Seasoning packaging sealing performance detection system and detection method

Abstract

The invention provides a seasoning package sealing detection system and detection method, and mainly relates to the field of sealing detection. A seasoning packaging sealing performance detection system comprises a conveying system and a detection mechanism, the detection mechanism is arranged on the conveying system, a front conveying belt is provided with a material arranging assembly used for separating densely stacked packaging bags, and the detection mechanism comprises an obliquely-arranged mounting channel located on the rear side of the conveying system. A transparent bearing plate is arranged in the mounting channel, and the bearing plate part in the mounting channel can slide out to the side face of the mounting channel. An overhead CCD is arranged at the top in the mounting channel, and a bottom CCD is arranged at the bottom in the mounting channel; cleaning mechanisms corresponding to the bearing plates are arranged on the outer sides of the mounting channels, and removing mechanisms are arranged at the tail ends of the mounting channels. The packaging bag double-face sealing detection device has the beneficial effects that through the one-time double-face detection function, double-face sealing of a packaging bag can be detected at the same time, and the screening efficiency of defective products is improved.

Description

Technical Field

[0001] The present invention mainly relates to the field of seal detection, and specifically, it is a seal detection system and method for condiment packaging. Background Art

[0002] The seal detection of condiments is a key link to ensure product quality and safety. As a food-related industry, zero tolerance for seal problems needs to be achieved to avoid food safety problems caused by unqualified products flowing into the market. Currently, the seal detection of condiments mainly includes pressure testing method, ultrasonic testing method, infrared detection method, and visual recognition method. Among them, the pressure testing method is not suitable for continuous full inspection operations on the production line. The ultrasonic testing method and the infrared detection method are mainly for bottled or canned products and cannot accurately detect the seal of bagged condiments. Therefore, visual recognition is usually used for rapid full inspection of bagged condiments. However, in actual applications, most condiment packaging bags are made of opaque materials. Therefore, only one side can be detected during the detection process. After one-sided detection, the seal condition of the other side is inferred based on the detection results. This method may cause missed detections and affect the detection success rate; or it may extend the detection process, add a complex turning structure, turn the packaging bag over and then perform another visual recognition detection. This method requires creating two sets of image acquisition environments for the visual recognition system, providing two sets of rejection mechanisms, and extending the overall conveyor line, occupying more space resources. Summary of the Invention

[0003] To solve the deficiencies of the prior art, the present invention provides a seal detection system and method for condiment packaging, which has a simple structure, high operation efficiency, occupies less space, and can simultaneously complete the seal detection of both sides of the condiment packaging bag, improving the detection efficiency and accuracy.

[0004] To achieve the above object, the present invention is realized through the following technical solutions: A seal detection system for condiment packaging includes a conveying system and a detection mechanism. The conveying mechanism serves as the conveying system for the condiment production line and is used to complete the sorting and conveying tasks of condiments. The detection mechanism is arranged on the conveying system and is used to complete the detection of both sides of the condiment packaging bag.

[0005] The conveying system includes a front conveyor belt and a rear conveyor belt. The speed of the rear conveyor belt is greater than that of the front conveyor belt, which can increase the distance between the conveyed condiments, providing a time difference for subsequent detection and avoiding the influence of too-close condiment packaging bags on the detection effect. A sorting component for separating densely stacked packaging bags is arranged on the front conveyor belt, and the sorting component separates the stacked packaging bags to ensure the accuracy of visual recognition.

[0006] The detection mechanism includes an inclined installation channel located at the rear side of the conveying system, a transparent supporting plate is arranged in the installation channel, the supporting plate is slidably connected to the side of the installation channel, and the supporting plate part in the installation channel can slide out to the side of the installation channel. A top CCD, a top sensor and a top light source are arranged at the top of the installation channel, and a bottom CCD, a bottom sensor and a bottom light source are arranged at the bottom of the installation channel; the transparent supporting plate makes it possible to synchronously acquire the double-sided images of the condiment packaging bag, so that the present invention can only create an environment for CCD camera to acquire images in the same small space for installing two CCD cameras, saving installation space and equipment costs, improving the efficiency of packaging bag image recognition, thereby improving the efficiency and accuracy of sealing detection, and reducing detection costs.

[0007] A cleaning mechanism corresponding to the carrying plate is arranged on the outside of the installation channel, and the cleaning mechanism is used for cleaning the dirt on the carrying plate. The design of the cleaning mechanism solves the cleaning problem after the condiment leaks, and no shutdown maintenance is required. Instead, only a small range of action adjustment is required to complete the problem of cleaning the leaked condiment without stopping the machine. The structure is simple and efficient, and can meet the needs of assembly line operations.

[0008] A rejection mechanism is arranged at the end of the installation channel, and the rejection mechanism includes a rejection frame, a hinged flap downstream of the rejection frame, and when the flap is not flipped, the flap is coplanar with the load-bearing plate, and when the flap is driven by the swing motor to flip downward, the rejection channel below is opened, and the end of the flap is connected to the downstream conveyor belt, and a rejection conveyor belt is arranged below the flap. The present invention uses a one-time double-sided detection function to simultaneously complete the detection of the double-sided seals of the packaging bag, and only one rejection mechanism is needed to complete the overall rejection operation, thereby improving the efficiency of screening defective products.

[0009] Preferably, the material sorting component includes a material dividing sheet and a guide device. The material dividing sheet is arranged above the front conveyor belt. The material dividing sheet is a soft sheet. The material dividing sheet abuts against the front conveyor belt. By moving a plurality of soft sheets, the stacked packaging bags can be pushed onto the conveyor belt, so that the stacked packaging bags are dispersed. The guide device is arranged between the front conveyor belt and the rear conveyor belt. The guide device is a pair of guide sheets symmetrically arranged, and the distance between the two guide sheets gradually decreases. The guide sheet arranges the conveying posture of the packaging bag so that the packaging bag can enter the rear conveyor belt more smoothly, providing conditions for subsequent image pickup.

[0010] Preferably, the carrier plate is a single plate, the width of the carrier plate is greater than twice the width of the installation channel, limiting slide rails are arranged on both sides of the installation channel, and sliding pairs that are slidably matched with the limiting slide rails are arranged on both sides of the bottom of the carrier plate. A slide table cylinder for driving the carrier plate to slide is arranged on at least one side of the installation channel. The carrier plate can slide in the installation channel, and there are two loading positions on the carrier plate. The two loading positions can alternately load the condiment packaging bags, so that after one loading position is contaminated, the other loading position can be quickly switched, thereby realizing non-stop detection and improving the detection efficiency.

[0011] Preferably, there are two carrier plates, and the two carrier plates are arranged in an up-and-down position relationship in the installation channel. Two groups of limiting slide rails corresponding to the carrier plates one by one are installed on one side of the installation channel, and a slide table cylinder for driving the carrier plate to slide is arranged on one side of each group of limiting slide rails. The two carrier plates respectively serve as a loading position, and the two carrier plates operate alternately. After one carrier plate is contaminated, the other carrier plate can fill the vacancy, realizing non-stop detection and improving the detection efficiency. Compared with the single-plate structure, the double-plate structure only requires one cleaning mechanism, thus streamlining the redundant structure of the cleaning mechanism.

[0012] Preferably, the front half of the carrier plate is in an opaque state, and there is a dark background plate at the rear side of the installation channel. The dark background plate is located above the transparent rear half of the carrier plate. This setting method makes the recognition background of the CCD camera for the packaging bag single, the recognition range clearer, and can effectively improve the accuracy of image recognition, thereby improving the detection accuracy.

[0013] Preferably, the cleaning mechanism includes a cleaning frame arranged outside the installation channel. The cleaning frame is parallel to the carrier plate. A pair of cleaning tracks and a linear driving mechanism are arranged at the bottom of the cleaning frame. A cleaning seat is slidably arranged on the cleaning tracks, a lifting device is arranged on the cleaning seat, and a cleaning component is arranged at the bottom of the lifting device.

[0014] Preferably, the cleaning component is a cleaning brush roll and / or a scraper, and both the cleaning brush roll and the scraper are made of soft elastic materials. Through the reciprocating cleaning component, the contaminated seasonings on the carrier plate can be effectively removed, so as to meet the detection requirements of non-stop operation.

[0015] A method for detecting the sealing performance of condiment packaging includes the following steps: S1: After the condiment is heat-sealed and packaged, it is conveyed down from the upstream process. The condiment packaging bags are sorted by the sorting component to separate the stacked condiment packaging bags and convey them individually. The conveyed condiment packaging bags pass through the detection mechanism in turn.

[0016] S2: The condiment packaging bag passes through the transparent carrier plate. Under the action of gravity, the packaging bag slides off the carrier plate. During the sliding process, the top sensor and the bottom sensor are triggered, so that the top CCD and the bottom CCD complete the image acquisition of the upper and lower sides of the packaging bag. After the image acquisition of the upper and lower sides of the condiment packaging bag is completed at one time during the falling process, the control terminal preprocesses the acquired images, and then performs feature extraction through an image analysis algorithm to detect whether the sealing line has defects. The defects include whether the sealing line is complete, whether there is a missed seal, wrinkles, breakage, and occlusion of the sealing edge, etc. Based on the extracted feature values, the system will compare the image with a preset standard template to determine whether the sealing of the packaging bag meets the requirements.

[0017] S3: Based on the image analysis results of both sides, only when the detection results of both sides are okay, it is judged as a qualified product. The qualified products are directly diverted to the subsequent downstream conveyor belt for subsequent packaging processes. If at least one of the data items on both sides does not meet the standard, the unqualified products are removed through the rejection mechanism. Specifically, the flap is flipped to divert the unqualified products to the rejection conveyor belt for collection.

[0018] Preferably, before performing step S2, the condiment packaging bag is shaped to flatten the sealing edge of the packaging bag. This action can preprocess the condiment packaging bag in advance, flatten the condiment packaging bag, expose all the edges of the condiment packaging bag, and facilitate the CCD to collect the complete edge sealing line image.

[0019] Compared with the prior art, the beneficial effects of the present invention are: The present invention realizes the integration of the double-sided visual recognition sealing detection system for condiment packaging bags. The double systems for double-sided detection are integrated in the same space. The image acquisition of both sides of the packaging bag can be completed in one pass, improving the detection efficiency, streamlining the detection structure, and shortening the running length of the overall conveyor line.

[0020] The present invention provides a method for synchronous detection after obtaining the double-sided images of the packaging bag, which can accurately obtain the double-sided images of the packaging bag. Compared with single-sided detection, it can avoid the blind area on the back of the packaging bag, improve the detection accuracy, and further eliminate the possibility of defective products flowing into the market.

[0021] In view of the possible pollution problems in the double-sided detection process, the present invention designs an automatic cleaning and replacement mechanism for the carrier plate, which can automatically clean the pollutants on the carrier plate without affecting the overall detection and ensure the smooth operation of the production line. Brief Description of the Drawings

[0022] Att Figure 1 is the schematic structural diagram of Embodiment 1 of the present invention; Att Figure 2 is the schematic structural diagram of Embodiment 2 of the present invention; Attached Figure 3 is a schematic top view of the detection mechanism part in Embodiment 2 of the present invention; Attached Figure 4 is a schematic left view of the detection mechanism part in Embodiment 2 of the present invention; Attached Figure 5 is of the present invention Figure 2 partial enlarged schematic view of part A; Attached Figure 6 is a schematic top view of the detection mechanism part in Embodiment 3 of the present invention; Attached Figure 7 is a schematic left view of the detection mechanism part in Embodiment 3 of the present invention; Attached Figure 8 is a schematic diagram of the structure of Embodiment 4 of the present invention; Attached Figure 9 is a schematic front view of the detection mechanism in Embodiment 2 of the present invention; Attached Figure 10 is of the present invention Figure 9 schematic B - B sectional view of the detection mechanism; Attached Figure 11 is a schematic front view of the detection mechanism in Embodiment 3 of the present invention; Attached Figure 12 is of the present invention Figure 11 schematic C - C sectional view of the detection mechanism; Attached Figure 13 is a schematic sectional view of the detection mechanism in Embodiment 4 of the present invention.

[0023] Reference numerals shown in the drawings: 1, conveying system; 2, detection mechanism; 3, sorting component; 4, cleaning mechanism; 5, rejection mechanism; 6, rejection conveyor belt; 7, downstream conveyor belt; 8, shaping device; 11, front conveyor belt; 12, rear conveyor belt; 21, installation channel; 22, bearing plate; 23, top CCD; 24, bottom CCD; 25, slide table cylinder; 26, limit slide rail; 27, dark background plate; 31, sorting piece; 32, guide vane; 41, cleaning frame; 42, cleaning track; 43, linear driving mechanism; 44, cleaning seat; 45, lifting device; 46, cleaning component; 51, rejection frame body; 52, flap; 81, shaping frame; 82, elastic stretching frame; 83, shaping roller. Detailed Embodiments

[0024] In combination with the drawings and specific embodiments, the present invention will be further described. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application. Embodiment 1

[0025] A condiment packaging sealing detection system mainly consists of a conveying system 1 and a detection mechanism 2. The conveying system 1 completes the conveying of bagged condiments, so that the bagged condiments can be stably conveyed. Specifically, a material sorting component 3 is also installed on the conveying system 1. The material sorting component 3 separates the overlapping condiment packaging bags and adjusts the spacing of the condiment packaging bags so that the condiments can stably pass through the detection mechanism 2 individually, thereby completing the accurate identification and detection of the condiment packaging. The detection mechanism 2 is a detection system based on visual recognition. The condiment packaging is imaged by a CCD industrial camera, and the collected image is preprocessed such as denoising, contrast enhancement, edge sharpening, etc. The system extracts key features from the preprocessed image, such as the continuity, width, length, area, etc. of the sealing line. Through the image analysis algorithm, it is identified whether the sealing line is complete, whether there are defects such as leakage, wrinkles, and damage. Based on the extracted feature values, the system compares the image with the preset standard template to determine whether the sealing of the packaging bag meets the requirements. For the detected defects, the system can further classify them, such as incomplete sealing, sealing line offset, surface foreign matter, etc. Finally, the test results will be displayed on the monitoring screen in real time, and the system will output qualified or unqualified signals. For unqualified packaging bags, the system can automatically trigger the rejection device to remove them from the production line.

[0026] Conveying system: The conveying system 1 is a conveying mechanism for producing bagged condiments, which uses a belt conveyor for conveying, and conveys the bagged condiments to the detection mechanism 2 through the conveyor belt to complete the sealing test. Specifically, the conveying system 1 should include a front conveyor belt 11 and a rear conveyor belt 12. The conveying rate of the rear conveyor belt 12 is higher than that of the front conveyor belt 11. By changing the conveying rate, the distance between adjacent bagged condiments can be lengthened, providing conditions for subsequent sealing tests.

[0027] The material sorting component 3 is installed on the front conveyor belt 11. The material sorting component 3 includes a material dividing sheet 31 at the top and a guide device between the front conveyor belt 11 and the rear conveyor belt 12. The material dividing sheet 31 is a soft sheet. The material dividing sheet 31 is bent and abuts against the front conveyor belt 11. When the bagged condiment passes through the material dividing sheet 31, the material dividing sheet 31 will press and move the condiment. The stacked conveyed packaging bags will be blocked because the friction between the bags is small. The friction between the packaging bags and the front conveyor belt 11 is large, which can overcome the resistance of the material dividing sheet 31 and pass through, thereby achieving the effect of stacked conveyed bagged condiment powder. Specifically, multiple material dividing sheets 31 can be set, and the separation of the condiment packaging bags can be better achieved through the action of multiple material dividing sheets 31.

[0028] The diversion device is a pair of gradually changing diversion vanes 32, and the distance between the diversion vanes 32 decreases from the upstream to the downstream, which can divert and sort the conveyed bagged seasonings, enabling the seasonings to be in the correct position and be stably conveyed at the central position of the rear conveyor belt 12.

[0029] Detection mechanism: The detection mechanism 2 includes an installation channel 21 for detection. The installation channel 21 is installed obliquely at the end of the rear conveyor belt 12. After the seasonings are conveyed by the rear conveyor belt 12 to the installation channel 21, they slide down through the installation channel 21 under the action of gravity. A bearing plate 22 is installed in the installation channel 21. The bearing plate 22 is made of transparent acrylic or glass material, and the bearing plate 22 is slidably connected to the side of the installation channel 21. By actively or passively sliding the bearing plate 22, the part of the bearing plate 22 located inside the installation channel 21 can be slid out to the outside of the installation channel 21. In this embodiment, when the bearing plate 22 is contaminated by the leaked seasonings, it is identified and detected by the top CCD 23 and the bottom CCD 24. At this time, the duty personnel are notified to handle it, and the operator manually takes out the bearing plate 22 and replaces it. Since the probability of the seasoning sealed bag being unsealed and leaking is relatively low under normal sealing operations, the method of manually replacing the bearing plate 22 will not have too much impact on the overall assembly line production.

[0030] At the top inside the installation channel 21, a top CCD 23, a top sensor, and a top light source are provided. The above top structure serves as an identification component for the top surface of the packaging bag and is used to identify the sealing state of the top surface of the packaging bag. At the bottom inside the installation channel 21, a bottom CCD 24, a bottom sensor, and a bottom light source are provided. The above bottom structure serves as an identification component for the bottom surface of the packaging bag and is used to identify the sealing state of the bottom surface of the packaging bag. Through the cooperation of the top structure and the bottom structure, the double-sided identification of the packaging bag can be completed during the single falling and sliding process of the packaging bag, so as to conduct a more perfect and accurate sealing identification and detection of the sealing state of the opaque packaging bag, improve the detection rate of defective products, and avoid food safety accidents caused by defective products flowing into the market.

[0031] At the end of the installation channel 21, there is a rejection mechanism 5. The rejection mechanism 5 is connected below the bearing plate 22, and the rejection mechanism 5 is a structure of a flap 52. Specifically, the rejection mechanism 5 includes a rejection frame body 51. A flap 52 is hinged in the middle of the rejection frame body 51, and a swing motor for driving the flap 52 to swing is installed at the bottom of the rejection frame body 51. When the flap 52 is not flipped, the flap 52 is coplanar with the bearing plate 22. When the flap 52 is driven by the swing motor to flip downward, the lower rejection channel is opened. A downstream conveyor belt 7 is connected to the end of the flap 52, and the qualified products are directly diverted to the downstream conveyor belt 7 for conveying. When unqualified products are detected, the flap 52 flips downward to make the unqualified products fall onto the lower rejection conveyor belt 6 for separate collection. Example 2

[0032] Based on Example 1, in this example, the bearing plate 22 is a single plate, and the width of the bearing plate 22 is greater than twice the width of the installation channel 21. Limit sliding rails 26 are installed on both sides of the installation channel 21. A sliding pair cooperating with the limit sliding rails 26 is provided at the bottom of the bearing plate 22. A slide table cylinder 25 is installed on at least one side of the installation channel 21. The slide table cylinder 25 is used to drive the bearing plate 22 to slide in the left - right direction. In this example, the slide table cylinder 25 can drive both sides of the bearing plate 22 to be respectively exposed on both sides of the bearing plate 22. At this time, the unexposed bearing plate 22 is located in the installation channel 21 as a slideway for the condiment packaging bag to slide down.

[0033] In this example, cleaning mechanisms 4 are installed on both sides of the installation channel 21. The cleaning mechanisms 4 are used to scrape the dirt on the bearing plate 22. Since there are products with poor sealing in the condiment packaging bags, there may be leakage of condiments. Once a leakage problem occurs, the CCD camera can identify the abnormal residue when there is no condiment passing through. At this time, the slide table cylinder 25 is used to control the sliding of the bearing plate 22, move the clean side into the installation channel 21, and expose the dirty bearing plate 22 on the other side to the outside of the installation channel 21, and the cleaning mechanism 4 on its side is used to clean the dirt.

[0034] Specifically, the cleaning mechanism 4 includes a cleaning frame 41 arranged parallel to the bearing plate 22, and the cleaning frame 41 is installed on the outer side of the installation channel 21. A pair of cleaning tracks 42 are installed at the bottom of the cleaning frame 41. A linear driving mechanism 43 is installed in parallel on the cleaning tracks 42. The linear driving mechanism 43 can adopt a lead screw drive or a synchronous belt drive. A cleaning seat 44 is slidably installed on the cleaning tracks 42. A lifting device 45 is installed on the cleaning seat 44, and cleaning components 46 such as a cleaning brush roller and a scraper are installed at the end of the lifting device 45. The lifting device 45 adopts a lead screw transmission structure. Specifically, there is a lifting frame below the cleaning seat 44. There are at least a pair of linear guide rails on the lifting frame. The cleaning seat 44 has sleeves cooperating with the linear guide rails. A driving shaft is rotatably installed on the lifting frame, and a driving motor for driving the driving shaft to rotate is provided on the lifting frame. The top of the driving shaft is a lead screw structure, and a lead screw nut cooperating with the lead screw is fixedly installed on the cleaning seat 44. Through the drive of the driving motor, the lifting frame can be driven to perform a stable lifting action under the limitation of the linear guide rails. The cleaning components 46 are installed at the bottom of the lifting frame and are used to contact the bearing plate 22 to clean the leaked condiments. More specifically, the cleaning brush roller, scraper, etc. as the cleaning components 46 are made of elastic materials and can be abutted against the bearing plate 22 to complete better cleaning. When using the cleaning brush roller as the cleaning component 46, a motor should be installed inside the cleaning brush roller as the power to drive the cleaning brush roller to rotate at a high speed, making the cleaning of the leaked condiments more efficient. Example 3

[0035] Based on Example 1, in this example, two bearing plates 22 are provided. The two bearing plates 22 are installed in an up-and-down positional relationship, and each bearing plate 22 corresponds to a set of limit slide rails 26. In this example, the limit slide rails 26 are only installed on one side of the installation channel 21. A slide table cylinder 25 is installed on one side of the limit slide rail 26 to drive the bearing plate 22 to expand and contract. When detecting the sealing performance of the condiment packaging bag, only one bearing plate 22 is located in the installation channel 21 for bearing.

[0036] In this example, the lower bearing plate 22 is coplanar with the flap 52, and there is a certain distance between the upper bearing plate 22 and the flap 52. When the upper bearing plate 22 is located in the installation channel 21 as the bearing of the condiment packaging bag, after the packaging bag slides to the end of the bearing plate 22, it undergoes a certain distance of free fall and drops onto the flap 52, and then the flap 52 screens according to the detection results, selects to be rejected or released as a qualified product onto the downstream conveyor belt 7. The distance between the lower bearing plate 22 and the upper bearing plate 22 is within 1 cm, so it will not affect the dropping of the condiment packaging bag.

[0037] Since the structure of alternating use of the double-layer bearing plates 22 is adopted in this example, the cleaning mechanism 4 only needs to be arranged at the top on one side where the limit slide rails 26 are installed. One cleaning mechanism 4 can complete the alternating cleaning of the two bearing plates 22, and while completing the cleaning, it does not affect the use of the other bearing plate 22. Compared with Example 1, in this example, the cleaning action of the bearing plate 22 and the action of bearing the condiment packaging bag do not interfere with each other, which can ensure the stable bearing of the condiment by the bearing plate 22 and make the images obtained by the upper and lower CCDs clearer and more accurate. Example 4

[0038] Based on Example 1, Example 2 or Example 3, in this example, the top CCD 23 and the bottom CCD 24 are arranged alternately. The top CCD 23 is located at the front side position of the installation channel 21, and the bottom CCD 24 is located at the rear side position of the installation channel 21. Therefore, when obtaining the image of the condiment packaging bag, the top CCD 23 first obtains the image. Subsequently, when the condiment slides down further under the action of gravity, the bottom CCD 24 obtains the image. This structure makes the image acquisition of the condiment packaging bag more accurate, can be less interfered by the complex background, and reduces the burden on the subsequent image recognition and processing.

[0039] Correspondingly, in this embodiment, the front half of the carrier plate 22 is opaque, and a dark background plate 27 is provided at the rear side of the installation channel 21 (i.e., the top of the rear half of the carrier plate 22). Through the cooperation of this structure, the background of the condiment image can be made monotonous when the CCD acquires the image, which is more conducive to the recognition accuracy of the image edge.

[0040] Compared with Embodiment 1 and Embodiment 2, the structure of this embodiment is more accurate in identifying the condiment packaging bag, but it elongates the equipment space in the overall layout. The advantages and disadvantages need to be determined according to actual requirements. Embodiment 5

[0041] In this embodiment, a targeted design is carried out for the sauce products in the seasonings. Among the seasonings, the powder seasonings have a small viscosity, and the packaging bags can be laid flat relatively smoothly during transportation, exposing the sealed edges, which is convenient for the CCD to acquire images. For the sauce seasonings, due to their large viscosity, the packaging bags will deform due to the viscosity of the sauce, resulting in the inability of the sealed edges of the packaging bags to effectively unfold. This leads to the inability to accurately detect the sealing condition of the sealed edges after the image recognition of the sealed edges, resulting in poor detection results.

[0042] Based on the above problems, in this embodiment, on the basis of Embodiment 1 / 2 / 3 / 4, a shaping device 8 is added to the rear conveyor belt 12. Through the extrusion action of the shaping device 8, the packaging bags of the sauce seasonings are flattened, so that the sealed edges can be completely exposed without being blocked, thereby obtaining a complete image of the sealed edges.

[0043] Specifically, the shaping device 8 includes a shaping frame 81 that spans the frame of the rear conveyor belt 12. At least one elastic stretching frame 82 is provided on the shaping frame 81. A shaping roller 83 is rotatably installed at the bottom of the elastic stretching frame 82. Through the extrusion operation of the shaping roller 83, the sauce seasonings can be extruded to flatten the sauce seasonings. To improve the flattening effect, in this embodiment, a plurality of elastic stretching frames 82 are linearly arranged, and the shaping rollers 83 thereon gradually decrease in height from upstream to downstream, so that the packaging bags of the sauce seasonings can be extruded progressively, and the packaging bags of the sauce seasonings can be gradually flattened, avoiding being stuck or squeezed and broken due to excessive extrusion.

[0044] Specifically, the elastic stretching frame 82 includes a limit sleeve provided on the shaping frame 81 and a stretching slide rail that cooperates with the limit sleeve. The stretching slide rail can stably lift and slide under the restriction of the limit sleeve. The top of the stretching slide rail has a shoulder, and the diameter of the shoulder is larger than the diameter of the limit sleeve. A buffer spring is provided between the bottom of the stretching slide rail and the limit sleeve. Through the elastic action of the buffer spring, the shaping frame 81 can be driven to stretch downward and abut. When the sauce and condiment packaging bag is conveyed by the rear conveyor belt 12 and passes under the shaping device 8, the sauce and condiment will push the shaping roller 83, driving the buffer spring to be compressed, so that the sauce and condiment can be elastically extruded and flattened.

[0045] When using this system to detect the sealing performance of condiments, first, the sorting component 3 separates the stacked condiment packages so that the condiments can be conveyed individually, providing conditions for subsequent visual recognition to determine whether the sealing is good or not. Subsequently, by changing the speeds of the front conveyor belt 11 and the rear conveyor belt 12, the distance between adjacent condiment packages is increased, providing sufficient time for subsequent visual recognition. The condiment package is released at the end of the rear conveyor belt 12 and passes through the installation channel 21 under its own gravity. During this process, the top sensor and the bottom sensor are triggered, and the top CCD 23 and the bottom CCD 24 collect images of the upper and lower surfaces of the condiment packaging bag and preprocess the collected images. Through the image analysis algorithm, it is identified whether the sealing line is complete, whether there are defects such as unsealed, wrinkled, or damaged areas. Based on the extracted feature values, the system compares the image with a preset standard template to determine whether the sealing of the packaging bag meets the requirements. Finally, based on the image analysis results of both sides, if each data item on both sides meets the standard, the qualified products are directly diverted to the subsequent downstream conveyor belt 7 for subsequent packaging processes. If at least one of the data items on both sides does not meet the standard, the flap 52 flips, diverting the unqualified products to the rejection conveyor belt 6 for collection.

Claims

1. A seasoning packaging sealing detection system, comprising a conveying system (1) and a detection mechanism (2), characterized in that: The conveying system (1) comprises a front conveyor belt (11) and a rear conveyor belt (12), the speed of the rear conveyor belt (12) being greater than the speed of the front conveyor belt (11), and the front conveyor belt (11) is provided with a material sorting component (3) for separating densely stacked packaging bags; the detection mechanism (2) comprises an inclined mounting channel (21) located at the rear side of the conveying system (1), a transparent carrying plate (22) is arranged in the mounting channel (21), the carrying plate (22) is slidably connected to the side of the mounting channel (21), and a cleaning mechanism (4) corresponding to the carrying plate (22) is arranged outside the mounting channel (21), and the cleaning mechanism (4) is used to clean the packaging bags on the carrying plate (22). The dirt is cleaned; a top CCD (23), a top sensor and a top light source are arranged at the top of the installation channel (21); a bottom CCD (24), a bottom sensor and a bottom light source are arranged at the bottom of the installation channel (21); a rejection mechanism (5) is arranged at the end of the installation channel (21); the rejection mechanism (5) comprises a rejection frame (51), and a hinged flap (52) downstream of the rejection frame (51); when the flap (52) is not turned over, the flap (52) and the supporting plate (22) are coplanar; when the flap (52) is turned downward, the rejection channel below is opened; the end of the flap (52) is connected to a downstream conveyor belt (7); and a rejection conveyor belt (6) is arranged below the flap (52).

2. A condiment packaging sealing detection system according to claim 1, characterized in that: The material sorting component (3) comprises a material dividing sheet (31) and a guide device, wherein the material dividing sheet (31) is arranged above the front conveyor belt (11), the material dividing sheet (31) is a soft sheet, the material dividing sheet (31) abuts against the front conveyor belt (11), the guide device is arranged between the front conveyor belt (11) and the rear conveyor belt (12), the guide device is a pair of guide sheets (32) symmetrically arranged, and the distance between the two guide sheets (32) gradually decreases.

3. A condiment packaging sealing detection system according to claim 1, characterized in that: The bearing plate (22) is a single plate, the width of the bearing plate (22) is greater than twice the width of the mounting channel (21), limiting slide rails (26) are arranged on both sides of the mounting channel (21), sliding pairs that slidably cooperate with the limiting slide rails (26) are arranged on both sides of the bottom of the bearing plate (22), and a slide cylinder (25) for driving the bearing plate (22) to slide is arranged on at least one side of the mounting channel (21).

4. A condiment packaging sealing detection system according to claim 1, characterized in that: Two bearing plates (22) are provided, and the two bearing plates (22) are arranged in an upper and lower position relationship in the installation channel (21). Two groups of limiting slide rails (26) corresponding to the bearing plates (22) are installed on one side of the installation channel (21), and a slide cylinder (25) for driving the bearing plate (22) to slide is provided on one side of each group of limiting slide rails (26).

5. A condiment packaging sealing detection system according to any one of claims 3-4, characterized in that: The front half of the carrying plate (22) is in an opaque state, and the rear side of the installation channel (21) is provided with a dark background plate (27), wherein the dark background plate (27) is located above the transparent rear half of the carrying plate (22).

6. A condiment packaging sealing detection system according to claim 1, characterized in that: The cleaning mechanism (4) comprises a cleaning frame (41) arranged outside the installation channel (21), the cleaning frame (41) being parallel to the carrying plate (22), a pair of cleaning rails (42) and a linear drive mechanism (43) being arranged at the bottom of the cleaning frame (41), a cleaning seat (44) being slidably arranged on the cleaning rails (42), a lifting device (45) being arranged on the cleaning seat (44), and a cleaning assembly (46) being arranged at the bottom of the lifting device (45).

7. A condiment packaging sealing detection system according to claim 6, characterized in that: The cleaning component (46) is a cleaning roller brush and / or a scraper, and the cleaning roller brush and the scraper are both made of soft elastic material.

8. A method for detecting the sealing property of condiment packaging, characterized in that: The following steps are involved: S1: sorting the packaged condiments, separating the stacked condiment packaging bags and conveying them individually, and the conveyed condiment packaging bags pass through the inspection mechanism in sequence; S2: The condiment packaging bag passes through a transparent carrying plate, and the images of the upper and lower surfaces of the condiment packaging bag are collected at one time during the falling process. The collected images are processed and feature extracted to detect whether the sealing line has defects; S3: Only when the inspection results on both sides are correct, the product is judged as qualified. If there is a sealing defect on at least one side, the unqualified product will be rejected by the rejection mechanism.

9. A method for detecting the sealing performance of condiment packaging according to claim 8, characterized in that: In S2, the defects of the sealing line include leakage, wrinkles, damage and obstruction of the sealing edge.

10. A method for detecting the sealing performance of condiment packaging according to any one of claims 8 to 9, characterized in that: Before performing step S2, the condiment packaging bag is shaped so that the sealing edge of the packaging bag is flattened.

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