WO2006045247A1

WO2006045247A1 - Validator for banknote

Info

Publication number: WO2006045247A1
Application number: PCT/CN2005/001769
Authority: WO
Inventors: Zizhi Huang; Yachun Liang
Original assignee: Zizhi Huang; Yachun Liang
Priority date: 2004-10-28
Filing date: 2005-10-26
Publication date: 2006-05-04
Also published as: CN1725251A; CN100517395C

Abstract

A validator for banknote which includes an optical system, an electric system, an application terminal, and a power supply device can make the image information of the detected banknote expose to the signal transforms with various energy twice. The optical signal is transformed into the electric signal by the image sensor in the image receiver, and the electric signal is transformed into the optical signal again by the electric display. The first grade is that the optical amplify is achieved by the optical system, the second grade is one electric amplify which is achieved by the video processor and other electric amplify which is achieved by the electric display in the image receiver, respectively. The micrograph of the sampling point of the detected banknote can appear simultaneously on the two displays of the present invention, and it can be recorded by the monitoring recorder at the same time. Thus the validator for banknote can detect the validity of the banknote.

Description

Jianzhen Machine Technology

The invention relates to a device for authenticating the authenticity of a banknote, which is referred to as a authentic machine, and is suitable for authenticating the printed matter of a banknote, a valuable securities, a ticket, a document, a trademark and the like. Background technique

Counterfeit money has become a major public nuisance in the world. In order to identify the counterfeit currency market, various types of money detectors have also appeared. However, most of the existing identification technologies and products on the market focus on the anti-counterfeiting features and markings of genuine coins, and enter into endless vicious competition with counterfeit currency. As a result, new and effective counterfeit products are aristocratic. In addition to the "one look, two touches and three listenings", the general public lacks a truly effective and applicable money detector. It is difficult to fight in the face of modern counterfeit money under high-tech conditions. This is the reason why counterfeit criminals have been defensive, and the counterfeit crimes have been blazed and blamed.

In GB16999-1997 "National Counterfeit Banknote Discriminator" national standard, eight of the nine authentication methods are specified for anti-counterfeiting marks or features, and two or more modes are required at the same time; in addition, 1/5000 or less is allowed. The rate of missed. This shows that even if the RMB counterfeit banknote discriminator conforms to the GB16999 national standard, the identification result does not have the authority to terminate the ruling. The standard was established in 1997 and is only applicable to people; RMB. Since 1997, the world has undergone tremendous progress, and counterfeit currency manufacturing technology is advancing with the times, and our 97-year standard should be upgraded.

Both genuine and counterfeit coins are color prints. The real currency is the legal currency issued by the government and is a special color printing product. For the purpose of anti-counterfeiting, the government must 'secretly develop a special currency printing technology standard system and a strict security monitoring system that are completely different from civilian color printing and always different. The technology, technology, raw materials and equipment related to this are impossible to shed the folk. Obviously, this is true in any country. .

According to the inventor's research on genuine coin printing, the microscopic image of the genuine coin printing has the characteristics of "line structure". Counterfeit currency is a common color print, no matter how it is made or how beautiful it is, it is the product of the international standard system of modern color printing technology. This international standard system covers: offset, gravure, stencil, flexo and electronic color separation, laser phototypesetting, color copying, laser printing, digital color printing, digital photography and more. The image is composed of pixels (i.e., dots), so that the microscopic image of the print has the above-mentioned "mesh structure" feature. Criminals are subject to concealment, timeliness, and practicality. They can only use such ordinary color printing techniques and equipment to commit crimes.

The basic theory of modern color printing technology is printing chromatics. It studies how to make physical carriers such as paper

1

Confirmation Batch copy (ie, print) color images: In theory, only three colors of cyan, magenta, and yellow can be mixed to express various colors in nature. In practice (ie, printing technology), black is added to obtain black. , so called the four primary colors, at the same time, the image is decomposed into dots (ie, then separated pixels) to achieve spatial color mixing. That is, "net dot group map, four primary color overprinting" is the most basic principle of modern color printing technology. Based on this principle, industrial conventional color printing equipment such as offset printing, gravure printing and flexo printing have been produced, and office desktop printing systems such as color copying, computer (laser or inkjet) printing, etc. have also been produced. Industrial digital color printing equipment such as plate making and digital color printing. All of these counterfeit coins printed by civilian color printing equipment are essentially the same as ordinary color prints, and all have the common feature of "net dot group image, four base color overprinting", that is, the basic features of the dot structure. It can be seen that the legal currency of any country cannot be printed on civilian color printing equipment. That is to say, the true currency of any country does not have the characteristics of the dot structure; in addition to the coinage, it also has the characteristics of line structure. Banknotes with dot structure features do not exist. The difference between the microscopic structural features of the true and false banknotes is extremely large, and there is a ambiguity between the two. The vast majority of the people are easily recognizable regardless of the cultural background. In summary, the standard system of different color printing technologies is the essential difference between true and counterfeit currency. The major differences in the structural characteristics of micrographs, like the genetics of biological individuals, are innate and never evasive. This is the fatal point of counterfeit currency, and it is also the basic basis for microscopic banknote technology. Therefore, the identification result of the authentic machine has indisputable accuracy and authority.

The inventors have previously patented CN03253229. 6 Chinese patent entitled "Microscopic - Ref.", which is a pure optical microscopy device with dual image display. The disadvantages are as follows: 1. The two optical imaging screens are very close, which is more suitable for use in the bank counter. If the customer is used outside the counter, it is difficult for the bank personnel to know that the banknotes in the hands of the customers are true and false, and even more impossible. Monitoring synchronous recording; 2, inconvenient for law enforcement personnel to use; 3 optical imaging screen image is dim; 4, the light source and optical components technical parameters are more demanding.

Previously, there were three related Chinese utility model patents published, the patent numbers were CN94212047. 7; CN94215271..9; CN95245454. 8, all of the three patent specifications did not touch the color printing technical standards and "line" The structure "", "spot structure" and the like, but with the scale ruler, the grid ruler and the typical feature recognition map of the true and false coins, respectively observe the sharpness of the lines in each square on the true and false coins, the lines The number and the diameter of the wire or the diameter are used as the identification criteria. This effect is no different from a magnifying glass, so it is not advanced and not practical. Disclosure of invention

The object of the present invention is to provide a authenticity machine which is intuitive and accurate in identification, open in identification process, non-destructive and fast, structurally stable and reliable, low in cost, and can identify any banknotes and other special printed products in any country.

The object of the present invention is achieved based on the principle that, as described above, according to the inventor's research on genuine coin printing, it is found that the microscopic image of the genuine coin print has the "line structure" feature, while the counterfeit currency is " The dot structure", due to the emergence and development of image sensor modules in recent years, provides technical support for microscopic image observation and transmission.

The invention uses the following specific technical solutions:

Including optical systems, electronic systems, application terminals and power supply units:

Optical system: for performing non-destructive optical sampling and optical amplification of banknotes, including image sensors in the authenticity table, main support, light-emitting diode, mirror, microscope objective and image receiving component; The top has a transparent sampling window, 'Jianzhen table and the main bracket are threaded together', and the built-in light source composed of the light-emitting diode and the mirror is installed in the space formed by the upper part of the authentic table and the main bracket, and the microscope objective corresponds to the sampling window. The position is mounted on the cross piece in the middle of the main bracket, and the image sensor is mounted on the main support plate corresponding to the position of the microscope objective;

The electronic system is configured to convert the microscopically amplified real image optical signal obtained in the image receiving component into an image electrical signal, and amplify the output; comprising: a circuit board, an output interface circuit, a circuit part in the image receiving component; and an image receiving component The circuit portion is connected to the circuit board; the output interface circuit includes a triode

Two parallel buffer amplifier circuits consisting of TR1, TR2 and RC components, whose input terminals are connected to the circuit part of the image receiving component; ' '

Application terminal: used to display or record the microscopic image of the banknote to be tested. The room includes two electronic displays, and the input terminal is connected to the output interface circuit.

The application terminal further includes a monitoring video recorder for displaying a microscopic image of the banknote to be inspected, and correspondingly, a triode TR3 and a third buffer amplifying circuit of the RC component are also connected in parallel in the output interface circuit.

A limiting device for limiting the distance between the upper and lower sides of the authenticating platform is mounted on the main bracket.

The microscope objective lens is a lens group comprising at least one positive lens and one negative lens, which is equivalent to a positive lens. '

The authenticity table is screwed to the upper part of the main support and is formed with an adjustable fully enclosed space. The image receiving component includes a CCD or CMOS color image sensor and a video processor. The image receiving component is a CCD or CMOS color image sensor module, including the above image sensor and video processor chip.

― The power supply unit includes a rechargeable battery, an AC adapter, and a power switch that supplies power to the light emitting diode, the image receiving assembly, the output interface circuit, and the local electronic display.

The application terminal includes a local electronic display, an external electronic display, and an external surveillance video recorder. The electronic display can be mainly composed of a TTF liquid crystal display or a CRT electronic vacuum picture tube.

Because of adopting the above structure, the invention consists of an optical system, an electronic system, an application terminal and a power supply device, and the device integrates the optical machine to identify the authenticity of the banknote, and the image information of the to-be-printed product can be subjected to signals of different energy forms. Transformation process: The image sensor in the image receiving component converts the optical signal into an electrical signal, and the electronic display reconverts the electrical signal into an optical signal, and continuously passes through a signal amplification process of two different energy forms: the first stage is completed by the optical system. Optical amplification, the second stage is two electronic amplifications respectively performed by the video processor and the electronic display in the image receiving component, and the total magnification of the sampling point image = optical magnification X first electronic magnification X second electronic gain. When the printed product is placed flat on the Jianzhen station and the sampling point is covered by the sampling window with the light penetrating, the microscopic image of the sampled banknote can be simultaneously displayed on the south display, and the video recorder is also at the same time. This image, according to the research of the inventor, found that the microscopic image of the genuine coin print has the "line structure" feature, while the counterfeit currency has the "mesh structure" feature, which can be visually and accurately, democratically disclosed, and non-destructively and quickly identified. true and false. The device of the invention has the advantages of simple structure, stable and reliable, and low power consumption. The invention can also identify banknotes and other special prints of any other country. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a block diagram showing the principle of the embodiment of the present invention;

2 is a schematic view of an optical system and an electronic system of an embodiment of the present invention;

FIG. 3 is a circuit diagram of an embodiment of the present invention;

Embodiments, as shown in FIG. 1: The present invention includes: an optical system, an electronic system, an application terminal, and a power supply device:

Optical system: As shown in Fig. 2, the image sensor in the calibration table 2, the main support '3, the light-emitting diode 5, the mirror 4, the microscope objective 6 and the image receiving component 7: The Jianzhentai 2 is shaped like a bottle cap, and the top is provided with a transparent glass plate as a sample window; the upper part of the main support 3 has a cylindrical shape, the lower section has a square tube shape, and the upper and lower sections have a transverse piece 15 as a 'lanceure frame, The micro objective lens 6 is fixed at the center thereof; the authentic table 2 is screwed to the upper portion of the main bracket 3 to jointly define a fully sealed space; the authentic table 2 can be manually rotated to enable the sampling window to move up and down along the optical axis direction thereof. The main bracket 3 has a limiting device 14 for limiting the moving distance of the authenticating table 2 to prevent the user from operating by mistake. The function of Jianzhentai 2 is: [1] limited adjustment optical system object distance; [2] stable object distance during use; [3] sealed optical system, dustproof and moisture proof.

The microscope objective 6 is a lens group composed of a 'positive positive and negative lens, which is equivalent to a positive lens for optical amplification. In this embodiment, the focal length of the microscope objective lens is 8.66 mm; between the Jianzhen table 2 and the microscope objective lens 6, there is a mirror 4, which is shaped like a flashlight condenser, the center opening is opposite to the sampling window and the microscope objective 6, reflective The mirror 4 also serves as a light source holder on which a low power white light emitting diode 5 is mounted, and the image receiving unit 7 is disposed on the bottom plate of the lower stage of the main holder 3.

The image sensor in the image receiving unit 7 and the above microscope objective 6, the light emitting diode 5, the mirror 4 and the authentic table 2 constitute an optical system. The focusing mode is: The image distance is constant, and the object distance is limited. The lower section of the main support 3, the cross-section of the microscope objective 6 and its holder 3, and a portion of the circuit board 13 constitute an optical dark box to prevent stray light interference.

Electronic system: As shown in Fig. 1, 'Fig. 2, Fig. 3', the electronic system includes a circuit portion of the image receiving unit 7, a circuit board 15, and an output interface circuit 8. *

The image receiving component 7 is composed of an image sensor and a video processor; the image sensor selects a CCD or CMOS color image sensor according to the model of the authentic machine, and the main function of the image is to convert the image light signal concentrated on the optical surface into a representation. The electrical signal of the image; the video processor mainly includes: [1] image sensor driving circuit; [2] automatic white balance circuit, which automatically adjusts the image signal color difference parameter according to the color temperature of the light source LED 5 to prevent image color shift, To make the displayed image tone solid; [3] video signal amplification, processing circuit, which performs (first) electronic amplification on the image electrical signal, and processes it into a standard format for electronic display 9, 10 and video recorder 12 video signals used. Optional color video camera board group # for CCD or CMOS color image sensor modules. The color image sensor module includes a CCD or CMOS color image sensor and a fully functional video processor chip. In this embodiment, a domestic single-chip color CCD camera assembly component is selected, and the model number is DF-228. The component is a CCD color image sensor module made up of a 1/4-inch color CCD image sensor and a video processor chip manufactured by SHARP, Japan. The main technical parameters are shown in Fig. 3. The output interface circuit 8 includes three parallel buffer amplifiers composed of three transistors TR1, TR2, TR3 and a RC element and two video output jacks + CK1, CK2. The output interface circuit 8 selects a crystal triode discrete component circuit or an equivalent emitter helium integrated circuit according to different models of the authentic machine. A part of the components of the image receiving component 7 and the output interface circuit 8 are mounted on the circuit board. The output interface circuit 8 is configured to simultaneously distribute the video signal from the image receiving component 7 to the application terminals through three-way buffer amplification.

Application terminal: Contains two electronic displays 9, 10 and a surveillance video recorder 12. Configured on the local machine of the authentic machine is a small electronic display with a small screen. 9. According to the model of the authentic machine, select 'TFT LCD true color display or CRT vacuum color display. In this embodiment, a 2. 5 inch 'color liquid crystal monitor is used; the other display 10 is externally connected, and is selected or provided by the user. This embodiment uses a domestic 4-inch liquid crystal monitor, and the model number is LT-408PN. The electronic display is used to perform (second) electronic amplification of the video 'signal according to the screen size, and to re-convert the video signal (ie, the image electrical signal) into an optical signal of the color image. The surveillance video recorder 12 is external; it is provided by the user and is usually only required by the bank. The video recorder 12 is used to synchronously record the microscopic image of the banknote being inspected under the monitoring state, and is used to check the banknotes in the hands of the banknotes.

Power supply unit: The power supply unit 11 includes a rechargeable battery, an AC adapter ('that is, a DC stabilized power supply, not shown), and a power switch 13. The power supply device 11·· supplies power to the light-emitting diode 5, the image receiving unit 7, the output interface circuit 8, and the local electronic display 9, and the external electronic display 10 and the monitoring video recorder 12 are additionally powered. '

The authentic machine is in the standby state after the power is turned on, and the white light is emitted from the sampling window on the authentic table 2, and the electronic display 9 has no image display. When the money detector puts the banknote to be inspected on the calibration table 2 and covers the selected sampling point on the sampling window, the sampled point reflects the light through the sampling window and passes through the counter ^{: the} center hole of the light mirror 4 enters the microscope The objective lens 6, refracted by the microscope objective 6, converges on the optical surface of the image sensing module in the receiving assembly 7 to form a magnified real image. This is a micrograph of the banknote sample image after optical magnification. Manually fine-tuning the authentic table 2 enables the microscopic image to be sharpest. The image sensor module converts the microscopic image optical signal obtained on the optical surface into an image electrical signal, which is electronically amplified and processed into a video signal conforming to a standard system. The output interface circuit then distributes the video signal to the local display 9, the external electronic display 10, and the surveillance video recorder 12. The display 9, 10 again electronically amplifies the video signal according to its screen size and converts it into an optical signal while simultaneously displaying a color microscopic image of the banknote being tested. Bankers, customers, and attendees can simultaneously see the banknote verification process and results, and use the above-mentioned banknote graphic microscopic image structural features as a standard to fairly distinguish their true and false; bank surveillance video recorder 12 simultaneously records this microscopic image. The entire banknote process is only a few hundredths of a second. . From the electronic display 9, 10 can see the real coin microscopic image structure has "line pattern, engraving gravure printing; a variety of spot color oil, ink clear and bright such as dye, gravure ink such as jade relief; color wiring precision Natural; fine lines are smooth, micro-text is clear "characteristics," short for "line pattern" features, the core of which is "line pattern, engraving gravure", its fine 'Hua is "hand-carved, gravure printing"; The microscopic image has "net dot group picture; CMYK (cyan, magenta, yellow, black) four primary color overprinting, ink color is dark as paint, color wiring is often broken or misaligned, colored thin lines are intermittently extended in dots, color blocks It consists of color points; the fine pattern is characterized by the accumulation or loss of dots, and the micro-text cannot be formed. The feature is "net dot structure", and its core is "net dot group image, four-primary color overprint". The above difference is due to the fact that the color printing technology standard system used for genuine and counterfeit currency is completely different and always different. This is the essential difference between true and false 'coins.' The unique structural features of the true and false coins, just like the DNA of a biological individual, are innate and unavoidable. This is the principle of microscopic authentication technology. '

The sample points on the banknote can be arbitrarily selected. The microscopic images at different points are different. However, the structure of the line, the Braille, the main denomination, the color pattern, the color change, and the microscopic image structure of the fine group flower and the microtext are particularly obvious. When the banknote is flatly attached to the sampling window and slowly rubbed back, the electronic display synchronously displays the microscopic image of each point on the "sampling line" (the recorder is also recorded simultaneously), which is very intuitive and convenient. The authentic mirror can be placed in the bank counter by the silver fi ¹ personnel, or can be placed outside the counter by the customer to operate, the effect is the same, the surveillance video can be checked back to the banknotes in the hands of the banknotes.

'The invention is applicable to any banknote in any country. 'Between different types of counterfeit money made by different fakes, between positive and pirated color albums, between true, 'counterfeit commodity boxes, etc., the microscopic images of the images are at the dot distance, the network line angle, Differences in dot shape, ink hue, etc.; for other monochromatic structures (such as seals, fingerprints, handwriting, documents, tickets, etc.) or multiple spot colors (such as trademarks, securities, paintings, etc.) , genuine and replica graphic micro images have differences in line thickness, edge, corner, intersection, curvature, slope and so on. It can also be identified by correlation comparison. The application of the Jianzheng machine in the customs inspection of the cash, passport or court evidence of the transit passengers is the same as that applied in other aspects. Users do not need training, do not need to rely on the banknote security feature map; look at the manual can be done, very simple. . ' '

Industrial applicability

The invention comprises an optical system, an electronic system, an application terminal and a power supply device, has a simple structure, is compact, is convenient to use, can be industrially mass-produced, and has good industrial applicability. '

Claims

Rights request

1. A authentic machine, comprising: an optical system, an electronic system, an application terminal, and a power supply device:

Optical system: for non-destructive optical sampling and optical amplification of banknotes to be tested, including image sensors in the authenticity table, main support, light-emitting diodes, mirrors, microscope objectives and image receiving components; The sampling window, the authentic table and the main bracket are threaded, and the built-in light source composed of the light-emitting diode and the mirror is installed in the space formed by the upper part of the authentic table and the main support, and the position of the microscope objective corresponding to the sampling window is installed in the middle of the main support. On the diaphragm, the image sensor is mounted on the main support plate corresponding to the position of the microscope objective;

The electronic system is configured to convert the microscopically amplified real image optical signal obtained in the image receiving component into an image electrical signal, and amplify the output; comprising: a circuit board, an output interface circuit, a circuit part in the image receiving component; and a circuit in the image receiving component Part of the circuit board is connected to the circuit board; the output interface circuit comprises two parallel buffer amplifier circuits consisting of the pole tubes TR1, TR2 and the RC components, the input terminals of which are connected to the circuit portion of the image receiving component;

Application terminal: used to display or record the microscopic image of the banknote to be tested. The room includes two electronic displays, and the input terminal is connected to the output interface circuit. ' '

2. The authenticator according to claim 1, wherein: the application terminal further comprises a surveillance video recorder for displaying and recording a microscopic image of the banknote to be inspected, and correspondingly, a triode TR3 is further connected in parallel in the output interface circuit. The third capacitive amplifier circuit of the RC component.

3. The authenticator according to claim 1 or 2, wherein: the image information of the banknote to be inspected undergoes a number conversion process of two different energy forms: the image sensor in the image receiving component converts the optical signal into an electrical signal, The electrical signal is then reconverted into an optical signal by an electronic display.

4. The authenticator according to claim 1 or 2, wherein: the image information of the banknote to be inspected is subjected to a signal amplification process of two successive different energy forms: the first stage is optical amplification by an optical system, The second level is two electronic amplifications performed by the video processor and the electronic display in the image receiving component, respectively. .

The authenticator according to claim 1 or 2, wherein: the main bracket is provided with a limiting device for limiting the distance between the upper and lower movements of the authenticating platform.

6. The authenticator according to claim 1, wherein: said microscope objective is a lens group comprising at least one of a positive lens and a negative lens, which is equivalent to a positive lens.

The authenticator according to claim 1, wherein: the authenticity table is screwed to an upper portion of the main bracket and an adjustable fully enclosed space formed between the main bracket and the main bracket.

8. The authenticator of claim 1 wherein said image receiving component comprises a CCD or CMOS color image sensor and a video processor.

9. The authenticator according to claim 1 or 8, wherein: the image receiving component is a CCD or CMOS color image sensor module, and comprises the image sensor and the video processor chip.

10. The authenticator according to claim 1, wherein: said power supply device comprises a rechargeable battery, an AC adapter, and a light source; a pole tube, an image receiving component, an output interface circuit, and a local electronic display. Power switch. .

11. The authenticating machine according to claim 1, wherein: the application terminal comprises a local electronic display mainly composed of a TTF liquid crystal display or a CRT electric vacuum picture tube, an external electronic display, and an external monitoring video recorder. . .