A method and system for splitting fmm panels

Abstract

The application provides a method and system for segmenting FMM plates. The method comprises identifying whether the segmentation strip on the FMM plate after the first etching and before the etching back protection film is removed is an etching residual segmentation strip, determining the etching parameters corresponding to the secondary etching according to the gray scale image of the etching residual segmentation strip; based on the coordinate range of each etching residual segmentation strip and the etching parameters corresponding thereto, combining the contour image of the etching front surface non-etching area (product unit area) of the FMM plate to control the precise spraying mechanism and etching nozzle to perform secondary etching on all etching residual segmentation strips. The technical solution provided by the application accurately identifies the etching residual segmentation strips on the FMM with the aid of image recognition technology, accurately controls the spraying mechanism and etching nozzle to perform secondary etching on the etching residual segmentation strips, ensures that the product unit will not be damaged when the protection film is removed, and improves the yield of FMM products.

Description

A method and system for splitting FMM boards Technical Field

[0001] This application relates to the field of metal fine mask (FMM) fabrication, and specifically to a method and system for segmenting FMM sheets. Background Technology

[0002] To improve the utilization rate of FMM (Fiberglass Modified Metal) sheets, current FMM product manufacturing generally adopts a multi-row layout design (i.e., arranging multiple product units side-by-side within the effective width of the FMM material), and separating the FMM product units by etching pre-set dividing strips. The existing process for dividing FMM sheets is as follows: a protective film is applied to the FMM surface on side A to shield the product unit area (the unetched area). Then, the dividing strip area is completely etched (the design goal is to etch to the bottom of the material, achieving a "complete cut"). After etching, the protective film on side A (the side facing away from the etching nozzle) is removed, separating the FMM product. However, due to differences in product design width and sheet thickness, existing etching and dividing techniques (with consistent etching amounts across products) cannot guarantee complete etching of the dividing strip area. Etching material (FMM sheet) residue often remains in the dividing strip area, causing damage to the product unit when removing the protective film, thus reducing the yield of the FMM product. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies that use etching to separate FMM (Factory Metal Modular) sheets into FMM product units, this application provides a technical solution for separating FMM sheets. This solution utilizes computer image processing technology to identify etched dividing strips on the FMM sheet. By combining the contour image of the non-etched area on the FMM sheet surface, the coordinate range of each etched dividing strip, and its etching parameters, a precision spraying mechanism and etching nozzle are controlled to perform secondary etching on the etched dividing strips. This ensures that the product units are not torn or damaged when the protective film on the back of the FMM sheet is removed.

[0004] The first aspect of this application provides a method for segmenting FMM (Fiberglass Modulated Metal) sheets. The method includes: acquiring an etched front image of the FMM sheet after initial etching, with the protective film on the etched back side still intact; and extracting the true outline and grayscale image of each segmentation strip from the etched front image. The grayscale image is then compared one by one with a standard grayscale image of the fully etched segmentation strip to identify whether each segmentation strip is a residual etched segmentation strip. Grayscale value analysis is performed on the grayscale image of the residual etched segmentation strip to obtain the corresponding secondary etching parameters, and the coordinate range and corresponding secondary etching parameters of all residual etched segmentation strips are output.

[0005] Based on the outline image of the non-etched area on the front side of the FMM board, the coordinate range of each etched residual dividing strip, and the corresponding secondary etching parameters, the precision spraying mechanism and etching nozzle are controlled to complete the secondary etching of all etched residual dividing strips to prevent damage to the product unit when the protective film is removed.

[0006] Furthermore, acquiring the etched front image of the FMM board after the initial etching includes: using a polarizing filter to convert the light emitted from the ring light source into linearly polarized light that is incident on the etched front of the FMM board, and then capturing the etched front image of the FMM board with a camera. The incident light becomes linearly polarized after polarization filtering, which can suppress random scattered light and enhance the uniformity of directional illumination in the segmented area. The longer the reflection / scattering path of the light within the etched grooves, the weaker the light intensity returning to the camera, and the lower the corresponding pixel grayscale value.

[0007] Furthermore, controlling the precision spraying mechanism and etching nozzle to complete the secondary etching of all etched residual dividing strips includes: calculating the corresponding obstacle avoidance spraying area based on the contour image of the non-etched area and the coordinate range of each etched residual dividing strip; the obstacle avoidance spraying area covers the corresponding product unit area on the etched front surface of the FMM board and extends beyond the edge of the corresponding product unit area by several micrometers. Based on the corresponding obstacle avoidance spraying area, the precision spraying mechanism is controlled to perform protective spraying on the non-etched area on the etched front surface of the FMM board. After spraying, the etching nozzle is controlled to complete the secondary etching of all etched residual dividing strips according to the secondary etching parameters corresponding to each etched residual dividing strip.

[0008] Preferably, identifying whether each segment is an etch residue segment includes: identifying all locations where the etching depth of each segment is insufficient based on a standard grayscale image of a fully etched segment, as initial screening locations. The percentage of the total area of ​​the initial screening locations relative to the area of ​​the corresponding segment is calculated; if this percentage exceeds a preset threshold, the corresponding segment is determined to be an etch residue segment. Based on experience, when the percentage is below the preset threshold, the tearing damage to the product unit when removing the protective film on the back of the FMM is almost negligible. For example, when the percentage is less than 10%, removing the protective film on the back of the FMM will cause almost no damage to the product unit.

[0009] Furthermore, the grayscale analysis of the grayscale image of the etched residual dividing strip to obtain the corresponding secondary etching parameters includes: determining the secondary etching depth of the corresponding etched residual dividing strip based on the thickness of the FMM board and the pre-established correspondence between grayscale values ​​and etching depth; and obtaining the secondary etching duration based on the secondary etching depth of each etched residual dividing strip.

[0010] Corresponding to the above-described method for segmenting FMM boards, a second aspect of this application also provides a system for segmenting FMM boards. The system includes: an image acquisition unit, an etching residual segmentation bar recognition unit, and an etching execution unit.

[0011] The image acquisition unit uses a camera and a ring light source to acquire an etched front image of the FMM board after the initial etching, before the protective film on the back is removed. It then extracts the true outline and grayscale image of each segment from the etched front image. The residual etched segment identification unit compares each grayscale image with a standard grayscale image of the fully etched segment to identify whether each segment is a residual etched segment. It performs grayscale value analysis on the grayscale image of each residual etched segment to obtain the corresponding secondary etching parameters, and outputs the coordinate range of all residual etched segments and the corresponding secondary etching parameters to the etching execution unit.

[0012] The etching execution unit includes a vision system, a precision spraying mechanism, and an etching nozzle. The vision system captures the outline image of the non-etched area on the etched front side of the FMM board, combines the coordinate range of each etched residual dividing strip with its secondary etching parameters, and controls the precision spraying mechanism and etching nozzle to perform secondary etching on the etched residual dividing strip to prevent damage to the product units on the FMM board when the protective film is removed.

[0013] The aforementioned vision system controls the precision spraying mechanism and etching nozzle to perform secondary etching on the residual etched dividing strips. This includes: calculating the corresponding obstacle avoidance spraying area based on the outline image of the non-etched area on the etched front of the FMM board and the coordinate range of each residual etched dividing strip; the obstacle avoidance spraying area covers the corresponding product unit area on the etched front of the FMM board and extends beyond the edge of the corresponding product unit area by several micrometers; based on the corresponding obstacle avoidance spraying area, controlling the precision spraying mechanism to perform protective spraying on the non-etched area on the etched front of the FMM board; after spraying, controlling the etching nozzle to complete the secondary etching of all residual etched dividing strips according to the secondary etching parameters corresponding to each residual etched dividing strip. Other implementation details of the FMM board segmentation system provided in this application are the same as the above-described FMM board segmentation method, and will not be repeated here.

[0014] The method and system for segmenting FMM boards provided in this application can effectively solve the problem of residual etching on the segmentation strips that is prone to occur in existing etching segmentation methods for FMM boards. It also reduces or avoids product unit breakage when removing the protective film from the etched back of the FMM board, thereby improving the yield of FMM product manufacturing. The solution provided in this application only requires simple logical judgment of grayscale images; the algorithm is simple and computationally intensive, thus reducing the manufacturing cost of related equipment / systems. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 is a flowchart of one embodiment of the method for dividing FMM sheets provided in this application.

[0017] Figure 2 is a schematic diagram of one embodiment of the system for segmenting FMM sheets in this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] As shown in Figure 1, in one embodiment of the method for segmenting FMM boards provided in this application, the method includes:

[0020] S1. Image acquisition is performed on the segmented areas of the FMM board after etching, where the protective film on the etched back side has not been removed. This step can be achieved by: using a polarizing filter to convert the light emitted from the ring light source into linearly polarized light that is incident on the etched front side of the FMM board; and capturing an image of the etched front side of the FMM board using a high-precision industrial-grade camera. Then, based on the etched front side image, the true contours of each segmented strip are extracted (which can be done using an edge detection algorithm + grayscale gradient) and grayscale images.

[0021] After being polarized and filtered, the incident light becomes linearly polarized, which can suppress random scattered light and enhance the uniformity of directional illumination in the segmented area. The longer the reflection / scattering path of light within the etched groove, the weaker the light intensity returning to the camera, and the lower the corresponding pixel grayscale value.

[0022] S2. Identify residual etching segments and determine the coordinate range and corresponding secondary etching parameters for all residual etching segments. Each segment is identified as a residual etching segment by comparing its grayscale image with a standard grayscale image showing the complete etching of the segments. Grayscale value analysis is performed on the grayscale image of each residual etching segment to obtain the corresponding secondary etching parameters, and the coordinate range and corresponding secondary etching parameters for all residual etching segments are output. Since the longer the light reflection / scattering path within the etched groove, the weaker the light intensity returning to the camera, and the lower the corresponding pixel grayscale value, areas with grayscale values ​​higher than a certain threshold can be identified as having residual etching / incomplete etching.

[0023] In some embodiments, the identification of whether each segment is an etch residue segment is implemented as follows: All locations where the etching depth of each segment is insufficient are identified by referring to a standard grayscale image of a fully etched segment, serving as initial screening locations. The percentage of the area of ​​all initially screened locations relative to the area of ​​the corresponding segment is calculated. If this percentage exceeds a preset threshold, the corresponding segment is determined to be an etch residue segment. This setting significantly improves the speed of determining whether a segment is an etch residue segment, because it only requires calculating whether the number of pixels with pixel values ​​greater than the corresponding threshold is greater than the total number of pixels occupied by the corresponding segment, and since the area of ​​the segment is fixed, the total number of pixels occupied is also fixed. This method of determining etch residue segments avoids edge calculations for fine, complex, and irregular etch residue areas, significantly improving the identification speed and thus not reducing / not decreasing the travel speed of the FMM thin material during etching. Based on experience, when the percentage is less than 10%, removing the protective film on the back of the FMM will cause almost no damage to the product unit.

[0024] Furthermore, the grayscale value analysis of the grayscale image of each etched residual segment to obtain the corresponding secondary etching parameters includes: for all etched residual segment, determining the secondary etching depth corresponding to each etched residual segment based on the thickness of the FMM board and the pre-established correspondence between grayscale value and etching depth; and obtaining the secondary etching duration based on the secondary etching depth of each etched residual segment.

[0025] S3. Based on the contour image of the non-etched area on the front side of the FMM board, the coordinate range of each etched residual dividing strip, and the corresponding secondary etching parameters, perform secondary etching.

[0026] Furthermore, performing secondary etching on the etched residual dividing strips includes: based on the contour image of the non-etched area on the FMM board (etched front side), the coordinate range of each etched residual dividing strip, and the corresponding secondary etching parameters, controlling the precision spraying mechanism and etching nozzle to complete the secondary etching of all etched residual dividing strips to prevent damage to the product unit when the protective film is removed.

[0027] Preferably, controlling the precision spraying mechanism and etching nozzle to perform secondary etching on all residual etched segments includes: calculating a corresponding obstacle avoidance spraying area based on the outline image of the non-etched area on the etched front of the FMM board and the coordinate range of each residual etched segment; the obstacle avoidance spraying area covers the corresponding product unit area and extends beyond the edge of the corresponding product unit area by several micrometers. Based on the corresponding obstacle avoidance spraying area, the precision spraying mechanism is controlled to perform protective spraying on the non-etched area on the etched front of the FMM board. After spraying, the etching nozzle is controlled to complete the secondary etching of all residual etched segments according to the etching parameters corresponding to each residual etched segment.

[0028] The precision spraying mechanism can use a piezoelectric spray head (accuracy ±0.05mm) to spray the protective film material (such as UV-curable adhesive, thickness 5-10μm) onto the etched front side of the FMM board. After spraying, it is quickly cured by a UV lamp (curing time <2s). The etching spray head (generally a laser spray head or a chemical spray head) only performs secondary etching on the area of ​​the remaining etched dividing strips.

[0029] Corresponding to the above-described method for segmenting FMM boards, a second aspect of this application also provides a system for segmenting FMM boards. In the embodiment shown in FIG2, the system 100 for segmenting FMM boards includes: an image acquisition unit 101, an etching residual segmentation bar recognition unit 102, and an etching execution unit 103.

[0030] The image acquisition unit 101 uses a camera in conjunction with a ring light source to acquire the etched front image of the FMM board after the initial etching and before the protective film is removed, and extracts the true outline and grayscale image of each segment from the etched front image.

[0031] The etching residue segmentation bar identification unit 102 compares the grayscale image with a standard grayscale image of the fully etched segmentation bars to identify whether each segmentation bar is an etching residue segmentation bar. Grayscale value analysis is performed on the grayscale image of the etching residue segmentation bars to obtain the corresponding secondary etching parameters, and the coordinate range of all etching residue segmentation bars and the corresponding secondary etching parameters are output to the etching execution unit 103.

[0032] The etching execution unit 103 includes a vision system 1031, a precision spraying mechanism 1032, and an etching nozzle 1033. The vision system 1031 captures the contour image of the non-etching area on the front side of the FMM board, combines the coordinate range of each etching residue segmentation strip and its secondary etching parameters, and controls the precision spraying mechanism 1032 and the etching nozzle 1033 to perform secondary etching on all the etching residue segmentation strips to prevent damage to the product units on the FMM board when tearing off the protective film. The vision system 1031 can send corresponding position coordinates and parameter instructions to the precision spraying mechanism 1032 / etching nozzle 1033 through an industrial Ethernet (transmission delay < 10ms).

[0033] The vision system 1031 controls the precision spraying mechanism 1032 and the etching nozzle 1033 to perform secondary etching on all the etching residue segmentation strips, including: calculating the corresponding obstacle avoidance spraying area based on the non-etching area contour image and the coordinate range of each etching residue segmentation strip. The obstacle avoidance spraying area is located on the front side of the FMM board for etching, covers the corresponding product unit area, and extends several microns beyond the edge of the corresponding product unit area. Controlling the precision spraying mechanism to perform protective spraying on the non-etching area on the front side of the FMM board based on the corresponding obstacle avoidance spraying area, and after the spraying is completed, controlling the etching nozzle to complete the secondary etching of all the etching residue segmentation strips according to the secondary etching parameters corresponding to each segmentation strip of the etching residue.

[0034] The implementation details of the above FMM board segmentation system are the same as those of the above FMM board segmentation method, and will not be elaborated here.

[0035] The method and system for segmenting FMM boards provided in this application use a special image acquisition method combined with a simple image processing algorithm to accurately identify the segmentation strips of etching residues, and cooperate with the real-time data interaction and linkage control of the vision system, spraying mechanism, and etching nozzle to form secondary etching of the etching residue segmentation strips. With the technical solution provided in this application, the problem of etching residue of segmentation strips in the existing etching segmentation FMM board solution can be effectively solved, effectively avoiding tearing and damage of product units when tearing off the protective film on the back side of the FMM board for etching, and greatly improving the production yield of FMM products.

[0036] The above are only embodiments of this application and are not used to limit this application. For those skilled in the art, various changes and modifications can be made to the technical solutions provided in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A method for dividing FMM (Fiberglass Modulated Metal) sheets, characterized in that, The method includes: acquiring an etched front image of the FMM board after the initial etching, with the protective film still attached to the etched back side; extracting the true outline and grayscale image of each segment from the etched front image; comparing each grayscale image with a standard grayscale image of the fully etched segment to identify whether each segment is an etched residual segment; performing grayscale value analysis on the grayscale image of the etched residual segment to obtain the corresponding secondary etching parameters, and outputting the coordinate range of all etched residual segment and the corresponding secondary etching parameters; based on the outline image of the non-etched area on the etched front of the FMM board, the coordinate range of each etched residual segment, and the corresponding secondary etching parameters, controlling a precision spraying mechanism and an etching nozzle to complete the secondary etching of all etched residual segment to prevent damage to the product units on the FMM board when the protective film is removed.

2. The method as described in claim 1, characterized in that, The process of acquiring the etched front image of the FMM board after the initial etching includes: using a polarizing filter to convert the light emitted from the ring light source into linearly polarized light that is incident on the etched front of the FMM board; and taking an image of the etched front of the FMM board with a camera.

3. The method as described in claim 1, characterized in that, The process of controlling the precision spraying mechanism and etching nozzle to complete the secondary etching of all etched residual dividing strips includes: calculating the corresponding obstacle avoidance spraying area based on the contour image of the non-etched area and the coordinate range of each etched residual dividing strip; the obstacle avoidance spraying area covers the corresponding product unit area on the etched front of the FMM board and extends beyond the edge of the corresponding product unit area by several micrometers; controlling the precision spraying mechanism to perform protective spraying on the non-etched area on the etched front of the FMM board based on the corresponding obstacle avoidance spraying area; and controlling the etching nozzle to complete the secondary etching of all etched residual dividing strips according to the secondary etching parameters corresponding to each etched residual dividing strip after the spraying is completed.

4. The method according to any one of claims 1-3, characterized in that, The process of identifying whether each segment is an etch residue segment includes: identifying all positions where the etching depth of each segment is insufficient by referring to a standard grayscale image of a fully etched segment, and using these as initial screening positions; calculating the percentage of the total area of ​​the initial screening positions of each segment relative to the area of ​​the corresponding segment; and if the percentage exceeds a preset threshold, then the corresponding segment is determined to be an etch residue segment.

5. The method as described in claim 4, characterized in that, The grayscale analysis of the grayscale image of the etched residual dividing strip to obtain the corresponding secondary etching parameters includes: determining the secondary etching depth of the corresponding etched residual dividing strip based on the thickness of the FMM board and the pre-established correspondence between grayscale values ​​and etching depth; and obtaining the secondary etching duration based on the secondary etching depth of each etched residual dividing strip.

6. A system for segmenting FMM (Fiberglass Modulated Metal) sheets, characterized in that, The system includes an image acquisition unit, an etch residue segment identification unit, and an etching execution unit. The image acquisition unit uses a camera and a ring light source to acquire an etched front image of the FMM board after the initial etching, before the protective film on the back is removed. It then extracts the true contours and grayscale images of each segment from the etched front image. The etch residue segment identification unit compares each grayscale image with a standard grayscale image of the fully etched segment to identify whether each segment is an etch residue segment. It performs grayscale value analysis on the grayscale images of each etch residue segment to obtain corresponding secondary etching parameters, and outputs the coordinate ranges and corresponding secondary etching parameters of all etch residue segment segments to the etching execution unit. The etching execution unit includes a vision system, a precision spraying mechanism, and an etching nozzle. The vision system captures the contour image of the non-etched area on the etched front of the FMM board, combines it with the coordinate ranges and secondary etching parameters of each etch residue segment, and controls the precision spraying mechanism and etching nozzle to perform secondary etching on the etch residue segment segments to prevent damage to the product units on the FMM board when the protective film is removed.

7. The system as described in claim 6, characterized in that, The image acquisition unit also includes a polarizing filter; the polarizing filter converts the light emitted by the ring light source into linearly polarized light that is incident on the etched front side of the FMM board; the camera obtains an image of the etched front side of the FMM board by capturing the reflected light of the linearly polarized light on the etched front side of the FMM board.

8. The system as described in claim 6, characterized in that, The vision system controls the precision spraying mechanism and etching nozzle to perform secondary etching on the etched residual dividing strips, including: calculating the corresponding obstacle avoidance spraying area based on the contour image of the non-etched area on the etched front of the FMM board and the coordinate range of each etched residual dividing strip; the obstacle avoidance spraying area covers the corresponding product unit area on the etched front of the FMM board and extends beyond the edge of the corresponding product unit area by several micrometers; based on the corresponding obstacle avoidance spraying area, controlling the precision spraying mechanism to perform protective spraying on the non-etched area on the etched front of the FMM board; after the spraying is completed, controlling the etching nozzle to complete the secondary etching of all etched residual dividing strips according to the secondary etching parameters corresponding to each etched residual dividing strip.

9. The system as described in any one of claims 6-8, characterized in that, The etching residue segmentation bar identification unit identifies whether each segmentation bar is an etching residue segmentation bar, including: identifying all positions where the etching depth of each segmentation bar is insufficient by referring to a standard grayscale image of the segmentation bar being fully etched, as the initial screening positions; calculating the percentage of the total area of ​​the initial screening positions of each segmentation bar to the area of ​​the corresponding segmentation bar; if the percentage exceeds a preset threshold, the corresponding segmentation bar is determined to be an etching residue segmentation bar.

10. The system as described in claim 9, characterized in that, The etching residue segmentation identification unit performs grayscale value analysis on the grayscale image of each etching residue segmentation to obtain the corresponding secondary etching parameters, including: determining the secondary etching depth of the corresponding etching residue segmentation based on the thickness of the FMM board and the pre-established correspondence between grayscale value and etching depth; and obtaining the secondary etching duration based on the secondary etching depth of each etching residue segmentation.

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