CN216747463U - On-line object surface defect detection device - Google Patents
On-line object surface defect detection device Download PDFInfo
- Publication number
- CN216747463U CN216747463U CN202220052238.9U CN202220052238U CN216747463U CN 216747463 U CN216747463 U CN 216747463U CN 202220052238 U CN202220052238 U CN 202220052238U CN 216747463 U CN216747463 U CN 216747463U
- Authority
- CN
- China
- Prior art keywords
- target object
- cameras
- shooting
- light source
- control module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007547 defect Effects 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 title description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 25
- 230000001678 irradiating effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Images
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The utility model relates to a device for detecting surface defects of an online object, which comprises: the support comprises a first cross beam arranged above the production line; the cameras are arranged on the first cross beam in an array manner, form a shooting area and are used for shooting the detected surface of the target object on the production line; the reflection light source is arranged on the first cross beam and used for irradiating a shooting area, and a certain angle is formed between light rays generated by the reflection light source and the measured surface of the target object; and the control module is electrically connected with the plurality of cameras and the reflection light source, and when the target object is conveyed into the shooting area, the control module controls the plurality of cameras to shoot the detected surface of the target object once or for multiple times at the same time and transmits the shooting data to the outside. The utility model uses a plurality of cameras of the array to enlarge the shooting area so as to ensure that the target object with a large detected surface is shot with high precision and is used for detecting the detected surface of the target object.
Description
Technical Field
The utility model belongs to the technical field of visual detection, and particularly relates to a detection device capable of detecting surface defects of a large article with high precision.
Background
The visual inspection technology is to use a machine instead of a human being for inspection, that is, an image pickup device converts an object to be inspected into an image signal, and then the image signal is transmitted to an image processing system for identification features and/or operation, etc. to further distinguish. In an automated production line, defect detection is required on the surface of the produced product to ensure product quality and process consistency. The existing detection of the surface of a product mainly aims at medium and small products, an image shooting device is used for shooting the whole detected surface of the medium and small products integrally, when the detected surface of the product is large, the pixel resolution of the shot image is in inverse relation with the area of the detected surface of the product, so that the pixel resolution of the shot image does not reach the standard, and the detection requirement of the surface defect cannot be met.
SUMMERY OF THE UTILITY MODEL
In order to solve all or part of the above problems, the present invention is directed to provide an apparatus for detecting defects on the surface of an online object, which uses a plurality of cameras in an array to increase the image capture area, thereby improving the pixel resolution of the captured image, and can capture a target object having a large surface area with high accuracy, and is used to detect whether the surface of the target object has defects such as shape, protrusion, foreign matter, deformation, scratch, color difference, holes, cracks, and the like, so as to meet the detection requirement of product quality.
The utility model provides a device for detecting surface defects of an online object, which comprises: the support comprises a first cross beam arranged above the production line; the cameras in the array form a shooting area for shooting the detected surface of the target object on the production line; the reflection light source is arranged on the first beam and used for irradiating a shooting area, and a certain angle is formed between light rays generated by the reflection light source and the measured surface of the target object; and the control module is electrically connected with the plurality of cameras and the reflection light source, and when the target object is conveyed into the shooting area, the control module controls the plurality of cameras to shoot the detected surface of the target object one or more times at the same time and transmits the shooting data to the outside.
Further, the array pitch of the plurality of cameras is adjusted according to the pixel resolution of the shot image, and the shooting area is adjusted according to the area of the measured surface of the target object.
Further, any point on the target object can be photographed by three or more cameras.
Furthermore, the control module comprises a plurality of controllers, each controller is electrically connected with less than or equal to ten cameras, and is used for controlling the cameras to shoot the target object and transmitting shot data to the outside.
The camera further comprises a speed sensor, the speed sensor detects the moving speed of the target object and is electrically connected with the control module, and the control module adjusts the shooting frequency of the camera according to the moving speed of the target object.
Further, the system also comprises a space calibration ruler used for calibrating the pixel resolution of the plurality of cameras.
Further, the reflection light source comprises a plurality of sub light sources, and the number of the sub light sources is adjusted according to the areas of the shooting area and the measured surface of the target object.
Further, the sub-light source is a near-infrared monochromatic parallel light source.
Further, the linear array or rectangular array of multiple cameras is on the first beam.
According to the technical scheme, the device for detecting the surface defects of the online object increases the shooting area through the plurality of cameras arranged above the production line in an array mode, the reflection light source is arranged above the production line, the detected surface of the target object on the production line is illuminated, the detected surface is shot in the plurality of cameras clearly, the pixel resolution of the image shot by the cameras is improved, and whether the detected surface has the defects of shape, position, protrusion, foreign matter, deformation, scratch, color difference, holes, cracks and the like is judged easily. When the length or the width of the measured surface of the target object is larger than the length or the width of the shooting area, the control module can control the multiple cameras to shoot the measured surface of the target object in a segmented mode for multiple times so as to improve the pixel resolution of the shot image. The device for detecting the surface defects of the online objects does not need any moving component, reduces errors in the moving process, can improve the pixel resolution of a shot image, can shoot target objects with large-area surfaces at high precision, transmits shot data to the outside through the control module, is used for detecting the detected surfaces of the target objects, is easy to judge whether the detected surfaces have defects such as shapes, positions, bulges, foreign bodies, deformation, scratches, chromatic aberration, holes, cracks and the like, and meets the detection requirements of the surface defects.
In addition, the online object surface defect detection device has the advantages of simple structure, easiness in manufacturing, safety and stability in use, wide market prospect and high application and popularization values.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for detecting surface defects of an on-line object according to an embodiment of the present invention;
FIG. 2 is a schematic view of light rays in an apparatus for detecting surface defects of an on-line object according to an embodiment of the present invention;
FIG. 3 is a side view of an apparatus for detecting surface defects of an online object according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view of an apparatus for detecting surface defects of an on-line object according to an embodiment of the present invention;
FIG. 5 is a schematic view of a pitch calibration ruler in accordance with an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a splicing calibration ruler according to an embodiment of the present invention;
fig. 7 is an enlarged schematic view of the splice scale of fig. 6 according to the embodiment of the present invention.
Detailed Description
For better understanding of the objects, structure and functions of the present invention, an apparatus for detecting surface defects of an on-line object according to the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 to 3 show an apparatus for detecting surface defects of an online object according to an embodiment of the present invention. The online object surface defect detection device 100 comprises a support 1, a plurality of cameras 2, a reflection light source 11 and a control module. The support 1 comprises a first beam 4 arranged above the production line 10, the length of the first beam 4 being greater than the width of the production line 10. The plurality of cameras 2 are arranged on the first beam 4 in an array, and the plurality of cameras 2 in the array form a shooting area for shooting the detected surface of the target object 9 on the production line 10. The reflection light source 11 is arranged on the first beam 4 and used for irradiating a shooting area, and light rays generated by the reflection light source 11 form a certain angle with the measured surface of the target object 9, so that reflected light reflected by the measured surface of the target object 9 is prevented from directly entering the lenses of the plurality of cameras 2, and the problem that the quality of shot images is affected by underexposure and the like in shooting is solved. The control module is electrically connected with the multiple cameras 2 and the reflection light source 11, when the target object 9 is conveyed to the shooting area, the control module controls the multiple cameras 2 to shoot the target object 9 at the same time, when the length of the detected surface of the target object 9 is smaller than that of the shooting area, the multiple cameras 2 only shoot once to improve the shooting efficiency, and when the length of the detected surface of the target object 9 is larger than or equal to that of the shooting area, the multiple cameras 2 shoot for multiple times to meet the detection requirement of the surface defects. After shooting, the control module transmits the shooting data to the outside for the detected surface detection of the target object 9. The PC can be used for receiving shooting data from the outside, special detection software is operated on the PC, the shooting data of the plurality of cameras 2 can be subjected to defect grabbing, abnormal points are formed, level distinguishing is carried out according to the abnormal points, or the positions of the abnormal points on the detected surface are displayed in the display device, so that the further work of workers is facilitated.
The online object surface defect detection device 100 of the embodiment of the utility model enlarges the shooting area by arranging the plurality of cameras 2 arrayed above the production line 10 through the bracket 1, and then arranges the reflection light source 11 above the production line 10 to illuminate the detected surface of the target object 8 on the production line 10, so that the detected surface is clearly shot in the plurality of cameras 2, the pixel resolution of the image shot by the cameras 2 is improved, and whether the detected surface has defects such as shape, position, bulge, foreign matter, deformation, scratch, color difference, hole, crack and the like is easily judged. When the length or the width of the measured surface of the target object 9 is greater than the length or the width of the shooting area, the control module may control the multiple cameras to shoot the measured surface of the target object 9 in segments for multiple times, so as to improve the pixel resolution of the shot image. The device 100 for detecting the surface defects of the online object does not need any moving component, reduces errors in the moving process, can improve the pixel resolution of a shot image, can shoot a target object 9 with a large surface area at high precision, transmits shot data to the outside through the control module, is used for detecting the detected surface of the target object 9, is easy to judge whether the detected surface has defects such as shape, shape and position, protrusion, foreign matter, deformation, scratch, chromatic aberration, holes, cracks and the like, and meets the detection requirement of the surface defects.
In the present embodiment, the array pitch of the plurality of cameras 2 is adjusted according to the pixel resolution of the captured image, and the capture area is adjusted according to the size of the measured surface of the target object 9. In the production line 10, the pixel resolution of the images to be captured for the detection of surface defects differs for different target objects 9, in particular for different heights of the measured surface of the target object 9. The array of multiple cameras 2 is arranged on the first beam 4, the vertical distance between the first beam 4 and the production line 10 is not changed, so the vertical distance between the multiple cameras 2 and the production line 10 is also not changed, the height of the measured surface of the target object 9 is different, and the distance between the measured surface of the target object 9 and the multiple cameras 2 is different, so the array distance of the multiple cameras 2 needs to be adjusted to keep the pixel resolution of the shot image to meet the requirement of detection of surface defects, and the accuracy of the detection of the measured surface of the target object 9 is improved. Also, in the production line 10, the width of the measured surface of the target object 9 needs to be smaller than the width of the photographing region, and particularly, the width and the height of the target object 9 are different, affecting whether the target object 9 is within the photographing region. The shooting area is formed by the plurality of cameras 2, and the plurality of cameras 2 are arranged on the first beam 4 in an array manner, so that the shooting area is gradually increased from top to bottom, and the measured surface of the target object 9 can be shot in the shooting area, and therefore, the size of the shooting area needs to be adjusted by adjusting the number of the plurality of cameras 2 in the array manner, so as to ensure that the measured surface of the target object 9 is in the shooting area, that is, the measured surface of the target object 9 is clearly shot, so that the requirement for detecting surface defects can be met, and the precision for detecting the measured surface of the target object 9 is improved. In order to further improve the shooting effect, the device 100 for detecting the surface defect of the online object of the present invention can enable any point on the target object 9 to be shot by three or more cameras, so as to meet the requirement of detecting the surface defect, and further improve the precision of the detected surface detection of the target object 9.
As shown in fig. 4 to fig. 7, the apparatus 100 for detecting surface defects of an online object of the present embodiment further includes a pitch calibration scale 5, and the pitch calibration scale 5 is used for calibrating the pixel resolution of the camera. The array pitch of the plurality of cameras 2 is adjusted according to the pixel resolution of the captured image, that is, the pixel resolution of the captured image affects the array pitch of the plurality of cameras 2, so the apparatus 100 for detecting the surface defect of the on-line object is provided with the pitch scaling rule 5, which not only facilitates the adjustment of the array pitch of the plurality of cameras 2, but also reduces the adjustment error. In another embodiment, the apparatus 100 for detecting surface defects of an online object further includes a stitching calibration ruler 6, the stitching calibration ruler 6 is used to calibrate stitching positions between the camera blocks of multiple cameras, the apparatus 100 for detecting surface defects of an online object forms a shooting area through multiple cameras 2, when the detected surface of the target object 9 needs to be displayed on the display device, images shot by each camera 2 need to be stitched into a complete image, which can be completely displayed, and the defects are marked, so that the calibration plate 6 needs to be stitched to determine the relative position (array pitch) and the view field position (lens direction) of each camera 2. As shown in fig. 6, the splicing calibration plate 6 has a groove arrangement with a length gradually increasing and/or decreasing, the splicing calibration plate 6 is disposed on the production line 10, a plurality of cameras 2 shoot images, image splicing is performed according to the groove arrangement relationship on the shot images, and then the relative position (array pitch) and the view field position (lens direction) of each camera 2 are adjusted according to the image splicing result. The device 100 for detecting surface defects of an online object is generally calibrated by using a splicing calibration plate 6 and then calibrated by using a spacing calibration plate 7.
As shown in fig. 3, the control module of the apparatus 100 for detecting surface defects of an on-line object includes a plurality of controllers 8, each controller 8 is electrically connected to ten or less cameras 2, and controls the cameras 2 to photograph the surface to be detected of the target object 9, and then pre-process, for example, compress, the photographed image, and transmit the photographed data to the outside. The apparatus 100 for detecting surface defects of an on-line object further comprises a speed sensor, wherein the speed sensor detects the moving speed of the target object 9 and is electrically connected with the control module, and the control module adjusts the shooting frequency of the camera according to the moving speed of the target object 9. When the length of the measured surface of the target object 9 is smaller than the length of the shooting area, that is, the measured surface of the target object 9 can be completely located in the shooting area, the multiple cameras 2 can only shoot the measured surface of the target object 9 once, the target object 9 moves in the production line 10, the moving speed of the target object 9 is detected by the speed sensor, and the control module adjusts the shooting frequency of the cameras according to the moving speed of the target object 9, so that the multiple cameras 2 only shoot the target object 9 once, thereby improving the shooting efficiency and reducing the shooting error. When the length of the detected surface of the target object 9 is greater than the length of the shooting area, that is, the detected surface of the target object 9 needs to be shot in a segmented manner, how to reduce the segmentation and the position of the segmentation is reduced, the moving speed of the target object 9 is detected by the speed sensor, and the control module adjusts the shooting frequency of the camera according to the moving speed of the target object 9, so that the multiple cameras 2 can shoot the detected surface of the target object 9 with the least number of times, thereby improving the shooting efficiency and reducing the shooting error.
In this embodiment, the projection light source 3 includes a plurality of sub light sources, and the number of the sub light sources is adjusted according to the shooting area and the measured surface of the target object 9, so as to improve the light of the shooting environment and the shooting effect, and meet the requirement of detecting the surface defect. In this embodiment, the preferred sub-light source has a power greater than that of the light sourceIs equal to 250W/m2The near infrared monochromatic parallel light source is used for improving the definition of the shot picture.
In the embodiment, the plurality of cameras 2 are linearly arrayed on the first beam 4, that is, only one row of cameras 2 is arranged on the first beam 4, only the width of the shooting area is increased, so that the width of the shooting area is greater than or equal to the width of the measured surface of the target object 9, the measured surface of the target object 9 on the production line 10 can be shot, the pixel resolution of the shot image is improved, and the cost for purchasing the plurality of cameras 2 can be saved. In another embodiment, the cameras 2 are arranged in a rectangular array on the first beam 4, that is, the cameras 2 are arranged in multiple rows on the first beam 4, so that the width and length of the shooting area are increased, the measured surface of the target object 9 on the production line 10 can be quickly shot, the pixel resolution of the shot image is improved, and the shooting efficiency is improved.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.
In the description of the present application, it is to be understood that the terms "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. An apparatus for detecting surface defects of an on-line object, comprising:
the support comprises a first cross beam arranged above the production line;
the cameras in the array form a shooting area for shooting the detected surface of the target object on the production line;
the reflecting light source is arranged on the first cross beam and used for irradiating a shooting area, and a certain angle is formed between light rays generated by the reflecting light source and the measured surface of the target object;
and the control module is electrically connected with the plurality of cameras and the reflection light source, and when the target object is conveyed into the shooting area, the control module controls the plurality of cameras to shoot the detected surface of the target object one or more times at the same time and transmits the shooting data to the outside.
2. The apparatus of claim 1, wherein the array pitch of the plurality of cameras is adjusted according to the pixel resolution of the captured image, and the capture area is adjusted according to the area of the surface of the target object.
3. The apparatus of claim 2, wherein any point on the target object can be captured by three or more cameras.
4. The apparatus for detecting surface defects of on-line objects according to claim 1, wherein the control module comprises a plurality of controllers, each controller is electrically connected to at most ten of the cameras, controls the cameras to photograph the target object and transmits the photographed data to the outside.
5. The apparatus of claim 1, further comprising a speed sensor for detecting the moving speed of the target object, wherein the speed sensor is electrically connected to the control module, and the control module adjusts the shooting frequency of the camera according to the moving speed of the target object.
6. The apparatus of claim 2, further comprising a pitch scaling ruler for scaling the pixel resolution of the plurality of cameras.
7. The apparatus for detecting surface defects of an on-line object according to any one of claims 1 to 6, wherein the reflection light source comprises a plurality of sub light sources, and the number of the sub light sources is adjusted according to the areas of the shooting area and the measured surface of the target object.
8. The apparatus of claim 7, wherein the sub-light source is a near-infrared monochromatic parallel light source.
9. The apparatus for detecting surface defects of on-line objects according to any one of claims 1 to 6, wherein the linear array or rectangular array of multiple cameras is on the first beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220052238.9U CN216747463U (en) | 2022-01-10 | 2022-01-10 | On-line object surface defect detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220052238.9U CN216747463U (en) | 2022-01-10 | 2022-01-10 | On-line object surface defect detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216747463U true CN216747463U (en) | 2022-06-14 |
Family
ID=81912162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220052238.9U Active CN216747463U (en) | 2022-01-10 | 2022-01-10 | On-line object surface defect detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216747463U (en) |
-
2022
- 2022-01-10 CN CN202220052238.9U patent/CN216747463U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102023164B (en) | For detecting the apparatus and method of the local defect of transparent plate | |
| CN110530869B (en) | Detection system based on position information and image information | |
| CN108760765B (en) | Side-view camera shooting-based surface damage defect detection device and method | |
| CN108765416B (en) | PCB surface defect detection method and device based on rapid geometric alignment | |
| CN216898747U (en) | On-line object size measuring device | |
| US8055058B2 (en) | Apparatus and method for detecting defects in wafer using line sensor camera | |
| KR20170107952A (en) | Optical appearance inspection device and optical appearance inspection system using same | |
| CN108332708A (en) | Laser leveler automatic checkout system and detection method | |
| CN214747771U (en) | Automatic detection equipment for parts | |
| CN107764841B (en) | Device and method for detecting and distinguishing defects of upper surface and lower surface of transparent glass cover plate | |
| CN101673043B (en) | Wide-angle distortion testing system and method | |
| CN102353518A (en) | Device and method for detecting quality of lattice point of printed light guide plate | |
| CN113566733A (en) | Line laser vision three-dimensional scanning device and method | |
| CN116256366A (en) | Chip defect detection method, detection system and storage medium | |
| CN216747463U (en) | On-line object surface defect detection device | |
| CN218788002U (en) | Surface defect detection system and surface detection production line | |
| US20130162816A1 (en) | Device for measuring the shape of a mirror or of a specular surface | |
| CN217237786U (en) | 2D and 3D fused 6S detection and measurement optical device | |
| CN115420750A (en) | Surface defect detection system, surface defect detection method and surface detection production line | |
| CN116309864A (en) | Short wave infrared dual-camera calibration device and calibration method | |
| CN106768891B (en) | Special equipment for detecting object surface normal error based on reflection image method | |
| CN213209949U (en) | Display panel defect detection device | |
| KR101198406B1 (en) | Pattern inspection device | |
| US20090190824A1 (en) | Inspection apparatus and inspection method | |
| CN100529744C (en) | Optical detection device and detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |