Printed product binding quality monitoring control method and system, medium and product

Abstract

The invention discloses a printed matter binding quality monitoring control method and system, a medium and a product. According to the method, binding defect data are collected through page turning equipment, a binding quality distribution diagram is generated by combining a tension test, whether the firmness of the book reaches the standard or not is judged, partial enhancement processing is conducted on insufficient sections, and it is ensured that the binding quality reaches the standard. According to the method, a real use scene is simulated by means of automatic page turning equipment, binding defect data at different turning angles are obtained, the tensile strength data obtained by tension testing equipment is combined, the phenomena of loosening and falling of binding parts caused by repeated turning in subsequent use are simulated, and dynamic evaluation of binding quality is achieved. And the binding part is divided into a plurality of stress sections, so that the binding part can be finely divided, and a basis is provided for subsequent local enhancement treatment. According to the multi-dimensional data acquisition and analysis mode, the defects of a traditional static detection method are overcome, and the comprehensiveness of a detection result is improved.

Description

Technical Field

[0001] The present application relates to the field of printed product binding, and in particular to a printed product binding quality monitoring and control method, system, medium and product. Background Art

[0002] With the widespread use of printed products, especially heavy and frequently used books like dictionaries and reference books, the quality of their binding directly impacts the product's lifespan and user experience. The quality of the binding not only determines whether the book maintains structural stability during long-term reading, but also affects the smoothness of page turning and overall durability.

[0003] In the related art, a book binding quality detection method based on computer vision technology is proposed. Computer vision technology is used to detect the binding quality. An industrial CCD camera is used to capture images of the side of the book spine. The images are processed and analyzed to detect the appearance features of the spine. The images are compared with the preset complete image features to obtain the binding quality.

[0004] However, existing technologies that use computer vision to inspect book binding quality primarily rely on static features. However, book binding performance is not static. During use, due to repeated flipping, pressure, and other external forces, bindings can gradually degrade, such as loosening and falling apart. The hidden nature of this degradation makes it difficult to detect through static images, leading to significant limitations in existing technologies for assessing binding quality. Summary of the Invention

[0005] The present application provides a method, system, medium and product for monitoring and controlling the binding quality of printed products, which are used to solve the problem that the binding quality inspection of books cannot reflect the loosening or falling off of the binding parts caused by repeated reading during use, thereby improving the comprehensiveness of the binding quality inspection.

[0006] In a first aspect, the present application provides a printed product binding quality monitoring and control method, which is applied to a control processing unit of a printed product binding quality monitoring and control system, the printed product binding quality monitoring and control system further comprising an automatic page turning device and a tensile testing device, the automatic page turning device and the tensile testing device respectively connected to the control processing unit. The method comprises: using the automatic page turning device to perform a single page turning operation on a book, one by one, to obtain binding defect data of the book at different turning angles, the binding defect data including page loosening data and page separation data; and based on the thickness of the book and the binding defect data, dividing the binding area into a plurality of stress-bearing sections along a direction parallel to the long side of the book spine; The tensile testing device is used to perform tensile tests on the multiple stress-bearing sections respectively to obtain tensile strength data of each stress-bearing section at different flipping angles. The tensile test applies an outward tensile force to the book pages at different flipping angles. Based on the tensile strength data and the binding defect data, a binding quality distribution map is generated. The binding quality distribution map is used to display the binding firmness of different sections of the book. Based on the binding quality distribution map, it is determined whether the binding firmness of each section meets the standard. If not, local enhancement processing is performed on the section with insufficient binding firmness to obtain an optimized binding part. The local enhancement processing includes adjusting the binding pressure and applying glue. If so, it is determined that the binding of the book meets the quality standard.

[0007] By adopting the above-mentioned technical solution, this method uses automatic page-turning equipment to simulate real-world usage scenarios, obtaining binding defect data at different flipping angles. Combined with the tensile strength data obtained by the tensile testing equipment, this method simulates the loosening and falling of binding parts caused by repeated flipping during use, thus achieving a dynamic assessment of binding quality. Dividing the binding area into multiple stress-bearing sections enables fine division of the binding area, providing a basis for subsequent local enhancement treatment. This multi-dimensional data collection and analysis method compensates for the shortcomings of traditional static detection methods, improves the comprehensiveness and accuracy of the detection results, and enables the monitoring system to more realistically reflect the binding performance of printed products in actual use.

[0008] In combination with some embodiments of the first aspect, in some embodiments, the tensile test device is used to perform tensile tests on the multiple stress-bearing sections respectively to obtain tensile strength data of each stress-bearing section at different flipping angles, specifically including: performing tensile tests on the multiple stress-bearing sections respectively by the tensile test device to obtain the tensile strength of each stress-bearing section, and the tensile strength is the maximum bearing capacity of the binding part of the book under the action of tension; based on the tensile strength and the different flipping angles, the loosening point and the breaking point of each stress-bearing section are calculated, and the loosening point is the critical value at which the stress-bearing section begins to loosen after the action of tension, and the breaking point is the critical value at which the stress-bearing section breaks after the action of tension; based on the tensile strength, the loosening point and the breaking point, the tensile strength data of each stress-bearing section at different flipping angles are generated.

[0009] By employing this technical solution, tensile testing equipment performs tensile tests on multiple stressed sections, obtaining tensile strength data for each section at different flip angles, and further calculating loosening and breaking points. This process dynamically reflects the binding's stress limit and performance degradation threshold through tensile testing, enabling detailed analysis of the binding's strength in each section. Furthermore, combined with the flip angle, tensile strength data for each section is generated, making the test results more targeted and meaningful. This allows quality assessment to move beyond simple appearance testing to the mechanical performance level, effectively improving the ability to predict binding quality and identifying potential quality issues in advance.

[0010] In combination with some embodiments of the first aspect, in some embodiments, a binding quality distribution map is generated based on the tensile strength data and the binding defect data, specifically including: based on the tensile strength data and the binding defect data, evaluating the looseness degree and fracture risk of the multiple stress-bearing sections; based on the looseness degree and the fracture risk, classifying the binding quality of the multiple stress-bearing sections to obtain binding quality grades, which include qualified grades and weak grades; based on the binding quality grades, generating a binding quality distribution map.

[0011] By employing this technical solution, looseness and breakage risk are assessed and quality classification is performed based on tensile strength and binding defect data, transforming complex quality information into intuitive quality grades. Binding quality distribution maps visually present the quality status of different sections, allowing operators to quickly identify weak areas. This classification and visualization process simplifies the quality assessment process, improves decision-making efficiency, and enables more targeted quality control and local enhancements.

[0012] In combination with some embodiments of the first aspect, in some embodiments, based on the degree of looseness and the risk of fracture, the binding quality of the multiple stress sections is classified to obtain a binding quality grade, specifically including: preliminarily judging the binding quality grade based on the degree of looseness; if the degree of looseness does not reach a preset looseness critical value, further judging the binding quality grade based on the fracture risk; if the fracture risk reaches a preset fracture critical value, determining the binding quality grade as a weak grade; if the fracture risk does not reach a preset fracture critical value, determining the binding quality grade as a qualified grade; if the degree of looseness reaches a preset looseness critical value, determining the binding quality grade as a weak grade.

[0013] By employing this technical solution, a preliminary assessment based on the degree of looseness is performed, followed by a further assessment based on the risk of fracture, forming a multi-tiered quality assessment mechanism. This hierarchical approach ensures both accuracy and efficiency. Pre-set looseness and fracture thresholds serve as objective criteria, eliminating human interference and making the quality grading more scientific and rational. This allows for precise identification of weak areas requiring enhanced treatment, avoiding overtreatment and saving costs.

[0014] In combination with some embodiments of the first aspect, in some embodiments, based on the binding quality distribution map, whether the binding firmness of each section meets the standard is judged, specifically including: based on the binding quality distribution map, comparing the binding quality of the multiple force-bearing sections with a preset quality standard threshold to obtain a comparison result; based on the comparison result, calculating the binding firmness score of each section; based on the binding firmness score, judging whether the binding firmness of each section meets the standard.

[0015] By employing this technical solution, the binding quality of each stressed section is compared against a preset threshold and a score is calculated, achieving digital and standardized quality assessment. The binding strength score serves as an intuitive quantitative indicator, making the quality status of different sections comparable. This standardized scoring system provides a clear reference for quality control, enabling rapid assessment of compliance based on the score. This improves the objectivity and accuracy of quality assessments, ensuring that the binding quality of each stressed section meets requirements.

[0016] In combination with some embodiments of the first aspect, in some embodiments, the section with insufficient binding firmness is subjected to local enhancement processing to obtain an optimized binding position, specifically including: retrieving the tensile strength data of the section with insufficient binding firmness; calculating the glue usage and pressure parameters based on the tensile strength data to generate adjustment data; based on the adjustment data, enhancing the section with insufficient binding firmness to obtain an optimized binding position.

[0017] By employing this technical solution, we retrieve the tensile strength data for areas with insufficient binding strength, enabling us to precisely determine the mechanical properties of these areas. Based on this data, we calculate the glue dosage and pressure parameters, achieving precise local reinforcement. This data-driven adjustment approach avoids the blindness of traditional empirical treatments, making the reinforcement treatment more targeted and effectively improving the strength of weak binding areas. This ensures that the optimized binding area meets actual usage requirements and extends the life of printed products.

[0018] In combination with some embodiments of the first aspect, in some embodiments, after the step of enhancing the section with insufficient binding firmness based on the adjustment data to obtain an optimized binding part, the method includes: re-inspecting the optimized binding part to obtain re-inspection data; comparing the re-inspection data with the tensile strength data to obtain a quality change curve; judging the enhancement effect based on the slope value of the quality change curve; if the slope value reaches a preset slope threshold, determining that the optimized binding part is of qualified binding quality; if the improvement ratio does not reach the preset slope threshold, correcting the adjustment data according to the quality change curve, and returning to perform the enhancement processing step.

[0019] By employing this technical solution, the optimized binding areas are re-inspected and compared with the original data, enabling a visual assessment of the enhancement effect. The slope of the quality change curve serves as a basis for judgment, providing an objective, quantitative standard. If the slope reaches the threshold, the enhancement process is effective and the quality is determined to be acceptable; if it does not, corrections are made. This closed-loop feedback mechanism ensures that each enhancement process is effectively verified and optimized, forming a virtuous cycle of continuous quality improvement, continuously enhancing the binding quality and stability of printed products.

[0020] In the second aspect, the present application provides a printed product binding quality monitoring and control system, including a control processing unit, an automatic page turning device, and a tensile testing device, wherein the automatic page turning device and the tensile testing device are respectively connected to the control processing unit; the control processing unit includes one or more processors and a memory; the memory is coupled to the one or more processors, and the memory is used to store computer program code, which includes computer instructions, and the one or more processors call the computer instructions to enable the control processing unit to execute the method described in the first aspect and any possible implementation method of the first aspect.

[0021] In a third aspect, the present application provides a computer-readable storage medium comprising instructions, which, when executed on a control processing unit, causes the control processing unit to execute the method described in the first aspect and any possible implementation of the first aspect.

[0022] In a fourth aspect, the present application provides a computer program product, which, when executed on a control processing unit, enables the control processing unit to execute the method described in the first aspect and any possible implementation of the first aspect.

[0023] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. By using automatic page-turning equipment to simulate a real page-turning scenario to obtain binding defect data, and combining it with a tensile testing device to conduct tensile tests on multiple stress-bearing sections of the binding area, it is possible to collect multi-dimensional performance data of the binding area at different flipping angles from a dynamic usage perspective. Testing the binding area in different areas can accurately locate the stress conditions in each area, avoiding overlooking local weak points due to overall testing. These data comprehensively reflect the loosening, falling off, and other conditions that may occur in the binding area during actual use, effectively solving the technical problem that existing technologies rely solely on static image detection and cannot reflect the performance degradation of the binding area during subsequent use. This achieves a comprehensive and accurate assessment of the binding quality of printed products and improves the accuracy and reliability of detection.

[0024] 2. Due to the adoption of technical means to conduct tensile tests on each stress-bearing section, calculate its loosening point and breaking point, and obtain tensile strength data at different flipping angles, it is possible to quantitatively analyze the mechanical properties of the binding parts. By determining the loosening point and breaking point, the critical state of the binding part under the action of tension is clearly defined. Combined with tests at different flipping angles, the stress conditions in various actual use scenarios are simulated. This means that the evaluation of binding quality is no longer limited to the surface, but goes deep into the essence of mechanical properties. It effectively solves the problem that the existing technical test results are based on static characteristics and it is difficult to detect the degradation of binding performance. It then achieves the technical effect of accurately predicting the potential quality risks of the binding part and providing a scientific basis for subsequent quality optimization.

[0025] 3. Due to the adoption of the technical means of retrieving the tensile strength data of the section with insufficient binding strength and calculating the glue dosage and pressure parameters for local reinforcement treatment based on this data, it is possible to formulate a targeted reinforcement plan based on the actual mechanical properties of the specific section. The determination of adjustment parameters driven by data has changed the previous method of relying on experience, making the reinforcement treatment more accurate and scientific. It avoids the waste of resources caused by blindly increasing glue or pressure, and at the same time can effectively make up for the strength defects of the weak binding section, effectively solving the problem that the existing technology cannot accurately repair the weak binding parts, thereby achieving the technical effect of improving the quality of the binding section with insufficient strength and ensuring the overall binding quality and service life of the printed products. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a schematic diagram of the structure of the printed product binding quality monitoring and control system in the embodiment of the present application; Figure 2 This is a flow chart of a method for monitoring and controlling the binding quality of printed products according to an embodiment of the present application; Figure 3 Schematic diagram of dividing the binding area into multiple stress-bearing sections along a direction parallel to the long side of the spine in an embodiment of the present application; Figure 4 Schematic diagram of the tensile test in the embodiment of the present application, showing the outward pulling force applied to the book pages at different flipping angles; Figure 5 This is another flow chart of the method for monitoring and controlling the binding quality of printed products according to the embodiment of the present application; Figure 6 It is a hardware structure diagram of the control processing unit in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The terms used in the following examples 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 this application, the singular expressions "a," "an," "said," "above," "the," and "this" are intended to include plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in this application refers to any or all possible combinations comprising one or more of the listed items.

[0028] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more.

[0029] This application provides a printed product binding quality monitoring and control system, including a control processing unit, an automatic page turning device, and a tensile testing device. The automatic page turning device and the tensile testing device are respectively connected to the control processing unit. The connection belongs to the device communication connection and can be directly connected by wires. For ease of understanding, please refer to Figure 1 , Figure 1 This is a schematic diagram of the architecture of the printed product binding quality monitoring and control system in the embodiment of the present application. The following is a detailed introduction to the hardware devices in the system: 1. Control and Processing Unit: The control and processing unit is the core of the printed product binding quality monitoring and control system. Composed of a high-performance processor and storage modules, it possesses data processing, logical judgment, and command output capabilities. Within the solution, it is responsible for collecting and analyzing sensor data such as tension, displacement, and image data; determining the type and location of binding defects; invoking algorithms to calculate repair parameters such as glue filling amount and pressure; sending instructions to actuating devices such as gluing and pressure; coordinating the automatic page turning and tension testing equipment to operate according to procedures; setting safety boundaries to prevent equipment overload; and storing historical data for quality traceability. Typically deployed in a control cabinet and connected to various devices via a communication module, it is the key to achieving closed-loop control of detection, analysis, and repair.

[0030] 2. Automatic page-turning equipment: Automatic page-turning equipment is typically placed on the side or top of a book. A motor drive module and mechanical transmission mechanism are deployed on the side, powering the page-turning motion through components such as gears and conveyor belts. A page-turning actuator, such as a robotic arm or vacuum head, is mounted above. The arm's gripper or vacuum head precisely aligns with the edge of the page, descending to the surface during operation to grasp and flip a single page. An angle sensor, also located on the robotic arm or near the page-turning area, monitors and provides feedback on the page-turning angle in real time, ensuring that each flip accurately covers a set angle, such as 30°, 60°, or 90°. This device simulates real-world use scenarios by dynamically turning pages, revealing potential defects in the binding. This device can collect data on page looseness (such as gap width), page separation (such as detachment length), and status data such as page-turning angle, speed, and number of times, for analysis of binding performance during dynamic use.

[0031] 3. Tensile testing equipment: The tensile testing equipment is arranged around the book binding. A tensile force-applying device, such as a hydraulic cylinder or electric actuator, is located outside the book's binding line. Its tensile force-applying end is fixedly connected to the edge of the book page via a robotic arm or clamp, ensuring that the tensile force is applied outward along the page. A force sensor is connected in series along the tensile force transmission path to sense and record the tensile force in real time. An angle adjustment platform is placed between the tensile force-applying device and the book, allowing for flexible adjustment of the binding's tilt angle to simulate forces at various flipping angles, such as 30°, 60°, and 90°. The overall layout of the equipment is centered around the book binding, ensuring that all components work together to precisely apply force to the binding section and collect data. The tensile testing equipment can apply outward tensile forces at different angles to the binding, monitoring the changes in tensile force in real time and recording data from the moment the force is applied to the binding, leading to loosening and fracture. Its purpose is to quantify binding quality as a mechanical indicator, accurately locating weak areas and assessing fracture risk through segmented testing. This equipment can obtain tensile strength data, including maximum bearing capacity, loosening point (critical tensile force at the beginning of loosening), breaking point (tensile force value at complete breakage), and mechanical performance data of the same section at different flipping angles, providing a basis for quantitative analysis of binding quality and risk prediction.

[0032] This application provides a method for monitoring and controlling the binding quality of printed products, which is applied to the control processing unit of a printed product binding quality monitoring and control system. For ease of understanding, the following describes the method provided in an embodiment of this application: Dynamic page flipping simulates actual usage scenarios, collects binding defect data of books at different flipping angles, and combines tensile testing to perform zoning analysis of binding areas, obtain tensile strength data, and generate a binding quality distribution map to intuitively display the firmness of each section. For sections with insufficient binding firmness, local reinforcement treatment is performed by adjusting the binding pressure and applying additional glue.

[0033] Figure 2 It is a flow chart of the method for monitoring and controlling the binding quality of printed products according to an embodiment of the present application.

[0034] See also Figure 2 The detailed description of the printed product binding quality monitoring and control method is as follows: 101. Perform a page turning operation on a book page by page by using the automatic page turning device to obtain binding defect data of the book at different turning angles, wherein the binding defect data includes loose page data and page separation data.

[0035] The control processing unit is the core of the printed product binding quality monitoring and control system, responsible for data processing and command issuance. The automatic page turning device is an automated device that simulates the manual action of turning a book. It consists of a motor and transmission mechanism, and can turn individual pages of a book one by one. Binding defect data refers to binding problems detected during the page turning process. Loose page data indicates increased gaps or looseness between pages, while page separation data indicates pages detaching from the binding. For example, when testing the binding quality of textbooks, the automatic page turning device simulates a student's daily book turning movements to monitor the page status and obtain binding defect data.

[0036] This step is performed after the printed product is bound and enters the quality inspection process. Specifically, the control processing unit issues a start command to the automatic page turning device, which then turns the book page by page according to a preset program. During the turning process, a displacement sensor monitors the status of the pages and the binding in real time. The displacement sensor is mounted on the opposite edge of the book's binding, perpendicular to the binding. For books bound on the left side, the displacement sensor is mounted above or below the right edge of the page, with the sensing end aligned with the edge. This monitors the vertical displacement of the page relative to the binding as the book is turned. A high-definition camera continuously captures the page turning footage, and an image recognition algorithm analyzes whether there are signs of looseness, such as excessive gaps or misalignment, between the pages, or whether the page edges are separating from the binding. The displacement sensor accurately measures the displacement of the pages as they are turned, determining whether any pages are abnormally loose or separated. This data is then collected and transmitted to the control processing unit for storage and preliminary analysis.

[0037] 102. Based on the thickness of the book and the binding defect data, divide the binding area into a plurality of stress-bearing sections along a direction parallel to the long side of the spine.

[0038] To more clearly show the division of multiple load-bearing sections, please refer to Figure 3 , Figure 3 This is a schematic diagram showing that the binding area is divided into multiple stress-bearing sections along a direction parallel to the long side of the spine in an embodiment of the present application.

[0039] Book thickness refers to the vertical distance from the front to the back cover, which can be measured with tools such as calipers. The binding area is the area where the pages are connected to the front and back covers. The stress-bearing sections are the sub-areas of the binding area divided according to certain rules. For example, a book with a thickness of 5 cm can be divided into sections every 2 cm, resulting in three stress-bearing sections: top (0-2 cm), middle (2-4 cm), and bottom (4-5 cm). Each stress-bearing section is assigned a unique number to facilitate subsequent targeted testing.

[0040] This step is performed after obtaining the binding defect data, and its purpose is to more accurately analyze the quality of different areas of the binding part. Specifically, the control processing unit first obtains the book thickness information, which can be pre-entered book specification data. Then, combined with the binding defect data obtained in step 101, the force distribution of the binding part is analyzed. If it is found in the binding defect data that the pages of the upper part of the book are loose more obviously, the control processing unit will divide the binding part along the direction parallel to the long side of the spine. When dividing, the thickness of the book will be referred to. For thinner books, it may be divided into two force sections; for thicker books, it may be divided into more sections. After the division is completed, each force section has its own independent number and range, which is convenient for subsequent targeted detection and analysis of different sections.

[0041] 103. Perform tension tests on the multiple stress-bearing sections respectively using the tension testing device to obtain tensile strength data of each section at different flipping angles, wherein the tension test applies outward tension to the book pages at different flipping angles.

[0042] For a clearer illustration of how the tensile test applies tension to a book, see Figure 4 , Figure 4 This is a schematic diagram of the tensile test in the embodiment of the present application, which shows the outward pulling force applied to the book pages at different flipping angles.

[0043] Tensile testing equipment is an instrument used to apply tension to multiple stress-bearing sections separately to test their tensile properties. It includes components such as a tension-applying device and a force sensor. The tensile strength data is the mechanical performance data of the binding part under tension, including the maximum tensile force, the critical tensile force at which loosening begins, and the critical tensile force at which fracture occurs.

[0044] To avoid damage to books during the tensile test, an initial tensile threshold is set before the test begins, based on the material and thickness of the book. This initial tensile threshold is used to limit the maximum tensile force range of the tensile testing equipment, ensuring that the tensile force is below the tear strength of the book pages. Within the initial tensile threshold, the tensile testing equipment gradually increases the tensile force in preset increments, controlling the magnitude of each increase. For example, starting with 0N and gradually increasing the tensile force in 1N increments, the tensile force is gradually increased. During the gradual increase in tensile force, the deformation of the book pages is monitored in real time using force sensors and displacement sensors. When the deformation of the book pages approaches a preset safety threshold, the initial tensile threshold is dynamically adjusted based on the real-time deformation data and the flip angle of the book pages. For example, the threshold is appropriately lowered at larger flip angles or increased when testing thicker books to accommodate different stress conditions. When the deformation of the book pages reaches the safety threshold, the application of tensile force is immediately stopped to avoid damage to the pages, and the relevant data is recorded for subsequent optimization of the test process, thereby ensuring the safety and accuracy of the test.

[0045] This step is performed after the binding part has completed the division of the stress sections. Specifically, the control processing unit sends instructions to the tensile testing equipment, and performs tensile tests on the multiple divided stress sections in sequence. During the test, the tensile force applying device of the tensile testing equipment applies an outward tensile force to the pages at different flipping angles, and the tensile force gradually increases from a small value. The force sensor monitors and records in real time the magnitude of the tensile force borne by each stress section, as well as the state changes of the pages and the binding part. Continue to increase the tensile force until the binding part reaches the maximum bearing force, and record the maximum force value. By performing the above-mentioned tensile test operation on each stress section at multiple different flipping angles, the control processing unit collects the tensile strength data of each stress section at different angles.

[0046] 104. Generate a binding quality distribution map based on the tensile strength data and the binding defect data, wherein the binding quality distribution map is used to display the binding firmness of different sections of the book.

[0047] Tensile strength data refers to the mechanical performance data of each stress-bearing section of the binding part at different flipping angles obtained through tensile testing equipment, including indicators such as maximum bearing capacity, loosening point and breaking point; binding defect data is information on quality problems such as loose and separated pages detected during automatic page turning; the binding quality distribution diagram presents the firmness of different stress-bearing sections of the book binding part in a visual form.

[0048] This step is performed after obtaining the tensile strength data and binding defect data. Its purpose is to convert complex data into intuitive and easy-to-understand visual information to facilitate the rapid assessment of binding quality. Specifically, the control processing unit first conducts a comprehensive analysis of the collected tensile strength data and binding defect data. Based on the tensile strength data reflecting the tensile strength bearing capacity of each stress section, combined with the looseness and separation of the book pages recorded in the binding defect data, the binding quality of each stress section is quantitatively evaluated. Based on the evaluation results, the control processing unit generates a binding quality distribution map, which intuitively presents the quality status of each stress section in the book binding area.

[0049] 105. Based on the binding quality distribution diagram, determine whether the binding firmness of each section meets the standard.

[0050] Based on the binding quality distribution map, the binding firmness of each stressed section of the book is determined to be acceptable. Specifically, the control processing unit compares the quality data of each stressed section in the binding quality distribution map, such as tensile strength and binding defects, with the preset quality standard thresholds. If the data for a section meets the standard requirements, the binding firmness of that section is determined to be "up to standard"; if the data exceeds the standard allowable range, the section is determined to be "unsatisfactory." This judgment clearly determines whether the quality status of the book's binding parts meets the standard.

[0051] If not, execute step 106; if so, execute step 107.

[0052] 106. Perform local reinforcement processing on the section with insufficient binding strength to obtain an optimized binding position, wherein the local reinforcement processing includes adjusting the binding pressure and applying glue.

[0053] This step is performed after determining that there is a section with insufficient binding firmness, and is intended to carry out targeted repairs on the section with insufficient binding firmness and improve the overall binding quality. Specifically, the control processing unit first retrieves the tensile strength data of the section with insufficient binding firmness, and conducts an in-depth analysis of the binding performance characteristics of the section under tension, such as low tensile strength. Then, combined with the tensile strength data, the amount of glue and pressure parameters required to enhance the firmness of the section are calculated. For example, if the binding of the section is not firm due to insufficient glue, a specific type of glue needs to be applied; if the strength is insufficient due to insufficient binding pressure, the appropriate pressure will be determined.

[0054] The glue dosage refers to the volume of adhesive required to enhance the binding firmness, which is calculated based on the gap width, length and adhesive viscosity coefficient of the segment; the binding pressure includes the pressure applied to the binding part (unit: N), the action time (unit: s) and the pressure distribution range, which is determined based on the tensile strength data.

[0055] Glue dosage: First obtain the gap width (such as 0.5mm), length (such as 200mm), and depth (such as 0.2mm) to calculate the gap volume as 0.5×200×0.2=0.02cm³, and then correct it according to the adhesive viscosity coefficient (penetration efficiency, viscosity grade). For example, if the penetration efficiency of porous paper is 60%, the actual dosage is 1÷60%≈0.034ml; if the strength gap is caused by insufficient adhesive, the strength gap refers to the weak area where the bonding strength of the book binding part (such as the connection between the spine and the pages) is lower than the design or usage requirements due to insufficient adhesive. Insufficient adhesive can weaken the bond between the book pages and the binding substrate (such as the spine or glue layer), creating a "gap" in the connection. For example, if the target tensile strength minus the actual tensile strength = 2 Newtons, the design or standard tensile strength (target value) of the binding area (such as the glue point) minus the actual measured tensile strength is 2 Newtons. This indicates that the current binding strength is 2 Newtons lower than the target value, indicating a strength gap. Given a unit volume adhesive strength of 5N / ml, the amount of glue to be added is 2 ÷ 5 = 0.4ml.

[0056] Binding Pressure: Binding pressure is determined based on tensile strength data. If the loosening threshold is low (e.g., 12N < the preset 15N), the pressure is considered insufficient. Based on historical data, if the loosening threshold increases by 2N for every 10N increase in pressure, the pressure gap calculation formula is: (target loosening tensile threshold - current value) / pressure - strength coefficient. Therefore, (15N - 12N) / 0.2 = 15N. Adjusted pressure = 80N (original pressure) + 15N = 95N. The default action time is 5 seconds, and the time is extended by 1 second for every 20N increase in pressure (inclusive). For example, if the adjusted pressure is 120N (a 40N increase from the original), the action time is 5 + (40N / 20N) × 1 = 7 seconds. Pressure distribution is precisely applied based on the segment location.

[0057] 107. Ensure that the binding of the book meets quality standards.

[0058] A book's binding meeting quality standards means that, after a series of tests and processing, each section of the book's binding meets pre-set quality requirements. It can withstand normal external forces such as flipping and pressing during subsequent use, and is unlikely to cause problems such as pages loosening or separating. For example, if the binding of a hardcover book, after testing and necessary processing, shows that the tensile strength and binding security of each load-bearing section meet the company's specified standards, the book's binding will be considered to have met quality standards.

[0059] When the control processing unit confirms in step 105 that the binding firmness of each section has reached the preset quality standard threshold, the control processing unit will output an instruction to determine that the binding of the book has reached the quality standard. This determination result means that the binding quality of the book meets the usage requirements.

[0060] The printed product binding quality monitoring and control method described in the present application utilizes an automatic page-turning device to simulate real-world usage scenarios, acquiring binding defect data. Combined with a tensile testing device, the method then integrates data to generate a binding quality distribution map, accurately identifying and repairing areas with insufficient binding strength. This method achieves dynamic, comprehensive monitoring and precise control of printed product binding quality. This method not only addresses the existing problem of relying solely on static image detection, which fails to reflect subsequent performance degradation of binding areas, but also ensures the structural stability and durability of printed products over the long term through zoning detection and targeted enhancement processing, significantly improving the accuracy and comprehensiveness of binding quality detection.

[0061] The present application also provides another method for monitoring and controlling the binding quality of printed products, which is applied to the control processing unit of the binding quality monitoring and control system of printed products. The following describes another method provided by an embodiment of the present application: the binding defect data of the book at different turning angles is obtained by an automatic page turning device, and the binding part is divided into multiple stress sections in combination with the thickness of the book. Each section is tested using a tensile testing device to calculate the tensile strength, loosening point and breaking point, generate tensile strength data, classify the binding quality based on the degree of looseness and the risk of breakage, and generate a binding quality distribution map to determine whether the firmness meets the standards. If there are sections that do not meet the standards, the glue dosage and pressure parameters are adjusted according to the tensile strength data, local enhancement treatment is performed, and re-inspection and quality change curve optimization adjustment are carried out to ensure that the binding part reaches a qualified quality state.

[0062] Figure 5 This is another flow chart of the method for monitoring and controlling the binding quality of printed products according to the embodiment of the present application.

[0063] See also Figure 5 Another method for monitoring and controlling the binding quality of printed products is described in detail as follows: 201. Perform a page-by-page flipping operation on a book using the automatic page-turning device to obtain binding defect data for the book at different flipping angles. The binding defect data includes loose pages and separated pages. (This step has been described in 101 and will not be repeated here.) 202. Based on the thickness of the book and the binding defect data, divide the binding area into multiple stress-bearing sections along a direction parallel to the long side of the spine. (This step has been described in 102 and will not be repeated here.) 203. Perform a tensile test on each of the plurality of stress-bearing sections using the tensile testing device to obtain a tensile strength of each stress-bearing section, where the tensile strength is a maximum bearing capacity of the binding portion of the book under tension.

[0064] Tensile strength indicates the maximum bearing capacity of the binding part under tension (unit: N), and is the core mechanical indicator for measuring the firmness of binding.

[0065] The control processing unit sends a zoned test command to the tensile testing equipment, applying an outward tensile force at different flipping angles (e.g., 30° and 60°, simulating actual page flipping) to each stressed section. The tensile force starts at 0N and increases in increments of 1N, while a displacement sensor monitors the movement of the pages. When the pages begin to visibly loosen, the tensile force at that point is recorded as the initial loosening force. The tensile force is then increased until the pages break at the binding, and the maximum tensile force is recorded as the tensile strength of that section. The control processing unit generates independent tensile strength data for each section, such as "Top section: tensile strength 20N, initial loosening force 15N."

[0066] 204. Based on the tensile strength and the different flipping angles, the loosening point and the breaking point of each stressed section are calculated, wherein the loosening point is the critical value at which the stressed section begins to loosen after the tensile force is applied, and the breaking point is the critical value at which the stressed section breaks after the tensile force is applied.

[0067] The tensile strength is the maximum bearing capacity of the binding measured in step 203. Different flip angles refer to the angles between the pages and the spine during the tensile test (e.g., 30°, 60°, and 90°), which are used to simulate the stress experienced during actual flipping. The loosening point represents the critical value (in N) at which the stressed section begins to loosen irreversibly under tension, i.e., the minimum tensile force required for the page to shift noticeably from a static state. The breaking point represents the critical value (in N) at which the stressed section undergoes structural fracture under tension, i.e., the tensile force at which the page completely separates from the binding. For example, if the tensile strength of a section at a 60° flip angle is 25 N, the loosening point is 18 N, and the breaking point is 25 N, this means that the section begins to loosen when the tensile force exceeds 18 N and breaks when the force exceeds 25 N.

[0068] Based on the tensile test data recorded in step 203, the control processing unit analyzes the relationship between force and displacement for each section at different flipping angles. The loosening point is determined by setting a displacement threshold (e.g., 0.3mm): when the tensile force increases to a certain value, the page displacement exceeds the threshold and cannot return to its original position, this value is the loosening point. The breaking point is directly based on the tensile strength value. That is, when the tensile force reaches the tensile strength, the binding part breaks due to being unable to withstand the external force. The control processing unit generates corresponding loosening point and breaking point data for each section and each flipping angle, such as "Middle section (30°): loosening point 12N, breaking point 22N."

[0069] 205. Based on the tensile strength, the loose point, and the breaking point, generate tensile strength data of each section at different flipping angles.

[0070] Tensile strength data is a comprehensive mechanical data set that integrates tensile strength, loosening point, breaking point, and corresponding flip angle. It is used to comprehensively describe the performance of binding parts under dynamic load scenarios. For example, the tensile strength data of a certain load section can be expressed as: "Flip angle 60°, tensile strength 20N, loosening point 15N, breaking point 20N", which directly reflects the load limit and critical risk point of this section at that angle.

[0071] The control processing unit correlates and matches tensile strength, loosening points, and breaking points according to the load-bearing segments and flip angles. For each flip angle in each segment, a data set containing three core indicators is generated and stored in the system database. For example, three tensile strength data records are generated for each of the three flip angles (30°, 60°, and 90°) of the bottom segment.

[0072] 206. Based on the tensile strength data and the binding defect data, evaluate the looseness and breakage risk of the multiple stress-bearing sections.

[0073] Tensile strength data includes the tensile strength, loosening point, and breaking point of each section at different angles. Binding defect data includes page loosening and separation data. The degree of loosening is a quantitative assessment of the loose state of the pages, calculated based on the ratio of the loosening point to the actual force applied or the gap index in the binding defect. The risk of fracture is an assessment of the likelihood of fracture in the binding area, determined based on information such as the tensile strength and breaking point in the tensile strength data. For example, if the loosening point of a stressed section is low and the binding defect data shows a large gap between the pages, then the degree of loosening can be preliminarily judged to be high. If the tensile strength is close to the breaking point, or the breaking point value is relatively low, it means the risk of fracture is high.

[0074] This step is performed after the tensile strength data is generated. Its significance lies in conducting an in-depth assessment of the binding quality from two dimensions: mechanical properties and actual defect manifestations. Specifically, the control processing unit first compares various indicators in the binding defect data, such as the width of the gap between the pages and the length of the separation between the pages and the binding, with a pre-set normal range. If the width of the gap between the pages exceeds the normal range (for example, the normal range is set to within 0.2mm, and the actual measured value reaches 0.4mm), it indicates a certain degree of looseness. At the same time, combined with the loose point information in the tensile strength data, if the actual tensile force is close to or exceeds the loose point, then the degree of looseness is further confirmed to be high. To assess the risk of fracture, the control processing unit analyzes the difference between the tensile strength and the breaking point in the tensile strength data, as well as the magnitude of the tensile force that may be experienced in actual use. If the difference between the tensile strength and the breaking point of a certain stress-bearing section is small, and the tensile force under simulated usage scenarios is likely to approach the breaking point, then the risk of fracture in this area is determined to be high. Through such comprehensive analysis, the control and processing unit generates an assessment result on the degree of looseness and fracture risk for each stressed section.

[0075] 207. Based on the looseness degree and the breakage risk, classify the binding qualities of the multiple stress-bearing sections to obtain binding quality grades, where the binding quality grades include a qualified grade and a weak grade.

[0076] The method specifically includes steps 2071 to 2075, which are not shown in the figure.

[0077] 2071. Based on the degree of looseness, preliminarily determine the binding quality level.

[0078] The degree of looseness is a quantitative assessment of the stability of the binding (e.g., slightly loose, significantly loose) by combining binding defect data (e.g., gap width, separation length) with the loose point in the tensile strength data. For example, if the gap width in a certain section reaches 0.5mm and is close to the tensile strength value of the loose point, it is judged as "significantly loose."

[0079] This step, performed after the looseness assessment in step 206, serves as the initial screening criteria for binding quality classification. Specifically, the control processing unit compares the looseness of each stressed section with a preset "looseness threshold" (e.g., a gap width > 0.3mm). If the looseness does not exceed the threshold, the process proceeds to step 2072 for further evaluation. If the looseness exceeds the threshold (e.g., a gap width of 0.6mm), the binding quality of that section is directly classified as weak, eliminating the need for subsequent breakage risk assessment, thereby improving detection efficiency.

[0080] 2072. If the degree of looseness does not reach a preset looseness threshold, further determine the binding quality level based on the breakage risk.

[0081] Fracture risk assesses the likelihood of structural fracture in a binding based on the match between the tensile strength and fracture point in the tensile strength data and the actual stress scenario (e.g., risk factor = actual maximum force / tensile strength). For example, if a section experiences a maximum force of 18N and a tensile strength of 20N during daily use, and the risk factor reaches 0.9 (close to the fracture point), it is considered "high fracture risk."

[0082] This step, triggered when the looseness level is determined to be below the standard in step 2071, is used to eliminate the hidden quality issue of "low looseness but high risk." Specifically, the control processing unit retrieves the tensile strength data for the section and calculates the fracture risk coefficient (with a preset safety threshold of 0.8). If the risk coefficient is ≥ 0.8 (e.g., the calculated value is 0.85), the process proceeds to step 2073; if the risk coefficient is < 0.8 (e.g., the calculated value is 0.6), the process proceeds to step 2074.

[0083] 2073. If the breakage risk reaches a preset breakage critical value, the binding quality level is determined to be a weak level.

[0084] The fracture threshold is a preset risk factor threshold (e.g., 0.8) used to determine whether a binding section has a risk of fracture. For example, if a section has a fracture risk factor of 0.85, exceeding the critical value of 0.8, it indicates that it may fail during normal use due to external forces approaching the fracture point.

[0085] Based on the comparison result of the fracture risk coefficient and the critical value, the control processing unit will mark the quality grade of the section as weak grade if the "risk coefficient ≥ critical value" condition is met (such as the calculated value is 0.9), and record the specific risk cause (such as "insufficient tensile strength, close to the fracture point").

[0086] 2074. If the breakage risk does not reach a preset breakage critical value, determine that the binding quality grade is a qualified grade.

[0087] The control processing unit confirms that the fracture risk coefficient of the section is less than the critical value (such as the calculated value is 0.7) and the degree of looseness is within the safe range (such as the gap width is 0.2mm), then the binding quality grade is determined to be qualified, indicating that the section can withstand external forces in normal use and is not prone to loosening or breaking.

[0088] 2075. If the degree of looseness reaches a preset looseness critical value, the binding quality level is determined to be a weak level.

[0089] If a section is determined in step 2071 to have "looseness reaching a critical value" (e.g., the length of the separated pages exceeds 1 cm), it is directly marked as weak regardless of its breakage risk, to avoid missing serious defects due to over-reliance on mechanical data.

[0090] 208. Generate a binding quality distribution map based on the binding quality level.

[0091] The binding quality grade is the quality status of each section (qualified grade, weak grade) obtained through hierarchical judgment in step 207. The binding quality distribution diagram presents the quality status of the book binding parts in a visual form. Green blocks can also be used to represent qualified grade sections, and red blocks can be used to represent weak grade sections.

[0092] The control processing unit uses a graphics rendering algorithm to generate a two-dimensional distribution map based on the location and quality level of each stress-bearing section. For example, for a book divided into top, middle, and bottom sections, the corresponding locations in the distribution map are filled with different colors: the top section is red (weak), the middle section is green (acceptable), and the bottom section is red (weak). The distribution map can be overlaid with binding defect data (such as the location of loose gaps) and mechanical data (such as tensile strength values) to form a multi-dimensional quality assessment view.

[0093] 209. Based on the binding quality distribution diagram, determine whether the binding firmness of each section meets the standard.

[0094] The method specifically includes steps 2091 to 2093, which are not shown in the figure.

[0095] 2091. Based on the binding quality distribution diagram, compare the binding qualities of the multiple force-bearing sections with a preset quality standard threshold to obtain a comparison result.

[0096] Pre-set quality thresholds are quantitative standards set according to industry specifications or company requirements, such as "tensile strength ≥ 18N" and "page loose gap width ≤ 0.3mm." Binding quality reflects the actual mechanical properties (such as tensile strength) and defect indicators (such as gap width) of each stressed section. Comparison results record the match between each section's actual indicators and thresholds, such as "meets standard" or "does not meet standard." For example, if a section's tensile strength is 15N (below the threshold of 18N) and its loose gap width is 0.4mm (above the threshold of 0.3mm), the comparison result would be "does not meet standard."

[0097] The control processing unit extracts data such as the tensile strength and loose gap width of each stressed section from the distribution map and compares them against preset thresholds. If the tensile strength is ≥18N and the gap width is ≤0.3mm, the section is marked as "meeting the standard." If any of the indicators are not met, the section is marked as "not meeting the standard." For example, if the tensile strength of the top section is 20N (meeting the standard) and the gap width is 0.2mm (meeting the standard), the comparison result is "meeting the standard." However, if the tensile strength of the bottom section is 16N (not meeting the standard) and the gap width is 0.5mm (not meeting the standard), the comparison result is "not meeting the standard."

[0098] 2092. Based on the comparison results, calculate the binding firmness score of each section.

[0099] The comparison results are the matching conclusions between the quality indicators of each section and the thresholds in step 2091. The binding strength score is a numerical scoring system that converts the comparison results into a numerical value using quantitative rules. Each indicator that meets the standard is assigned 20 points, and each indicator that fails to meet the standard is assigned 0 points, with a maximum score of 60 points (assuming three indicators are included). For example, if a section meets all three indicators, the score is 60 points; if a section meets the standard for two indicators and fails for one, the score is 40 points.

[0100] The control processing unit assigns points to the comparison results of each section according to the preset scoring rules: if the tensile strength, looseness and fracture risk all meet the standards, 20 points are assigned respectively, for a total of 60 points; if the tensile strength does not meet the standards (0 points) and the other two items meet the standards (20 points each), the total is 40 points.

[0101] 2093. Based on the binding firmness score, determine whether the binding firmness of each section meets the standard.

[0102] The passing threshold is a preset passing score (e.g., 40 points) used to determine whether a segment meets quality requirements. For example, a score of 40 points or higher is considered "passing the standard," while a score below 60 points is considered "not meeting the standard."

[0103] 210. If not, retrieve the tensile strength data of the section where the binding firmness is insufficient.

[0104] "If no," it indicates that the binding strength score of a particular stressed section, as determined in step 2093, failed to meet the pre-determined threshold. A section with insufficient binding strength is identified as requiring repair. The tensile strength data includes mechanical performance indicators such as the section's maximum bearing capacity, loosening point, and breaking point at different flip angles. For example, if the bottom section scores 40 points (below the qualifying threshold of 60 points), the control processing unit will retrieve the tensile strength data for that section at angles of 30°, 60°, and 90° to analyze its mechanical weaknesses.

[0105] Based on the "non-compliant" result in step 2093, the control processing unit locates the unique identifier of the corresponding section (such as "bottom section-03") and retrieves the complete tensile strength data of the section from the system database, including the force and displacement curve recorded during the tensile test, the mechanical critical values ​​at different angles, etc., to form a mechanical performance file for the section, providing a basis for the subsequent calculation of repair parameters.

[0106] 211. Calculate glue usage and pressure parameters based on the tensile strength data to generate adjustment data.

[0107] Glue usage refers to the volume of adhesive required to enhance the binding firmness, which is calculated based on the gap width, length and adhesive viscosity coefficient of the segment; pressure parameters include the pressure applied to the binding part (unit: N), action time (unit: s) and pressure distribution range, which are determined based on the maximum bearing force and loosening point in the tensile strength data; adjustment data is a set of instructions that integrate glue usage and pressure parameters.

[0108] The control processing unit analyzes the retrieved tensile strength data. If the break point is low (e.g., 12N), the binding pressure is considered insufficient and the required pressure is calculated (e.g., from 80N to 120N). If the difference between the breaking point and the maximum bearing force is small (e.g., 2N), the adhesive is insufficient and the amount of additional glue to be applied is calculated (e.g., 0.3ml). This ultimately generates adjustment data with specific values, such as "glue amount: 0.3ml, pressure parameter: 120N / 5s."

[0109] 212. Based on the adjustment data, enhance the section with insufficient binding firmness to obtain an optimized binding position.

[0110] Reinforcement treatment refers to improving the binding firmness of the section by reapplying glue, adjusting the binding pressure, etc.; the optimized binding part must meet the preset quality standards (such as tensile strength ≥18N, gap width ≤0.3mm).

[0111] After receiving the adjustment data, the binding machine completes the repair process by precisely spraying adhesive into gaps or areas of adhesive failure, based on the glue dosage specified in the adjustment data. A pressure device then applies a preset pressure to the area, allowing the adhesive to fully penetrate and cure, while also tightening the connection between the page and the binding. After the process is complete, the control unit records the operation log, including the time of the process, the type of glue used, and the pressure parameters, for easy traceability.

[0112] 213. Re-inspect the optimized binding position to obtain re-inspection data.

[0113] Re-inspection involves retesting the reinforced section for tensile strength and defects. Re-inspection data includes tensile strength, loosening points, breaking points, and gap widths. For example, a re-inspection of the optimized bottom section revealed a tensile strength of 20N and a gap width of 0.2mm, both meeting standards.

[0114] The control processing unit instructs the tensile testing equipment and the automatic page turning equipment to re-perform tensile testing and binding defect detection on the optimized section to obtain new binding defect data and maximum bearing force, loosening point and breaking point.

[0115] 214. Compare the re-inspection data with the tensile strength data to obtain a quality change curve.

[0116] The retest data is the mechanical performance indicators (such as tensile strength and loose points) and binding defect data (such as gap width) obtained from retesting the optimized binding area in step 213. The tensile strength data is the original mechanical data of the insufficiently secure binding section retrieved in step 210 (i.e., the baseline data before the enhancement treatment). The quality change curve is a coordinate graph showing the changing trends of quality indicators before and after the enhancement treatment. The horizontal axis usually represents the test item (such as tensile strength and gap width), and the vertical axis represents the value. A broken line connects the data points before and after the enhancement to form a curve. For example, the original tensile strength of the bottom section (16N) (before enhancement) and the retested tensile strength of 20N (after enhancement) are marked on the coordinate graph, and the connecting lines form a curve reflecting the strength improvement.

[0117] Specifically, the control processing unit extracts the corresponding indicators from the re-inspection data and the original tensile strength data one by one, such as: original tensile strength (before reinforcement): 16N, re-inspected tensile strength (after reinforcement): 20N, original gap width: 0.5mm, re-inspected gap width: 0.2mm, and marks these data points in a two-dimensional coordinate system to obtain a quality change curve, which includes a tensile strength change curve and a gap width change curve.

[0118] 215. Determine the enhancement effect based on whether the slope value of the mass change curve reaches a preset slope threshold.

[0119] The slope value is the inclination of the line connecting the data points in the quality change curve and is used to quantify the degree of quality improvement. The calculation formula is: Slope = (Retest Data Value - Original Data Value) / Original Data Value × 100%. For example, if the tensile strength increases from 16N to 20N, the slope value is (20 - 16) / 16 × 100% = 25%, indicating a 25% improvement in quality. If the gap width decreases from 0.5mm to 0.2mm, the slope value is (0.2 - 0.5) / 0.5 × 100% = -60%, indicating a 60% decrease in gap width (the negative sign indicates a decrease in the value, indicating a narrowing of the gap width).

[0120] 216. If so, it is determined that the optimized binding position has qualified binding quality.

[0121] Preset slope thresholds are quality improvement standards set based on the type of printed product and usage scenario (e.g., tensile strength improvement ≥ 20%, gap width reduction ≥ 50%), used to determine whether the enhancement process has achieved the desired effect. For example, for frequently used dictionaries, the tensile strength improvement threshold is set at 25%. If the slope value of a certain section is 25% or higher, the binding quality is considered acceptable.

[0122] The control processing unit compares the slope of the quality change curve with a preset threshold. If the tensile strength of the bottom section increases by 25% (reaching the threshold) and the gap width decreases by 60% (exceeding the threshold), the section is deemed qualified through the enhancement process and no further adjustments are required. The control processing unit then marks the section's quality status as acceptable and updates the quality record in the system database.

[0123] 217. If not, modify the adjustment data according to the quality change curve to obtain new adjustment data, and return to perform the enhancement processing step.

[0124] Data correction involves adjusting repair parameters such as glue dosage and pressure based on the performance gaps reflected in the quality change curve. For example, if the tensile strength improvement slope is only 10% (below the 20% threshold), the control processing unit will analyze the curve and determine whether to increase the glue dosage or extend the pressure application time. This step is executed when the reinforcement effect is determined to be substandard, forming a closed-loop quality control process. The specific process is as follows: Gap analysis: The control processing unit extracts substandard indicators from the quality change curve (such as insufficient improvement in tensile strength), compares the original data with the re-inspection data, and determines the size of the performance gap (such as 2N short of the threshold).

[0125] Parameter correction: Adjust the repair parameters according to the type of gap. For example, if the strength is insufficient due to insufficient adhesive, increase the glue dosage from 0.3ml to 0.5ml; if the curing is insufficient due to a short pressure application time, extend the pressure duration from 5 seconds to 8 seconds.

[0126] Reprocessing: Generate corrected adjustment data (such as "glue amount: 0.5 ml, pressure parameter: 120 N / 8 s"), return to step 212 and re-perform enhancement processing on the segment until the slope value reaches the preset threshold.

[0127] 218. If yes, then determine that the binding of the book meets the quality standard. (This step has been described in 107 and will not be repeated here.) The printed product binding quality monitoring and control method described in the embodiments of this application uses an automatic page-turning device to simulate a real-world page-turning scenario to acquire dynamic binding defect data. Combined with a tensile testing device, the binding area is segmented and quantified for mechanical properties (tensile strength, loose points, and breakage points). Data integration generates a binding quality distribution map, classifies quality levels, and repairs weak sections in a targeted manner. This enables full-process dynamic monitoring, precise assessment, and closed-loop optimization control of printed product binding quality. This method not only addresses the problem of traditional static image detection failing to reflect binding performance degradation during use, but also significantly improves binding quality detection accuracy and repair efficiency through segmented detection and data-driven local enhancement processing, ensuring the structural stability and durability of printed products over long-term use and enhancing the accuracy and comprehensiveness of binding quality detection.

[0128] The method provided in the above embodiment can be executed by the control processing unit of the printed product binding quality monitoring and control system. The following describes the control processing unit in the embodiment of the present invention from the perspective of hardware processing. Figure 6 , is a hardware structure diagram of the control processing unit in an embodiment of the present application.

[0129] It should be noted that Figure 6 The structure of the control processing unit shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0130] like Figure 6 As shown, the control processing unit includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 602 or programs loaded from a storage unit 608 into a random access memory (RAM) 603, such as executing the methods described in the above embodiments. The RAM 603 also stores various programs and data required for system operation. The CPU 601, the ROM 602, and the RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0131] The following components are connected to the input / output (I / O) interface 605: an input section 606 including an audio input device, push button switches, and the like; an output section 607 including a display, an audio output device, indicator lights, and the like; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card or a modem. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the input / output (I / O) interface 605 as needed. Removable media 611, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 610 as needed, so that computer programs read from the media can be installed in the storage section 608 as needed.

[0132] In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, an embodiment of the present invention includes a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for executing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 609 and / or installed from removable media 611. When executed by the central processing unit (CPU) 601, the computer program performs the various functions defined in the present invention.

[0133] It should be noted that specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0134] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present invention. Each box in the flowchart or block diagram can represent a module, program segment, or part of the code, and the above-mentioned module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings.

[0135] Specifically, the control processing unit of this embodiment includes a processor and a memory, the memory is coupled to one or more processors, the memory is used to store computer program code, the computer program code includes computer instructions, and one or more processors call the computer instructions to enable the control processing unit to execute the method provided by the above embodiment.

[0136] As another aspect, the present invention further provides a computer-readable storage medium, which may be included in the control processing unit described in the above embodiments, or may exist independently and not incorporated into the control processing unit. The storage medium carries one or more computer programs, which, when executed by a processor of the control processing unit, cause the control processing unit to implement the methods provided in the above embodiments.

[0137] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0138] As used in the above embodiments, the term “when” may be interpreted to mean “if” or “after” or “in response to determining that” or “in response to detecting that”, depending on the context. Similarly, the phrases “upon determining that” or “if (stated condition or event) is detected” may be interpreted to mean “if determining that” or “in response to determining that” or “upon detecting (stated condition or event)” or “in response to detecting (stated condition or event)”, depending on the context.

[0139] In the above embodiments, all or part of the embodiments can be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., a floppy disk, hard disk, tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive).

[0140] Those skilled in the art will appreciate that all or part of the process steps in the above-described method embodiments can be implemented by a computer program instructing the relevant hardware. The program can be stored in a computer-readable storage medium, and when executed, the program can include the process steps in the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A method for monitoring and controlling the binding quality of printed products, characterized in that: A control processing unit applied to a printed product binding quality monitoring and control system, wherein the printed product binding quality monitoring and control system further comprises an automatic page turning device and a tensile testing device, wherein the automatic page turning device and the tensile testing device are respectively connected to the control processing unit, and the method comprises: Performing a page-turning operation on a book one by one by using the automatic page-turning device to obtain binding defect data of the book at different turning angles, wherein the binding defect data includes loose page data and page separation data; Based on the thickness of the book and the binding defect data, dividing the binding area into a plurality of stress-bearing sections along a direction parallel to the long side of the spine; Performing a tensile test on each of the plurality of stress-bearing sections using the tensile testing device to obtain tensile strength data of each stress-bearing section at different flipping angles, wherein the tensile test applies an outward tensile force to the book pages at different flipping angles; generating a binding quality distribution map based on the tensile strength data and the binding defect data, wherein the binding quality distribution map is used to display the binding firmness of different sections of the book; Based on the binding quality distribution map, determining whether the binding firmness of each section meets the standard; If not, perform local reinforcement processing on the section with insufficient binding strength to obtain an optimized binding position, wherein the local reinforcement processing includes adjusting the binding pressure and applying glue; If so, it is determined that the binding of the book meets the quality standards.

2. The method according to claim 1, characterized in that The tensile testing device is used to perform tensile tests on the multiple stress-bearing sections respectively to obtain tensile strength data of each stress-bearing section at different flipping angles, specifically including: Performing a tensile test on each of the plurality of stress-bearing sections using the tensile testing device to obtain a tensile strength of each stress-bearing section, wherein the tensile strength is the maximum bearing capacity of the binding portion of the book under the action of tension; Based on the tensile strength and the different flipping angles, calculating the loosening point and the breaking point of each stressed section, wherein the loosening point is the critical value at which the stressed section begins to loosen after the tensile force is applied, and the breaking point is the critical value at which the stressed section breaks after the tensile force is applied; Based on the tensile strength, the loosening point and the breaking point, tensile strength data of each stress-bearing section at different flipping angles are generated.

3. The method according to claim 1, characterized in that Generating a binding quality distribution map based on the tensile strength data and the binding defect data specifically includes: Based on the tensile strength data and the binding defect data, evaluating the looseness and breakage risk of the plurality of stress-bearing sections; Based on the looseness degree and the breakage risk, the binding quality of the multiple stress-bearing sections is classified to obtain binding quality grades, wherein the binding quality grades include a qualified grade and a weak grade; Based on the binding quality levels, a binding quality distribution map is generated.

4. The method according to claim 3, characterized in that Based on the looseness degree and the breakage risk, the binding quality of the multiple stress-bearing sections is classified to obtain a binding quality grade, specifically including: Based on the degree of looseness, a preliminary judgment is made on the binding quality grade; If the looseness does not reach the preset looseness threshold, further determining the binding quality level based on the breakage risk; If the breakage risk reaches a preset breakage critical value, the binding quality level is determined to be a weak level; If the breakage risk does not reach the preset breakage critical value, determining the binding quality level as a qualified level; If the looseness reaches a preset looseness threshold, the binding quality level is determined to be a weak level.

5. The method according to claim 1, wherein Based on the binding quality distribution map, determining whether the binding firmness of each section meets the standard specifically includes: Based on the binding quality distribution diagram, the binding quality of the plurality of force-bearing sections is compared with a preset quality standard threshold to obtain a comparison result; Based on the comparison results, calculating the binding firmness score of each section; Based on the binding firmness score, it is determined whether the binding firmness of each section meets the standard.

6. The method according to claim 1, characterized in that The performing of local enhancement processing on the section with insufficient binding firmness to obtain an optimized binding portion specifically includes: Retrieve the tensile strength data of the section where the binding firmness is insufficient; Calculating glue dosage and pressure parameters based on the tensile strength data to generate adjustment data; Based on the adjustment data, the section with insufficient binding firmness is enhanced to obtain an optimized binding position.

7. The method according to claim 6, characterized in that After the step of enhancing the section with insufficient binding firmness based on the adjustment data to obtain an optimized binding portion, the method includes: Re-inspecting the optimized binding part to obtain re-inspection data; comparing the re-inspection data with the tensile strength data to obtain a quality change curve; and determining an enhancement effect based on whether a slope value of the quality change curve reaches a preset slope threshold; If so, the optimized binding position is determined to be of qualified binding quality; If not, the adjustment data is corrected according to the quality change curve, and the process returns to the enhancement processing step.

8. A printed product binding quality monitoring and control system, characterized in that: It includes a control processing unit, an automatic page turning device, and a tension testing device, wherein the automatic page turning device and the tension testing device are respectively connected to the control processing unit; The control processing unit includes one or more processors and a memory; The memory is coupled to the one or more processors, and is configured to store computer program codes, where the computer program codes include computer instructions. The one or more processors call the computer instructions to enable the control processing unit to execute the method according to any one of claims 1 to 7.

9. A computer-readable storage medium comprising instructions, characterized in that: When the instruction is executed on a control processing unit, the control processing unit is caused to execute the method according to any one of claims 1 to 7.

10. A computer program product, characterized in that When the computer program product is run on a control processing unit, the control processing unit is caused to perform the method according to any one of claims 1 to 7.

Images