A high-speed detection label changing equipment label rejecting automatic compensation mechanism and a compensation method

Abstract

The application relates to the technical field of detecting and replacing labels, and particularly relates to a high-speed detecting and replacing label equipment label rejecting automatic compensation mechanism and a compensation method. The application provides a passive tension compensation scheme based on a lever transmission principle, a lever structure with a specific proportion is connected between a label rejecting sliding piece and a tension compensation guide roller, the lever moment balance characteristic is utilized, and synchronous linkage of label rejecting action and tension compensation is realized; specifically, when the sliding piece moves downward to reject a label, the movable guide roller is automatically driven to move upward by an equal distance through a lever transmission structure composed of a first swing rod and a second swing rod, so that the paper path length is actively changed, and the tension change caused by label rejection is compensated.

Description

Technical Field

[0001] This application relates to the technical field of testing and label-changing equipment, and in particular to an automatic compensation mechanism and compensation method for label rejection in high-speed testing and label-changing equipment. Background Technology

[0002] In the process of determining defective products, a combination of RFID tags and CCD cameras is typically used for comprehensive tag evaluation. RFID tags, or Radio Frequency Identification (RFID) technology, also known as electronic tags or wireless radio frequency identification, are a communication technology that uses radio signals to identify specific targets and read / write related data. Through a detection antenna, chip information can be read, and the content of the read tag information and signal strength are compared and judged (e.g., duplicate EPC numbers, missing TID numbers, RSSI signal values ​​below a set value, etc.) to determine defective products. Simultaneously, the CCD camera, using Optical Character Recognition (OCR) technology, can read the barcode or QR code on the RFID tag, calculate the offset position based on preset reference points, intelligently analyze stains, and determine whether the appearance pattern is acceptable.

[0003] With the widespread application of RFID technology in logistics, retail, warehousing and other fields, the quality requirements for RFID tags are becoming increasingly stringent. In the RFID tag inspection process, quickly and accurately detecting defective tags and replacing them is crucial to ensuring product quality.

[0004] Existing inspection equipment with automatic rejection mechanisms typically requires reducing the unwinding speed to reject defective labels. However, because the rejection action causes paper path deformation, current inspection and label-changing mechanisms usually compensate by electrically controlling the tension of a rotating shaft. However, different label sizes require different compensation algorithms, and the compensation calculations are subject to delays. Especially when multiple defective products are detected consecutively, the compensation algorithm needs constant adjustment, which is prone to calculation errors, affecting the accuracy of rejection and the efficiency of the equipment. This situation requires further improvement. Summary of the Invention

[0005] To address the problem that existing label-replacing mechanisms rely on electrically controlled rotating shaft tension for compensation, which affects the accuracy of label rejection and the equipment's working efficiency, this application provides an automatic label rejection compensation mechanism and method for a high-speed label-replacing equipment, employing the following technical solution:

[0006] In a first aspect, this application provides an automatic compensation mechanism for label rejection in a high-speed label-changing detection and replacement device, comprising:

[0007] The label removal structure includes a fixing component and a sliding component. The sliding component and the fixing component are displaced and cooperate to cause different deformations in the backing paper and the label to achieve label removal.

[0008] The tension compensation structure includes a movable guide roller, which is arranged along the label conveying direction. The movable guide roller changes the label paper path to maintain the stability of the paper path tension.

[0009] The lever transmission structure includes a first swing arm and a second swing arm that are hinged to each other. The other end of the first swing arm is hinged to the sliding member, and the other end of the second swing arm is hinged to the movable guide roller. The first swing arm and the second swing arm constitute a lever balance structure, which is used to link the displacement of the sliding member with the tension compensation structure to realize automatic tension compensation of the label paper path.

[0010] By adopting the above technical solution, this application proposes a passive tension compensation scheme based on the lever transmission principle. By connecting the label-removing slider and the tension compensation guide roller with a lever structure of a specific ratio, the synchronous linkage between the label-removing action and tension compensation is achieved by utilizing the torque balance characteristics of the lever. Specifically, when the slider moves downward to remove the label, the lever transmission structure composed of the first and second swing rods automatically drives the movable guide roller to move upward by an equal distance, thereby actively changing the paper path length and compensating for the tension change caused by label removal.

[0011] Optionally, the sliding member is connected to the frame via a first slide rail, and the movable guide roller is connected to the frame via a second slide rail, which is used to define the displacement direction of the sliding member and the movable guide roller.

[0012] By adopting the above technical solution, this application improves the movement mode of the label-removing slider and the movable guide roller. Since the slider and guide roller need to perform precise reciprocating motion during label removal and tension compensation, if connected only by a hinge, they are easily affected by lateral forces, causing wobbling and deviation from the movement trajectory. This application strictly restricts the movement of the slider and the movable guide roller within their respective slide rails by setting a first slide rail and a second slide rail on the frame. Specifically, the first slide rail is set along the label removal direction, ensuring that the slider can only move up and down to remove labels. The second slide rail is set parallel to the first slide rail, ensuring that the movable guide roller always maintains a vertical posture during tension compensation. This not only eliminates lateral interference forces but also ensures movement accuracy through the slide rails. Furthermore, the guiding effect of the slide rails reduces wear on the hinge bearings.

[0013] Optionally, the second rocker arm is hinged to the frame via a fixed shaft to form a support point for the lever transmission structure. The hinge points of the first rocker arm and the sliding member and the second rocker arm and the movable guide roller are located on both sides of the fixed shaft and are equidistant from the fixed shaft, so that the downward displacement of the sliding member is equal to the upward compensation of the movable guide roller.

[0014] By adopting the above technical solution, this application designs an equal-arm lever structure. By setting the fixed shaft of the second swing arm as the fulcrum, and making the hinge points of the first swing arm and the sliding member and the second swing arm and the movable guide roller equidistant on both sides of the fixed shaft, when the sliding member moves down, the movable guide roller will automatically move up an equal distance due to the characteristics of this equal-arm lever, thus maintaining a precise compensation ratio at any position. Precise tension compensation can be achieved without complex transmission ratio calculation and adjustment.

[0015] Optionally, the tension compensation structure further includes a first fixed guide roller and a second fixed guide roller. The first fixed guide roller is disposed at the front end of the paper path, and the second fixed guide roller is disposed at the rear end of the paper path. The movable guide roller is disposed between the first fixed guide roller and the second fixed guide roller, hinged to the second rocker arm and used for tension compensation. The first fixed guide roller, the movable guide roller and the second fixed guide roller together form an S-shaped paper path.

[0016] By adopting the above technical solution, this application sets a first fixed guide roller at the front end of the paper path, a second fixed guide roller at the rear end of the paper path, and sets a movable guide roller in the middle position; thus, the label paper path forms an S-shaped direction, which not only increases the wrapping angle between the paper tape and the guide roller, but also evenly distributes the tension throughout the entire paper path.

[0017] Optionally, the sliding member includes a semi-circular label-removing shaft and a fixed base. In a static state, the semi-circular label-removing shaft cooperates with the fixed base to form a circular label-removing shaft. When the sliding member moves down, a turning angle for label removal is formed between the sliding member and the fixed base, so that the backing paper adheres to the turning angle under tension and the label remains straight, thereby achieving label removal.

[0018] By adopting the above technical solution, when label removal is required, the semi-circular label moves downward and forms a dynamically adjustable turning angle with the fixing component. The backing paper naturally conforms to this turning angle under tension, while the harder label remains in a straight motion, thereby achieving precise label removal. This utilizes the principle of material rigidity difference, which not only protects the integrity of the backing paper but also improves label removal efficiency.

[0019] Secondly, this application provides a control method for an automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment, applied to the aforementioned automatic compensation mechanism, comprising the following steps:

[0020] Detect the label location information and determine whether it is a defective label based on the label location information;

[0021] When a defective label is detected, the slider is controlled to move downwards a preset distance, so that a preset turning angle is formed between the slider and the fixed part;

[0022] The paper tension value is monitored in real time. When the paper tension value exceeds the preset range, the displacement distance of the slider is adjusted until the paper tension value returns to the preset range.

[0023] By adopting the above technical solution, this application provides a control method for the automatic compensation mechanism of the label rejection device in a high-speed inspection and label changing equipment. Due to differences in process parameters such as label material, size, and speed, fixed label rejection parameters are often difficult to adapt to various working conditions, especially when tension fluctuates greatly. Too large or too small turning angles will affect the label rejection effect. This application first uses sensors to detect label position information in real time and judge defective labels. Then, it controls the slider to move down a preset distance to form an initial turning angle. At the same time, it monitors the paper tension value in real time. When the tension value exceeds the preset range, the system will automatically fine-tune the displacement of the slider until the tension returns to a reasonable range. By combining mechanical compensation with intelligent control and making dynamic adjustments through real-time feedback, the label rejection process can adapt to different working conditions.

[0024] Optionally, before detecting the label location information, the method further includes the following steps:

[0025] Obtain label specification information and equipment operating status information;

[0026] The label specification information and equipment operating status information are input into a preset sliding component displacement model to determine the initial value of the preset distance and the initial interval of the preset range.

[0027] By adopting the above technical solution, this application optimizes the parameter initialization process of the label rejection control method. Since different specifications of labels vary in material, size, and flexibility, relying solely on real-time feedback for adjustment often requires multiple trials to find suitable label rejection parameters. This not only reduces changeover efficiency but also results in significant material waste. This application first obtains the label specification information and equipment operating status information, then inputs this information into a pre-established sliding component displacement model. The model calculates the optimal initial value of the preset distance and the initial interval of the preset range, thus achieving intelligent preset of label rejection parameters and greatly reducing manual debugging time.

[0028] Optionally, the method may also include the following steps:

[0029] Query the equipment operation and maintenance database to obtain historical rejection parameters;

[0030] Based on the historical rejection parameters, adjust the initial value of the preset distance;

[0031] The rejection control is based on the adjusted preset distance.

[0032] By adopting the above technical solution, since theoretical models cannot fully consider all influencing factors in actual production, such as environmental humidity, material aging, and equipment wear, the initial parameters calculated solely by the model may deviate from the optimal working state. Before implementing rejection control, this application first queries the operation and maintenance database to obtain historical rejection parameters under similar working conditions, then corrects the initial value of the preset distance predicted by the model based on the historical parameters, and finally uses the optimized parameters for rejection control. This transforms the actual operating experience of the equipment into a quantifiable optimization basis, realizing an organic combination of theoretical calculation and practical experience.

[0033] Optionally, based on the historical rejection parameters, the initial value of the preset distance is adjusted, specifically including the following steps:

[0034] Based on the historical rejection parameters, obtain historical preset distance and historical tension data;

[0035] Compare the current preset distance with the historical preset distance, and mark the label specifications with similar comparison results as similar specifications;

[0036] Based on the historical tension data of similar specifications, adjust the corresponding initial value of the preset distance.

[0037] By adopting the above technical solution, the production line needs to optimize parameters separately when processing labels with similar thickness but different sizes, resulting in excessive changeover preparation time. This application first extracts preset distance and tension data from the historical database, then identifies label specifications with similar preset distances through comparative analysis and marks them as similar specifications, and finally optimizes the initial value of the preset distance of the current specification based on the historical tension performance of these similar specifications. By utilizing the similarity characteristics between specifications and establishing a parameter association network, experience can be transferred across specifications, thus improving the efficiency of experience reuse.

[0038] Optionally, the method may also include the following steps:

[0039] Real-time acquisition of label feed speed and paper tension data;

[0040] Time-series analysis was performed on the label conveying speed and paper tension data to obtain the changing trends;

[0041] The changing trend is matched with a preset abnormal feature library. When an abnormal feature is matched, the pre-adjustment displacement of the slider is calculated according to the adjustment strategy corresponding to the abnormal feature.

[0042] The slider is controlled to move according to the pre-adjusted displacement.

[0043] By adopting the above technical solution, since speed and tension fluctuations in the production process often have certain regularities, if adjustments are only made when the tension exceeds the preset range, it may lead to fluctuations in label rejection quality or even equipment failure. The system of this application collects label conveying speed and paper tension data in real time, performs time-series analysis on these data to obtain the changing trends, matches the trend characteristics with a pre-established abnormal feature library, and once a matching abnormal feature is found, immediately calculates the pre-adjustment amount according to the corresponding adjustment strategy and controls the sliding parts to adjust to the correct position in advance. By predicting trends and intervening in advance, the label rejection process is stabilized, and the problem of lag in traditional feedback control is solved.

[0044] In summary, this application includes at least one of the following beneficial technical effects:

[0045] 1. This application proposes a passive tension compensation scheme based on the lever transmission principle. By connecting the label-removing slider and the tension compensation guide roller with a lever structure of a specific ratio, the synchronous linkage between the label-removing action and tension compensation is achieved by utilizing the torque balance characteristics of the lever. Specifically, when the slider moves downward to remove the label, the movable guide roller is automatically driven to move upward by an equal distance through the lever transmission structure composed of the first and second swing rods, thereby actively changing the paper path length and compensating for the tension change caused by label removal.

[0046] 2. This application provides a control method for an automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment. Due to differences in process parameters such as label material, size, and speed, fixed rejection parameters are often difficult to adapt to various working conditions, especially when tension fluctuates greatly. Excessive or insufficient turning angles can affect the rejection effect. This application first uses sensors to detect label position information in real time and identify defective labels. Then, it controls the sliding part to move down a preset distance to form an initial turning angle. At the same time, it monitors the paper tension value in real time. When the tension value exceeds the preset range, the system automatically fine-tunes the displacement of the sliding part until the tension returns to a reasonable range. By combining mechanical compensation with intelligent control and making dynamic adjustments through real-time feedback, the rejection process can adapt to different working conditions.

[0047] 3. This application optimizes the parameter initialization process of the label rejection control method. Due to the differences in material, size, and flexibility of labels of different specifications, relying solely on real-time feedback for adjustment often requires multiple trials to find suitable label rejection parameters. This not only reduces changeover efficiency but also causes a large amount of material waste. This application first obtains the label specification information and equipment operating status information, and then inputs this information into a pre-established sliding component displacement model. The optimal initial value of the preset distance and the initial interval of the preset range are calculated through the model. This achieves intelligent preset of label rejection parameters, greatly reducing manual debugging time. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the structure of the high-speed detection and label-changing equipment according to an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of the automatic compensation mechanism for rejecting marks in an embodiment of this application;

[0050] Figure 3 This is a cross-sectional schematic diagram of the automatic compensation mechanism for rejecting marks according to an embodiment of this application;

[0051] Figure 4 This is a schematic diagram of the paper path layout in an embodiment of this application;

[0052] Figure 5 This is a flowchart illustrating a control method for an automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing device according to an embodiment of this application.

[0053] Figure 6 This is a flowchart illustrating the process of determining the initial interval in the control method of an automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment according to an embodiment of this application.

[0054] Figure 7 This is a flowchart illustrating the adjustment of initial values ​​in the control method of an automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment according to an embodiment of this application.

[0055] Figure 8 This is a flowchart illustrating step S720 in the control method of an automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment according to an embodiment of this application.

[0056] Figure 9 This is a schematic diagram of the pre-adjustment process in the control method of the automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment according to an embodiment of this application;

[0057] Explanation of reference numerals in the attached drawings: 1. Unwinding mechanism; 2. First winding mechanism; 3. Main drive device; 4. First detection platform; 5. Labeling head device; 6. Labeling head adjustment mechanism; 7. Automatic label rejection compensation mechanism; 8. Second detection platform; 9. Second winding mechanism; 71. Label rejection structure; 72. Tension compensation structure; 73. Lever transmission structure; 711. Fixing component; 712. Sliding component; 713. Waste collection box; 721. Movable guide roller; 722. First fixed guide roller; 723. Second fixed guide roller; 731. First swing arm; 732. Second swing arm; 733. First slide rail; 734. Fixed shaft; 735. Connecting piece; 736. Second slide rail; 7121. Semi-circular label rejection shaft; 7122. Fixed base. Detailed Implementation

[0058] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to any or all possible combinations including one or more of the listed items.

[0059] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0060] The embodiments of this application will now be described in further detail with reference to the accompanying drawings.

[0061] Firstly, this application provides an automatic compensation mechanism for label rejection in a high-speed inspection and label-changing device, which is applied in such a device. Figure 1As shown, the high-speed inspection and label-changing equipment includes an unwinding mechanism 1, a first winding mechanism 2, a main drive unit 3, a first inspection platform 4, a label-applying head device 5, a label-adjusting mechanism 6, an automatic label-rejection compensation mechanism 7, a second inspection platform 8, and a second winding mechanism 9. It can be understood that the first inspection platform 4 and the second inspection platform 8 include an RFID detection module and a CCD camera detection module, used to comprehensively inspect the labels from different dimensions. The RFID detection module uses Radio Frequency Identification (RFID) technology, also known as electronic tags or wireless RFID technology, to read the label chip information using a detection antenna and analyze the label information content and signal strength (such as duplicate EPC numbers, missing TID numbers, RSSI signal values ​​below a set value, etc.) to determine whether the label is defective. The CCD camera detection module uses Optical Character Recognition (OCR) technology to read the label barcode or QR code information and calculates the offset position based on preset reference points, while intelligently analyzing whether the stains and appearance patterns on the label surface are acceptable.

[0062] The labels to be inspected are released by the unwinding mechanism 1, and the first winding mechanism 2 winds them up. Controlled by the main drive device 3, the labels are conveyed to the first inspection platform 4 for inspection, where a FIFO queue marking system is used to mark defective products. After inspection, the labels pass through the labeling head device 5, where the labeling head adjustment mechanism 6, in conjunction with the automatic label rejection compensation mechanism 7, removes the defective labels and simultaneously replenishes them with new labels. The relabeled labels undergo re-inspection on the second inspection platform 8 to ensure the quality of the labeling process. Finally, qualified labels are wound up by the second winding mechanism 9. The entire inspection and labeling process requires precise coordination among all mechanisms to ensure accuracy during high-speed operation.

[0063] Reference Figure 2 and Figure 3 The automatic label rejection compensation mechanism 7 includes a label rejection structure 71, a tension compensation structure 72, and a lever transmission structure 73. The label rejection structure 71 includes a fixed member 711 and a sliding member 712, with the sliding member 712 displaced in coordination with the fixed member 711. The tension compensation structure 72 includes a movable guide roller 721, which is arranged along the label conveying direction and changes the label paper path. The lever transmission structure 73 includes a first swing rod 731 and a second swing rod 732 that are hinged to each other. The other end of the first swing rod 731 is hinged to the sliding member 712, and the other end of the second swing rod 732 is hinged to the movable guide roller 721. The first swing rod 731 and the second swing rod 732 constitute a lever balance structure.

[0064] Specifically, the sliding member 712 includes a semi-circular label-removing shaft 7121 and a fixed base 7122. In a static state, the semi-circular label-removing shaft 7121 cooperates with the fixed member 711 to form a circular label-removing shaft. When the servo motor controls the sliding member 712 to move downward, a turning angle for label removal is formed between the sliding member 712 and the fixed shaft 7124, so that the backing paper adheres to the turning angle with tension and the label remains straight, thereby realizing label removal. The fixed base 7122 is connected to the frame through a first slide rail 733, and a first swing rod 731 is hinged on the fixed base 7122. The first slide rail 733 limits the vertical displacement of the sliding member 712 and the first swing rod 731. The second swing arm 732 is hinged to the frame via a fixed shaft 734, forming the support point of the lever transmission structure 73. The hinge points of the first swing arm 731 and the sliding member 712, and the second swing arm 732 and the movable guide roller 721, are located on opposite sides of the fixed shaft 734, and are equidistant from the fixed shaft 734, ensuring that the downward displacement of the sliding member 712 is equal to the upward compensation of the movable guide roller 721. When the first swing arm 731 moves up and down, one end of the second swing arm 732 rotates around the fixed shaft 734 under the drive of the first swing arm 731, thereby driving the other end to move up and down. The other end of the second swing arm 732 is movably connected to a connecting piece 735, and the movable guide roller 721 is fixedly connected to the connecting piece 735. The connecting piece 735 is connected to the frame via a second slide rail 736, thereby limiting the displacement direction of the movable guide roller 721. When the slider 712 moves down, the connecting piece 735 will drive the movable guide roller 721 to move up an equal distance automatically due to the equal-arm lever characteristic of the second rocker arm 732.

[0065] Reference Figure 4 The tension compensation structure 72 also includes a first fixed guide roller 722 and a second fixed guide roller 723. The first fixed guide roller 722 is located at the front end of the paper path, and the second fixed guide roller 723 is located at the rear end of the paper path. A movable guide roller 721 is located between the first fixed guide roller 722 and the second fixed guide roller 723, hinged to the second rocker arm 732, and used for tension compensation. The first fixed guide roller 722, the movable guide roller 721, and the second fixed guide roller 723 together form an S-shaped paper path. Figure 4 As shown, the arrows indicate the paper path direction. The label passes under the second fixed guide roller 723, then over the movable guide roller 721, and under the first fixed guide roller 722, before reaching the label rejection structure 71. The label is rejected by the label rejection structure 71 and enters the waste collection box 713 for collection. As can be seen from the figure, when the sliding member 712 moves downward, the lever transmission structure 73 drives the movable guide roller 721 to move upward, lengthening the paper path through which the label passes, thereby increasing the tension and achieving tension compensation.

[0066] Secondly, this application provides a control method for an automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment. The control method of the automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment described in this application will be described below in conjunction with the aforementioned automatic compensation mechanism for rejecting labels in a high-speed inspection and label-changing equipment.

[0067] Reference Figure 5 A control method for an automatic compensation mechanism for rejecting labels in a high-speed label-changing device includes the following steps:

[0068] S510. Detect the label location information and determine whether it is a defective label based on the label location information.

[0069] In this embodiment, label position information refers to the positional status information of the label to be inspected during high-speed movement. Defective labels refer to labels with quality defects discovered during the inspection process. Quality defects include label misalignment, label damage, bubbles, wrinkles, printing defects, material defects, dimensional deviations, uneven edges, adhesive residue, and surface scratches, etc.

[0070] Specifically, different labeled products correspond to different quality requirements. In this embodiment, the label to be inspected is a pharmaceutical packaging label. Obtaining label position information involves using detection devices such as photoelectric sensors, CCD cameras, and displacement sensors on the first detection platform to collect real-time position data of the label during transport. From this data, label quality-related status information is extracted to obtain label position information. This label position information includes the label's center position, edge contour, surface features, and displacement parameters. It is important to note that label position information is not simply spatial coordinate information; rather, it represents the overall motion state of the label during high-speed transport. This position information is updated in real time whenever a new label is detected.

[0071] Furthermore, if label quality is related to equipment operating parameters, such as the conveying speed of the main drive unit or the tension value of the tension compensation structure, these operating parameters will also be included as control parameters that need to be monitored. When a defective label is detected, in addition to performing a label rejection operation, the system will also adaptively adjust the relevant operating parameters to prevent similar quality problems from occurring in subsequent labels. The system has three preset quality judgment standards: the first level is for obvious defects (such as damage, missing parts, etc.); the second level is for positional deviation, which measures the edge offset through displacement sensors, and a deviation exceeding ±0.3mm is judged as a defective product; the third level is for surface quality, which is judged comprehensively by combining multiple detection parameters. When the system detects a defective label and triggers the label rejection mechanism, the control system will monitor the change in paper tension value in real time. By setting tension sensors at key locations, a tension-displacement correspondence table is established to guide the displacement adjustment of the sliding parts.

[0072] S520. When a defective label is detected, the slider is controlled to move downwards a preset distance, so that a preset turning angle is formed between the slider and the fixed part.

[0073] In this embodiment, the preset distance refers to the displacement required for the slider to move downwards to form an effective label rejection action. The preset turning angle refers to the optimal angle value formed between the slider and the fixed member for achieving label rejection.

[0074] Specifically, based on the detection results of defective labels, the system needs to perform precise label rejection actions. The displacement and turning angle values ​​of the slider for each type of defective label must be accurately set to ensure the reliability of label rejection. For example, if the slider moves too little, the label may not be completely removed; if the movement is too large, it may cause drastic fluctuations in paper tension, affecting the stability of the equipment. Therefore, a preset label rejection parameter database contains a displacement-angle correspondence table for different operating conditions. Based on the currently detected defective label type and the corresponding process parameter requirements, the system queries the displacement-angle correspondence table in the preset label rejection parameter database to determine the slider's movement distance and turning angle value, thus obtaining the optimal label rejection execution parameters.

[0075] Furthermore, the system records the actual effect of each rejection action, including displacement accuracy, angle achievement value, rejection success rate, and other data, and updates the displacement-angle correspondence table regularly to achieve adaptive optimization.

[0076] S530: Real-time monitoring of paper tension value. When the paper tension value exceeds the preset range, adjust the displacement distance of the slider until the paper tension value returns to the preset range.

[0077] In this embodiment, the paper path tension value refers to the tension state value of the label material during the conveying process. After the label rejection action in step S520 is performed, the system will monitor the change of the paper path tension value in real time and make fine adjustments to the position of the slider when necessary.

[0078] Specifically, based on real-time monitoring data from the tension sensor, the system needs to perform precise tension compensation actions. The displacement adjustment amount of the sliding component corresponding to each tension value range should be accurately set to ensure tension stability. For example, if the compensation displacement is too small, tension fluctuations may not be effectively suppressed; if the compensation displacement is too large, it may cause over-adjustment and tension oscillations. Therefore, the system sets a reasonable range for the tension value. When the tension value exceeds this range after the tag removal action, the system will make a fine-tuning adjustment based on the initial tag removal position. This dynamic adjustment mechanism ensures the effectiveness of the tag removal action while maintaining stable system operation.

[0079] In one embodiment, refer to Figure 6Before detecting the label location information in step S510, the method further includes the following steps:

[0080] S610: Obtain label specification information and equipment operating status information.

[0081] In this embodiment, label specification information refers to the physical characteristic parameters of the label to be inspected. Equipment operating status information refers to the real-time operating parameters of the high-speed inspection and label-changing equipment.

[0082] Specifically, based on production task requirements, the label specification information of the current production batch is obtained, the complete parameter index table of the corresponding label type is matched from the preset label parameter database, and the specific parameter information of the current label is input into the parameter index table to obtain the complete specification information of the current label. In addition, based on the equipment operation status monitoring system, the real-time operating parameters of the equipment are obtained, including the main drive speed, paper path tension reference value and ambient temperature and humidity. Combined with historical operating data, the stability of the current equipment operation status is judged, and the reliability assessment result of equipment operation is obtained.

[0083] S620. Input the label specification information and equipment operating status information into the preset sliding displacement model to determine the initial value of the preset distance and the initial interval of the preset range.

[0084] Specifically, the preset sliding component displacement model includes not only a baseline correspondence table of label specification parameters but also displacement compensation coefficients for different operating states. These coefficients are correction values ​​used to convert label specifications and equipment states into displacement parameters. Different types of labels have different displacement compensation coefficients. For example, paper labels and film labels of the same size have the same material properties and equipment state requirements, but due to differences in material toughness, their corresponding displacement compensation coefficients are different. Therefore, the final determined initial value of the preset distance and the initial range of the preset range are also different. Thus, the baseline displacement value is determined by combining the preset sliding component displacement model with the label specification information, and then compensation correction is performed based on the equipment operating state information, such as a weighted calculation of the baseline displacement value and the state compensation coefficient, to obtain the initial value of the preset distance and the initial range of the preset range.

[0085] In one embodiment, refer to Figure 7 The method also includes the following steps:

[0086] S710: Query the equipment operation and maintenance database to obtain historical rejection parameters.

[0087] In this embodiment, historical rejection parameters refer to rejection control data recorded by the equipment during previous operation. The equipment operation and maintenance database stores key operating parameters including preset distance, actual displacement, rejection success rate, and tension fluctuation.

[0088] Specifically, the system uses the label specifications (such as material and size) and equipment operating status (such as operating speed and environmental conditions) of the current production task to filter historical rejection parameters under the same or similar conditions within the past month from the equipment operation and maintenance database. These parameters include preset distance values ​​for different time periods and their corresponding rejection effect data.

[0089] S720: Adjust the initial value of the preset distance based on historical rejection parameters.

[0090] In this embodiment, the system calculates the optimal preset distance value by analyzing the correspondence between the preset distance and the rejection effect in the historical rejection parameters.

[0091] Specifically, the optimization model mainly considers the rejection success rate, tension fluctuation range, and equipment stability. For example, if historical data shows that under specific operating conditions, a preset distance of 2.3mm yields the best overall results (rejection success rate of 98%, tension fluctuation less than 0.2N), the system will adjust the current initial value of the preset distance to 2.3mm. If historical data shows a correlation between the preset distance and runtime, the system will also make compensation adjustments based on the current equipment runtime.

[0092] S730 performs label rejection control based on the adjusted preset distance.

[0093] In this embodiment, the adjusted preset distance is used as a new control parameter, and the system simultaneously starts a parameter verification mechanism to monitor the rejection effect.

[0094] In one embodiment, refer to Figure 8 In step S720, the initial value of the preset distance is adjusted based on the historical rejection parameters, specifically including the following steps:

[0095] S721. Based on historical rejection parameters, obtain historical preset distance and historical tension data.

[0096] In this embodiment, the historical preset distance refers to the sliding displacement setting value during each historical rejection control operation. Historical tension data refers to the corresponding paper path tension acquisition data and tension control index data.

[0097] Specifically, each time the label rejection control was performed in the past, a preset distance was set and the tension was monitored. Therefore, the preset distance data, tension monitoring data and corresponding control index data for each label rejection control in the past were extracted from the historical label rejection parameters, which is the historical tension data.

[0098] S722. Compare the current preset distance with the historical preset distance, and mark the label specifications with similar comparison results as similar specifications.

[0099] In this embodiment, similar specifications refer to label specifications where the deviation between the current preset distance and the historical preset distance is within the allowable range.

[0100] Specifically, the historical preset distance corresponding to each label specification is compared with the currently calculated preset distance, that is, the current preset distance and the historical preset distance are compared. Label specifications with a deviation of ±10% in the comparison result are marked as similar specifications, that is, label specifications with similar current preset distance and historical preset distance.

[0101] S723. Adjust the corresponding initial value of the preset distance based on historical tension data of similar specifications.

[0102] Specifically, "similar specifications" means that the preset distance benchmark values ​​corresponding to the label specifications are close. However, due to the cumulative operating time of the equipment, the mechanical characteristics may change to some extent. Therefore, the corresponding control parameters and control indicators should be dynamically adjusted, and the rejection control indicator is determined by the preset distance. Thus, historical tension data of similar specifications is analyzed to determine the changing trend of the historical tension data, thereby analyzing the optimization direction of the current rejection control. In this embodiment, the analysis of historical tension data of similar specifications can be performed using a machine learning model. This model learns the parameter performance of a large number of corresponding similar specifications during normal operation and the correlation between each parameter. Based on the correlation between each parameter, it predicts the current optimal preset distance for the similar specifications and determines whether the current preset distance is within the optimal range. For example, when the tension fluctuation of a batch of labels exceeds ±0.2N, the preset distance value is optimized by analyzing historical tension data. Based on this, an updated preset distance is generated through the analysis of historical tension data of similar specifications, and the initial value of the preset distance for the corresponding label specifications is adjusted based on the updated preset distance.

[0103] In one embodiment, refer to Figure 9 The method also includes the following steps:

[0104] S910: Real-time acquisition of label feed speed and paper tension data.

[0105] In this embodiment, the label conveying speed refers to the real-time conveying speed of the labels in the transport channel. Paper tension data refers to the real-time data collected by tension sensors during the label conveying process.

[0106] Specifically, the system uses speed sensors and tension sensors distributed at key locations in the conveying channel to collect speed and tension data in real time during the label conveying process with a sampling period of 10ms. The speed sensors collect the rotational speed information of the main drive wheel and the driven wheel, and calculate the actual conveying speed of the label; the tension sensors collect the real-time tension value at the tension control point and record the tension fluctuation.

[0107] S920: Perform time-series analysis on label conveying speed and paper tension data to obtain the changing trend.

[0108] In this embodiment, the time series analysis primarily focuses on the patterns and correlations in the variation of velocity and tension data. These trends include the amplitude of data fluctuations, periodic changes, and abrupt changes.

[0109] Specifically, the system uses a sliding window method to process continuously acquired data, calculating the rate of change, fluctuation range, and trend characteristics of velocity and tension. For example, when the system detects a tension value fluctuation exceeding 0.5N within one second, or a velocity fluctuation exceeding ±3%, it marks this trend as a potential anomaly. Simultaneously, the system analyzes the phase relationship between velocity and tension changes, identifying correlation patterns between the two.

[0110] S930. Match the changing trend with the preset abnormal feature library. When an abnormal feature is matched, calculate the pre-adjustment displacement of the sliding component according to the adjustment strategy corresponding to the abnormal feature.

[0111] In this embodiment, the anomaly feature library stores various typical anomaly patterns and their corresponding handling strategies. The pre-adjustment displacement refers to the preventative adjustment of the slider position before an anomaly occurs.

[0112] Specifically, the system compares the identified trends with feature templates in the anomaly feature library. For example, when a trend of "continuously increasing tension and increased speed fluctuations" is detected, the system matches it with the "label adhesion precursor" feature in the feature library. If the match is successful, the system calculates the required displacement of the sliding component based on the adjustment strategy corresponding to the anomaly feature and the current operating parameters. The adjustment strategy considers factors such as the severity of the anomaly, its development speed, and the current operating conditions, and generates the pre-adjustment displacement through a preset compensation algorithm.

[0113] S940, control the sliding component to move according to the pre-adjusted displacement.

[0114] In this embodiment, the system performs preventative adjustments by precisely controlling the position of the slider to anticipate potential anomalies.

[0115] Specifically, the system converts the calculated pre-adjustment displacement into control commands for the sliding component drive motor, and performs displacement adjustment using a segmented acceleration and deceleration method. During the adjustment process, changes in speed and tension are continuously monitored to verify the adjustment effect. If the adjusted parameters tend to stabilize, the preventative adjustment is complete; if the abnormal trend continues to develop, the system will reassess the adjustment strategy and execute new adjustment actions until the system returns to a stable operating state.

[0116] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic compensation mechanism for rejecting labels in a high-speed label-changing and inspection device, characterized in that, include: The label removal structure (71) includes a fixing member (711) and a sliding member (712). The sliding member (712) and the fixing member (711) are displaced and cooperate to make the backing paper and the label deform differently to achieve label removal. The tension compensation structure (72) includes a movable guide roller (721) which is arranged along the label conveying direction. The movable guide roller (721) changes the label paper path and maintains the stability of the paper path tension. The lever transmission structure (73) includes a first swing rod (731) and a second swing rod (732) that are hinged to each other. The other end of the first swing rod (731) is hinged to the sliding member (712), and the other end of the second swing rod (732) is hinged to the movable guide roller (721). The first swing rod (731) and the second swing rod (732) constitute a lever balance structure, which is used to link the displacement of the sliding member (712) with the tension compensation structure (72) to realize automatic tension compensation of the label paper path. The sliding member (712) is connected to the frame via a first slide rail (733), and the movable guide roller (721) is connected to the frame via a second slide rail (736), which is used to limit the displacement direction of the sliding member (712) and the movable guide roller (721); The second rocker arm (732) is hinged to the frame via a fixed shaft (734) to form the support point of the lever transmission structure (73). The hinge point between the first rocker arm (731) and the sliding member (712) and the hinge point between the second rocker arm (732) and the movable guide roller (721) are located on both sides of the fixed shaft (734) and are equidistant from the fixed shaft (734), so that the downward displacement of the sliding member (712) is equal to the upward compensation of the movable guide roller (721). The tension compensation structure (72) further includes a first fixed guide roller (722) and a second fixed guide roller (723). The first fixed guide roller (722) is disposed at the front end of the paper path, and the second fixed guide roller (723) is disposed at the rear end of the paper path. The movable guide roller (721) is disposed between the first fixed guide roller (722) and the second fixed guide roller (723), and is hinged to the second swing arm (732) for tension compensation. The first fixed guide roller (722), the movable guide roller (721), and the second fixed guide roller (723) together form an S-shaped paper path.

2. The automatic compensation mechanism for label rejection in the high-speed inspection and label-changing equipment according to claim 1, characterized in that, The sliding member (712) includes a semi-circular label-removing shaft (7121) and a fixed base (7122). When the semi-circular label-removing shaft (7121) is stationary, it cooperates with the fixed member (711) to form a circular label-removing shaft. When the sliding member (712) moves down, a turning angle for label removal is formed between the sliding member (712) and the fixed member (711), so that the backing paper adheres to the turning angle with tension and the label remains straight, thereby realizing label removal.

3. A control method for an automatic compensation mechanism for rejecting labels in a high-speed label-changing equipment, characterized in that, The automatic compensation mechanism applied to any one of claims 1-2 includes the following steps: Detect the label location information and determine whether it is a defective label based on the label location information; When a defective label is detected, the slider is controlled to move downwards a preset distance, so that a preset turning angle is formed between the slider and the fixed part; The paper tension value is monitored in real time. When the paper tension value exceeds the preset range, the displacement distance of the slider is adjusted until the paper tension value returns to the preset range.

4. The control method for the automatic compensation mechanism for rejecting labels in the high-speed inspection and label-changing equipment according to claim 3, characterized in that, Before detecting the label location information, the method also includes the following steps: Obtain label specification information and equipment operating status information; The label specification information and equipment operating status information are input into a preset sliding component displacement model to determine the initial value of the preset distance and the initial interval of the preset range.

5. The control method for the automatic compensation mechanism for rejecting labels in the high-speed inspection and label-changing equipment according to claim 4, characterized in that, The method also includes the following steps: Query the equipment operation and maintenance database to obtain historical rejection parameters; Based on the historical rejection parameters, adjust the initial value of the preset distance; The rejection control is based on the adjusted preset distance.

6. The control method for the automatic compensation mechanism for rejecting labels in the high-speed inspection and label-changing equipment according to claim 5, characterized in that, Based on the historical rejection parameters, the initial value of the preset distance is adjusted, specifically including the following steps: Based on the historical rejection parameters, obtain historical preset distance and historical tension data; Compare the current preset distance with the historical preset distance, and mark the label specifications with similar comparison results as similar specifications; Based on the historical tension data of similar specifications, adjust the corresponding initial value of the preset distance.

7. The control method for the automatic compensation mechanism for rejecting labels in the high-speed inspection and label-changing equipment according to claim 3, characterized in that, The method also includes the following steps: Real-time acquisition of label feed speed and paper tension data; Time-series analysis was performed on the label conveying speed and paper tension data to obtain the changing trends; The changing trend is matched with a preset abnormal feature library. When an abnormal feature is matched, the pre-adjustment displacement of the slider is calculated according to the adjustment strategy corresponding to the abnormal feature. The slider is controlled to move according to the pre-adjusted displacement.

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