Weighing visual inspection sorting machine

Abstract

The utility model relates to the technical field of automatic sorting equipment, in particular to a weighing visual inspection sorting machine, which realizes full-automatic design of product conveying, weighing, multi-angle detection and sorting by integrating a weighing module, a dynamic visual inspection system and a servo driving technology. By adopting the modular design, rapid maintenance and function extension are supported, the production efficiency and the detection precision are remarkably improved, and the system is suitable for intelligent production lines in industries such as food and beverage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic sorting equipment, in particular to an intelligent sorting machine integrating weighing and visual detection functions, which is suitable for quality control of food and beverage packaging industries. BACKGROUND

[0002] A pop can is a kind of metal container widely used in liquid packaging such as beverages and beer, and its core feature is to achieve quick opening through the design of a pull ring. A typical pop can production line includes the following links: 1. sheet stamping: stamping a metal sheet into a can body blank; 2. stretch forming: processing the blank into a cylindrical can body through a multi-stage stretching process; 3. cleaning and drying: removing stamping oil stains and metal debris (traditionally, high-pressure water washing is used, which is water-intensive and prone to water stains); 4. printing and coating: printing marks on the outer surface and spraying anticorrosive coating on the inner wall; 5. necking and flanging: necking the can mouth to fit the can lid and flanging the edge to enhance the sealing performance; 6. can lid assembly: installing the pull ring and sealing ring, and packaging the finished product after detection.

[0003] The existing pop can sorting equipment mostly uses single weighing or visual detection technology, which has the following problems:

[0004] 1. Weighing and detection are separated, which is low in efficiency;

[0005] 2. The visual detection angle is fixed, which is prone to missed detection;

[0006] 3. The structure is complex, and the maintenance cost is high. SUMMARY

[0007] The present application aims to provide a high-efficiency, accurate and easy-to-maintain weighing and visual detection sorting machine, which integrates weighing, dynamic visual detection and modular design to solve the deficiencies of the prior art.

[0008] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0009] The present application provides a weighing and visual detection sorting machine, which comprises a rack, a weighing conveyor, a visual detection system and an operation platform; the rack is used to support various functional modules; the weighing conveyor is installed on the rack and comprises a conveying module, a weighing module and a weighing shelf; the conveying module is arranged on the weighing shelf and is driven by a first servo motor, and is used to convey products to be detected; the weighing module is arranged below the weighing shelf and is used to weigh in real time during the conveying process; the visual detection system comprises a camera, a servo sliding table and a servo elevator; the servo sliding table drives the camera to move horizontally, and the servo elevator drives the camera to move vertically, so as to realize multi-angle and multi-direction visual detection of the products; and the operation platform is used to control the coordinated action of the weighing conveyor, the servo sliding table and the servo elevator.

[0010] Further, the sorting machine further comprises a light source module installed on the rack for providing auxiliary lighting for visual detection.

[0011] Further, the servo sliding table comprises a sliding rail, a first screw rod, a second servo motor and a sliding block, the sliding rail is arranged in parallel with the first screw rod, the sliding block is in transmission connection with the first screw rod and the camera, and the second servo motor drives the first screw rod to rotate through a shaft coupling, so as to realize horizontal displacement of the camera.

[0012] Further, the servo lifting machine comprises a guide rod, a second screw rod, a speed reducer and a push rod sleeve, the push rod sleeve is in transmission connection with the second screw rod and the camera, and the third servo motor drives the second screw rod to rotate through the speed reducer, so as to push the push rod sleeve to ascend and descend along the guide rod, thereby realizing vertical displacement of the camera.

[0013] Further, the camera of the visual detection system is an industrial CCD camera or a CMOS camera, and the camera is equipped with a replaceable lens, and the focal length range of the lens is 20mm to 200mm.

[0014] Further, the light source module comprises a plurality of long-strip LED light strips, the plurality of LED light strips are arranged around the weighing conveyor, and the brightness and color temperature of the light source can be adjusted through the operation platform.

[0015] Further, the operation platform comprises a man-machine interface and a PLC controller, the man-machine interface is used for setting sorting parameters, and the PLC controller communicates with the first servo motor, the second servo motor, the third servo motor and the weighing module through a bus protocol.

[0016] Further, the rack is of a modular design and comprises a conveying box body, an electrical box body and a cantilever support, the weighing conveyor and the visual detection system are arranged in the conveying box body, the control host of the camera is arranged in the electrical box body, the conveying box body and the electrical box body are respectively provided with openable operation doors, the cantilever support is used for connecting the operation platform, and each component is connected through bolts or buckles.

[0017] Further, the sorting machine further comprises a sorting execution mechanism, the sorting execution mechanism is a pneumatic push cylinder or a mechanical arm, and is installed at the tail end of the weighing conveyor and used for rejecting unqualified products according to detection results.

[0018] Further, the sorting machine is suitable for quality detection and sorting of pop cans, bottled foods or small-sized packaged products.

[0019] The sorting machine has the following beneficial effects:

[0020] 1. Weighing and visual detection are completed synchronously, and the efficiency is improved by more than 30%.

[0021] 2. Servo slide and elevator cooperate to control camera movement, detect coverage without dead angle;

[0022] 3. Modular design facilitates quick replacement of spare parts, maintenance cost reduced by 50%. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 According to some embodiments of the present application, the overall structure schematic diagram of the weighing visual detection sorting machine is shown;

[0024] Figure 2 According to some embodiments of the present application, the internal structure schematic diagram of the weighing visual detection sorting machine is shown;

[0025] Figures 3-4 According to some embodiments of the present application, the structure schematic diagram of the weighing conveyor is shown;

[0026] Figures 5-6 According to some embodiments of the present application, the structure schematic diagram of the servo slide is shown;

[0027] Figures 7-8 According to some embodiments of the present application, the structure schematic diagram of the servo elevator is shown;

[0028] Figure 9 According to some embodiments of the present application, the structure schematic diagram of the operation platform and cantilever support is shown. DETAILED DESCRIPTION

[0029] The technical features and advantages of the present application will be described in more detail below in conjunction with the drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the scope of protection of the present application can be more clearly and explicitly defined.

[0030] It should be noted that in the description of the present application, the terms indicating the direction or position relationship of "up", "down", "left", "right", "in", "out" and the like are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the importance of the technical features shown.

[0032] In addition, it needs to be explained that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Please refer to Figures 1-9 The weighing visual detection sorting machine provided by the present application comprises a rack 1, a weighing conveyor 2, a visual detection system 3 and an operation platform 4. The various components of the weighing visual detection sorting machine will be described in detail below, including structure, function principle and connection mode, etc.

[0034] I. Rack 1: It is used to provide stable support for the components such as the conveying weighing machine 2 and the visual detection system 3. The main frame is made of high-strength aluminum alloy profile and is welded, including rack main body, side plate, top cover plate and bottom plate, etc. The components are fixed by bolts or buckles. The rack 1 is divided into three modules by the components: the support box body 14 at the bottom, the conveying box body 11 in the middle and the electrical box body 12 at the top. The space for arranging the weighing conveyor 2 and the visual detection system 3 is formed in the conveying box body 11, and the space for arranging the camera control host 34 is formed in the electrical box body 12. The conveying box body 11 and the electrical box body 12 are respectively provided with openable operation doors, which are convenient for opening and operating. In addition, the upper part of the rack 1 is also provided with a cantilever support 13, which is connected with the rack main body through a hinge and a handle, supports multi-angle adjustment, and is convenient for folding and storing. The cantilever support 13 is used to install the operation platform 4, and the installation height can be set at a height suitable for human standing operation. In other embodiments, the material of the rack 1 can also be replaced by carbon fiber composite material to reduce the weight; the quick release locking mechanism (such as magnetic connection) can be used instead of bolts between the side plate, top cover plate and rack 1 main body to improve the assembly efficiency.

[0035] II. Weighing conveyor 2: it includes conveying module 21 and weighing module 22, conveying module drives conveying belt 211 uniform motion by first servo motor 212, conveying products to be detected; weighing module 22 collects product weight data in real time during conveying, and transmits to operation platform 4 through signal line. Specifically, conveying module 21 includes conveying belt 211, first servo motor 212, first speed reducer 213, synchronous belt drive mechanism 214, conveying belt 211 is driven by first servo motor 212 in turn through first speed reducer 213, synchronous belt drive mechanism 214, realizing conveying of products to be detected. Photoelectric sensor 215 is arranged at the input end of conveying belt 211, which is used to detect the position of the product, so as to trigger the weighing and visual detection action. Synchronous belt cover 216 can be arranged outside the synchronous belt, which is used to protect the synchronous belt from pollution, and the synchronous belt cover 216 can be made of ABS material by injection molding. Weighing module 22 is integrated below conveying module 21, and is connected to conveying module 21 through weighing shelf 23, weighing module 22 is connected to weighing shelf 23 through upper module fixing plate 24, and is bolted to rack 1 through lower module fixing plate 25. Piezoelectric sensor can be used in weighing module 22 to improve the accuracy. In other embodiments, conveying belt 211 can also be replaced by plate chain conveying structure, which is more suitable for heavy products.

[0036] III. Visual inspection system 3: including industrial camera 31, servo slide 32 and servo elevator 33; industrial camera 31 is matched with replaceable lens, and is connected with lens through quick release interface, and is fixed at multiple angles through optical axis and cross clamp. Camera 31 shoots the image of the surface of the product, and detects defects through image processing algorithm.

[0037] Servo slide 32 includes slide rail 321, first screw 322, second servo motor 323, coupling 324, sliding block 325 and sliding block connecting plate 326, servo slide 32 is bolted to rack 1, slide rail 321 and first screw 322 are installed in parallel, second servo motor 323 is directly connected with first screw 322 through coupling 324, second servo motor 323 drives first screw 322 to rotate, sliding block 325 moves horizontally along slide rail 321, camera 31 is fixed on sliding block 325 through sliding block connecting plate 326, and realizes left and right sliding detection under the driving of sliding block 325.

[0038] The servo lifter 33 includes a guide rod 331, an RV reducer 332, a push rod sleeve 333, a third servo motor 334, a second screw rod 335, and an anti-rotation clamp 336. The RV reducer 332 converts the high-speed rotation of the third servo motor 334 into low-speed high-torque output, and drives the push rod sleeve 333 to ascend and descend along the guide rod 331 under the drive of the second screw rod 335. The camera 31 is fixed on the push rod sleeve 333 through a camera fixing ring 337, and realizes up and down sliding detection under the drive of the push rod sleeve 333. The anti-rotation clamp 336 is used to prevent the push rod sleeve 333 from rotating, and to ensure the vertical motion accuracy.

[0039] In this embodiment, three industrial cameras 31 are arranged for product appearance detection. The first camera 311 and the second camera 312 are arranged on opposite sides of the product respectively, and realize horizontal movement detection through the drive of the servo sliding table 32. The third camera 313 is arranged above the product, and realizes vertical movement detection through the drive of the servo lifter 33. The three industrial cameras cooperate to realize product appearance detection.

[0040] Four, the operation platform 4: including human-computer interaction interface 41, PLC controller and electric control box 42; the PLC controller is integrated in the electric control box 42, and each actuator is controlled through bus protocol (such as EtherCAT). The man-machine interface 41 is arranged on the outer surface of the electric control box 42, which is used for setting the sorting parameters (such as weight threshold, detection sensitivity) and the driving control of each electrical element; the PLC controller receives the position data of the photoelectric sensor 215 in real time, triggers the weighing and visual detection action; and receives the weighing and image data of the product, and triggers the sorting action. The electric control box 42 is connected with the rack 1 through the cantilever support 13, and the cantilever support 13 can be connected with the rack 1 through the right-angle bending piece 131, supporting the multi-angle adjustment of the operation platform 4. The PLC controller is connected with each servo motor and the weighing module 22 through a shielded cable.

[0041] In order to improve the accuracy of visual detection, the weighing visual detection sorting machine can be further provided with:

[0042] Five, the light source module 5: it is used for providing uniform illumination, eliminating the reflection interference of the product surface, and improving the accuracy of visual detection. The light source module 5 can include four long strip-shaped LED lamp strips 51, a light source fixing plate 52, and a delayed protection strip. The LED lamp strip 51 is installed around the rack 1 through the light source fixing plate 52 and bolts, and is arranged around the weighing conveyor 2, which is used for providing auxiliary illumination for visual detection. The LED lamp strip 51 is connected with the light source controller through an aviation plug, the brightness thereof is adjusted through a PWM signal, the color temperature range is 3000K-6500K, and the delayed protection strip is used for preventing dust from entering the inside of the LED lamp strip 51.

[0043] Six, sorting actuator: including pneumatic push rod, electromagnetic valve group and reject baffle, pneumatic push rod is installed at the end of the weighing conveyor 2 through the support, electromagnetic valve group is connected with air source through air pipe; Pneumatic push rod is triggered by PLC controller, and unqualified products are pushed away from the conveying line. When detecting unqualified products, the PLC controller sends a signal to the electromagnetic valve group to drive the pneumatic push rod to act, and the reject baffle guides the unqualified products into the recycling channel.

[0044] The weighing visual detection sorting machine of the embodiment of the application has the following working principle:

[0045] 1. Conveying and weighing: the products are conveyed by the conveying belt 21, and the photoelectric sensor 215 detects the products to trigger the weighing and visual detection action, and the weighing module 22 records the product weight data in real time;

[0046] 2. Visual detection: the servo sliding table 32 and the servo elevator 33 drive the camera 31 to move to shoot the multi-angle images of the products;

[0047] 3. Data processing: the operation platform 4 compares the weight and image data to determine whether the products are qualified;

[0048] 4. Sorting execution: the sorting mechanism rejects unqualified products according to the instruction, and qualified products continue to be conveyed to the next process.

[0049] The application scenarios of the embodiment of the application include but are not limited to:

[0050] Food industry: detecting the sealing property of a pop-top can and the liquid filling amount;

[0051] Pharmaceutical industry: checking the label integrity of a medicine bottle and the tablet defect;

[0052] Electronic industry: sorting products with appearance defects or size out-of-tolerance of batteries.

[0053] The above-mentioned embodiments can be adjusted according to actual needs, and all alternative solutions fall within the protection scope of the present application.

[0054] In the description of the present specification, the description of the terms "some embodiments", "some examples", "exemplarily", "example", "preferably", or "further" means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A weighing visual inspection and sorting machine, characterized in that, include: The rack (1) is used to support the various functional modules; A weighing conveyor (2) is installed on a frame (1) and includes a conveying module (21), a weighing module (22), and a weighing frame (23). The conveying module (21) is arranged on the weighing frame (23) and driven by a first servo motor (212) for conveying the product to be inspected. The weighing module (22) is arranged below the weighing frame (23) for weighing in real time during the conveying process. The visual inspection system (3) includes a camera (31), a servo slide (32) and a servo lift (33). The servo slide (32) drives the camera (31) to move in the horizontal direction, and the servo lift (33) drives the camera (31) in the vertical direction, so as to realize multi-angle and multi-directional visual inspection of the product. The operating platform (4) is used to control the coordinated operation of the weighing conveyor (2), the servo slide (32) and the servo elevator (33).

2. The weighing visual inspection and sorting machine according to claim 1, characterized in that, Further includes: A light source module (5) is mounted on the rack (1) and is used to provide auxiliary lighting for visual inspection.

3. The weighing visual inspection and sorting machine according to claim 1, characterized in that, The servo slide (32) includes a slide rail (321), a first lead screw (322), a second servo motor (323), and a sliding block (325). The slide rail (321) is arranged parallel to the first lead screw (322). The sliding block (325) drives the first lead screw (322) to rotate through a coupling (324) to achieve the horizontal displacement of the camera (31).

4. The weighing visual inspection and sorting machine according to claim 1, characterized in that, The servo lift (33) includes a guide rod (331), a third servo motor (334), a second lead screw (335), a reducer (332), and a push rod sleeve (333). The push rod sleeve (333) is connected to the second lead screw (335) and the camera (31). The third servo motor (334) drives the second lead screw (335) to rotate through the reducer (332), pushing the push rod sleeve (333) to rise and fall along the guide rod (331) to achieve the vertical displacement of the camera (31).

5. The weighing visual inspection and sorting machine according to claim 1, characterized in that, The camera (31) of the vision inspection system (3) is an industrial CCD camera or a CMOS camera, and the camera (31) is equipped with an interchangeable lens with a focal length range of 20mm to 200mm.

6. The weighing visual inspection and sorting machine according to claim 2, characterized in that, The light source module (5) includes multiple long LED light strips (51), which are arranged around the weighing conveyor (2), and the brightness and color temperature of the light source can be adjusted by the operating platform (4).

7. The weighing visual inspection and sorting machine according to claim 1, characterized in that, The operating platform (4) includes a human-machine interface (41) and a PLC controller (42). The human-machine interface (41) is used to set sorting parameters. The PLC controller (42) communicates with the first servo motor (212), the second servo motor (323), the third servo motor (334) and the weighing module (22) via a bus protocol.

8. The weighing visual inspection and sorting machine according to claim 1, characterized in that, The frame (1) is a modular design, including a conveyor box (11), an electrical box (12) and a cantilever bracket (13). The weighing conveyor (2) and the vision inspection system (3) are arranged in the conveyor box (11). The control host (34) of the camera (31) is arranged in the electrical box (12). The conveyor box (11) and the electrical box (12) are respectively provided with openable operating doors. The cantilever bracket (13) is used to connect the operating platform (4). All components are connected by bolts or buckles.

9. The weighing visual inspection and sorting machine according to claim 1, characterized in that, It also includes a sorting execution mechanism, which is a pneumatic pusher or a robotic arm, installed at the end of the weighing conveyor (2), and used to remove unqualified products based on the test results.

10. The weighing visual inspection and sorting machine according to any one of claims 1-9, characterized in that, The sorting machine is suitable for quality inspection and sorting of canned, bottled food or small packaged products.

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