Method, device and equipment for real-time detection of air pressure of automatic ink supply of spray head and storage medium

Abstract

The present application belongs to the technical field of industrial inkjet printing, and solves the technical problem of poor printing quality caused by the fact that the suction force of the preset negative pressure on the ink does not meet the requirements due to the equipment difference and environment difference of the inkjet printer, resulting in unstable ink supply effect. A nozzle automatic ink supply air pressure real-time detection method, device, equipment and storage medium are provided. The method comprises: obtaining each ink leakage detection image of the nozzle ink leakage detection according to a first interval time; determining the ink leakage information of the nozzle according to the image information of each ink leakage detection image; adjusting the air pressure of the ink supply mechanism of the nozzle according to the ink leakage information to obtain the target air pressure of the ink supply mechanism; so that the adsorption force of the air pressure on the ink is more in line with the current printing environment, and the quality of the printed image is ensured.

Description

Technical Field

[0001] This invention relates to the field of industrial inkjet printing technology, and in particular to a method, apparatus, equipment and storage medium for real-time detection of automatic ink supply air pressure in a printhead. Background Technology

[0002] Inkjet printing technology involves a printer controlling the movement of the printhead according to the printing task corresponding to the image to be printed. As the printhead moves, the nozzles of the printhead spray colored liquid ink into tiny particles onto the printing medium to form images or text.

[0003] In existing technology, inkjet printers without ink cartridges use negative pressure to control ink ejection. To prevent ink from flowing freely from the printhead, pressure fluctuations directly affect ink supply. For example, if the pressure is too low, the suction force on the ink is too strong, causing ink to be drawn into the ink tube; if the pressure is too high, the suction force is too weak, allowing ink to flow freely from the printhead nozzles, affecting the final print quality. However, factors such as ink brand, base plate mounting height, and ambient temperature during the production process can lead to unstable negative pressure in the negative pressure system, causing ink to frequently flow arbitrarily from the printhead nozzles, thus affecting print quality. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a method, apparatus, device and storage medium for real-time detection of automatic ink supply pressure of printhead, in order to solve the technical problem of poor print quality caused by the inability of preset negative pressure to suction ink due to differences in inkjet printer equipment and environment.

[0005] The technical solution adopted in this invention is:

[0006] This invention provides a method for real-time detection of automatic ink supply air pressure in a printhead, the method comprising:

[0007] S1: Acquire each ink leakage detection image of the printhead at the first interval;

[0008] S2: Determine the ink leakage information of the printhead based on the image information of each ink leakage detection image;

[0009] S3: Adjust the air pressure of the ink supply mechanism of the printhead according to the ink leakage information to obtain the target air pressure of the ink supply mechanism;

[0010] S1 includes:

[0011] S11: Obtain the print image of the task to be printed at the second interval;

[0012] S12: Determine the first interval time based on the interval information of the abnormal ink dots in the printed image;

[0013] S13: Obtain each of the ink leakage detection images according to the first interval time.

[0014] S13 includes:

[0015] S131: Obtain the first distance between the ink droplet and the printhead and the second distance between the ink droplet and the landing point in each of the ink leakage detection images;

[0016] S132: Filter each of the ink leakage detection images according to the first distance and the second distance, and record the ink leakage detection images that meet the requirements as target detection images;

[0017] The target detection image is either an image of the ink droplet at the moment of its formation in the printhead or an image of the ink droplet at its landing point.

[0018] Preferably, S2 includes:

[0019] S21: Obtain the shooting time information and ink dot information of each of the ink leakage detection images;

[0020] S22: Obtain the ink leakage information based on the ink dot information and the shooting time;

[0021] The ink leakage information includes at least one of the following: ink volume, ink leakage rate, insufficient ink supply, and ink supply delay.

[0022] Preferably, S1 includes:

[0023] S14: Obtain the position information of the printhead relative to the printing medium, wherein the printing medium is a transparent medium used for printhead ink leakage detection;

[0024] S15: When the location information meets the requirements, control the image acquisition mechanism to acquire each of the ink leakage detection images at the first interval time;

[0025] The image acquisition mechanism and the printhead are positioned relative to the printing medium.

[0026] The present invention also provides a method for real-time detection of automatic ink supply air pressure in a printhead, the method comprising:

[0027] S1: Acquire each ink leakage detection image of the printhead at the first interval;

[0028] S2: Determine the ink leakage information of the printhead based on the image information of each ink leakage detection image;

[0029] S3: Adjust the air pressure of the ink supply mechanism of the printhead according to the ink leakage information to obtain the target air pressure of the ink supply mechanism;

[0030] The ink supply mechanism has ink supply delay and / or insufficient ink supply, and S1 includes:

[0031] S133: Acquire test image data;

[0032] S134: Based on the test image data, perform test printing on a printing medium with a reference image, and synchronously acquire each comparison image of the reference image and the test image at the first interval time as the ink leakage detection image;

[0033] Wherein, the first interval time is an integer multiple of the inkjet interval time of the test image data.

[0034] Preferably, the ink supply mechanism has ink supply delay and / or insufficient ink supply, and S2 includes:

[0035] S23: Obtain the first ink dot information of each ink dot belonging to the test image in the comparison image and the second ink dot information of each ink dot in the reference image that corresponds one-to-one with each ink dot;

[0036] S24: Based on the information of each first ink dot and the corresponding information of each second ink dot, obtain the difference information of each ink dot between the test image and the reference image;

[0037] S25 determines ink supply delay and / or insufficient ink supply of the printhead based on the aforementioned difference information.

[0038] Preferably, S1 includes:

[0039] S14: Obtain the position information of the printhead relative to the printing medium, wherein the printing medium is a transparent medium used for printhead ink leakage detection;

[0040] S15: When the location information meets the requirements, control the image acquisition mechanism to acquire each of the ink leakage detection images at the first interval time;

[0041] The image acquisition mechanism and the printhead are positioned relative to the printing medium.

[0042] The present invention also provides a printing apparatus, applied to the real-time detection method for automatic ink supply air pressure of the printhead as described in any of the above claims, comprising:

[0043] Data acquisition module: used to acquire each ink leakage detection image of the printhead ink leakage detection at a first time interval;

[0044] Data processing module: used to determine the ink leakage information of the printhead based on the image information of each ink leakage detection image;

[0045] Data analysis module: used to adjust the air pressure of the ink supply mechanism of the printhead according to the ink leakage information, and obtain the target air pressure of the ink supply mechanism.

[0046] The present invention also provides a printing apparatus, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, wherein the computer program instructions, when executed by the processor, implement the method described in any of the preceding embodiments.

[0047] The present invention also provides a storage medium having stored thereon computer program instructions that, when executed by a processor, implement the method described in any of the preceding claims.

[0048] In summary, the beneficial effects of the present invention are as follows:

[0049] This invention provides a method, apparatus, device, and storage medium for real-time detection of automatic ink supply air pressure in printheads. It acquires ink leakage detection images at preset first intervals, determines ink leakage information based on the image information of each image (e.g., insufficient ink volume, automatic ink leakage, ink supply delay), and adjusts the air pressure of the ink supply mechanism according to the specific ink leakage information. This ensures that the air pressure's adsorption force on the ink better matches the current printing environment, guaranteeing the quality of the printed image. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of the present invention.

[0051] Figure 1 This is a flowchart illustrating the real-time detection method for automatic ink supply air pressure of the printhead in Embodiment 1 of the present invention.

[0052] Figure 2 This is a schematic diagram of the ink leakage detection platform in Embodiment 1 of the present invention;

[0053] Figure 3 This is a schematic diagram of the process for obtaining the ink leakage detection image in Embodiment 1 of the present invention;

[0054] Figure 4 This is a schematic diagram of the process for obtaining ink leakage information in Embodiment 1 of the present invention;

[0055] Figure 5 This is a flowchart illustrating the ink supply anomaly in Embodiment 1 of the present invention;

[0056] Figure 6 This is a schematic diagram of the process of acquiring ink leakage detection images through an ink leakage detection platform in Embodiment 1 of the present invention;

[0057] Figure 7 This is a schematic diagram of the printing device in Embodiment 2 of the present invention;

[0058] Figure 8 This is a schematic diagram of the printing device in Embodiment 3 of the present invention;

[0059] Figures 1 to 8 The accompanying diagram description is as follows:

[0060] 1. Box body; 2. Transparent medium; 3. Lifting mechanism; 4. Cleaning mechanism; 5. Image acquisition mechanism. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, the element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Where there is no conflict, embodiments of the present invention and the various features thereof can be combined with each other, all of which are within the scope of protection of the present invention.

[0062] Example 1

[0063] Please see Figure 1 , Figure 1 This is a flowchart illustrating a real-time detection method for automatic ink supply air pressure of a printhead according to Embodiment 1 of the present invention. The method includes:

[0064] S1: Acquire each ink leakage detection image of the printhead at the first interval;

[0065] Specifically, the printhead is moved to the position of the ink leakage detection mechanism, and the image capturing mechanism of the ink leakage detection mechanism is controlled to acquire the corresponding detection image. The detection image includes at least one of the following: an image of ink accumulation at the nozzle of the printhead, or an image of ink dots on the detection plate of the detection mechanism.

[0066] In one embodiment, please refer to Figure 2 , Figure 2 This is a testing platform for printhead ink leakage detection. The platform includes a housing 1 and a cover consisting of a transparent medium 2 (glass). Inside the housing 1 is an image acquisition mechanism 5 (a CCD camera), a lifting mechanism 3, and a cleaning mechanism 4. The lifting mechanism 3 adjusts the relative height between the printhead and the testing platform. During printhead ink leakage detection, the printhead is moved above the testing platform. The CCD camera acquires an image on the transparent medium 2 or an image of accumulated ink on the printhead nozzle through the transparent medium. The cleaning mechanism 4 cleans the transparent medium 2 after each printhead ink leakage detection, when the printhead leaves the detection area. The ink on material 2 is cleaned for the next test. It should be noted that a reference image is also provided for use with this test platform. This reference image is transparent or semi-transparent. When the ink dots of the reference image and the ink dots sprayed by the nozzle onto the glass overlap in the vertical direction, the overlapping area in the image captured by the CCD camera will be deepened. Furthermore, this reference image can also be a projection image, that is, the ink dots of the reference image are projected onto the transparent medium, and at the same time, the ink dots of the nozzle leakage test also form a test image on the transparent medium. Therefore, when there is a reference image, the image obtained by the CCD camera is the comparison image described below.

[0067] S2: Determine the ink leakage information of the printhead based on the image information of each ink leakage detection image;

[0068] Specifically, the captured ink leakage detection images are analyzed to determine ink leakage information by examining the ink accumulation in the printhead nozzles and / or the number and size of ink dots on the detection board. This information includes ink flow rate and ink volume. Ink leakage information also includes insufficient or delayed ink supply. This can be determined by controlling the printhead to spray ink according to a preset time and checking the ink dot information on the detection board or the ink accumulation information in the printhead nozzles to determine if excessive negative pressure in the ink supply mechanism is causing insufficient or delayed ink supply.

[0069] S3: Adjust the air pressure of the ink supply mechanism of the printhead according to the ink leakage information to obtain the target air pressure of the ink supply mechanism.

[0070] Specifically, the air pressure of the ink supply mechanism is adjusted based on the ink leakage information. Specifically, the negative air pressure is adjusted to make the suction force of the negative air pressure on the ink more reasonable, to prevent ink from flowing out automatically, insufficient ink supply, or ink supply delay, and to ensure the quality of printed images.

[0071] The automatic ink supply air pressure real-time detection method for printheads provided by this invention acquires each ink leakage detection image at a preset first interval. Based on the image information of each ink leakage detection image, ink leakage information is determined, such as insufficient ink volume, automatic ink outflow, ink supply delay, etc. The air pressure of the ink supply mechanism is adjusted according to the specific ink leakage information, so that the air pressure adsorption force on the ink is more in line with the current printing environment, thus ensuring the quality of the printed image.

[0072] In one embodiment, please refer to Figure 3 S1 includes:

[0073] S11: Obtain the print image of the task to be printed at the second interval;

[0074] S12: Determine the first interval time based on the interval information of the abnormal ink dots in the printed image;

[0075] S13: Obtain each of the ink leakage detection images according to the first interval time.

[0076] Specifically, the printing equipment performs inkjet printing on the printing medium based on the image dot matrix data and printing parameters of the task to be printed. During the printing process, the image acquisition device acquires the printed images at a second interval. The printed images are analyzed to determine whether there are excess ink dots, missing ink dots, or ink dot areas that do not meet the requirements. The first interval is determined based on the interval information of these abnormal dots, that is, the frequency of CCD camera image acquisition during printhead ink leakage detection is reasonably set to avoid a large number of useless images during printhead ink leakage detection. This is because during ink leakage detection, the effective images are the images corresponding to the moment when the ink droplet falls from the nozzle position of the printhead and the moment when it falls into the printing medium, as well as the final number of ink dots on the printing medium.

[0077] In one embodiment, S13 includes:

[0078] S131: Obtain the first distance between the ink droplet and the printhead and the second distance between the ink droplet and the landing point in each of the ink leakage detection images;

[0079] S132: Filter each of the ink leakage detection images according to the first distance and the second distance, and record the ink leakage detection images that meet the requirements as target detection images;

[0080] The target detection image is either an image of the ink droplet at the moment of its formation in the printhead or an image of the ink droplet at its landing point.

[0081] Specifically, images within a first distance between the ink droplet and the printhead and images within a second distance between the ink droplet and the transparent medium are set as valid images. The ink leakage detection images are filtered by the first and second distances to obtain target detection images for ink leakage analysis.

[0082] In one embodiment, please refer to Figure 4 S2 includes:

[0083] S21: Obtain the shooting time information and ink dot information of each of the ink leakage detection images;

[0084] S22: Obtain the ink leakage information based on the ink dot information and the shooting time;

[0085] The ink leakage information includes at least one of the following: ink volume, ink leakage rate, insufficient ink supply, and ink supply delay.

[0086] Specifically, the capture time of each ink leakage detection image and the position information of each ink dot in the image are obtained, as well as the size information of the ink dot in the image corresponding to the location of the ink dot on the printing medium. The ink flow rate can be obtained based on the position information and the corresponding time information, and the ink volume of the ink dot can be obtained based on the size information of the ink dot. It should be noted that the ink volume of the ink dot can be determined by looking up a table, that is, the ink volume corresponding to the area of ​​various ink dots is statistically analyzed in advance, and a table of the relationship between ink volume and imaging area is established.

[0087] It should be noted that: when the printed image indicates that the printhead has an automatic ink leakage phenomenon, the ink leakage detection image is the image of the automatically leaking ink. If the printed image indicates that the printhead has insufficient ink supply or ink supply delay, a test print needs to be performed under the current pressure. During the test print, there is a corresponding reference image. The printhead sprays ink at the ink dot position corresponding to the reference image based on the test image data, thereby obtaining the test image. At this time, the ink leakage detection image is a comparison image that corresponds to both the test image and the reference image.

[0088] In one embodiment, the ink supply mechanism suffers from ink supply delay and / or insufficient ink supply, and S1 includes:

[0089] S133: Acquire test image data;

[0090] S134: Based on the test image data, perform test printing on a printing medium with a reference image, and synchronously acquire each comparison image of the reference image and the test image at the first interval time as the ink leakage detection image;

[0091] Wherein, the first interval time is an integer multiple of the inkjet interval time of the test image data.

[0092] Specifically, if the reference image is a physical object, it is mounted on a transparent medium and positioned on the side where the CCD camera is located. If the reference image is a projection image, it is projected onto the transparent medium. Then, the printhead prints on the transparent medium based on the test image data. The dot matrix data of the test image data corresponds one-to-one with the ink dot positions of the reference image, and the theoretical imaging size of each ink dot in the test image data is the same as the size of each ink dot in the reference image. The color of each ink dot in the test image data is different from the color of each ink dot in the reference image. The CCD camera acquires a comparison image containing the reference image and the test image at a first time interval.

[0093] In one embodiment, please refer to Figure 5 The ink supply mechanism suffers from ink supply delay and / or insufficient ink supply, and step S2 includes:

[0094] S23: Obtain the first ink dot information of each ink dot belonging to the test image in the comparison image and the second ink dot information of each ink dot in the reference image that corresponds one-to-one with each ink dot;

[0095] S24: Based on the information of each first ink dot and the corresponding information of each second ink dot, obtain the difference information of each ink dot between the test image and the reference image;

[0096] S25 determines ink supply delay and / or insufficient ink supply of the printhead based on the aforementioned difference information.

[0097] Specifically, each ink dot in the test image is compared with the corresponding ink dots in the reference image to obtain the difference information of each ink dot. The difference information includes the difference in the imaging position and the difference in imaging size of the ink dots. The pressure value of the ink supply mechanism is adjusted based on the difference information. Specifically, the average value of the difference information can be used as the adjustment standard.

[0098] In one embodiment, please refer to Figure 6 S1 includes:

[0099] S14: Obtain the position information of the printhead relative to the printing medium, wherein the printing medium is a transparent medium used for printhead ink leakage detection;

[0100] S15: When the location information meets the requirements, control the image acquisition mechanism to acquire each of the ink leakage detection images at the first interval time;

[0101] The image acquisition mechanism and the printhead are positioned relative to the printing medium.

[0102] In one embodiment, the process further includes the following after S3:

[0103] S4: Adjust the printing parameters of the task to be printed according to the target air pressure to obtain the target parameters;

[0104] S5: Continue printing the unprinted image data according to the target parameters;

[0105] S6: Repeat S1 to S5 until the target image of the task to be printed is obtained.

[0106] Specifically, since controlling the ink volume and ink ejection timing through pressure suction of the ink is affected by the printer's working environment and installation height, it is unavoidable that issues such as automatic ink leakage, inappropriate ink droplet size, and ink supply delays may occur. This application performs ink leakage detection on the printhead in real time during the printing process based on the presence of such abnormal images in the printed image, and adjusts the air pressure of the ink supply mechanism to ensure the quality of the printed image.

[0107] The printhead automatic ink supply air pressure real-time detection method provided in Embodiment 1 of the present invention acquires each ink leakage detection image of the printhead at a preset first interval time, determines the ink leakage information based on the image information of each ink leakage detection image, such as insufficient ink volume, automatic ink outflow, ink supply delay, etc., and adjusts the air pressure of the ink supply mechanism according to the specific ink leakage information so that the air pressure adsorption force on the ink is more in line with the current printing environment, thereby ensuring the quality of the printed image.

[0108] Example 2

[0109] Embodiment 2 of the present invention provides a printing device, please refer to... Figure 7 ,include:

[0110] Data acquisition module: used to acquire each ink leakage detection image of the printhead ink leakage detection at a first time interval;

[0111] Data processing module: used to determine the ink leakage information of the printhead based on the image information of each ink leakage detection image;

[0112] Data analysis module: used to adjust the air pressure of the ink supply mechanism of the printhead according to the ink leakage information, and obtain the target air pressure of the ink supply mechanism.

[0113] The printing device provided in Embodiment 2 of the present invention acquires each ink leakage detection image of the printhead at a preset first interval time, determines ink leakage information based on the image information of each ink leakage detection image, such as insufficient ink volume, automatic ink leakage, ink supply delay, etc., and adjusts the air pressure of the ink supply mechanism for specific ink leakage information so that the air pressure adsorption force on the ink is more in line with the current printing environment, thereby ensuring the quality of the printed image.

[0114] In one embodiment, the data acquisition module includes:

[0115] Image acquisition unit: Acquires the print image of the task to be printed at the second time interval;

[0116] Time acquisition unit: Determines the first interval time based on the interval information of abnormal ink spots in the printed image;

[0117] Test image unit: acquire each of the ink leakage detection images according to the first interval time.

[0118] Preferably, the test image unit includes:

[0119] Ink droplet position unit: acquires the first distance between the ink droplet and the nozzle and the second distance between the ink droplet and the landing point in each of the ink leakage detection images;

[0120] Target image unit: The ink leakage detection images are filtered according to the first distance and the second distance, and the ink leakage detection images that meet the requirements are recorded as target detection images;

[0121] The target detection image is either an image of the ink droplet at the moment of its formation in the printhead or an image of the ink droplet at its landing point.

[0122] Preferably, the data processing module includes:

[0123] Information acquisition unit: acquires the shooting time information and ink dot information of each of the ink leakage detection images;

[0124] Ink leakage information unit: The ink leakage information is obtained based on the ink dot information and the shooting time.

[0125] The ink leakage information includes at least one of the following: ink volume, ink leakage rate, insufficient ink supply, and ink supply delay.

[0126] Preferably, the ink supply mechanism has ink supply delay and / or insufficient ink supply, and the test image unit includes;

[0127] Image data acquisition unit: Acquires test image data;

[0128] Comparison image acquisition unit: Based on the test image data, performs test printing on a printing medium with a reference image, and synchronously acquires each comparison image of the reference image and the test image at the first interval time as the ink leakage detection image;

[0129] Wherein, the first interval time is an integer multiple of the inkjet interval time of the test image data.

[0130] In one embodiment, the ink supply mechanism suffers from ink supply delay and / or insufficient ink supply, and the data processing module includes:

[0131] Ink dot information unit: acquires the first ink dot information of each ink dot belonging to the test image in the comparison image and the second ink dot information of each ink dot in the reference image that corresponds one-to-one with each ink dot;

[0132] Ink dot difference unit: Based on the information of each first ink dot and the corresponding information of each second ink dot, the difference information of each ink dot between the test image and the reference image is obtained;

[0133] Difference information unit: Based on the difference information provided, determine the ink supply delay and / or insufficient ink supply of the printhead.

[0134] Preferably, the data acquisition module includes:

[0135] Position acquisition unit: acquires the position information of the printhead relative to the printing medium, wherein the printing medium is a transparent medium used for printhead ink leakage detection;

[0136] Image capturing unit: When the location information meets the requirements, it controls the image acquisition mechanism to acquire each of the ink leakage detection images at the first interval time;

[0137] The image acquisition mechanism and the printhead are positioned relative to the printing medium.

[0138] The printing device provided in Embodiment 2 of the present invention acquires each ink leakage detection image of the printhead at a preset first interval time, determines ink leakage information based on the image information of each ink leakage detection image, such as insufficient ink volume, automatic ink leakage, ink supply delay, etc., and adjusts the air pressure of the ink supply mechanism for specific ink leakage information so that the air pressure adsorption force on the ink is more in line with the current printing environment, thereby ensuring the quality of the printed image.

[0139] Example 3

[0140] Embodiment 3 of the present invention discloses a printing device, please refer to... Figure 8 It includes at least one processor, at least one memory, and computer program instructions stored in the memory.

[0141] Specifically, the processor may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement embodiments of the present invention.

[0142] The memory may include a large-capacity storage device for data or instructions. For example, and not limitingly, the memory may include a hard disk drive (HDD), a floppy disk drive, flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory may include removable or non-removable (or fixed) media. Where appropriate, the memory may be internal or external to a data processing device. In a particular embodiment, the memory is a non-volatile solid-state memory. In a particular embodiment, the memory includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0143] The processor reads and executes computer program instructions stored in the memory to implement any of the printhead automatic ink supply air pressure real-time detection methods in Embodiment 1 above.

[0144] In one example, the printing device may also include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus and communicate with each other.

[0145] The communication interface is mainly used to enable communication between various modules, devices, units and / or equipment in the embodiments of the present invention.

[0146] A bus, including hardware, software, or both, couples components of a printing device together. For example, and not limitingly, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, a bus may include one or more buses. While specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.

[0147] In summary, the real-time detection method, apparatus, device, and storage medium for automatic ink supply air pressure of the printhead provided in this embodiment of the invention acquires each ink leakage detection image at a preset first interval, determines ink leakage information based on the image information of each ink leakage detection image, such as insufficient ink volume, automatic ink outflow, ink supply delay, etc., and adjusts the air pressure of the ink supply mechanism according to the specific ink leakage information, so that the air pressure adsorption force on the ink is more in line with the current printing environment, thus ensuring the quality of the printed image.

[0148] It should be clarified that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of the present invention.

[0149] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this invention are programs or code segments used to perform the required tasks. The programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media 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, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for real-time detection of automatic ink supply air pressure in a printhead, characterized in that, The method includes: S1: Acquire each ink leakage detection image of the printhead at the first interval; S2: Determine the ink leakage information of the printhead based on the image information of each ink leakage detection image; S3: Adjust the air pressure of the ink supply mechanism of the printhead according to the ink leakage information to obtain the target air pressure of the ink supply mechanism; S1 includes: S11: Obtain the print image of the task to be printed at the second interval; S12: Determine the first interval time based on the interval information of the abnormal ink dots in the printed image; S13: Obtain each of the ink leakage detection images according to the first time interval; S13 includes: S131: Obtain the first distance between the ink droplet and the printhead and the second distance between the ink droplet and the landing point in each of the ink leakage detection images; S132: Filter each of the ink leakage detection images according to the first distance and the second distance, and record the ink leakage detection images that meet the requirements as target detection images; The target detection image is either an image of the ink droplet at the moment of its formation in the printhead or an image of the ink droplet at its landing point.

2. The method for real-time detection of automatic ink supply air pressure in a printhead according to claim 1, characterized in that, S2 includes: S21: Obtain the shooting time information and ink dot information of each of the ink leakage detection images; S22: Obtain the ink leakage information based on the ink dot information and the shooting time; The ink leakage information includes at least one of the following: ink volume, ink leakage rate, insufficient ink supply, and ink supply delay.

3. A method for real-time detection of automatic ink supply air pressure in a printhead, characterized in that, The method includes: S1: Acquire each ink leakage detection image of the printhead at the first interval; S2: Determine the ink leakage information of the printhead based on the image information of each ink leakage detection image; S3: Adjust the air pressure of the ink supply mechanism of the printhead according to the ink leakage information to obtain the target air pressure of the ink supply mechanism; The ink supply mechanism suffers from ink supply delay and / or insufficient ink supply, and S1 includes: S133: Acquire test image data; S134: Based on the test image data, perform test printing on a printing medium with a reference image, and synchronously acquire each comparison image of the reference image and the test image at the first interval time as the ink leakage detection image; Wherein, the first interval time is an integer multiple of the inkjet interval time of the test image data.

4. The method for real-time detection of automatic ink supply air pressure in a printhead according to claim 3, characterized in that, The ink supply mechanism suffers from ink supply delay and / or insufficient ink supply, and S2 includes: S23: Obtain the first ink dot information of each ink dot belonging to the test image in the comparison image and the second ink dot information of each ink dot in the reference image that corresponds one-to-one with each ink dot; S24: Based on the information of each first ink dot and the corresponding information of each second ink dot, obtain the difference information of each ink dot between the test image and the reference image; S25 determines ink supply delay and / or insufficient ink supply of the printhead based on the aforementioned difference information.

5. The method for real-time detection of automatic ink supply air pressure of a printhead according to any one of claims 1 to 4, characterized in that, S1 includes: S14: Obtain the position information of the printhead relative to the printing medium, wherein the printing medium is a transparent medium used for printhead ink leakage detection; S15: When the location information meets the requirements, control the image acquisition mechanism to acquire each of the ink leakage detection images at the first interval time; The image acquisition mechanism and the printhead are positioned relative to the printing medium.

6. A printing apparatus, characterized in that, The method for real-time detection of automatic ink supply air pressure in a printhead as described in claim 1 or claim 3 includes: Data acquisition module: used to acquire each ink leakage detection image of the printhead ink leakage detection at a first time interval; Data processing module: used to determine the ink leakage information of the printhead based on the image information of each ink leakage detection image; Data analysis module: used to adjust the air pressure of the ink supply mechanism of the printhead according to the ink leakage information, and obtain the target air pressure of the ink supply mechanism.

7. A printing device, characterized in that, include: 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 as described in any one of claims 1-5.

8. A storage medium storing computer program instructions thereon, characterized in that, When the computer program instructions are executed by a processor, the method as described in any one of claims 1-5 is implemented.

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