Droplet ejection method and system based on character jet printing full-automatic production line

Abstract

The application discloses a micro-droplet jetting method and system based on a full-automatic production line of character jet printing, and relates to the technical field of character jet printing. The application solves the problem that, due to the fact that the internal structure of a jetted product is not considered, the situation that some areas are too thick and some areas are too shallow occurs in the jetting process. The application determines the jet printing effect by performing direction confirmation through relevant positioning of a to-be-jetted piece, performing micro-droplet jetting based on the confirmed direction, and completing jet printing. For the relevant thickness area of the jetted piece, the maximum influence area is determined by using area coincidence analysis. For the maximum influence area, variance confirmation is performed, and based on the confirmed different variance conditions, the peripheral area belonging to the maximum influence area is determined. Subsequently, the loss area is selected from the peripheral area, and based on the numerical comparison result between the loss area and the maximum influence area, the jetting speed of the relevant area is determined. Finally, relevant adjustment is performed to achieve better jet printing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of character jet printing, in particular to a micro-droplet jetting method and system based on a character jet printing full-automatic production line. BACKGROUND

[0002] The character jet printing full-automatic production line is a jet printing production line composed of a central control unit, two character jet printers, a composite plate turning machine, a distribution and transmission unit, etc., which can be connected with a customer MES system, bidirectionally automatically acquire and push the required board production information, adopt a tiled left-right double workbench structure, equivalent to two parallel production lines, and realize PCB board horizontal feeding and transmission through the embedded fork plate and transmission mechanism, the jet printing equipment uses a CCD to position, jet printing ink to the PCB board, and instant curing through a UV light source, completing A face jet printing, and then jet printing B face through the composite plate turning machine, realizing double-sided jet printing.

[0003] The application with publication number CN116587745A provides a packaging box variable information jet printing system based on time sequence. The system includes a control unit (4), a jet printing unit (2), a detection unit (3), a curing unit (5) and a conveyor belt (1). The jet printing unit adopts a single jet head, and the spraying time length of the jet head is accurately controlled by the control unit. The bar code characters corresponding to digits 0-9 in the code are represented by a jet time sequence. The jet head sprays ink according to the preset time sequence to generate corresponding black and white stripes. The detection unit monitors the jet printing process in real time and alarms faults through an industrial camera. After completing barcode detection, the final jet printing is realized through a curing device. The jet printing method supports various types of barcodes, such as EAN, UPC, Code128, etc., and is suitable for different product materials and colors.

[0004] The full-automatic production line thereof may cause the situations of partial areas being too thick and partial areas being too shallow to appear in the jetting process, thereby affecting the overall jet printing effect on the corresponding to-be-jetted piece, leading to the quality of the finished product being unable to be controlled, and thus better micro-droplet jetting effect cannot be achieved. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a micro-droplet jetting method and system based on a character jet printing full-automatic production line, which solves the problem that the situations of partial areas being too thick and partial areas being too shallow may appear in the jetting process due to not considering the internal structure of the jetted finished product.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a micro-droplet jetting method based on a character jet printing full-automatic production line, comprising the following steps:

[0007] S1) Position the part to be sprayed located above the fully automated production line. Use machine vision to confirm the relevant image of the part to be sprayed. Based on the image positioning analysis method, determine the spraying direction of the part to be sprayed and perform micro-droplet spraying. Mark the part to be sprayed after micro-droplet spraying as the completed part. The specific method is as follows:

[0008] S11. Based on the acquired relevant images of the part to be sprayed, determine the relevant contour of the part to be sprayed based on the edge contour of the images;

[0009] S12. Rotate the preset model of the part to be sprayed, and compare the outline of the model of the part to be sprayed confirmed in each different rotation process with the relevant outline. When the comparison results are completely consistent, confirm the spraying direction after rotation, mark the spraying direction after rotation as the spraying direction of this part to be sprayed, and spray it with micro-droplets according to the preset parameters. The preset parameters are the working parameters of the printing equipment in this production line.

[0010] S2) Perform thickness analysis on the finished sprayed parts above the fully automated production line. Use relevant high-precision detection equipment to identify the relevant spray thickness value of each micro-region of the finished sprayed part. Then, based on the different spray thickness values ​​of several different micro-regions, mark the finished sprayed part as an abnormal part and identify the associated excessively thick areas. The specific method is as follows:

[0011] S21. Based on the identification and scanning results of its high-precision detection equipment, the spraying thickness value of each different micro-region on the surface of the finished part is confirmed and calibrated as H. i , where i represents different micro-regions;

[0012] S22. The confirmed sets of spray thickness values ​​H i Compare with the preset value Y1: When H i When H > Y1, this micro-region is marked as an excessively thick micro-region. Related excessively thick micro-regions are merged, and the resulting merged region is marked as a related excessively thick region. This completed part is then marked as an abnormal part. i When Y1 ≤ Y1, no calibration is performed;

[0013] S3) After the first group of abnormal parts is confirmed, a monitoring cycle is defined. When the number of abnormal parts appearing within the monitoring cycle reaches 3 groups, a comprehensive analysis is performed on the associated excessively thick areas of the abnormal parts. Based on the comprehensive analysis results, the area with the greatest influence or a printing abnormality signal is generated. The specific method is as follows:

[0014] S31. Define a set of monitoring periods T, where T is a preset value. When the number of abnormal items in this monitoring period T reaches 3, if the corresponding abnormal item only generates one set of associated overthick areas, mark this associated overthick area as the area to be analyzed for this abnormal item. If the corresponding abnormal item generates multiple sets of associated overthick areas, select the area with the largest area from the multiple sets of associated overthick areas and mark it as the area to be analyzed for this abnormal item.

[0015] S32. Identify whether the areas to be analyzed marked by different abnormal items within this monitoring cycle T overlap: If several areas to be analyzed overlap, select the largest area from the several areas to be analyzed and mark it as the area with the greatest influence; if several areas to be analyzed do not overlap, generate a printing abnormality signal and display it directly.

[0016] S4) Based on the determined maximum influence area, determine its surrounding area; based on the thickness values ​​of the maximum influence area and the surrounding area, determine the ink movement direction, and then determine the ejection logic of the corresponding ejection component; the specific method is as follows:

[0017] S41. The number of sets of spray thickness values ​​H within the maximum influence zone... i Variance processing is performed to determine a set of variance values ​​Fc. The variance values ​​Fc are compared with the preset value Y2. If Fc > Y2, it represents the H of different micro-regions within the maximum influence area. i If the difference is large, proceed to step S43. If Fc ≤ Y2, it represents the H of different micro-regions within the maximum influence area. i If the difference is small, proceed to step S42;

[0018] S42. Based on the relevant contour of the maximum influence area, enlarge the relevant contour by 2 times and mark the newly added area relative to the relevant contour as the outer extension area;

[0019] S43. Determine the center point of the maximum influence zone, construct two sets of perpendicular lines, both of which pass through this center point. The endpoints of these perpendicular lines intersect the edge of the maximum influence zone in real time. Based on the constructed two sets of perpendicular lines, divide the maximum influence zone into four partitions, and based on several thickness values ​​H of each partition... i Confirm the average thickness of each partition, rotate the two sets of vertical lines clockwise, and ensure that the two endpoints of the vertical lines intersect the edge of the area of ​​maximum influence in real time during the rotation. Record the variance parameters generated by the four average thicknesses during the rotation. Confirm the variance parameters of each different rotation stage. From the confirmed variance parameters, determine the position of the two sets of vertical lines corresponding to the largest variance parameter and mark it as the standard position. Based on the determined standard position, lock the partition with the largest average thickness and mark it as the confirmation area.

[0020] Based on the two sets of relevant vertical lines of the confirmed area and the facing direction, the outer extension area is determined by enlarging and extending, and the area of ​​the outer extension area is consistent with the area of ​​the confirmed area.

[0021] S44. Extending from the outer perimeter area:

[0022] Search for its thickness value that satisfies H i Micro-regions <Bz are designated as loss regions, where Bz is the standard thickness value. Then, several H values ​​for different loss regions are further defined. i We perform mean processing to determine the average loss Lj, and then determine several H values ​​for the area of ​​greatest influence. i The mean value is calibrated as Yj. The relevant ratio B1 is determined by Yj÷Lj=B1. The spray rate P1 of the maximum influence area is lowered and the spray rate P2 of the loss area is increased. The spray rate is stopped when P2÷P1=B1. The determined relevant spray rate is recorded. This spray rate is used for printing on the same area of ​​the subsequent parts to be sprayed.

[0023] If H does not exist i For micro-regions <Bz, printing error signals are directly generated and displayed.

[0024] Preferably, the micro-droplet ejection system based on a fully automated character inkjet printing production line includes:

[0025] Positioning and Adjustment Module: Positions the part to be sprayed above the fully automated production line. It uses machine vision to confirm the relevant image of the part to be sprayed. Based on the image positioning analysis method, it determines the spraying direction of the part to be sprayed and performs micro-droplet spraying. The part to be sprayed after micro-droplet spraying is marked as a completed part.

[0026] Thickness Confirmation Module: Performs thickness analysis on the finished sprayed parts above the fully automated production line. Uses relevant high-precision detection equipment to identify the relevant spraying thickness value of each micro-region of the finished sprayed part. Based on the different spraying thickness values ​​of several different micro-regions, the finished sprayed part is marked as an abnormal part and the associated excessively thick area is identified.

[0027] Monitoring and Analysis Module: After the first group of abnormal parts is confirmed, a monitoring cycle is defined. When the number of abnormal parts that appear within the monitoring cycle reaches 3 groups, the associated overthick areas of the abnormal parts are comprehensively analyzed, and based on the comprehensive analysis results, the area with the greatest impact or a printing abnormality signal is generated.

[0028] Logic confirmation module: Based on the determined maximum influence area, determine its surrounding area; based on the thickness values ​​of the maximum influence area and the surrounding area, determine the ink movement direction; and then determine the ejection logic of the corresponding ejection component.

[0029] This invention provides a micro-droplet ejection method and system based on a fully automated character inkjet printing production line. Compared with existing technologies, it has the following advantages:

[0030] This invention confirms the direction of the print by positioning the workpiece, and then performs micro-droplet spraying based on the confirmed direction to complete the printing and determine the printing effect.

[0031] Subsequently, for the relevant thickness areas of the printed parts, a region overlap analysis method is used to determine the relevant maximum influence area. For the maximum influence area, the variance is confirmed. Based on the confirmed different variances, the outer area belonging to this maximum influence area is determined. Then, the loss area is selected from the outer area. Based on the numerical comparison results between the loss area and the maximum influence area, the spraying rate of its relevant area is determined. Finally, relevant adjustments are made to achieve a better printing effect. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0033] Figure 2 This is a schematic diagram illustrating the processing of the area with the greatest impact in this invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Please see Figure 1 This application provides a microdroplet ejection method based on a fully automated character inkjet printing production line, including the following steps:

[0037] S1) Position the part to be printed located above the fully automated production line. Use machine vision to confirm the relevant image of the part to be printed. Based on the image positioning analysis method, determine the spraying direction of the part to be printed and perform micro-droplet spraying. Mark the part to be printed after micro-droplet spraying as a finished part. Specifically, during the relevant positioning process of the part to be printed, because there is a slight positional deviation of the original device during the placement process, it is necessary to position the part to be printed to determine the spraying direction of the part to be printed and ensure the relevant effect of the printing spraying.

[0038] The specific method for determining this is as follows:

[0039] S11. Based on the acquired relevant images of the part to be sprayed, determine the relevant contour of the part to be sprayed based on the edge contour of the images;

[0040] S12. Rotate the preset model of the part to be sprayed, and compare the outline of the model of the part to be sprayed with the relevant outlines in each different rotation process. When the comparison results are completely consistent, confirm the spraying direction after rotation, mark the spraying direction after rotation as the spraying direction of the part to be sprayed, and spray it with micro-droplets according to the preset parameters. The preset parameters are the working parameters of the printing equipment in this production line, which are set in advance by the operator. The part to be sprayed has a relevant spraying direction. When the model of the part to be sprayed is rotated, its corresponding spraying direction also needs to be rotated to determine the final spraying direction.

[0041] S2) Perform thickness analysis on the finished sprayed parts from the fully automated production line. Use relevant high-precision testing equipment to identify the relevant spray thickness value of each micro-region of the finished sprayed part. Based on the different spray thickness values ​​of several different micro-regions, mark the finished sprayed part as an abnormal part and identify the associated excessively thick areas. The high-precision testing equipment generally uses relevant laser and ultrasonic equipment. The operator can select the relevant equipment to confirm the thickness of the sprayed area on the surface of the finished sprayed part and lock its spray thickness value. The specific method of determination is as follows:

[0042] S21. Based on the identification and scanning results of its high-precision detection equipment, the spraying thickness value of each different micro-region on the surface of the finished part is confirmed and calibrated as H. i , where i represents different micro-regions, and a micro-region can also be understood as a micro-point with a very small range. In order to achieve better detection results, it is necessary to confirm the spray thickness value of different micro-regions to determine the associated over-thickness area. The relevant range of the micro-region is confirmed by the scanning range of the high-precision detection equipment.

[0043] S22. The confirmed sets of spray thickness values ​​H i The value is compared with the preset value Y1, where the specific value of Y1 is determined by the operator based on experience. When H i When H ≤ Y1, no calibration is performed; when H ≤ Y1, no calibration is performed. i When Y1 > Y1, this micro-region is marked as an over-thick micro-region. Related over-thick micro-regions are merged (the existence of a correlation means that there is an overlapping line, that is, two adjacent micro-regions are both over-thick micro-regions, so the two over-thick micro-regions can be merged to determine the related over-thick area). The related area after the final merger is marked as the related over-thick area, and this finished part is marked as an abnormal part.

[0044] Specifically, each different micro-region corresponds to a different thickness value. Because the internal area of ​​the part being sprayed is uneven, ink from the convex areas will flow to the concave areas during the micro-droplet spraying process, resulting in uneven thickness. To address this, it is necessary to control the spraying components during the micro-droplet spraying process to ensure the spraying effect of the corresponding areas and adjust and correct the uneven thickness.

[0045] S3) After the first group of abnormal parts is confirmed, a monitoring cycle is defined. When the number of abnormal parts appearing within the monitoring cycle reaches 3 groups, a comprehensive analysis is performed on the associated excessively thick areas of the abnormal parts. Based on the comprehensive analysis results, the area with the greatest influence or a printing abnormality signal is determined. The specific method for determination is as follows:

[0046] S31. Define a monitoring cycle T, where T is a preset value. The specific value is determined by the operator based on experience, and T is generally set to 5 minutes. When the number of abnormal parts in this monitoring cycle T reaches 3 sets, if the corresponding abnormal part only produces one set of associated overthick areas, this associated overthick area is marked as the area to be analyzed for this abnormal part. If the corresponding abnormal part produces multiple sets of associated overthick areas, select the largest area from the multiple sets of associated overthick areas and mark it as the area to be analyzed for this abnormal part.

[0047] S32. Identify whether the areas to be analyzed for different abnormal parts within this monitoring cycle T overlap: If several areas to be analyzed overlap, select the largest area from these areas and mark it as the area of ​​greatest influence. If several areas to be analyzed do not overlap, generate a printing abnormality signal and display it directly. External personnel can use this printing abnormality signal to inspect the relevant parts of the fully automated production line, determine whether there are any problems with the printhead, and handle them in a timely manner to assess the relevant causes of such abnormalities, prevent the recurrence of related abnormal parts, and ensure the subsequent printing effect.

[0048] S4) Based on the determined maximum influence area, determine its surrounding area. Based on the thickness values ​​of the maximum influence area and the surrounding area, determine the ink movement direction, and then determine the ejection logic of the corresponding ejection component to avoid such abnormalities from occurring again. The specific method for determining this is as follows:

[0049] S41. The number of sets of spray thickness values ​​H within the maximum influence zone... i Variance processing is performed to determine a set of variance values ​​Fc. These Fc values ​​are then compared with a preset value Y2, where the specific value of Y2 is determined by the operator based on experience. If Fc > Y2, it represents the H value of different micro-regions within the maximum influence area. iIf the difference is large, proceed to step S43. If Fc ≤ Y2, it represents the H of different micro-regions within the maximum influence area. i If the difference is small, proceed to step S42, where the specific method for variance processing is as follows: Several sets of spray thickness values ​​H... i Perform mean processing to determine the undetermined mean J, where i = 1, 2, ..., n, and use... Determine its corresponding variance value Fc;

[0050] S42. Based on the relevant contour of the maximum influence area, enlarge the relevant contour by 2 times and mark the newly added area relative to the relevant contour as the outer extension area;

[0051] S43, Combination Figure 2 The center point of the area of ​​maximum influence is determined, and two sets of perpendicular lines are constructed, both passing through this center point. The endpoints of these perpendicular lines intersect the edge of the area of ​​maximum influence in real time (meaning that during subsequent rotation, the edge points of these perpendicular lines will always intersect the area of ​​maximum influence). Based on the two sets of perpendicular lines, the area of ​​maximum influence is divided into four partitions, and several thickness values ​​H are used for each partition. i Confirm the average thickness of each partition (that is, the average thickness value of the corresponding partition is processed to determine the average thickness), rotate the two sets of vertical lines in a clockwise direction, and during the rotation, the two endpoints of the vertical lines intersect the edge of the maximum influence area in real time, and record the variance parameters generated by the four average thickness values ​​during the rotation. Confirm the variance parameters of each different rotation stage one by one. From the confirmed sets of variance parameters, determine the position of the two sets of vertical lines corresponding to the largest set of variance parameters and mark it as the standard position. Based on the determined standard position, lock the partition with the largest average thickness and mark it as the confirmation area.

[0052] Based on the two sets of relevant vertical lines of the confirmed area and the facing direction, the outer extension area is determined by enlarging and extending, and the area of ​​the outer extension area is consistent with the area of ​​the confirmed area.

[0053] S44. Extending from the outer perimeter area:

[0054] Search for its thickness value that satisfies H i Micro-regions with a thickness < Bz are designated as loss zones, where Bz is the standard thickness value, determined by the operator based on experience, and Bz < Y1. Several H values ​​for different loss zones are then... i We perform mean processing to determine the average loss Lj, and then determine several H values ​​for the area of ​​greatest influence. iThe mean value is calibrated as Yj. The relevant ratio B1 is determined by Yj÷Lj=B1. The spray rate P1 of the maximum influence area is lowered and the spray rate P2 of the loss area is increased. The spray rate is stopped when P2÷P1=B1. The determined relevant spray rate is recorded. This spray rate is used for printing on the same area of ​​the subsequent parts to be sprayed.

[0055] If H does not exist i The micro-area <Bz will directly generate and display a printing abnormality signal. Based on this printing abnormality signal, external personnel can inspect the relevant parts of the fully automated production line to determine whether there are any related problems with the print head.

[0056] Specifically, for the determined maximum influence area, there are two situations: one is that the variance meets the standard, and the other is that the variance does not meet the standard. If the variance meets the standard, the maximum influence area should be a concave area, and the corresponding outer area can be determined by directly enlarging the edge contour.

[0057] If the variance is not up to standard, the thickness values ​​produced by different areas within the maximum influence area will be different. This may indicate that the area is sloped or otherwise unsuitable. In such cases, it is necessary to find the group of areas with the thickest thickness within the region. This can be done by determining the center point and a vertical line to divide the maximum influence area into partitions. Then, by rotating the partitions, the variance values ​​of several partitions can be determined. When the variance is the largest, it means that the mean values ​​of each partition differ the most, thus identifying the group of areas with the largest thickness values. This confirms the area mentioned above. Based on the corresponding confirmed area, the corresponding peripheral extension area can be locked. Through relevant numerical analysis, the relevant spraying rate can be determined, and finally, relevant adjustments can be made to achieve better printing results.

[0058] Example 2

[0059] The micro-droplet jetting system based on a fully automated character inkjet printing production line includes:

[0060] Positioning and Adjustment Module: Positions the part to be sprayed above the fully automated production line. It uses machine vision to confirm the relevant image of the part to be sprayed. Based on the image positioning analysis method, it determines the spraying direction of the part to be sprayed and performs micro-droplet spraying. The part to be sprayed after micro-droplet spraying is marked as a completed part.

[0061] The thickness confirmation module analyzes the thickness of the sprayed parts that have been sprayed on the fully automated production line. It uses relevant high-precision detection equipment to identify the relevant spraying thickness value of each micro-region of the sprayed part. Based on the different spraying thickness values ​​of several different micro-regions, the sprayed part is marked as an abnormal part and the associated excessively thick area is identified.

[0062] After the first set of abnormal parts is confirmed, the monitoring and analysis module defines a monitoring cycle. When the number of abnormal parts that appear within the monitoring cycle reaches 3 sets, it performs a comprehensive analysis on the associated overthick areas of the abnormal parts and determines the area with the greatest impact or generates a printing abnormality signal based on the comprehensive analysis results.

[0063] The logic confirmation module determines the surrounding area based on the determined maximum influence area, and determines the ink movement direction based on the thickness values ​​of the maximum influence area and the surrounding area, and then determines the ejection logic of the corresponding ejection component.

[0064] Example 3

[0065] In its specific implementation, this embodiment includes all the implementation processes of the two sets of embodiments described above.

[0066] Some of the data in the above formulas are numerical calculations with dimensions removed, and the contents not described in detail in this specification are all prior art known to those skilled in the art.

[0067] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A micro-droplet ejection method based on a fully automated character inkjet printing production line, characterized in that, Includes the following steps: S1) Position the part to be sprayed located above the fully automated production line, use machine vision to confirm the relevant image of the part to be sprayed, determine the spraying direction of the part to be sprayed based on the image positioning analysis method, and perform micro-droplet spraying. The part to be sprayed after micro-droplet spraying is marked as the finished part. S2) Perform thickness analysis on the finished sprayed parts above the fully automated production line. Use relevant high-precision detection equipment to identify the relevant spraying thickness value of each micro-region of the finished sprayed part. Then, based on the different spraying thickness values ​​of several different micro-regions, mark the finished sprayed part as an abnormal part and identify the associated excessively thick areas. The specific method is as follows: S21. Based on the identification and scanning results of its high-precision detection equipment, the spraying thickness value of each different micro-region on the surface of the finished part is confirmed and calibrated as H. i , where i represents different micro-regions; S22. The confirmed sets of spray thickness values ​​H i Compare with the preset value Y1: When H i When the value is greater than Y1, this micro-region is marked as an excessively thick micro-region. Related excessively thick micro-regions are merged, and the related regions after the final merger are marked as related excessively thick regions. This completed part is marked as an abnormal part. S3) After the first set of abnormal parts is confirmed, a monitoring cycle is defined. When the number of abnormal parts that appear within the monitoring cycle reaches 3 sets, the associated overthick areas of the abnormal parts are comprehensively analyzed, and based on the comprehensive analysis results, the area with the greatest influence or a printing abnormal signal is generated. S4) Based on the determined maximum influence area, determine its surrounding area. Based on the thickness values ​​of the maximum influence area and the surrounding area, determine the ink movement direction, and then determine the ejection logic of the corresponding ejection component. The specific method is as follows: S41. The number of sets of spray thickness values ​​H within the maximum influence zone... i Variance processing is performed to determine a set of variance values ​​Fc. The variance values ​​Fc are compared with the preset value Y2. If Fc > Y2, it represents the H of different micro-regions within the maximum influence area. i If the difference is large, proceed to step S43. If Fc ≤ Y2, it represents the H of different micro-regions within the maximum influence area. i If the difference is small, proceed to step S42; S42. Based on the relevant contour of the maximum influence area, enlarge the relevant contour by 2 times and mark the newly added area relative to the relevant contour as the outer extension area; S43. Determine the center point of the maximum influence zone, construct two sets of perpendicular lines, both of which pass through this center point. The endpoints of these perpendicular lines intersect the edge of the maximum influence zone in real time. Based on the constructed two sets of perpendicular lines, divide the maximum influence zone into four partitions, and based on several thickness values ​​H of each partition... i Confirm the average thickness of each partition, rotate the two sets of vertical lines clockwise, and ensure that the two endpoints of the vertical lines intersect the edge of the area of ​​maximum influence in real time during the rotation. Record the variance parameters generated by the four average thicknesses during the rotation. Confirm the variance parameters of each different rotation stage. From the confirmed variance parameters, determine the position of the two sets of vertical lines corresponding to the largest variance parameter and mark it as the standard position. Based on the determined standard position, lock the partition with the largest average thickness and mark it as the confirmation area. Based on the two sets of relevant vertical lines of the confirmed area and the facing direction, the outer extension area is determined by enlarging and extending, and the area of ​​the outer extension area is consistent with the area of ​​the confirmed area. S44. Extending from the outer perimeter area: Search for its thickness value that satisfies H i Micro-regions <Bz are designated as loss regions, where Bz is the standard thickness value. Then, several H values ​​for different loss regions are further defined. i We perform mean processing to determine the average loss Lj, and then determine several H values ​​for the area of ​​greatest influence. i The mean value is calibrated as Yj. The relevant ratio B1 is determined by Yj÷Lj=B1. The spray rate P1 of the maximum influence area is reduced, and the spray rate P2 of the loss area is increased. The spray rate is stopped when P2÷P1=B1. The determined relevant spray rate is recorded. This spray rate is used for printing on the same area of ​​the subsequent parts to be sprayed.

2. The micro-droplet jetting method based on a fully automated character inkjet printing production line according to claim 1, characterized in that, In step S1, the specific method for marking the part to be sprayed as a completed part is as follows: S11. Based on the acquired relevant images of the part to be sprayed, determine the relevant contour of the part to be sprayed based on the edge contour of the images; S12. Rotate the preset model of the part to be sprayed, and compare the outline of the model of the part to be sprayed confirmed in each different rotation process with the relevant outline. When the comparison results are completely consistent, confirm the spraying direction after rotation, mark the spraying direction after rotation as the spraying direction of this part to be sprayed, and spray it with micro-droplets according to the preset parameters. The preset parameters are the working parameters of the printing equipment in this production line.

3. The micro-droplet jetting method based on a fully automated character inkjet printing production line according to claim 1, characterized in that, In step S22, when H i When Y ≤ Y1, no calibration is performed.

4. The micro-droplet jetting method based on a fully automated character inkjet printing production line according to claim 1, characterized in that, In step S3, the specific method for determining the maximum affected area or generating the printing abnormality signal is as follows: S31. Define a set of monitoring periods T, where T is a preset value. When the number of abnormal items in this monitoring period T reaches 3, if the corresponding abnormal item only generates one set of associated overthick areas, mark this associated overthick area as the area to be analyzed for this abnormal item. If the corresponding abnormal item generates multiple sets of associated overthick areas, select the area with the largest area from the multiple sets of associated overthick areas and mark it as the area to be analyzed for this abnormal item. S32. Identify whether the areas to be analyzed for different abnormal items within this monitoring period T overlap: If several areas to be analyzed overlap, select the largest area from the several areas to be analyzed and mark it as the area of ​​maximum influence; if several areas to be analyzed do not overlap, generate a printing abnormality signal and display it directly.

5. The micro-droplet jetting method based on a fully automated character inkjet printing production line according to claim 1, characterized in that, In step S44, if H does not exist i For micro-regions <Bz, printing error signals are directly generated and displayed.

6. A micro-droplet jetting system based on a fully automated character inkjet printing production line, the system operating based on the micro-droplet jetting method based on a fully automated character inkjet printing production line according to any one of claims 1-5, characterized in that, include: Positioning and Adjustment Module: Positions the part to be sprayed above the fully automated production line. It uses machine vision to confirm the relevant image of the part to be sprayed. Based on the image positioning analysis method, it determines the spraying direction of the part to be sprayed and performs micro-droplet spraying. The part to be sprayed after micro-droplet spraying is marked as a completed part. Thickness Confirmation Module: Performs thickness analysis on the finished sprayed parts above the fully automated production line. Uses relevant high-precision detection equipment to identify the relevant spraying thickness value of each micro-region of the finished sprayed part. Based on the different spraying thickness values ​​of several different micro-regions, the finished sprayed part is marked as an abnormal part and the associated excessively thick area is identified. Monitoring and Analysis Module: After the first group of abnormal parts is confirmed, a monitoring cycle is defined. When the number of abnormal parts that appear within the monitoring cycle reaches 3 groups, the associated overthick areas of the abnormal parts are comprehensively analyzed, and based on the comprehensive analysis results, the area with the greatest impact or a printing abnormality signal is generated. Logic confirmation module: Based on the determined maximum influence area, determine its surrounding area; based on the thickness values ​​of the maximum influence area and the surrounding area, determine the ink movement direction; and then determine the ejection logic of the corresponding ejection component.

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