A liquid detection device based on visual recognition

Abstract

The application belongs to the technical field of intelligent manufacturing, and particularly relates to a liquid detection device based on visual identification, which comprises a driving assembly, a fixing assembly and a visual detection module. The driving assembly is used for driving the rotation of an observation tube to obtain different detection orientations. The fixing assembly is used for the fixation of both ends of the observation tube. The fixing assembly comprises an inlet fixing assembly and an outlet fixing assembly. The inlet fixing assembly is arranged on the inlet side of the observation tube and is used for the mounting and fixation of an inlet pipe. The outlet fixing assembly is arranged on the outlet side of the observation tube and is used for the mounting and fixation of an outlet pipe. The visual detection module is used for image acquisition of the observation tube to identify whether the liquid in the observation tube has bubbles or impurities. The driving assembly is arranged to rotate the observation tube, the liquid flowing through the observation tube can be visually detected from multiple angles, and thus bubbles or impurities in the glue can be found before dispensing, so that the dispensing quality can be improved.

Description

Technical Field

[0001] This invention belongs to the field of intelligent manufacturing technology, and in particular relates to a liquid detection device based on visual recognition. Background Technology

[0002] Dispensing, also known as gluing, coating, potting, or dripping, is a process that involves applying, potting, or dripping electronic adhesives, oils, or other liquids onto a product to facilitate bonding, encapsulation, insulation, or fixation. The applications of dispensing are extremely wide, ranging from large-scale production like airplanes and ships to small-scale manufacturing like clothing and toys. In short, wherever adhesive is needed, dispensing technology is required.

[0003] The amount of glue dispensed needs to be precisely controlled during the dispensing process. Therefore, the glue should be in a uniform state, and air bubbles should be prevented from mixing into the glue, which would make it impossible to accurately control the amount of glue dispensed.

[0004] Current technology typically monitors the dispensing head; if air bubbles are found, the product needs to be replaced and the dispensing process repeated. This method only detects dispensing defects and cannot detect air bubbles or impurities in the adhesive before defects occur, thus it's a reactive approach. How to promptly detect air bubbles or other impurities in the adhesive is a problem that needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a liquid detection device based on visual recognition, which aims to solve the problem of how to detect bubbles or other impurities in glue in a timely manner.

[0006] This invention is implemented as follows: a liquid detection device based on visual recognition, the liquid detection device based on visual recognition comprising:

[0007] A driving component, the driving component being used to drive the observation tube to rotate to obtain different detection orientations;

[0008] A fixing component is provided for fixing both ends of the observation tube. The fixing component includes an inlet fixing component and an outlet fixing component. The inlet fixing component is located on the inlet side of the observation tube and is used for installing and fixing the inlet tube. The outlet fixing component is located on the outlet side of the observation tube and is used for installing and fixing the outlet tube.

[0009] A visual inspection module is used to acquire images of the observation tube to identify whether there are air bubbles or impurities in the liquid in the observation tube.

[0010] The liquid detection device based on vision recognition provided by this invention can drive the observation tube to rotate by setting a driving component, thereby facilitating the vision detection component to acquire images of the observation tube from multiple angles. This makes it easier to detect whether there are air bubbles or impurities in the liquid flowing through the observation tube, thus detecting the quality of the incoming glue before dispensing. This can effectively prevent problems such as dispensing head blockage or dispensing volume fluctuation, and achieve precise dispensing. Attached Figure Description

[0011] Figure 1 The three-dimensional structure of the vision-based liquid detection device provided in the embodiments of the present invention Figure 1 ;

[0012] Figure 2 The three-dimensional structure of the vision-based liquid detection device provided in the embodiments of the present invention Figure 2 ;

[0013] Figure 3 A three-dimensional structural diagram of a liquid detection device based on visual recognition provided in another embodiment of the present invention;

[0014] Figure 4 for Figure 3 A partial view of the portion of the first observation tube located between the two mounting plates.

[0015] In the attached diagram: 1. Base plate; 2. Fourth gear; 3. Fourth fixed joint; 4. Seventh quick-connect joint; 5. Fourth rotary joint; 6. Eighth quick-connect joint; 7. Fourth quick-connect joint; 8. Second rotary joint; 9. Second locking block; 10. Third quick-connect joint; 11. First observation tube; 12. Second fixed joint; 13. Second gear; 14. Motor; 15. First mounting plate; 16. Second observation tube; 17. First quick-connect joint; 18. First locking block; 19. Second quick-connect joint; 20. First rotary joint; 21. Sixth quick-connect joint; 22. Third rotary joint; 23. Fifth quick-connect joint; 24. Camera; 25. Mounting base; 26. Drive gear; 27. First gear; 28. First fixed joint; 29. ​​Third fixed joint; 30. Third gear; 31. Light source; 32. Fixed tube; 33. Movable tube; 34. Second mounting plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0017] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0018] like Figure 1-4As shown in the diagram, this embodiment of the invention provides a structural diagram of a liquid detection device based on visual recognition, comprising:

[0019] A driving component, the driving component being used to drive the observation tube to rotate to obtain different detection orientations;

[0020] A fixing component is provided for fixing both ends of the observation tube. The fixing component includes an inlet fixing component and an outlet fixing component. The inlet fixing component is located on the inlet side of the observation tube and is used for installing and fixing the inlet tube. The outlet fixing component is located on the outlet side of the observation tube and is used for installing and fixing the outlet tube.

[0021] A visual inspection module is used to acquire images of the observation tube to identify whether there are air bubbles or impurities in the liquid in the observation tube.

[0022] In this embodiment, the adhesive passes through the vision-based liquid detection device provided by this invention before being supplied to the dispensing head. The liquid flows through the observation tube, and the vision detection module acquires and detects images of the observation tube to identify whether there are air bubbles or impurities in the liquid flowing through it. In this embodiment, the observation tube can be rotated by the drive component, which facilitates the vision detection module to detect the observation tube from different angles, making it easier to detect air bubbles or impurities.

[0023] In this embodiment, the fixing component is used to install and fix the two ends of the observation tube. In use, the outlet of the glue supply device is connected to the inlet end of the observation tube, and the outlet end of the observation tube is connected to the dispensing head.

[0024] In this embodiment, the method for observing whether there are bubbles or impurities in the observation tube by image recognition can refer to existing technology, where bubbles or impurities can be regarded as general target objects. For target object detection, identification can be performed by calculating the difference between pixels in the preceding and following images. If the difference between corresponding pixels in the preceding and following images is 0 or close to 0, it can be considered that the preceding and following pixels are consistent, and there are no bubbles or impurities in the observation tube. If, at a certain point in the observation tube, the difference between the pixel values ​​of corresponding pixels in the preceding and following images is not 0 or not close to 0, it can be determined that there is a change in the corresponding pixels, and bubbles or other impurities may be present. This is a conventional method for image recognition and detection, and this embodiment of the invention does not further limit this process.

[0025] The liquid detection device based on vision recognition provided by this invention can drive the observation tube to rotate by setting a driving component, thereby facilitating the vision detection component to acquire images of the observation tube from multiple angles. This makes it easier to detect whether there are air bubbles or impurities in the liquid flowing through the observation tube, thus detecting the quality of the incoming glue before dispensing. This can effectively prevent problems such as dispensing head blockage or dispensing volume fluctuation, and achieve precise dispensing.

[0026] As an optional embodiment of the present invention, the drive assembly includes a first mounting plate 15, a second mounting plate 34, a motor 14, and a first observation tube 11;

[0027] The first mounting plate 15 and the second mounting plate 34 are arranged side by side and facing each other on the base plate 1. The outer side of the first mounting plate 15 is provided with a drive gear 26 and a first gear 27 that meshes with the drive gear 26. The first mounting plate 15 is provided with a motor 14, and the drive gear 26 is sleeved on the output shaft of the motor 14.

[0028] A second gear 13 is provided on the outer side of the second mounting plate 34. The second gear 13 is coaxially arranged with the first gear 27. A first observation tube 11 is provided between the first gear 27 and the second gear 13. The first observation tube 11 is connected to the first gear 27 through the first fixed joint 28. The first observation tube 11 is connected to the second gear 13 through the second fixed joint 12.

[0029] The first observation tube 11 is a transparent tube.

[0030] In this embodiment, the base plate 1 serves as the mounting foundation for the entire device. Both the first mounting plate 15 and the second mounting plate 34 are mounted on the base plate 1. Both the first mounting plate 15 and the second mounting plate 34 are rectangular plates, arranged side-by-side facing each other. In this embodiment, the outer side of the first mounting plate 15 refers to the side of the first mounting plate 15 facing away from the second mounting plate 34; similarly, the outer side of the second mounting plate 34 refers to the side of the second mounting plate 34 facing away from the first mounting plate 15. In this embodiment, one end face of the driving gear 26, the first gear 27, and the second gear 13 is close to the outer side of the corresponding mounting plate. A hollow shaft is formed in the middle of the gear. An opening is provided on the mounting plate corresponding to the gear position, and a bearing is installed within the opening. The hollow shaft passes through the bearing and can rotate within the bearing. It is understood that, unless otherwise specified, the basic structure of all gears involved in this invention is the same as described above, and this invention will not repeat it further.

[0031] In this embodiment, the motor 14 drives the drive gear 26 to rotate, and the drive gear 26 drives the first gear 27 that meshes with it. A first observation tube 11 is provided between the first gear 27 and the second gear 13. The first observation tube 11 is fixed relative to the first gear 27 and the second gear 13, and can transmit rotational motion between the first gear 27 and the second gear 13.

[0032] In this embodiment, the first observation tube 11 is made of a transparent tube, which facilitates the acquisition of images of the liquid inside the tube, thereby making it easier to identify bubbles or impurities in the liquid.

[0033] As an optional embodiment of the present invention, the distance between the first mounting plate 15 and the second mounting plate 34 is adjustable;

[0034] The first observation tube 11 is made of a flexible tube. The portion of the first observation tube 11 located between the first mounting plate 15 and the second mounting plate 34 is raised to form an arc shape. The size of the arc shape can be adjusted by adjusting the distance between the first mounting plate 15 and the second mounting plate 34.

[0035] Fixed tubes 32 are provided on the faces of the first gear 27 and the second gear 13. The fixed tubes 32 have through grooves that allow the first observation tube 11 to bulge. Movable tubes 33 are sleeved on the opposite ends of the two fixed tubes 32. The two ends of the movable tubes 33 are respectively sleeved on one of the fixed tubes 32. The two fixed tubes 32 transmit rotational motion through the movable tubes 33.

[0036] In this embodiment, the first observation tube 11 is a flexible tube. The degree of bulge in the middle of the flexible tube is adjusted by changing the distance between the first mounting plate 15 and the second mounting plate 34, thereby giving the middle of the flexible tube different rotation radii. When the motor 14 drives the observation tube to rotate through the gear, the middle of the first observation tube 11 is subjected to centrifugal force, and air bubbles or impurities tend to accumulate at the bulge position of the flexible tube. During the working interval of the dispensing machine (when dispensing is stopped), the first observation tube 11 stops rotating and stops at a selected position (e.g., the highest point, which is effective for low-density impurities; or the lowest point, which is effective for high-density impurities). Through image acquisition and analysis, impurities or air bubbles in the liquid can be more easily identified.

[0037] In this embodiment, since the first observation tube 11 is a flexible tube, the transmission between the first gear 27 and the second gear 13 is achieved by setting a fixed tube 32 and a movable tube 33. In this embodiment, the two fixed tubes 32 are respectively connected to the end faces of the hollow shafts of the first gear 27 and the second gear 13. The two ends of the movable tube 33 are respectively attached to different fixed tubes 32. The movable tube 33 and the fixed tube 32 cannot be rotated relative to each other. Therefore, when the fixed tube 32 on one side of the first gear 27 rotates with the first gear 27, the second gear 13 can be driven to rotate through the movable tube 33, thereby realizing the transmission of rotational motion.

[0038] As an optional embodiment of the present invention, a sliding groove is provided on the base plate 1, and the first mounting plate 15 and the second mounting plate 34 are disposed in the sliding groove. The first mounting plate 15 and the second mounting plate 34 can slide along the sliding groove to be relatively close or relatively far apart, and the first sliding plate and / or the second sliding plate can be fixed at any position in the sliding groove.

[0039] In this embodiment, the chute can be a T-shaped, concave, or convex cross-section, which are conventional shapes for existing chute types. This design facilitates the sliding of the mounting plates relative to the chute, thereby adjusting the relative position between the two mounting plates. This, in turn, adjusts the degree of bulging of the observation tube located between the two mounting plates, and adjusts the maximum rotation radius of the observation tube. Consequently, the apex of the bulge in the observation tube experiences different centrifugal forces at the same rotational speed, making it easier for impurities to accumulate and facilitating visual inspection.

[0040] As an optional embodiment of the present invention, the fixing component includes a fixing plate and a first locking block 18 and a second locking block 9 respectively disposed at both ends of the fixing plate;

[0041] The first locking block 18 is located on the side of the first mounting plate 15 where the gear is provided. The first locking block 18 is provided with a first rotary joint 20. The side of the first rotary joint 20 facing the first mounting plate 15 is provided with a first quick-tightening joint 17. One end of the first observation tube 11 is connected to the first quick-tightening joint 17. The side of the first rotary joint 20 facing away from the first mounting plate 15 is provided with a second quick-tightening joint 19.

[0042] The second locking block 9 is located on the side of the second mounting plate 34 where the gear is provided. The second locking block 9 is provided with a second rotary joint 8. The side of the second rotary joint 8 facing the second mounting plate 34 is provided with a third quick-connect joint 10. The other end of the first observation tube 11 is connected to the third quick-connect joint 10. The side of the second rotary joint 8 facing away from the second mounting plate 34 is provided with a fourth quick-connect joint 7.

[0043] In this embodiment, the rotary joint and the locking block are locked together. Each rotary joint is connected to a quick-connect fitting at both ends, which connects to a conduit or the first observation tube 11. The other end of the conduit is connected to a feeding device to provide adhesive.

[0044] As an optional embodiment of the present invention, the fixing plate is provided with a plurality of mounting holes, and the distance between the first locking block 18 and the second locking block 9 can be adjusted by connecting them to different mounting holes.

[0045] In this embodiment, when the length of the first observation tube 11 is constant, the length of the portion of the first observation tube 11 between the two mounting plates can be changed by altering the distance between the two locking blocks. This allows the observation tube to bulge out in an arc shape between the two mounting plates, without necessarily needing to adjust the spacing between the two mounting plates. Of course, during this process, the fixing connector needs to release the first observation tube 11 first, and after adjustment, the fixing connector is used to lock the first observation tube 11. It can be understood that when the motor 14 drives the drive gear 26 to rotate, the entire first observation tube 11 rotates, including the portion of the first observation tube 11 located between the mounting plate and the locking blocks (the portion between the first mounting plate 15 and the first locking block 18, and the portion between the second mounting plate 34 and the second locking block 9).

[0046] As an optional embodiment of the present invention, the driving component further includes a second observation tube 16;

[0047] A third gear 30 that meshes with the first gear 27 is provided on the outer side of the first mounting plate 15;

[0048] The outer side of the second mounting plate 34 is provided with a fourth gear 2 that meshes with the second gear 13. The fourth gear 2 is coaxially arranged with the third gear 30. A second observation tube 16 is provided between the third gear 30 and the fourth gear 2. The second observation tube 16 is connected to the third gear 30 through a third fixed joint 29. The second observation tube 16 is connected to the fourth gear 2 through a fourth fixed joint 3.

[0049] The second observation tube 16 is a transparent tube.

[0050] In this embodiment, unlike the previous embodiment, a second observation tube 16 is further included, which is arranged side-by-side with the first observation tube 11. In this embodiment, by providing the second observation tube 16, different components of the composite adhesive can be detected separately in scenarios requiring composite dispensing.

[0051] As an optional embodiment of the present invention, the first card block 18 is further provided with a third rotary joint 22, a fifth quick-connect joint 23 is provided on the side of the third rotary joint 22 facing the first mounting plate 15, one end of the second observation tube 16 is connected to the fifth quick-connect joint 23, and a sixth quick-connect joint 21 is provided on the side of the third rotary joint 22 facing away from the first mounting plate 15.

[0052] The second locking block 9 is also provided with a fourth rotary joint 5. A seventh quick-connect joint 4 is provided on the side of the fourth rotary joint 5 facing the second mounting plate 34. The other end of the second observation tube 16 is connected to the seventh quick-connect joint 4. An eighth quick-connect joint 6 is provided on the side of the fourth rotary joint 5 facing away from the second mounting plate 34.

[0053] In this embodiment, the connection method of the second observation tube 16 is defined, which can be referred to the relevant content of the first observation tube 11. In this embodiment, optionally, the definition of the first observation tube 11 can be fully applied to the second observation tube 16, including but not limited to using a flexible tube, adjustable degree of central bulge, etc., which are specific implementation methods, and this embodiment of the present invention will not describe them in detail.

[0054] As an optional embodiment of the present invention, the visual detection module includes a camera 24;

[0055] The camera 24 is connected to the base plate 1 via a mounting bracket 25. The positions of the mounting bracket 25 and the base plate 1 are adjustable so that the camera 24 can be moved closer to or further away from the observation tube.

[0056] In this embodiment, the lens of the camera 24 is configured to have a variable focal length, so that when the first observation tube 11 or the second observation tube 16 is rotated to different positions, a clearer image can be obtained by adjusting the focal length of the lens.

[0057] As an optional embodiment of the present invention, the liquid detection device based on visual recognition further includes a light source 31, which is disposed on the base plate 1, located behind the observation tube, and facing the direction of image acquisition by the visual detection module.

[0058] In this embodiment, the light source 31 can be set as a plate-shaped light source 31, thereby obtaining a larger illumination surface. Within the entire illumination surface, regardless of where the first observation tube 11 or the second observation tube 16 is located, a good lighting effect can be obtained, thus facilitating the identification of bubbles or impurities in the observation tube.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A liquid detection device based on visual recognition, characterized in that, The vision-based liquid detection device includes: A driving component, the driving component being used to drive the observation tube to rotate to obtain different detection orientations; A fixing assembly, used to fix both ends of the observation tube, includes an inlet fixing assembly and an outlet fixing assembly. The inlet fixing assembly is disposed on the inlet side of the observation tube for installation and fixing at the inlet side, and the outlet fixing assembly is disposed on the outlet side of the observation tube for installation and fixing at the outlet side. A visual inspection module is used to acquire images of the observation tube to identify whether there are air bubbles or impurities in the liquid in the observation tube. The drive assembly includes a first mounting plate, a second mounting plate, a motor, and a first observation tube; The first mounting plate and the second mounting plate are arranged side by side and facing each other on the base plate. The outer side of the first mounting plate is provided with a drive gear and a first gear meshing with the drive gear. The first mounting plate is provided with a motor, and the drive gear is sleeved on the drive shaft of the motor. A second gear is provided on the outer side of the second mounting plate. The second gear is coaxial with the first gear. A first observation tube is provided between the first gear and the second gear. The first observation tube is connected to the first gear through a first fixed joint, and the first observation tube is connected to the second gear through a second fixed joint. The first observation tube is a transparent tube; The fixing component includes a fixing plate and a first locking block and a second locking block respectively disposed at both ends of the fixing plate; The first locking block is located on the side of the first mounting plate where the gear is provided. The first locking block is provided with a first rotary joint. The side of the first rotary joint facing the first mounting plate is provided with a first quick-tightening joint. One end of the first observation tube is connected to the first quick-tightening joint. The side of the first rotary joint facing away from the first mounting plate is provided with a second quick-tightening joint. The second locking block is located on the side of the second mounting plate where the gear is provided. The second locking block is provided with a second rotary joint. The side of the second rotary joint facing the second mounting plate is provided with a third quick-connect joint. The other end of the first observation tube is connected to the third quick-connect joint. The side of the second rotary joint facing away from the second mounting plate is provided with a fourth quick-connect joint. The drive assembly also includes a second observation tube; A third gear that meshes with the first gear is provided on the outer side of the first mounting plate; A fourth gear that meshes with the second gear is provided on the outer side of the second mounting plate. The fourth gear is coaxial with the third gear. A second observation tube is provided between the third gear and the fourth gear. The second observation tube is connected to the third gear through a third fixed joint, and the second observation tube is connected to the fourth gear through a fourth fixed joint. The second observation tube is a transparent tube.

2. The liquid detection device based on vision recognition according to claim 1, characterized in that, The distance between the first mounting plate and the second mounting plate is adjustable; The first observation tube is made of a flexible tube. The portion of the first observation tube located between the first mounting plate and the second mounting plate is raised to form an arc shape. The size of the arc shape can be adjusted by adjusting the distance between the first mounting plate and the second mounting plate. Fixed tubes are provided on the faces of the first gear and the second gear. The fixed tubes have through grooves that allow the first observation tube to bulge. Movable tubes are sleeved on the opposite ends of the two fixed tubes. The two ends of the movable tubes are respectively sleeved on a fixed tube. The two fixed tubes transmit rotational motion through the movable tubes.

3. The liquid detection device based on visual recognition according to claim 2, characterized in that, The base plate is provided with a sliding groove, and the first mounting plate and the second mounting plate are disposed in the sliding groove. The first mounting plate and the second mounting plate can slide along the sliding groove to be relatively close or relatively far apart. The first sliding plate and / or the second sliding plate can be fixed at any position in the sliding groove.

4. The liquid detection device based on visual recognition according to claim 1, characterized in that, The fixing plate is provided with a number of mounting holes. The distance between the first and second locking blocks can be adjusted by connecting them to different mounting holes.

5. The liquid detection device based on vision recognition according to claim 1, characterized in that, The first card block is also provided with a third rotary joint, and a fifth quick-connect joint is provided on the side of the third rotary joint facing the first mounting plate. One end of the second observation tube is connected to the fifth quick-connect joint, and a sixth quick-connect joint is provided on the side of the third rotary joint facing away from the first mounting plate. The second card block is also provided with a fourth rotary joint, and a seventh quick-connect joint is provided on the side of the fourth rotary joint facing the second mounting plate. The other end of the second observation tube is connected to the seventh quick-connect joint, and an eighth quick-connect joint is provided on the side of the fourth rotary joint facing away from the second mounting plate.

6. The liquid detection device based on vision recognition according to claim 1, characterized in that, The visual inspection module includes a camera; The camera is connected to the base plate via a mounting bracket, and the position of the mounting bracket and the base plate can be adjusted to move the camera closer to or further away from the observation tube.

7. The liquid detection device based on vision recognition according to any one of claims 1-6, characterized in that, The vision-based liquid detection device also includes a light source, which is set on the base plate, located behind the observation tube, and facing the direction of image acquisition by the vision detection module.

Images