Paper bag defect detection equipment based on machine vision and waste discharge method

Abstract

The invention relates to the technical field of paper bag production and detection, and discloses paper bag defect detection equipment based on machine vision and a waste discharge method.The paper bag defect detection equipment comprises a rack, the rack is provided with a first conveying belt and a second conveying belt, and the first conveying belt and the second conveying belt are used for clamping and conveying paper bags; the separating assembly is arranged to actively assist paper bags to be separated from the first conveying belt and the second conveying belt, the tight attaching state formed by extrusion in the clamping process is broken, the paper bags are restored to the loose state where the paper bags are easily conveyed independently on the first conveying belt, and then the paper bags are separated from the first conveying belt and the second conveying belt. The paper bag is separated from the discharging end of the second conveying belt, is independently conveyed by the first conveying belt again and gradually approaches the separation area, so that the problem that the paper bag is tightly attached to the flexible belt due to extrusion during clamping and conveying can be effectively solved, and the stability and reliability of the whole detection waste discharge process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of paper bag production inspection, and in particular to a paper bag defect detection device and a waste discharge method based on machine vision. Background Art

[0002] During the quality control phase of paper bag production, the machine vision defect detection system needs to inspect all surface defects of paper bags, including handles, side glue, bottom glue, and bottom molding. After the inspection is completed, the paper bags need to be stably conveyed to the separation stage. In this case, the double-belt clamping conveying method becomes the preferred method: two synchronously moving upper and lower belts form a full-area clamp on the paper bags, which can not only prevent the paper bags from being deformed due to their own gravity or conveying inertia after inspection, but also accurately control their conveying trajectory, providing a stable material posture foundation for subsequent paper bag separation. However, in actual production, the continuous clamping of the paper bag by the double belts will make the two fit tightly together. The greater the clamping force, the more complete the contact between the paper bag and the belt surface, and the separation resistance will also increase accordingly: on the one hand, it is difficult for air to enter the gap between the paper bag and the belt in the clamping state, and it is easy to form a micro-vacuum adsorption; on the other hand, the close contact between the belt and the paper bag will intensify the electrostatic effect caused by friction, and further enhance the adhesion. When the paper bag needs to be disengaged from the clamping and enter the material receiving line or the waste discharge line, the clamping force of the belt will be converted into a viscous force that hinders separation, which not only makes separation difficult, but also easily causes pulling due to forced separation, causing the edge of the paper bag to tear or the shape to be damaged, which in turn causes waste discharge errors or qualified products to be mixed with defective products, affecting production efficiency and quality control accuracy. Based on this, the present invention purposely provides a paper bag defect detection device and waste discharge method based on machine vision that can avoid the difficulty of paper bag separation caused by belt clamping and improve waste discharge efficiency and quality control accuracy. Summary of the Invention

[0003] The purpose of the present invention is to address the shortcomings of the existing technology and provide a paper bag defect detection device and waste discharge method based on machine vision to solve the technical problems in the existing technology.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A paper bag defect detection device based on machine vision, comprising: A frame, wherein a first conveyor belt and a second conveyor belt are provided on the frame, and the first conveyor belt and the second conveyor belt are used to clamp and convey paper bags, and a visual detection component is provided on the frame, and the visual detection component is used to detect paper bags at the feeding end of the first conveyor belt, and the first conveyor belt and the second conveyor belt discharging end are staggered, and the discharging end of the second conveyor belt faces the discharging end of the first conveyor belt, and a first receiving belt and a second receiving belt are provided on the frame, and the first receiving belt and the second receiving belt are used to receive paper bags, and the feeding ends of the first receiving belt and the second receiving belt form a receiving port, the discharging end of the first conveyor belt faces the receiving port, and there is a separation area between the discharging end of the first conveyor belt and the receiving port; A waste discharge chamber is provided in the frame, the waste discharge chamber is open, and the waste discharge chamber is located below the separation zone. A waste discharge conveyor belt is provided in the waste discharge chamber, and an output end of the waste discharge conveyor belt is located outside the frame; A fixing frame, the fixing frame is fixedly mounted on the frame, and a plurality of high-pressure jet assemblies arranged at equal intervals are fixedly mounted on the fixing frame, the air outlet of the high-pressure jet assembly is directed toward the separation area, and the high-pressure jet assembly is connected to the visual inspection assembly. When the visual inspection assembly detects that the paper bag is unqualified, the high-pressure jet assembly is turned on to blow the unqualified paper bag passing through the separation area into the waste discharge chamber; A separation component is provided at the discharge ends of the second conveyor belt and the first conveyor belt, and is used to separate the paper bags from the first conveyor belt and the second conveyor belt.

[0005] As a further solution of the present invention: the number of the second conveyor belts is three, and the three second conveyor belts are arranged at equal intervals, and there is a gap between two adjacent second conveyor belts. An extension plate is fixedly installed on the fixed frame, and a first photoelectric sensor is fixedly installed on the extension plate. The first photoelectric sensor is connected to the high-pressure jet assembly. The detection end of the first photoelectric sensor is located in the gap between the two second conveyor belts, and the first photoelectric sensor is located at the discharge end of the second conveyor belt. The first photoelectric sensor is used to detect paper bags.

[0006] As a further solution of the present invention: the number of the second receiving belts is three, and the three second receiving belts are arranged at equal intervals, and there is a gap between two adjacent second receiving belts. A fixed plate is fixedly installed on the frame, and a second photoelectric sensor is fixedly installed on the fixed plate. The second photoelectric sensor is connected to the visual detection component. The detection end of the fixed plate is located in the gap between the two second feeding belts, and the fixed plate is located at the feeding end of the first receiving belt and the second receiving belt. The fixed plate is used to detect paper bags.

[0007] As a further solution of the present invention: the separation component includes a first static elimination rod, a shovel plate and a second static elimination rod, and the first static elimination rod, the shovel plate and the second static elimination rod are all fixedly installed in the frame. When the paper bag moves from the discharge end of the second conveyor belt to the discharge end of the first conveyor belt, the paper bag passes through the first static elimination rod, the shovel plate and the second static elimination rod in sequence. The first static elimination rod is located above the first conveyor belt, and the feed end of the shovel plate abuts against the surface of the first conveyor belt. The second static elimination rod is located at the discharge end of the shovel plate, and the horizontal height of the second static elimination rod is lower than the horizontal height of the discharge end of the shovel plate.

[0008] As a further solution of the present invention: a chamfer is provided on the discharge end of the shovel plate.

[0009] As a further solution of the present invention: the separation component also includes a rotating plate, a baffle and a rotating rod, the rotating plate is rotatably installed on the inner wall of the frame, the rotating plate is driven to rotate by a driving source, three baffles are rotatably installed on the rotating plate at equal intervals, the rotating rod is fixedly installed on the baffle, and the baffle and the rotating rod are both located in the separation area, the driving source is connected to the visual detection component, when the visual detection component detects that the paper bag is qualified, the driving source drives the separation area to rotate to a horizontal state, so that the three baffles connect the discharge end of the first conveyor belt with the receiving port, when the visual detection component detects that the paper bag is unqualified, the driving source drives the separation area to rotate to an inclined state, so that the discharge end of the first conveyor belt faces the rotating rod, and at this time the air outlet of the high-pressure jet component faces the gap between the discharge end of the first conveyor belt and the rotating rod.

[0010] As a further solution of the present invention: a third static elimination bar is fixedly installed on the frame, and the third static elimination bar is located in the second conveyor belt. When the second conveyor belt conveys paper bags, the paper bags pass through the third static elimination bar and the first photoelectric sensor in sequence.

[0011] A method for discharging waste from a machine vision-based paper bag defect detection device, the method being applied to the machine vision-based paper bag defect detection device as described above, the method comprising the following steps: Step S1: Place the paper bag to be inspected on the first conveyor belt. The visual inspection component starts to inspect the paper bag, and the inspection result is qualified or unqualified. Step S2: The paper bag is then conveyed from the first conveyor belt alone to the first conveyor belt and the second conveyor belt, thereby conveying the paper bag to the separation area; Step S3: The first conveyor belt and the second conveyor belt convey the paper bag to the separation assembly, and the separation assembly assists the paper bag to be separated from the first conveyor belt and the second conveyor belt. At this time, the paper bag is once again conveyed solely by the first conveyor belt; Step S4: When the paper bag is qualified after inspection, the high-pressure jet assembly is not started. At this time, the first conveyor conveys the paper bag to the receiving port, and then the first receiving belt and the second receiving belt jointly convey the paper bag; Step S5: When the inspection result of the paper bag is unqualified, the high-pressure jet assembly is started, and the high-pressure gas ejected by the high-pressure jet assembly blows the paper bag through the separation area into the waste discharge chamber, and then the waste discharge conveyor belt discharges the paper bag out of the rack.

[0012] Beneficial effects of the present invention: 1. In the present invention, as the first and second conveyor belts are conveyed synchronously, when the paper bag reaches the separation assembly, the separation assembly actively assists the paper bag in separating from the first and second conveyor belts, breaking the tight fit formed by squeezing during the clamping process, so that the paper bag is restored to a relaxed state on the first conveyor belt that is easy to convey alone. Subsequently, the paper bag is separated from the discharge end of the second conveyor belt and conveyed alone by the first conveyor belt again, gradually approaching the separation area. This can effectively solve the problem of the paper bag being tightly fitted to the flexible belt due to squeezing during the clamping and conveying of the first and second conveyor belts, thereby avoiding classification errors caused by poor separation in the separation area and the problem of paper bag tearing caused by pulling, thereby improving the stability and reliability of the entire detection and waste discharge process; 2. In the present invention, a first static elimination bar is provided at the discharge end of the second conveyor belt. Once the paper bag is discharged from the second conveyor belt, the static electricity adsorbed on the paper bag will be immediately adsorbed by the first static elimination bar, thereby preventing the paper bag from being adsorbed by the second conveyor belt and pulling the paper bag body. The paper bag after the static electricity is removed will pass through the shovel plate as it is transported by the first conveyor belt. The shovel plate will scoop up the paper bag, thereby preventing the paper bag and the first conveyor belt from being tightly attached, resulting in difficulty in separation in the separation area. When the paper bag scooped up by the shovel plate falls back onto the first conveyor belt, the bottom of the paper bag will pass through the second static elimination bar, and the static electricity of the paper bag will be secondary removed by the second static elimination bar, thereby ensuring that the paper bag is completely separated from the first and second conveyor belts, and ensuring that the paper bag can be sorted smoothly in the separation area. 3. In the present invention, by arranging baffles and rotating rods at the separation zone, when the visual inspection component detects that the paper bag is qualified, the driving source drives the separation zone to rotate to a horizontal state, so that the three baffles connect the discharge end of the first conveyor belt with the receiving port, which is equivalent to allowing the baffles to fill the separation zone, ensuring that the paper bag can smoothly enter the receiving port through the baffles; and when the visual inspection component detects that the paper bag is unqualified, the driving source drives the separation zone to rotate to an inclined state, so that the discharge end of the first conveyor belt faces the rotating rod, and at this time the air outlet of the high-pressure jet component faces the gap between the discharge end of the first conveyor belt and the rotating rod, so that the rotating rod is used to directly block the paper bag from entering the receiving port, and then cooperates with the high-pressure airflow ejected downward by the high-pressure jet component to ensure that the unqualified paper bags eventually fall into the waste discharge cavity, thereby further improving the accuracy of paper bag classification. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic structural diagram of a cross-section of the frame in the present invention; Figure 3 In the present invention Figure 2 A schematic diagram of the structure at a glance; Figure 4 In the present invention Figure 3 A schematic diagram of the enlarged structure of part A; Figure 5 This is a schematic diagram of the tilted state of the rotating plate in the present invention; Figure 6 It is a structural schematic diagram of the rotating plate in the present invention.

[0015] In the figure: 1. Frame; 2. First conveyor belt; 3. Visual inspection component; 4. Second conveyor belt; 5. First receiving belt; 6. Second receiving belt; 7. Separation area; 8. Waste discharge chamber; 9. Waste discharge conveyor belt; 10. Fixed frame; 11. Extension plate; 12. First photoelectric sensor; 13. High-pressure jet assembly; 14. First static elimination rod; 15. Shovel plate; 16. Second static elimination rod; 17. Chamfer; 18. Rotating plate; 19. Baffle; 20. Rotating rod; 21. Third static elimination rod; 22. Second photoelectric sensor; 23. Fixed plate; 24. Receiving port. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0017] See also Figures 1-6 As shown, the present invention is a paper bag defect detection device based on machine vision, comprising: A frame 1 is provided with a first conveyor belt 2 and a second conveyor belt 4, which are used to clamp and convey paper bags. A visual detection component 3 is provided on the frame 1, which is used to detect paper bags at the feeding end of the first conveyor belt 2. The discharging ends of the first conveyor belt 2 and the second conveyor belt 4 are staggered, and the discharging end of the second conveyor belt 4 faces the discharging end of the first conveyor belt 2. A first receiving belt 5 and a second receiving belt 6 are provided on the frame 1. The first receiving belt 5 and the second receiving belt 6 are used to receive paper bags. The feeding ends of the first receiving belt 5 and the second receiving belt 6 form a receiving port 24, the discharging end of the first conveyor belt 2 faces the receiving port 24, and there is a separation area 7 between the discharging end of the first conveyor belt 2 and the receiving port 24; A waste discharge chamber 8 is provided in the frame 1. The waste discharge chamber 8 is open and located below the separation zone 7. A waste discharge conveyor belt 9 is provided in the waste discharge chamber 8. The output end of the waste discharge conveyor belt 9 is located outside the frame 1. A fixing frame 10 is fixedly mounted on the frame 1. A plurality of equally spaced high-pressure jet assemblies 13 are fixedly mounted on the fixing frame 10. The air outlet of the high-pressure jet assembly 13 faces the separation zone 7. The high-pressure jet assembly 13 is connected to the visual inspection assembly 3. When the visual inspection assembly 3 detects that a paper bag is unqualified, the high-pressure jet assembly 13 is turned on to blow the unqualified paper bag passing through the separation zone 7 into the waste discharge chamber 8. A separation component is provided at the discharge ends of the second conveyor belt 4 and the first conveyor belt 2 , and is used to separate the paper bags from the first conveyor belt 2 and the second conveyor belt 4 .

[0018] In one case of this embodiment, it should be noted that the first conveyor belt 2, the second conveyor belt 4, the first receiving belt 5, the second receiving belt 6 and the waste discharge conveyor belt 9 of the present invention all include multiple transmission wheels, a drive wheel and multiple tensioning wheels, the high-pressure jet assembly 13 includes components such as a high-pressure nozzle, a high-pressure gas delivery pipe, a gas tank pipe and a solenoid valve, and the visual detection assembly 3 includes an industrial camera, a fill light source, an image recognition module, etc. The above components are all existing technologies, and the present invention does not improve them. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, which does not affect the integrity of the present invention.

[0019] The working principle of the present invention is as follows: first, the paper bag to be inspected is placed on the first conveyor belt 2, at which time the visual inspection component 3 starts to inspect the paper bag, and the inspection result is qualified or unqualified. Then, the paper bag is changed from being transported alone by the first conveyor belt 2 to being clamped and transported by the first conveyor belt 2 and the second conveyor belt 4. The purpose is to form a full-area clamping for the paper bag, which can prevent the paper bag from being deformed due to its own gravity or conveying inertia after the inspection. As the first conveyor belt 2 and the second conveyor belt 4 are transported, when the paper bag passes the separation component, the separation component assists the paper bag in being transported between the first conveyor belt 2 and the second conveyor belt 4. The paper bag is separated from the second conveyor belt 4, allowing the paper bag to recover on the first conveyor belt 2 to a state where the first conveyor belt 2 can easily transport the paper bag. Then the paper bag leaves the discharge end of the second conveyor belt 4 and is transported by the first conveyor belt 2 alone. At this time, the paper bag is about to reach the separation area 7. According to the inspection result of the visual inspection component 3 on the paper bag, when the paper bag is a qualified product, the high-pressure jet component 13 is closed. Since the paper bag itself has a certain toughness and the width of the separation area 7 is small, the paper bag can pass through the separation area when only the first conveyor belt 2 is transporting it. The paper bag leaves the separation zone 7 and enters the receiving port 24. The first receiving belt 5 and the second receiving belt 6 then convey the paper bag together. This completes the collection of qualified paper bag products. When the paper bag is an unqualified product, the high-pressure jet component 13 is started. The high-pressure gas touched by the high-pressure jet component 13 will organize the paper bag to cross the separation zone 7. The high-pressure gas will blow the separation zone 7 downward to the waste discharge cavity 8. At this time, the first feeding belt 2 will convey the unqualified paper bag to the waste discharge cavity 8, and the unqualified paper bag that falls into the waste discharge cavity 8 will fall onto the waste discharge conveyor belt 9, which will take the unqualified paper bag to the waste discharge conveyor belt 9. The paper bags are discharged from the rack 1 to avoid the accumulation of unqualified paper bags in the rack 1 and to complete the waste discharge operation in time. In this way, before the paper bags pass through the separation area 7 for classification, a separation component is provided to actively separate the paper bags from the first conveyor belt 2 and the second conveyor belt 4, so as to avoid the problem that the paper bags are squeezed during the clamping and transportation by the first conveyor belt 2 and the second conveyor belt 4, which causes the paper bags to be easily tightly attached to the flexible belts of the first conveyor belt 2 and the second conveyor belt 4 and make separation difficult, thereby avoiding the problem that the paper bags are misclassified in the separation area 7 and the paper bag body is easily pulled and torn.

[0020] like Figure 1-Figure 4 As shown, as a preferred embodiment of the present invention, the number of the second conveyor belts 4 is three, and the three second conveyor belts 4 are arranged at equal intervals, and there is a gap between two adjacent second conveyor belts 4. An extension plate 11 is fixedly mounted on the fixing frame 10, and a first photoelectric sensor 12 is fixedly mounted on the extension plate 11. The first photoelectric sensor 12 is connected to the high-pressure jet assembly 13. The detection end of the first photoelectric sensor 12 is located in the gap between the two second conveyor belts 4, and the first photoelectric sensor 12 is located at the discharge end of the second conveyor belt 4. The first photoelectric sensor 12 is used to detect paper bags.

[0021] Specifically, the number of the second receiving belts 6 is three, and the three second receiving belts 6 are arranged at equal intervals. There is a gap between two adjacent second receiving belts 6. A fixing plate 23 is fixedly installed on the frame 1, and a second photoelectric sensor 22 is fixedly installed on the fixing plate 23. The second photoelectric sensor 22 is connected to the visual detection component 3. The detection end of the fixing plate 23 is located in the gap between the two second feeding belts 4, and the fixing plate 23 is located at the feeding end of the first receiving belt 5 and the second receiving belt 6. The fixing plate 23 is used to detect paper bags.

[0022] In one case of this embodiment, it should be noted that the first photoelectric sensor 12 and the fixing plate 23 described in the present invention are both existing technologies, and the present invention does not improve them. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, which does not affect the integrity of the present invention.

[0023] In actual application, this embodiment sets three second conveyor belts 4 arranged at equal intervals in order to leave a gap between two adjacent second conveyor belts 4, and a first photoelectric sensor 12 is set in the gap to detect whether the paper bag is in place. The process of conveying the paper bag is that it is first clamped and conveyed by the first conveyor belt 2 and the second conveyor belt 4, and then the first conveyor belt 2 alone conveys the paper bag to the separation area 7 for classification. Therefore, before the paper bag enters the separation area 7 for classification, it must first pass through the second conveyor belt 4. In this way, the first photoelectric sensor 12 detects in advance whether the paper bag is in place, and the high-pressure jet component 13 can be immediately controlled to perform the corresponding operation without using the visual detection component 3 to control whether the high-pressure jet component 13 is opened or closed. This means that the detection result of the visual detection component 3 can be handed over to the first photoelectric sensor 12 for execution, and the visual detection component 3 can perform the detection work of the next paper bag, thereby improving the efficiency of paper bag detection, classification and waste discharge. The addition of the fixed plate 23 is to ensure that qualified paper bag products enter the first receiving belt 5 and the second receiving belt 6 for transportation. Similarly, it can also be used to ensure that no unqualified paper bag products enter the first receiving belt 5 and the second receiving belt 6. Because if the visual inspection component 3 detects that a paper bag is qualified, then the fixed plate 23 should detect a paper bag passing through. When the visual inspection component 3 detects that the result is unqualified, then the fixed plate 23 should not detect a paper bag passing through. The distance and speed of the paper bag from the visual inspection component 3 to the fixed plate 23 are known in advance. As long as a specified time range is preset in advance, if the fixed plate 23 detects an abnormal number of paper bag products passing through within this time range, it means that the system has an operational failure. Therefore, the addition of the fixed plate 23 and the secondary calibration of the classification of paper bags can also serve as an early warning.

[0024] like Figure 1-Figure 5As shown, as a preferred embodiment of the present invention, the separation component includes a first static elimination rod 14, a shovel plate 15 and a second static elimination rod 16. The first static elimination rod 14, the shovel plate 15 and the second static elimination rod 16 are all fixedly installed in the frame 1. When the paper bag moves from the discharge end of the second conveyor belt 4 to the discharge end of the first conveyor belt 2, the paper bag passes through the first static elimination rod 14, the shovel plate 15 and the second static elimination rod 16 in sequence. The first static elimination rod 14 is located above the first conveyor belt 2, and the feed end of the shovel plate 15 abuts against the surface of the first conveyor belt 2. The second static elimination rod 16 is located at the discharge end of the shovel plate 15, and the horizontal height of the second static elimination rod 16 is lower than the horizontal height of the discharge end of the shovel plate 15.

[0025] Specifically, a chamfer 17 is provided on the discharge end of the shovel plate 15 .

[0026] In actual application of this embodiment, considering that static electricity is generated during the transportation of the paper bag by the first conveyor belt 2 and the second conveyor belt 4, the paper bag is easily adsorbed on the first conveyor belt 2 and the second conveyor belt 4, a first static elimination bar 14 is provided at the discharge end of the second conveyor belt 4. Once the paper bag is discharged from the second conveyor belt 4, the static electricity adsorbed on it will be immediately adsorbed by the first static elimination bar 14, thereby preventing the paper bag from being adsorbed by the second conveyor belt 4 and pulling the paper bag body. After the static electricity is eliminated, the paper bag will pass through the shovel plate 15 as it is transported by the first conveyor belt 2, and the shovel plate 15 will remove the paper bag. The bag is scooped up to avoid the problem that the paper bag and the first conveyor belt 2 are tightly attached, resulting in difficulty in separation in the separation area 7. When the paper bag scooped up by the shovel plate 15 falls back onto the first conveyor belt 2, the bottom of the paper bag will pass through the second static elimination bar 16, and the second static elimination bar 16 will perform a second static elimination on the paper bag. On the one hand, it avoids static electricity generated by the friction between the paper bag and the shovel plate 15, and on the other hand, it avoids the problem that the first static elimination bar 14 does not completely eliminate static electricity. In this way, the paper bag is completely separated from the first conveyor belt 2 and the second conveyor belt 4, and the paper bag is smoothly sorted in the separation area 7. The discharging end of the shovel plate 15 is provided with a chamfer 17 to prevent the sharp edge of the shovel plate 15 from scratching the surface of the paper bag.

[0027] like Figures 1-6As shown, as a preferred embodiment of the present invention, the separation component also includes a rotating plate 18, a baffle 19 and a rotating rod 20. The rotating plate 18 is rotatably installed on the inner wall of the frame 1, and the rotating plate 18 is driven by a driving source to rotate. The three baffles 19 are rotatably installed on the rotating plate 18 at equal intervals. The rotating rod 20 is fixedly installed on the baffle 19, and the baffle 19 and the rotating rod 20 are both located in the separation area 7. The driving source is connected to the visual inspection component 3. When the visual inspection component 3 detects that the paper bag is qualified, the driving source drives the separation area 7 to rotate to a horizontal state, so that the three baffles 19 connect the discharge end of the first conveyor belt 2 with the receiving port 24. When the visual inspection component 3 detects that the paper bag is unqualified, the driving source drives the separation area 7 to rotate to an inclined state, so that the discharge end of the first conveyor belt 2 faces the rotating rod 20, and at this time the air outlet of the high-pressure jet component 13 faces the gap between the discharge end of the first conveyor belt 2 and the rotating rod 20.

[0028] In one case of this embodiment, the driving source may be a servo motor, a servo motor or other components, or other mechanisms capable of achieving rotational motion, which is not specifically limited in this embodiment.

[0029] In actual application, this embodiment is provided with a baffle 19 and a rotating rod 20 at the separation zone 7. When the visual inspection component 3 detects that the paper bag is qualified, the driving source drives the separation zone 7 to rotate to a horizontal state, so that the three baffles 19 connect the discharge end of the first conveyor belt 2 with the receiving port 24, which is equivalent to allowing the baffles 19 to fill the separation zone 7, ensuring that the paper bag can smoothly enter the receiving port 24 through the baffles 19. When the visual inspection component 3 detects that the paper bag is unqualified, the driving source drives the separation zone 7 to rotate to an inclined state, so that the discharge end of the first conveyor belt 2 is facing the rotating rod 20, and at this time the air outlet of the high-pressure jet component 13 is facing the gap between the discharge end of the first conveyor belt 2 and the rotating rod 20. In this way, the rotating rod 20 is used to directly block the paper bag from entering the receiving port 24, and the high-pressure airflow ejected downward by the high-pressure jet component 13 is combined to ensure that the unqualified paper bag eventually falls into the waste discharge chamber 8, thereby further improving the accuracy of paper bag classification.

[0030] like Figures 1-6 As shown, as a preferred embodiment of the present invention, a third static elimination bar 21 is fixedly installed on the frame 1, and the third static elimination bar 21 is located in the second conveyor belt 4. When the second conveyor belt 4 transports paper bags, the paper bags pass through the third static elimination bar 21 and the first photoelectric sensor 12 in sequence.

[0031] In actual application of this embodiment, since there are gaps between the three second conveyor belts 4, Figure 4As shown in the figure, for example, the first conveyor belt 2 and the second conveyor belt 4 clamp and convey the paper bag. When the paper bag passes through the third static eliminator 21, the third static eliminator 21 can absorb the static electricity from the gaps between the three second conveyor belts 4, thereby performing a static elimination operation before the paper bag is output from the second conveyor belt 4, thereby improving the separation effect between the second conveyor belt 4 and the paper bag.

[0032] See also Figures 1-6 As shown, the present invention is a waste discharge method of a paper bag defect detection device based on machine vision, which is applied to the paper bag defect detection device based on machine vision as described in the above embodiment, and the method includes the following steps: Step S1: Place the paper bag to be inspected on the first conveyor belt 2. The visual inspection component 3 starts to inspect the paper bag, and the inspection result is qualified or unqualified. Step S2: The paper bag is then conveyed from the first conveyor belt 2 alone to the first conveyor belt 2 and the second conveyor belt 4, thereby conveying the paper bag to the separation area 7; Step S3: The first conveyor belt 2 and the second conveyor belt 4 then convey the paper bag to the separation assembly, where the separation assembly assists in separating the paper bag from the first conveyor belt 2 and the second conveyor belt 4. At this point, the paper bag is again conveyed solely by the first conveyor belt 2. Step S4: When the paper bag is found to be qualified, the high-pressure jet assembly 13 is not activated. The first conveyor belt 2 conveys the paper bag to the receiving port 24, and then the first receiving belt 5 and the second receiving belt 6 jointly convey the paper bag. Step S5: When the inspection result of the paper bag is unqualified, the high-pressure jet assembly 13 is started, and the high-pressure gas ejected by the high-pressure jet assembly 13 blows the paper bag through the separation area 7 into the waste discharge chamber 8, and then the waste discharge conveyor belt 9 discharges the paper bag from the frame 1.

[0033] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A paper bag defect detection device based on machine vision, characterized in that: include: A frame (1) is provided with a first conveyor belt (2) and a second conveyor belt (4), the first conveyor belt (2) and the second conveyor belt (4) are used for clamping and conveying paper bags, the frame (1) is provided with a visual detection component (3), the visual detection component (3) is used for detecting paper bags at the feeding end of the first conveyor belt (2), the first conveyor belt (2) and the second conveyor belt (4) are staggered at the feeding end, and the second conveyor belt (4) is staggered at the feeding end. The material end faces the discharge end of the first conveyor belt (2), and a first receiving belt (5) and a second receiving belt (6) are provided on the frame (1). The first receiving belt (5) and the second receiving belt (6) are used to receive paper bags. The feeding ends of the first receiving belt (5) and the second receiving belt (6) form a receiving port (24). The discharge end of the first conveyor belt (2) faces the receiving port (24), and a separation zone (7) exists between the discharge end of the first conveyor belt (2) and the receiving port (24). A waste discharge chamber (8), wherein the waste discharge chamber (8) is arranged in the frame (1), the waste discharge chamber (8) is open, and the waste discharge chamber (8) is located below the separation zone (7), a waste discharge conveyor belt (9) is arranged in the waste discharge chamber (8), and an output end of the waste discharge conveyor belt (9) is located outside the frame (1); A fixing frame (10), the fixing frame (10) is fixedly mounted on the frame (1), a plurality of high-pressure jet assemblies (13) arranged at equal intervals are fixedly mounted on the fixing frame (10), the air outlet of the high-pressure jet assembly (13) faces the separation zone (7), the high-pressure jet assembly (13) is connected to the visual inspection assembly (3), and when the visual inspection assembly (3) detects that the paper bag is unqualified, the high-pressure jet assembly (13) is turned on to blow the unqualified paper bag passing through the separation zone (7) into the waste discharge chamber (8); A separation component is provided at the discharge ends of the second conveyor belt (4) and the first conveyor belt (2), and is used to separate the paper bags from the first conveyor belt (2) and the second conveyor belt (4).

2. The machine vision-based paper bag defect detection device according to claim 1, characterized in that: The number of the second conveyor belts (4) is three, and the three second conveyor belts (4) are arranged at equal intervals, and there is a gap between two adjacent second conveyor belts (4). An extension plate (11) is fixedly installed on the fixing frame (10), and a first photoelectric sensor (12) is fixedly installed on the extension plate (11). The first photoelectric sensor (12) is connected to the high-pressure jet assembly (13). The detection end of the first photoelectric sensor (12) is located in the gap between the two second conveyor belts (4), and the first photoelectric sensor (12) is located at the discharge end of the second conveyor belt (4). The first photoelectric sensor (12) is used to detect paper bags.

3. The machine vision-based paper bag defect detection device according to claim 2, characterized in that: The number of the second receiving belts (6) is three, and the three second receiving belts (6) are arranged at equal intervals, and there is a gap between two adjacent second receiving belts (6). A fixing plate (23) is fixedly installed on the frame (1), and a second photoelectric sensor (22) is fixedly installed on the fixing plate (23). The second photoelectric sensor (22) is connected to the visual detection component (3). The detection end of the fixing plate (23) is located in the gap between the two second feeding belts (4), and the fixing plate (23) is located at the feeding end of the first receiving belt (5) and the second receiving belt (6). The fixing plate (23) is used to detect paper bags.

4. The machine vision-based paper bag defect detection device according to claim 2, characterized in that: The separation component includes a first static elimination rod (14), a shovel (15) and a second static elimination rod (16). The first static elimination rod (14), the shovel (15) and the second static elimination rod (16) are all fixedly installed in the frame (1). When the paper bag moves from the discharge end of the second conveyor belt (4) to the discharge end of the first conveyor belt (2), the paper bag passes through the first static elimination rod (14), the shovel (15) and the second static elimination rod (16) in sequence. The first static elimination rod (14) is located above the first conveyor belt (2), the feed end of the shovel (15) abuts against the surface of the first conveyor belt (2), and the second static elimination rod (16) is located at the discharge end of the shovel (15), and the horizontal height of the second static elimination rod (16) is lower than the horizontal height of the discharge end of the shovel (15).

5. The machine vision-based paper bag defect detection device according to claim 4, characterized in that: The discharging end of the shovel plate (15) is provided with a chamfer (17).

6. The machine vision-based paper bag defect detection device according to claim 4, characterized in that: The separation assembly further comprises a rotating plate (18), a baffle (19) and a rotating rod (20), wherein the rotating plate (18) is rotatably mounted on the inner wall of the frame (1), the rotating plate (18) is driven to rotate by a driving source, and three baffles (19) are rotatably mounted on the rotating plate (18) at equal intervals, the rotating rod (20) is fixedly mounted on the baffle (19), and both the baffle (19) and the rotating rod (20) are located in the separation zone (7), the driving source is connected to the visual detection assembly (3), and when the visual detection When the component (3) detects that the paper bag is qualified, the driving source drives the separation zone (7) to rotate to a horizontal state, so that the three baffles (19) connect the discharge end of the first conveyor belt (2) with the receiving port (24). When the visual inspection component (3) detects that the paper bag is unqualified, the driving source drives the separation zone (7) to rotate to an inclined state, so that the discharge end of the first conveyor belt (2) faces the rotating rod (20), and at this time, the air outlet of the high-pressure jet component (13) faces the gap between the discharge end of the first conveyor belt (2) and the rotating rod (20).

7. The machine vision-based paper bag defect detection device according to claim 4, characterized in that: A third static elimination bar (21) is fixedly mounted on the frame (1). The third static elimination bar (21) is located in the second conveyor belt (4). When the second conveyor belt (4) conveys paper bags, the paper bags pass through the third static elimination bar (21) and the first photoelectric sensor (12) in sequence.

8. A method for discharging waste from a paper bag defect detection device based on machine vision, characterized in that: The method is applied to a machine vision-based paper bag defect detection device according to any one of claims 1 to 7, and the method comprises the following steps: Step S1: placing the paper bag to be inspected on the first conveyor belt (2), at which time the visual inspection component (3) starts to inspect the paper bag, and the inspection result is qualified or unqualified; Step S2: The paper bag is then conveyed by the first conveyor belt (2) alone and then clamped and conveyed by the first conveyor belt (2) and the second conveyor belt (4), thereby conveying the paper bag to the separation area (7); Step S3: The first conveyor belt (2) and the second conveyor belt (4) then convey the paper bag to the separation assembly, where the separation assembly assists the paper bag in being separated from the first conveyor belt (2) and the second conveyor belt (4). At this point, the paper bag is again conveyed solely by the first conveyor belt (2); Step S4: When the paper bag inspection result is qualified, the high-pressure jet assembly (13) is not started, and the first conveyor belt (2) conveys the paper bag to the receiving port (24), and then the first receiving belt (5) and the second receiving belt (6) jointly convey the paper bag; Step S5: When the inspection result of the paper bag is unqualified, the high-pressure jet assembly (13) is started, and the high-pressure gas ejected by the high-pressure jet assembly (13) blows the paper bag at the separation area (7) into the waste discharge chamber (8), and then the waste discharge conveyor belt (9) discharges the paper bag from the rack (1).

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