Bill quality testing equipment, evaluation equipment and bill quality testing method

Abstract

The present invention provides a bill quality detection device, an evaluation device and a bill quality detection method. The bill quality detection device comprises: a detection bracket; a moving guide rail, which is connected to the detection bracket; a detection station, which is used to place the bill, and the detection station is slidably connected to the moving guide rail; a detection device, which is connected to the detection bracket, and the detection device is arranged above the detection station, so that the detection device performs various quality defect detections on the bill moving along the moving guide rail. The bill quality detection device provided by the present invention is provided with a detection device for detecting several detection items, and performs a full range of quality detection on the bill. By driving the bill through the detection device through a moving mechanism, comprehensive bill quality information can be obtained, which facilitates an objective and full range of evaluation of the bill.

Description

Technical Field

[0001] The present invention relates to the field of printing technology equipment, and in particular to a bill quality detection device, an evaluation device and a bill quality detection method. Background Art

[0002] At present, as the People's Bank of China increases its requirements for the quality of banknote printing and issuance, the requirements for the quality of banknote face are also increasing. However, the existing testing equipment cannot conduct a comprehensive and integrated test on the quality of banknotes, and the testing performance of each testing equipment is also different, so it is impossible to conduct a qualitative or quantitative analysis of the quality of the bills based on the test results. Summary of the invention

[0003] The embodiments according to the present invention are intended to solve or improve at least one of the above technical problems.

[0004] A first object of an embodiment of the present invention is to provide a bill quality detection device.

[0005] A second object of an embodiment of the present invention is to provide a bill quality evaluation device.

[0006] A third objective of an embodiment of the present invention is to provide a bill quality detection method.

[0007] To achieve the first purpose of an embodiment of the present invention, the technical solution of the present invention provides a bill quality detection device for detecting the quality of a bill, and the bill quality detection device includes: a detection bracket; a moving guide rail, which is connected to the detection bracket; a detection station, which is used to place the bill, and the detection station is slidably connected to the moving guide rail; a detection device, which is connected to the detection bracket, and the detection device is arranged above the detection station, so that the detection device can perform various quality defect detections on the bill moving along the moving guide rail.

[0008] In this technical solution, the detection bracket is a cubic frame structure, and the moving guide rail is connected to the detection bracket, and the moving guide rail is arranged at the bottom of the detection bracket. The detection station where the bill is placed is slidably connected to the moving guide rail so that the detection station can slide in the left and right direction as shown in the figure. The detection device is connected to the inside of the detection bracket, and the detection device is located above the detection station, so that when the detection station slides to the bottom of the detection device, the detection device can sequentially perform various quality defect detections on the bill on the detection station. The bill quality detection equipment can realize comprehensive detection of the bill quality through the detection device, thereby improving the detection quality of the bill.

[0009] In addition, the bill quality detection device in the above embodiment provided by the present invention may also have the following additional technical features:

[0010] In the above technical solution, the detection device includes: a ticket face detection device, which is used to detect the printing quality of the ticket; a thickness detection device, which is used to detect the gravure thickness of the ticket; a line width detection device, which is used to detect the offset printing line width and ink color changes of the ticket; wherein the ticket face detection device, the thickness detection device and the line width detection device are spaced apart from each other along the moving guide rail and are respectively connected to the detection bracket.

[0011] In this technical solution, the bill quality detection equipment provided in this embodiment can complete multiple detection items of the bill at one time by setting up a bill face detection device, a thickness detection device and a line width detection device. It has both a bill face detection device and a line width detection device for detecting detection items of the bill in a plane space, and a thickness detection device for detecting detection items of the bill in a three-dimensional space. Therefore, the bill quality detection equipment provided by this technical solution can perform all-round detection of the quality of the bill to obtain comprehensive bill quality information, thereby facilitating an objective and comprehensive comprehensive evaluation of the overall quality of the bill.

[0012] In any of the above technical solutions, the ticket detection device includes: a connecting frame, which is connected to the detection bracket; a depth of field fine-tuning mechanism, which is slidably connected to the connecting frame so that the depth of field fine-tuning mechanism is close to or away from the detection station; a linear array color camera, which is connected to the connecting frame to photograph the bill located on the detection station; a linear array lens, which is connected to the linear array color camera; a filter switching mechanism, which is arranged relative to the linear array lens to switch the filter used for the linear array lens; a linear array light source, which is arranged relative to the filter switching mechanism, and the linear array light source is arranged between the filter switching mechanism and the detection station.

[0013] In this technical solution, a linear array color camera refers to a color camera that uses a linear array image sensor, which is suitable for high-precision detection. Compared with an area array camera, a linear array camera has a higher resolution and a faster image acquisition speed, and is more suitable for the detection of dynamic targets. A linear array lens refers to a lens that is compatible with a linear array color camera. During the quality inspection process, the bill passes under the linear array color camera, and the linear array color camera continuously scans the bill to capture an image. The filter switching mechanism is used to switch between filters of different colors, or to switch whether to use a filter, so that light can be decomposed into different colors through the filter, which is convenient for image acquisition by the linear array color camera. The depth of field fine-tuning mechanism is used to adjust the position of the linear array color camera in the up and down directions, which can make the linear array color camera close to or away from the bill, thereby improving the image acquisition effect.

[0014] In any of the above technical solutions, the thickness detection device includes: a three-dimensional measuring instrument; wherein the three-dimensional measuring instrument is arranged above the detection station.

[0015] In this technical solution, a three-dimensional measuring instrument is set up to detect the gravure effect of the bill from the perspective of quality control. The direction of the three-dimensional measuring instrument pointing to the detection station is the Z axis, that is, the up and down direction. A three-dimensional measuring instrument with a vertical detection accuracy of microns can be used to achieve quantitative detection in the thickness direction to obtain the thickness direction data of the paper surface of the bill. The data of the concave part of the paper surface is used to directly describe the gravure effect produced by the gravure pressure; the data of the convex part of the paper surface is subtracted from the data of the concave part to indirectly describe the gravure effect produced by the gravure ink layer, so as to determine the quality of the gravure effect as a quality inspection, thereby improving the comprehensiveness of the comprehensive evaluation of the overall quality of the bill.

[0016] In any of the above technical solutions, the line width detection device includes: an area array camera; a telecentric lens connected to the area array camera; and a coaxial light source connected to the telecentric lens.

[0017] In this technical solution, by setting up a line width detection device, the thickness of the lines on the bill can be detected and compared with the line thickness of the standard product, including both the line width of offset printing and the line width of gravure printing, so as to detect the quality of the lines on the bill. Among them, the area array camera can accurately capture the width of the line, and can convert the three-dimensional lines with thickness into a two-dimensional image to obtain more intuitive two-dimensional image information. In addition, compared with the traditional lens, the telecentric lens can keep the image magnification unchanged within a certain object distance range, that is, the image taken by the telecentric lens does not have a relationship between near and far, which can reduce the influence of the parallax of the traditional lens, so that the detection structure is more accurate. The lighting effect of the ring light source is more uniform, and the adverse effects of shadows on line acquisition are greatly reduced, which helps to improve the accuracy of the detection results. In this way, regardless of whether the bill uses gravure printing technology, the thickness of the lines on the bill can be accurately obtained.

[0018] In any of the above technical solutions, the detection device also includes: a coating detection device, which is used to detect the brightness difference of the bill; wherein the bill surface detection device is located between the thickness detection device and the coating detection device.

[0019] In this technical solution, after the paper of the bill is coated with glue, there is a brightness difference between the coated area and the uncoated area under the lighting condition where the camera and the light source are at a large angle. This difference can be detected by the coating detection device, so as to determine the uniformity of the paper coating of the bill and judge whether there are defects such as white exposure in the coating process of the bill. At the same time, the brightness difference is detected by the coating detection device, and the imaging effect is good, and the contrast of coating defects is obvious, which is better than the detection effect of irradiation with ultraviolet light.

[0020] In any of the above technical solutions, the coating detection device includes: a deep ultraviolet camera; a matching lens, which is connected to the deep ultraviolet camera; a dome light source, which is arranged opposite to the matching lens and is arranged between the matching lens and the detection station.

[0021] In this technical solution, the deep ultraviolet camera, also known as the deep ultraviolet scientific research camera, can be used for ultraviolet imaging and spectral analysis. At the same time, the dome light source uses ultraviolet light with a wavelength of millimeters, and the matching lens is a lens of a specific band, which can take pictures under the irradiation of ultraviolet light of millimeters. Among them, the light emitted by the dome light source forms scattered illumination light through the reflection of the arched bowl, which can achieve uniform illumination of the bill surface, eliminate shadows, and improve the effect of image acquisition.

[0022] In any of the above technical solutions, the bill quality detection equipment also includes: a position adjustment guide rail, which is connected to the detection bracket, and the position adjustment guide rail is arranged relative to the moving guide rail; wherein the thickness detection device and the line width detection device are respectively slidably connected to the position adjustment guide rail, so that the thickness detection device and the line width detection device can be close to or away from the moving guide rail.

[0023] In this technical solution, the bill quality inspection device can make the thickness detection device and the line width detection device move in a forward and backward direction perpendicular to the left and right translational movement direction of the inspection station by setting a position adjustment rail, so that the position adjustment rail and the motion rail cooperate with each other, so that the thickness detection device and the line width detection device can perform quality inspection on the entire width of the bill. The number of position adjustment rails can be two, and the two position adjustment rails are respectively connected to the thickness detection device and the line width detection device to independently control the translational movement of the thickness detection device and the line width detection device. The number of position adjustment rails can also be one, and the thickness detection device and the line width detection device share one position adjustment rail, which can save the internal space of the detection bracket and thus reduce the overall volume of the bill quality inspection device.

[0024] In any of the above technical solutions, the bill quality inspection equipment also includes: a silo, which is used to place bills, and the silo is connected to the inspection bracket; wherein, the silo is set to two, and the two silos are respectively arranged at the opposite ends of the moving guide rail; or the silo is set to one, and one silo is arranged at either end of the opposite ends of the moving guide rail.

[0025] In this technical solution, the silo is divided into a feed silo and a discharge silo. The feed silo is used to place the bills to be inspected, and the discharge silo is used to place the inspected bills. By reasonably setting the positions of the feed silo and the discharge silo, the length and width of the quality inspection equipment can be controlled.

[0026] In any of the above technical solutions, an in-warehouse station and a size adjustment mechanism are provided in the silo. The in-warehouse station is used to place bills. The size adjustment mechanism is connected to the in-warehouse station to adjust the size of the in-warehouse station according to the face size of the bill.

[0027] In this technical solution, the bill quality detection device is provided with a size adjustment mechanism so that bills of various sizes can be placed on the detection table. This increases the scope of application of the bill quality detection device provided by this technical solution. At the same time, the size adjustment mechanism can also assist in stacking multiple bills neatly, so that after the bills are transferred from the feed bin to the detection station, they are placed at the exact position on the detection station, that is, multiple bills of the same size, or the front and back sides of a bill are placed at the same position on the detection station. In this way, it is convenient for the detection device to detect the bills, and the accuracy of the detection results can be correspondingly improved. It can be understood that this is particularly important when detecting the printing effect of the bill through the front and back sides of the bill.

[0028] In any of the above technical solutions, the bill quality inspection equipment also includes: a bill picking and placing device, which is arranged between the material bin and the inspection station; wherein the bill picking and placing device is used to pick and place bills between the material bin and the inspection station.

[0029] In this technical solution, the bill in the feed bin can be transferred to the inspection station by the bill pick-up and placement device. After the bill passes the inspection of the inspection device along the moving guide rail at the inspection station, the bill on the inspection station can be transferred to the discharge bin by the bill pick-up and placement device. Thus, the speed of bill transmission is increased by setting the bill pick-up and placement device.

[0030] In any of the above technical solutions, the bill picking and placing device includes: a transfer guide rail, which is connected to the detection bracket; an adsorption mechanism, which is slidably connected to the transfer guide rail; wherein the adsorption mechanism is used to take out the bills in the silo and place them on the detection station; or the adsorption mechanism is used to take out the bills on the detection station and place them in the silo.

[0031] In this technical solution, the adsorption mechanism moves linearly along the transfer guide rail, and can transfer the bills to be tested from the feed bin to the detection station, and can transfer the tested bills from the detection station to the discharge bin. By setting up the adsorption mechanism, one bill can be adsorbed at a time, reducing the possibility of transferring multiple bills to the detection station at one time, thereby improving the reliability of the equipment. At the same time, through the adsorption method, it can be handled with care to reduce damage to the bills. In addition, by setting up the bill picking and placing device and the motion guide rail to work together, the adsorption mechanism will perform the transfer work after the detection table moves to the appropriate position, which can effectively increase the circulation speed of the bill, thereby improving the efficiency of detection.

[0032] In any of the above technical solutions, the inspection station includes: an inspection table, which is slidably connected to the moving guide rail and is used to place the bill; a pressure plate guide rail, which is connected to the inspection table; a pressure plate guide post, one end of which is connected to the pressure plate guide post; a pressure plate assembly, which is slidably connected to the pressure plate guide rail and is connected to the pressure plate guide post, so that the pressure plate assembly approaches the inspection table along the pressure plate guide post and cooperates with the inspection table to clamp the bill.

[0033] In this technical solution, the inspection station includes an inspection platform and a pressure plate assembly. By setting up the inspection platform and the pressure plate assembly, the bill is clamped from both sides of the bill. On the one hand, the bill is fixed to reduce the possibility of bill movement during the inspection process, and on the other hand, the bill can be flattened to facilitate bill inspection, thereby obtaining more accurate inspection results. At the same time, the bill surface inspection device, thickness inspection device, line width inspection device and other inspection devices set above the inspection station can also perform image acquisition through the pressure plate assembly.

[0034] In any of the above technical solutions, the pressure plate assembly includes: a pressure plate frame; and a first glass plate, wherein the first glass plate is disposed in the pressure plate frame.

[0035] In this technical solution, the detection table and the first glass plate cooperate with each other to clamp the bill; a transparent light source is provided under the detection station, and the transparent light source is arranged opposite to the bill surface detection device. The light emitted by the transparent light source is suitable for passing through the first glass plate so that the bill surface detection device can be used to detect the hollow effect of the bill surface.

[0036] In any of the above technical solutions, the bill quality detection device also includes: a chassis, which is used to set up a detection bracket; a display control device, which is arranged on the chassis and is communicatively connected with the detection device.

[0037] In this technical solution, the detection device can be protected by setting up a chassis, and the possibility of external factors interfering with quality detection can be reduced. Among them, the display control device includes a display function and a control function. By setting up the display control device, the detection results can be displayed, and the motion mechanism can be controlled to perform corresponding actions, such as driving the translation movement of the detection station.

[0038] To achieve the second objective of the present invention, an embodiment of the present invention provides a bill quality evaluation device, comprising a bill quality detection device as in any technical solution; and a processor, the processor being communicatively connected to the bill quality detection device.

[0039] In this technical solution, the processor may be a computer or other device, connected to the bill quality detection device via a data line. The processor may be a module with processing functions, arranged in the structure of the bill quality detection device. In addition, the bill quality evaluation device in this technical solution includes the bill quality detection device in any technical solution of the present invention, and thus has all the beneficial effects of the bill quality detection device in any technical solution above, which will not be described in detail here.

[0040] To achieve the third purpose of the present invention, an embodiment of the present invention provides a bill quality detection method, using a bill quality detection device such as any of the above technical solutions to detect and evaluate the quality of the bill, the bill quality detection method includes: placing the bill on a detection station; the detection station translates along a first guide rail so that the bill passes through multiple types of detection devices in sequence; the detection device captures an image of the bill to obtain an image feature set; obtains feature information corresponding to the printing process of the bill based on the image feature set; and summarizes the feature information to generate a quality evaluation report.

[0041] The bill quality detection method provided in this embodiment uses the bill quality detection device in any of the above embodiments to detect the bill quality, and thus has all the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0042] In any of the above technical solutions, characteristic information corresponding to the printing process of the bill is obtained based on the image feature set, specifically including: extracting the image feature set formed on the bill by the offset printing process in the printing process to obtain the offset printing characteristic information; extracting the image feature set formed on the bill by the gravure printing process in the printing process to obtain the gravure printing characteristic information; extracting the image feature set formed on the bill by the code printing process in the printing process to obtain the code printing characteristic information; extracting the image feature set formed on the bill by the silk screen printing process in the printing process to obtain the silk screen printing characteristic information; extracting the image feature set formed on the bill by the coating process in the printing process to obtain the coating characteristic information; extracting the image feature set formed on the bill by the cutting process in the printing process to obtain the cutting characteristic information; extracting the image feature set formed on the bill by the anti-counterfeiting process in the printing process, Anti-counterfeiting characteristic information is obtained; wherein, the offset printing characteristic information includes: offset printing defect characteristic information, offset printing ink color characteristic information, registration characteristic information, offset printing overprint characteristic information, offset printing wiring characteristic information, mixed color characteristic information, offset printing line width characteristic information, anti-copying mark characteristic information, and colored fluorescent characteristic information; the gravure printing characteristic information includes: gravure printing defect characteristic information, gravure printing ink color characteristic information, gravure printing overprint characteristic information, gravure printing wiring characteristic information, gravure printing line width characteristic information, infrared characteristic information, and thickness measurement characteristic information; the code printing characteristic information includes: number printing defect characteristic information and colorless fluorescent characteristic information; the silk screen printing characteristic information includes: silk screen printing defect characteristic information and optical gradient magnetic ink characteristic information; the coating characteristic information includes: coating defect characteristic information; the anti-counterfeiting characteristic information includes: watermark characteristic information and security line characteristic information; the cutting characteristic information includes: cutting size characteristic information and squareness characteristic information.

[0043] In the technical solution, the step of extracting feature information corresponding to the printing process from the image feature set includes: extracting the image feature set formed on the bill by the offset printing process to obtain offset printing feature information, wherein the offset printing feature information includes: offset printing defect feature information, offset printing ink color feature information, counter printing feature information, offset printing overprint feature information, offset printing wiring feature information, color mixing feature information, offset printing line width feature information, anti-copying mark feature information, and colored fluorescent feature information; extracting the image feature set formed on the bill by the gravure printing process to obtain gravure printing feature information, wherein the gravure printing feature information includes: gravure printing defect feature information, gravure printing ink color feature information, gravure printing overprint feature information, gravure printing wiring feature information, gravure printing line width feature information, infrared feature information, and thickness measurement feature information; extracting the image feature set formed on the bill by the code printing process to obtain gravure printing feature information, wherein the gravure printing feature information includes: gravure printing defect feature information, gravure printing ink color feature information, gravure printing overprint feature information, gravure printing wiring feature information, gravure printing line width feature information, infrared feature information, and thickness measurement feature information. The code feature information is extracted to obtain the printing feature information, wherein the printing feature information includes: number printing defect feature information and colorless fluorescent feature information; the image feature set formed on the bill by the silk-screen printing process is extracted to obtain the silk-screen feature information, wherein the silk-screen feature information includes: silk-screen defect feature information and optical gradient magnetic ink feature information; the image feature set formed on the bill by the coating process is extracted to obtain the coating feature information, wherein the coating feature information includes: coating defect feature information; the image feature set formed on the bill by the cutting process is extracted to obtain the cutting feature information, wherein the cutting feature information includes: cutting size feature information and squareness feature information; the image feature set formed on the bill by the anti-counterfeiting process is extracted to obtain the anti-counterfeiting feature information, wherein the anti-counterfeiting feature information includes: watermark feature information and security line feature information.

[0044] In any of the above technical solutions, the bill quality detection method further includes: turning the bill over and detecting the other side of the bill.

[0045] In this technical solution, the step of inspecting the other side of the bill includes: placing the bill on an inspection station; setting a number of inspection items according to the printing process of the bill, wherein the printing process includes an offset printing process, a gravure printing process, a code printing process, a silk screen printing process, a coating process, a cutting process and an anti-counterfeiting process; driving the inspection station to translate along a motion guide rail so that the bill passes through a plurality of inspection devices in sequence; inspecting the bill item by item according to a number of inspection items to obtain feature information of a number of inspection items of the bill through the inspection device, wherein the feature information includes offset printing feature information, gravure printing feature information, code printing feature information, silk screen printing feature information, coating feature information, cutting feature information and anti-counterfeiting feature information.

[0046] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned through practice of the present invention.

[0047] Additional aspects and advantages of embodiments according to the present invention will become apparent in the following description or may be learned through practice of embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The above and / or additional aspects and advantages of the embodiments of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0049] Figure 1 It is one of the structural schematic diagrams of the bill quality detection device in some embodiments of the present invention;

[0050] Figure 2 is a schematic diagram of the three-dimensional structure of a bill quality detection device in some embodiments of the present invention;

[0051] Figure 3 This is the second structural schematic diagram of the bill quality detection device in some embodiments of the present invention;

[0052] Figure 4 is a schematic diagram of the structure of the motion guide rail and the detection station in some embodiments of the present invention;

[0053] Figure 5 is a schematic diagram of the three-dimensional structure of a detection station in some embodiments of the present invention;

[0054] Figure 6 is a schematic diagram of the three-dimensional structure of the motion mechanism in some embodiments of the present invention;

[0055] Figure 7 It is a schematic diagram of the three-dimensional structure of the adsorption mechanism and the material feeding transfer rail in some embodiments of the present invention;

[0056] Figure 8 is a schematic diagram of the three-dimensional structure of the adsorption mechanism in some embodiments of the present invention;

[0057] Fig. 9 is a schematic diagram of the three-dimensional structure of a feed bin in some embodiments of the present invention;

[0058] Fig.10 is a schematic diagram of the three-dimensional structure of a ticket detection device in some embodiments of the present invention;

[0059] Fig.11 is a schematic diagram of the three-dimensional structure of a coating detection device in some embodiments of the present invention;

[0060] Fig.12 is a schematic diagram of the three-dimensional structure of a line width detection device in some embodiments of the present invention;

[0061] Fig.13 is a schematic diagram of the three-dimensional structure of a thickness detection device in some embodiments of the present invention;

[0062] Fig.14 is a schematic diagram of the three-dimensional structure of a line width detection device and a thickness detection device in some embodiments of the present invention;

[0063] Fig.15 is a schematic diagram of the external structure of a bill quality detection device in some embodiments of the present invention;

[0064] Fig.16 is a schematic diagram of the structure of a bill quality evaluation device in some embodiments of the present invention;

[0065] Fig.17 It is one of the flow charts of the bill quality detection method in some embodiments of the present invention;

[0066] Fig.18 This is the second flowchart of the bill quality detection method in some embodiments of the present invention;

[0067] Fig.19 is a schematic diagram of a coated note in some embodiments of the present invention;

[0068] Fig. 20 is a schematic diagram of an uncoated note in some embodiments of the present invention;

[0069] Fig.21 is a schematic diagram of a perspective imaged bill in some embodiments of the present invention;

[0070] Fig. 22 It is a diagram of the bill quality detection process in some embodiments of the present invention.

[0071] in, Figures 1 to 16 The corresponding relationship between the reference numerals and the component names is as follows:

[0072] 10 detection bracket; 20 material bin; 21 feeding bin; 211 working station in bin; 212 size adjustment mechanism; 22 discharging bin;

[0073] 30 motion mechanism; 31 motion guide rail; 32 detection station; 33 position adjustment guide rail; 34 infeed transfer guide rail; 35 outfeed transfer guide rail; 36 infeed adsorption device; 37 outfeed adsorption device;

[0074] 320 pressing plate assembly; 321 first glass plate; 322 testing platform; 323 pressing plate frame; 324 pressing plate guide column; 325 correction plate; 326 pressing plate guide rail; 327 second glass plate;

[0075] 361 suction cup; 362 air circuit; 363 spring device; 364 in-place photoelectric device;

[0076] 40 detection device; 41 ticket detection device; 411 linear array color camera; 412 linear array lens; 413 filter switching mechanism; 414 depth of field fine-tuning mechanism; 415 linear array light source; 416 connecting frame;

[0077] 42thickness detection device; 421three-dimensional measuring instrument;

[0078] 43 coating detection device; 431 deep ultraviolet camera; 432 matching lens; 433 dome light source;

[0079] 44 line width detection device; 441 area array camera; 442 telecentric lens; 443 coaxial light source;

[0080] 45 perspective light source; 50 chassis; 51 door; 60 display control device; 70 bill taking and placing device; 72 transfer guide rail; 74 adsorption mechanism;

[0081] 100 bill quality testing equipment; 200 bill quality evaluation equipment; 210 processor. DETAILED DESCRIPTION

[0082] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0083] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments according to the present invention. However, the embodiments according to the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the embodiments according to the present invention is not limited to the specific embodiments disclosed below.

[0084] Refer to the following Figures 1 to 22 The bill quality detection device 100, the bill quality evaluation device 200 and the bill quality detection method according to some embodiments of the present invention are described.

[0085] Some embodiments of the present application provide a bill quality inspection device 100 .

[0086] Example 1

[0087] like Figure 1As shown, this embodiment provides a bill quality detection device 100 for detecting the quality of bills, and the bill quality detection device 100 includes: a detection bracket 10, a moving guide rail 31, a detection station 32 and a detection device 40, and the moving guide rail 31 is connected to the detection bracket 10. The detection station 32 is used to place bills, and the detection station 32 is slidably connected to the moving guide rail 31. The detection device 40 is connected to the detection bracket 10, and the detection device 40 is arranged above the detection station 32, so that the detection device 40 performs various quality defect detections on the bills moving along the moving guide rail 31.

[0088] In this embodiment, Figure 1 As shown, the detection bracket 10 is a cubic frame structure, and the motion guide rail 31 is connected to the detection bracket 10, and the motion guide rail 31 is arranged at the bottom of the detection bracket 10. The detection station 32 on which the bill is placed is slidably connected to the motion guide rail 31, so that the detection station 32 can move along the detection bracket 10. Figure 1 The detection device 40 is connected to the inside of the detection bracket 10, and the detection device 40 is located above the detection station 32, so that when the detection station 32 slides to the bottom of the detection device 40, the detection device 40 can sequentially perform various quality defect detections on the bills on the detection station 32. The bill quality detection device 100 can realize comprehensive detection of bill quality through the detection device 40, thereby improving the detection quality of the bills.

[0089] Example 2

[0090] On the basis of Example 1, Figure 1 and Figure 2 As shown, the detection device 40 includes a bill face detection device 41, a thickness detection device 42 and a line width detection device 44. The bill face detection device 41 is used to detect the printing quality of the bill. The thickness detection device 42 is used to detect the gravure thickness of the bill. The line width detection device 44 is used to detect the offset printing line width and ink color change of the bill. Among them, the bill face detection device 41, the thickness detection device 42 and the line width detection device 44 are spaced from each other along the moving guide rail 31 and are respectively connected to the detection bracket 10.

[0091] In this embodiment, the ticket face detection device 41, the thickness detection device 42, and the line width detection device 44 are connected to the top of the detection bracket 10. The motion guide rail 31 and the detection station 32 constitute the motion mechanism 30. The motion guide rail 31 is connected to the bottom of the detection bracket 10 and extends in the left-right direction. The motion guide rail 31 is provided with a detection station 32 that can be translated along the extension direction of the motion guide rail 31. The detection station 32 is used to place the bill, so that during the translation movement of the detection station 32 along the extension direction of the motion guide rail 31, it can pass under the ticket face detection device 41, the thickness detection device 42, and the line width detection device 44 in sequence, so that the ticket face detection device 41 detects the printing quality of the bill, the thickness detection device 42 detects the gravure thickness of the bill, and the line width detection device 44 detects the offset printing line width and ink color change of the bill, so that the detection device 40 completes the comprehensive detection of the bill quality.

[0092] The bill quality inspection device 100 provided in this embodiment is capable of completing multiple inspection items for the bill at one time by setting up a bill face inspection device 41, a thickness inspection device 42 and a line width inspection device 44. It has both a bill face inspection device 41 and a line width inspection device 44 for inspecting inspection items of the bill in a plane space, and a thickness inspection device 42 for inspecting inspection items of the bill in a three-dimensional space. Therefore, the bill quality inspection device 100 provided by this technical solution can perform all-round inspection on the quality of the bill to obtain comprehensive bill quality information, thereby facilitating an objective and comprehensive comprehensive evaluation of the overall quality of the bill.

[0093] In this embodiment, the bill quality detection device 100 is used to detect the printing quality of the bill. The specific detection items include offset printing defects, ink color, printing, offset overprinting, wiring, color mixing, anti-copying marks, missing of colored fluorescence, missing printing, ink throwing, etc. and missing of infrared images, missing printing, ink throwing, dirty, etc., wherein the offset printing defects include ink dots, broken lines, missing printing, shallow flowers, ink pile, reverse dirt, smearing, ghosting, dirty, oil marks, etc., so as to conduct a comprehensive and detailed inspection of the printing quality of the bill. The thickness detection device 42 is used to detect the gravure thickness of the bill, and the line width detection device 44 is used to detect the line width of offset printing, the line width of gravure printing, the line width of silk screen printing, etc.

[0094] The bills may be securities, banknotes, etc.

[0095] In some embodiments, since the bill quality detection device 100 has a large load mass and a fast scanning speed, in order to ensure the long-term operation accuracy of the bill quality detection device 100, a platform base is set under the detection bracket 10, and the platform base is made of marble. The accuracy of marble can reach 00 level, and the structure is stable and will not deform during long-term operation.

[0096] Example 3

[0097] Based on any of the above embodiments, Fig.10 As shown, the ticket inspection device 41 includes a linear array color camera 411, a linear array lens 412, a filter switching mechanism 413, a depth of field fine-tuning mechanism 414, a linear array light source 415 and a connecting frame 416. The connecting frame 416 is connected to the inspection bracket 10. The depth of field fine-tuning mechanism 414 is slidably connected to the connecting frame 416 so that the depth of field fine-tuning mechanism 414 is close to or away from the inspection station 32. The linear array color camera 411 is connected to the connecting frame 416 to shoot the bill located on the inspection station 32. The linear array lens 412, the linear array lens 412 is connected to the linear array color camera 411. The filter switching mechanism 413 is arranged opposite to the linear array lens 412 to switch the filter used for the linear array lens 412. The linear array light source 415 is arranged opposite to the filter switching mechanism 413, and the linear array light source 415 is arranged between the filter switching mechanism 413 and the inspection station 32.

[0098] In this embodiment, the linear array light source 415 is a linear array diode (Light Emitting Diode, LED for short) light source, and the depth of field fine-tuning mechanism 414 is connected to the linear array color camera 411. The linear array color camera 411 is connected to the linear array lens 412. The filter switching mechanism 413 is arranged opposite to the linear array lens 412, and the filter switching mechanism 413 is arranged below the linear array lens 412, and the linear array light source 415 is arranged opposite to the filter switching mechanism 413, and the linear array light source 415 is arranged below the filter switching mechanism 413 and above the detection station 32.

[0099] In this embodiment, the design resolution of the linear array lens 412 is 0.02 mm / pixel, and an 8K color linear array camera is used in the design. The linear array light source 415 includes two white light fiber optic light sources, two infrared fiber optic light sources with polarization devices, two ultraviolet LED light sources and a white light infrared hybrid reflective LED light source. Through the fiber optic light source controller, all ticket detection contents such as visible light ticket detection, infrared detection, ultraviolet detection, optically variable magnetic ink (Optically Variable Magnetic Ink, referred to as OVMI) detection, and perspective detection can be completed at one detection point. A plurality of filters are provided on the filter switching mechanism 413, and the plurality of filters are used to cooperate with the white light fiber optic light source, the infrared fiber optic light source, the ultraviolet LED light source, and the white light infrared hybrid reflective LED light source.

[0100] The linear array color camera 411 refers to a color camera using a linear array image sensor, which is suitable for high-precision detection. The linear array image sensor is divided into two types: monochrome and color, so the linear array camera is also divided into two types: monochrome and color. The linear array camera provided in this embodiment is color. In addition, compared with the area array camera, the linear array camera has a higher resolution and a faster image acquisition speed, which is more suitable for the detection of dynamic targets. The linear array lens refers to a lens adapted to the linear array color camera. During the quality inspection process, the bill passes under the linear array color camera, and the linear array color camera continuously scans the bill to collect images. The filter switching mechanism 413 is used to switch filters of different colors, or to switch whether to use filters, so that light can be decomposed into different color lights through the filters, which is convenient for image acquisition by the linear array color camera. Among them, the polarization device can make the irradiation light emitted by the light source along a specific direction and can reduce the loss of light energy. Among them, the LED light source has a long life, good stability, and low energy consumption compared with light sources such as halogen lamps. The depth of field fine-tuning mechanism 414 is used to adjust the position of the linear array color camera in the up and down directions, and can make the linear array color camera close to or away from the bill, thereby improving the effect of image acquisition.

[0101] Example 4

[0102] Based on any of the above embodiments, Fig.13 As shown, the thickness detection device 42 includes a three-dimensional measuring instrument 421. The three-dimensional measuring instrument 421 is arranged above the detection station 32. The three-dimensional measuring instrument 421 measures the thickness of the gravure printing ink layer on the ticket surface and forms height information. The Z-axis is designed to have a resolution of 2μm, and three-dimensional data measurement can be performed on a specified point or a local area according to the situation.

[0103] In this embodiment, gravure printing is one of the most important public anti-counterfeiting technologies on banknotes, and the gravure feel is one of the most effective identification methods currently used by the public to identify counterfeits. Considering that the gravure effect is affected by many factors such as gravure pressure, temperature, paper flatness, and ink usage, the most important factors are gravure pressure and gravure ink usage. From the perspective of quality control, in terms of effective measurement and evaluation of the gravure effect, a three-dimensional detection module with a vertical detection accuracy of 1um is used to achieve quantitative detection in the thickness direction of the printed product. By positioning the front and back images separately and detecting the movement of the platform, the three-dimensional detection module is realized to reach a specified position or area. The three-dimensional detection module is used to perform high-precision measurements on the corresponding positions or areas on the front and back to obtain thickness direction data relative to the paper surface. The data of the concave paper surface portion is used to directly describe the gravure effect produced by the gravure pressure. The data of the convex paper surface portion minus the data of the concave portion is used to indirectly describe the gravure effect produced by the gravure ink layer.

[0104] Example 5

[0105] Based on any of the above embodiments, Fig.12 As shown, the line width detection device 44 includes an area array camera 441 , a telecentric lens 442 , and a coaxial light source 443 . The telecentric lens 442 is connected to the area array camera 441 . The coaxial light source 443 is connected to the telecentric lens 442 .

[0106] In this embodiment, a 2464×2056 pixel array camera 441 is selected, with a 5 million pixel level, and a telecentric lens 442 with a magnification of 0.75, and the design resolution reaches 0.005 mm / pixel. The coaxial light source 443 uses a ring light source, and the single-point shooting area is 10 mm×10 mm. The detection point of the array camera 441 is specified during modeling, and the size is smaller than the shooting area. The array camera 441 is used to detect the offset line width and ink color change in the selected area. The size of the selected area is the single-point shooting area.

[0107] In this embodiment, by setting up a line width detection device 44, the thickness of the lines on the bill can be detected and compared with the thickness of the lines of the standard product, including both the line width of offset printing and the line width of gravure printing, so as to detect the quality of the lines on the bill. Among them, the area array camera 441 can accurately capture the width of the lines, and can convert three-dimensional lines with thickness into two-dimensional images to obtain more intuitive two-dimensional image information. In addition, compared with the traditional lens, the telecentric lens 442 can keep the image magnification unchanged within a certain object distance range, that is, the image taken by the telecentric lens 442 does not have a near-large-far-small relationship, which can reduce the influence of the parallax of the traditional lens, thereby making the detection structure more accurate. The ring light source can provide lighting from 360°, the lighting effect is more uniform, and the adverse effects of shadows on line collection are greatly reduced, which helps to improve the accuracy of the detection results. In this way, regardless of whether the bill uses gravure printing technology, the thickness of the lines on the bill can be accurately obtained.

[0108] Among them, the deviation of the detection accuracy of the line width detection device is between -0.01 mm and 0.01 mm, and the average detection accuracy is less than 3NBS.

[0109] By setting the deviation of the detection accuracy of the line width detection device within the range between -0.01 mm and 0.01 mm, the width of the line on the bill can be determined more accurately. NBS represents the unit color difference value, which is used to indicate the degree of color difference. It is known to those skilled in the art that 0 to 0.5 NBS represents a slight color difference, and the contrast between the two colors gives a very slight feeling. 0.5 NBS to 1.5 NBS represents a small color difference, and the contrast between the two colors gives a slight feeling. 1.5 NBS to 3 NBS represents a relatively small color difference, and the contrast between the two colors gives a noticeable feeling. 3 NBS to 6 NBS represents a relatively large color difference, and the contrast between the two colors gives a very obvious feeling. The average detection accuracy of the line width detection device provided in this embodiment is less than 3 NBS, that is, it is possible to determine whether it is the same line by a relatively small color difference, while reducing the possibility that a line and an adjacent line are recognized as one line, so as to improve the reliability of quality detection.

[0110] Example 6

[0111] Based on any of the above embodiments, Figure 3 As shown, the detection device 40 further includes: a coating detection device 43, which is used to detect the brightness difference of the bill. The bill surface detection device 41 is located between the thickness detection device 42 and the coating detection device 43.

[0112] In this embodiment, Figure 2 and Figure 3 As shown, an extended detection point is set on the detection bracket 10, and the extended detection point is used to install a newly added detection device. The newly added detection device provided in this embodiment is a coating detection device 43, which is detachably connected to the detection bracket 10 and is used to detect the brightness difference of the bill. In this way, by setting the coating detection device 43, the detection means and detection ability of the bill quality detection device 100 provided in this embodiment are correspondingly increased, and the comprehensiveness of quality detection is further improved.

[0113] This embodiment sets up extended detection points and reserves interfaces for data communication and power supply of the newly added detection devices to achieve the expansion of the newly added detection devices, thereby adding corresponding detection items and making the bill quality detection more comprehensive. At the same time, by setting up extended detection points, new detection devices can be compatible, and the bill quality detection equipment can be synchronously updated according to the possible detection level in the future, which can not only improve the detection capability of the bill quality detection equipment provided by this embodiment, but also further improve the comprehensiveness of quality detection.

[0114] In some other embodiments, the newly added detection device may be a detection device for detecting other detection items. In this way, by setting up the extended detection points, the new detection device can be compatible, and the bill quality detection device 100 can be synchronously updated according to the possible detection level in the future to ensure the detection capability and detection level of the bill quality detection device 100 provided in this embodiment.

[0115] In this embodiment, along the extension direction of the motion guide rail 31, the bill face detection device 41 is in the middle, and the thickness detection device 42 and the coating detection device 43 are respectively arranged on both sides of the bill face detection device. Since the bill face detection device 41 has many components and a large overall mass, the bill face detection device 41 is arranged in the middle position between the thickness detection device 42 and the coating detection device 43, which helps to balance the load at various positions of the quality detection device, thereby ensuring that the bill quality detection device 100 is more stable when in use.

[0116] Example 7

[0117] Based on any of the above embodiments, Fig.11 As shown, the coating detection device 43 includes a deep ultraviolet camera 431, a matching lens 432 and a dome light source 433. The matching lens 432 is connected to the deep ultraviolet camera 431. The dome light source 433 is arranged opposite to the matching lens 432, and the dome light source 433 is arranged between the matching lens 432 and the detection station 32.

[0118] In this embodiment, the deep ultraviolet camera 431 is connected to the matching lens 432. The dome light source 433 is arranged opposite to the matching lens 432, and the dome light source 433 is arranged below the matching lens 432 and above the detection station 32. The coating detection device 43 provided in this embodiment uses a deep ultraviolet camera 431 with a specific band lens to perform coating detection on the bill, and uses a dome light source 433 with a UV wavelength of 256 mm to achieve "large angle" imaging in a small space through two reflections. The early imaging experiment has good results, and the contrast of coating defects is obvious.

[0119] After the product paper is coated with glue, there is a brightness difference between the coated area and the uncoated area under the condition that the camera and the light source are at a large angle. For example, Fig.19 The uncoated product is shown, with an average brightness of 100 for the entire image. The white paper, offset area has an average brightness of 130. The darkest area of ​​the gravure area has a brightness of 60. Fig. 20 The average brightness of the uncoated product is 80. The average brightness of the white paper and offset printing area is 100. The brightness of the darkest area of ​​the gravure printing area is 40. It can be seen that the grayscale value of the coated and uncoated white paper area can reach a difference of 15% to 20%. Therefore, the quality of the bill coating effect can be obtained by detecting the brightness on the bill and comparing it with the bill sample.

[0120] Example 8

[0121] Based on any of the above embodiments, Figure 3 As shown, the bill quality detection device 100 further includes a position adjustment rail 33, which is connected to the detection bracket 10 and is arranged opposite to the motion rail 31. The thickness detection device 42 and the line width detection device 44 are respectively slidably connected to the position adjustment rail 33, so that the thickness detection device 42 and the line width detection device 44 can approach or move away from the motion rail 31.

[0122] In this embodiment, the position adjustment rail 33 is connected to the detection bracket 10, and the position adjustment rail 33 is connected to the thickness detection device 42 and the line width detection device 44. The extension direction of the position adjustment rail 33 is the front-back direction.

[0123] The bill quality inspection device 100 provided in this embodiment can respectively arrange the thickness inspection device 42 and the line width inspection device 44 on opposite sides of a bracket by setting the position adjustment guide rail 33, so that the thickness inspection device 42 and the line width inspection device 44 can be translated in the front-back direction, perpendicular to the left-right translation movement direction of the inspection station 32, so that the position adjustment guide rail 33 and the motion guide rail 31 cooperate with each other, so that the thickness inspection device 42 and the line width inspection device 44 can perform quality inspection on the entire width of the bill.

[0124] In the embodiment, Fig.14 As shown, the number of position adjustment guide rails 33 is one, the thickness detection device 42 and the line width detection device 44 are connected to the same bracket, the bracket is connected to the position adjustment guide rail 33, and can reciprocate along the extension direction of the position adjustment guide rail 33, so that the thickness detection device 42 and the line width detection device 44 share one position adjustment guide rail 33.

[0125] The three-dimensional measuring instrument 421 is connected to the position adjustment rail 33 and is disposed above the inspection station 32 .

[0126] Example 9

[0127] On the basis of Example 1, Figure 2 and Figure 6 As shown, the bill quality detection device 100 further includes a material bin 20, which is used to place bills, and the material bin 20 is connected to the detection bracket 10. There are two material bins 20, which are respectively arranged at two opposite ends of the moving guide rail 31; or there is one material bin 20, which is arranged at either end of the opposite ends of the moving guide rail 31.

[0128] In this embodiment, the material bin 20 is divided into a feed bin 21 and a discharge bin 22. The feed bin 21 is used to place bills to be inspected, and the discharge bin 22 is used to place bills that have completed front or back inspection. It is not necessary to place bills one by one on the inspection station 32, which helps to improve the inspection efficiency.

[0129] In this embodiment, the feed bin 21 and the discharge bin 22 are respectively connected to the detection bracket 10, the feed bin 21 is arranged at the left end position of the detection bracket 10, and the discharge bin 22 is arranged at the right end position of the detection bracket 10, and the feed bin 21 and the discharge bin 22 are both arranged at the front side position of the detection bracket 10, that is, the feed bin 21 and the discharge bin 22 are arranged on the same side of the detection bracket 10, which is convenient for taking and putting bills.

[0130] The feed bin 21 is used to place bills to be inspected, and the discharge bin 22 is used to place inspected bills. By reasonably setting the positions of the feed bin 21 and the discharge bin 22, the length and width of the bill quality inspection device 100 can be controlled.

[0131] Example 10

[0132] like Fig. 9 As shown, an in-warehouse station 211 and a size adjustment mechanism 212 are provided in the silo 20. The in-warehouse station 211 is used to place bills, and the size adjustment mechanism 212 is connected to the in-warehouse station 211 to adjust the size of the in-warehouse station 211 according to the face size of the bills.

[0133] The feed bin 21 provided in this embodiment includes a size adjustment mechanism 212, which surrounds a work station 211 in the bin. The size of the work station 211 in the bin can be adjusted by moving the components of the size adjustment mechanism 212 forward, backward, left and right, so as to place bills of different sizes in the feed bin 21 and place the bills at the exact position on the feed bin 21, thereby facilitating the transfer of the bills to the exact position on the detection station 32 through auxiliary tools or auxiliary devices, so as to improve the accuracy of the detection results.

[0134] It can also be understood that the discharge bin 22 has the same shape and structure as the feed bin 21 .

[0135] Embodiment 11

[0136] On the basis of Example 1, Figure 2 and Figure 6 As shown, the bill quality detection device 100 further includes: a bill taking and placing device 70, which is arranged between the material bin 20 and the detection station 32. The bill taking and placing device 70 is used to take and place bills between the material bin 20 and the detection station 32.

[0137] In this embodiment, the bill in the feed bin 21 can be transferred to the detection station 32 by the bill pick-up and placement device 70. After the bill passes through the detection device 40 along the motion guide rail 31 at the detection station 32, the bill on the detection station 32 can be transferred to the discharge bin 22 by the bill pick-up and placement device 70. Thus, the speed of bill transmission is improved by providing the bill pick-up and placement device 70.

[0138] Example 12

[0139] like Figure 6 and Figure 7 As shown, the bill taking and placing device 70 includes: a transfer rail 72 and an adsorption mechanism 74, and the transfer rail 72 is connected to the detection bracket 10. The adsorption mechanism 74 is slidably connected to the transfer rail 72. The adsorption mechanism 74 is used to take out the bills in the silo 20 and place them on the detection station 32; or the adsorption mechanism 74 is used to take out the bills on the detection station 32 and place them in the silo 20.

[0140] In this embodiment, a bill pick-up and placement device 70 is provided between the feed bin 21 and the detection station 32. The bill pick-up and placement device 70 includes a feed transfer guide rail 34 and a feed adsorption device 36. A bill pick-up and placement device 70 is provided between the discharge bin 22 and the detection station 32. The transfer guide rail 72 is divided into a feed transfer guide rail 34 and a discharge transfer guide rail 35. The adsorption mechanism 74 is divided into a feed adsorption device 36 and a discharge adsorption device 37. This helps to place the bill at an accurate position on the detection station 32 after the bill in the feed bin 21 is transferred to the detection station 32 by the feed adsorption device 36, so as to improve the accuracy of the detection result.

[0141] Among them, the feed transfer guide rail 34 is arranged corresponding to the feed bin 21, and the feed transfer guide rail 34 and the feed bin 21 are both arranged at the left end of the detection bracket 10. The feed transfer guide rail 34 is connected to an feed adsorption device 36, and the feed adsorption device 36 cooperates with the feed transfer guide rail 34 to transfer the bills in the feed bin 21 to the detection station 32. The discharge transfer guide rail 35 is arranged corresponding to the discharge bin 22, and the discharge transfer guide rail 35 and the discharge bin 22 are both arranged at the right end of the detection bracket 10. The discharge transfer guide rail 35 is connected to a discharge adsorption device 37, and the discharge adsorption device 37 cooperates with the discharge transfer guide rail 35 to transfer the bills on the detection station 32 to the discharge bin 22.

[0142] The feed bin 21 and the discharge bin 22 provided in this embodiment are used for placing banknotes and receiving banknotes, respectively. The specific workflow is as follows: first, a group of product bills are placed in the feed bin 21, and the product is adsorbed and placed on the detection station 32 by the feed adsorption device 36. The motion guide rail 31 drives the detection station 32. After completing various fine inspections, the discharge adsorption device 37 adsorbs and transfers the product to the discharge bin 22. At the same time, the detection station 32 returns to the origin of the feed bin to wait for the second product to be placed, and so on. Compared with the synchronous operation of the feed bin 22, this operation mode has an additional discharge operation time of about 5 to 10 seconds. Such parallel processing can effectively improve the product circulation efficiency.

[0143] In this embodiment, in order to reasonably set the size, the positions of the feed bin 21 and the discharge bin 22 are set, and the operation of bill entry and exit is adjusted to enter and exit the bin at the two ends of the detection bracket 10, so that the two bins are respectively set at the two ends of the platform. Therefore, in some embodiments, the overall appearance size (length×width×height) of the quality inspection equipment can be made not to exceed the range of 1400 mm×1600 mm×2000 mm.

[0144] In this embodiment, Figure 8 As shown, taking the feed adsorption device 36 as an example, the feed adsorption device 36 includes a suction cup 361, an air circuit 362, a spring device 363 and an in-place photoelectric device 364. The suction cup 361 is used to adsorb the bill. One end of the air circuit 362 is connected to the suction cup 361, and the other end of the air circuit 362 is connected to the vacuum device. The spring device 363 is used to enable the suction cup 361 to move up and down. The suction cup 361 can move upward at the moment when the suction cup 361 contacts the bill to achieve a vibration reduction effect, and the suction cup 361 can be pressed downward to completely contact the bill to prevent the bill from falling off during transportation or bending after being transported to the detection station 32. The in-place photoelectric device 364 is used to detect the position of the feed adsorption device 36 so that the suction cup 361 can be lowered to a suitable position to absorb the bill and place the bill on the detection station 32.

[0145] Embodiment 13

[0146] On the basis of Example 1 or Example 2, Figure 4 and Figure 5As shown, the detection station 32 includes a detection platform 322, a pressure plate guide rail 326, a pressure plate guide column 324 and a pressure plate assembly 320. The detection platform 322 is slidably connected to the motion guide rail 31, and the detection platform 322 is used to place bills. The pressure plate guide rail 326 is connected to the detection platform 322. One end of the pressure plate guide column 324 is connected to the pressure plate guide rail 326. The pressure plate assembly 320 is slidably connected to the pressure plate guide rail 326, and the pressure plate assembly 320 is connected to the pressure plate guide column 324, so that the pressure plate assembly 320 approaches the detection platform 322 along the pressure plate guide column 324 and cooperates with the detection platform 322 to clamp the bill.

[0147] In this embodiment, the testing platform 322 is slidably connected to the moving guide rail 31, and the testing platform 322 is used to place the bill. The pressure plate guide rail 326 is connected to the testing platform 322, and the pressure plate assembly 320 is connected to the pressure plate guide rail 326. The extension direction of the pressure plate guide rail 326 is the left-right direction. The pressure plate assembly 320 can be translated in the left-right direction and moved to the upper part of the testing platform 322. The pressure plate assembly 320 is connected to the pressure plate guide column 324, and the extension direction of the pressure plate guide column 324 is the up-down direction. In this way, after the pressure plate assembly 320 moves to the upper part of the testing platform 322, it moves downward along the pressure plate guide column 324, so that the pressure plate assembly 320 and the testing platform 322 cooperate with each other to clamp the bill. In this way, the bill can be fixed to reduce the possibility of the bill moving during the detection process, and the bill can be flattened to avoid problems such as folding and curling, which is convenient for bill detection, thereby obtaining more accurate detection results.

[0148] Embodiment 14

[0149] On the basis of Example 1 or Example 2, Figure 4 and Figure 5 As shown, the platen assembly 320 includes a platen frame 323 and a first glass plate 321 , wherein the first glass plate 321 is disposed in the platen frame 323 .

[0150] In this embodiment, a first glass plate 321 is provided in the platen frame 323, and the platen frame 323 is connected to a platen guide post 324, and the platen guide post 324 extends in an up-down direction, so that after the platen frame 323 moves to the top of the detection platform 322, it moves downward along the platen guide post 324, so that the first glass plate 321 and the detection platform 322 cooperate with each other to clamp the bill. In addition, the first glass plate 321 can also be a transparent plate made of other materials, such as a transparent resin plate, a transparent plastic plate, etc.

[0151] In this embodiment, Figure 5 As shown, the pressure plate assembly 320 also includes a correction plate 325, which is located on the right side of the detection platform 322 and is used to correct the position of the pressure plate frame 323 so that after the pressure plate frame 323 moves downward along the pressure plate guide column 324, the bill can be observed through the first glass plate 321.

[0152] In this embodiment, Figure 2 and Figure 5 As shown, a second glass plate 327 is provided on the detection table 322 for placing bills and clamping the bills in cooperation with the first glass plate 321. A perspective light source 45 is provided below the detection station 32. The perspective light source 45 is arranged opposite to the bill face detection device 41. The light emitted by the perspective light source 45 is suitable for passing through the first glass plate 321 and the second glass plate 327, so that the bill face detection device 41 can be used to detect the hollowing effect of the bill face.

[0153] The inspection station 32 provided in this embodiment is provided with double-layer glass. The feed adsorption device 36 places the bill on the second glass plate 327, and the first glass plate 321 is driven by a motor to press the product to achieve clamping and flattening of the product. By arranging a perspective light source 45 and cooperating with the bill surface detection device 41, perspective imaging can be performed. The illumination light of the perspective light source 45 is irradiated from bottom to top to perform perspective detection on the bill on the second glass plate 327, such as detecting the hollow graphics and texts on the bill, especially the quality of watermarks and security lines, thereby further improving the comprehensiveness of bill quality detection. For example, for the hollow security line, a color array camera with a resolution of 0.02 mm / pixel is used, and a red light source is used as the illumination light source. The following information is obtained in the perspective imaging mode: Fig.21 This allows you to capture the hollowed-out effect of the security thread on the bill.

[0154] Embodiment 15

[0155] Based on any of the above embodiments, Fig.15 As shown, the bill quality detection device 100 includes a chassis 50 and a display control device 60 .

[0156] In this embodiment, the detection bracket 10 and the motion guide rail 31 are arranged in the chassis 50 (not visible). The display control device 60 is arranged on the chassis 50. Two doors 51 are provided on the chassis 50, and the two doors 51 correspond to the feed bin 21 and the discharge bin 22 respectively.

[0157] Some embodiments of the present application provide a bill quality evaluation device 200 .

[0158] Example 16

[0159] like Fig.16 As shown, the bill quality evaluation device 200 includes the bill quality detection device 100 in any of the above embodiments and a processor 210. The processor 210 is connected to the detection device 40 for communication to obtain the detection data of the detection device 40 and process it to generate a quality evaluation report.

[0160] In this embodiment, the bill quality detection device 100 is used to detect the bill quality and generate a detection result. The processor 210 is connected to the bill quality detection device 100 and is used to perform data processing on the detection result and generate a quality evaluation report.

[0161] The bill quality evaluation device 200 provided in this embodiment includes the bill quality detection device 100 of any one of the above embodiments, and thus has all the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0162] In addition, by obtaining the generated quality evaluation report, the bill can be evaluated intuitively, objectively and comprehensively, which can not only judge the printing quality of the finished bill, but also more accurately provide feedback on quality problems in the printing and production process of the bill, making it easier to discover quality problems in the bill, thereby guiding relevant personnel to control the production quality of the bill and better and more quickly improve the industry's printing quality control level.

[0163] Some embodiments of the present application provide a method for detecting bill quality.

[0164] Embodiment 17

[0165] like Fig.17 As shown, the bill quality detection method provided in this embodiment includes:

[0166] Step S10: placing the bill on the inspection station;

[0167] Step S30: the detection station moves horizontally along the first guide rail so that the bill passes through multiple types of detection devices in sequence;

[0168] Step S50: the detection device collects images of the bill and obtains a set of image features;

[0169] Step S70: obtaining feature information corresponding to the printing process of the bill according to the image feature set;

[0170] Step S80: Summarize the feature information to generate a quality evaluation report.

[0171] In this embodiment, the printing process includes an offset printing process, a gravure printing process, a code printing process, a silk screen printing process, a coating process, a cutting process and an anti-counterfeiting process. According to the printing process of the bill, a number of detection items are set, wherein the printing process includes an offset printing process, a gravure printing process, a code printing process, a silk screen printing process, a coating process, a cutting process and an anti-counterfeiting process. The detection station is driven to translate along the motion guide rail so that the bill passes through the detection device 40; the bill is detected item by item according to the number of detection items to obtain the characteristic information of the number of detection items of the bill through the detection device, wherein the characteristic information includes offset printing characteristic information, gravure printing characteristic information, code printing characteristic information, silk screen printing characteristic information, coating characteristic information, cutting characteristic information and anti-counterfeiting characteristic information. The characteristic information of the number of detection items of the bill is summarized to form the detection result of the bill quality.

[0172] The step of setting the detection items is executed before step S70 , and has no execution order with step S10 and step S50 .

[0173] In this embodiment, the bill is placed on the inspection station; several inspection items are set according to the printing process of the bill, wherein the printing process includes offset printing process, gravure printing process, code printing process, silk screen printing process, coating process, cutting process and anti-counterfeiting process. The inspection station is driven to translate along the motion guide rail so that the bill passes through the inspection device 40 to collect an image of the bill and obtain an image feature set. Feature information corresponding to the printing process is extracted from the image feature set. The feature information of several inspection items of the bill is summarized to form a bill quality inspection result.

[0174] The bill quality detection method provided in this embodiment can obtain the image of the bill by capturing the image of the bill. The image includes the features left on the bill by each printing process. By extracting these features, the quality control of the production process can be more accurately fed back, thereby effectively obtaining the quality of the bill printing process and the quality of the bill product. The image acquisition method is relatively simple and fast, and is suitable for the process of detecting and evaluating multiple bills. At the same time, when capturing the image, the detection device does not need to contact the bill and will not damage the bill.

[0175] The bill quality detection method provided in this embodiment sets several detection items according to the printing process of the bill, can judge the overall printing quality of the bill from the perspective of process, and can more accurately provide feedback on the quality control of the bill in each printing process, thereby improving the industry's printing quality control level more quickly and more specifically.

[0176] In addition, it can be understood that different printing processes form different characteristics in the production process of bills, and the several detection items set up in this way can better reflect the quality level of bills. At the same time, by obtaining the characteristic information corresponding to the above-mentioned printing process, the defects of the above-mentioned printing process in the production process of bills can be discovered more quickly, and more intuitive detection results can be obtained. Furthermore, by obtaining offset printing characteristic information, gravure printing characteristic information, code printing characteristic information, silk screen printing characteristic information, coating characteristic information, cutting characteristic information and anti-counterfeiting characteristic information, the quality of bills can be detected from multiple angles of the bills, which can improve the comprehensiveness of bill quality detection, and thus facilitate objective and comprehensive comprehensive evaluation of the overall quality of the bills.

[0177] Embodiment 18

[0178] like Fig.18 As shown, feature information corresponding to the printing process of the bill is obtained according to the image feature set, specifically including:

[0179] Step S72: extracting the image feature set formed on the bill by the offset printing process in the printing process to obtain offset printing feature information;

[0180] Step S74: extracting the image feature set formed on the bill by the gravure printing process in the printing process to obtain gravure printing feature information;

[0181] Step S76: extracting the image feature set formed on the bill by the code printing process in the printing process to obtain the code printing feature information;

[0182] Step S78: extracting the image feature set formed on the bill by the silk-screen printing process in the printing process to obtain silk-screen feature information;

[0183] Step S710: extracting the image feature set formed on the bill by the coating process in the printing process to obtain coating feature information;

[0184] Step S712: extracting the image feature set formed on the bill by the cutting process in the printing process to obtain cutting feature information;

[0185] Step S714: extracting the image feature set formed on the bill by the anti-counterfeiting process in the printing process to obtain anti-counterfeiting feature information;

[0186] Among them, the offset printing feature information includes: offset printing defect feature information, offset printing ink color feature information, overprinting feature information, offset printing wiring feature information, color mixing feature information, offset printing line width feature information, anti-copying mark feature information, and colored fluorescent feature information. The gravure printing feature information includes: gravure printing defect feature information, gravure ink color feature information, gravure overprint feature information, gravure wiring feature information, gravure line width feature information, infrared feature information, and thickness measurement feature information. The code printing feature information includes: number printing defect feature information and colorless fluorescent feature information. The silk screen printing feature information includes: silk screen printing defect feature information and optical gradient magnetic ink feature information. The coating feature information includes: coating defect feature information. The anti-counterfeiting feature information includes: watermark feature information and security line feature information. The cutting feature information includes: cutting size feature information and squareness feature information.

[0187] It can be understood that the above steps are parallel steps and there is no order of execution. In addition, through step S30, the detection station 32 is driven to translate along the motion guide rail 31, so that the bill passes through the bill face detection device 41, the thickness detection device 42, and the line width detection device 44 in sequence, and the above printing process can be detected item by item, thereby obtaining more comprehensive feature information, so as to obtain more comprehensive, objective and complete test results. At the same time, the characteristic information of several detection items after aggregation can provide comprehensive data support for the all-round evaluation of the bill quality, which is convenient for the objective and comprehensive evaluation of the overall quality of the bill.

[0188] In this embodiment, a number of inspection items are set according to the printing process of the bill, wherein the printing process includes an offset printing process, a gravure printing process, a code printing process, a silk screen printing process, a coating process, a cutting process and an anti-counterfeiting process. The inspection station is driven to translate along the motion guide rail so that the bill passes through multiple inspection devices in sequence. The bill is inspected item by item according to the number of inspection items to obtain characteristic information of the number of inspection items of the bill through the inspection device, wherein the characteristic information includes offset printing characteristic information, gravure printing characteristic information, code printing characteristic information, silk screen printing characteristic information, coating characteristic information, cutting characteristic information and anti-counterfeiting characteristic information. The bill is turned over and the other side of the bill is inspected. The characteristic information of the number of inspection items of the bill is summarized to form the inspection result of the bill quality.

[0189] It can be understood that step S10 and step S30 are used to perform quality inspection on one of the front side or the back side of the bill. After the inspection is completed, the bill is turned over and reset to the inspection station to perform quality inspection on the other side of the bill. The step of inspecting the other side of the bill includes step S10 and step S30, that is, the previous steps are executed again. After the inspection of the front side and the back side of the bill is completed, step S80 is executed.

[0190] Embodiment 19

[0191] In combination with the bill quality detection device in the above embodiment, Fig. 22 As shown, the bill quality detection method provided in this embodiment includes:

[0192] Step S101: placing the bill in the feed bin;

[0193] Step S102: The bills in the feed bin are transferred to the inspection station through the adsorption mechanism;

[0194] Step S501: driving the detection station to translate along the motion guide rail;

[0195] Step S711: using a coating detection device to complete coating detection on the front side of the bill;

[0196] Step S713: using a ticket inspection device to complete printing quality inspection, infrared and ultraviolet inspection, and perspective inspection on the front of the ticket;

[0197] Step S715: using a thickness detection device to detect the thickness of the gravure printing on the front of the bill;

[0198] Step S717: using a line width detection device to complete line width detection on the front side of the bill;

[0199] Step S103: The bills on the inspection station are transferred to the discharge bin by the adsorption mechanism;

[0200] Step S104: Turn the bill over and send it back to the feed bin;

[0201] Step S105: The bills in the feed bin are transferred to the inspection station again through the adsorption mechanism;

[0202] Step S502: driving the inspection station to translate along the motion guide rail again;

[0203] Step S719: using a coating detection device to complete coating detection on the back of the bill;

[0204] Step S721: Use the ticket inspection device to complete the printing quality inspection, infrared and ultraviolet inspection, and perspective inspection of the back of the ticket;

[0205] Step S723: using a thickness detection device to detect the thickness of the gravure printing on the back of the bill;

[0206] Step S725: using a line width detection device to complete line width detection on the back of the bill;

[0207] Step S106: The bills on the inspection station are transferred to the discharge bin through the adsorption mechanism again.

[0208] Among them, step S711, step S713, step S715, and step S717 are parallel steps and have no order of execution; step S719, step S721, step S723, and step S725 are parallel steps and have no order of execution.

[0209] The bill quality detection method provided in this embodiment automatically completes the detection of bill quality by feeding the bill into the feed bin 21, and the bill quality detection device 100 controls the operation of each component according to the program. Among them, the step of turning over the bill in step S104 can be done by manually taking the bill out of the discharge bin and turning it over, or it can be done by the bill quality detection device. In this way, most or most of the quality detection work is completed by the bill quality detection device, eliminating the influence of human factors in the detection process and ensuring the accuracy of the detection results. At the same time, a set of bill quality detection equipment can be used to detect multiple bills for several detection items, ensuring the consistency of the detection standards and detection levels of multiple bills, which is helpful for evaluating multiple bills, and then establishing a system for quantitative detection and analysis of bills, realizing the digitalization and objective evaluation of quantitative detection and analysis, reducing the intervention and labor intensity of manual evaluation, improving the evaluation efficiency and evaluation repeatability in the detection, and facilitating the quality control of bill products in actual production.

[0210] The following is an explanation of the bill quality detection device, bill quality evaluation device and bill quality detection method provided by the present application with some specific embodiments.

[0211] As the People's Bank of China raises its requirements for the quality of banknote printing and issuance, the head office and its subordinate banknote printing companies have become more and more urgent in their demand for high-precision equipment to evaluate the quality of banknotes. The industry needs an instrument that can accurately and quantitatively analyze the quality of banknote printing, test the various quality indicators of finished banknotes, and thus objectively and effectively evaluate the product quality of each company. This quantitative evaluation can not only judge the finished product printing quality of the product, but also provide more accurate feedback on the process quality control of product production, thereby better and more quickly improving the industry's printing quality control level.

[0212] At present, the online quality control equipment equipped by various enterprises in the industry is all focused on controlling quality defects. Although it can accurately and effectively intercept various quality defects, it cannot well evaluate the consistency of product quality due to the working condition limitations of online detection equipment and the difference between equipment. Although some offline detection and analysis equipment can quantitatively analyze some quality indicators, they all serve process control, and there is no type of equipment that can comprehensively evaluate the final small-sheet products. Therefore, the detection of small-sheet products, especially the integrated detection and analysis system for the size of the final small-sheet products, the relationship between various printing overprints, ink color, gravure effect, product coating quality and machine-readable information, is still blank in the industry.

[0213] The development of this system will fill the gap in the precise quantitative detection of the final product quality of small sheets, and will cover the detection capabilities to areas that previous systems have never been able to cover. It will definitely play a very important role in improving the printing quality of the industry, thereby further improving the industry's global leading level in the field of quality control. When the application is mature, it can be promoted to international printing companies.

[0214] To this end, this application provides a high-precision measurement and analysis equipment that can conduct comprehensive quality inspection and evaluation of small RMB products, and establish a set of objective and comprehensive banknote comprehensive evaluation standards. The equipment can quantitatively inspect and analyze the full face information of small products before leaving the factory, such as the appearance size, front and back face, perspective image, red and ultraviolet image, special anti-counterfeiting information, and gravure effect, to replace the current inspection equipment used by the banknote inspection, and solve the problem of inconsistent measurement standards caused by excessive reliance on manual judgment in the quality judgment of banknotes in the industry. The equipment can integrate the test data of other machine-readable detection equipment and issue a unified quality analysis report. In addition, establishing a set of industry-level or even national-level comprehensive evaluation standards for banknotes as a basis for quantitative evaluation of the quality of small banknotes can not only guide relevant personnel to control production quality, but also effectively take into account the complex needs between "reducing costs and increasing efficiency" and "improving quality and increasing efficiency".

[0215] Specifically, the bill quality inspection equipment is equipped with a bill face inspection device, which is used to inspect the printing quality of the bill, including the printing quality of the offset printing process, the printing quality of the gravure printing process and the printing quality of the silk screen printing process. Among them, the inspection items of the offset printing process include: offset printing defects, ink color, offset overprint, wiring, color mixing, anti-copying marks, and colored fluorescence. The inspection items of the gravure printing process include: gravure printing defects, ink color, gravure overprint, wiring, line width, infrared, and thickness measurement; the inspection items of the silk screen printing process include silk screen defects: plate running, smearing, missing prints, empty flowers, etc., and the position, width, brightness, and missing of the OVMI (Optically Variable Magnetic Ink) scroll bar.

[0216] The bill quality inspection equipment is equipped with a thickness detection device to detect the thickness of the gravure printing process.

[0217] The bill quality inspection equipment is equipped with a coating inspection device to inspect the quality of the coating process and detect whether there is any missing print. It adopts the national standard coating inspection method with light source and large-angle imaging. The coated area is highlighted, while the brightness of the uncoated area is significantly lower than the coating brightness. The minimum detectable coating missing print area in white paper and offset printing area is: 10 mm × 10 mm.

[0218] The quality inspection equipment for bills is equipped with a perspective inspection device, including a perspective light source, which cooperates with the bill surface inspection device to detect the integrity and position of the watermark, whether there is any plate deviation or U-turn, the number of windows in the security line, the window opening effect, reverse line, hollowing, and defects such as broken line, knotted line, double line, etc.

[0219] The bill quality inspection equipment is equipped with a line width detection device, which is used to detect the width of the offset printing lines in the offset printing process.

[0220] In summary, the bill quality inspection device provided in this specific embodiment can perform the following inspection items on the bill, including: printing defect inspection, overprint inspection, wiring inspection, printing inspection, ink color analysis inspection, number inspection, OVMI integrity inspection, optical variable inspection, infrared inspection, fluorescence inspection, security line inspection, watermark inspection, cutting size inspection, printed product thickness inspection, coating inspection. In this way, a comprehensive product quality inspection can be performed on the bill.

[0221] In some specific embodiments, in offset printing line measurement, the line width detection accuracy deviation range is between -0.01 mm and 0.01 mm, and can distinguish between colors, with an average detection accuracy of ≤3NBS.

[0222] In some specific embodiments, the gravure overprint detection is performed on the product to detect the gravure overprint position relationship and provide X and Y tolerance results. The detection accuracy ranges from -0.1 mm to 0.1 mm.

[0223] In some specific embodiments, wiring detection: the wiring quality of the product is detected, and the detection accuracy of white exposure ranges from -0.1 mm to 0.1 mm.

[0224] In some specific embodiments, the size measurement measures the size of the paper in the horizontal and vertical directions, with a detection accuracy ranging from -0.1 mm to 0.1 mm.

[0225] In some specific embodiments, the printed product thickness (gravure printing effect) detection can be achieved, and the detection accuracy ranges from -2 microns to 2 microns.

[0226] In some specific embodiments, in the continuous detection mode, the average detection time of a single sheet (the detection time of the front and back of the same sheet is superimposed) (excluding the extended detection items, including 5 thickness detection points and 5 area array camera detection points) does not exceed 6 minutes per sheet. Among them, each thickness detection point collects 5 lines of data.

[0227] In some embodiments, it is necessary to perform quality inspection on both the front and back of the bill, and the printing effect of the offset printing process on the front and back of the bill can be inspected by a bill inspection device, wherein the positioning accuracy of each inspection device ranges from -0.02 mm to 0.02 mm (mm / 1000 mm).

[0228] The workflow of the bill quality inspection equipment is as follows Fig. 22 As shown, first set the bill in the feed bin; transfer the bill from the feed bin to the inspection station through the adsorption mechanism; the inspection station moves along the extension direction of the motion track, passes through multiple inspection points in sequence, and is below the inspection device; completes the front coating inspection, front infrared, ultraviolet, perspective inspection, front thickness inspection, and front area array camera inspection (line width inspection) of the bill; transfers the bill from the inspection station to the discharge bin through the adsorption mechanism; takes the bill out of the discharge bin, flips it, and puts the flipped bill into the feed bin; transfers the bill from the feed bin to the inspection station through the adsorption mechanism; the inspection station moves along the extension direction of the motion track, passes through multiple inspection points in sequence, and is below the inspection device; completes the back coating inspection, back infrared, ultraviolet, perspective inspection, back thickness inspection, and back area array camera inspection (line width inspection) of the bill; takes the bill out of the discharge bin to complete the entire inspection process.

[0229] In some specific embodiments, the various detection devices of the bill quality detection equipment will form a unified hardware and software interface standard, and design a reserved interface (solution). New detection devices (sensors in the detection devices) can be developed according to the standard to achieve the expansion of equipment functions.

[0230] At the same time, the quality inspection equipment reserves the inspection interface with other machine-readable quantitative inspection instruments. The inspection data is integrated into the analysis and evaluation system through the prefix number, which is compatible with new anti-counterfeiting technologies that may be applied to new products in the future. Among them, considering the consistency, the product needs to be automatically transferred between different inspection stations. The platform design uses negative pressure data and plans to use quantitative detectors for quantitative inspection and standardize the data fusion interface in future inspection software version upgrades. Fluorescence and magnetic quantitative detectors plan to increase the design and standardize the data fusion interface during the project promotion process. Other new anti-counterfeiting technology inspection instruments need to reserve corresponding data fusion interfaces when designing.

[0231] Furthermore, the bill quality detection equipment provided in this specific embodiment is equipped with a set of comprehensive evaluation standards for banknotes, which covers information such as face size, face quality, machine-readable data, and printed product thickness. By adopting a unified detection platform and a unified expert database, integrating the detection data of itself and other machine-readable quantitative detection equipment, and combining the actual production of the printing industry, an applicable evaluation system is established. And the detection results are used to serve the enterprise information platform. In this way, it is helpful to realize digitalization and objective evaluation based on quantitative detection analysis, reduce the intervention and labor intensity of manual judgment of testers, improve the evaluation efficiency and evaluation repeatability in detection, and facilitate quality control in actual production.

[0232] In addition, bill quality inspection equipment can quantitatively obtain process data such as color information and printing patterns, line edge roughness, line width and other image geometric information of various product bills. Through moderate openness and integration, it can bring some new practical functions that are convenient for banknote quality analysts and new product developers to use.

[0233] It can be seen that the bill quality detection device provided by this application has at least the following advantages:

[0234] 1. Conduct a comprehensive product quality test on the bills. This includes:

[0235] Detect the number of the bill; detect the infrared and ultraviolet features of the bill; have the ability to perform fine detection through comprehensive detection of visible light, infrared, and perspective; can effectively detect perspective features such as security lines and counter-printing; can meet the needs of new product feature upgrades, such as providing quality evaluation standards and detection and analysis methods for hollow security lines, OVMI, high-definition watermarks, coatings, etc. Reduce the impact of gravure printing effects on gravure printing pressure, temperature, ink usage, and other factors.

[0236] 2. The evaluation criteria are more scientific and the analysis results are more objective.

[0237] Compared with existing testing methods, the quality testing and scoring results of quality testing equipment no longer rely too much on ink color consistency, avoiding the results being less objective. For example, if a product has major defects in the printed appearance and good ink color consistency, its score may be very high; while a product with exquisite printing and slightly different ink color will have a very low score.

[0238] 3. Avoid relying on manual labor. Compared with the existing safety lines, numbers, silk screens and other quality analysis and evaluation work can only be done manually. The manual evaluation results are not objective enough, easily affected by environmental and psychological factors, and it is difficult to achieve unified quantification according to the standards.

[0239] 4. The quality inspection equipment of the bill is organically combined with the machine-readable evaluation. It includes the machine-readable inspection and analysis part, compatible with the evaluation criteria, and reduces the manual processing of the evaluation results of various equipment in the report.

[0240] In the embodiments according to the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments according to the present invention can be understood according to specific circumstances.

[0241] In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the embodiments of the present invention.

[0242] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments according to the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0243] The above are only preferred embodiments according to the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various modifications and changes may be made according to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Claims

1. A bill quality detection device, used to detect the quality of bills, characterized in that: The bill quality detection device comprises: Detection bracket; A motion guide rail, the motion guide rail is connected to the detection bracket; An inspection station, the inspection station is used to place the bill, and the inspection station is slidably connected to the motion guide rail; A detection device, the detection device is connected to the detection bracket and is arranged above the detection station, so that the detection device performs various quality defect detections on the bill moving along the motion guide rail; The detection device comprises: A ticket face detection device, the ticket face detection device is used to detect the printing quality of the ticket; A thickness detection device, the thickness detection device is used to detect the intaglio thickness of the bill; A line width detection device, the line width detection device is used to detect the offset printing line width and ink color changes of the bill; Wherein, the ticket face detection device, the thickness detection device and the line width detection device are spaced apart from each other along the motion guide rail and are respectively connected to the detection bracket; The ticket detection device includes a linear array lens and a filter switching mechanism; The filter switching mechanism is arranged opposite to the linear array lens to switch the filter used for the linear array lens; The ticket detection device also includes: A connecting frame connected to the detection bracket; A depth-of-field fine-tuning mechanism, wherein the depth-of-field fine-tuning mechanism is slidably connected to the connecting frame so that the depth-of-field fine-tuning mechanism is moved closer to or farther from the detection station; A linear array color camera connected to the connecting frame to photograph the bill located at the inspection station; The linear array lens is connected to the linear array color camera; A linear array light source, the linear array light source is arranged opposite to the filter switching mechanism, and the linear array light source is arranged between the filter switching mechanism and the detection station; The linear array light source includes two white light fiber optic light sources, two infrared fiber optic light sources provided with polarization devices, two ultraviolet LED light sources and one white light infrared hybrid reflective LED light source; The filter switching mechanism is provided with a plurality of filters, and the plurality of filters are used to cooperate with the white light fiber optic light source, the infrared fiber optic light source, the ultraviolet LED light source, and the white light infrared hybrid reflective LED light source; The detection bracket is provided with an extended detection point, and the extended detection point is used to install a newly added detection device; A silo, the silo is used to place the bills, and the silo is connected to the detection bracket; There are two silos, which are respectively arranged at two opposite ends of the motion guide rail; or there is one silo, which is arranged at either end of the opposite ends of the motion guide rail. The silo is provided with an in-silo station and a size adjustment mechanism, the in-silo station is used to place the bill, and the size adjustment mechanism is connected to the in-silo station to adjust the size of the in-silo station according to the face size of the bill; A bill taking and placing device, wherein the bill taking and placing device is arranged between the silo and the detection station; Wherein, the bill taking and placing device is used to take and place the bill between the silo and the detection station; The bill taking and placing device comprises: A transfer rail, the transfer rail being connected to the detection bracket; An adsorption mechanism, wherein the adsorption mechanism is slidably connected to the transfer guide rail; Wherein, the adsorption mechanism is used to take out the bill in the silo and place it on the detection station; or the adsorption mechanism is used to take out the bill on the detection station and place it in the silo; The transfer rail is divided into an infeed transfer rail and an outfeed transfer rail, and the adsorption mechanism is divided into an infeed adsorption device and an outfeed adsorption device. The infeed transfer rail is arranged correspondingly to the feed bin, and the infeed transfer rail and the feed bin are both arranged at the left end of the detection bracket. The infeed transfer rail is connected to an infeed adsorption device, and the infeed adsorption device cooperates with the infeed transfer rail to transfer the bills in the feed bin to the detection station. The outfeed transfer rail is arranged correspondingly to the outfeed bin, and the outfeed transfer rail and the outfeed bin are both arranged at the right end of the detection bracket. The outfeed transfer rail is connected to an outfeed adsorption device, and the outfeed adsorption device cooperates with the outfeed transfer rail to transfer the bills on the detection station to the outfeed bin. The feed adsorption device includes a suction cup, an air circuit, a spring device and an in-place photoelectric device. The suction cup is used to adsorb the bill. One end of the air circuit is connected to the suction cup, and the other end of the air circuit is connected to the vacuum device. The spring device is used to enable the suction cup to move up and down. The in-place photoelectric device is used to detect the position of the feed adsorption device so that the suction cup can descend to a suitable position, suck up the bill and place the bill on the detection station.

2. The bill quality detection device according to claim 1, characterized in that: The thickness detection device comprises: 3D measuring machine; Wherein, the three-dimensional measuring instrument is arranged above the detection station.

3. The bill quality detection device according to claim 1, characterized in that: The line width detection device comprises: Area array camera; A telecentric lens connected to the area array camera; A coaxial light source is connected to the telecentric lens.

4. The bill quality detection device according to claim 1, characterized in that: The detection device also includes: A coating detection device, the coating detection device is used to detect the brightness difference of the bill; Wherein, the ticket surface detection device is located between the thickness detection device and the coating detection device.

5. The bill quality detection device according to claim 4, characterized in that: The coating detection device comprises: Deep UV camera; A matching lens, the matching lens is connected to the deep ultraviolet camera; A dome light source is arranged opposite to the matching lens, and the dome light source is arranged between the matching lens and the detection station.

6. The bill quality detection device according to any one of claims 1 to 5, characterized in that: Also includes: A position adjustment guide rail, the position adjustment guide rail is connected to the detection bracket, and the position adjustment guide rail is arranged opposite to the motion guide rail; Wherein, the thickness detection device and the line width detection device are respectively slidably connected to the position adjustment guide rail, so that the thickness detection device and the line width detection device can approach or move away from the moving guide rail.

7. The bill quality detection device according to any one of claims 1 to 5, characterized in that: The detection station comprises: A detection platform, the detection platform is slidably connected to the motion guide rail, and the detection platform is used to place the bill; A pressure plate guide rail, the pressure plate guide rail is connected to the detection platform; A pressure plate guide post, one end of which is connected to the pressure plate guide rail; A pressure plate assembly is slidably connected to the pressure plate guide rail, and the pressure plate assembly is connected to the pressure plate guide column, so that the pressure plate assembly approaches the detection platform along the pressure plate guide column and cooperates with the detection platform to clamp the bill.

8. The bill quality detection device according to claim 7, characterized in that: The pressure plate assembly comprises: Platen frame; A first glass plate is disposed in the pressing plate frame.

9. The bill quality detection device according to any one of claims 1 to 5, characterized in that: Also includes: A chassis, the chassis is used to set the measuring bracket; A display control device is disposed on the chassis and is communicatively connected with the detection device.

10. A bill quality evaluation device, characterized in that: include: The bill quality detection device according to any one of claims 1 to 9; A processor is connected in communication with the detection device to obtain detection data of the detection device and process the data to generate a quality evaluation report.

11. A bill quality detection method, characterized in that: The bill quality is detected and evaluated using the bill quality evaluation device as claimed in claim 10, wherein the quality detection method comprises: Place the bill on the inspection station; The detection station translates along the first guide rail so that the bill passes through multiple types of detection devices in sequence; The detection device collects images of the bill to obtain an image feature set; Obtaining feature information corresponding to the printing process of the bill according to the image feature set; Summarizing the characteristic information to generate a quality evaluation report; The obtaining of feature information corresponding to the printing process of the bill according to the image feature set specifically includes: Extracting the image feature set formed on the bill by the offset printing process in the printing process to obtain offset printing feature information; Extracting the image feature set formed on the bill by the gravure printing process in the printing process to obtain gravure printing feature information; Extracting the image feature set formed on the bill by the code printing process in the printing process to obtain code printing feature information; Extracting the image feature set formed on the bill by the silk-screen printing process in the printing process to obtain silk-screen feature information; Extracting the image feature set formed on the bill by the coating process in the printing process to obtain coating feature information; Extracting the image feature set formed on the bill by the cutting process in the printing process to obtain cutting feature information; Extracting a set of image features formed on the bill by the anti-counterfeiting process in the printing process to obtain anti-counterfeiting feature information; The offset printing characteristic information includes: offset printing defect characteristic information, offset printing ink color characteristic information, offset printing feature information, offset printing overprinting feature information, offset printing wiring feature information, color mixing feature information, offset printing line width feature information, anti-copying mark feature information, and colored fluorescent feature information; The gravure printing characteristic information includes: gravure printing defect characteristic information, gravure printing ink color characteristic information, gravure printing overprint characteristic information, gravure printing connection characteristic information, gravure printing line width characteristic information, infrared characteristic information, and thickness measurement characteristic information; The printing code characteristic information includes: number printing defect characteristic information and colorless fluorescence characteristic information; The silk screen feature information includes: silk screen defect feature information, optical gradient magnetic ink feature information; The coating feature information includes: coating defect feature information; The anti-counterfeiting characteristic information includes: watermark characteristic information and security thread characteristic information; The cutting feature information includes: cutting size feature information and squareness feature information.

12. The bill quality detection method according to claim 11, characterized in that: Also includes: The step of turning over the bill and inspecting the other side of the bill.

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