Nonferrous metal strip detection equipment

Abstract

The utility model discloses non-ferrous metal strip detection equipment which comprises a guide roller and a strip driven by an external winding drum to move on the guide roller, the upper side and the lower side of the strip are respectively provided with a group of mounting plates and a fixed frame, the mounting plates are provided with at least two groups of fixed cameras, the two groups of fixed cameras are arranged in a staggered manner, and the fixed cameras are arranged on the guide roller. An illuminating lamp is mounted on the fixed camera; a plurality of sliding grooves are evenly formed in the fixing frame, sliding seats are arranged in the sliding grooves in a sliding mode, and tracking cameras are arranged on the sliding seats. According to the utility model, the industrial camera is adopted for visual inspection, so that the machine row speed during belt material transportation can be improved, the working efficiency is further improved, the defect detection rate and the detection result accuracy are also improved through multiple times of detection confirmation, the difference degree between the detection result and the defect actually existing on the surface of the whole roll of belt material is greatly reduced, and the product quality is improved. And the overall quality of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of non-ferrous metal production, in particular to a non-ferrous metal strip detection device. Background Technique

[0002] Non-ferrous metal strips generally refer to flat-rolled non-ferrous metal products with a rectangular cross-section, uniform thickness (the thickness of aluminum plates is greater than 0.20 mm, and the thickness of copper plates is greater than 0.15 mm), and in a strip shape. During the production process of the products, various defects will occur due to various factors, such as scratches, indentations, pitting, or oxidation discoloration, etc. Before the strips leave the factory, it is necessary to detect the defect characteristics and sizes on the upper and lower surfaces of the strips, and determine whether they meet the finished product requirements according to the detection results. The existing surface detection of non-ferrous metal strips is generally manual on-line observation. In order to facilitate manual detection, the machine train speed can only be limited within a certain range. Otherwise, the human eye will be difficult to perform the detection task. Therefore, the work efficiency is relatively low, the defect detection rate is low, and the detection result is quite different from the actual defects existing on the surface of the whole roll of strips. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a non-ferrous metal strip detection device. By adopting industrial camera vision detection, it can improve the machine train speed during the transportation of the strips, further improve the work efficiency, and also improve the defect detection rate and the accuracy of the detection result through multiple detections and confirmations. It greatly reduces the difference between the detection result and the actual defects existing on the surface of the whole roll of strips, which is beneficial to improving the overall quality of the product, and can effectively solve the problems in the background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A non-ferrous metal strip detection device, including guide rollers and a strip driven by an external reel to move on the guide rollers. A set of mounting plates and fixing frames are respectively arranged on the upper and lower sides of the strip. At least two sets of fixed cameras are arranged on the mounting plates, and the two sets of fixed cameras are staggered. And a lighting lamp is installed on the fixed camera; A plurality of chutes are evenly opened on the fixing frame, a sliding seat is slidably arranged in the chute, a tracking camera is arranged on the sliding seat, and a driving mechanism for driving the sliding seat to move synchronously with the strip in the chute is arranged on the fixing frame; The fixed cameras and tracking cameras on the upper side of the strip face downward, and the fixed cameras and tracking cameras on the lower side of the strip face upward.

[0005] As a preferred technical solution of the utility model, the driving mechanism includes a plurality of driving motors corresponding to the chutes evenly installed on the side surface of the fixing frame. The output shaft of the driving motor penetrates into the chute and is connected with a driving screw through a coupling. The driving screw is threadedly connected with a threaded hole opened on the side surface of the sliding seat.

[0006] As a preferred technical solution of the present utility model, two groups of ranging sensors corresponding to the sliding seats are symmetrically arranged on the fixing frame.

[0007] As a preferred technical solution of the present utility model, an adjustment lamp is arranged on the tracking camera.

[0008] As a preferred technical solution of the present utility model, two fixing plates are symmetrically installed on the sliding seat. A rotating seat is rotatably arranged between the two fixing plates. A reduction motor is installed on the side surface of one of the fixing plates. The output shaft of the reduction motor penetrates between the two fixing plates and is fixedly connected to the rotating seat. The tracking camera is installed on the rotating seat.

[0009] As a preferred technical solution of the present utility model, an angle sensor is installed on the rotating seat.

[0010] As a preferred technical solution of the present utility model, a plurality of ink boxes are evenly arranged on the upper surface of the end of the fixing frame located on the upper side. A plurality of hoses are evenly arranged on the lower surface of the ink box. The hoses penetrate through the lower surface of the fixing frame and are connected to a marking frame with a hollow interior. The marking frame includes a ring and a cross arranged inside the ring. A plurality of electric push rods corresponding to the ink boxes are evenly installed on the lower surface of the end of the fixing frame. The movable end of the electric push rod is fixedly connected to the upper surface of the cross of the marking frame.

[0011] As a preferred technical solution of the present utility model, a refueling port is arranged on the upper surface of the ink box, and a sealing cover is threadedly connected to the refueling port.

[0012] As a preferred technical solution of the present utility model, a sponge pad communicating with its interior is arranged on the lower surface of the marking frame.

[0013] As a preferred technical solution of the present utility model, a plurality of balls communicating with its interior are evenly arranged on the lower surface of the marking frame.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: An online detection method combining fixed detection and tracking detection is adopted. First, a fixed camera takes a surface photo of the strip and transmits it to an external detection system to be converted into a digital signal and compared with preset data. When no surface quality defect is found, the strip is conveyed normally. When a surface quality defect of the strip is found, a tracking camera is activated to perform tracking detection on the strip, so as to confirm whether there is a quality defect on the strip surface, improving the accuracy of the detection result, reducing the working intensity of the staff, reducing the labor amount, and since industrial camera vision detection is adopted, the machine train speed during strip transportation can be increased, further improving the working efficiency. Through multiple detections and confirmations, the defect detection rate and the accuracy of the detection result are also improved, greatly reducing the difference between the detection result and the defects actually existing on the surface of the entire roll of strip, which is beneficial to improving the overall quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the detection device of the present utility model;

[0016] Figure 2 For the present utility model Figure 1 is a schematic side view structural diagram;

[0017] Figure 3 For the present utility model Figure 1 is a schematic partial structural diagram;

[0018] Figure 4 For the present utility model Figure 1 is a schematic partial structural diagram;

[0019] Figure 5 is a schematic structural diagram of the marking device of the present utility model;

[0020] Figure 6 is a schematic structural diagram of another embodiment of the marking device of the present utility model.

[0021] In the figure: 1 guide roller, 2 strip, 3 mounting plate, 4 fixed camera, 5 lighting lamp, 6 fixing frame, 7 sliding groove, 8 sliding seat, 9 driving motor, 10 driving screw, 11 tracking camera, 12 adjusting lamp, 13 fixing plate, 14 rotating seat, 15 reduction motor, 16 angle sensor, 17 distance measuring sensor, 18 ink box, 19 ink filling port, 20 sealing cover, 21 hose, 22 marking frame, 23 electric push rod, 24 sponge pad, 25 ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-6 , the present invention provides a technical solution: a non-ferrous metal strip detection device, including a guide roller 1 and a strip 2 driven by an external reel to move on the guide roller 1. A set of mounting plates 3 and fixing frames 6 are respectively arranged on the upper and lower sides of the strip 2. At least two sets of fixed cameras 4 are arranged on the mounting plates 3, and the two sets of fixed cameras 4 are arranged staggeredly, so that the shooting area can cover the entire width of the strip 2, avoiding shooting dead angles and improving the detection accuracy.

[0024] A lighting lamp 5 is installed on the fixed camera 4 to improve the ambient brightness and ensure the clarity of the picture taken by the fixed camera 4.

[0025] A plurality of chutes 7 are evenly opened on the fixing frame 6. A sliding seat 8 is slidably arranged in the chute 7. A tracking camera 11 is arranged on the sliding seat 8. The fixed camera 4 and the tracking camera 11 are preferably CCD or CMOS industrial cameras. An online detection method combining fixed detection and tracking detection is adopted. First, the fixed camera 4 takes a surface photo of the strip 2 and transmits it to an external detection system to be converted into a digital signal and compared with the preset data. When no surface quality defect is found, the strip 2 is normally conveyed. When a surface quality defect of the strip is found, the tracking camera 11 is started to perform tracking detection on the strip 2, so as to confirm whether there is a quality defect on the strip surface, improving the accuracy of the detection result, reducing the work intensity of the staff, and reducing the labor volume.

[0026] The fixed cameras 4 and the tracking cameras 11 on the upper side of the strip 2 face downward, and the fixed cameras 4 and the tracking cameras 11 on the lower side of the strip 2 face upward, so that the upper and lower surfaces of the strip 2 can be synchronously detected online.

[0027] Preferred technical solution: A driving mechanism for driving the sliding seat 8 to move synchronously with the strip 2 in the chute 7 is provided on the fixing frame 6. The driving mechanism includes a number of driving motors 9 corresponding to the chute 7 and evenly installed on the side surface of the fixing frame 6. The output shaft of the driving motor 9 penetrates into the chute 7 and is connected to the driving screw 10 through a coupling. The driving screw 10 is threadedly connected to the threaded hole opened on the side surface of the sliding seat 8. The driving motor 9 drives the seat 8 to slide in the chute 7 through the driving screw 10, thereby driving the tracking camera 11 to move synchronously with a partial area of the strip 2 suspected of having surface quality defects for multiple tracking and shooting detections. After the tracking detection is completed, the driving motor 9 reverses, and drives the sliding seat 8 and the tracking camera 11 back to their original positions through the driving screw 10.

[0028] The driving motor 9 is preferably a common servo motor, which is electrically connected to an external detection system and is uniformly controlled by it for switches, rotation speeds, etc., so as to achieve synchronous movement.

[0029] Further preferred technical solution: Two groups of distance measuring sensors 17 corresponding to the sliding seat 8 are symmetrically arranged on the fixing frame 6. The distance measuring sensors 17 are electrically connected to an external detection system. The distance measuring sensors 17 at both ends of the fixing frame 6 are respectively used to detect the distances from the corresponding sliding seat 8 to both ends of the chute 7, so as to judge the position of the tracking camera 11 and automatically control the switches, rotation speeds, etc. of the driving motor 9, further ensuring the synchronous movement of the tracking camera 11 and the strip 2.

[0030] Preferred technical solution: An adjustment lamp 12 is provided on the tracking camera 11. Both the adjustment lamp 12 and the illumination lamp 5 are electrically connected to an external detection system. By adjusting the light intensity and light color of the adjustment lamp 12, the tracking camera can take pictures and make comparisons under different brightness and colors to confirm whether there are defects in the surface area of the strip under tracking detection, thereby eliminating misjudgments caused by external environmental influences.

[0031] Optionally, the sliding seat 8 is provided with an angle adjustment device for adjusting the angle of the tracking camera 11, including two fixing plates 13 symmetrically installed on the sliding seat 8. A rotating seat 14 is rotatably arranged between the two fixing plates 13. A reduction motor 15 is installed on the side surface of one of the fixing plates 13. The output shaft of the reduction motor 15 penetrates between the two fixing plates 13 and is fixedly connected to the rotating seat 14. The tracking camera 11 is installed on the rotating seat 14. The reduction motor 15 can be preferably a common servo reduction motor, which drives the tracking camera 11 to rotate through the rotating seat 14, thereby adjusting its shooting angle. While expanding the shooting range of the tracking camera 11, it also enables the adjacent tracking cameras 11 to shoot the positions with surface quality defects from different angles, further improving the accuracy of the detection results.

[0032] Further optionally, an angle sensor 16 is installed on the rotating seat 14. The angle sensor 16 is used to detect the rotation angle of the rotating seat 14 and transmit corresponding signals to an external detection system. The detection system automatically controls and tracks the rotation angle of the corresponding 11 according to the signals, and the control is more accurate and convenient.

[0033] In a preferred technical solution, a marking device is further included. The marking device includes a plurality of ink boxes 18 uniformly arranged on the upper surface of the end of the fixed frame 6 on the upper side. Erasable ink is stored in the ink boxes 18; a plurality of hoses 21 are uniformly arranged on the lower surface of the ink boxes 18. The hoses 21 pass through the lower surface of the fixed frame 6 and are connected to a marking frame 22 with a hollow interior. The marking frame 22 includes a ring and a cross arranged inside the ring, which is convenient for workers to see after marking the defective area. Since the ink reaches the marking frame 22 under the action of gravity, the marking device is only arranged on the upper side. When the detection system detects a surface quality defect on the lower surface of the strip 2, the corresponding area on the upper surface can be marked through the marking device, and then manually reviewed by the workers.

[0034] Further, a plurality of electric push rods 23 corresponding to the ink boxes 18 are uniformly installed on the lower surface of the end of the fixed frame 6. The movable end of the electric push rod 23 is fixedly connected to the upper surface of the cross of the marking frame 22. The electric push rod 23 can drive the marking frame 22 to move downward, so as to make a mark on the upper surface of the strip, which is convenient for workers to see and manually detect.

[0035] The fixed cameras 4, lighting lamps 5, drive motors 9, tracking cameras 11, adjustment lamps 12, reduction motors 15, angle sensors 16, distance sensors 17, electric push rods 23, etc. used in this application are all commonly used electronic components in the prior art, and their specific structures, working principles, circuit connections, etc. are all well-known technologies.

[0036] For one of the preferred technical solutions, please refer to specifically Figure 5 , a sponge pad 24 communicating with its interior is arranged on the lower surface of the marking frame 22. The internal structures of the marking frame 22 and the sponge pad 24 can adopt a structure similar to a seal. When pressing downward onto the upper surface of the strip 2, ink will be squeezed out onto the sponge pad 24, and the ink will not drip when it remains stationary.

[0037] For another preferred technical solution, please refer to specifically Figure 6 , a plurality of balls 25 communicating with its interior are uniformly arranged on the lower surface of the marking frame 22. The internal structures of the marking frame 22 and the balls 25 can adopt a structure similar to a ballpoint pen. After pressing downward onto the upper surface of the strip 2 and staying for a short while, the strip 2 drives the balls 25 to rotate a short distance, so as to flow out the ink and make a mark.

[0038] Optionally, an external thread is provided on the outer side of the marking frame 22. When the machine stops for a long time, such as during maintenance or shutdown, its lower side can be sealed and protected by a cover or the like.

[0039] Optionally, a refilling port 19 is provided on the upper surface of the ink cartridge 18, and a sealing cover 20 is threadedly connected to the refilling port 19 for adding ink to the ink cartridge 18 and closing the refilling port 19 respectively.

[0040] Further optionally, a liquid level observation device, such as a transparent observation window or a liquid level gauge, is also provided in the ink cartridge 18 to facilitate the staff to replenish the ink for marking in a timely manner.

[0041] The specific detection process of this application is as follows:

[0042] According to the width and thickness of the strip to be detected, etc., adjust the positions of the mounting plate 3 and the fixing frame 6 and the positions of the fixed camera 4 and the tracking camera 11. Driven by an external reel, the strip 2 to be detected moves along the winding direction on the guide roller 1 and passes through the positions of the mounting plate 3 and the fixing frame 6 in sequence. The fixed camera 4 and the tracking camera 11 are preferably CCD or CMOS industrial cameras.

[0043] When the strip 2 passes through the mounting plate 3, the fixed cameras 4 provided on the upper and lower mounting plates 3 respectively take pictures of the upper and lower surfaces of the strip 2, and transmit the taken pictures to an external detection system. After converting the pictures into digital signals by the detection system, they are compared with the pictures of the corresponding strip models preset in the detection system to determine whether there are surface quality defects. The detection system includes a machine vision system based on image processing algorithms commonly used in the prior art. Through computer software and hardware technologies, the image digital signals are processed to extract the required target image feature values, which are compared and analyzed with the preset strip image data, etc. to determine surface quality defects; the strip surface image data preset in the system is obtained by the staff taking pictures of normal strips and strips with different surface quality defects and inputting them into the system. The staff can perform big data training on the detection system by taking a large number of pictures, or during the previous detection process, manually view the pictures taken by each camera through the computer screen and perform manual classification to increase the training and feedback learning of the detection system, etc., so as to improve the accuracy of the automatic online detection of the detection system.

[0044] When performing detection by shooting and comparing with the fixed camera 4, if it is determined that there are no surface quality defects, the tracking detection is not started; if it is determined that there are surface quality defects, the tracking detection is started, the driving mechanism at the corresponding position is turned on, and the tracking camera 11 on the fixing frame 6 is driven to move synchronously with the strip 2. The tracking camera 11 continuously tracks the corresponding defect area on the strip 2, takes multiple groups of photos and transmits them to the external detection system, and compares them with the strip pictures of the corresponding model preset in the detection system again to determine whether there are surface quality defects. By combining the fixed detection and the tracking detection, the detection accuracy of the surface quality defects of the strip is improved.

[0045] When tracking and detecting a partial area of the strip with surface quality defects to be confirmed, the driving mechanisms adjacent to the corresponding position are turned on simultaneously, so as to drive the adjacent tracking cameras 11 to jointly participate in the tracking detection. During the detection process, the shooting angles of these tracking cameras 11 are adjusted through the angle adjustment mechanism, and the area to be confirmed is photographed from multiple directions and angles and transmitted to the external detection system for comparison with the preset strip surface pictures to confirm whether there are surface quality defects, further improving the detection accuracy of the surface quality defects of the strip.

[0046] During the tracking detection process, the brightness and color of the adjustment lamp 12 on the tracking camera 11 are controlled, and whether there are defects in the surface area of the strip under tracking detection is confirmed by taking pictures and comparing under different brightness and colors, so as to eliminate misjudgments caused by the influence of the external environment, further improving the detection accuracy of the surface quality defects of the strip and reducing the workload of the staff.

[0047] When it is confirmed through tracking detection that there are surface quality defects on the strip 2, the defect area is marked by the marking device arranged at the end of the upper fixing frame 6, so as to facilitate the staff to perform manual re-inspection. The staff on the production line only need to observe the marked position with the naked eye, greatly reducing the labor intensity.

[0048] The staff observes the passing strip 2 on the transportation line. When a defect mark is found on the surface of the strip 2, it is observed and rechecked whether there is indeed a surface quality defect at that place. If the result of manual re-inspection is "no", the defect mark on the surface is erased; if the result of manual re-inspection is "yes", the mark is retained for subsequent processing or the machine is immediately stopped for processing.

[0049] A mirror and a lighting lamp are arranged below the strip 2 at the manual detection location. The staff can check whether there are defect marks on the lower surface of the strip 2 through the mirror; different alarms can also be set at the manual detection location, and the corresponding alarms are triggered when the marking device marks the strip surface, so that the staff can know whether the upper surface or the lower surface of the strip 2 is marked with a defect mark, so as to observe it with the naked eye.

[0050] This application adopts an online detection method combining fixed detection and tracking detection. First, a fixed camera 4 takes surface photos of the strip 2 and transmits them to an external detection system to be converted into digital signals for comparison with preset data. When no surface quality defects are found, the strip 2 is transported normally. When surface quality defects of the strip are found, a tracking camera 11 is activated to conduct visual inspections of the strip 2 from multiple angles and under different lighting conditions to confirm the surface quality defects of the strip. When it is determined that there are surface quality defects in this area, marks are made through a marking device. Finally, manual rechecking and corresponding processing are carried out, greatly improving the detection efficiency. At the same time, due to the adoption of industrial camera visual inspection, the train speed during the transportation of the strip 2 can be increased, further improving the work efficiency. Through multiple detections and confirmations, the defect detection rate and the accuracy of the detection results are also improved, significantly reducing the difference between the detection results and the actual defects existing on the surface of the entire coil of strip, which is beneficial to improving the overall quality of the product.

[0051] Parts not disclosed in this utility model are all prior arts, and their specific structures, materials, and working principles will not be elaborated further. Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A non-ferrous metal strip inspection device, comprising a guide roller (1) and a strip (2) driven by an external reel to move on the guide roller (1), characterized in that: A group of mounting plates (3) and a fixing frame (6) are respectively arranged on the upper and lower sides of the strip (2); at least two groups of fixed cameras (4) are arranged on the mounting plate (3); the two groups of fixed cameras (4) are arranged in a staggered manner, and a lighting lamp (5) is installed on the fixed camera (4); a plurality of slide grooves (7) are evenly opened on the fixing frame (6); a sliding seat (8) is slidably arranged in the slide groove (7); a tracking camera (11) is arranged on the sliding seat (8); and a driving mechanism for driving the sliding seat (8) to move synchronously with the strip (2) in the slide groove (7) is arranged on the fixing frame (6); the fixed camera (4) and the tracking camera (11) on the upper side of the strip (2) face downward, and the fixed camera (4) and the tracking camera (11) on the lower side of the strip (2) face upward.

2. The non-ferrous metal strip detection device according to claim 1, characterized in that: The driving mechanism comprises a plurality of driving motors (9) evenly mounted on the side surface of the fixing frame (6) and corresponding to the slide grooves (7); the output shaft of the driving motor (9) penetrates into the slide groove (7) and is connected to the driving screw (10) through a coupling; the driving screw (10) is threadedly connected to a screw hole provided on the side surface of the sliding seat (8).

3. The non-ferrous metal strip detection device according to claim 2, characterized in that: Two groups of distance measuring sensors (17) corresponding to the sliding seat (8) are symmetrically arranged on the fixed frame (6).

4. The non-ferrous metal strip detection device according to claim 2, characterized in that: The tracking camera (11) is provided with an adjustment light (12).

5. The non-ferrous metal strip detection device according to claim 2, characterized in that: Two fixed plates (13) are symmetrically mounted on the sliding seat (8), a rotating seat (14) is rotatably arranged between the two fixed plates (13), a reduction motor (15) is mounted on the side surface of one of the fixed plates (13), an output shaft of the reduction motor (15) penetrates between the two fixed plates (13) and is fixedly connected to the rotating seat (14), and the tracking camera (11) is mounted on the rotating seat (14).

6. The non-ferrous metal strip detection device according to claim 5, characterized in that: An angle sensor (16) is mounted on the rotating seat (14).

7. The non-ferrous metal strip detection device according to claim 1, characterized in that: A plurality of ink tanks (18) are evenly arranged on the upper surface of the end of the fixing frame (6) located on the upper side, and a plurality of hoses (21) are evenly arranged on the lower surface of the ink tanks (18). The hoses (21) pass through the lower surface of the fixing frame (6) and are connected to a marking frame (22) arranged in a hollow interior. The marking frame (22) includes a circular ring and a cross arranged inside the circular ring. A plurality of electric push rods (23) corresponding to the ink tanks (18) are evenly installed on the lower surface of the end of the fixing frame (6), and the movable ends of the electric push rods (23) are fixedly connected to the upper surface of the cross of the marking frame (22).

8. The non-ferrous metal strip detection device according to claim 7, characterized in that: The upper surface of the ink box (18) is provided with an ink filling port (19), and a sealing cover (20) is threadedly connected to the ink filling port (19).

9. The non-ferrous metal strip detection device according to claim 8, characterized in that: The lower surface of the marking frame (22) is provided with a sponge pad (24) which is in communication with the interior thereof.

10. The non-ferrous metal strip detection device according to claim 9, characterized in that: A plurality of rolling balls (25) are evenly arranged on the lower surface of the marking frame (22) and are connected to the interior thereof.

Images