CN112452808A - Multi-camera transparent object defect detection system - Google Patents
Multi-camera transparent object defect detection system Download PDFInfo
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- CN112452808A CN112452808A CN202011256000.XA CN202011256000A CN112452808A CN 112452808 A CN112452808 A CN 112452808A CN 202011256000 A CN202011256000 A CN 202011256000A CN 112452808 A CN112452808 A CN 112452808A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
- B07C5/362—Separating or distributor mechanisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/13—Moving of cuvettes or solid samples to or from the investigating station
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/8422—Investigating thin films, e.g. matrix isolation method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/958—Inspecting transparent materials or objects, e.g. windscreens
Abstract
The invention provides a multi-camera transparent object defect detection system, which comprises a hardware part and a software part, wherein a special linear array camera and an area array camera mechanism are selected for taking the multi-camera transparent film optical cement defect detection system as an example, so that the Y-axis and Z-axis directions can be adjusted, and the detection defect types are increased; the transmission synchronous belt adopts a hollow design, so that the interference of a supporting object to the detection part of the middle colloid is effectively avoided; the material receiving device adopts a linking mode, is directly transmitted to the material distributing rotating plate after passing through the transmission synchronous belt, is smooth in material receiving, does not need to be transmitted again, and avoids damage to products; the material collecting device adopts the material separating rotating plate to rotate by an angle, the products freely slide down, the qualified products and the unqualified products are separated, the damage of mechanical vibration to the products is avoided, meanwhile, the sorting efficiency is improved, and the time and the labor cost are saved.
Description
Technical Field
The invention relates to the field of defect detection, in particular to a multi-camera transparent object defect detection system, which takes a multi-camera transparent film optical cement defect detection system as an example.
Background
With the increasing demand of the international and domestic transparent film markets for films and the increasingly competitive transparent film industry, more and more production enterprises start to start production lines with higher production speed so as to reduce cost and improve production efficiency. The optical transparent adhesive is widely used in the field of touch screens due to the rapid development of smart phones, tablet computers and vehicle-mounted display screens. The optical transparent adhesive is mainly used for bonding ITO glass or an ITO film and a panel in the touch screen. At present, the number of machine vision brands entering China is over 30, but the number of manufacturers engaged in online detection systems by domestic professionals is small, so that the number of companies really performing machine vision integrated development is less, the whole China machine vision defect detection market is in the rise period, and the China machine vision defect detection system has a wide prospect.
Because the product is easy to generate defects in the production process, taking the transparent film optical cement as an example, the defects such as bubbles, foreign matters, scratches, dirt, indentations and the like are easy to appear on the surface of the transparent film optical cement, so that higher requirements are put forward for defect detection, domestic enterprises still adopt manual defect searching at present, the detection efficiency is low, the method can not meet the defect detection of a large number of products, a single camera is adopted to collect images to detect the optical cement, the defect omission is caused because the shooting defect type is single and the requirement of comprehensively detecting the defect type can not be met, the camera is blocked by a support in the shooting process, for example, the glass supports the camera, the defects of the glass exist, the defects of the collected images are inaccurate, the defect false detection is caused, the product is not smoothly received to cause damage to the product, and the qualified products and the unqualified products cause damage to the product due to mechanical vibration during sorting, therefore, the multi-camera defect detection system becomes an indispensable part for product defect detection.
Disclosure of Invention
Aiming at the defect detection problem in the prior art, the invention aims to provide a multi-camera transparent object defect detection system, taking the multi-camera transparent film optical cement defect detection system as an example, a special linear array camera and an area array camera mechanism are selected, so that the Y-axis and Z-axis directions can be adjusted, the defect types are amplified and detected, a transmission synchronous belt adopts a hollow design, the interference of a support to an intermediate colloid is avoided, a material receiving device adopts a linking mode, the material is directly transmitted to a material distribution rotating plate after passing through the transmission synchronous belt, the material receiving is smooth, the re-transmission is not needed, the damage to the product is avoided, the material receiving device adopts the rotation angle of the material distribution rotating plate, the product freely slides down, the qualified product and the unqualified product are sorted, and the damage to the product caused by mechanical.
The defect detection system provided by the invention comprises a hardware part and a software part; the hardware part comprises a product conveying device, an imaging device, a motion control device and a fixing device; the software part comprises an image processing module and a data storage module.
The product conveying device is used for conveying products on the production line to a plurality of cameras to take pictures and sorting out qualified products and unqualified products.
The imaging device is used for generating an image to be detected.
The image processing module is used for carrying out defect detection according to the image to be detected and generating a defect detection result.
The motion control device is used for controlling the motion states of the product conveying device and the products and displaying the defect detection result.
The data storage module is used for storing the defect detection result.
The fixing device is used for stabilizing the whole detection system.
Preferably, the product conveying device comprises a 1-servo motor + speed reducer, an 11-product feeding device, a 2-transmission synchronous belt, a 7-qualified product receiving box, an 8-unqualified product receiving box, a 6-servo motor and a 17-material distributing rotary plate;
the 2-transmission synchronous belt is driven by the 1-servo motor and the speed reducer and adjusted to a required conveying speed, a product enters the 2-transmission synchronous belt through the 11-product feeding device, the 2-transmission synchronous belt is used for conveying the product, the 2-transmission synchronous belt adopts a hollow design, a light source can be transmitted from the bottom to directly irradiate an optical film part detected in the middle, no interference is caused by other supporting objects, for example, the defects of glass can increase the defects of shot, and therefore the hollow design enables the defects of the shot product to be more accurate; products are conveyed to the 17-material distribution rotating plate through the 2-transmission synchronous belt, a long transmission process is not needed in the middle, damage to the products after detection is avoided, the 6-servo motor drives the 17-material distribution rotating plate to rotate, the qualified products and the unqualified products are controlled to freely slide to the 7-qualified product collecting box and the 8-unqualified product collecting box respectively, and the 7-qualified product collecting box and the 8-unqualified product collecting box are not damaged by mechanical vibration caused by left-right shaking.
Preferably, the imaging device comprises a 3-linear array camera + lens, a 4-area array camera + lens, a 12-backlight linear light source, a 13-backlight surface light source and a 14-sensor;
the 3-linear array camera + lens, the 4-area array camera + lens and the transmission synchronous belt are used for collecting images on the 2-transmission synchronous belt, the 3-linear array camera + lens, the 4-area array camera + lens are adjustable in the directions of the Y axis and the Z axis, the 3-linear array camera + lens can shoot defects such as bubbles, scratches and foreign matters, and the 4-area array camera + lens can shoot indentation defects. 12-the backlight line light source is vertical to the 3-linear array camera and the lens, and a light path is directly projected into the 3-linear array camera and the lens in a transmission mode; and the 13-backlight area light source is arranged on the same axis with the 4-area array camera and the lens, a transmission mode is adopted, and a light path directly enters the 4-area array camera and the lens.
The sensor is used to convert the image signal into an electrical signal 14.
Preferably, the motion control device comprises a 5-display, 10-keyboard mouse, 9-operation control box device
The device comprises a display 5, a keyboard mouse 10, a control box device 9 and a product conveying device, wherein the display is used for displaying a defect detection result, the keyboard mouse is used for controlling an interface to display, and the control box device 9 is used for controlling the product conveying device and the motion state of the product.
Preferably, the image processing module is configured to perform defect detection according to the image to be detected and generate a defect detection result.
Preferably, the database saving module is configured to store the defect detection result.
Preferably, the fixing device comprises a 15-aluminum section frame, a 16-acrylic sealing door;
wherein, the 15-aluminum section frame is used for fixing the whole detection system, and the 16-acrylic sealing door is used for packaging the circuit.
Compared with the prior art, the invention has the following beneficial effects.
1. The system adopts a plurality of cameras and a plurality of light sources, and the cameras and the lenses can be properly adjusted on the Y axis and the Z axis according to the defect types detected by actual needs, so that the detected defect types are more comprehensive
2. The transmission synchronous belt of the system adopts a hollow design, eliminates the interference of supports such as glass and the like to the middle colloid part, effectively avoids the error judgment of other unrelated defects to the defect to be detected, and improves the detection accuracy rate
3. The material receiving position of the system of the invention adopts the butt joint of the material distributing rotating plate and the transmission synchronous belt, the material receiving is smooth without obstruction, and the product is not damaged
4. According to the product receiving system, the material distributing rotating plate is adopted to rotate the angle according to the product detection result, qualified products and unqualified products are automatically classified, the sorting efficiency is improved, the products freely slide into the material receiving box, and damage to the products caused by mechanical vibration is avoided.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is a flow chart of the detection of the present invention
Detailed Description
The present invention will be described in detail with reference to specific embodiments. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention aims to provide a multi-camera defect online detection system to solve the problem that the detection of the defect detection type of a single camera is incomplete at present. The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the multi-camera transparent object defect detecting system provided by the present invention, taking a multi-camera optical adhesive defect detecting system as an example, includes a hardware portion and a software portion; the hardware part comprises a product conveying device, an imaging device, a motion control device and a fixing device; the software part comprises an image processing module and a data storage module.
The conveying device is used for feeding, conveying and receiving products; the imaging device is used for generating an image to be detected; the image processing module is used for carrying out defect detection according to the image to be detected and generating a defect detection result; the motion control device is used for controlling the real-time motion state of the product and displaying the defect detection result; the data storage module is used for storing the defect detection result; the fixing device is used for stabilizing the whole detection system.
The conveying device comprises a servo motor and a speed reducer 1, a product feeding device 11, a conveying synchronous belt 2, a qualified product receiving box 7, an unqualified product receiving box 8, a servo motor 6 and a material distributing rotary plate 17; the 2-transmission synchronous belt is driven by the servo motor and the speed reducer to run at a required speed, a product enters the 2-transmission synchronous belt through the 11-product feeding device, the 2-transmission synchronous belt mechanism is used for conveying material sheets, a hollow design is adopted, and a light source can be transmitted from the bottom; and controlling the qualified products and the unqualified products to fall into a 7-qualified product receiving box and an 8-unqualified product receiving box respectively through the rotation angle of a 6-servo motor driven 17-material distribution rotating plate.
The imaging device comprises a 3-linear array camera + lens, a 4-area array camera + lens, a 12-backlight line light source, a 13-backlight surface light source and a 14-sensor; the 12-backlight line light source and the 13-backlight light source are used for providing illumination, the illumination light path directions of the 12-backlight line light source and the 13-backlight light source are respectively on the same axis with the 3-linear array camera + lens and the 4-area array camera + lens, and the angles of the 3-linear array camera + lens and the 4-area array camera + lens can be adjusted to shoot different types of defects; the 3-linear array camera and the 4-area array camera are used for acquiring images in real time; the 3-linear array camera forms a certain angle with the horizontal direction, a transmission mode is adopted, the light path directly enters the 3-linear array camera, and the 3-linear array camera is used for shooting defects such as bubbles, scratches, foreign matters and the like; the 4-area-array camera is vertical to the horizontal direction, a light path directly penetrates into the 4-area-array camera, and the 4-area-array camera is used for shooting indentation defects; 14-the sensor is used to convert the product image signal into an electrical signal.
The image processing module carries out defect detection and analysis aiming at the acquired images and provides defect detection results of types, sizes, positions, numbers and the like of defects of different products.
The motion control device comprises a display 5, a keyboard and a mouse 10 and an operation control box device 9; 5, the display is used for displaying the defect detection result in real time; 10, the keyboard and the mouse are used for controlling a defect detection result display interface; 9-operating the control box device to adjust the movement speed of the transmission synchronous belt.
The data storage module is used for archiving camera parameters, acquired image parameters, testers, product models, product numbers and defect detection results so as to facilitate subsequent tracking.
The fixing device comprises a 15-aluminum section frame and a 16-acrylic sealing door; 15-the aluminium frame is used to support the whole device; the 16-acrylic sealing door is used for packaging the circuit.
The work flow of the defect detection system provided by the invention comprises the following steps:
step 1: starting up the computer;
step 2: after the equipment stably runs, debugging or checking that the 3-linear array camera + lens and the 4-area array camera + lens work normally;
and step 3: starting the 1-servo motor and the speed reducer, and adjusting the running speed of the 2-transmission synchronous belt mechanism to reach the preset speed to stably run;
and 4, step 4: butting a die-cutting machine, placing a product to a 2-transmission synchronous belt mechanism through an 11-product feeding device, and then conveying the product to a 3-linear array camera + lens and a 4-area array camera + lens image acquisition station;
and 5: detecting whether the product is qualified or not through the image processing module, simultaneously storing the camera parameters and the defect detection result through the data storage module, and if the product is qualified, executing the step 6; if not, executing step 7;
step 6: when the product is transported to the 17-material distribution rotating plate, the angle of the 17-material distribution rotating plate is controlled by the 6-servo motor, and the product directly slides into the 7-qualified product receiving box;
and 7: when the product is transported to the 17-material distribution rotating plate, the angle of the 17-material distribution rotating plate is controlled by the 6-servo motor, and the product directly slides into the 8-unqualified product receiving box;
and 8: the product automation program ends.
The foregoing describes a specific embodiment of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (5)
1. The multi-camera transparent object defect detection system comprises a hardware part and a software part; the hardware part comprises a product conveying device, an imaging device, a motion control device and a fixing device; the software part comprises an image processing module and a data storage module, the product conveying device comprises a 1-servo motor + speed reducer, an 11-product feeding device, a 2-transmission synchronous belt, a 7-qualified product receiving box, an 8-unqualified product receiving box, a 6-servo motor and a 17-material distributing rotary plate, wherein, the 1-servo motor and the speed reducer drive the 2-transmission synchronous belt and adjust to the required transportation speed, the product enters the 2-transmission synchronous belt through the 11-product feeding device, the 2-transmission synchronous belt is used for transporting the product, the product is transported to the 17-material distributing rotary plate through the 2-transmission synchronous belt, the qualified products and the unqualified products are controlled to fall into a 7-qualified product receiving box and an 8-unqualified product receiving box respectively through the rotation angle of a 6-servo motor driven 17-material distribution rotating plate; the imaging device comprises a 3-linear array camera + lens, a 4-area array camera + lens, a 12-backlight line source, a 13-backlight area source and a 14-sensor, wherein the 3-linear array camera + lens, the 4-area array camera + lens acquire images on a 2-transmission synchronous belt, the 12-backlight line source is vertical to the 3-linear array camera + lens and adopts a transmission mode, and a light path directly enters the 3-linear array camera + lens; 13-the backlight area light source and the 4-area array camera and the lens are on the same axis, a transmission mode is adopted, a light path directly enters the 4-area array camera and the lens, and the 14-sensor is used for converting an image signal into an electric signal; the motion control device comprises a 5-display, a 10-keyboard mouse and a 9-operation control box device, wherein the 5-display is used for displaying a defect detection result, the 10-keyboard mouse is used for controlling interface display, and the 9-operation control box device is used for controlling the product conveying device and the motion state of the product; the fixing device comprises a 15-aluminum section frame and a 16-acrylic sealing door, wherein the 15-aluminum section frame is used for fixing the whole detection system, and the 16-acrylic sealing door is used for packaging the circuit; the image processing module is used for carrying out defect detection according to the image to be detected and generating a defect detection result; and the database storage module is used for storing the defect detection result.
2. The multi-camera transparent object defect detecting system of claim 1, wherein the 3-line camera + lens and the 4-area camera + lens are adjustable in the Y-axis and Z-axis directions, different types of defects can be photographed by the rotation angle, the 3-line camera + lens can photograph bubbles, scratches, foreign body defects, and the 4-area camera + lens can photograph indentation defects.
3. The multi-camera transparent object defect detection system of claim 1, further characterized in that the 2-transmission synchronous belt adopts a hollow design, the light source can be transmitted from the bottom to directly irradiate the optical film part detected in the middle, no interference is caused by other supporting objects, for example, defects existing in glass can increase the defects of the shot, and therefore the hollow design enables the defects of the shot product to be more accurate.
4. The multi-camera transparent object defect detection system of claim 1, further characterized in that the products are transported to a 17-distribution rotating plate through a 2-transmission synchronous belt without a lengthy transmission process in the middle, and the connection is smooth, thereby avoiding damage to the products after detection.
5. The multi-camera transparency defect detecting system of claim 1, further characterized in that the 6-servo motor drives the 17-distribution rotating plate to rotate by an angle to control the qualified product and the unqualified product to freely slide down to the 7-qualified product receiving box and the 8-unqualified product receiving box respectively, and the 7-qualified product receiving box and the 8-unqualified product receiving box cause damage to the products due to mechanical vibration without left and right shaking.
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| CN202011256000.XA CN112452808A (en) | 2020-11-11 | 2020-11-11 | Multi-camera transparent object defect detection system |
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| CN112881414A (en) * | 2021-03-29 | 2021-06-01 | 杭州国辰机器人科技有限公司 | Powder impurity particle detector |
| CN113245242A (en) * | 2021-06-17 | 2021-08-13 | 苏州中科行智智能科技有限公司 | Glass slide defect detecting and sorting system |
| CN113514470A (en) * | 2021-06-30 | 2021-10-19 | 上海工程技术大学 | Appearance AOI defect detection device for LED backlight plate |
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