Product defect detection system and method

Abstract

The application relates to the technical field of product defect detection, and discloses a product defect detection system and method, which comprises a feeding mechanism, a rotating disc, a detection device and a discharging mechanism. The feeding mechanism is used for conveying products to a feeding station. The rotating disc is provided with a waiting station and a detection station on two sides. The detection device is used for detecting defects of the products in the detection station. The discharging mechanism is provided with a discharging station and is used for outputting the products in the discharging station. The feeding station, the waiting station and the discharging station are arranged at equal intervals along a conveying direction. The conveying mechanism is used for synchronously taking the products on the feeding station and the waiting station, moving a predetermined distance along the conveying direction, synchronously placing the originally taken products from the feeding station on the waiting station, placing the originally taken products from the waiting station on the discharging station, and finally resetting when the detection device detects defects of the products in the detection station. In the above manner, the efficiency of defect detection on batch products can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of product defect detection technology, specifically to a product defect detection system and method. Background Technology

[0002] With the development of technology, automated inspection methods such as machine vision have been widely used in industrial product inspection. Compared with the limitations of manual inspection, machine vision inspection has greatly improved both production costs and inspection quality and efficiency.

[0003] Currently, most production lines that perform defect detection on products use a conveyor belt to transport products to the inspection station and then stop. Cameras and other inspection devices then perform defect detection on the products at the inspection station. In this method, the entire conveyor belt stops completely during the inspection process. When inspecting batches of products, the conveyor belt moves in a walk-stop-walk-stop state, resulting in relatively low inspection efficiency for the entire production line. Summary of the Invention

[0004] In view of the above problems, this application provides a product defect detection system and method, which can effectively improve the efficiency of defect detection for batch products.

[0005] According to one aspect of the embodiments of this application, a product defect detection system is provided, comprising: a loading mechanism for conveying products to be inspected to a loading station thereon; a turntable rotatably disposed on one side of the loading mechanism along the transport direction, with a waiting station and an inspection station on either side of the turntable, the turntable carrying products and moving the products between the waiting station and the inspection station by rotation; an inspection device disposed at the inspection station for performing defect detection on the products at the inspection station when the turntable is stationary; and an unloading mechanism disposed on the side of the turntable away from the loading mechanism, having an unloading function. The loading station, waiting station, and unloading station are arranged at equal intervals along the transport direction. The transport mechanism is movable along the transport direction. When the inspection device performs defect inspection on the products at the inspection station, the transport mechanism first simultaneously picks up the products from the loading station and waiting station, then moves them a predetermined distance along the transport direction, then simultaneously places the products originally picked up from the loading station into the waiting station, and places the products originally picked up from the waiting station into the unloading station, and finally moves them a predetermined distance in the opposite direction to the transport direction to reset.

[0006] In one alternative, the turntable is used to rotate during the resetting of the transport mechanism to move products that were originally at the inspection station and have been inspected to the waiting station to await the next pick-up by the transport mechanism, while moving products that were originally at the waiting station and have not been inspected to the inspection station for defect detection by the inspection device.

[0007] In one alternative approach, there are multiple turntables, with waiting stations on the multiple turntables arranged at equal intervals along the transport direction. The distances between the loading station and the first waiting station, between two adjacent waiting stations, and between the last waiting station and the unloading station are all equal in the transport direction. A transport mechanism is used to synchronously transport products from the loading station to the first waiting station, products from the previous waiting station to the next waiting station, and products from the last waiting station to the unloading station. Multiple inspection devices are also present, each located at an inspection station on each turntable, and are used to perform different types of defect inspections on the products at each inspection station.

[0008] In one alternative approach, the inspection stations of two adjacent turntables are located on different sides of the straight line where multiple waiting stations are located.

[0009] In one alternative approach, each detection device includes a camera and multiple light sources, with each light source used to illuminate the product from different angles; in each detection device, the camera is used to take pictures of the product when each light source illuminates the product individually.

[0010] In one alternative approach, the unloading mechanism is equipped with a pushing mechanism downstream of the unloading station, which is used to remove products that fail the inspection.

[0011] In one alternative embodiment, the product defect detection system also includes a controller and multiple sensors connected to the controller. The multiple sensors are used to detect whether a product has arrived at the loading station, waiting station, detection station, and pushing mechanism, respectively. The controller is used to control the operation of the conveying mechanism, turntable, detection device, and pushing mechanism according to the trigger signals of the sensors.

[0012] According to another aspect of the embodiments of this application, a product defect detection method is provided, applied to the product defect detection system of any of the above claims. The method includes: controlling a conveying mechanism to simultaneously pick up products from a loading station and a waiting station; controlling the conveying mechanism to move a predetermined distance along the conveying direction; controlling the conveying mechanism to simultaneously place products originally picked up from the loading station into the waiting station and products originally picked up from the waiting station into the unloading station; controlling the conveying mechanism to move a predetermined distance in the opposite direction to the conveying direction to reset; controlling a turntable to rotate so that untested products on the original waiting station are moved to the detection station, while products that have been tested on the original detection station are moved to the waiting station; controlling a detection device to perform defect detection on the products on the detection station, and simultaneously jumping to the step of controlling the conveying mechanism to simultaneously pick up products from the loading station and the waiting station, until the detection is completed.

[0013] In an alternative approach, the method further includes: synchronously controlling the resetting of the conveying mechanism and the rotation of the turntable.

[0014] In one alternative embodiment, the product defect detection system includes multiple turntables and multiple detection devices; controlling the conveying mechanism to synchronously place products originally taken from the loading station to waiting stations, and products originally taken from waiting stations to unloading stations, includes: controlling the conveying mechanism to synchronously place products originally taken from the loading station to the first waiting station, products originally taken from the previous waiting station to the next waiting station, and products originally taken from the last waiting station to the unloading station; controlling the turntables to rotate so that products originally at the waiting stations are moved to the detection station, while products originally at the detection station are detected... The completed products are moved to the waiting station, including: controlling multiple turntables to rotate synchronously so that products originally waiting at the inspection station on each turntable are moved to the inspection station, and products completed at the inspection station are moved to the waiting station; controlling the inspection device to perform defect inspection on the products at the inspection station, and simultaneously switching to the step of controlling the conveying mechanism to simultaneously pick up products from the loading station and the waiting station, until the inspection is completed, including: controlling multiple inspection devices to simultaneously perform defect inspection on products at multiple inspection stations, and simultaneously switching to the step of controlling the conveying mechanism to simultaneously pick up products from the loading station and the waiting station, until the inspection is completed.

[0015] In the product defect detection system provided in this application embodiment, product handling and product detection operate independently. A turntable is selected as the transfer mechanism, with waiting stations and detection stations set on either side of the turntable. The rotation of the turntable allows the products at the waiting and detection stations to move synchronously. Simultaneously, the loading, waiting, and unloading stations are arranged at equal intervals to allow the handling mechanism to pick up multiple products at the same time. In one stroke, products at the loading and waiting stations are simultaneously moved one station backward, improving product handling efficiency. Furthermore, since the handling mechanism and the turntable operate independently, when the turntable is stationary and products at the detection station are being inspected, the handling mechanism continues to move, picking up and placing products at the waiting stations. For batch product inspection, the inspection of the current product does not interfere with the handling of other products, allowing the entire system to operate efficiently and complete defect detection for batches of products.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 This is a modular structure diagram of the product defect detection system provided in an embodiment of the present invention;

[0019] Figure 2 A perspective view of the product defect detection system provided in an embodiment of the present invention;

[0020] Figure 3 A perspective view of the feeding mechanism provided in an embodiment of the present invention;

[0021] Figure 4 A perspective view of the feeding mechanism provided in an embodiment of the present invention;

[0022] Figure 5 A perspective view of the conveying mechanism provided in an embodiment of the present invention;

[0023] Figure 6 and Figure 7 These are two perspective views of the detection device provided in the embodiments of the present invention;

[0024] Figure 8 A cross-sectional view of the fixture provided in an embodiment of the present invention;

[0025] Figure 9 A side view of the first detection device and the display screen provided in an embodiment of the present invention;

[0026] Figure 10 A side view of the second detection device and the display screen provided in an embodiment of the present invention;

[0027] Figure 11 A side view of the third detection device and the display screen provided in an embodiment of the present invention;

[0028] Figure 12 A flowchart of a product defect detection method provided in an embodiment of the present invention;

[0029] Figure 13 A flowchart of a product defect detection method provided in another embodiment of the present invention.

[0030] The reference numerals in the detailed embodiments are as follows:

[0031] 10. Product defect detection system;

[0032] 100. Feeding mechanism; 110. Feeding station; 112. Position adjustment assembly; 1121. Guide component; 113. Blocking assembly; 114. Feeding sensor;

[0033] 200. Handling mechanism; 210. Dating assembly;

[0034] 300. Turntable; 301. First turntable; 302. Second turntable; 303. Third turntable; 310. Waiting station; 311. First waiting station; 312. Second waiting station; 313. Third waiting station; 320. Inspection station; 321. First inspection station; 322. Second inspection station; 323. Third inspection station; 330. Fixture; 331. Transparent glass; 340. First adsorption seat; 350. Second adsorption seat;

[0035] 400. Detection device; 410. First detection device; 411. First column; 412. First camera; 413. First light source group; 4131. High-position ring light source; 4132. Backlight; 420. Second detection device; 421. Second column; 422. Second camera; 423. Second light source group; 4231. Coaxial light source; 4232. First side light source; 430. Third detection device; 431. Third column; 432. Third camera; 433. Third light source group; 4331. Low-position ring light source; 4332. Second side light source;

[0036] 500. Unloading mechanism; 510. Unloading station; 520. Separator; 531. OK end; 532. NG end; 540. Pushing mechanism; 550. Pushing sensor;

[0037] 20. Product; 21. Display screen. Detailed Implementation

[0038] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0044] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0046] In existing product inspection production lines, the conveyor belt needs to frequently switch between conveying and stopping to perform inspection operations. In view of the problem of low inspection efficiency caused by this method, this application considers to improve the design of the product defect detection system from the perspective that the product conveying operation and the inspection operation do not interfere with each other.

[0047] Specifically, this application adopts a method where product handling and product inspection operate independently. A turntable is selected as the transfer mechanism, with waiting stations and inspection stations set on either side of the turntable. The rotation of the turntable allows the products at the waiting and inspection stations to move synchronously. Simultaneously, the loading, waiting, and unloading stations in the system are arranged at equal intervals, allowing the handling mechanism to pick up multiple products at the same time. In one stroke, products at the loading and waiting stations are simultaneously moved one station backward, improving product handling efficiency. Furthermore, since the handling mechanism and the turntable operate independently, when the turntable is stationary and products at the inspection station are being inspected, the handling mechanism continues to move, picking up and placing products at the waiting stations. For batch product inspection, the inspection operation of the current product does not interfere with the handling operation of other products, allowing the entire system to operate efficiently and complete defect detection for batch products.

[0048] According to one aspect of the embodiments of this application, a product defect detection system is provided, please refer to [the specific details]. Figure 1 and Figure 2 , Figure 1 The diagram shows the modular structure of the product defect detection system. Figure 2 The figure shows a perspective view of the product defect detection system. As shown in the figure, the product defect detection system 10 includes a loading mechanism 100, a conveying mechanism 200, a turntable 300, a detection device 400, and a unloading mechanism 500.

[0049] The feeding mechanism 100 is used to transport the products to be inspected to the feeding station 110. Specifically, the feeding mechanism 100 can be a roller type or a conveyor belt type, and the feeding station 110 can be set at the output end of the feeding mechanism 100.

[0050] Please see Figure 3 The specific structure of the feeding mechanism 100 shown in the figure includes a position adjustment component 112 at the front end of the feeding station 110. The position adjustment component 112 adjusts the distance between two guide members 1121, guiding the product 20 passing between the two guide members 1121 to the middle feeding station 110. Furthermore, a blocking component 113 can be provided at the rear end of the feeding station 110. The blocking component 113 can be adjusted in position along the conveying direction of the feeding mechanism 100 to block the product 20 at the desired position in the feeding station 110.

[0051] For some intelligent work scenarios, such as Figure 3 As shown, a loading sensor 114 can be installed at the loading station 110. When the loading sensor 114 is triggered, it indicates that the product 20 has arrived at the loading station 110, thus automatically controlling the handling operation of subsequent mechanisms based on the triggering status of the loading sensor 114. The loading sensor 114 can be used as follows: Figure 3 The setting shown is on the blocking component 113, but it can also be set at other positions at the loading station 110, as long as it can ensure that the product 20 at the loading station 110 is triggered.

[0052] The turntable 300 is rotatably mounted on one side of the feeding mechanism 100 along the conveying direction, as shown by the double-headed arrow on the turntable 300 in the figure. The turntable 300 can rotate clockwise or counterclockwise, which is not limited here. The two sides of the turntable 300 are the waiting station 310 and the inspection station 320, respectively. The turntable 300 is used to carry the product 20 and moves the product 20 between the waiting station 310 and the inspection station 320 by rotating.

[0053] The inspection device 400 is installed at the inspection station 320 and is used to perform defect inspection on the products at the inspection station 320 when the turntable 300 is stationary. Taking machine vision inspection as an example, the inspection device 400 may include a camera and a light source. The light source illuminates the product 20 and the camera takes a picture of the product 20. After analyzing the image, it is determined whether there are defects in the product 20.

[0054] The unloading mechanism 500 is located on the side of the turntable 300 opposite to the loading mechanism 100. The unloading mechanism 500 has an unloading station 510, which is used to output the products from the unloading station 510. The unloading mechanism 500 can also be a roller type or a conveyor belt type conveying mechanism, and the unloading station 510 can be located at the input end of the unloading mechanism 500.

[0055] Please see Figure 4The specific structure of the unloading mechanism 500 shown in the figure is such that, in order to easily distinguish between qualified and unqualified products, a separator 520 can be provided at the output end of the unloading mechanism 500. The separator 520 divides the output end of the unloading mechanism 500 into an OK end 531 and an NG end 532. The unloading station 510 and the OK end 531 are arranged opposite to each other along the discharge direction of the unloading mechanism 500, so that qualified products on the unloading station 510 can be conveyed to the OK end 531 through the unloading mechanism 500. In the specific embodiment shown in the figure, the discharge direction and the conveying direction are the same, both of which are the direction shown by arrow X in the figure. Of course, in other embodiments, the two can be different directions. The unloading mechanism 500 is provided with a pushing mechanism 540 upstream of its output end. The pushing mechanism 540 is used to push the unqualified products 20 on the unloading mechanism 500 to a position opposite to the NG end 532 along the discharge direction, so that the unqualified products 20 can be conveyed to the NG end 532 through the unloading mechanism 500, thereby rejecting the unqualified products 20. In addition to separating the OK end 531 and NG end 532 with the separator, the pushing mechanism 540 can also be equipped with a robotic arm, transfer mechanism, etc., and the defective products can be removed by transferring them to other positions.

[0056] For scenarios involving intelligent operations, such as Figure 4 As shown, a pusher sensor 550 can be set at the front end of the pusher mechanism 540. When the pusher sensor 550 detects that a defective product 20 has passed by, the pusher mechanism 540 can be automatically controlled to extend to push the defective product 20 to a position opposite to the NG end 532, and then be conveyed to the NG end 532 by the unloading mechanism 500.

[0057] exist Figure 1 In the specific embodiment shown, there are three turntables 300. The loading station 110, the unloading station 510, and the waiting stations 310 of the three turntables 300 are arranged in the direction shown by arrow X. In the direction shown by arrow X, the distance between the loading station 110 and the first waiting station 310 (the leftmost waiting station 310 in the figure) is L1, the distances between two adjacent waiting stations 310 are L2 and L3 respectively, and the distance between the last waiting station 310 (the rightmost waiting station 310 in the figure) and the unloading station 510 is L4. L1 = L2 = L3 = L4.

[0058] To minimize space usage, such as Figure 1 As shown, the detection stations 320 of two adjacent turntables 300 are respectively located on the straight line where multiple waiting stations 310 are located ( Figure 1 The dotted lines in the middle are on different sides. This arrangement not only makes the layout of multiple turntables 300 more compact, but also ensures that there is a large space around each inspection station 320 to arrange the inspection device 400.

[0059] The conveying mechanism 200 is movable in the direction indicated by arrow X. The conveying mechanism 200 is used to synchronously move the product 20 from the loading station 110 to the first waiting station 310, and move the product 20 from the previous waiting station 310 to the first waiting station 310. Figure 1 Product 20 (the leftmost of two adjacent waiting stations 310) is moved to the next waiting station 310. Figure 1 The middle position is the rightmost of two adjacent waiting stations 310. The product 20 from the last waiting station 310 is moved to the unloading station 510. The solid line in the figure represents the initial position of the conveying mechanism 200, that is, the position when the product 20 is picked up from the loading station 110 and the waiting station 310. The dashed line represents the position of the conveying mechanism 200 after moving in the direction indicated by arrow X, that is, the position when the product 20 is placed in the waiting station 310 and the unloading station 510. For ease of display, the solid and dashed lines in the figure are slightly misaligned, which does not mean that the conveying mechanism 200 has made corresponding movements.

[0060] Please see Figure 5 The conveying mechanism 200 shown in the figure has four docking components 210 arranged along the direction of arrow X. These four docking components 210 can be a liftable dual-nozzle structure as shown in the figure. The dual-nozzle structure can prevent the product 20 from rotating while adsorbing it. Of course, the docking components 210 can also be robotic arms, suction cups, or other structures; no specific limitation is made here. Furthermore, the four docking components 210 can be lifted and lowered independently, or they can be fixed to the same component and lifted and lowered synchronously with that component.

[0061] Correspondingly, the detection device 400 can also be set to three, and is respectively set at the detection station 320 of each turntable 300, and is used to perform different types of defect detection on the product 20 at each detection station 320, so as to achieve a more comprehensive detection of the product 20.

[0062] When all turntables 300 are stationary and all testing devices 400 are testing the product 20 at testing station 320, the conveying mechanism 200 performs conveying operations, specifically as follows: Figure 1 As shown, during transport, the transport mechanism 200 is initially positioned as indicated by the solid line. In this position, the four docking components 210 descend and retrieve the products 20 from the loading station 110 and waiting station 310 respectively. After retrieval, the docking components 210 rise, and the transport mechanism 200 moves along the direction of arrow X to the position indicated by the dashed line. Then, the docking components 210 descend and place the products 20 on them onto the waiting station 310 and unloading station 510. After all placements are completed, the transport mechanism 200 moves in the opposite direction to arrow X to reset, preparing for the next retrieval. During one transport cycle, except for the unloading station 510... Figure 1 Products at all other workstations traversed by the dotted line are moved one workstation to the right. The transport mechanism 200 places products 20 at each waiting workstation 310. After the inspection device 400 completes inspection of the products at the inspection workstation 320, the turntable 300 rotates, moving products 20 that have not yet undergone inspection to the corresponding inspection workstation 320. Products 20 that have completed inspection are moved back to the waiting workstation 310. Then, the inspection device 400 continues to inspect newly arrived products at the inspection workstation 320, and the transport mechanism 200 moves again, moving each product 20 one workstation to the right. This process repeats, achieving high-efficiency inspection of batch products 20.

[0063] Specifically, taking defect detection of a display screen as an example, please refer to [link to relevant documentation]. Figure 6 and Figure 7 The specific structure of the detection device shown includes the first turntable 301. Figure 1 A clamp 330 can be installed on the leftmost turntable 300. The clamp 330 is used to hold the display screen 21, and as follows: Figure 8 The cross-section shows the screen 21 supported by a translucent glass 331 at its bottom. A light-transmitting opening is provided on the first turntable 301 opposite the clamp 330 (this opening is obscured by the clamp 330 in the diagram). Please refer to further details. Figure 9 The first detection device 410 (and Figure 1 The detection device 400 corresponding to the leftmost detection station 320 includes a first column 411, a first camera 412, and a first light source group 413. The first column 411 is fixed to the first detection station 321. Figure 1 At the leftmost inspection station 320, a first camera 412 is vertically connected to the first column 411 and faces the first inspection station 321. The first light source group 413 includes a high-position ring light source 4131 and a backlight source 4132. The high-position ring light source 4131 is vertically connected to the first column 411 and is located below the first camera 412. The backlight source 4132 is located at the bottom of the light-transmitting port on the first turntable 301. The first camera 412 is used to take pictures and images when the high-position ring light source 4131 and the backlight source 4132 illuminate the display screen 21 on the fixture 330 separately. To meet the lighting requirements of different display screens 21, the first camera 412 and the high-position ring light source 4131 can be raised or lowered to the required height for lighting and imaging. After the high-position ring light source 4131 illuminates the display screen 21 and the first camera 412 takes a picture, the machine recognition algorithm analyzes the image to detect whether there are bubbles, rough edges, etc. on the film of the display screen 21. The backlight 4132 illuminates the display screen 21 to detect whether there are defects on the edge of the display screen 21.

[0064] In the fixture 330, since it is supported at the bottom of the display screen 21 by the light-transmitting glass 331, when the backlight 4132 shines light on the display screen 21, the light can penetrate the light-transmitting glass 331 and completely cover the display screen 21, thereby ensuring the accuracy of the detection.

[0065] Please continue reading. Figure 6 and Figure 7 and further combine Figure 10 Second turntable 302 ( Figure 1 A first adsorption seat 340 can be set on the central turntable 300. The first adsorption seat 340 is used to adsorb the display screen 21 through negative pressure. The second detection device 420 includes a second column 421, a second camera 422, and a second light source group 423. The second column 421 is fixed to the second detection station 322. Figure 1 At the central inspection station 320, a second camera 422 is vertically connected to a second column 421 and faces the second inspection station 322. A second light source group 423 includes a coaxial light source 4231 and a first side light source 4232. The coaxial light source 4231 is vertically connected to the second column 421 and located below the second camera 422. The first side light source 4232 faces the second inspection station 322 and illuminates the first side of the display screen 21 on the first adsorption seat 340. The second camera 422 takes pictures when the coaxial light source 4231 and the first side light source 4232 illuminate the display screen 21 on the first adsorption seat 340 individually. Similarly, before the inspection operation, the second camera 422 and the coaxial light source 4231 are adjusted to a suitable height for the display screen 21 to be inspected. After the coaxial light source 4231 illuminates and images the display screen 21, it can detect whether there are defects or flaws on the surface of the display screen. The first side light source 4232 illuminates and images the first side of the display screen 21, which can more accurately detect whether there are defects on the first side.

[0066] On the second turntable 302, the display screen 21 is fixed by the first adsorption seat 340, which can make the side edge of the display screen 21 completely exposed. This ensures that when the first side light source 4232 shines on the first side of the display screen 21, the light can normally cover the complete side of the display screen 21, thereby ensuring the effect of the second camera 422 in taking pictures and imaging, so as to provide a guarantee for subsequent defect detection and analysis.

[0067] Please continue reading. Figure 6 and Figure 7 and further combine Figure 11 The third turntable 303 ( Figure 1The rightmost turntable 300 is equipped with a second adsorption seat 350 identical to the first adsorption seat 340. The third detection device 430 includes a third column 431, a third camera 432, and a third light source group 433. The third column 431 is fixed to the third detection station 323. Figure 1 At the rightmost inspection station 320, a third camera 432 is vertically connected to the third column 431 and faces the third inspection station 323. The third light source group 433 includes a low-position ring light source 4331 and a second side light source 4332. The low-position ring light source 4331 is vertically connected to the third column 431 and located below the third camera 432. The second side light source 4332 faces the third inspection station 323 and is used to illuminate the second side of the display screen 21 on the second adsorption seat 350. The third camera 432 is used to take pictures when the low-position ring light source 4331 and the second side light source 4332 illuminate the display screen 21 on the second adsorption seat 350 individually. Illuminating the display screen 21 with the low-position ring light source 4331 can detect whether the edge of the film on the display screen 21 is warped, etc. Illuminating the second side of the display screen 21 with the second side light source 4332 can more accurately detect whether there are defects on the second side.

[0068] It should be noted that the first side and the second side of the display screen 21 are opposite sides. That is, during the inspection, the first side light source 4232 and the second side light source 4332 illuminate the opposite sides of the display screen 21 respectively, thereby achieving a more comprehensive defect detection of the display screen 21.

[0069] In the specific embodiment shown in the accompanying drawings, three turntables 300 and three detection devices 400 are provided. Each detection device 400 includes a camera and multiple light sources. Each light source illuminates the product from different angles. For each detection device 400, the camera takes pictures of the product when each light source illuminates it individually, thereby achieving a more comprehensive defect detection of the display screen 21. Furthermore, the loading station 110, three waiting stations 310, and the unloading station 510 are arranged at equal intervals along the transport direction. This allows the transport mechanism 200 to simultaneously move the loading station 110 and all waiting stations 310 one station backward in a single movement, thereby improving the efficiency of product 20 transfer. Simultaneously, all detection devices 400 can simultaneously inspect the products 20 on their respective detection stations 320. During inspection, the turntables 300 are stationary, and the transport mechanism 200 can simultaneously pick up and place products 20 on the waiting stations 310, thus significantly improving the efficiency of defect detection for batch products 20.

[0070] The above is only one implementation of the detection device 400 provided for the detection of the display screen 21 in this application embodiment. In other embodiments, the number and layout of the turntable 300 and the detection device 400 can be designed according to the needs of different types of display screens or other types of products to be detected.

[0071] For example, in addition to the embodiments shown in the attached figures, depending on the specific product testing requirements, the turntable 300 and the testing device 400 may each be set to only one. Correspondingly, the loading station 110, the waiting station 310 and the unloading station 510 are arranged at equal intervals along the transport direction. During one movement of the transport mechanism 200, the product at the loading station 110 can be transported to the waiting station 310 simultaneously, and the product originally at the waiting station 310 can be transported to the unloading station 510. When the turntable 300 is stationary, the inspection device 400 performs defect inspection on the product 20 at the inspection station 320. At the same time, the transport mechanism 200 simultaneously transports the inspected product 20 from the waiting station 310 to the unloading station 510 and the product from the loading station 110 to the empty waiting station 310. After the transport is completed, the transport mechanism 200 resets. After the inspection is completed, the turntable 300 rotates, transferring the uninspected product 20 from the waiting station 310 to the inspection station 320, and the inspected product 20 from the inspection station 320 to the waiting station 310. Then, the inspection device 400 inspects the newly arrived product at the inspection station 320, and the transport mechanism 200 simultaneously transports the inspected product from the waiting station 310 to the unloading station 510 and the product from the loading station 110 to the empty waiting station 310. This process is repeated to achieve efficient inspection of batch products 20.

[0072] When the conveying mechanism 200 picks up and places the product 20, the turntable 300 needs to remain stationary. In order to further reduce time and improve efficiency, the turntable 300 can rotate during the reset process of the conveying mechanism 200, so that the time for the turntable 300 to complete rotation is basically the same as the time for the conveying mechanism 200 to complete reset. Thus, the conveying mechanism 200 can directly enter the next product picking and placing operation without waiting after reset.

[0073] Furthermore, considering that the turntable 300 needs to remain stationary when the conveying mechanism 200 picks up and places the product 20, and that the detection device 400 also needs to remain stationary when performing defect detection on the product 20, by comprehensively considering the settings of the movement and working frequency of each component, the time required for the detection device 400 to detect and the time required for the conveying mechanism 200 to pick up and place the product can be set to be basically equal, so as to achieve the effect of smooth and uninterrupted movement of each component.

[0074] When the turntable 300 rotates during the reset process of the conveying mechanism 200, and the time required for the detection device 400 to detect is set to be basically equal to the time required for the conveying mechanism 200 to pick up the product and place the product, then in the entire product defect detection system 10, each component operates according to a certain rhythm, and there is basically no extra pause or waiting between two adjacent rhythms, thereby achieving the best detection efficiency.

[0075] In the specific embodiment shown in the accompanying drawings, the waiting station 310 and the inspection station 320 on the turntable 300 are located on opposite sides of the turntable 300, and the turntable 300 is rotated 180° to interchange the products 20 on the waiting station 310 and the inspection station 320. In addition, multiple workstations can be set around the turntable 300. Among these workstations, one is a waiting workstation 310, one is an inspection workstation 320, and the remaining workstations between the waiting workstation 310 and the inspection workstation 320 are transfer workstations. The turntable 300 always rotates in the same direction. When the turntable 300 is stationary, the inspection device 400 inspects the product 20 at the inspection workstation 320. The transport mechanism 200 picks up the inspected product 20 at the waiting workstation 310 and places the uninspected product 20 there. After the inspection and placement of the product are completed, the turntable 300 rotates by a predetermined angle so that the uninspected product 20 that was originally at the transfer workstation after the inspection workstation 320 is moved to the inspection workstation 320 for inspection, and the product 20 that was originally at the transfer workstation after the waiting workstation 310 is moved to the waiting workstation 310 and waits to be picked up and transported by the transport mechanism 200.

[0076] To achieve fully automated inspection operations, the product defect detection system 10 may also include a controller and multiple sensors connected to the controller. In addition to the loading sensor 114 mentioned above for detecting whether product 20 is in place at the loading station 110 and the pushing sensor 550 for detecting whether defective products are in place at the pushing mechanism 540, the multiple sensors also include other sensors for detecting whether products are in place at the waiting station 310 and the inspection station 320. The controller is used to control the operation of the conveying mechanism 200, the turntable 300, the inspection device 400 and the pushing mechanism 540 according to the trigger signals of the corresponding sensors.

[0077] Specifically, for the method of using negative pressure adsorption to pick up and fix product 20, the change in pressure in the negative pressure pipeline can be detected by a sensor to determine whether the product is fixed in place. For other methods, fiber optic sensors can be used to detect whether the product is in place.

[0078] According to another aspect of the embodiments of this application, a product defect detection method is provided, which is applied to the product defect detection system 10 in any of the above embodiments. Please refer to [link to relevant documentation]. Figure 12The method includes:

[0079] Step 610: Control the conveying mechanism 200 to simultaneously pick up the product 20 from the loading station 110 and the waiting station 310.

[0080] Step 620: Control the conveying mechanism 200 to move a predetermined distance along the conveying direction.

[0081] Specifically, the predetermined distance is equal to the distance between the loading station 110 and the waiting station 310, that is... Figure 1 L1 in the middle.

[0082] Step 630: Control the conveying mechanism 200 to simultaneously place the product 20 originally taken from the loading station 110 to the waiting station 310, and place the product 20 originally taken from the waiting station 310 to the unloading station 510.

[0083] Step 640: Control the conveying mechanism 200 to move the predetermined distance in the opposite direction to the conveying direction to reset.

[0084] Step 650: Control the turntable 300 to rotate so that the untested product 20 on the original waiting station 310 is moved to the testing station 320, and at the same time the tested product 20 on the original testing station 320 is moved to the waiting station 310.

[0085] Step 660: Control the detection device 400 to perform defect detection on the product 20 at the detection station 320, and simultaneously jump to step 610 until the detection is completed.

[0086] The product defect detection method provided in this application embodiment, when applied to the product defect detection system 10 provided in any of the above embodiments, enables the transport mechanism 200 to move normally and pick up and place the product 20 at the waiting station 310 when the turntable 300 is stationary and the product on the detection station 320 is being detected by the detection device 400. For the detection of batch products, the detection operation of the current product does not affect the transport operation of other products, and the entire system can operate efficiently and complete the defect detection of batch products.

[0087] To further improve work efficiency, steps 640 and 650 can be executed simultaneously.

[0088] For the product defect detection system 10, which includes multiple turntables 300 and multiple detection devices 400, the above step 630 may include: controlling the conveying mechanism 200 to simultaneously place the product 20 originally taken from the loading station 110 to the first waiting station, place the product 20 originally taken from the previous waiting station to the next waiting station, and place the product 20 originally taken from the last waiting station to the unloading station 510.

[0089] Among them, the first waiting station is the waiting station 310 closest to the loading station 110, the last waiting station is the waiting station 310 closest to the unloading station 510, the preceding waiting station is the one that is further forward in the transport direction among two adjacent waiting stations 310, and the following waiting station is the one that is further back in the transport direction among two adjacent waiting stations 310.

[0090] Step 650 above includes: controlling multiple turntables 300 to rotate synchronously, so that the product 20 originally waiting at station 310 on each turntable 300 is moved to inspection station 320, and at the same time, the product 20 that has been inspected on the original inspection station 320 is moved to waiting station 310.

[0091] Step 660 above includes: controlling multiple detection devices 400 to simultaneously perform defect detection on products 20 at multiple detection stations 320, and simultaneously jumping to step 610 above until the detection is completed.

[0092] In this embodiment, for the arrangement of multiple turntables 300 and multiple detection devices 400, by controlling the synchronous rotation of multiple turntables 300 and controlling the simultaneous detection of multiple detection devices 400, the time required for detection operations can be significantly reduced, thereby further improving detection efficiency.

[0093] Finally, this application embodiment also provides an intelligent and fully automated product defect detection method. For this method, the product defect detection system 10 needs to be equipped with a controller and multiple sensors connected to the controller. These sensors are triggered when a product arrives at the loading station 110, each waiting station 310, each detection station 320, and the pushing mechanism 540. Figure 1 , Figure 6 and Figure 7 Taking the specific setup shown as three turntables 300 (first turntable 301, second turntable 302, and third turntable 303) as an example, correspondingly, there are also three waiting stations 310: first waiting station 311, second waiting station 312, and third waiting station 313; three inspection stations 320: first inspection station 321, second inspection station 322, and third inspection station 323; and three inspection devices 400: first inspection device 410, second inspection device 420, and third inspection device 430. After inspection begins, the feeding mechanism 100 first conveys a batch of products 20 to the feeding station 110. When the first product arrives at the feeding station 110, the controller begins to execute the defect detection method for that product. For details, please refer to [link to relevant documentation]. Figure 13 In the diagram, for ease of illustration, the textual descriptions of some steps have been simplified. The method specifically includes the following steps:

[0094] Step 710: Determine whether the sensor at the loading station 110 has been triggered. If so, proceed to step 720.

[0095] Step 720: Control the conveying mechanism 200 to move the product 20 from the loading station 110 to the first waiting station 311 and then reset it.

[0096] Step 730: Control the first turntable 301 to rotate so that the product 20 of the first waiting station 311 is moved to the first inspection station 321.

[0097] Step 740: When the sensor at the first inspection station 321 detects that a product 20 has arrived, the first inspection device 410 is controlled to illuminate and photograph the product 20 at the first inspection station 321, and then the image is processed to identify defects in the product 20 and record the status of the product 20.

[0098] Step 750: Control the first turntable 301 to rotate so that the product 20 of the first inspection station 321 is moved to the first waiting station 311. After step 750 is completed, perform the following step 810.

[0099] It should be noted that if a new product 20 arrives at the loading station 110 while the above step 740 is being executed, the above step 710 will be executed again, which is equivalent to starting another set of the same process simultaneously.

[0100] If another process starts simultaneously, step 720 in the previous process will be performed concurrently with step 740 in the subsequent process to reduce time and improve inspection efficiency. Furthermore, step 750 in the previous process and step 730 in the subsequent process will be combined into one step: controlling the first turntable 301 to rotate so that the uninspected product 20 originally on the first waiting station 311 is moved to the first inspection station 321, while the inspected product 20 originally on the first inspection station 321 is moved to the first waiting station 311.

[0101] Step 810: Determine whether the sensor at the first waiting station 311 has been triggered. If so, proceed to step 820.

[0102] Step 820: Control the conveying mechanism 200 to move the product 20 from the first waiting station 311 to the second waiting station 312 and then reset it.

[0103] Similarly, if a new product 20 arrives at the loading station 110, the same process will start again. Then, step 720 in the previous process will be combined with step 820 in the later process into one step, namely: control the conveying mechanism 200 to simultaneously move the product 20 of the first waiting station 311 to the second waiting station 312, and move the product 20 of the loading station 110 to the first waiting station 311 and then reset it.

[0104] Step 830: Control the second turntable 302 to rotate so that the product 20 of the second waiting station 312 is moved to the second inspection station 322.

[0105] Step 840: When the sensor at the second inspection station 322 senses that a product 20 has arrived, the second inspection device 420 is controlled to illuminate and photograph the product 20 at the second inspection station 322, and the image is processed to identify defects in the product 20 and record the status of the product 20.

[0106] Step 850: Control the second turntable 302 to rotate, so that the product 20 of the second inspection station 322 is moved to the second waiting station 312. After step 850 is completed, perform the following step 910.

[0107] Similarly, when multiple such processes are running simultaneously, step 840 in the previous process will be performed synchronously with step 820 in the next process. Furthermore, step 850 in the previous process and step 830 in the next process will be combined into one step. In addition, the first turntable 301 and the second turntable 302 can also rotate synchronously, meaning steps 730 and 750 in different processes can be combined into one step, and steps 830 and 850 in different processes can be combined into one step. These two combined steps can then be performed synchronously, meaning the first turntable 301 and the second turntable 302 can rotate synchronously to better save time.

[0108] The procedure for the third turntable 303 described later is the same as the procedure for the first turntable 301 and the second turntable 302 described above, and will not be repeated hereafter.

[0109] Step 910: Determine whether the sensor at the second waiting station 312 has been triggered. If so, proceed to step 920.

[0110] Step 920: Control the conveying mechanism 200 to move the product 20 from the second waiting station 312 to the third waiting station 313 and then reset it.

[0111] Step 930: Control the rotation of the third turntable 303 so that the product 20 of the third waiting station 313 is moved to the third inspection station 323.

[0112] Step 940: When the sensor at the third inspection station 323 detects that product 20 has arrived, the third inspection device 430 is controlled to illuminate and photograph product 20 at the third inspection station 323. The image is then processed to identify defects in product 20 and record its status. The status of product 20 may include OK and NG.

[0113] Step 950: Control the rotation of the third turntable 303 so that the product 20 of the third inspection station 323 is moved to the third waiting station 313. After step 950 is completed, perform the following step 1010.

[0114] Step 1010: Determine whether the sensor at the third waiting station 313 has been triggered. If so, proceed to step 1020.

[0115] Step 1020: Control the conveying mechanism 200 to move the product 20 from the third waiting station 313 to the unloading station 510 and then reset it.

[0116] Similarly, when multiple processes are running simultaneously, step 1020 in a later process can be combined with steps 720, 820, and 920 in the preceding processes into a single step. That is, the handling mechanism 200 can simultaneously handle all processes except for the unloading station 510. Figure 1 Products from all workstations traversed by the midpoint line are moved one workstation backward.

[0117] Step 1030: When the sensor at the pusher mechanism 540 is triggered, read the status of product 20 at the pusher mechanism 540.

[0118] If the status of product 20 is OK, the pusher mechanism 540 will not work, and product 20 will be conveyed to the unloading mechanism 500. Figure 4 The OK terminal 531 is shown in the figure.

[0119] If the status of product 20 is NG, then step 1040 is executed: control the pushing mechanism 540 to push product 20 forward, and product 20 is conveyed to the unloading mechanism 500. Figure 4 The NG terminal 532 is shown.

[0120] In the product defect detection methods provided in the above embodiments, when many identical processes are performed simultaneously, a [method / system] is formed. Figure 12 The method shown in the diagram enables the components of the product defect detection system 10 to move or work in an orderly manner according to a predetermined rhythm, thereby enabling efficient handling and inspection of batches of products 20.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A product defect detection system, characterized by, The application relates to a product detection device. The device comprises: a feeding mechanism for feeding products to be detected to a feeding station; a rotating disc rotatably arranged on one side of the feeding mechanism along a conveying direction, two sides of the rotating disc being a waiting station and a detection station respectively, the rotating disc being used for carrying products and moving the products between the waiting station and the detection station through rotation; a detection device arranged at the detection station and used for detecting defects of the products at the detection station when the rotating disc is static; a discharging mechanism arranged on a side of the rotating disc away from the feeding mechanism and having a discharging station, the discharging mechanism being used for discharging the products at the discharging station, wherein the feeding station, the waiting station and the discharging station are arranged at equal intervals along the conveying direction; a conveying mechanism movably arranged along the conveying direction, the conveying mechanism being used for synchronously taking the products at the feeding station and the waiting station, moving a predetermined distance along the conveying direction, then synchronously placing the originally taken products at the feeding station on the waiting station and placing the originally taken products at the waiting station on the discharging station, and finally moving the predetermined distance in the direction opposite to the conveying direction to reset; the rotating disc is used for rotating in the process of resetting of the conveying mechanism to move the products originally at the detection station and detection completed to the waiting station and wait for the next taking of the conveying mechanism, and to move the products originally at the waiting station and not detected to the detection station to be detected by the detection device; a plurality of rotating discs are arranged, the waiting stations of the plurality of rotating discs are arranged at equal intervals along the conveying direction, and the distance between the feeding station and the first waiting station, the distance between adjacent two waiting stations and the distance between the last waiting station and the discharging station are equal along the conveying direction; the conveying mechanism is used for synchronously conveying the products at the feeding station to the first waiting station, conveying the products at the previous waiting station to the next waiting station, and conveying the products at the last waiting station to the discharging station; 2. The product defect detection system of claim 1, wherein a plurality of detection devices are arranged at the detection stations of the rotating discs respectively and used for detecting different types of defects of the products at the detection stations.

3. The product defect detection system of claim 1, wherein The detection stations of adjacent two rotating discs are located on two sides of a straight line on which the plurality of waiting stations are arranged. Each detection device comprises a camera and a plurality of light sources, and each light source is used for irradiating the products from different angles; 4. The product defect detection system of claim 3, wherein in each detection device, the camera is used for taking images of the products when the products are irradiated by the light sources respectively. The discharging mechanism is provided with a pushing mechanism downstream of the discharging station, the pushing mechanism being used for rejecting the products that are not detected to be qualified.

5. The product defect detection system of claim 4, wherein The product defect detection system further comprises a controller and a plurality of sensors connected to the controller, the plurality of sensors are respectively used for detecting whether there is a product in place at the feeding station, the waiting station, the detection station and the pushing mechanism, and the controller is used for controlling the carrying mechanism, the rotating disc, the detection device and the pushing mechanism to work according to the triggering signals of the sensors.

6. A product defect detection method characterized by, The product defect detection system is applied to any one of claims 1-5, and the product defect detection system comprises a plurality of rotating discs and a plurality of detection devices; the method comprises: controlling the carrying mechanism to synchronously take the products from the feeding station and the waiting station; controlling the carrying mechanism to move a predetermined distance along the carrying direction; controlling the carrying mechanism to synchronously place the products originally taken from the feeding station on the first waiting station, place the products originally taken from the previous waiting station on the next waiting station, and place the products originally taken from the last waiting station on the unloading station; controlling the carrying mechanism to move the predetermined distance in the direction opposite to the carrying direction to reset; controlling a plurality of rotating discs to synchronously rotate, so that the products originally in the waiting station on each rotating disc are moved to the detection station, and the products originally in the detection station after detection are moved to the waiting station; controlling a plurality of detection devices to simultaneously detect the products in a plurality of detection stations for defects, and jumping to the step of controlling the carrying mechanism to synchronously take the products from the feeding station and the waiting station until the detection is completed.

7. The product defect detection method according to claim 6, characterized by, The method further comprises: synchronously controlling the carrying mechanism to reset and the rotating disc to rotate.

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