Automatic compensation mechanism and compensation method for label picking of high-speed detection label changing equipment

Abstract

The invention relates to the technical field of detecting and label changing equipment, in particular to a high-speed detecting and label changing equipment label removing automatic compensation mechanism and compensation method. According to the passive tension compensation scheme based on the lever transmission principle, the label removing sliding piece and the tension compensation guide roller are connected through the lever structure with the specific proportion, and synchronous linkage of the label removing action and tension compensation is achieved by means of the torque balance characteristic of a lever; specifically, when the sliding piece moves downwards to reject the labels, the movable guide roller is automatically driven to move upwards by equal distance through a lever transmission structure composed of the first swing rod and the second swing rod, so that the length of a paper path is actively changed, and the tension change caused by label rejecting is compensated.

Description

Technical Field

[0001] This application relates to the technical field of label-changing equipment detection, and in particular to a label-rejecting automatic compensation mechanism and compensation method for a high-speed label-changing equipment detection device. Background Art

[0002] In the process of defective product determination, the RFID tag and CCD camera are usually combined to comprehensively determine the label. The RFID tag, that is, radio frequency identification (RFID, Radio Frequency Identification) technology, also known as an electronic tag or wireless radio frequency identification, is a communication technology that can identify specific targets through radio signals and read and write relevant data. Through the detection antenna, the chip information can be read, and the read label information content and signal strength are compared and judged (such as EPC duplicate number, TID missing number, RSSI signal value lower than the set value, etc.) to determine defective products. At the same time, the CCD camera can read the bar code or two-dimensional code on the RFID tag through optical character recognition (OCR, Optical Character Recognition) technology, calculate the offset position in combination with the preset reference point, intelligently analyze the stain, and judge whether the appearance pattern is qualified.

[0003] With the wide application of RFID technology in the fields of logistics, retail, warehousing, etc., the quality requirements for RFID tags are getting higher and higher. In the RFID tag detection link, quickly and accurately detecting defective products and completing replacement is the key to ensuring product quality.

[0004] When the existing detection equipment with an automatic rejection mechanism detects a defective label, it usually needs to reduce the unwind speed to reject the label. However, since the label-rejecting action will cause the paper path to deform, the existing label-changing detection mechanism usually compensates by electrically controlling the tension of the rotating shaft. However, different label size specifications require different compensation algorithms, and there is a delay in the compensation calculation. Especially when multiple defective products appear continuously, the compensation algorithm needs to be adjusted continuously, which is prone to calculation errors, affecting the accuracy of label rejection and the working efficiency of the equipment. This situation needs to be further improved. Summary of the Invention

[0005] In order to solve the problem that the existing label-changing detection mechanism compensates by electrically controlling the tension of the rotating shaft, which affects the accuracy of label rejection and the working efficiency of the equipment, this application provides a label-rejecting automatic compensation mechanism and compensation method for a high-speed label-changing equipment detection device, and adopts the following technical solutions: In the first aspect, this application provides a label-rejecting automatic compensation mechanism for a high-speed label-changing equipment detection device, including: The label rejection structure includes a fixed part and a sliding part, wherein the sliding part and the fixed part are displaced and matched to make the base paper and the label produce different deformations to realize label rejection; The tension compensation structure comprises a movable guide roller, wherein the movable guide roller is arranged along the label conveying direction, and the label paper path is changed by the movable guide roller to maintain the stability of the paper path tension; The lever transmission structure includes a first rocker arm and a second rocker arm hinged to each other, the other end of the first rocker arm is hinged to the sliding member, and the other end of the second rocker arm is hinged to the movable guide roller. The first rocker arm and the second rocker arm constitute a lever balance structure for linking the displacement of the sliding member and the tension compensation structure to achieve automatic tension compensation of the label paper path.

[0006] By adopting the above technical scheme, the present application proposes a passive tension compensation scheme based on the lever transmission principle, by connecting the label removal sliding member and the tension compensation guide roller with a lever structure of a specific proportion, and utilizing the torque balance characteristics of the lever, the synchronous linkage of the label removal action and the tension compensation is realized; specifically, when the sliding member moves downward to remove the labels, the lever transmission structure composed of the first rocker arm and the second rocker arm automatically drives the movable guide roller to move upward an equal distance, thereby actively changing the paper path length and compensating for the tension change caused by the label removal.

[0007] Optionally, the sliding member is connected to the frame via a first sliding rail, and the movable guide roller is connected to the frame via a second sliding rail, so as to limit the displacement directions of the sliding member and the movable guide roller.

[0008] By adopting the above technical scheme, the present application improves the movement mode of the label removal sliding member and the movable guide roller; since the sliding member and the guide roller need to perform precise reciprocating motion during the label removal and tension compensation process, if they are only connected by a hinged manner, they are easily disturbed by lateral forces and cause shaking, resulting in deviation of the motion trajectory; the present application strictly limits the movement of the sliding member and the movable guide roller within their respective slide rails by respectively arranging a first slide rail and a second slide rail on the frame; specifically, the first slide rail is arranged along the label removal direction to ensure that the sliding member can only move up and down for label removal; the second slide rail is arranged parallel to the first slide rail to ensure that the movable guide roller always maintains a vertical posture during tension compensation; it can not only eliminate lateral interference forces, but also ensure movement accuracy through the slide rails, and the guiding effect of the slide rails can also reduce the wear of the articulated bearings.

[0009] Optionally, the second swing rod is hinged to the frame through a fixed shaft to form a support point of the lever transmission structure. The hinge points of the first swing rod and the slider and the hinge points of the second swing rod and the movable guide roller are respectively located on both sides of the fixed shaft and at equal distances from the fixed shaft, so that the downward displacement of the slider is equal to the upward compensation amount of the movable guide roller.

[0010] By adopting the above technical solution, the present application designs an equal-arm lever structure. By setting the fixed shaft of the second swing rod as the fulcrum and making the hinge points of the first swing rod and the slider and the hinge points of the second swing rod and the movable guide roller be at equal distances on both sides of the fixed shaft; when the slider moves downward, due to the characteristics of this equal-arm lever, the movable guide roller will automatically move upward by an equal distance, so that an accurate compensation ratio can be maintained at any position; precise compensation of tension can be achieved without complex transmission ratio calculation and adjustment.

[0011] Optionally, the tension compensation structure further includes a first fixed guide roller and a second fixed guide roller. The first fixed guide roller is arranged at the front end of the paper path, the second fixed guide roller is arranged at the rear end of the paper path, and the movable guide roller is arranged between the first fixed guide roller and the second fixed guide roller, hinged to the second swing rod and used for tension compensation. The first fixed guide roller, the movable guide roller and the second fixed guide roller jointly form an S-shaped paper path.

[0012] By adopting the above technical solution, the present application arranges 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 arranges the movable guide roller in the middle position; making the label paper path form an S-shaped trend not only increases the wrapping angle between the paper tape and the guide roller, but also evenly distributes the tension throughout the paper path.

[0013] Optionally, the slider includes a semi-circular label stripping shaft and a fixed seat. The semi-circular label stripping shaft and the fixed part cooperate to form a circular label stripping shaft in a static state; when the slider moves downward, a turning angle for label stripping is formed between the slider and the fixed part, so that the base paper fits the turning angle with the tension while the label remains straight, thereby realizing label stripping.

[0014] By adopting the above technical solution, when label stripping is required, the semi-circular label stripping shaft moves downward, forming a dynamically adjustable turning angle with the fixed part. The base paper naturally fits this turning angle under the action of tension, while the relatively hard label remains straight, thereby realizing accurate label stripping; using the principle of material rigidity difference, it not only protects the integrity of the base paper but also improves the label stripping efficiency.

[0015] Second aspect, the present application provides a control method for the label rejection automatic compensation mechanism of a high-speed detection label-changing device, which is applied to the above-mentioned automatic compensation mechanism, and includes the following steps: Detect the label position information, and judge whether it is a defective label according to the label position information; When a defective label is detected, control the sliding member to move downward by a preset distance, so as to form a preset turning angle between the sliding member and the fixed member; Real-time monitor the paper path tension value. When the paper path tension value exceeds the preset range, adjust the displacement distance of the sliding member until the paper path tension value returns to the preset range.

[0016] By adopting the above technical solution, the present application provides a control method for the label rejection automatic compensation mechanism of a high-speed detection label-changing device. Due to the 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 in the case of large tension fluctuations, too large or too small turning angles will affect the label rejection effect; the present application first detects the label position information in real time through a sensor and judges defective labels, and then controls the sliding member to move downward by a preset distance to form an initial turning angle. At the same time, the paper path tension value is monitored in real time. When the tension value exceeds the preset range, the system will automatically fine-tune the displacement of the sliding member 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.

[0017] Optionally, before detecting the label position information, the method further includes the following steps: Obtain the label specification information and the device operation status information; Input the label specification information and the device operation status information into a preset sliding member displacement model to determine the initial value of the preset distance and the initial interval of the preset range.

[0018] By adopting the above technical solution, the present application optimizes the parameter initialization process of the label rejection control method; due to the differences in material, size and flexibility of different specification labels, if relying entirely on real-time feedback adjustment, it often takes multiple tests to find suitable label rejection parameters, which not only reduces the changeover efficiency but also causes a large amount of material waste; the present application first obtains the label specification information and the device operation status information, and then inputs this information into a pre-established sliding member displacement model, and calculates the optimal initial value of the preset distance and the initial interval of the preset range through the model; realizing the intelligent preset of label rejection parameters and greatly reducing the manual debugging time.

[0019] Optionally, the method further includes the following steps: Query the device operation and maintenance database to obtain historical label rejection parameters; Adjust the initial value of the preset distance based on the historical label rejection parameters; Perform label rejection control based on the adjusted preset distance.

[0020] By adopting the above technical solution, since it is difficult for the theoretical model to fully consider all influencing factors in actual production, such as environmental humidity, material aging, equipment wear, etc., the initial parameters calculated only by the model may deviate from the optimal working state; before performing label rejection control in this application, first query the operation and maintenance database to obtain historical label rejection parameters under similar working conditions, then correct the initial value of the preset distance predicted by the model according to the historical parameters, and finally use the optimized parameters for label rejection control; transform the actual operation experience of the equipment into quantifiable optimization basis, and realize the organic combination of theoretical calculation and practical experience.

[0021] Optionally, adjusting the initial value of the preset distance based on the historical label rejection parameters specifically includes the following steps: Obtain the historical preset distance and historical tension data according to the historical label rejection parameters; Compare the current preset distance with the historical preset distance, and mark the label specifications with similar comparison results as similar specifications; Adjust the corresponding initial value of the preset distance according to the historical tension data of the similar specifications.

[0022] By adopting the above technical solution, when the production line processes labels with similar thicknesses but different sizes, it is necessary to optimize the parameters separately, resulting in too long changeover preparation time; this application first extracts the preset distance and tension data from the historical database, then finds out the 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; utilizes the similarity characteristics between specifications, and realizes the cross-specification migration of experience by establishing a parameter correlation network, improving the experience reuse efficiency.

[0023] Optionally, the method further includes the following steps: Real-time collect the label conveying speed and paper path tension data; Perform time series analysis on the label conveying speed and the paper path tension data to obtain the change trend; Match the change trend with the preset abnormal feature library. When an abnormal feature is matched, calculate the pre-adjustment displacement of the sliding member according to the adjustment strategy corresponding to the abnormal feature; Control the sliding member to move according to the pre-adjustment displacement.

[0024] By adopting the above technical solution, since the speed fluctuations and tension fluctuations in the production process often have certain regularities, if the adjustment is carried out only when the tension exceeds the preset range, it may lead to fluctuations in the label rejection quality or even equipment failures; the system of this application collects the label conveying speed and the paper path tension data in real time, performs time series analysis on these data to obtain the change trend, matches the trend characteristics with the pre-established abnormal feature library, and once an abnormal feature that matches is found, immediately calculates the pre-adjustment amount according to the corresponding adjustment strategy and controls the sliding member to adjust in place in advance; by trend prediction and early intervention, the label rejection process is stabilized, and the problem of the lag of traditional feedback control is solved.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. This application proposes a passive tension compensation scheme based on the lever transmission principle. By connecting the label rejection sliding member and the tension compensation guide roller with a lever structure of a specific ratio, and utilizing the torque balance characteristic of the lever, the synchronous linkage of the label rejection action and the tension compensation is realized; specifically, when the sliding member moves downward for label rejection, through the lever transmission structure composed of the first swing rod and the second swing rod, the movable guide roller is automatically driven to move upward by an equal distance, thereby actively changing the paper path length and compensating for the tension change caused by label rejection. 2. This application provides a control method for the label rejection automatic compensation mechanism of a high-speed detection label-changing device. Due to the 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 in the case of large tension fluctuations, too large or too small turning angles will affect the label rejection effect; this application first detects the label position information in real time through a sensor and judges defective labels, and then controls the sliding member to move downward by a preset distance to form an initial turning angle. At the same time, the paper path tension value is monitored in real time. When the tension value exceeds the preset range, the system will automatically fine-tune the displacement amount of the sliding member until the tension returns to a reasonable range; by combining mechanical compensation with intelligent control and performing dynamic adjustment through real-time feedback, the label rejection process can adapt to different working conditions. 3. This application optimizes the parameter initialization process of the label rejection control method; due to the differences in the material, size, and flexibility of different specifications of labels, if relying solely on real-time feedback adjustment, it often takes multiple tests to find suitable label rejection parameters, which not only reduces the changeover efficiency but also causes a large amount of material waste; this application first obtains the specification information of the label and the operating state information of the equipment, and then inputs this information into the pre-established sliding member displacement model, and calculates the optimal initial value of the preset distance and the initial interval of the preset range through model calculation; realizing the intelligent preset of label rejection parameters and greatly reducing the manual debugging time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the high-speed detection label-changing device according to the embodiment of this application; Figure 2 It is a schematic structural diagram of the label removal automatic compensation mechanism in the embodiment of the present application; Figure 3 It is a schematic cross-sectional view of the label removal automatic compensation mechanism in the embodiment of the present application; Figure 4 It is a schematic diagram of the paper path direction in the embodiment of the present application; Figure 5 It is a schematic flowchart of the control method of the label removal automatic compensation mechanism of a high-speed detection label changing device in the embodiment of the present application; Figure 6 It is a schematic flowchart of determining the initial interval in the control method of the label removal automatic compensation mechanism of a high-speed detection label changing device in the embodiment of the present application; Figure 7 It is a schematic flowchart of adjusting the initial value in the control method of the label removal automatic compensation mechanism of a high-speed detection label changing device in the embodiment of the present application; Figure 8 It is a schematic flowchart of step S720 in the control method of the label removal automatic compensation mechanism of a high-speed detection label changing device in the embodiment of the present application; Figure 9 It is a schematic flowchart of pre-adjustment in the control method of the label removal automatic compensation mechanism of a high-speed detection label changing device in the embodiment of the present application; Explanation of reference numerals: 1. Unwinding mechanism; 2. First winding mechanism; 3. Main driving device; 4. First detection platform; 5. Labeling head device; 6. Label head adjustment mechanism; 7. Label removal automatic compensation mechanism; 8. Second detection platform; 9. Second winding mechanism; 71. Label removal structure; 72. Tension compensation structure; 73. Lever transmission structure; 711. Fixed part; 712. Sliding part; 713. Waste collection box; 721. Movable guide roller; 722. First fixed guide roller; 723. Second fixed guide roller; 731. First swing rod; 732. Second swing rod; 733. First slide rail; 734. Fixed shaft; 735. Connecting piece; 736. Second slide rail; 7121. Semi-circular label removal shaft; 7122. Fixed seat. Detailed implementation manners

[0027] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of the present application, the singular forms "a", "an", "the", "above-mentioned", "said", and "this" are also intended to include the plural forms, unless there is a clear contrary indication in the context. It should also be understood that the term " / and" used in the present application refers to any or all possible combinations including one or more of the listed items.

[0028] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and should not be construed as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings of the specification.

[0030] In a first aspect, the present application provides a label rejection automatic compensation mechanism for a high-speed detection label changing device, which is applied in a high-speed detection label changing device. As Figure 1 shown, the high-speed detection label changing device includes an unwinding mechanism 1, a first winding mechanism 2, a main driving device 3, a first detection platform 4, a label head device 5, a label head adjusting mechanism 6, a label rejection automatic compensation mechanism 7, a second detection platform 8, and a second winding mechanism 9. It can be understood that the first detection platform 4 and the second detection platform 8 include an RFID detection module and a CCD camera detection module for comprehensively detecting labels from different dimensions. Among them, the RFID detection module uses radio frequency identification (RFID) technology, also known as electronic label or wireless radio frequency identification technology, to read the information of the label chip by using a detection antenna, and analyze the content and signal strength of the label information (such as EPC duplicate number, TID missing number, RSSI signal value lower than the set value, etc.) to determine whether the label is a defective product. The CCD camera detection module reads the barcode or two-dimensional code information of the label through optical character recognition (OCR) technology, calculates the offset position in combination with preset reference points, and simultaneously intelligently analyzes whether the stains and appearance patterns on the label surface are qualified.

[0031] The label to be detected is released by the unwinding mechanism 1, and the first winding mechanism 2 winds up the label to be detected, which is controlled by the main driving device 3 to be conveyed to the first detection platform 4 for detection, and a FIFO queue identification system is used to mark defective products. After detection, the label passes through the position of the label head device 5, and the label head adjusting mechanism 6 cooperates with the label rejection automatic compensation mechanism 7 to reject defective products, and at the same time complete the replenishment of new labels. The label after label replenishment passes through the second detection platform 8 for re-inspection to ensure the label changing quality, and finally the qualified products are wound up by the second winding mechanism 9. The entire detection and label changing process requires precise cooperation of each mechanism to ensure accuracy during high-speed operation.

[0032] Referring to Figure 2 and Figure 3, the label removing automatic compensation mechanism 7 includes a label removing structure 71, a tension compensation structure 72 and a lever transmission structure 73; the label removing structure 71 includes a fixed part 711 and a sliding part 712, the sliding part 712 is displacement - matched with the fixed part 711, the tension compensation structure 72 includes a movable guide roller 721, the movable guide roller 721 is arranged along the label conveying direction, and the label paper path is changed through the movable guide roller 721; the lever transmission structure 73 includes a first swing rod 731 and a second swing rod 732 which are hinged to each other, the other end of the first swing rod 731 is hinged to the sliding part 712, the other end of the second swing rod 732 is hinged to the movable guide roller 721, and the first swing rod 731 and the second swing rod 732 form a lever balance structure.

[0033] Specifically, the sliding part 712 includes a semi - circular label removing shaft 7121 and a fixed seat 7122. The semi - circular label removing shaft 7121 cooperates with the fixed part 711 to form a circular label removing shaft in the static state; when the servo motor controls the sliding part 712 to move downwards, a turning angle for label removing is formed between the sliding part 712 and the fixed shaft 734 seat, so that the base paper adheres to the turning angle along with the tension and the label remains flat, thereby realizing label removal; the fixed seat 7122 is connected to the frame through a first slide rail 733, the first swing rod 731 is hinged to the fixed seat 7122, and the first slide rail 733 limits the up - and - down displacement of the sliding part 712 and the first swing rod 731. The second swing rod 732 is hinged to the frame through a fixed shaft 734 to form a support point of the lever transmission structure 73. The hinge point of the first swing rod 731 and the sliding part 712 and the hinge point of the second swing rod 732 and the movable guide roller 721 are respectively located on both sides of the fixed shaft 734 and are at equal distances from the fixed shaft 734, so that the downward displacement amount of the sliding part 712 is equal to the upward compensation amount of the movable guide roller 721. When the first swing rod 731 moves up and down, one end of the second swing rod 732 rotates around the fixed shaft 734 under the drive of the first swing rod 731, thereby driving the other end to move up and down. A connecting piece 735 is movably connected to the other end of the second swing rod 732, the movable guide roller 721 is fixedly connected to the connecting piece 735, and the connecting piece 735 is connected to the frame through a second slide rail 736, thereby limiting the displacement direction of the movable guide roller 721. When the sliding part 712 moves downwards, due to the equal - arm lever characteristic of the second swing rod 732, the connecting piece 735 will drive the movable guide roller 721 to automatically move upwards by an equal distance.

[0034] Refer to Figure 4, 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 arranged at the front end of the paper path, and the second fixed guide roller 723 is arranged at the rear end of the paper path. The movable guide roller 721 is arranged between the first fixed guide roller 722 and the second fixed guide roller 723, is hinged to the second swing rod 732 and is 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 direction. As Figure 4 shown, the arrow indicates the paper path direction. The label passes under the second fixed guide roller 723, then above the movable guide roller 721, under the first fixed guide roller 722, and reaches the label removing structure 71. The label is removed by the label removing structure 71, and the removed label 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, and the paper path passed by the label becomes longer, thereby increasing the tension and realizing the tension compensation.

[0035] In a second aspect, the present application provides a control method for a label removing automatic compensation mechanism of a high-speed detection label changing device. The control method for the label removing automatic compensation mechanism of the high-speed detection label changing device of the present application will be described below in combination with the above-mentioned label removing automatic compensation mechanism of the high-speed detection label changing device.

[0036] Referring to Figure 5 , a control method for a label removing automatic compensation mechanism of a high-speed detection label changing device includes the following steps: S510, detecting the label position information, and judging whether it is a defective label according to the label position information.

[0037] In this embodiment, the label position information refers to the position state information of the label to be detected during the high-speed movement. The defective label refers to the label with quality defects found during the detection. The quality defects include label deviation, label breakage, bubbles, wrinkles, printing defects, material defects, size deviation, uneven edges, adhesive residue, and surface scratches, etc.

[0038] Specifically, different label products correspond to different quality requirements. In this embodiment, the label to be detected is a pharmaceutical packaging label. Obtaining the label position information, that is, through detection devices such as photoelectric sensors, CCD cameras, and displacement sensors on the first detection platform, collecting the real-time position data of the label during transportation, and extracting the state information related to the label quality from it to obtain the label position information. Among them, the label position information includes the center position, edge contour, surface features, and displacement parameters of the label, etc. It should be noted that the label position information does not refer to pure spatial coordinate information. The label position information refers to the overall movement state information of the current label during high-speed transportation, and this position information is updated in real time whenever a new label is detected.

[0039] Furthermore, if the label quality is related to the equipment operation parameters, for example, the conveying speed of the main driving device, or the tension value of the tension compensation structure, etc., these operation parameters are also regarded as control parameters to be monitored. When a defective label is detected, in addition to performing the label rejection operation, the system will also make adaptive adjustments to the relevant operation parameters to prevent similar quality problems from occurring in subsequent labels. The system presets three levels of quality determination criteria: the first level is for obvious defects (such as breakage, missing, etc.); the second level is for position deviation. The edge offset is measured by a displacement sensor, and if the offset exceeds ±0.3 mm, it is determined as a defective product; the third level is for surface quality, which is comprehensively determined 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 of the paper path tension value in real time. By setting tension sensors at key positions, a tension-displacement correspondence table is established to guide the displacement adjustment of the sliding part.

[0040] S520. When a defective label is detected, control the sliding part to move downward by a preset distance so that a preset turning angle is formed between the sliding part and the fixed part.

[0041] In this embodiment, the preset distance refers to the displacement amount that the sliding part needs to move downward to form an effective label rejection action. The preset turning angle refers to the optimal angle value formed between the sliding part and the fixed part for realizing label rejection.

[0042] Specifically, based on the detection result of the defective label, the system needs to perform an accurate label rejection action. The displacement amount and turning angle value of the sliding part corresponding to each type of defective label should be accurately set to ensure the reliability of label rejection. For example, if the downward movement distance of the sliding part is too small, it may lead to incomplete label rejection; if the downward movement distance is too large, it may cause a drastic fluctuation in the paper path tension and affect the equipment stability. Therefore, a displacement-angle correspondence table under different working conditions is pre-stored in the preset label rejection parameter database. According to the currently detected defective label type and the corresponding process parameter requirements, query the displacement-angle correspondence table in the preset label rejection parameter database to determine the downward movement distance and turning angle value of the sliding part, and obtain the optimal label rejection execution parameters.

[0043] Furthermore, the system will record the actual effects of each label rejection action, including data such as displacement accuracy, angle implementation value, label rejection success rate, etc., and update the displacement-angle correspondence table regularly to achieve adaptive optimization.

[0044] S530. Monitor the paper path tension value in real time. When the paper path tension value exceeds the preset range, adjust the displacement distance of the sliding part until the paper path tension value returns to the preset range.

[0045] In this embodiment, the paper path tension value is the tension state value of the label material during transportation. After performing the label rejection action in step S520, the system will monitor the change of the paper path tension value in real time and fine-tune the position of the sliding part when necessary.

[0046] Specifically, based on the real-time monitoring data of the tension sensor, the system needs to perform precise tension compensation actions. The displacement adjustment amount of the sliding part corresponding to each tension value interval should be accurately set to ensure the stability of the tension. For example, if the compensation displacement amount is too small, it may cause the tension fluctuation to not be effectively suppressed; if the compensation displacement amount is too large, it may cause over-regulation and result in tension oscillation. Therefore, the system sets a reasonable range of tension values. When the tension value exceeds this range after the label rejection action is performed, the system will perform position fine-tuning based on the initial label rejection position. Through this dynamic adjustment mechanism, the effectiveness of the label rejection action is ensured, and at the same time, the stable operation of the system can be maintained.

[0047] In one embodiment, referring to Figure 6 , before step S510 of detecting the label position information, the method further includes the following steps: S610. Obtain the label specification information and the device operation status information.

[0048] In this embodiment, the label specification information refers to the physical characteristic parameters of the label to be detected. The device operation status information refers to the real-time operation parameters of the high-speed detection and label-changing device.

[0049] Specifically, based on the production task requirements, obtain the label specification information of the current production batch, match the complete parameter index table of the corresponding label type from the preset label parameter database, and input the specific parameter information of the current label into the parameter index table to obtain the complete specification information of the current label; in addition, based on the device operation status monitoring system, obtain the real-time operation parameters of the device, including the main drive speed, the paper path tension reference value, and the environmental temperature and humidity, combine the historical operation data, judge the stability of the current device operation status, and then obtain the reliability evaluation result of the device operation.

[0050] S620. Input the label specification information and the device operation status information into the preset sliding part displacement model to determine the initial value of the preset distance and the initial interval of the preset range.

[0051] Specifically, in the preset slider displacement model, in addition to including the reference correspondence table of label specification parameters, it also includes displacement compensation coefficients under different operating states, that is, correction values for converting label specifications and equipment states into displacement parameters. Different types of labels have different corresponding 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 the difference in material toughness, their corresponding displacement compensation coefficients are different. Therefore, the initially determined preset distance initial value and the initial interval of the preset range are also different. Therefore, through the preset slider displacement model, the reference displacement value is determined in combination with label specification information, and then compensation correction is performed according to equipment operating state information. For example, weighted calculation of the reference displacement value and the state compensation coefficient is used to obtain the initial value of the preset distance and the initial interval of the preset range.

[0052] In one embodiment, referring to Figure 7 , the method further includes the following steps: S710. Query the equipment operation and maintenance database to obtain historical label rejection parameters.

[0053] In this embodiment, the historical label rejection parameters refer to the label rejection control data recorded during the previous operation of the equipment. The equipment operation and maintenance database stores key operation parameters including preset distance, actual displacement, label rejection success rate, and tension fluctuation.

[0054] Specifically, the system filters out historical label rejection parameters under the same or similar conditions within the most recent month from the equipment operation and maintenance database according to the label specification information (such as material and size) of the current production task and the equipment operation state information (such as operating speed and environmental conditions). These parameters include preset distance values at different time periods and their corresponding label rejection effect data.

[0055] S720. Adjust the initial value of the preset distance based on the historical label rejection parameters.

[0056] In this embodiment, the system calculates the optimal preset distance value by analyzing the correspondence between the preset distance and the label rejection effect in the historical label rejection parameters.

[0057] Specifically, the optimization model mainly considers the label rejection success rate, the range of tension fluctuation, and equipment stability. For example, when historical data shows that under specific working conditions, the comprehensive effect is the best when the preset distance is 2.3 mm (the label rejection success rate reaches 98% and the tension fluctuation is less than 0.2 N), the system will adjust the current initial value of the preset distance to 2.3 mm. If historical data shows a correlation between the preset distance and the running duration, the system will also perform compensation adjustment according to the current equipment running duration.

[0058] S730. Perform label rejection control based on the adjusted preset distance.

[0059] In this embodiment, the adjusted preset distance is used as a new control parameter, and the system simultaneously activates the parameter verification mechanism to monitor the effect of label rejection.

[0060] In one embodiment, referring to Figure 8 , in step S720, based on the historical label rejection parameters, the initial value of the preset distance is adjusted, which specifically includes the following steps: S721. Obtain the historical preset distance and historical tension data according to the historical label rejection parameters.

[0061] In this embodiment, the historical preset distance refers to the set value of the slider displacement each time historical label rejection control is performed. The historical tension data refers to the corresponding paper path tension acquisition data and tension control index data.

[0062] Specifically, each time historical label rejection control is performed, the preset distance is set and the tension is monitored. Therefore, the preset distance data each time historical label rejection control is performed, as well as the tension monitoring data and the corresponding control index data, that is, the historical tension data, are extracted from the historical label rejection parameters.

[0063] S722. Compare the current preset distance with the historical preset distance, and mark the label specifications with similar comparison results as similar specifications.

[0064] In this embodiment, the similar specifications refer to the label specifications where the deviation between the current preset distance and the historical preset distance is within the allowable range.

[0065] Specifically, compare the historical preset distance corresponding to each label specification with the currently calculated preset distance, that is, compare the current preset distance with the historical preset distance, and mark the label specifications with a comparison result deviation within the range of ±10% as similar specifications, that is, the label specifications where the current preset distance and the historical preset distance are similar.

[0066] S723. Adjust the corresponding initial value of the preset distance according to the historical tension data of the similar specifications.

[0067] Specifically, similar specifications indicate that the preset distance reference values corresponding to the label specifications are similar. However, due to the accumulation of equipment operation time, there will be certain changes in mechanical characteristics, so the corresponding control parameters and control indicators should have certain dynamic adjustments, and the label rejection control indicator is determined by the preset distance. Therefore, analyze the historical tension data of similar specifications, judge the change trend of the historical tension data of similar specifications, and then analyze the optimization direction of the current label rejection control. In this embodiment, analyzing the historical tension data of similar specifications can be through a machine learning model. This machine learning model learns the parameter performance and the correlation relationships between various parameters when a large number of corresponding similar specifications are operating normally, and then predicts the current optimal preset distance of the similar specifications according to the correlation relationships between various parameters, and judges whether the current preset distance is within the optimal range. For example, when the tension fluctuation of a certain batch of labels exceeds ±0.2N, analyze the historical tension data to optimize the preset distance value. Based on this, generate an updated preset distance by analyzing the historical tension data of similar specifications, and adjust the initial value of the preset distance of the corresponding label specification based on the updated preset distance.

[0068] In one embodiment, referring to Figure 9 , the method further includes the following steps: S910. Real-time collect the label conveying speed and the paper path tension data.

[0069] In this embodiment, the label conveying speed is the real-time transmission speed of the label in the transportation channel. The paper path tension data is the real-time data collected by the tension sensor during the label conveying process.

[0070] Specifically, the system uses speed sensors and tension sensors distributed at key positions in the conveying channel to collect the speed and tension data during the label conveying process in real time with a sampling period of 10 ms. The speed sensor collects the rotational speed information of the main driving wheel and the driven wheel, and converts it to obtain the actual label conveying speed; the tension sensor collects the real-time tension value at the tension control point and records the tension fluctuation situation.

[0071] S920. Perform time series analysis on the label conveying speed and the paper path tension data to obtain the change trend.

[0072] In this embodiment, the time series analysis mainly focuses on the change rules and correlations of the speed and tension data. The change trend includes the fluctuation amplitude, periodic change, and mutation characteristics of the data.

[0073] Specifically, the system uses a sliding window method to process continuously acquired data, and calculates the change rates, fluctuation ranges, and trend characteristics of speed and tension. For example, when it is detected that the tension value fluctuates by more than 0.5 N within 1 second, or the speed fluctuates by more than ±3%, the system will mark this change trend as a potential anomaly. At the same time, the system also analyzes the phase relationship between the speed and tension changes to identify the correlation pattern between the two.

[0074] S930. Match the change trend with a preset abnormal feature library. When an abnormal feature is matched, calculate the pre-adjustment displacement of the sliding part according to the adjustment strategy corresponding to the abnormal feature.

[0075] In this embodiment, the abnormal feature library stores various typical abnormal patterns and their corresponding processing strategies. The pre-adjustment displacement refers to the preventive adjustment amount of the position of the sliding part before the occurrence of an abnormality.

[0076] Specifically, the system compares the identified change trend with the feature templates in the abnormal feature library. For example, when it is detected that the trend of "tension continuously rising and speed fluctuation increasing", the system will match it with the "label adhesion omen" feature in the feature library. If the match is successful, the system calculates the displacement amount that the sliding part needs to be adjusted according to the adjustment strategy corresponding to the abnormal feature and combines the current operating parameters. The adjustment strategy takes into account factors such as the severity of the abnormality, the development speed, and the current working conditions, and generates the pre-adjustment displacement through a preset compensation algorithm.

[0077] S940. Control the sliding part to move according to the pre-adjustment displacement amount.

[0078] In this embodiment, the system performs preventive adjustment and pre-emptively responds to possible abnormal situations by precisely controlling the position of the sliding part.

[0079] Specifically, the system converts the calculated pre-adjustment displacement amount into a control command for the driving motor of the sliding part and performs displacement adjustment in a segmented acceleration and deceleration manner. During the adjustment process, continuously monitor the changes in speed and tension to verify the adjustment effect. If the parameters tend to be stable after adjustment, this preventive adjustment is completed; if the abnormal trend is still developing, the system will re-evaluate the adjustment strategy and execute a new adjustment action until the system returns to a stable operating state.

[0080] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment, characterized in that: include: The label rejection structure (71) comprises a fixing member (711) and a sliding member (712), wherein the sliding member (712) and the fixing member (711) are displaced and matched to cause the base paper and the label to produce different deformations to realize label rejection; A tension compensation structure (72) comprises a movable guide roller (721), wherein the movable guide roller (721) is arranged along the label conveying direction, and the label paper path is changed by the movable guide roller (721) to maintain the stability of the paper path tension; The lever transmission structure (73) includes a first rocker arm (731) and a second rocker arm (732) which are hinged to each other, wherein the other end of the first rocker arm (731) is hinged to the sliding member (712), and the other end of the second rocker arm (732) is hinged to the movable guide roller (721), and the first rocker arm (731) and the second rocker arm (732) constitute a lever balancing structure for linking the displacement of the sliding member (712) and the tension compensation structure (72) to realize automatic tension compensation of the label paper path.

2. The automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment according to claim 1 is characterized in that: The sliding member (712) is connected to the frame via a first sliding rail (733), and the movable guide roller (721) is connected to the frame via a second sliding rail (736), which are used to limit the displacement direction of the sliding member (712) and the movable guide roller (721).

3. The automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment according to claim 2 is characterized in that: The second rocker arm (732) is hinged to the frame via a fixed shaft (734) to form a 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 respectively 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 amount of the movable guide roller (721).

4. The automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment according to claim 1 is characterized in that: The tension compensation structure (72) also includes a first fixed guide roller (722) and a second fixed guide roller (723), wherein the first fixed guide roller (722) is arranged at the front end of the paper path, and the second fixed guide roller (723) is arranged at the rear end of the paper path. The movable guide roller (721) is arranged between the first fixed guide roller (722) and the second fixed guide roller (723), is hinged to the second swing rod (732) and is used for tension compensation, and 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 direction.

5. The automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment according to claim 1 is characterized in that: The sliding member (712) comprises a semicircular label rejection shaft (7121) and a fixing seat (7122); the semicircular label rejection shaft (7121) cooperates with the fixing member (711) to form a circular label rejection shaft in a stationary state; when the sliding member (712) moves downward, a turning angle for label rejection is formed between the sliding member (712) and the fixing member (711), so that the base paper is attached to the turning angle due to tension and the label remains straight, thereby achieving label rejection.

6. A control method for an automatic compensation mechanism for label removal of a high-speed label detection and label changing device, characterized in that: The automatic compensation mechanism used in any one of claims 1 to 5 comprises the following steps: Detecting label position information, and determining whether the label is a bad label according to the label position information; When a bad label is detected, the sliding member is controlled to move downward by a preset distance so that a preset turning angle is formed between the sliding member and the fixing member; The paper path tension value is monitored in real time, and when the paper path tension value exceeds a preset range, the displacement distance of the sliding member is adjusted until the paper path tension value returns to within the preset range.

7. The control method of the automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment according to claim 6 is characterized in that: Before detecting the tag position information, the method further includes the following steps: Obtain label specification information and equipment operation status information; The label specification information and the equipment operation status information are input into a preset sliding member displacement model to determine an initial value of the preset distance and an initial interval of the preset range.

8. The control method of the automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment according to claim 7 is characterized in that: The method further comprises the steps of: Query the equipment operation and maintenance database to obtain historical marking parameters; Based on the historical marking parameter, adjusting the initial value of the preset distance; The marking control is performed based on the adjusted preset distance.

9. The control method of the automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment according to claim 8 is characterized in that: Based on the historical marking parameter, adjusting the initial value of the preset distance specifically includes the following steps: According to the historical marking rejection parameters, historical preset distance and historical tension data are obtained; Compare the current preset distance with the historical preset distance, and mark the tag specifications with similar comparison results as similar specifications; According to the historical tension data of similar specifications, the corresponding preset distance initial value is adjusted.

10. The control method of the automatic compensation mechanism for label rejection of high-speed label detection and label changing equipment according to claim 6, characterized in that: The method further comprises the steps of: Real-time collection of label conveying speed and paper path tension data; Performing time series analysis on the label conveying speed and the paper path tension data to obtain a change trend; Matching the change trend with a preset abnormal feature library, and when an abnormal feature is matched, calculating the pre-adjusted displacement of the sliding member according to an adjustment strategy corresponding to the abnormal feature; The sliding member is controlled to move according to the pre-adjusted displacement.

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