CN-121988489-A - Dispensing visual compensation method and dispensing system based on visual compensation

Abstract

The invention provides a dispensing vision compensation method and a dispensing system based on vision compensation, wherein the dispensing system based on vision compensation comprises an image acquisition device, a rubber tube device and a system controller, wherein the system controller is electrically connected with the rubber tube device and the image acquisition device, the image acquisition device is used for acquiring a glue image of glue discharged from the rubber tube device, the system controller is used for identifying the glue width of a glue line based on the glue image and controlling the pressure of the rubber tube device according to the difference value of a set standard value, so that the glue discharge amount of the rubber tube device is changed.

Inventors

• ZHU HAIJIANG
• SONG ZHENDONG
• MA GUANGXIN
• HU ZHENPENG
• ZHANG ZHIWEN
• DING XIAOMING
• RUAN LIN
• Bai Zhaozhao

Assignees

• 宁波舜宇光电信息有限公司

Dates

Publication Date

20260508

Application Date

20241101

Claims (16)

1. 1. The system is characterized by comprising an image acquisition device, a rubber tube device and a system controller, wherein the system controller is electrically connected with the rubber tube device and the image acquisition device, the image acquisition device is used for acquiring a glue image of glue discharged from the rubber tube device, the system controller is used for identifying the glue width of a glue line based on the glue image and controlling the pressure of the rubber tube device according to the difference value of a set standard value so as to change the glue discharge amount of the rubber tube device, the rubber tube device comprises a rubber tube and a rubber needle arranged on the rubber tube, the rubber needle is provided with a positive rubber opening and at least one side rubber opening, and the side rubber opening is formed on the side face of the rubber needle.
2. 2. The vision-based dispensing system of claim 1, wherein the system controller comprises a processor, a pressure control device, and a pressure transmission device, wherein the processor is electrically connected to the pressure control device, the hose device is disposed at one end of the pressure transmission device, and the pressure control device is connected to the pressure transmission device.
3. 3. The vision-based compensated dispensing system of claim 2 wherein said processor calculates a compensated air pressure amount based on a linear relationship of air pressure to width of glue, said pressure control means controlling the pressure transmitted by said pressure transmission means based on the compensated air pressure amount.
4. 4. The vision-compensation-based dispensing system of claim 3, wherein the processor defines a threshold range, and maintains the dispensing of the hose device continuously when the identified line width is within the threshold range, reduces the amount of the adhesive dispensed from the hose device when the line width is outside the threshold range and is positive, and increases the amount of the adhesive dispensed from the hose device when the line width is outside the threshold range and is negative.
5. 5. The vision-based on-compensation dispensing system of claim 4, wherein the side glue port of the glue needle is formed at an end of the glue needle and communicates with the positive glue port of the glue needle.
6. 6. The vision-based on-compensation dispensing system of claim 5, wherein the cross-section of the side glue port of the glue needle along the glue needle axis is "V" -shaped.
7. 7. The vision-based compensated dispensing system of claim 5 wherein said side glue ports of said glue needle are V-formed grooves having an aspect ratio of 1:1.3.
8. 8. The visual compensation method for dispensing is characterized by comprising the following steps of: (a) Shooting a coated glue image, and identifying the width of a glue line according to the glue image; (b) At least one side glue port is arranged on the side face of a glue needle of the glue tube device, the side glue port is located above a positive glue port of the glue needle, whether the glue outlet amount is changed is judged according to the difference value between the width of a recognized glue line and a standard value, when the difference value is within a threshold range, the glue outlet amount of the glue tube device is not changed, when the difference value exceeds the threshold range and is a positive value, the glue outlet amount of the glue tube device is reduced, and when the difference value exceeds the threshold range and is a negative value, the glue outlet amount of the glue tube device is increased.
9. 9. The visual compensation method for dispensing according to claim 8, wherein in the step (b) of the visual compensation method for dispensing, when the amount of the adhesive discharged from the adhesive tube device needs to be adjusted, the pressure applied to the adhesive tube device is changed by adjusting the pressure transmission device, so as to change the amount of the adhesive discharged from the adhesive tube device.
10. 10. The visual compensation method of dispensing according to claim 8, wherein in the step (a) of the visual compensation method of dispensing, edges of the glue lines are extracted and fitted to glue line edge lines, and feature points of the glue lines are extracted correspondingly in the glue line edge lines and distances D are calculated.
11. 11. The visual compensation method for dispensing according to claim 8, wherein in the step (a) of the visual compensation method for dispensing, a section of the line of the glue having a linear distance L from the glue tube device is taken for edge extraction and fitting, and a standard value of the width of the line of the glue is set.
12. 12. The visual compensation method for dispensing according to claim 8, wherein said visual compensation method for dispensing further comprises the step of forming said side glue port of said glue needle with a "V" shaped slot in cross section.
13. 13. The vision compensation method of dispensing of claim 9, wherein the step (b) of the vision compensation method of dispensing further comprises the steps of: Calculating to obtain compensation quantity according to the width of the glue line identified by vision; Setting a minimum compensation unit, if the compensation amount is smaller than the minimum compensation unit, not performing compensation, and if the compensation amount is larger than the minimum compensation unit, performing compensation.
14. 14. The visual compensation method of dispensing according to claim 13, wherein in the step (b) of the visual compensation method of dispensing, before judging whether the compensation amount is smaller than the minimum compensation unit, the visually measured width of the glue is identified, and if the width of the pectin exceeds the threshold of the width of the glue, the machine is stopped to avoid ineffective compensation.
15. 15. The visual compensation method for dispensing according to claim 14, wherein the visual compensation method for dispensing further comprises the steps of (c) measuring the glue after compensation at least once and judging whether compensation is required, and if so, cycling the steps (a) and (b).
16. 16. The visual compensation method of dispensing of claim 15, wherein in said step (c) of said visual compensation method of dispensing, the number of cycles is less than or equal to 3, and after 2 post-compensation measurements, if the glue width is still unsatisfactory, the compensation is stopped.

Description

Dispensing visual compensation method and dispensing system based on visual compensation Technical Field The invention relates to the field of electronic manufacturing, in particular to a dispensing vision compensation method and a dispensing system based on vision compensation. Background Glue is favored by users as a bonding material mainly used in the electronic manufacturing industry, and the glue dispensing process is to extrude the glue in the glue tube. The continuous outflow of glue can make the capacity of glue in the rubber tube diminish, and the continuous of some glue goes on, and the more the height of glue descends, the volume of the cavity in the packing element increases. The capacity of the glue becomes smaller, which results in a decrease in the self weight of the glue itself. In order to ensure consistent glue discharge amount, after the dead weight of the glue is reduced, the air pressure device for dispensing the glue needs more time or more power to compress the cavity air to ensure that the glue discharge amount of the glue is unchanged before and after the glue discharge amount is reduced. When the glue amount is small in each glue outlet in microcosmic aspect, the glue outlet time and pressure are unchanged when the glue is continuously dispensed for the previous and the next time, so that the glue amount of the glue outlet for the previous and the next time is unchanged, and the glue dispensing process does not need to compensate along with the time in a short time. However, as the residual glue amount in the glue barrel is reduced, the pressure of the self weight of the glue is reduced, the glue outlet amount of the glue is gradually reduced, that is to say, as the glue dispensing process is continuously carried out, the self weight of the glue is reduced, when the same pressure is given to the glue pipe, the lower the glue outlet amount of the glue pipe is, and the shape of the glue is difficult to ensure. In addition, in the extremely miniaturized packaging technology, the ultra-narrow glue line process has low requirements on the glue line, for example, the active calibration (after the position between devices is actively calibrated, the glue arranged between the device bonding structures is called active calibration glue) glue line generally needs to be designed to have a width of 150um and a height of 150um, and the active calibration glue stacking ratio generally needs to be 1:1 (the glue stacking ratio is the ratio of glue height to glue width). In the prior art, the factors influencing the glue dispensing width and thickness are more, obviously the glue height or dead weight in the rubber tube can influence the glue dispensing width and thickness, the glue line width and thickness of the current glue dispensing technology are difficult to meet at the same time, the glue stacking ratio of the current glue drawing capability is often less than or equal to 75%, and the problems of poor appearance of functional NG and modules such as lenses, glue and the like also exist in the existing glue drawing products. Disclosure of Invention The invention provides a dispensing visual compensation method and a dispensing system based on visual compensation, wherein the dispensing visual compensation method solves the problem that the stacking ratio of glue lines is insufficient in a miniaturized design of a module, prevents the pollution of a lens caused by overflow of glue, reduces poor functions of color filter glue and poor appearance of the module caused by overflow of glue, or solves the problem that the stacking ratio of glue is insufficient, and improves the competitiveness of products. Another advantage of the present invention is to provide a dispensing vision compensation method and a dispensing system based on vision compensation, wherein the dispensing vision compensation method and the dispensing system based on vision compensation are suitable for actively calibrating a miniaturized module and a limit design of a drawing space. The invention further provides a dispensing visual compensation method and a dispensing system based on visual compensation, wherein the dispensing visual compensation method is to take the width of dispensing through visual shooting, and according to the pressure change rule of the cavity in the rubber cylinder, the pressure of compressed air is compensated during dispensing, so that the influence of the dead weight change of the glue on the consistency of the glue can be effectively reduced. Another advantage of the present invention is to provide a visual compensation method for dispensing and a dispensing system based on visual compensation, wherein the visual compensation method for dispensing utilizes visual algorithm detection to obtain a threshold value of the width of a glue line path, then compares the threshold value with a preset standard width, and calculates according to (linear relation between air pressure and width of glue) to obtai