CN111272765A - Product defect detection device based on vision - Google Patents
Product defect detection device based on vision Download PDFInfo
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- CN111272765A CN111272765A CN202010091470.9A CN202010091470A CN111272765A CN 111272765 A CN111272765 A CN 111272765A CN 202010091470 A CN202010091470 A CN 202010091470A CN 111272765 A CN111272765 A CN 111272765A
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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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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a product defect detection device based on vision, which comprises a mounting bracket, wherein a light source, a camera and a controller are mounted on the mounting bracket; the lighting light source can move relative to the mounting bracket to adjust a lighting angle, and the lighting light source can be switched between a direct light source and a diffuse light source; the light source and the camera are connected with the controller. In the product defect detection device based on vision, the form and the position of the light source can be adjusted, so that the light source can be adjusted to be a direct light source form or a diffuse light source form according to requirements during use, the light angle can be adjusted, the defect detection device can adapt to different products to detect pictures with good capturing quality, and the defects that the captured images have light spots and the like and cannot be detected are prevented.
Description
Technical Field
The invention relates to the technical field of machine vision and defect detection, in particular to a product defect detection device based on vision.
Background
In the field of product defect detection, machine vision is often used, images are collected through a camera, and the collected images are identified by using an image identification algorithm so as to detect whether apparent defects exist in products. Current product defect detection device, its light source form and installation are all fixed, and it is relatively poor to the use adaptability of different products, often changes the product that needs to detect after, need choose the light source of different forms for use or adjust the position of light source.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a product defect detection device based on vision, which has better adaptability to different products.
The technical scheme is as follows: in order to achieve the purpose, the product defect detection device based on vision comprises a mounting bracket, wherein a light source, a camera and a controller are mounted on the mounting bracket; the lighting light source can move relative to the mounting bracket to adjust a lighting angle, and the lighting light source can be switched between a direct light source and a diffuse light source; the light source and the camera are connected with the controller.
Further, install light source adjusting device on the installing support, light source adjusting device can drive the light source of polishing is along pitch arc adjustment position.
Further, the light source adjusting device comprises an arc-shaped guide support and a sliding seat, the sliding seat can slide relative to the arc-shaped guide support, and a driving device is arranged between the sliding seat and the arc-shaped guide support.
Further, drive arrangement is including installing arc rack on the arc guide bracket and installing drive gear on the slide, still install on the slide with drive gear drive connection's driving motor.
Further, the light source comprises an outer lampshade, a light emitting unit, a reflecting shade and a sub-surface flexible film;
when the light source is in a direct light source form, only the lower end face of the outer lampshade can have light rays transmitted out, and the light-emitting unit is arranged in the reflecting cover;
when the light source is in a diffuse light source shape, light can penetrate out of the lower end face and the periphery of the side face of the outer lampshade, all the faces capable of penetrating out of the light are wrapped by the sub-face flexible film, and the light emitting unit is arranged outside the reflecting shade.
Has the advantages that: in the product defect detection device based on vision, the form and the position of the light source can be adjusted, so that the light source can be adjusted to be a direct light source form or a diffuse light source form according to requirements during use, the light angle can be adjusted, the defect detection device can adapt to different products to detect pictures with good capturing quality, and the defects that the captured images have light spots and the like and cannot be detected are prevented.
Drawings
FIG. 1 is a block diagram of a vision-based product defect detection apparatus;
FIG. 2 is a schematic diagram of a first state of the light source;
FIG. 3 is a cross-sectional view of a first state of the light source;
FIG. 4 is a second state of the exterior view of the polishing light source;
FIG. 5 is a cross-sectional view of a second state of the light source;
FIG. 6 is a second bottom view of the polishing light source;
FIG. 7 is a flow chart of a vision-based product defect detection method.
In the figure: 1-mounting a bracket; 2-a light source is polished; 21-a transparent outer cover; 21-1-sealing part; 21-2-cylindrical section; 22-an opaque inner cover; 23-a light emitting unit; 24-a reflector; 24-1-a reflective surface; 25-a sub-facial flexible film; 25-1-lateral nesting portion; 25-2-end face shielding part; 25-21-triangular portion; 26-a drive element; 27-a first traction wire; 28-a first reversing wheel; 29-a second reverser wheel; 210-a second traction wire; 211-a third reverser wheel; 212-a transparent hard ring; 213-sealing cover; 214-a rod member; 215-a control unit; 3-a camera; 4-a controller; 5-light source adjusting device; 51-arc guide bracket; 52-a slide; 53-arc rack; 54-a drive gear; 55-driving the motor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The product defect detection device based on vision as shown in the attached figure 1 comprises a mounting bracket 1, wherein a light source 2, a camera 3 and a controller 4 are mounted on the mounting bracket 1; the lighting light source 2 can move relative to the mounting bracket 1 to adjust the lighting angle, and the lighting light source 2 can be switched between a direct light source and a diffuse light source; the lighting light source 2 and the camera 3 are both connected with the controller 4. The controller 4 is provided with image recognition software which can perform image recognition according to the product image captured by the camera 3 to judge whether the surface of the product has defects such as cracks, impurities, bubbles and the like.
Specifically, a light source adjusting device 5 is installed on the mounting bracket 1, and the light source adjusting device 5 can drive the lighting light source 2 to adjust the position along an arc line. Therefore, the light source 2 can be guaranteed to rotate around the product to polish all the time, only the polishing angle of the light source 2 changes, and the polishing target position and the distance between the light source and the product are basically unchanged.
The light source adjusting device 5 includes an arc-shaped guide bracket 51 and a sliding base 52, the sliding base 52 can slide relative to the arc-shaped guide bracket 51, and a driving device is arranged between the sliding base 52 and the arc-shaped guide bracket 51. The driving device comprises an arc-shaped rack 53 arranged on the arc-shaped guide bracket 51 and a driving gear 54 arranged on the sliding seat 52, and the sliding seat 52 is also provided with a driving motor 55 in driving connection with the driving gear 54.
Further, the lighting light source 2 comprises an outer lampshade 21, a light emitting unit 23, a reflecting shade 24 and a sub-surface flexible film 25; when the lighting light source 2 is in a direct light source form, only the lower end face of the outer lampshade 21 can have light rays transmitted out, and the light emitting unit 23 is arranged in the reflecting shade 24; when the light source 2 is in a diffuse light source shape, light can be transmitted from the lower end surface and the periphery of the side surface of the outer lampshade 21, all the surfaces capable of transmitting light are wrapped by the sub-surface flexible film 25, and the light emitting unit 23 is arranged outside the reflecting shade 24. Therefore, when the detected product is a bright surface, the light source 2 can be switched to a diffuse light source form and obliquely irradiated, so that the condition that light spots do not exist on the surface of the product in the image acquired by the camera 2 to influence identification is ensured; when the detected product is a matt surface, the lighting light source 2 can be switched to a direct light source form to ensure the lighting brightness.
Specifically, as shown in fig. 2 to 5, the light source 2 includes an outer lamp housing 21, an inner lamp housing 22, a light emitting unit 23, a reflector 24, a sub-surface flexible film 25, and a driving element 26; the outer lampshade 21 is made of a smooth transparent material and comprises a cylindrical part 21-2, and the lower end of the cylindrical part 21-2 is provided with a sealing part 21-1; the inner lampshade 22 is made of opaque material, is of a hollow columnar structure, has an open lower end, is arranged on the inner side of the outer lampshade 21 and can slide relative to the outer lampshade; the reflector 24 is provided with a concave reflecting surface 24-1 and is fixed relative to the inner lampshade 22; the sub-surface flexible film 25 is made of a sub-surface light-transmitting material and is provided with a side edge sleeving part 25-1 and an end surface shielding part 25-2, the side edge sleeving part 25-1 is sleeved on the periphery of the cylindrical part 21-2, and the end surface shielding part 25-2 is used for shielding the sealing part 21-1; the light emitting unit 23 is fixed with respect to the outer lamp housing 21; the driving element 26 can drive the inner lampshade 22 to move between a first position and a second position relative to the outer lampshade 21, and the relative movement of the inner lampshade 22 and the outer lampshade 21 can drive the relative movement of the sub-surface flexible film 25 relative to the outer lampshade 21; in this way, the driving element 26 can directly drive the inner lampshade 22 to move, and can indirectly drive the sub-surface flexible film 25 to move through the inner lampshade 22, and the whole lighting light source 2 only needs one power source 2: the driving element 26 can realize the conversion of the illumination form of the illumination light source 2.
As shown in fig. 2-3, when the inner housing 22 is located at the first position relative to the outer housing 21, the light emitting unit 23 is disposed in the reflector 24, and the sealing portion 21-1 is not covered by the end-face shielding portion 25-2; at this time, the inner lamp shade 22 is located at the lower end position in the outer lamp shade 21, the inner lamp shade 22 covers the lower side of the cylindrical portion 21-2, so that the light emitted by the light emitting unit 23 cannot shine out of the cylindrical portion 21-2, and meanwhile, because the light emitting unit 23 is arranged in the reflecting shade 24, the concave reflecting surface 24-1 of the reflecting shade 24 can reflect the light emitted by the light emitting unit 23 into parallel light to be emitted, so that the lighting light source 2 is used as a direct light emitting unit at this time.
As shown in fig. 4-5, when the inner housing 22 is located at the second position relative to the outer housing 21, the light emitting unit 23 is disposed outside the reflector 24, and the sealing portion 21-1 is shielded by the end shielding portion 25-2. At this time, since the inner lamp housing 22 moves upward relative to the first position, on one hand, the lamp housing 22 does not shield the lower side of the cylindrical portion 21-2, so that the light emitted from the light emitting unit 23 can be transmitted from the lower side of the cylindrical portion 21-2, on the other hand, the lamp housing 22 moves upward, so that the light emitting unit 23 moves out of the reflector 24, the reflector 24 no longer functions to convert the light into parallel light, and the light emitted from the light emitting unit 23 has a larger irradiation range, on the third hand, due to the upward movement of the inner lamp housing 22, the movement of the sub-surface flexible film 25 is driven, so that the end surface shielding portion 25-2 on the sub-surface flexible film 25 partially moves to the position of the sealing portion 21-1 to shield the sealing portion 21-1, so that all the light-transmitting surfaces of the illumination light source 2 are covered by the sub-optical material, and the light emitted from the light emitting unit 23 is converted into, the illumination light source 2 is a diffused light emitting unit at this time.
Specifically, the end face shielding portion 25-2 is composed of a plurality of triangular portions 25-21, and when the inner globe 22 is at a first position relative to the outer globe 21, the triangular portions 25-21 are disposed at the periphery of the cylindrical portion 21-2; when the inner lamp housing 22 is in the second position relative to the outer lamp housing 21, all the triangular portions 25-21 are combined to form a shielding plate 2 (as shown in fig. 6) capable of shielding the sealing portion 21-1. Thus, the sealing portion 21-1 can be shielded and the sealing portion 21-1 can be shielded.
Specifically, the triangular part 25-21 is connected with a first traction wire 27, the first traction wire 27 bypasses a first reversing wheel 28 and a second reversing wheel 29 which are installed on the outer lampshade 21 and is connected with the inner lampshade 22, a penetrating hole is formed in the middle of the sealing part 21-1, the first reversing wheel 28 is arranged at the penetrating hole, the second reversing wheel 29 is installed at the junction position of the sealing part 21-1 and the cylindrical part 21-2 in the outer lampshade 21, and the first traction wire 27 bypasses the first reversing wheel 28 to be rotated to the inner side of the outer lampshade 21 and then bypasses the second reversing wheel 29 to be connected with the inner lampshade 22; the side edge sheathing part 25-1 is connected with a second traction wire 210, the second traction wire 210 bypasses a third reversing wheel 211 arranged on the outer lampshade 21 and is connected with the inner lampshade 22, the third reversing wheel 211 is arranged on the upper side of the cylindrical part 21-2, and the second traction wire 210 bypasses the third reversing wheel 211 and is led to the inner side of the outer lampshade 21 and is connected with the inner lampshade 22. Therefore, the flexible sub-surface film 25 can be driven bidirectionally when the inner lampshade 22 moves bidirectionally. The reversing wheels and the traction wire are made of transparent materials to prevent light from being shielded.
Preferably, transparent hard rings 212 are respectively arranged on two sides of the side edge nesting portion 25-1, and the transparent hard rings 212 are arranged to prevent the side edge nesting portion 25-1 from deforming.
A cover 213 is fixed on the back side of the outer lamp housing 21, a rod 214 passing through the center of the reflector 24 is fixed on the cover 213, and the light emitting unit 23 is mounted on one end of the rod 214 far away from the cover 213, so that the reflector 24 can move relative to the light emitting unit 23.
The driving element 26 is an electric push rod, which is installed inside the outer lamp housing 21, and both ends of the electric push rod are respectively connected to the outer lamp housing 212 (connected to the outer lamp housing 21 through the cover 213) and the inner lamp housing 22. A control unit 215 is also installed in the outer lamp housing 21. All components are installed in the outer lampshade 21, the assembly of the lighting light source 2 is complete, no external accessories are needed, the control unit 215 only needs to be connected with a power supply and receives external control signals to control the lighting unit 23 to be turned on or off, and the lighting light source 2 is controlled to be changed between the irradiation lighting unit form and the diffusion lighting unit form.
The invention also provides a vision-based product defect detection method based on the above vision-based product defect detection device, which is applied to the controller 4, as shown in fig. 7, and comprises the following steps a1-a 6:
a1, acquiring product type information;
step A2, adjusting the form and position of the lighting source 2 as the target form and target position according to the type information;
in this step, the shape and position of the light source 2 corresponding to the product of each item of information are prestored in the controller 4 in the form of a mapping table; after the controller 4 acquires the product type information, the corresponding form and position of the light source 2 are obtained by inquiring the mapping relation table;
a step a3 of controlling the driving element 26 to operate, so that the lighting source 2 is switched to the target configuration;
step a4, controlling the light source adjusting device 5 to operate so that the lighting source 2 moves to a position corresponding to the target position;
step a5, controlling the light emitting unit 23 of the lighting source 2 to be turned on;
step A6, acquiring the image of the product through the camera 3, recognizing the image by using image recognition software, judging whether the product has defects, and outputting corresponding information according to the judgment result.
In this step, the method for identifying defects by using the image identification software adopts the prior art, and the information output by the controller 4 is as follows: and when the product has defects, the NG is displayed through a preset display screen, and when the product has no defects, the OK is displayed through the preset display screen.
The detection method can realize automatic adjustment of the light source shape and the polishing direction corresponding to different products, and can detect defects, is simple and convenient, and does not need manual replacement of the light source and adjustment of the polishing direction after the products are replaced.
In the product defect detection device based on vision, the form and the position of the light source can be adjusted, so that the light source can be adjusted to be a direct light source form or a diffuse light source form according to requirements during use, the light angle can be adjusted, the defect detection device can adapt to different products to detect pictures with good capturing quality, and the defects that the captured images have light spots and the like and cannot be detected are prevented.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (5)
1. A product defect detection device based on vision is characterized by comprising a mounting bracket, wherein a light source, a camera and a controller are mounted on the mounting bracket; the lighting light source can move relative to the mounting bracket to adjust a lighting angle, and the lighting light source can be switched between a direct light source and a diffuse light source; the light source and the camera are connected with the controller.
2. The vision-based product defect inspection device of claim 1, wherein a light source adjustment device is mounted on the mounting bracket, the light source adjustment device being configured to drive the position of the light source along an arc.
3. The vision-based product defect detecting device of claim 2, wherein the light source adjusting device comprises an arc-shaped guide bracket and a slide base, the slide base can slide relative to the arc-shaped guide bracket, and a driving device is arranged between the slide base and the arc-shaped guide bracket.
4. The vision-based product defect detecting device of claim 3, wherein the driving device comprises an arc-shaped rack mounted on the arc-shaped guide bracket and a driving gear mounted on the sliding seat, and a driving motor in driving connection with the driving gear is further mounted on the sliding seat.
5. The vision-based product defect detection apparatus of claim 1, wherein the light source comprises an outer light cover, a light emitting unit, a reflector, and a sub-surface flexible film;
when the light source is in a direct light source form, only the lower end face of the outer lampshade can have light rays transmitted out, and the light-emitting unit is arranged in the reflecting cover;
when the light source is in a diffuse light source shape, light can penetrate out of the lower end face and the periphery of the side face of the outer lampshade, all the faces capable of penetrating out of the light are wrapped by the sub-face flexible film, and the light emitting unit is arranged outside the reflecting shade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091470.9A CN111272765A (en) | 2020-02-13 | 2020-02-13 | Product defect detection device based on vision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091470.9A CN111272765A (en) | 2020-02-13 | 2020-02-13 | Product defect detection device based on vision |
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| Publication Number | Publication Date |
|---|---|
| CN111272765A true CN111272765A (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010091470.9A Withdrawn CN111272765A (en) | 2020-02-13 | 2020-02-13 | Product defect detection device based on vision |
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| CN (1) | CN111272765A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189113A (en) * | 2021-04-30 | 2021-07-30 | 聚时科技(上海)有限公司 | Intelligent digital light source and method based on visual detection |
| CN116519705A (en) * | 2023-06-26 | 2023-08-01 | 中数智科(杭州)科技有限公司 | 360 inspection systems in train carriage |
-
2020
- 2020-02-13 CN CN202010091470.9A patent/CN111272765A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189113A (en) * | 2021-04-30 | 2021-07-30 | 聚时科技(上海)有限公司 | Intelligent digital light source and method based on visual detection |
| CN116519705A (en) * | 2023-06-26 | 2023-08-01 | 中数智科(杭州)科技有限公司 | 360 inspection systems in train carriage |
| CN116519705B (en) * | 2023-06-26 | 2023-10-13 | 中数智科(杭州)科技有限公司 | 360 inspection systems in train carriage |
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Application publication date: 20200612 |