CN211318237U - Waterproof ventilated membrane defect test equipment based on machine vision - Google Patents
Waterproof ventilated membrane defect test equipment based on machine vision Download PDFInfo
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Abstract
The utility model provides a waterproof ventilated membrane defect test equipment based on machine vision, including detection device and host computer, the detection device bottom is equipped with the base, base one side installation support skeleton, support skeleton top installation camera fine setting module, install the camera on the camera fine setting module, XY linear guide is installed to the top of base, XY linear guide passes through tool installation light source in the top, the light source is located the below of camera lens, be equipped with between the camera lens of light source and camera and place the space of waiting to detect the membrane, the controller of camera, XY linear guide's X is to motor and the equal signal connection of Y to the motor to the host computer. Waterproof ventilated membrane defect test equipment based on machine vision, through light source and test procedure cooperation, accomplished low-cost high accuracy test roughness, effectively guarantee the quality of product shipment.
Description
Technical Field
The utility model belongs to cross cutting test field especially relates to a waterproof ventilated membrane defect test equipment based on machine vision.
Background
Along with the progress of science and technology, brand manufacturer constantly improves consumer electronics product protectiveness, and waterproof nature is especially important, and waterproof ventilated membrane raw and other materials are relatively soft when thin owing to the characteristic of itself, appear the problem of damage easily, appear the foreign matter easily in generation and course of working, damage, burr scheduling problem, make final product shipment can not obtain the guarantee. The price of the existing waterproof breathable film is higher than that of a common die-cutting product, the added value is higher, the absolute quality required by customers is higher, and the allowable bad space is very low.
Some devices in the current market can only test the size and cannot test other defects; some can test defects, but the precision is about 0.1mm, and the waterproof breathable film cannot be monitored and the state of the waterproof breathable film cannot be fed back. Therefore, the equipment capable of detecting the waterproof breathable film with high precision is urgently needed, the waterproof breathable film is subjected to full detection by 100%, the microscopic condition is fully known, the detected big data is analyzed and judged, and reference is provided for scheme design, material selection and manufacturing process. The waterproof breathable film is mainly high in waterproofness, and the raw materials of the waterproof breathable film are thin and soft due to the characteristics of the raw materials, so that the problems of wrinkling and the like easily occur in the generation and processing processes, and the flatness problem of a final product is caused. The average flatness is about 10 micrometers, the best tolerance of sensors such as a 3D camera and the like in the market is 10 micrometers, the error of Keynes is 100 micrometers, and the flatness test requirement of the waterproof breathable film cannot be met. 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.
Disclosure of Invention
In view of this, the utility model aims at providing a waterproof ventilated membrane defect test method based on machine vision to a waterproof ventilated membrane defect test method of low cost, high accuracy, effective guarantee product quality is provided.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a waterproof breathable film defect testing method based on machine vision comprises the following steps: placing the film to be detected between a light source and a camera, wherein the light source is positioned below the film to be detected, and the camera is positioned above the film to be detected;
step two: adjusting the incident angle of the light source and the film to be detected according to the lamination and assembly structure of different films to be detected, so that the light source is matched with the product structure;
step three: and shooting a real object image of the film to be detected by the camera to finish the flatness defect test, the full-size test and the appearance defect test of the film to be detected.
Further, the specific method for testing the flatness defect of the film to be detected comprises the following steps:
step 11: after the camera shoots a real object image, a controller of the camera performs Blob processing on the image;
step 12: the controller matches the position of the template set inside with the position of the existing membrane to be detected, so as to judge whether the position of the membrane to be detected is correct or not, the position is displayed through a screen, and when the position is incorrect, the position can be manually adjusted until the position of the membrane to be detected is correct (namely, product positioning);
step 13: the controller performs graph segmentation processing on the picture, and the processed graph performs Fourier transform again to realize the transformation from the time domain to the frequency domain of the image data;
step 14: the controller performs Gaussian processing on the frequency domain of the picture in the step 13;
step 15: the controller performs inverse fourier transform on the picture in the step 14;
step 16: the controller compares the picture in the step 15 with the original picture to obtain an uneven area;
and step 17: the controller performs time domain linear Gaussian processing on the uneven area in the step 16 to filter interference factors;
step 18: and outputting the judgment result and the graph.
Further, the specific method for full-scale testing of the membrane to be detected comprises the following steps:
step 21: after the camera shoots a real object image, a controller of the camera performs Blob processing on the image;
step 22: the controller matches the position of the template set inside with the position of the existing membrane to be detected, so as to judge whether the position of the membrane to be detected is correct or not, the position is displayed through a screen, and when the position is incorrect, the position can be manually adjusted until the position of the membrane to be detected is correct;
step 23: a controller of the camera judges the gray boundary of the picture;
step 24: the controller performs a pixel interpolation algorithm on the picture in the step 23, so as to accurately draw a boundary line;
step 25: the controller performs a secondary pixel interpolation algorithm on the picture in the step 24, so that the boundary line of the picture is drawn more accurately;
step 26: the controller performs two-dimensional analysis geometric processing on the picture in the step 25, and compares the processed data with a standard value stored in the controller;
step 27: the controller obtains a size conclusion and outputs the conclusion.
Further, the specific method for the appearance defect test comprises the following steps:
step 31: shooting a real object image by a camera;
step 32: the controller of the camera carries out filtering processing on the picture in the step 31;
step 33: the controller compares the picture in the step 32 with the picture in the step 31 to find out the part with poor appearance;
step 34: the controller extracts the characteristics of the part with poor appearance;
step 35: the controller compares the bad characteristics in the step 34 with standard data stored in the controller, and outputs a conclusion;
step 36: the camera outputs a summary of appearance conditions.
Compared with the prior art, waterproof ventilated membrane defect test method based on machine vision has following advantage:
(1) waterproof ventilated membrane defect test method based on machine vision, through light source and test procedure cooperation, accomplished low-cost high accuracy test roughness, effectively guarantee the quality of product shipment.
(2) Waterproof ventilated membrane defect test method based on machine vision, according to the product characteristic of difference, use different light sources and light source combination, the commonality is strong.
(3) Waterproof ventilated membrane defect test method based on machine vision, the scattering angle of side surface source is no more than 5, effectively guarantees the illumination degree of consistency in the product range.
Another aim at provides a waterproof ventilated membrane defect test equipment based on machine vision to a low cost, high accuracy, effective waterproof ventilated membrane defect test equipment who ensures product quality.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the utility model provides a waterproof ventilated membrane defect test equipment based on machine vision, includes detection device and host computer, and the detection device bottom is equipped with the base, base one side installation supporting framework, and supporting framework top installation camera, tool installation light source are passed through to the top of base, and the light source is located the below of camera lens, is equipped with the space of placing the membrane of waiting to detect between the camera lens of light source and camera, and the controller signal connection of camera is to the host computer.
Further, the light source is the combination of side face light source and backlight, and the tool upper surface is equipped with the sheet locating area, and the below in sheet locating area is equipped with the optical glass groove, and the both sides in optical glass groove are equipped with a plurality of absorption trompils, and every adsorbs the trompil respectively with the vacuum extraction opening that the tool side set up, the direct absorption sheet extraction opening intercommunication that the tool upper surface set up, the backlight is installed to the below in optical glass groove, and a side face light source is installed respectively to the side top in sheet locating area.
Further, the side surface light source is a strip-shaped side surface light source or an annular side surface light source.
Furthermore, one side of the jig is provided with a feeding device, the other side of the jig is provided with a receiving device, the feeding device and the receiving device are respectively provided with a conveying belt or a conveying wheel or a conveying track, a feeding motor in the feeding device is connected to an upper computer in a signal mode, and a receiving motor in the receiving device is connected to the upper computer in a signal mode.
Further, the host computer is the computer, and the computer is signal connection to keyboard and mouse respectively, and detection device, host computer, keyboard and mouse are all installed on the workstation, and the workstation below is equipped with the work cabinet, and the detection device outside is equipped with shell structure, and shell structure is last to be equipped with pay-off mouth, material receiving mouth and viewing aperture, and the pay-off mouth corresponds the setting with material feeding unit, and material receiving mouth and material receiving unit correspond the setting.
Compared with the prior art, waterproof ventilated membrane defect test equipment based on machine vision have following advantage:
(1) waterproof ventilated membrane defect test equipment based on machine vision, the XY linear guide and the camera fine setting module of setting to adjust the light source, wait to detect the position of membrane and camera, make the check out test set practicality stronger.
(2) Waterproof ventilated membrane defect test equipment based on machine vision, robot arm, material feeding unit and material collecting device of setting, degree of automation is high, provides the detection efficiency who detects the product greatly.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 shows the steps of flatness defect testing of a film to be tested according to an embodiment of the present invention;
FIG. 2 illustrates a full-scale testing procedure for a membrane to be tested according to an embodiment of the present invention;
FIG. 3 illustrates the steps of the appearance defect test according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a semi-automatic apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a fully automatic apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a detection device according to an embodiment of the present invention;
fig. 7 is a schematic structural view illustrating a configuration of a strip-shaped side surface light source and a backlight source according to an embodiment of the present invention;
fig. 8 is a schematic structural view illustrating a matching structure between an annular side light source and a backlight source according to an embodiment of the present invention;
fig. 9 is a top view of a jig according to an embodiment of the present invention;
fig. 10 is a side view of a jig according to an embodiment of the present invention.
Description of reference numerals:
1-a detection device; 2-an upper computer; 3-a keyboard; 4-mouse; 5-a workbench; 6-a work cabinet; 7-camera fine tuning module; 8-a camera; 9-a light source; 10-a sheet locating zone; 11-a jig; 12-XY linear guides; 13-a support skeleton; 14-a base; 15-a feeding device; 16-a material receiving device; 17-adsorption opening; 18-an optical glass tank; 19-a side light source; 20-a backlight source; 21-directly absorbing the sheet air extraction opening; 22-vacuum pumping hole; 23-positioning columns.
Detailed Description
It should be noted that, in the present invention, 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 the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 accompanying drawings in conjunction with embodiments.
The noun explains:
b, Blob treatment: namely, connected domain extraction and marking are carried out on the binary image after foreground/background separation.
A method for testing defects of a waterproof breathable film based on machine vision, as shown in figures 1 to 3, comprises
The method comprises the following steps: placing the film to be detected between a light source and a camera, wherein the light source is positioned below the film to be detected, and the camera is positioned above the film to be detected;
step two: adjusting the incident angle of the light source according to the lamination and assembly structures of different films to be detected, so that the light source is matched with the product structure;
step three: and shooting a real object image of the film to be detected by the camera to finish the flatness defect test, the full-size test and the appearance defect test of the film to be detected.
The camera is a CMOS industrial camera, the pixel resolution of the camera is changed according to the typesetting size of a product, and the pixel range of the camera is 200-3000 ten thousand pixels.
The light source is backlight, front lighting source, side light source or the above light sources.
For products with size and general appearance issues, backlights, and front illumination sources are used. The front lighting source includes a dome light, an on-axis light, an annular light, and the like. The backlight source is suitable for mechanical structures with uncomplicated structures or fields with high precision requirements of products. And a backlight source and a front lighting source can be simultaneously configured, so that the LED backlight source is suitable for the product field which has complex test requirements and can not be met by a single light source.
The side light source is mainly used for testing Z-direction defects of wrinkles and the like of products, and the incident angle of the light source ranges from-10 degrees to 50 degrees. The main function is to replace 3D camera systems at low cost, or situations where 3D systems cannot be tested.
The scattering angle of the side surface light source is not more than 5 degrees, and the illumination uniformity in the product range is effectively ensured.
The color of the side light source is a blue light source or a green light source.
The side surface light source is an annular side surface light source, a strip-shaped side surface light source or an oval side surface light source.
The method for testing the flatness defect of the film to be detected comprises the following specific steps:
step 11: after the camera shoots a real object image, a controller of the camera performs Blob processing on the image;
step 12: the controller matches the position of the template set inside with the position of the existing membrane to be detected, so as to judge whether the position of the membrane to be detected is correct or not, the position is displayed through a screen, and when the position is incorrect, the position can be manually adjusted until the position of the membrane to be detected is correct (namely, product positioning);
step 13: the controller performs graph segmentation processing on the picture, and the processed graph performs Fourier transform again to realize the transformation from the time domain to the frequency domain of the image data;
step 14: the controller performs Gaussian processing on the frequency domain of the picture in the step 13;
step 15: the controller performs inverse fourier transform on the picture in the step 14;
step 16: the controller compares the picture in the step 15 with the original picture to obtain an uneven area;
and step 17: the controller performs time domain linear Gaussian processing on the uneven area in the step 16 to filter interference factors;
step 18: and outputting the judgment result and the graph.
The specific method for testing the full size of the membrane to be detected comprises the following steps:
step 21: after the camera shoots a real object image, a controller of the camera performs Blob processing on the image;
step 22: the controller matches the position of the template set inside with the position of the existing membrane to be detected, so as to judge whether the position of the membrane to be detected is correct or not, the position is displayed through a screen, and when the position is incorrect, the position can be manually adjusted until the position of the membrane to be detected is correct (namely, product positioning);
step 23: a controller of the camera judges the gray boundary of the picture;
step 24: the controller performs a pixel interpolation algorithm (also called a caliper interpolation algorithm) on the picture in the step 23, so as to accurately draw a boundary line;
step 25: the controller performs a secondary pixel interpolation algorithm on the picture in the step 24, so that the boundary line of the picture is drawn more accurately;
step 26: the controller performs two-dimensional analysis geometric processing on the picture in the step 25, and compares the processed data with a standard value stored in the controller;
step 27: the controller obtains a size conclusion and outputs the conclusion.
The specific method for testing the appearance defects comprises the following steps:
step 31: shooting a real object image by a camera;
step 32: the controller of the camera carries out filtering processing on the picture in the step 31;
step 33: the controller compares the picture in the step 32 with the picture in the step 31 to find out the part with poor appearance;
step 34: the controller extracts the characteristics of the part with poor appearance;
step 35: the controller compares the bad characteristics in the step 34 with standard data stored in the controller, and outputs a conclusion;
step 36: the camera outputs a summary of appearance conditions.
The utility model provides a waterproof ventilated membrane defect test equipment based on machine vision, as shown in fig. 7 to 10, including detection device 1 and host computer 2, detection device 1 includes camera fine setting module 7, camera 8, light source 9, tool 11, XY linear guide 12, support skeleton 13, base 14, 14 one side installation support skeleton 13 of base, support skeleton 13 top installation camera fine setting module 7, install camera 8 on the camera fine setting module 7, XY linear guide 12 is installed to base 14's top, tool 11 installation light source 9 is passed through to XY linear guide 12 top, light source 9 is located the below of camera 8 camera lens, be equipped with the space of placing the membrane of waiting to detect between the camera lens of light source 9 and camera 8, camera 8's controller, the equal signal connection of X of XY linear guide 12 to motor and Y to host computer 2. And the XY linear guide rail 12 is adjusted according to actual conditions, so that the light source 9 and the position of the film to be detected are adjusted, and the practicability of the detection equipment is higher.
The camera fine-tuning module 7 is a line scanning camera adjusting module, can fine-tune the angle of the camera 8 according to different films to be detected, and is high in adaptability.
The light source 9 is a backlight, a front illumination light source, a side light source, or a combination of these.
The light source 9 is a combination of a side light source 19 and a backlight source 20, the jig 11 is of a rectangular structure, a sheet positioning area 10 is arranged on the upper surface of the jig, an optical glass groove 18 is arranged below the sheet positioning area 10, adsorption holes 17 are arranged on two sides of the optical glass groove 18, the adsorption holes 17 are respectively communicated with a vacuum pumping hole 22 formed in the side surface of the jig 11, a direct adsorption sheet pumping hole 21 formed in the upper surface of the jig 11 is communicated to form an adsorption channel, the direct adsorption sheet pumping hole 21 is externally connected with an adsorption machine, the adsorption machine is connected to the upper computer 2 through signals and used for adsorbing a film to be detected and simultaneously preventing the sheet from deforming to influence the test effect, the backlight source 20 is arranged below the optical glass groove 18, and a side light source 19 is respectively arranged above the side surface of the sheet positioning.
The edge of the sheet positioning area 10 is provided with a positioning column 23, so that a certain gap is formed between the positioning column 23 and a product to be detected, and the influence of the positioning column on a light source is reduced
The side light source 19 is a stripe-shaped side light source or an annular-shaped side light source.
A strip-shaped side surface light source is respectively arranged above any three sides of the sheet positioning area 10.
The upper computer 2 is a computer which is respectively connected with the keyboard 3 and the mouse 4 through signals, and operation is convenient.
One side of the jig 11 is provided with a feeding device 15, the other side of the jig is provided with a material receiving device 16, one end of the jig is provided with a robot arm, the feeding device 15 and the material receiving device 16 are respectively provided with a conveying belt or a conveying wheel or a conveying track, a feeding motor in the feeding device 15 is connected with the upper computer 2 in a signal mode, and a material receiving motor and the robot arm in the material receiving device 16 are connected with the upper computer 2 in a signal mode, so that the equipment is automatic equipment, and the working efficiency is greatly improved. To wait to detect the membrane and convey to tool 11 top through material feeding unit 15 to place in sheet locating area 10 through host computer 2 control robot arm, after the detection finishes, host computer 2 control robot arm will detect the membrane and place material collecting device 16 on, improved work efficiency greatly.
When equipment does not have loading attachment 15 and material collecting device 16, for semi-automatic equipment, the material loading all needs manual handling with receiving, when equipment fixing loading attachment 15 and material collecting device 16, for full-automatic equipment, now semi-automatic equipment is the example, explains, specifically as follows:
the working process of the equipment of the waterproof breathable film defect testing method based on machine vision is as follows:
the working personnel selects the cameras 8 with different resolutions according to the structure and the level of the film to be detected, selects the corresponding side light sources 9, places the film to be detected in the sheet positioning area 10, turns on the main switch of the device, the light sources 9 are electrified simultaneously, the cameras 8 take pictures of the film to be detected, the cameras 8 match the template positions set inside with the placement positions of the existing film to be detected, so as to judge whether the placement position of the film to be detected is correct, the placement position is displayed through a screen and displayed through a display screen of a computer, when the placement position is incorrect, the placement position can be manually adjusted until the position of the film to be detected is correct (namely product positioning), at the moment, the film to be detected directly adsorbs the sheet air suction opening 21, when the position of the film to be detected is correct, the controller of the cameras 8 sends a signal to the computer, the computer controls the adsorption machine to pass through the, and testing by adopting different testing methods according to actual requirements, finally transmitting the result to a computer, displaying or outputting the result through a computer screen, and taking away the membrane to be detected after the computer outputs the final result.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a waterproof ventilated membrane defect test equipment based on machine vision, its characterized in that: the film detection device comprises a detection device and an upper computer, wherein a base is arranged at the bottom of the detection device, a supporting framework is installed on one side of the base, a camera fine-tuning module is installed above the supporting framework, a camera is installed on the camera fine-tuning module, an XY linear guide rail is installed above the base, a light source is installed above the XY linear guide rail through a jig and is located below a camera lens, a space for placing a film to be detected is arranged between the light source and the camera lens, and a controller of the camera, and the X-direction motor and the Y-direction motor of the XY linear guide rail are in signal connection.
2. The machine vision-based waterproof breathable film defect testing device is characterized in that: the light source is the combination of side light source and backlight, and the tool upper surface is equipped with the sheet locating area, and the below in sheet locating area is equipped with the optical glass groove, and the both sides in optical glass groove are equipped with a plurality of absorption trompils, and every adsorbs the trompil respectively with the vacuum extraction opening that the tool side set up, the direct absorption sheet extraction opening intercommunication that the tool upper surface set up, the backlight is installed to the below in optical glass groove, and a side light source is installed respectively to the side top in sheet locating area.
3. The machine vision-based waterproof breathable film defect testing device is characterized in that: the side surface light source is a strip-shaped side surface light source or an annular side surface light source.
4. The machine vision-based waterproof breathable film defect testing device is characterized in that: one side of the jig is provided with a feeding device, the other side of the jig is provided with a receiving device, the feeding device and the receiving device are both conveyor belts or conveying wheels or conveying tracks, a feeding motor in the feeding device is in signal connection with an upper computer, and a receiving motor in the receiving device is in signal connection with the upper computer.
5. The machine vision-based waterproof breathable film defect testing equipment is characterized in that: the host computer is the computer, and the computer is signal connection to keyboard and mouse respectively, and detection device, host computer, keyboard and mouse are all installed on the workstation, and the workstation below is equipped with the workstation, and the detection device outside is equipped with shell structure, and shell structure is last to be equipped with pay-off mouth, material receiving mouth and viewing aperture, and the pay-off mouth corresponds the setting with material feeding unit, and material receiving mouth and material receiving unit correspond the setting.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361395A (en) * | 2019-08-06 | 2019-10-22 | 天津日博工业技术有限公司 | A kind of waterproof ventilated membrane defect test method and apparatus based on machine vision |
| CN118010761A (en) * | 2024-04-02 | 2024-05-10 | 七海测量技术（深圳）有限公司 | Curved glass defect detection device and method based on machine vision |
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2019
- 2019-08-06 CN CN201921263194.9U patent/CN211318237U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361395A (en) * | 2019-08-06 | 2019-10-22 | 天津日博工业技术有限公司 | A kind of waterproof ventilated membrane defect test method and apparatus based on machine vision |
| CN118010761A (en) * | 2024-04-02 | 2024-05-10 | 七海测量技术（深圳）有限公司 | Curved glass defect detection device and method based on machine vision |
| CN118010761B (en) * | 2024-04-02 | 2024-06-21 | 七海测量技术（深圳）有限公司 | Curved glass defect detection device and method based on machine vision |
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