Jet printing height adjusting method and device, UV jet printing equipment and storage medium

Abstract

The embodiment of the invention provides a jet printing height adjusting method and device, UV jet printing equipment and a storage medium, and the method comprises the steps: carrying out the thickness measurement of a to-be-jet-printed medium through a laser device, so as to obtain a minimum voltage value when the laser device measures the thickness of the to-be-jet-printed medium; performing thickness conversion processing on the minimum voltage value according to a pre-constructed calibration database to obtain the thickness of the to-be-jet-printed medium; according to the thickness, the descending stroke of the Z axis of a jet printing trolley of the UV jet printing equipment is calculated, and the required descending stroke of the Z axis is obtained; and performing descending adjustment on the Z axis according to the required descending stroke so as to adjust the jet printing height of the to-be-jet-printed medium. According to the embodiment of the invention, the precision of jet printing height adjustment can be improved, so that the jet printing precision and quality are ensured, and the safety risk is reduced.

Description

Technical Field

[0001] The present invention relates to the field of printing technology, and in particular, to a method and device for adjusting the printing height, a UV printing device, and a storage medium. Background Art

[0002] The high efficiency, high precision, fast curing, and versatility of UV printing devices (such as being able to support various media to be printed with different materials, various inks, etc.) make them the preferred devices in the modern printing industry.

[0003] In related technologies, a height measuring instrument is usually installed on the printing carriage of a UV printing device, and the height between the nozzle carried by the printing carriage and the medium to be printed is automatically measured by the height measuring instrument to adjust the printing height of the nozzle with respect to the medium to be printed, ensuring the smooth progress of the printing operation.

[0004] However, this method can only measure the height of a single point on the surface of the medium to be printed, and cannot comprehensively detect the overall situation of the surface of the medium to be printed. Especially for media to be printed with poor workmanship such as uneven surfaces or local warping, there may be measurement errors, resulting in collisions between the nozzle and the surface of the medium to be printed, which not only affects the printing accuracy and quality of the medium to be printed, but also increases the safety risk of damaging the nozzle or the medium to be printed.

[0005] Therefore, how to improve the accuracy of printing height adjustment to ensure printing accuracy and quality and reduce safety risks has become an urgent technical problem to be solved. Summary of the Invention

[0006] The main purpose of the embodiments of the present invention is to propose a method and device for adjusting the printing height, a UV printing device, and a storage medium, aiming to improve the accuracy of printing height adjustment to ensure printing accuracy and quality and reduce safety risks.

[0007] To achieve the above object, in the first aspect of the embodiments of the present invention, a method for adjusting the printing height is proposed. The method is applied to a UV printing device, and the method includes: Measuring the thickness of the medium to be printed by a laser laser to obtain the lowest voltage value when the laser laser measures the thickness of the medium to be printed; Performing thickness conversion processing on the lowest voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be printed; Calculating the descending stroke of the Z-axis of the printing carriage of the UV printing device according to the thickness to obtain the required descending stroke of the Z-axis; Performing a descending adjustment on the Z-axis according to the required descending stroke to adjust the printing height with respect to the medium to be printed.

[0008] To achieve the above object, a second aspect of the embodiments of the present invention provides a printing height adjustment device, which comprises: A measurement module, configured to measure the thickness of a medium to be printed by a laser, so as to obtain the lowest voltage value when the laser measures the thickness of the medium to be printed; A conversion module, configured to perform thickness conversion processing on the lowest voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be printed; A calculation module, configured to calculate the descending stroke of the Z-axis of the printing carriage of the UV printing device according to the thickness to obtain the required descending stroke of the Z-axis; An adjustment module, configured to perform a descending adjustment on the Z-axis according to the required descending stroke to adjust the printing height of the medium to be printed.

[0009] To achieve the above object, a third aspect of the embodiments of the present invention provides a UV printing device, which comprises a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the method described in the first aspect above is implemented.

[0010] To achieve the above object, a fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the method described in the first aspect above is implemented.

[0011] In the solution implemented by the printing height adjustment method, device, UV printing equipment and storage medium proposed by the present invention, the thickness of the medium to be printed is measured by a laser, so as to obtain the lowest voltage value when the laser measures the thickness of the medium to be printed; the thickness conversion process is carried out on the lowest voltage value according to the pre-constructed calibration database to obtain the thickness of the medium to be printed; according to the thickness, the descending stroke of the Z-axis of the printing carriage of the UV printing equipment is calculated to obtain the required descending stroke of the Z-axis; the Z-axis is adjusted to descend according to the required descending stroke, so as to adjust the printing height of the medium to be printed. In the present invention, on the one hand, by obtaining the lowest voltage value when the laser measures the thickness of the medium to be printed in a non-contact manner, the measurement error can be reduced, providing a reliable index for obtaining the thickness of the medium to be printed; on the other hand, through the pre-constructed calibration database, the thickness conversion process of the lowest voltage value can be quickly carried out, improving the accuracy of the thickness of the medium to be printed; on the other hand, by calculating the required descending stroke of the Z-axis of the printing carriage of the UV printing equipment according to the thickness of the printing medium, reliable data support is provided for adjusting the Z-axis, so that the Z-axis can be automatically, reasonably and accurately adjusted to descend according to the required descending stroke, ensuring an appropriate distance between the print head and the medium to be printed, realizing accurate printing height adjustment, thereby improving the accuracy, simplicity and automation of the printing height adjustment, avoiding too high or too low printing height during the printing process, avoiding collision between the nozzle and the surface of the medium to be printed, and further ensuring the printing accuracy and quality and reducing the safety risk. Description of the Drawings

[0012] Figure 1 is a schematic flowchart of a printing height adjustment method in an embodiment of the present invention; Figure 2 is another schematic flowchart of a printing height adjustment method in an embodiment of the present invention; Figure 3 is Figure 1 a schematic flowchart of a specific implementation manner of step S102 in Figure 4 is a schematic block diagram of a printing height adjustment device provided by an embodiment of the present invention; Figure 5 is a schematic structural block diagram of a UV printing equipment provided by an embodiment of the present invention. Detailed Description of the Invention

[0013] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] It should be noted that although the functional modules are divided in the schematic diagram of the device and the logical sequence is shown in the flowchart, in some cases, the steps shown or described may be executed in a different module division from that in the device or a different sequence from that in the flowchart. Terms such as "first" and "second" in the specification, claims, and the above-mentioned drawings are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein are only for the purpose of describing the embodiments of the present invention and are not intended to limit the present invention.

[0016] In the related art, the process of automatic height measurement by an altimeter is generally as follows: an altimeter is installed on the inkjet carriage, the medium to be inkjet-printed is placed on the printing table of the UV inkjet printing device, the printing table or the inkjet carriage is moved to ensure that the medium to be inkjet-printed is located at the bottom of the altimeter. At this time, the height measurement caliper of the altimeter pops out. After the height measurement caliper touches the surface of the medium to be inkjet-printed, it stops, and height measurement is carried out. Finally, the printing height of the print head for the medium to be inkjet-printed is adjusted according to the height measurement result. This height measurement method can only measure the height of a single point on the medium to be inkjet-printed and cannot cover the entire surface of the medium to be inkjet-printed. If there are local warping or unevenness on the surface of the medium to be inkjet-printed, it may lead to measurement errors, affect the printing accuracy and quality, and even may bring safety risks of damaging the equipment or the medium to be inkjet-printed.

[0017] To solve the above problems, a method and device for adjusting the spraying height, a UV spraying device and a storage medium are provided. In the embodiments of the present invention, a laser is used to measure the thickness of the medium to be sprayed, so as to obtain the lowest voltage value when the laser measures the thickness of the medium to be sprayed; the lowest voltage value is processed by a pre-constructed calibration database for thickness conversion to obtain the thickness of the medium to be sprayed; according to the thickness, the downward stroke of the Z-axis of the spraying carriage of the UV spraying device is calculated to obtain the required downward stroke of the Z-axis; the Z-axis is adjusted downward according to the required downward stroke to adjust the spraying height of the medium to be sprayed. In this way, on the one hand, by obtaining the lowest voltage value when the laser measures the thickness of the medium to be sprayed in a non-contact manner, the measurement error can be reduced, providing a reliable index for obtaining the thickness of the medium to be sprayed; on the other hand, through the pre-constructed calibration database, the thickness conversion of the lowest voltage value can be quickly processed, improving the accuracy of the thickness of the medium to be sprayed; on the other hand, by calculating the required downward stroke of the Z-axis of the spraying carriage of the UV spraying device according to the thickness of the sprayed medium, reliable data support is provided for adjusting the Z-axis, so that the Z-axis can be automatically, reasonably and accurately adjusted downward according to the required downward stroke, ensuring an appropriate distance between the spray head and the medium to be sprayed, realizing accurate adjustment of the spraying height, thereby improving the accuracy, simplicity and automation of the spraying height adjustment, avoiding too high or too low spraying height during spraying, avoiding collision between the nozzle and the surface of the medium to be sprayed, and thus ensuring the spraying accuracy and quality and reducing safety risks.

[0018] In the embodiments of the present invention, the method for adjusting the spraying height can be applied to a UV spraying device or can be software running in a UV spraying device. The software can be an application for implementing the method for adjusting the spraying height, such as a software for adjusting the spraying height, but is not limited to the above forms.

[0019] First, the nouns involved in the present invention are analyzed: UV spraying device: refers to a digital inkjet printing device that uses ultraviolet (UV) light curing technology. It sprays UV ink on the surface of various materials of the medium to be sprayed and uses ultraviolet lamps or light sources to cure the ink to make it dry quickly, so as to achieve the purpose of printing patterns or images.

[0020] Inkjet printing carriage: Also known as the printhead carriage or printing carriage, it is a component in UV inkjet printing equipment responsible for moving the printhead. It is a key component of the inkjet printing equipment, used to carry and move the printhead to ensure the inkjet coverage area and printing accuracy. The inkjet printing carriage can move back and forth along the horizontal direction on the printing table of the UV inkjet printing equipment, and precisely control the relative height (i.e., the vertical distance) between the printhead and the medium to be inkjet printed through its Z-axis, so as to ensure an appropriate distance between the printhead and the surface of the medium to be inkjet printed, enabling the printhead to accurately and evenly spray ink onto the entire surface of the medium to be inkjet printed, forming a clear and fine pattern or image.

[0021] Z-axis: Refers to the axis in the inkjet printing carriage used to control the vertical distance between the printhead and the medium to be inkjet printed, which can automatically adjust the position of the printhead in the vertical direction. By precisely controlling the Z-axis of the inkjet printing carriage, the printhead can be raised or lowered to cope with the unevenness of different surfaces of the medium to be inkjet printed.

[0022] Medium to be inkjet printed: Such as printed circuit boards (Printed Circuit Board, PCB boards), metals, papers, fabrics, glasses, woods, ceramics, and other materials to be inkjet printed with various different materials.

[0023] Based on this, the following will, in conjunction with the accompanying drawings, elaborate on some embodiments of the present invention in detail. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0024] Please refer to Figure 1 , Figure 1 which is an optional flowchart of the inkjet printing height adjustment method provided by the embodiment of the present invention, Figure 1 and the method in

[0025] S101: Measure the thickness of the medium to be inkjet printed through a laser rangefinder to obtain the lowest voltage value when the laser rangefinder measures the thickness of the medium to be inkjet printed.

[0026] In order to reduce the measurement error and the impact of physical contact on the medium to be inkjet printed, and at the same time to improve the stability and reliability of the measurement, a non-contact thickness measurement of the medium to be inkjet printed is carried out using laser technology, specifically, the thickness of the medium to be inkjet printed can be measured through a laser rangefinder.

[0027] Before step S101 in some embodiments, a laser rangefinder can be deployed at an appropriate position of the UV inkjet printing equipment so that the laser of the laser rangefinder can fully cover the entire medium to be inkjet printed, facilitating high-precision thickness measurement of the medium to be inkjet printed. The UV inkjet printing equipment can communicate with the laser rangefinder through a network.

[0028] Among them, the laser rangefinder can include a laser transmitter and a laser receiver. For example, a pair of laser transmitters and laser receivers can be installed directly in front of the printing table of the UV printing device to ensure that the laser scanning range (also known as the laser measurement area) of the laser rangefinder can fully cover the entire printing table.

[0029] Before step S101 of some embodiments, the installation position of the laser rangefinder relative to the UV printing device can also be calibrated.

[0030] After installing the laser transmitter and the laser receiver, calibrate the installation positions of the laser transmitter and the laser receiver to adjust the physical positions of the laser transmitter and the laser receiver, so that the laser transmitter and the laser receiver are horizontally aligned, ensuring the consistency of the laser emission angle and the reception angle during the entire measurement process, thereby reducing measurement errors and improving measurement accuracy.

[0031] In this way, the medium to be printed can be placed on the printing table of the UV printing device and effectively fixed, and the laser rangefinder is started. After starting the laser rangefinder, the printing table is pushed forward so that the entire printing table passes through the laser scanning range of the laser rangefinder to complete the thickness measurement.

[0032] Since the principle of the laser rangefinder for measuring thickness is that the laser emitted by the laser transmitter irradiates the surface of the medium to be printed, the laser interacts with the medium to be printed and is reflected. By measuring the signal intensity of the laser emitted by the laser transmitter reflected back from the surface of the medium to be printed to the laser receiver, the thickness of the medium to be printed is estimated. Due to the physical properties (such as transparency, density, optical properties, etc.) of the medium to be printed, plus the interference of external environmental factors (such as light, temperature, etc.), it may affect the signal intensity of the reflected light, resulting in inaccurate estimated thickness. When the laser receiver receives the reflected laser, it can also convert it into a voltage signal, so that the lowest voltage value of the laser receiver can accurately reflect the specific relationship between the signal intensity of the reflected light and the thickness of the medium to be printed. Therefore, the lowest voltage value of the laser receiver can be indirectly obtained as an effective index for judging the thickness, which can better reflect the thickness of the medium to be printed.

[0033] In this way, by obtaining the lowest voltage value when the laser rangefinder measures the thickness of the medium to be printed, and then determining the thickness of the medium to be printed through the lowest voltage value, the accuracy of the thickness of the medium to be printed can be improved.

[0034] S102: Perform thickness conversion processing on the lowest voltage value according to the pre-constructed calibration database to obtain the thickness of the medium to be printed.

[0035] In order to accurately convert the lowest voltage value into the thickness of the medium to be printed, the lowest voltage value can be processed for thickness conversion according to a pre-constructed calibration database.

[0036] In some embodiments, referring to Figure 2 , before step S101, it may further include but is not limited to the following steps: S105: Measure the thickness of a standard gauge with a calibrated thickness by a laser laser to obtain the calibrated lowest voltage value when the laser laser measures the thickness of the standard gauge.

[0037] S106: Construct a calibration database according to the calibrated thickness and the calibrated lowest voltage value.

[0038] For steps S105 - S106, a standardized calibration database can be constructed in advance through calibration experiments. Specifically, a set of standard gauges with different calibrated thicknesses are sequentially placed on the printing tabletop of the UV printing device and effectively fixed (such as fixed with tape), and the printing tabletop is pushed forward, so as to measure the thickness of each standard gauge by a laser laser respectively, and record the lowest voltage value of the laser laser receiver when measuring the thickness of each standard gauge (defined as the calibrated lowest voltage value).

[0039] Among them, the standard gauge refers to a physical sample with a known calibrated thickness (that is, an accurate thickness), such as a well-made metal block, plastic block or other material blocks, etc.

[0040] Exemplarily, for example, for a set of 8 standard gauges, the calibrated thicknesses are 2 mm, 3 mm, 4 mm, 5 mm,..., 9 mm respectively. Measure the thickness of these standard gauges by a laser laser respectively, and record the lowest voltage value of the laser laser receiver when measuring the thickness of each standard gauge as the calibrated lowest voltage value, such as: The calibrated lowest voltage value of the 2-mm standard gauge is 2.1V; The calibrated lowest voltage value of the 3-mm standard gauge is 2.5V; The calibrated lowest voltage value of the 4-mm standard gauge is 2.9V; The calibrated lowest voltage value of the 5-mm standard gauge is 3.3V; ... The calibrated lowest voltage value of the 9-mm standard gauge is 4.5V.

[0041] In this way, a mapping relationship between the calibrated thickness and the corresponding calibrated lowest voltage value can be established, for example: When the calibrated thickness is 2 mm, the mapped calibrated lowest voltage value is 2.1V; When the calibrated thickness is 3 mm, the mapped calibrated lowest voltage value is 2.5V; When the calibrated thickness is 4 mm, the mapped calibrated minimum voltage value is 2.9 V; When the calibrated thickness is 5 mm, the mapped calibrated minimum voltage value is 3.3 V; …… When the calibrated thickness is 9 mm, the mapped calibrated minimum voltage value is 4.5 V.

[0042] It can be understood that this mapping relationship is a one-to-one correspondence between the calibrated thickness and the calibrated minimum voltage value.

[0043] In this way, a calibration database (such as covering the calibrated thickness range of 0 - 9 mm) can be constructed through this mapping relationship as an accurate reference basis for thickness conversion.

[0044] It should be noted that the calibration database has good scalability and maintainability, and the mapping relationship between the calibrated thickness and the calibrated minimum voltage value can be newly added regularly and flexibly to ensure that the calibration database covers a wider range of medium thicknesses and can adapt to thickness conversion changes and requirements in a timely manner.

[0045] In some embodiments, please refer to Figure 3 , step S102 may include but is not limited to the following steps: S1021: Compare the minimum voltage value with the calibration database to find whether there is a first calibrated minimum voltage value in the calibration database that is the same as the minimum voltage value.

[0046] S1022: When there is a first calibrated minimum voltage value in the calibration database, based on the mapping relationship between the calibrated thickness and the calibrated minimum voltage value in the calibration database, use the first calibrated thickness mapped by the first calibrated minimum voltage value as the thickness.

[0047] S1023: When there is no first calibrated minimum voltage value in the calibration database, find a second calibrated minimum voltage value less than the minimum voltage value and a third calibrated minimum voltage value greater than the minimum voltage value in the calibration database.

[0048] S1024: Based on the mapping relationship, determine the second calibrated thickness mapped by the second calibrated minimum voltage value and the third calibrated thickness mapped by the third calibrated minimum voltage value.

[0049] S1025: Calculate the thickness of the minimum voltage value according to the second calibrated minimum voltage value, the third calibrated minimum voltage value, the second calibrated thickness, and the third calibrated thickness to obtain the thickness.

[0050] For steps S1021 - S1025, in order to quickly and accurately perform thickness conversion on the minimum voltage value when measuring the thickness of the medium to be spray - printed, the minimum voltage value is compared with the calibration database to check whether there is a first calibrated minimum voltage value that is the same as the minimum voltage value in the calibration database.

[0051] When there is a first calibrated minimum voltage value in the calibration database, based on the mapping relationship between the calibrated thickness and the calibrated minimum voltage value in the calibration database, determine the first calibrated thickness mapped by the first calibrated minimum voltage value, and take the determined first calibrated thickness as the thickness of the medium to be spray - printed.

[0052] When there is no first calibrated minimum voltage value in the calibration database, search in the calibration database for a second calibrated minimum voltage value less than the minimum voltage value and a third calibrated minimum voltage value greater than the minimum voltage value, and, based on the mapping relationship between the calibrated thickness and the calibrated minimum voltage value in the calibration database, determine the second calibrated thickness mapped by the second calibrated minimum voltage value and the third calibrated thickness mapped by the third calibrated minimum voltage value.

[0053] In this way, the thickness of the medium to be spray - printed can be calculated from the minimum voltage value according to the second calibrated minimum voltage value, the third calibrated minimum voltage value, the second calibrated thickness, and the third calibrated thickness.

[0054] In this way, by querying the calibration database, the minimum voltage value can be quickly converted into the thickness of the medium to be spray - printed, which not only simplifies the thickness conversion process, improves the thickness conversion efficiency, but also improves the accuracy of the thickness of the medium to be spray - printed.

[0055] In step S1025 of some embodiments, a preset thickness calculation formula can be obtained , where represents the minimum voltage value, represents the second calibrated minimum voltage value, represents the third calibrated minimum voltage value, represents the second calibrated thickness, represents the third calibrated thickness; substitute the minimum voltage value, the second calibrated minimum voltage value, the third calibrated minimum voltage value, the second calibrated thickness, and the third calibrated thickness into the thickness calculation formula for calculation to obtain the thickness.

[0056] In step S1025, for the case where a first calibrated minimum voltage value that is the same as the minimum voltage value cannot be directly matched in the calibration database, interpolation calculation can be performed based on the preset thickness calculation formula so as to calculate the thickness of the medium to be spray - printed from the minimum voltage value. The thickness calculation formula is as follows:

[0057] Where Represents the thickness of the medium to be spray-printed; Represents the minimum voltage value; Represents the second calibrated minimum voltage value; Represents the third calibrated minimum voltage value; Represents the second calibrated thickness; Represents the third calibrated thickness.

[0058] In this way, even if the minimum voltage value when measuring the thickness of the medium to be spray-printed fails to match a consistent calibrated minimum voltage value in the calibration database, the thickness of the medium to be spray-printed can be calculated more precisely based on the calibration database, improving the reliability of the thickness of the medium to be spray-printed.

[0059] In S1021 of some embodiments, after comparing the minimum voltage value with the calibration database, it may further include: when the minimum voltage value is less than the minimum calibrated minimum voltage value in the calibration database or greater than the maximum calibrated minimum voltage value in the calibration database, sending a prompt message indicating an out-of-measurement range.

[0060] For the case where the minimum voltage value when measuring the thickness of the medium to be spray-printed is not within the range of the calibrated minimum voltage values included in the calibration database, a prompt message indicating an out-of-measurement range can be sent to remind relevant spray-printing operators to take corresponding measures, such as: Checking the condition of the medium to be spray-printed: Confirming whether the medium to be spray-printed meets the requirements of the UV spray-printing equipment, such as whether there are obvious dirt or deformations, etc. If so, it is necessary to clean or re-prepare the medium to be spray-printed; Checking the working status of the laser: Confirming whether the laser is working properly, whether there are faults or calibration problems, such as whether the power of the laser emitter is stable and whether the laser is correctly focused, etc. If so, it is necessary to maintain the laser; Checking the cooperation condition between the UV spray-printing equipment and the laser: Such as whether there are abnormalities on the spray-printing table, etc. If so, maintaining the spray-printing table.

[0061] In this way, in order to re-execute step S101 to ensure the smooth completion of the spray-printing operation on the medium to be spray-printed.

[0062] S103: Calculate the downward travel of the Z-axis of the spray-printing carriage of the UV spray-printing equipment according to the thickness to obtain the required downward travel of the Z-axis; After obtaining the thickness of the medium to be spray-printed, calculate the downward travel of the Z-axis of the spray-printing carriage according to the thickness of the medium to be spray-printed to obtain the required downward travel of the Z-axis, so as to provide a reliable basis for automatically and precisely adjusting the Z-axis.

[0063] In step S103 of some embodiments, a preset stroke calculation formula can be obtained , where represents the required descent stroke, represents the preset maximum descent stroke of the Z-axis, represents the thickness, represents the preset safety height; substituting the thickness into the stroke calculation formula for calculation, the required descent stroke is obtained.

[0064] In step S103, based on the thickness of the medium to be printed, the required descent stroke of the Z-axis can be calculated through a preset stroke calculation formula. The stroke calculation formula is as follows:

[0065] where represents the required descent stroke; represents the preset maximum descent stroke of the Z-axis, which can be a constant value determined based on the physical structure of the printing carriage; represents the thickness of the medium to be printed; represents the preset safety height, which is a fixed safety height to avoid the nozzle colliding with the surface of the medium to be printed, such as a value of 1 mm.

[0066] In this way, the required descent stroke of the Z-axis of the printing carriage is calculated based on the thickness of the medium to be printed, so as to automatically adjust the Z-axis based on the required descent stroke, thereby realizing precise adjustment of the printing height.

[0067] S104: Perform a descent adjustment on the Z-axis according to the required descent stroke to adjust the printing height of the medium to be printed.

[0068] Finally, based on the calculated required descent stroke, the Z-axis of the printing carriage is automatically lowered to ensure an appropriate distance is maintained between the nozzle and the surface of the medium to be printed, realizing automatic adaptation and precise adjustment of the printing height.

[0069] It can be seen that in the above solution, through non-contact automated thickness measurement, thickness conversion processing, required descent stroke calculation, and automatic adjustment of the Z-axis, it is possible to ensure an appropriate distance is maintained between the nozzle and the medium to be printed, thereby avoiding too high or too low printing heights during the printing process, ensuring precise control of the printing height in the printing operation, improving the printing quality and efficiency, and thus improving the printing effect, which is applicable to application fields requiring high-precision printing, such as: Advertising industry: For example, high-quality printing on outdoor billboards, signs, display boards, etc.

[0070] Industrial product identification: printing clear patterns, barcodes, QR codes, etc. on products such as plastics, metals, glasses, woods, etc.

[0071] Personalized customization: customizing delicate phone cases, home decorations, souvenirs, etc.

[0072] Packaging industry: used for beautifying printing of various packaging materials, especially for small-batch and customized packaging.

[0073] PCB board inkjet printing: directly printing fine circuit patterns on PCB boards, etc.

[0074] The inkjet printing height adjustment method provided by the above embodiments measures the thickness of the medium to be inkjet printed through a laser, so as to obtain the lowest voltage value when the laser measures the thickness of the medium to be inkjet printed; performs thickness conversion processing on the lowest voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be inkjet printed; calculates the descending stroke of the Z-axis of the inkjet printing carriage of the UV inkjet printing equipment according to the thickness to obtain the required descending stroke of the Z-axis; adjusts the Z-axis to descend according to the required descending stroke to adjust the inkjet printing height of the medium to be inkjet printed. In this way, on the one hand, by obtaining the lowest voltage value when the laser measures the thickness of the medium to be inkjet printed in a non-contact manner, measurement errors can be reduced, providing a reliable index for obtaining the thickness of the medium to be inkjet printed; on the other hand, through the pre-constructed calibration database, quickly performing thickness conversion processing on the lowest voltage value can improve the accuracy of the thickness of the medium to be inkjet printed; on the other hand, by calculating the required descending stroke of the Z-axis of the inkjet printing carriage of the UV inkjet printing equipment from the thickness of the inkjet printing medium, reliable data support is provided for adjusting the Z-axis, so as to automatically, reasonably and accurately adjust the Z-axis to descend according to the required descending stroke, ensure an appropriate distance between the inkjet printing head and the medium to be inkjet printed, and achieve precise inkjet printing height adjustment, thereby improving the accuracy, simplicity and automation degree of inkjet printing height adjustment, being able to avoid too high or too low inkjet printing height during the inkjet printing process to avoid collisions between the nozzle and the surface of the medium to be inkjet printed, and further being able to ensure inkjet printing accuracy and quality and reduce safety risks.

[0075] Please refer to Figure 4 , Figure 4 which is a schematic block diagram of an inkjet printing height adjustment device provided by an embodiment of the present invention. The inkjet printing height adjustment device can be configured in a UV inkjet printing equipment and is used to execute the foregoing inkjet printing height adjustment method.

[0076] As Figure 4 shown, the inkjet printing height adjustment device 400 includes: a measurement module 401, a conversion module 402, a calculation module 403 and an adjustment module 404.

[0077] The measurement module 401 is configured to measure the thickness of the medium to be inkjet-printed by a laser, so as to obtain the lowest voltage value when the laser measures the thickness of the medium to be inkjet-printed; The conversion module 402 is configured to perform thickness conversion processing on the lowest voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be inkjet-printed; The calculation module 403 is configured to calculate the descending stroke of the Z-axis of the inkjet carriage of the UV inkjet device according to the thickness to obtain the required descending stroke of the Z-axis; The adjustment module 404 is configured to perform a descending adjustment on the Z-axis according to the required descending stroke to adjust the inkjet height of the medium to be inkjet-printed.

[0078] In one embodiment, the calculation module 403 is specifically configured to: Obtain a preset stroke calculation formula , where represents the required descending stroke, represents the preset maximum descending stroke of the Z-axis, represents the thickness, represents a preset safety height; Substitute the thickness into the stroke calculation formula for calculation to obtain the required descending stroke.

[0079] In one embodiment, the conversion module 402 is specifically configured to: Compare the lowest voltage value with the calibration database to check whether there is a first calibrated lowest voltage value consistent with the lowest voltage value in the calibration database; When the first calibrated lowest voltage value exists in the calibration database, based on the mapping relationship between the calibrated thickness and the calibrated lowest voltage value in the calibration database, use the first calibrated thickness mapped by the first calibrated lowest voltage value as the thickness; When the first calibrated lowest voltage value does not exist in the calibration database, search in the calibration database for a second calibrated lowest voltage value less than the lowest voltage value and a third calibrated lowest voltage value greater than the lowest voltage value; Based on the mapping relationship, determine the second calibrated thickness mapped by the second calibrated lowest voltage value and the third calibrated thickness mapped by the third calibrated lowest voltage value; Perform thickness calculation on the lowest voltage value according to the second calibrated lowest voltage value, the third calibrated lowest voltage value, the second calibrated thickness, and the third calibrated thickness to obtain the thickness.

[0080] In one embodiment, the conversion module 402 is further configured to: Obtain a preset thickness calculation formula , where represents the lowest voltage value, represents the second calibrated lowest voltage value, represents the third calibrated lowest voltage value, represents the second calibrated thickness, represents the third calibrated thickness; Substitute the lowest voltage value, the second calibrated lowest voltage value, the third calibrated lowest voltage value, the second calibrated thickness, and the third calibrated thickness into the thickness calculation formula for calculation to obtain the thickness.

[0081] In one embodiment, the conversion module 402 is further configured to: When the lowest voltage value is less than the minimum calibrated lowest voltage value in the calibration database or greater than the maximum calibrated lowest voltage value in the calibration database, send a prompt message indicating an out-of-measurement range.

[0082] In one embodiment, the inkjet printing height adjustment device 400 further includes a calibration module for: Measure the thickness of a standard block with a calibrated thickness through the laser laser to obtain the calibrated lowest voltage value when the laser laser measures the thickness of the standard block; Construct the calibration database according to the calibrated thickness and the calibrated lowest voltage value.

[0083] In one embodiment, the inkjet printing height adjustment device 400 further includes a calibration module for: Calibrate the installation position of the laser laser relative to the UV inkjet printing device.

[0084] Among them, each module in the above inkjet printing height adjustment device 400 corresponds to each step in the embodiment of the above inkjet printing height adjustment method, and its functions and implementation processes will not be elaborated here one by one.

[0085] The inkjet printing height adjustment device 400 can execute the inkjet printing height adjustment method provided by the embodiments of the present invention. Therefore, on the one hand, by obtaining the minimum voltage value when the laser measures the thickness of the medium to be inkjet printed in a non-contact manner, measurement errors can be reduced, providing a reliable indicator for obtaining the thickness of the medium to be inkjet printed. On the other hand, through the pre-constructed calibration database, quickly performing thickness conversion processing on the minimum voltage value can improve the accuracy of the thickness of the medium to be inkjet printed. On the other hand, by calculating the required downward stroke of the Z-axis of the inkjet printing carriage of the UV inkjet printing device based on the thickness of the inkjet printing medium, reliable data support is provided for adjusting the Z-axis, so that the Z-axis can be automatically, reasonably, and accurately adjusted downward according to the required downward stroke, ensuring an appropriate distance between the inkjet head and the medium to be inkjet printed, achieving precise inkjet printing height adjustment, thereby improving the accuracy, simplicity, and automation of the inkjet printing height adjustment, being able to avoid too high or too low inkjet printing height during the inkjet printing process to prevent collision between the nozzle and the surface of the medium to be inkjet printed, and further being able to ensure the inkjet printing accuracy and quality and reduce safety risks.

[0086] For the specific limitations of the inkjet printing height adjustment device, reference can be made to the limitations on the inkjet printing height adjustment method in the above text, which will not be elaborated here. Each module in the above inkjet printing height adjustment device can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor of the UV inkjet printing device in hardware form or be independent of it, or can be stored in the memory of the UV inkjet printing device in software form, so as to facilitate the processor to call and execute the operations corresponding to the above modules.

[0087] The methods and devices of the present invention can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multi-processor systems, microprocessor-based systems, set-top boxes, programmable consumer electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present invention can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present invention can also be practiced in a distributed computing environment where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0088] Exemplarily, the above methods and devices can be implemented in the form of a computer program, and this computer program can run on a UV inkjet printing device as shown in Figure 5 the figure.

[0089] Please refer toFigure 5 , Figure 5 It is a schematic block diagram of the structure of a UV inkjet printing device provided by an embodiment of the present invention.

[0090] Please refer to Figure 5 , the UV inkjet printing device includes a processor and a memory connected through a system bus. Among them, the memory may include a non-volatile storage medium and an internal memory.

[0091] The processor is used to provide computing and control capabilities to support the operation of the entire UV inkjet printing device.

[0092] The internal memory provides an environment for the operation of the computer program in the non-volatile storage medium. When the computer program is executed by the processor, the processor can execute any inkjet height adjustment method.

[0093] It should be understood that the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0094] Among them, in one embodiment, the processor is used to run the computer program stored in the memory to implement the following steps: Measure the thickness of the medium to be inkjet printed through a laser, so as to obtain the lowest voltage value when the laser measures the thickness of the medium to be inkjet printed; Perform thickness conversion processing on the lowest voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be inkjet printed; Calculate the downward stroke of the Z-axis of the inkjet carriage of the UV inkjet printing device according to the thickness to obtain the required downward stroke of the Z-axis; Adjust the Z-axis downward according to the required downward stroke to adjust the inkjet height of the medium to be inkjet printed.

[0095] In one embodiment, when the processor implements calculating the downward stroke of the Z-axis of the inkjet carriage of the UV inkjet printing device according to the thickness to obtain the required downward stroke of the Z-axis, it is used to implement: Obtain a preset travel calculation formula , where represents the required descent travel the preset maximum descent travel of the Z-axis represents the thickness represents the preset safety height; Substitute the thickness into the travel calculation formula for calculation to obtain the required descent travel

[0096] In one embodiment, when the processor implements the thickness conversion processing of the lowest voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be printed, it is used to implement: Compare the lowest voltage value with the calibration database to find whether there is a first calibrated lowest voltage value consistent with the lowest voltage value in the calibration database; When the first calibrated lowest voltage value exists in the calibration database, based on the mapping relationship between the calibrated thickness and the calibrated lowest voltage value in the calibration database, use the first calibrated thickness mapped by the first calibrated lowest voltage value as the thickness; When the first calibrated lowest voltage value does not exist in the calibration database, find a second calibrated lowest voltage value less than the lowest voltage value and a third calibrated lowest voltage value greater than the lowest voltage value in the calibration database; Based on the mapping relationship, determine the second calibrated thickness mapped by the second calibrated lowest voltage value and the third calibrated thickness mapped by the third calibrated lowest voltage value; Perform thickness calculation on the lowest voltage value according to the second calibrated lowest voltage value, the third calibrated lowest voltage value, the second calibrated thickness, and the third calibrated thickness to obtain the thickness.

[0097] In one embodiment, when the processor implements the thickness calculation of the lowest voltage value according to the second calibrated lowest voltage value, the third calibrated lowest voltage value, the second calibrated thickness, and the third calibrated thickness to obtain the thickness, it is used to implement: Obtain a preset thickness calculation formula , where represents the lowest voltage value represents the second calibrated lowest voltage value represents the third calibrated lowest voltage value represents the second calibrated thickness represents the third calibrated thickness; Substitute the lowest voltage value, the second calibrated lowest voltage value, the third calibrated lowest voltage value, the second calibrated thickness, and the third calibrated thickness into the thickness calculation formula for calculation to obtain the thickness.

[0098] In one embodiment, after the processor compares the lowest voltage value with the calibration database, it is further configured to: In the case where the lowest voltage value is less than the minimum calibrated lowest voltage value in the calibration database or greater than the maximum calibrated lowest voltage value in the calibration database, a prompt message indicating an out-of-measurement range is issued.

[0099] In one embodiment, before the processor measures the thickness of the to-be-printed medium by using a laser to obtain the lowest voltage value when the laser measures the thickness of the to-be-printed medium, it is further configured to: Measure the thickness of a standard gauge with a calibrated thickness by using the laser to obtain the calibrated lowest voltage value when the laser measures the thickness of the standard gauge; Construct the calibration database according to the calibrated thickness and the calibrated lowest voltage value.

[0100] In one embodiment, before the processor measures the thickness of the to-be-printed medium by using a laser to obtain the lowest voltage value when the laser measures the thickness of the to-be-printed medium, it is further configured to: Calibrate the installation position of the laser relative to the UV printing device.

[0101] This UV printing device can execute the printing height adjustment method provided by the embodiments of the present invention. Therefore, the beneficial effects achievable by the printing height adjustment method provided by the embodiments of the present invention can be realized. For details, refer to the previous embodiments and will not be elaborated herein.

[0102] An embodiment of the present invention further provides a computer-readable storage medium.

[0103] A computer program is stored on the computer-readable storage medium of the present invention. When the computer program is executed by a processor, the steps of the printing height adjustment method as described above are implemented.

[0104] Among them, the computer-readable storage medium may be the internal storage unit of the inkjet printing height adjustment device or the UV inkjet printing device described in the foregoing embodiments, such as the hard disk or memory of the inkjet printing height adjustment device or the UV inkjet printing device. The computer-readable storage medium may also be an external storage device of the inkjet printing height adjustment device or the UV inkjet printing device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital Card (SD Card), a Flash Card, etc. equipped on the inkjet printing height adjustment device or the UV inkjet printing device.

[0105] Since the computer program stored in the computer-readable storage medium can execute any one of the inkjet printing height adjustment methods provided by the embodiments of the present invention, the beneficial effects achievable by any one of the inkjet printing height adjustment methods provided by the embodiments of the present invention can be realized. For details, refer to the foregoing embodiments and will not be elaborated herein.

[0106] Further, the computer-readable storage medium may mainly include a storage program area and a storage data area. Among them, the storage program area may store an operating system, application programs required for at least one function, etc.; the storage data area may store data created according to the use of the blockchain node, etc.

[0107] The blockchain referred to in the present invention is a new application mode of computer technologies such as distributed data storage, peer-to-peer transmission, consensus mechanism, and encryption algorithm. Blockchain, in essence, is a decentralized database, a string of data blocks generated by using cryptographic methods. Each data block contains information about a batch of network transactions, which is used to verify the validity (anti-counterfeiting) of the information and generate the next block. The blockchain may include a blockchain underlying platform, a platform product service layer, an application service layer, etc.

[0108] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or system including that element.

[0109] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A method for adjusting the spraying height, characterized in that, The method is applied to a UV printing device, including: Measuring the thickness of the medium to be printed by a laser to obtain the lowest voltage value when the laser measures the thickness of the medium to be printed; Performing thickness conversion processing on the lowest voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be printed; Calculating the descending stroke of the Z-axis of the printing carriage of the UV printing device according to the thickness to obtain the required descending stroke of the Z-axis; Adjusting the Z-axis to descend according to the required descending stroke to adjust the printing height of the medium to be printed.

2. The method according to claim 1, characterized in that The calculating the descending stroke of the Z-axis of the printing carriage of the UV printing device according to the thickness to obtain the required descending stroke of the Z-axis includes: Obtain a preset travel calculation formula , where represents the required downward travel represents the preset maximum downward travel of the Z-axis represents the thickness represents the preset safety height; Substituting the thickness into the stroke calculation formula for calculation to obtain the required descending stroke.

3. The method according to claim 1, wherein The performing thickness conversion processing on the lowest voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be printed includes: Comparing the lowest voltage value with the calibration database to find whether there is a first calibrated lowest voltage value consistent with the lowest voltage value in the calibration database; When the first calibrated lowest voltage value exists in the calibration database, based on the mapping relationship between the calibrated thickness and the calibrated lowest voltage value in the calibration database, taking the first calibrated thickness mapped by the first calibrated lowest voltage value as the thickness; When the first calibrated lowest voltage value does not exist in the calibration database, searching for a second calibrated lowest voltage value smaller than the lowest voltage value and a third calibrated lowest voltage value larger than the lowest voltage value in the calibration database; Based on the mapping relationship, determining the second calibrated thickness mapped by the second calibrated lowest voltage value and the third calibrated thickness mapped by the third calibrated lowest voltage value; Performing thickness calculation on the lowest voltage value according to the second calibrated lowest voltage value, the third calibrated lowest voltage value, the second calibrated thickness and the third calibrated thickness to obtain the thickness.

4. The method according to claim 3, wherein The performing thickness calculation on the lowest voltage value according to the second calibrated lowest voltage value, the third calibrated lowest voltage value, the second calibrated thickness and the third calibrated thickness to obtain the thickness includes: Obtain the preset thickness calculation formula , where represents the lowest voltage value represents the second calibrated lowest voltage value represents the third calibrated lowest voltage value represents the second calibrated thickness represents the third calibrated thickness; Substituting the lowest voltage value, the second calibrated lowest voltage value, the third calibrated lowest voltage value, the second calibrated thickness and the third calibrated thickness into the thickness calculation formula for calculation to obtain the thickness.

5. The method according to claim 3, wherein After comparing the lowest voltage value with the calibration database, it further includes: When the lowest voltage value is less than the minimum calibrated lowest voltage value in the calibration database or greater than the maximum calibrated lowest voltage value in the calibration database, sending a prompt message indicating out of the measurement range.

6. The method according to any one of claims 1 to 5, characterized in that, Before measuring the thickness of the medium to be printed by a laser to obtain the lowest voltage value when the laser measures the thickness of the medium to be printed, it further includes: The thickness of a standard gauge block with a calibrated thickness is measured by the laser laser to obtain the calibrated minimum voltage value when the laser laser measures the thickness of the standard gauge block; The calibration database is constructed according to the calibrated thickness and the calibrated minimum voltage value.

7. The method according to any one of claims 1 to 5, characterized in that Before the thickness of the medium to be spray-printed is measured by the laser laser to obtain the minimum voltage value when the laser laser measures the thickness of the medium to be spray-printed, it further includes: Calibrating the installation position of the laser laser relative to the UV printing device.

8. An inkjet printing height adjustment device, characterized in that, The device includes: A measurement module for measuring the thickness of the medium to be spray-printed by a laser laser to obtain the minimum voltage value when the laser laser measures the thickness of the medium to be spray-printed; A conversion module for performing thickness conversion processing on the minimum voltage value according to a pre-constructed calibration database to obtain the thickness of the medium to be spray-printed; A calculation module for calculating the descending stroke of the Z-axis of the printing carriage of the UV printing device according to the thickness to obtain the required descending stroke of the Z-axis; An adjustment module for performing a descending adjustment on the Z-axis according to the required descending stroke to adjust the printing height of the medium to be spray-printed.

9. A UV inkjet printing device, characterized in that, The UV printing device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the printing height adjustment method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the printing height adjustment method according to any one of claims 1 to 7 is implemented.

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