A certificate of deposit production line with automatic sorting and sampling inspection functions and its working method

Abstract

This invention belongs to the field of automated production technology of financial instruments, specifically involving a deposit certificate production line with automatic book-splitting and sampling inspection functions and its working method. It effectively overcomes the defects of low book-splitting accuracy, poor adaptability and quality inspection lag in the existing technology, and realizes a high degree of automation, intelligence and high reliability of the entire deposit certificate book-splitting production process.

Description

Technical Field

[0001] This invention belongs to the field of automated production technology of financial instruments, specifically relating to a deposit certificate production line with automatic book-splitting and sampling inspection functions and its working method. Background Technology

[0002] In existing technologies, the book-splitting process in certificate production generally suffers from bottlenecks in accuracy and adaptability. Traditional semi-automatic or mechanical book-splitting mainly relies on fixed-gap separation devices or manual judgment based on experience. Since the actual thickness of the certificates fluctuates slightly due to paper, ink, and environmental factors, the fixed book-splitting gap cannot dynamically adapt to these changes, easily leading to multiple or fewer certificates being separated, affecting product consistency. Furthermore, these methods are essentially open-loop controls, lacking the ability to self-correct in real time based on the actual book-splitting results. Therefore, their reliability and stability are insufficient when facing complex operating conditions.

[0003] Meanwhile, the quality sampling inspection process during production is often disconnected from the core document sorting process. The conventional approach is to conduct offline sampling or perform defect scanning on individual documents at other workstations. This is not only inefficient but also fails to verify the critical integrity of individual documents (such as the total number of documents being correct and the serial numbers within the document being consecutive) within the production cycle. When sorting errors or content defects are discovered, the problematic products have often already entered subsequent processes, leading to high error correction costs and disruptions to production continuity. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art by providing a certificate of deposit production line with automatic sorting and sampling functions, and its working method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A certificate production line with automatic sorting and sampling functions includes a sequentially arranged conveying unit, sorting unit, inspection unit, and packaging unit; wherein: The conveying unit includes a conveyor belt and a transmission system for conveying a preset number of stacks of deposit certificates to the sub-unit; wherein, the conveyor belt is uniformly provided with anti-slip ridges; The sorting unit includes a support frame spanning the conveyor belt and a sorting sheet disposed on the top crossbeam of the support frame; the sorting sheet is an elastic sheet with a curved bottom edge, the sorting sheet is perpendicular to the conveyor belt and the distance between the sorting sheet and the conveyor belt is adjustable; wherein, the distance between the bottom of the sorting sheet and the conveyor belt is adaptively adjusted based on the average thickness of the current batch of deposit certificates and dynamic compensation parameters. The detection unit is used to acquire images of the first page of the deposit certificate output by the certificate unit, and perform defect detection based on the acquired images and a preset image recognition algorithm to achieve random inspection of the deposit certificates.

[0006] Furthermore, the sorting unit, based on the friction of the conveyor belt against the stack of deposit certificates to be sorted and the reaction force of the sorting sheet against the stack of deposit certificates, combined with the pre-set anti-slip protrusions on the conveyor belt and the distance between the bottom of the sorting sheet and the conveyor belt, realizes the sorting of a preset number of deposit certificates at the bottom of the stack of deposit certificates.

[0007] Furthermore, the substrate sheet is connected to the top crossbeam of the support frame via an electric screw lifting mechanism, and the screw nut of the electric screw lifting mechanism is fixedly connected to the substrate sheet via a connecting plate.

[0008] Furthermore, the distance between the bottom edge of the document and the conveyor belt is adapted to the thickness of the single document.

[0009] Preferably, the distance between the bottom edge of the substrate and the conveyor belt is adaptively set, specifically using the following formula: in, For spacing, The average thickness of the current batch of deposit certificates is obtained through online detection. The preset number of single-book deposit slips, For dynamic compensation parameters, This is the preset compensation step size.

[0010] Furthermore, the spacing between adjacent anti-slip protrusions is adapted to the width of the deposit slip.

[0011] Furthermore, the detection unit includes an integrated image sensor, a laser displacement sensor, and a processor, and specifically performs the following processing steps: Based on the acquired deposit slip image, the number of the deposit slip on the first page of the current deposit slip book is obtained through OCR technology, and combined with the number of the deposit slip on the first page of the deposit slip book obtained in the previous book splitting, the number of deposit slips in the current deposit slip book is determined; Based on the laser displacement sensor, the thickness of the current deposit slip book is determined, and combined with the average thickness of the deposit slips, the number of deposit slips in the current deposit slip book is determined; When the two determined numbers of deposit slips are consistent and both are equal to the preset number of deposit slips in a single book, the next book splitting operation is performed; otherwise, the pipeline is paused and an alarm is issued.

[0012] Preferably, the detection unit is also used to obtain attribute data on the certificate through OCR technology and compare it with the attribute data pre-stored during the printing process. When the comparison result is incorrect, the production line is paused and an alarm is issued.

[0013] A method for operating a certificate of deposit production line with automatic sorting and sampling functions, based on the aforementioned certificate of deposit production line with automatic sorting and sampling functions, the method comprising: Based on the average thickness of the current batch of deposit certificates and the preset number of deposit certificates per book, initialize the gap height between the book sheet and the conveyor belt; The stack of deposit certificates with a preset number of certificates is transported by a conveyor belt and then divided into separate units. Based on the detection unit, the deposit certificates are randomly sampled after being divided into separate volumes, and the qualified deposit certificates are then packaged. The distance between the bottom of the substrate and the conveyor belt is adaptively adjusted based on the monitoring results of the detection unit.

[0014] Preferably, the spacing between the bottom edge of the split sheet and the conveyor belt is adaptively adjusted, specifically using the following formula: in, For spacing, The average thickness of the current batch of deposit certificates is obtained through online detection. The preset number of single-book deposit slips, For dynamic compensation parameters, This is the preset compensation step size.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: (1) The present invention provides a certificate of deposit production line with automatic sorting and sampling functions and its working method, which effectively overcomes the defects of low sorting accuracy, poor adaptability and quality inspection lag in the prior art, and realizes a high degree of automation, intelligence and high reliability of the entire process of certificate of deposit sorting production.

[0016] (2) The solution described in this invention constructs a stable physical separation environment through the coordinated action of a precisely adjustable separation sheet and a conveyor belt with anti-slip ridges. The height of the separation gap in the solution described in this invention is not a fixed value, but is set and closed-loop adjusted using an adaptive algorithm based on the average thickness of the current batch of deposit slips and dynamic compensation parameters. This algorithm can sense and compensate for separation errors caused by factors such as paper thickness fluctuations and friction changes in real time, thereby ensuring that a preset number of deposit slips can be separated stably and accurately under different production batches and working conditions, completely eliminating the dependence on manual experience and realizing the standardization and unmanned operation of the separation process.

[0017] (3) The solution described in this invention integrates the detection unit directly after the sorting unit, enabling immediate, non-contact sampling inspection of newly sorted certificate books. This detection unit is not a simple defect scan, but rather performs dual verification of a single certificate book by integrating OCR recognition and laser thickness measurement technology: firstly, it indirectly verifies the number of sheets in the book by recognizing the continuity of the first page numbers of adjacent certificate books; secondly, it directly verifies the number of sheets by measuring the physical thickness. By combining these two methods and comparing them with preset values, the system can determine with a very high degree of confidence whether the sorting is correct. Simultaneously, OCR technology can also perform secondary sampling inspection of the printed content. Once an error in the number of sheets or a content defect is detected, the system can immediately pause the production line and issue an alarm, achieving real-time interception and handling of quality problems at the source of production, greatly reducing subsequent rework costs and quality risks.

[0018] (4) The combination of the anti-slip ridge design and the liftable separator in the solution described in this invention solves the traditional contradiction between conveying stability and separator accuracy; the electric screw lifting mechanism provides a reliable execution basis for precise and rapid adjustment of the gap; and the closed-loop control algorithm with separator result feedback as the core endows the overall solution with continuous self-learning and optimization capabilities. This integrated design enables the entire production line to intelligently adapt to various variables in the production process, ensuring long-term operational stability and reliability, and laying a solid technical foundation for the comprehensive intelligent upgrade of financial bill production.

[0019] (5) In the present invention, the splitting sheet adopts an elastic sheet with an arc-shaped bottom edge. This structure is based on a large number of experimental verifications. The arc-shaped edge at the bottom of the splitting sheet can provide a smooth cut and transition slope when contacting the stack of deposit certificates, effectively reducing the risk of scratching or jamming on the surface of the deposit certificates below, while enhancing the centering and fault tolerance of the splitting sheet in small gaps. The elastic design of the sheet gives it the necessary flexibility, so that when it encounters instantaneous unevenness in the thickness of the stack of deposit certificates or local interference from the anti-slip protrusions of the conveyor belt, it can undergo adaptive small deformation, thereby buffering the impact, reducing hard friction, ensuring a smooth splitting process, protecting the surface quality of the deposit certificates, and extending the service life of the splitting sheet itself. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below: Figure 1 This is a schematic diagram of the certificate production line structure with automatic sorting and sampling functions as described in this embodiment of the invention; Figure 2 This is a partial structural diagram of the transmission unit described in an embodiment of the present invention; Figure 3 This is a schematic diagram of a partial structure of the subunit described in an embodiment of the present invention; Figure 4 This is a flowchart illustrating the working method of the certificate production line with automatic sorting and sampling functions as described in this embodiment of the invention. Among them, 1. Conveying unit; 1-1. Conveyor belt; 1-2. Anti-slip ridge; 2. Separating unit; 2-1. Support frame; 2-2. Separating sheet; 3. Detection unit. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1 The passive vehicle identification system for highway toll stations based on electromagnetic induction, as described in Embodiment 1, will be explained in detail below with reference to the accompanying drawings.

[0024] In one or more embodiments, such as Figure 1 As shown, the certificate production line with automatic sorting and sampling functions includes a sequentially arranged conveying unit 1, sorting unit 2, detection unit 3, and packaging unit; wherein: The conveying unit 1 includes a conveyor belt 1-1 and a transmission system for conveying a preset number of stacked deposit certificates to the book-sharing unit 2; wherein, the conveyor belt 1-1 is uniformly provided with anti-slip ridges 1-2; The sorting unit 2 includes a support frame 2-1 spanning the conveyor belt 1-1 and a sorting sheet 2-2 disposed on the top crossbeam of the support frame 2-1; the sorting sheet 2-2 is an elastic sheet with a curved bottom edge, the sorting sheet 2-2 is perpendicular to the conveyor belt 1-1 and the distance between the sorting sheet and the conveying order is adjustable; wherein, the distance between the bottom end of the sorting sheet 2-2 and the conveyor belt 1-1 is adaptively adjusted based on the average thickness of the current batch of orders and dynamic compensation parameters; The detection unit 3 is used to acquire images of the first page of the deposit certificate output by the certificate unit 2, and perform defect detection based on the acquired images and a preset image recognition algorithm to achieve random inspection of the deposit certificates.

[0025] In one or more embodiments, such as Figure 2As shown, the core of the conveying unit 1 is a circular conveyor belt 1-1, which is driven by a motor through a reducer to achieve cyclic operation of the rollers. The bearing surface (i.e., the upper surface) of the conveyor belt 1-1 is made of a high-friction coefficient material and has parallel anti-slip ridges 1-2 uniformly pressed along the conveying direction. The spacing between adjacent anti-slip ridges 1-2 is adapted to the width of the deposit slip. The cross-section of the anti-slip ridges 1-2 is trapezoidal, with a height of approximately 1 to 2 mm. The spacing between adjacent anti-slip ridges 1-2 (i.e., the groove width) is slightly larger than the width of a single deposit slip. For example, for a deposit slip with a width of 210 mm, the spacing can be set to 215 mm to ensure that the deposit slip can be stably embedded in the groove and prevent lateral displacement or tipping during conveying. Above the starting end of the conveyor belt 1-1, there is a manual or automatic feeding station for placing the printed deposit slips stacked to a predetermined height (e.g., corresponding to a total of 100 finished products) onto the conveyor belt 1-1.

[0026] It should be noted that the scheme described in this embodiment uses a stack of deposit slips arranged in ascending order of serial number after the initial printing process as the input to the production line. During the initial printing process, the printing data of each deposit slip in each batch is stored separately, and image recognition-based defect detection is also performed on the printed deposit slips. Correspondingly, it should be noted that the sampling inspection in this embodiment is for two reasons: First, the detection in the initial printing process is based on image recognition algorithms. Those skilled in the art should understand that no image processing algorithm can guarantee 100% accuracy of the detection results. Therefore, subsequent sampling inspection is used to further improve the accuracy of deposit slip printing. Second, the purpose of sampling inspection on the first page of each deposit slip after sorting is to ensure that the quantity of each deposit slip is consistent and that the serial numbers of adjacent deposit slips are continuous.

[0027] In one or more embodiments, such as Figure 3 As shown, the book-separating unit 2 is the core component for automatically separating and binding deposit slips into booklets. It mainly includes a support frame 2-1, book-separating sheet 2-2, and an electric screw lifting mechanism.

[0028] In specific implementation, the sorting unit 2, based on the friction of the stack of deposit certificates to be sorted by the conveyor belt 1-1 and the reaction force of the sorting sheet 2-2 on the stack of deposit certificates, combined with the pre-set anti-slip ridges 1-2 on the conveyor belt 1-1 and the distance between the bottom of the sorting sheet 2-2 and the conveyor belt 1-1, realizes the sorting of a preset number of deposit certificates at the bottom of the stack of deposit certificates.

[0029] In one or more embodiments, the copy sheet 2-2 is connected to the top beam of the support frame 2-1 via an electric screw lifting mechanism, and the screw nut of the electric screw lifting mechanism is fixedly connected to the copy sheet 2-2 via a connecting plate; the distance between the bottom of the copy sheet 2-2 and the conveyor belt 1-1 is adapted to the thickness of the single copy deposit slip.

[0030] In specific implementation, the support frame 2-1 is a gantry structure, spanning the frame on both sides of the conveyor belt 1-1, with a horizontal beam at its top. The separator sheet 2-2 is a long strip of elastic steel or engineering plastic sheet, its length slightly greater than the width of the conveyor belt 1-1. The bottom of the separator sheet 2-2 is machined into a smooth, guiding arc-shaped edge to facilitate smooth contact of the certificate stack and generate the separator effect; the separator sheet 2-2 is rigidly connected to the screw nut of the electric screw lifting mechanism through a connecting plate fixed to its back; the separator sheet 2-2 is installed perpendicular to the plane of the conveyor belt 1-1, and the vertical distance between its bottom end and the bearing surface of the conveyor belt 1-1 can be precisely adjusted by the lifting mechanism.

[0031] The electric lead screw lifting mechanism specifically includes a servo motor, a ball screw, a lead screw nut, a linear guide rail, and a position encoder. The servo motor is fixed on the crossbeam of the support frame 2-1 and drives the ball screw to rotate, thereby causing the lead screw nut and the connected sub-plate 2-2 to move vertically up and down along the linear guide rail. In specific implementation, the position encoder provides real-time feedback on the height position of the sub-plate 2-2, forming a closed-loop control to ensure that the gap adjustment accuracy can reach ±0.01mm.

[0032] In one or more embodiments, the spacing between the bottom edge of the sub-piece 2-2 and the conveyor belt 1-1 is adaptively set, specifically using the following formula: in, For spacing, The average thickness of the current batch of deposit certificates is obtained through online detection. The preset number of single-book deposit slips, For dynamic compensation parameters, This is the preset compensation step size.

[0033] It should be noted here that the average thickness A simple laser thickness measurement station can be set up upstream of the conveying unit 1. Based on the measured thickness of the certificate stack and the known number of certificates in the current stack, the average thickness of the certificates in the current batch can be obtained. Simultaneously, the preset compensation step size... For a relatively small value, the scheme described in this embodiment is set to 1 / 10 of the average thickness of the deposit certificate.

[0034] Understandably, if the number of deposit slips in the current batch result is less than N, it indicates that the interval is too small and should be appropriately increased. Therefore, the parameters should be adjusted in this case. The value should be positive. If the number of deposit slips in the current result is greater than N, it indicates that the gap is too large and the gap should be appropriately reduced. Therefore, the parameter should be adjusted accordingly. The value should be negative; when the number of deposit slips in the current result equals N, it indicates that the gap is just right, so the parameter should be adjusted at this time. The value is 0.

[0035] For ease of understanding, the working principle of the book-splitting unit 2 is explained in detail below: As the stack of certificates of deposit moves forward on conveyor belt 1-1 to the splitting plate 2-2, the bottom of the stacked certificates of deposit contacts conveyor belt 1-1. Driven by the anti-slip ridges 1-2 and the friction of conveyor belt 1-1, they gain forward momentum. The middle and upper parts of the stack contact the fixed splitting plate 2-2, experiencing a backward resisting force (reaction force). Under the combined action of these two opposing forces, the bottom certificate of deposit (whose thickness is exactly equal to or slightly less than the gap H) is "peeled" from the stack and, as conveyor belt 1-1 continues to move forward, completes one splitting cycle. Subsequent stacks of certificates of deposit, blocked by splitting plate 2-2, await the next splitting cycle.

[0036] In one or more embodiments, the detection unit 3 is located downstream of the book-splitting unit 2 and is used to perform online, non-contact dual verification and random inspection on each book of deposit certificates output after book splitting.

[0037] In a specific implementation, the detection unit 3 integrates an image sensor (such as an industrial CCD camera), a laser displacement sensor, and an embedded processor, wherein: Image sensor: Fixedly mounted directly above conveyor belt 1-1, equipped with a ring light source to provide uniform illumination. Its lens focal length and depth of field are optimized to ensure clear capture of images of the first page of the deposit book passing by at high speed.

[0038] Laser displacement sensor: Installed next to the image sensor, it is used for non-contact measurement of the overall thickness of the current deposit book.

[0039] The detection unit 3 mainly performs the following processing steps: Based on the acquired deposit slip image, it obtains the deposit slip number on the first page of the current deposit slip book through OCR technology, and determines the number of deposit slips in the current deposit slip book by combining it with the deposit slip number on the first page of the deposit slip book obtained in the previous book splitting; it determines the thickness of the current deposit slip book based on the laser displacement sensor, and determines the number of deposit slips in the current deposit slip book by combining it with the average thickness of the deposit slips; when the two determined deposit slip numbers are consistent and both are equal to the preset number of deposit slips in a single book, the next book splitting operation is performed; otherwise, the production line is paused and an alarm is issued.

[0040] In one or more embodiments, the detection unit 3 is also used to obtain attribute data on the certificate through OCR technology and compare it with attribute data pre-stored during the printing process. When the comparison result is incorrect, the production line is paused and an alarm is issued.

[0041] In specific implementation, the detection and verification process of the detection unit 3 is as follows: (1) Count verification based on consecutive serial numbers: The processor performs OCR (Optical Character Recognition) processing on the first page deposit slip image acquired by the image sensor to extract the unique serial number (such as the printing number) of the deposit slip. An incremental serial number queue is pre-recorded and maintained. By calculating the difference between the currently recognized serial number and the first page number of the previous deposit slip, the number of deposit slips contained in the current deposit slip book can be accurately estimated (assuming that the deposit slips are stacked in sequential numbering). For example, if the first page number of the previous book is 100 and the current first page number is 90, if the serial numbers are consecutive, the number of slips is 10.

[0042] (2) Verification of the number of sheets based on thickness measurement: The actual thickness of the current deposit certificate is measured by a laser displacement sensor. Based on the known average sheet thickness of this batch A predicted number of sheets can be calculated: Predicted number of sheets (Round up).

[0043] (3) Cross-validation and judgment: The number of sheets calculated by the above two methods is compared. Only when the two results are consistent and both are equal to N, is the sheet division determined to be correct and the sheet can continue to flow to the packaging unit. If the two results are inconsistent or either result is not equal to N, the sheet division is immediately judged to be abnormal.

[0044] (4) Sampling inspection of printed content: While recognizing the number using OCR, the solution described in this embodiment can also recognize other key attribute data on the deposit slip (such as account name, amount, date, etc.) and automatically compare it with the correct data pre-stored in the production task database. If an inconsistency is found, it is determined to be a printing defect.

[0045] (5) Abnormal Handling: Once an abnormality is detected in step (3) or (4), the central controller will immediately issue an emergency stop command to the entire line, suspend the operation of conveyor belt 1-1, and trigger the audible and visual alarm to notify the operator to intervene. At the same time, the specific abnormality type (such as "short sheet", "excess sheet" or "information mismatch") and the location of occurrence will be displayed on the remote human-machine interface.

[0046] In practice, the packaging unit is located at the end of the production line and can be a conventional automatic strapping machine or cartoning machine. The packaging unit will only be triggered when a qualified certificate that has been verified by the detection unit 3 arrives, and will perform packaging operations such as strapping, labeling or cartoning, and finally output the finished product.

[0047] Example 2 like Figure 4 As shown, the working method of a certificate of deposit production line with automatic sorting and sampling functions is applied to the aforementioned certificate of deposit production line with automatic sorting and sampling functions. The method includes: Based on the average thickness of the current batch of deposit certificates and the preset number of deposit certificates per book, initialize the gap height between the book sheet 2-2 and the conveyor belt 1-1; The stack of deposit certificates with a preset number of certificates is transported by conveyor belt 1-1 and the stack of deposit certificates is divided into separate units 2. Based on the detection unit 3, the deposit certificates after being divided are randomly inspected, and the deposit certificates that pass the inspection are then packaged. The distance between the bottom of the sub-segment 2-2 and the conveyor belt 1-1 is adaptively adjusted based on the monitoring results of the detection unit 3.

[0048] In one or more embodiments, the spacing between the bottom edge of the split sheet 2-2 and the conveyor belt 1-1 is adaptively adjusted, specifically using the following formula: in, For spacing, The average thickness of the current batch of deposit certificates is obtained through online detection. The preset number of single-book deposit slips, For dynamic compensation parameters, This is the preset compensation step size.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A certificate of deposit production line with automatic sorting and sampling inspection functions, characterized in that, It includes a sequentially configured transmission unit, a sample unit, a detection unit, and a packaging unit; wherein: The conveying unit includes a conveyor belt and a transmission system for conveying a preset number of stacks of deposit certificates to the sub-unit; wherein, the conveyor belt is uniformly provided with anti-slip ridges; The sorting unit includes a support frame spanning the conveyor belt and a sorting sheet disposed on the top crossbeam of the support frame; the sorting sheet is an elastic sheet with a curved bottom edge, the sorting sheet is perpendicular to the conveyor belt and the distance between the sorting sheet and the conveyor belt is adjustable; wherein, the distance between the bottom of the sorting sheet and the conveyor belt is adaptively adjusted based on the average thickness of the current batch of deposit certificates and dynamic compensation parameters. The detection unit is used to acquire images of the first page of the deposit certificate output by the certificate unit, and perform defect detection based on the acquired images and a preset image recognition algorithm to achieve random inspection of the deposit certificates.

2. The certificate of deposit production line with automatic sorting and sampling inspection functions as described in claim 1, characterized in that, The sorting unit, based on the friction of the conveyor belt against the stack of deposit certificates to be sorted and the reaction force of the sorting sheet against the stack of deposit certificates, combined with the pre-set anti-slip protrusions on the conveyor belt and the distance between the bottom of the sorting sheet and the conveyor belt, realizes the sorting of a preset number of deposit certificates at the bottom of the stack of deposit certificates.

3. The certificate of deposit production line with automatic sorting and sampling inspection functions as described in claim 1, characterized in that, The substrate sheet is connected to the top crossbeam of the support frame via an electric screw lifting mechanism, and the screw nut of the electric screw lifting mechanism is fixedly connected to the substrate sheet via a connecting plate.

4. The certificate of deposit production line with automatic sorting and sampling inspection functions as described in claim 1, characterized in that, The distance between the bottom edge of the document and the conveyor belt is adapted to the thickness of the single document.

5. The certificate production line with automatic sorting and sampling functions as described in claim 1, characterized in that, The distance between the bottom edge of the segment and the conveyor belt is adaptively set, specifically using the following formula: in, For spacing, The average thickness of the current batch of certificates of deposit, obtained through online detection. The preset number of single-book deposit slips, For dynamic compensation parameters, This is the preset compensation step size.

6. The certificate of deposit production line with automatic sorting and sampling inspection functions as described in claim 1, characterized in that, The spacing between adjacent anti-slip protrusions is adapted to the width of the deposit slip.

7. The certificate of deposit production line with automatic sorting and sampling inspection functions as described in claim 1, characterized in that, The detection unit includes an integrated image sensor, a laser displacement sensor, and a processor, and specifically performs the following processing steps: Based on the acquired deposit slip image, the number of the deposit slip on the first page of the current deposit slip book is obtained through OCR technology, and combined with the number of the deposit slip on the first page of the deposit slip book obtained in the previous book splitting, the number of deposit slips in the current deposit slip book is determined; Based on the laser displacement sensor, the thickness of the current deposit slip book is determined, and combined with the average thickness of the deposit slips, the number of deposit slips in the current deposit slip book is determined; When the two determined numbers of deposit slips are consistent and both are equal to the preset number of deposit slips in a single book, the next book splitting operation is executed; otherwise, the pipeline is paused and an alarm is issued.

8. The certificate of deposit production line with automatic sorting and sampling inspection functions as described in claim 1, characterized in that, The detection unit is also used to obtain attribute data on the certificate through OCR technology and compare it with the attribute data pre-stored during the printing process. When the comparison result is incorrect, the production line is paused and an alarm is issued.

9. A working method for a certificate of deposit production line with automatic sorting and sampling inspection functions, characterized in that: It is based on a certificate of deposit production line with automatic sorting and sampling functions as described in any one of claims 1-8, the method comprising: Based on the average thickness of the current batch of deposit certificates and the preset number of deposit certificates per book, initialize the gap height between the book sheet and the conveyor belt; The stack of deposit certificates with a preset number of certificates is transported by a conveyor belt and then divided into separate units. Based on the detection unit, the deposit certificates are randomly sampled after being divided into separate volumes, and the qualified deposit certificates are then packaged. The distance between the bottom of the substrate and the conveyor belt is adaptively adjusted based on the monitoring results of the detection unit.

10. The working method of the certificate production line with automatic sorting and sampling functions as described in claim 9, characterized in that, The spacing between the bottom edge of the split sheet and the conveyor belt is adaptively adjusted using the following formula: in, For spacing, The average thickness of the current batch of certificates of deposit, obtained through online detection. The preset number of single-book deposit slips, For dynamic compensation parameters, This is the preset compensation step size.

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