CN111912759A - Method for testing air permeability of waterproof breathable film - Google Patents
Method for testing air permeability of waterproof breathable film Download PDFInfo
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- CN111912759A CN111912759A CN202010681301.0A CN202010681301A CN111912759A CN 111912759 A CN111912759 A CN 111912759A CN 202010681301 A CN202010681301 A CN 202010681301A CN 111912759 A CN111912759 A CN 111912759A
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- 230000035699 permeability Effects 0.000 title claims abstract description 58
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- 238000001514 detection method Methods 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 230000007547 defect Effects 0.000 claims abstract description 22
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- 238000009423 ventilation Methods 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 230000002950 deficient Effects 0.000 claims description 28
- 230000006378 damage Effects 0.000 claims description 16
- 239000003292 glue Substances 0.000 claims description 14
- 238000007689 inspection Methods 0.000 claims description 10
- 239000002390 adhesive tape Substances 0.000 claims description 9
- 238000013135 deep learning Methods 0.000 claims description 8
- 238000010998 test method Methods 0.000 claims description 8
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- 230000000007 visual effect Effects 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
Abstract
The invention provides a method for testing the air permeability of a waterproof breathable film, which comprises the following steps: the waterproof breathable film raw material is subjected to sample making to obtain a waterproof breathable film sample finished product, a certain number of sample finished products are subjected to ventilation test to obtain a ventilation average value, and a ventilation standard value of the waterproof breathable film is obtained through conversion; manufacturing a finished waterproof breathable film, and obtaining an actual area value of the finished waterproof breathable film through machine vision detection equipment; obtaining the actual air permeability of the product through conversion according to the air permeability standard value and the actual area value of the finished waterproof air-permeable membrane; and comparing the obtained actual air permeability with a preset upper limit value and a preset lower limit value to judge whether the air permeability of the product is qualified. The invention can complete the air permeability test with low cost and high efficiency and other defect tests such as flatness and the like.
Description
Technical Field
The invention belongs to the technical field of die cutting tests, and particularly relates to a method for detecting flatness, air permeability, waterproofness and product marking in the defect detection of a waterproof breathable film.
Background
With the progress of science and technology, brand manufacturers continuously improve the protection of consumer electronic products, and particularly the water resistance is the most important. The average flatness is about 10 micrometers, and sensors such as 3D cameras on the market cannot meet the requirements and cannot meet the flatness test requirements of waterproof breathable films. Meanwhile, the traditional method is high in cost and cannot test the project at low cost. The flatness problem can seriously affect the acoustic effect of the waterproof breathable film, and a method for testing the flatness at low cost and high precision is urgently needed in a use section.
In waterproof ventilated membrane processing field, the detection of product adopts the mode of manual work + magnifying glass always, and unable accurate inspection product microdefect, it is efficient, with high costs, and the ventilative volume and the waterproof nature problem of waterproof ventilated membrane itself can't be reacted.
However, when the mobile phone terminal is assembled, the air permeability and the water resistance cause troubles to the assembly process. This is an urgent need for the waterproof breathable film to be subjected to full inspection at the time of shipment, and for the air permeation amount and the waterproof property to be confirmed.
Waterproof ventilated membrane test field, the waterproof nature and the ventilative volume test of product need special machinery to test always, and the process of test need laminate on the tool, has carried out destruction to the product like this. Meanwhile, the testing efficiency is not high, and a certain method is urgently needed to evaluate the waterproofness and the air permeability of the waterproof and breathable film product.
Disclosure of Invention
In view of the above, the present invention is directed to a method for testing flatness, air permeability and water resistance of a waterproof breathable film, so as to test water resistance and air permeability without destructive testing.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in a first aspect, the invention provides a flatness testing method for a waterproof breathable film, which comprises the following steps:
1. acquiring a finished product image of the waterproof breathable film sample by using machine vision detection equipment;
2. the high-dimensional characteristics of good products and defective products are learned through a deep learning method, and after training and memorizing the characteristics of the defective products, whether the defective products are good products or not is judged.
In a second aspect, the invention provides a method for testing the air permeability of a waterproof breathable film, which comprises the following steps:
1. determining that the raw materials of the waterproof breathable film have good consistency;
2. the waterproof breathable film raw material is subjected to sample making to obtain a waterproof breathable film sample finished product, a certain number of sample finished products are subjected to ventilation test to obtain a ventilation average value, and a ventilation standard value of the waterproof breathable film is obtained through conversion;
3. manufacturing a finished waterproof breathable film, and obtaining an actual area value of the finished waterproof breathable film through machine vision detection equipment;
4. obtaining the actual air permeability of the product through conversion according to the air permeability standard value and the actual area value of the finished waterproof air-permeable membrane;
5. and comparing the obtained actual air permeability with a preset upper limit value and a preset lower limit value to judge whether the air permeability of the product is qualified.
Further, step 5 is followed by the steps of:
6. inspecting the defects of foreign matters, damage and folds of the finished waterproof breathable film by machine vision detection equipment, and outputting a judgment result; the specific test method is as follows:
acquiring finished product images of waterproof breathable film samples through machine vision detection equipment, learning high-dimensional characteristics of good products and defective products through a deep learning method, and judging whether the samples are good products or not after training and memorizing the characteristics of the defective products;
7. and combining the test result of the air permeability and the test results of the foreign matters, the breakage and the wrinkle defects to obtain an equivalent conclusion of the air permeability of the waterproof breathable film.
In a third aspect, the invention provides a waterproof test method for a waterproof breathable film, which comprises the following steps:
1. determining that the raw materials of the waterproof breathable film and the double-sided adhesive tape are good in consistency;
2. obtaining a glue ring area value of the waterproof double-sided adhesive tape on the waterproof breathable film and a width value of the minimum size position of the glue ring through machine vision detection equipment;
3. and comparing the area value and the width value with preset corresponding upper and lower limit values respectively, and outputting a judgment result.
Further, step 3 is followed by the steps of:
4. inspecting the defects of foreign matters, damage and folds of the finished waterproof breathable film by machine vision detection equipment, and outputting a judgment result; the specific test method is as follows:
acquiring finished product images of waterproof breathable film samples through machine vision detection equipment, learning high-dimensional characteristics of good products and defective products through a deep learning method, and judging whether the samples are good products or not after training and memorizing the characteristics of the defective products;
5. and combining a rubber ring test result and a defect inspection result of foreign matters, damage and folds to obtain an equivalent conclusion of the waterproofness of the waterproof breathable film.
The flatness, air permeability and waterproofness testing method for the waterproof breathable film provided by the invention is used for completing the method for testing the flatness, air permeability and waterproofness at low cost and high precision by mutually matching the light source system and the camera system, thereby providing a detection mechanism for manufacturing a special suggestive failure risk and ensuring the quality effect of product shipment.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an overall structural diagram of a machine vision inspection apparatus according to an embodiment of the present invention;
FIG. 2 is a block diagram of a detection mechanism according to an embodiment of the present invention;
FIG. 3 is a block diagram of a strip light source system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of typesetting for rectangular products according to an embodiment of the invention;
FIG. 5 is a schematic diagram of typesetting for circular products according to an embodiment of the invention;
FIG. 6 is a schematic diagram of triangulation according to an embodiment of the present invention;
FIG. 7 is a view showing the ventilation area of a circular product according to an embodiment of the present invention;
FIG. 8 is a schematic view of a ventilation area of a square product according to an embodiment of the present invention;
FIG. 9 is a schematic view of a rectangular product showing the ventilation zone according to the embodiment of the present invention;
FIG. 10 is a view showing a waterproof glue area of a circular product according to an embodiment of the present invention;
FIG. 11 is a view showing a waterproof glue area of a square product according to an embodiment of the present invention;
FIG. 12 is a view showing a waterproof glue area of a rectangular product according to an embodiment of the present invention;
FIG. 13 is a logic flow diagram of a camera system according to an embodiment of the present invention;
FIG. 14 is a flowchart of a camera object loading routine of the camera system according to an embodiment of the present invention;
FIG. 15 is a flowchart of an unload camera object procedure for a camera system according to an embodiment of the present invention;
fig. 16 is a flowchart illustrating capturing an object by loading a data stream of a camera system according to an embodiment of the present invention;
fig. 17 is a flowchart illustrating an unloading data stream grabbing process of a camera system according to an embodiment of the present invention;
fig. 18 is a flow chart of a single frame or continuous snap of a camera system according to an embodiment of the invention.
Description of reference numerals:
1-detection mechanism, 2-protective cover, 3-supporting cabinet, 4-camera fine adjustment mechanism, 5-camera system, 6-code spraying mechanism, 7-side light source bracket, 8-bar light source system, 9-backlight source and positioning mechanism, 10-X direction movement module, 11-Y direction movement module, 12-angle adjustment bracket, 13-supporting bracket, 14-bar light source, 15-positioning position, 16-adsorption region, 17-region backlight region, 18-light source, 19-focusing lens, 20-measured surface, 21-imaging objective lens, 22-camera, 23-breathable surface, 24-waterproof breathable film, 25-adhesive, 26-PET and 27-waterproof adhesive surface.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The testing principle of the invention is based on the principle of triangulation, as shown in fig. 6, comprising a light source 18, a focusing lens 19, a surface to be tested 20, an imaging objective lens 21 and a COMS or CCD camera 22; a light source 18 irradiates a measured surface 20 through a focusing lens 19, and a camera 22 collects reflected light of the irradiated light through an imaging objective lens 21; the method for testing the flatness at low cost and high precision is completed by matching the side light source design with the testing program, a failure risk detection mechanism is provided for manufacturing, and the quality effect of product shipment is ensured.
The machine vision detection equipment for the waterproof breathable film test comprises a detection mechanism 1, a protective cover 2 and a supporting cabinet 3, wherein the detection mechanism 1 is arranged at the center of the upper surface of the supporting cabinet 3, and the protective cover 2 is arranged on the outer side of the detection mechanism 1;
as shown in fig. 2, the detection mechanism 1 includes a support frame, a camera fine-tuning mechanism 4, a camera system 5, a code spraying mechanism 6, a side light source bracket 7, a bar light source system 8, a backlight source and positioning mechanism 9, an X-direction movement module 10, and a Y-direction movement module 11; the supporting frame comprises a base and a side pillar arranged on the base, a supporting beam is arranged at the top of the side pillar, the Y-direction movement module 11 is fixedly arranged on the base, the X-direction movement module 10 is arranged on the Y-direction movement module 11 in a sliding mode, and the backlight source and positioning mechanism 9 is arranged on the upper portion of the X-direction movement module 10 through a test fixture; the camera system 5 is installed on the supporting beam through the camera fine adjustment mechanism 4, and the code spraying mechanism 6 is also fixedly installed on the supporting beam; the strip-shaped light source system 8 is arranged at the lower part of the supporting beam through a side light source bracket 7. Realize the roughness to waterproof ventilated membrane product through this check out test set, ventilative volume, waterproof nature's test is spouted a yard mark simultaneously.
The X-direction movement module 10 and the Y-direction movement module 11 drive the test fixture to move to a set position, the backlight source and the positioning mechanism 9 and the strip light source system 8 are used for testing, the flatness of a product is projected through the strip light source, the flatness is tested, and other bad tests are carried out through the cooperation of the backlight source and the camera. The detected defective products are subjected to code spraying and marking operation by a code spraying mechanism 6. The camera fine adjustment mechanism 4 is used for adjusting the height of the camera to obtain a clear photographing effect.
The bar light source system 8 comprises an angle adjusting bracket 12, a supporting bracket 13 and a bar light source 14, as shown in fig. 3, the supporting bracket 13 provides a high upper support for the bar light source, and the angle adjusting bracket 12 is used for adjusting the light angle of the bar light source 14 to the product, so as to obtain the optimal light incident angle suitable for the product.
The code spraying mechanism 6 is designed adjacent to the camera, and the code spraying machine is arranged in time to print codes after recognition is completed. If the product material permits, the marking mode can also be marked by a laser mode or a mechanical mode marking pen mode.
The invention completes the method for testing the flatness with low cost and high precision by matching the design of the light source system with the testing program, provides a detection mechanism for the failure risk of manufacturing and ensures the quality effect of product shipment.
The strip-shaped light source system 8 of the embodiment is a strip-shaped side surface light source matched with the waterproof breathable film, the emergent angle and the intensity of light are designed by the side surface light source, the incident angle of the side surface light source and a product is from 0.5 degree to 10 degrees, meanwhile, the scattering angle of the light source is not more than 5 degrees, and meanwhile, the illumination uniformity in the product range is ensured; different incident angles are used according to different product lamination and assembly structures, and the matching is specifically carried out according to the product structure.
The camera of the camera system 5 of the embodiment uses a camera with a resolution of 200 to 3000 ten thousand pixels, which is specifically determined according to the size of the product layout and the required precision, and the camera pixels are 200 to 3000 ten thousand pixels.
After an image is obtained through a camera, the method is combined with blob processing, Fourier transformation, inverse Fourier transformation and Gaussian filtering, the method is combined, the limitation and the error rate of the single method are eliminated, and the conclusion that the error rate is minimum is synthesized.
Or a deep learning method is used for learning the high-dimensional characteristics of good products and defective products, the training is carried out on products with the number of 200-100000 pcs, the bad characteristics are memorized by the deep learning, and then the flatness condition is judged.
The method for testing the air permeability provided by the embodiment comprises the following steps:
the method comprises the following steps: in the raw material supply stage, a raw material supplier and IQC inspect the waterproof breathable film raw material and ensure that the consistency is good;
step two: and (3) making the qualified product of the IQC inspection into a waterproof breathable film sample finished product through proofing, and testing the air permeability of a certain number of sample finished products, wherein the testing number is not less than 31 pcs. Obtaining an average value of the air permeability of the waterproof breathable film after the test is finished, and obtaining an air permeability standard value of the waterproof breathable film through conversion;
step three: and (3) manufacturing a waterproof breathable film finished product according to a drawing, and testing on machine vision detection equipment after the finished product is finished. Firstly, inputting a standard value of the air permeability of the raw material on a system. The equipment is provided with a patented waterproof breathable membrane area testing module, and the actual area is tested to obtain the breathable area value of a finished product;
step four: the air permeability standard value of the material and the air permeability area value of the finished product are integrated, the actual air permeability of the product is obtained through conversion, the air permeability value is compared with the upper limit and the lower limit which are set in advance, and the conclusion whether the air permeability of the product is OK is obtained and output;
the conversion process is as follows:
step five: testing the finished product for defects such as foreign matters, damage and the like, and outputting a test result;
step six: the method is a numerical value test result of the air permeability, a foreign matter and damage defect test result, and an equivalent conclusion of testing the air permeability of the waterproof breathable film is obtained by integrating the obtained results.
The reasoning process of the air permeability testing method comprises the following steps: the raw materials of the waterproof breathable film have no problem through incoming material inspection, and the consistency is ensured; the product finished product is tested to confirm that the defects of foreign matters, damage and the like which influence the air permeability of the product are poor, and no problem exists after the test; the positive correlation factor of the air permeability of the product is tested at this time: the area of the breathable area of the waterproof breathable film is combined with the unit area breathable amount and the breathable area numerical value of the raw material, and the actual breathable amount of the product is obtained through conversion; and comparing the obtained air permeability value with the upper limit and the lower limit set by the air permeability to obtain the conclusion whether the product is OK or not.
The waterproof test method provided in this embodiment is as follows:
the method comprises the following steps: in the raw material supply stage, a raw material supplier and IQC check the waterproof breathable film and the waterproof double-sided adhesive raw material and ensure good consistency;
step two: placing the rubber ring of the waterproof double-sided adhesive tape on a machine vision detection defect device to test the area of the rubber ring and the size of the minimum size position of the rubber ring, comparing the two data with an upper limit value and a lower limit value, and outputting a judgment result;
step three: putting the finished waterproof breathable film on machine vision detection equipment to detect foreign matters, damages and wrinkle defects, and outputting a judgment result;
step four: and combining a rubber ring test result and a defect inspection result of foreign matters, damage, folds and the like to obtain an equivalent conclusion of the waterproofness of the waterproof breathable film.
The reasoning process of the waterproof test method comprises the following steps: the water resistance of the finished product has 3 factors: 1 whether the waterproof breathable film and the waterproof adhesive form a closed area is complete, 2, the waterproof capacity of the waterproof breathable film, and 3, the width of the waterproof double-sided adhesive. After the waterproof breathable film is shaped, the waterproof capability of the waterproof breathable film is determined to meet the requirement, and the rest two factors need to be confirmed on the product. The area and the minimum position width of the waterproof double-sided adhesive tape are two angles of the double-sided adhesive tape influencing the waterproof capability, the two numerical values can be obtained through the test of a visual detection system, and the two numerical values are compared with the set upper limit and the set lower limit to obtain the conclusion whether the size of the waterproof adhesive tape is OK or not. Whether the waterproof breathable film and the waterproof adhesive form a closed area is complete or not is tested through an appearance detection program of visual detection, and the test items are foreign matters of the waterproof breathable film and the waterproof double-sided adhesive, damage and poor wrinkles. The waterproof glue size is OK, the bad project test has no problem, and the waterproof performance of the product is determined to be OK.
The marking method proposed by the embodiment is as follows:
identification: and comparing the tested parameter value with the set upper and lower limits of the parameter with the checked data, judging whether the data is OK or NG, and recording in the system.
And (3) screen output: when the system software detects a defective product, the present embodiment uses red and green frames for selection through screen display to distinguish a good product from a defective product, where the red frame represents a defective product, and the green frame represents a good product.
Marking: and (3) spraying red marks by using an ink-jet printer to carry out code spraying and marking on the middle functional film part of the waterproof breathable film, wherein the marked patterns are determined according to the product, when the middle functional part of the product is large in area, the middle functional part of the product is marked by a lower-case 'o' or a dot ', and when the middle functional part of the product is small in area, the middle functional part of the product is marked by a lower-case' x 'or a dot'.
Positioning a mark: in the acquisition of the relative position of the markers. Positioning a product to be marked in a camera system, inputting estimated displacements in X and Y directions, inputting X-direction displacement X1 and Y-direction displacement Y1, viewing an actual effect, revising displacement values in the X and Y directions to be X2/Y2 respectively according to the actual effect, viewing a code spraying actual effect … … until the code spraying effect is OK, recording final position values X0 and Y0 needing to be finally displaced, and then, the displacement values needed by the code spraying corresponding to the equipment are all X0/Y0.
The defective product treatment method of the invention: the defective products can be treated in a mode of 1, replacing the defective products manually; 2, replacing the defective product by the manipulator; 3, manually removing defective products; 4, the defective products are not processed, and the marked products are ignored during the later assembly.
The machine vision detection equipment for the waterproof breathable film test comprises the following working processes:
according to the lamination structure and the precision requirement of a product to be detected, cameras with different resolutions are selected to be matched with the lens, a proper backlight source and a proper strip-shaped light source 14 are selected, the backlight source and the positioning mechanism form a front image acquisition light source together, and a dome light source or a coaxial light source can also be adopted. The strip light source system 8 and the camera keep the same position, the X-direction movement module 10 and the Y-direction movement module 11 adjust the product position, and the effect of the strip light source 14 and the relative position of the camera are guaranteed to be unchanged, so that the bad test of the flatness is guaranteed to be in the same environment. The adjustment bracket 12, which implements three angular adjustments, ensures that several strip-shaped light sources 14 maintain the same angle of incidence. The camera fine adjustment mechanism 4 adjusts the camera and the lens to the clearest position of the image.
Aiming at a product to be tested, product parameters including a full size and tolerance range, a stepping distance, testing times, appearance detection defect precision, burr parameter setting, flatness parameter setting and a cpk data acquisition interval are configured after a graph is acquired.
After the parameter configuration is completed, the product testing is started. The product is placed on a product positioning mechanism, a test program is started, the X-direction movement module 10 and the Y-direction movement module 11 push the product to a first photographing position to start testing, after the number n of the set products is tested, the ink-jet printer spray head 6 marks the defective products, then the next position is started to test the next n products, the defective products are sprayed with the code marks, and the steps are sequentially circulated until all the products are tested and the code marks are sprayed.
And finally, the code spraying machine marks a product batch number on the piece of product, wherein the batch number information comprises: item code, item version, detection date and batch number corresponding to the current day.
The whole implementation process of the invention is as follows:
in the method for testing the air permeability, in the raw material supply stage, a raw material supplier and IQC are used for testing the waterproof air permeable membrane raw material and ensuring the good consistency of the waterproof air permeable membrane raw material; products qualified by IQC inspection are made into waterproof breathable film sample finished products through proofing, the finished product typesetting in the embodiment of the invention is shown in figures 4 and 5, wherein the figures comprise a positioning position 15, blank adsorption areas 16 at two sides and an area back light area 17, and the area back light area can irradiate 90 x 40; respectively performing rectangular typesetting and circular typesetting; and (4) testing the air permeability of a certain amount of sample finished products, wherein the testing amount is not less than 21 pcs. Obtaining an average value of the air permeability of the waterproof breathable film after the test is finished, and obtaining an air permeability standard value of the waterproof breathable film through conversion;
and (4) manufacturing a finished waterproof breathable film product according to a customer drawing, and testing on machine vision detection equipment after the finished product is finished. Firstly, inputting a standard value of the air permeability of the raw material on a system. The equipment is provided with a waterproof breathable membrane area testing module, and the actual area is tested to obtain the breathable area value of the finished product; the air permeability standard value of the material and the air permeability area value of the finished product are integrated, the actual air permeability of the product is obtained through conversion, the air permeability value is compared with the upper limit and the lower limit which are set in advance, and the conclusion whether the air permeability of the product is OK is obtained and output; testing the finished product for defects such as foreign matters, damage and the like, and outputting a test result; the method integrates the test results of the air permeability numerical value and the test results of the defects such as foreign matters, breakage and the like, and the obtained results are equivalent conclusions of the air permeability of the waterproof breathable film;
as shown in fig. 7, 8 and 9, the air-permeable surfaces of round, square and rectangular products are respectively shown in schematic form, the middle part is an air-permeable surface 23, and the layered structure sequentially comprises glue 25, a waterproof air-permeable film 24, glue 25 and PET 26.
Waterproof test method:
in the raw material supply stage, a raw material supplier and IQC check the waterproof breathable film and the waterproof double-sided adhesive raw material and ensure good consistency; placing the rubber ring of the waterproof double-sided adhesive tape on a machine vision detection defect device to test the area of the rubber ring and the size of the minimum size position of the rubber ring, comparing the two numerical values with an upper limit value and a lower limit value, and outputting a judgment result; putting the finished waterproof breathable film on machine vision equipment, detecting the defects of foreign matters, damage, folds and the like by using detection equipment, and outputting a judgment result; combining with the test result of the rubber ring and the inspection result of the bad defects such as foreign matters, damage, folds and the like to obtain the equivalent conclusion of the waterproofness of the waterproof breathable film
As shown in fig. 10, fig. 11 and fig. 12, the waterproof glue forms of round, square and rectangular products are respectively shown, the middle part is a waterproof glue surface 27, and the layered structure sequentially comprises glue 25, a waterproof breathable film 24, glue 25 and PET 26.
And (3) marking:
the camera system 5 is matched with the equipment support and the bar-shaped light source system 8 to acquire images of the product, analyze and judge the images, and adjust the camera fine adjustment mechanism 4 when the images are not clear. And comparing the obtained parameter value with the set upper and lower parameter limits through processing the image to obtain a test conclusion that the product is OK or NG, outputting a result on a screen, displaying a complete picture of each product, and performing frame selection by using a square frame, wherein the red frame represents the product NG, and the green frame represents the product OK.
Obtaining the relative position of a mark, positioning a product to be marked in a camera system, inputting estimated displacement in X and Y directions, X1 displacement in the X direction and Y1 displacement in the Y direction, modifying the displacement values in the X and Y directions to be X2/Y2 according to the actual effect, spraying the code to the actual effect … … until the code spraying effect is OK, recording final position values X0 and Y0 which are finally needed to be cheap, and then, the cheap values needed by the code spraying corresponding to the equipment are all X0/Y0.
After each detection is finished, the code spraying machine mechanism 6 is used for spraying code marks on the defective products, the mark color is red, and the mark patterns are selected: functional part large area products are labeled with lower case "o" and functional part small area products are labeled with lower case "x".
Program logic:
for the camera system 5, common programming employs three objects-a camera object, an acquisition object, a parameter object:
a camera object: and the camera is responsible for connecting, disconnecting and the like of the camera.
Acquiring an object: and the system is responsible for acquisition queue distribution of the camera, single-frame and continuous acquisition of the camera.
The parameter object is: is responsible for setting camera parameters.
Generally, the functions of three objects are combined into a "camera object", otherwise, the functions are divided into three objects, and in fact, an acquisition object and a parameter object are packaged on the "camera object".
The overall logic flow is shown in fig. 13, the load camera object program flow is shown in fig. 14, the unload camera object program flow is shown in fig. 15, the load data stream object grabbing flow is shown in fig. 16, the unload data stream object grabbing flow is shown in fig. 17, and the single frame or continuous object grabbing process is shown in fig. 18.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The flatness testing method of the waterproof breathable film is characterized by comprising the following steps of:
1) acquiring a finished product image of the waterproof breathable film sample by using machine vision detection equipment;
2) the high-dimensional characteristics of good products and defective products are learned through a deep learning method, and after training and memorizing the characteristics of the defective products, whether the defective products are good products or not is judged.
2. The method for testing the air permeability of the waterproof breathable film is characterized by comprising the following steps of:
1) determining that the raw materials of the waterproof breathable film have good consistency;
2) the waterproof breathable film raw material is subjected to sample making to obtain a waterproof breathable film sample finished product, a certain number of sample finished products are subjected to ventilation test to obtain a ventilation average value, and a ventilation standard value of the waterproof breathable film is obtained through conversion;
3) manufacturing a finished waterproof breathable film, and obtaining an actual area value of the finished waterproof breathable film through machine vision detection equipment;
4) obtaining the actual air permeability of the product through conversion according to the air permeability standard value and the actual area value of the finished waterproof air-permeable membrane;
5) and comparing the obtained actual air permeability with a preset upper limit value and a preset lower limit value to judge whether the air permeability of the product is qualified.
3. The method of claim 1, wherein: the following steps are also included after the step 5:
6) inspecting the defects of foreign matters, damage and folds of the finished waterproof breathable film by machine vision detection equipment, and outputting a judgment result; the specific test method is as follows:
acquiring finished product images of waterproof breathable film samples through machine vision detection equipment, learning high-dimensional characteristics of good products and defective products through a deep learning method, and judging whether the samples are good products or not after training and memorizing the characteristics of the defective products;
7) and combining the test result of the air permeability and the test results of the foreign matters, the breakage and the wrinkle defects to obtain an equivalent conclusion of the air permeability of the waterproof breathable film.
4. A method for testing the waterproofness of a waterproof breathable film is characterized by comprising the following steps:
1) determining that the raw materials of the waterproof breathable film and the double-sided adhesive tape are good in consistency;
2) obtaining a glue ring area value of the waterproof double-sided adhesive tape on the waterproof breathable film and a width value of the minimum size position of the glue ring through machine vision detection equipment;
3) and comparing the area value and the width value with preset corresponding upper and lower limit values respectively, and outputting a judgment result.
5. The method of claim 4, wherein: the following steps are also included after the step 3:
4) inspecting the defects of foreign matters, damage and folds of the finished waterproof breathable film by machine vision detection equipment, and outputting a judgment result; the specific test method is as follows:
acquiring finished product images of waterproof breathable film samples through machine vision detection equipment, learning high-dimensional characteristics of good products and defective products through a deep learning method, and judging whether the samples are good products or not after training and memorizing the characteristics of the defective products;
5) and combining a rubber ring test result and a defect inspection result of foreign matters, damage and folds to obtain an equivalent conclusion of the waterproofness of the waterproof breathable film.
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Application publication date: 20201110 |