Coil stock detection device
Through the interlaced multi-camera coil detection device, combined with the interlaced light source detection of macro and line scanning cameras, the problems of inefficiency of manual detection and single equipment missing defects are solved in film coil detection, and efficient and accurate detection of multiple defects is achieved.
Patent Information
- Application Number
- CN202422249538.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-13
AI Technical Summary
In the prior art, the quality inspection of long film material coils relies on manual sampling, which has low accuracy, poor real-time performance, low efficiency and high cost, and a single device detection is prone to miss different types of defects.
A coil detection device with multi-camera interlaced layout is adopted, combined with a macro camera and a line scanning camera, and a light and dark field image is generated by interlaced light sources for detection, thereby enhancing defect contrast through image contrast and covering multiple defect types.
It realizes efficient and accurate detection of various defects and defects on the film coil, avoids defect omissions or misjudgment, and improves detection efficiency and accuracy.
Smart Images
Figure CN223217362U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of intelligent equipment, in particular to a coil material detection device. Background Art
[0002] Long strips (strips) of film materials commonly used in 3C industries such as mobile phones and lithium batteries are packaged in rolls. To ensure the effectiveness of use, the rolls need to be quality inspected. Common defects of film rolls include size defects and surface defects. Surface defects include holes, pinholes, black spots, scratches, pollution and other flaws. The traditional inspection method is manual inspection, which is mostly random inspection, with low accuracy, poor real-time performance, low efficiency, high labor intensity, and is greatly affected by manual experience and subjective factors. The inspection method based on machine vision can overcome the above disadvantages to a large extent, but due to the wide variety of defects, a single device can easily miss other types of defects. Therefore, different equipment is used for different defects, making the entire inspection process cumbersome, time-consuming and costly. Utility Model Content
[0003] In view of the above, the present invention provides a roll material detection device that can efficiently and accurately detect various defects on film rolls.
[0004] The present utility model specifically adopts the following technical solutions: a coil material detection device, comprising a frame, a plurality of transmission rollers, and a loading roller and a receiving roller arranged inside the frame, the plurality of transmission rollers are horizontally arranged on the frame to form a detection transmission surface, and a first macro camera, a second macro camera, a first line scan camera and a second line scan camera are sequentially arranged above the detection transmission surface along the transmission direction from the loading end to the unloading end, the first macro camera and the second macro camera are staggered so that the detection field of the first macro camera and the second macro camera covers the width of the material strip, and there is an overlapping area in the middle, the first line scan camera and the second line scan camera are staggered so that the detection field of the first line scan camera and the second line scan camera covers the width of the material strip, and there is an overlapping area in the middle.
[0005] Furthermore, a first macro backlight is arranged directly below the first macro camera, a second macro backlight is arranged directly below the second macro camera, and the first macro backlight and the second macro backlight are both located below the detection and transmission surface; a first line scan backlight is arranged directly below the first line scan camera, a second line scan backlight is arranged directly below the second line scan camera, and the first line scan backlight and the second line scan backlight are both located below the detection and transmission surface.
[0006] Furthermore, a first line scan surface light source is arranged between the first line scan camera and the second line scan camera, and the first line scan surface light source irradiates toward the detection area below the first line scan camera. A second line scan surface light source is arranged on the side of the second line scan camera close to the unloading end, and the second line scan surface light source irradiates toward the detection area below the second line scan camera.
[0007] Furthermore, the first macro camera, the second macro camera, the first macro backlight source, the second macro backlight source, the first line scan backlight source and the second line scan backlight source are each adjustably arranged on two side panels of the frame through a positioning component.
[0008] Furthermore, the positioning assembly includes a limit plate and an adjustment plate, the limit plate is fixed to the inner wall of the side plate of the frame, a first strip hole is opened on the adjustment plate, a bolt passes through the first strip hole and is threadedly connected to the limit plate, and the first macro camera, the second macro camera, the first macro backlight source, the second macro backlight source, the first line scan backlight source and the second line scan backlight source are arranged on the adjustment plate.
[0009] Furthermore, the first line scan camera and the second line scan camera are each mounted on two side plates of the frame through a pair of support columns, the support columns are fixed to the side plates of the frame through clamping seats, and the first line scan camera and the second line scan camera are each mounted on the support columns through crossbeams.
[0010] Furthermore, a second strip-shaped hole is formed on the crossbeam, and the first line scan camera and the second line scan camera are set on their respective corresponding crossbeams by passing bolts through the second strip-shaped hole.
[0011] Furthermore, the first line scan light source and the second line scan light source are each arranged on a side panel of the frame through a rotating adjustment seat, and the angles of the first line scan light source and the second line scan light source can be adjusted through the rotating adjustment seat.
[0012] Furthermore, a plurality of pressure rollers are provided above the detection and conveying surface.
[0013] Furthermore, it also includes a correction control module, which is located in the previous station of the receiving roller.
[0014] This new coil inspection device utilizes multiple cameras to cover a wide range of coil widths and sizes, making it suitable for a wide range of coil sizes. It also features two visual inspection cameras, a macro camera and a line scan camera, enabling comprehensive coverage and detection of multiple defect types. The inspection results from the two cameras can also be compared, making the inspection more accurate and preventing missed or misjudged defects. The line scan camera is equipped with a surface light source and a backlight source, which alternately illuminate in a time-sharing, strobe-like manner. At the same position on the web, the inspection camera generates a brightfield image and a darkfield image. The combined comparison of the two images enhances the contrast of defects, effectively detecting or distinguishing a wider range of defect types compared to product appearance images obtained under a single light source. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the coil material detection device of the present invention.
[0016] Figure 2 This is a plan view showing the positional relationship of various parts of the coil material detection device of the present invention.
[0017] Figure 3 This is a schematic diagram of the connection between the first macro camera (or the second macro camera) and the positioning assembly of the present invention.
[0018] Figure 4 This is a schematic diagram of the connection between the first macro backlight source (or the second macro backlight source) and the positioning component of the present invention.
[0019] Figure 5 This is a schematic diagram of the connection between the first line-scan backlight source (or the second line-scan backlight source) and the positioning component of the present invention.
[0020] Figure 6 This is a schematic diagram of the connection between the first line scan camera (or the second line scan camera) and the support column of the utility model.
[0021] Figure 7 This is a schematic diagram of the connection between the first line-scanning light source (or the second line-scanning light source) and the rotary adjustment base of the utility model. DETAILED DESCRIPTION
[0022] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.
[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "setting", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.
[0024] Reference Figure 1-Figure 2 This embodiment of a coil inspection device includes a frame 100, a plurality of drive rollers 2, and a feed roller 1 and a take-up roller 3 disposed within the frame. The ends of each roller are connected to servo motors, ensuring a uniform speed and constant tension during winding of the web 200. The feed roller 1 and take-up roller 3 are disposed within the frame 100, below the inspection plane, to conserve space. The drive rollers 2 are evenly spaced and arranged horizontally on the frame 100 to form a detection transmission surface. The web 200 extends from the feed roller 1, is stretched and conveyed by the drive rollers 1, and is continuously wound and reeled in by the take-up roller 3. A first macro camera 4, a second macro camera 5, a first line scan camera 6 and a second line scan camera 7 are sequentially arranged above the detection conveying surface along the conveying direction from the loading end to the unloading end. The first macro camera 4 and the second macro camera 5 are arranged alternately so that the combined detection field of view of the first macro camera 4 and the second macro camera 5 covers the width of the material strip 200, and there is an overlapping area between the two. The first line scan camera 6 and the second line scan camera 7 are arranged alternately so that the combined detection field of view of the first line scan camera 6 and the second line scan camera 7 covers the width of the material strip 200, and there is an overlapping area between the two.
[0025] Reference Figure 2 A first macro backlight source 8 is provided directly below the first macro camera 4, and a second macro backlight source 9 is provided directly below the second macro camera 5, and both the first macro backlight source 8 and the second macro backlight source 9 are located below the detection conveying surface. A first line scan backlight source 10 is provided directly below the first line scan camera 6, and a second line scan backlight source 11 is provided directly below the second line scan camera 7, and both the first line scan backlight source 10 and the second line scan backlight source 11 are located below the detection conveying surface. At the same time, a first line scan surface light source 12 is provided between the first line scan camera 6 and the second line scan camera 7. The first line scan surface light source 12 illuminates the detection area below the first line scan camera 6, providing upper surface illumination for the first line scan camera 6. A second line scan surface light source 13 is provided on the side of the second line scan camera 7 near the unloading end, and the second line scan surface light source 13 illuminates the detection area below the second line scan camera 7, providing upper surface illumination for the second line scan camera 7.
[0026] Specific combination Figure 3-Figure 5, the first macro camera 4, the second macro camera 5, the first macro backlight source 8, the second macro backlight source 9, the first line scan backlight source 10 and the second line scan backlight source 11 are each adjustably mounted on the two side panels 101 of the frame 100 through a positioning assembly. The positioning assembly includes a limit plate 14 and an adjustment plate 15. The limit plate 14 is fixed to the inner wall of the side panel 101 of the frame. The adjustment plate 15 is provided with a first strip hole 151. The bolt passes through the first strip hole 151 and is threadedly connected to the limit plate 14. The ends of the first macro camera 4, the second macro camera 5, the first macro backlight source 8, the second macro backlight source 9, the first line scan backlight source 10 and the second line scan backlight source 11 are fixedly arranged on the adjustment plate 15, wherein both ends of the first macro camera 4 and the second macro camera 5 are provided with a positioning assembly, which is mounted above the detection transmission surface through two positioning assemblies. The two positioning The limiting plates 14 of the assembly are respectively fixed to the inner walls of the two side plates 101 of the frame. One end of the first macro camera 4 is directly fixed to the adjustment plate 15 on one side, and the other end is indirectly fixed to the adjustment plate 15 on the other side through a guide rod 16. One end of the second macro camera 5 is directly fixed to the adjustment plate 15 on one side, and the other end is indirectly fixed to the adjustment plate 15 on the other side through a guide rod 16. The ends of the first macro camera 4 and the second macro camera 5 connected to the guide rod 16 are opposite ends. In order to make the first macro camera 4 and the second macro camera 5 staggered, and the detection range of both still covers the width of the entire material strip 200. For the first macro backlight source 8, the second macro backlight source 9, the first line scan backlight source 10 and the second line scan backlight source 11, you can choose to fix one end to the frame 100 through the positioning assembly. By loosening the bolts, the position of the adjustment plate 15 on the limiting plate 14 can be changed, and then the height of the limiting plate 14 can be adjusted, that is, the height of the backlight source or macro camera fixed on the limiting plate 14 is adjusted, and the bolts are tightened to fix the position of the adjustment plate 15.
[0027] Further references Figure 6The first line scan camera 6 and the second line scan camera 7 are each mounted on the two side panels 101 of the frame 100 via a pair of support columns 16. The support columns 16 are fixed to the side panels 101 of the frame via clamping seats 161. The first line scan camera 6 and the second line scan camera 7 are each mounted on the support columns 16 via a crossbeam 17. The crossbeam 17 has a second strip-shaped hole 171 formed therein. Bolts are passed through the second strip-shaped holes to mount the first line scan camera 6 and the second line scan camera 7 on their respective crossbeams 17. Loosening the bolts allows the position of the first line scan camera 6 and the second line scan camera 7 on their respective crossbeams 17 to be changed, thereby adjusting the height of the two line scan cameras. Tightening the bolts secures the position of the first line scan camera 6 and the second line scan camera 7 on their respective crossbeams 17. In this embodiment, the first line scan camera 6 and the second line scan camera 7 are 8k line scan cameras, the horizontal field of view of a single station is 327mm, the dual line scan camera can reach a width of 640mm, 20mm is reserved for each edge, the overlapping area is 54mm, and the maximum detection width is 600mm.
[0028] The first line-scan light source 12 and the second line-scan light source 13 are each mounted on the side panel 101 of the frame 100 via a rotary adjustment seat 18. The angles of the first line-scan light source 12 and the second line-scan light source 13 can be adjusted by rotating the adjustment seat 18. Figure 7 The rotary adjustment seat 18 includes a horizontal adjustment plate 181, a vertical adjustment plate 182 and an angle adjustment plate 183. The first line scan light source 12 and the second line scan light source 13 are respectively fixed on their corresponding angle adjustment plates 183. An arc hole 1831 is provided on the angle adjustment plate 183. The bolt passes through the arc hole 1831 to fix the angle adjustment plate 183 on the vertical adjustment plate 182. Loosening the bolt can change the angle of the angle adjustment plate 183 on the vertical adjustment plate 182, and tightening it is fixed. The vertical adjustment plate 182 has a vertical bar shaped hole 1821, the bolt passes through the vertical strip hole 1821 to fix the vertical adjustment plate 182 to the horizontal adjustment plate 181, and loosening the bolt can change the height of the vertical adjustment plate 182 on the horizontal adjustment plate 181, and tightening it is fixed. The horizontal adjustment plate 181 is provided with a horizontal strip hole 1811 along the same conveying direction, and the bolt passes through the horizontal strip hole 1811 to fix the horizontal adjustment plate 181 to the side plate 101 of the frame 100, and loosening the bolt can change the horizontal position of the horizontal adjustment plate 181 on the side plate 101, and tightening it is fixed.
[0029] During inspection, the backlight sources (first line-scan backlight source 10 and second line-scan backlight source 11) and surface light sources (first line-scan surface light source 12 and second line-scan surface light source 13) of the line-scan cameras (first line-scan camera 6 and second line-scan camera 7) are alternately illuminated in a time-sharing, strobing manner. At the same location on the material strip, the cameras generate a brightfield image and a darkfield image. The combined comparison of these two images enhances the contrast of defects. Compared to product appearance images obtained under a single light source, this method effectively detects or distinguishes a wider range of defect types, avoiding missed defects or misjudgments. The brightfield image, created when the surface light source is illuminated, is particularly effective for detecting defects such as dirt, scratches, spots, streaks, and light spots on the diaphragm. The darkfield image, created when the backlight is illuminated, is particularly effective for detecting defects such as pinholes and holes.
[0030] In addition, a plurality of pressure rollers 19 are provided above the detection conveying surface to press the material belt 200 during the conveying process. The rollers 19 are provided at the rear stations of the first macro camera 4, the second macro camera 5, the first line scan camera 6 and the second line scan camera 7.
[0031] In other embodiments, a deviation correction control module 20 is further provided inside the frame 100 and is located in the previous station of the material receiving roller 3 to ensure that the material strip 200 does not deviate when it is wound.
[0032] During use, the loading roller 1 discharges the material, and the receiving roller 3 is driven by a servo motor to receive the material. The material belt 200 is transmitted by the transmission roller 2 and passes through the first macro camera 4, the second macro camera 5, the first line scan camera and the second line scan camera in sequence for surface defect detection. The photo results of the macro camera and the line scan camera can be compared with each other for verification.
[0033] In addition, the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in this field should understand that technical personnel in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered by the scope of the claims of the present invention.
Claims
1. A coil material detection device, characterized in that: It includes a frame, several transmission rollers, and loading rollers and receiving rollers arranged inside the frame. The several transmission rollers are horizontally arranged on the frame to form a detection transmission surface. Above the detection transmission surface, a first macro camera, a second macro camera, a first line scan camera and a second line scan camera are sequentially arranged along the transmission direction from the loading end to the unloading end. The first macro camera and the second macro camera are arranged in an alternating manner so that the detection fields of the first macro camera and the second macro camera cover the width of the material strip, and there is an overlapping area in the middle. The first line scan camera and the second line scan camera are arranged in an alternating manner so that the detection fields of the first line scan camera and the second line scan camera cover the width of the material strip, and there is an overlapping area in the middle.
2. The coil material detection device according to claim 1, wherein: A first macro backlight is arranged directly below the first macro camera, a second macro backlight is arranged directly below the second macro camera, and the first macro backlight and the second macro backlight are both located below the detection and transmission surface; a first line scan backlight is arranged directly below the first line scan camera, a second line scan backlight is arranged directly below the second line scan camera, and the first line scan backlight and the second line scan backlight are both located below the detection and transmission surface.
3. The coil detection device according to claim 1 or 2, wherein: A first line scan surface light source is arranged between the first line scan camera and the second line scan camera, and the first line scan surface light source irradiates toward the detection area below the first line scan camera. A second line scan surface light source is arranged on the side of the second line scan camera close to the unloading end, and the second line scan surface light source irradiates toward the detection area below the second line scan camera.
4. The coil material detection device according to claim 2, wherein: The first macro camera, the second macro camera, the first macro backlight source, the second macro backlight source, the first line scan backlight source and the second line scan backlight source are each adjustably arranged on two side panels of the frame through a positioning component.
5. The coil material detection device according to claim 4, characterized in that: The positioning assembly includes a limit plate and an adjustment plate, the limit plate is fixed to the inner wall of the side plate of the frame, a first strip hole is provided on the adjustment plate, a bolt passes through the first strip hole and is threadedly connected to the limit plate, the first macro camera, the second macro camera, the first macro backlight source, the second macro backlight source, the first line scan backlight source and the second line scan backlight source are arranged on the adjustment plate.
6. The coil material detection device according to claim 1, wherein: The first line scan camera and the second line scan camera are each mounted on two side plates of the frame through a pair of support columns, and the support columns are fixed to the side plates of the frame through clamping seats. The first line scan camera and the second line scan camera are each mounted on the support columns through a crossbeam.
7. The coil material detection device according to claim 6, wherein: The crossbeam is provided with a second strip-shaped hole, and the first line scan camera and the second line scan camera are set on their respective corresponding crossbeams by passing a bolt through the second strip-shaped hole.
8. The coil material detection device according to claim 3, wherein: The first line scan light source and the second line scan light source are respectively arranged on the side panel of the frame through a rotating adjustment seat, and the angles of the first line scan light source and the second line scan light source can be adjusted through the rotating adjustment seat.
9. The coil material detection device according to claim 1, wherein: A plurality of pressure rollers are also arranged above the detection and conveying surface.
10. The coil material detection device according to claim 1, wherein: It also includes a deviation correction control module, which is located at a station before the receiving roller.