibration image coinciding with the scale is equal to a pixel value of a zero point of the scale.
Preferably, the first horizontal alignment error value obtaining module includes:
a first horizontal alignment error value obtaining unit, configured to obtain a scale value of the first horizontal calibration image aligned with the first horizontal reference image, where the scale value is the first horizontal alignment error value.
In addition, the method for obtaining the error value of the nozzle alignment according to the embodiment of the present invention described in conjunction with fig. 3 may be implemented by an apparatus for obtaining the error value of the nozzle alignment. FIG. 14 is a schematic diagram of a hardware configuration of an apparatus for obtaining a misalignment value of a nozzle according to an embodiment of the present invention.
The apparatus for obtaining a value for a misalignment of a nozzle tip may include a processor 401 and a memory 402 having computer program instructions stored therein.
Specifically, the processor 401 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing embodiments of the present invention.
The processor 401 may be configured to implement any of the above-described embodiments for obtaining a value of a showerhead alignment error by reading and executing computer program instructions stored in the memory 402.
In one example, the apparatus for obtaining a value for a misalignment of a nozzle tip may also include a communication interface 403 and a bus 410. As shown in fig. 14, the processor 401, the memory 402, and the communication interface 403 are connected by a bus 410 to complete communication therebetween.
The communication interface 403 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.
In addition, in combination with the method for obtaining the error value of the nozzle alignment in the above embodiments, an embodiment of the present invention may provide a computer-readable storage medium to implement the method. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the above-described embodiments of a method for obtaining a showerhead alignment error value.
In summary, in the method, the first horizontal alignment error value is obtained by comparing the first horizontal reference image printed by the first nozzle with the first horizontal calibration image, and the first horizontal reference image in the method is a scale marked with pixel values, so that the first horizontal alignment error value can be directly obtained at the alignment position of the first horizontal reference image through the first horizontal calibration image, which is convenient and fast, and does not need additional calculation.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A method of obtaining a showerhead alignment error value, the method comprising:
acquiring first horizontal reference image data, and controlling a first nozzle to perform ink jet printing according to the first horizontal reference image data to obtain a first horizontal reference image;
moving a second nozzle or a printing medium so that the second nozzle is positioned below the first horizontal reference image, wherein the lower direction is the direction opposite to the moving direction of the second nozzle or the printing medium;
acquiring first horizontal calibration image data, and controlling the second spray head to perform ink-jet printing according to the first horizontal calibration image data to obtain a first horizontal calibration image;
obtaining a first horizontal alignment error value of the first nozzle and the second nozzle according to the first horizontal reference image and the first horizontal calibration image;
the first horizontal reference image is a scale marked with pixel values in the horizontal direction, the first horizontal calibration image is a regular triangle, and one vertex of the regular triangle is overlapped with the scale.
2. The method of obtaining a value for a misalignment of a showerhead as defined in claim 1, further comprising:
acquiring second horizontal reference image data, and controlling a first spray head to perform ink jet printing according to the second horizontal reference image data to obtain a second horizontal reference image;
moving a second nozzle or a printing medium such that the second nozzle is located at the second horizontal reference image;
acquiring second horizontal calibration image data, and controlling the second nozzle to perform ink-jet printing according to the second horizontal calibration image data to obtain a second horizontal calibration image;
and obtaining a second horizontal alignment error value of the first spray head and the second spray head according to the second horizontal reference image and the second horizontal calibration image.
3. The method of obtaining a value for a misalignment of a showerhead as defined in claim 2, further comprising:
controlling the second nozzle to perform ink jet printing according to the second horizontal alignment error value and the second horizontal calibration image data to obtain a horizontal verification image;
and judging whether the acquired second horizontal alignment error value is correct or not according to the second horizontal reference image and the horizontal verification image.
4. The method of claim 1 or 3, wherein the method further comprises:
acquiring first vertical reference image data, and controlling a first nozzle to perform ink jet printing according to the first vertical reference image data to obtain a first vertical reference image;
moving a second nozzle or a printing medium such that the second nozzle is positioned below the first vertical reference image;
acquiring first vertical calibration image data, and controlling the second spray head to perform ink-jet printing according to the first vertical calibration image data to obtain a first vertical calibration image;
obtaining a first vertical alignment error value of the first nozzle and the second nozzle according to the first vertical reference image and the first vertical calibration image;
the first vertical reference image is a scale marked with pixel values in the vertical direction, the first vertical calibration image is a regular triangle, and one vertex of the regular triangle of the first vertical calibration image is overlapped with the scale of the first vertical reference image.
5. The method of claim 1 or 2, wherein the pixel value of the vertex of the regular triangle of the first horizontal calibration image coinciding with the scale is equal to the pixel value of the zero point of the scale.
6. The method of claim 5, wherein obtaining a first horizontal alignment error value for the first showerhead and the second showerhead from the first horizontal reference image and the first horizontal calibration image comprises:
and acquiring a scale value of the alignment of the first horizontal calibration image and the first horizontal reference image, wherein the scale value is the first horizontal alignment error value.
7. An apparatus for obtaining a misalignment value of a showerhead, the apparatus comprising:
the first horizontal reference image acquisition module is used for acquiring first horizontal reference image data and controlling a first spray head to perform ink-jet printing according to the first horizontal reference image data to obtain a first horizontal reference image;
a first stepping module, configured to move a second nozzle or a print medium so that the second nozzle is located below the first horizontal reference image, where the lower side is a direction in which the second nozzle or the print medium moves in an opposite direction;
the first horizontal calibration image acquisition module is used for acquiring first horizontal calibration image data and controlling the second spray head to perform ink-jet printing according to the first horizontal calibration image data to obtain a first horizontal calibration image;
a first horizontal alignment error value obtaining module, configured to obtain a first horizontal alignment error value of the first nozzle and the second nozzle according to the first horizontal reference image and the first horizontal calibration image;
the first horizontal reference image is a scale marked with pixel values in the horizontal direction, the first horizontal calibration image is a regular triangle, and one vertex of the regular triangle is overlapped with the scale.
8. The apparatus of claim 7, wherein the apparatus further comprises:
the second horizontal reference image acquisition module is used for acquiring second horizontal reference image data and controlling the first spray head to perform ink jet printing according to the second horizontal reference image data to obtain a second horizontal reference image;
a second stepping module for moving a second nozzle or a printing medium such that the second nozzle is located at the second horizontal reference image;
the second horizontal calibration image acquisition module is used for acquiring second horizontal calibration image data and controlling the second spray head to perform ink-jet printing according to the second horizontal calibration image data to obtain a second horizontal calibration image;
and the second horizontal alignment error value acquisition module is used for acquiring a second horizontal alignment error value of the first spray head and the second spray head according to the second horizontal reference image and the second horizontal calibration image.
9. An apparatus for obtaining a showerhead alignment error value, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of claims 1-6.
10. A storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 1-6.
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| CN114055932B (en) * | 2020-07-30 | 2022-10-21 | 深圳市汉森软件有限公司 | Method, device and equipment for printing on surface of rotating body and storage medium |
| CN112319066B (en) * | 2020-09-10 | 2022-07-22 | 季华实验室 | Ink-jet printing head splicing correction system and correction method thereof |
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| CN115384186B (en) * | 2021-05-20 | 2023-09-08 | 深圳市汉森软件有限公司 | Spray nozzle posture calibration method, device and equipment |
| CN115503345B (en) * | 2021-06-23 | 2023-08-15 | 深圳市汉森软件有限公司 | Method, device, equipment and storage medium for calibrating positions of two adjacent rows of nozzles |
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