KR20080002204A - Method for detecting the authenticity of paper money by grouping the data of magnetic ink - Google Patents

Abstract

A method for detecting the authenticity of paper money by grouping data of magnetic ink is provided to detect the authenticity of the paper money with damaged or contaminated magnetic information of the magnetic ink, by sensing the paper money using a number of magnetic sensors. According to a method for detecting the authenticity of paper money by using the characteristics of magnetic ink used in the paper money for preventing counterfeiting and forgery, a sensor part comprising a number of magnetic sensors divides recognition section of the paper money by dividing the magnetic sensor into a plurality of groups(S410). Paper money is inputted to the bottom of the sensor part, and the magnetic sensor of the sensor part senses magnetic ink of the paper money(S420). A control part calculates plural dispersion values from information recognized from each group of the magnetic sensor(S430). The control part compares the plural dispersion values with a reference dispersion value for genuine paper money(S440). Authenticity of the paper money is discriminated from the comparison result.

Description

Method for detecting the authenticity of paper money by grouping the data of magnetic ink}

1 is a configuration diagram showing a system to which a method of determining the authenticity of banknotes by grouping magnetic ink information according to an embodiment of the present invention is applied.

2 is a view showing an operating state of determining the authenticity of banknotes by grouping magnetic ink information according to the present invention.

3 is a waveform diagram of splitting and outputting banknotes in the magnetic sensor shown in FIG. 2.

Figure 4 is a flow chart illustrating a method of determining the authenticity of bills using the magnetic sensor according to the present invention.

<Description of the symbols for the main parts of the drawings>

20: sensor unit 22: magnetic sensor

30: magnetic force 40: control unit

45: temporary storage 50: database

60: external display unit G1, G2, G3: segment recognition section

82, 84, 86: Magnetic ink use section

The present invention relates to a method of judging the authenticity of banknotes by grouping magnetic ink information, and more particularly, to arrange a plurality of magnetic sensors sensitive to magnetic ink used for preventing forgery and alteration of banknotes, By dividing and detecting banknotes by dividing them into groups, a method of judging the authenticity of banknotes by grouping magnetic ink information which more effectively verifies the banknotes whose magnetic information is damaged or contaminated by the period of use and other factors or has less magnetic information will be.

Generally, various advanced technologies are applied to securities such as banknotes or checks in the manufacturing process to prevent forgery and alteration, and thus, each banknote has a unique geological characteristic, a background color, a surface characteristic, an ink characteristic, and the like.

Looking at the method of determining the authenticity of a banknote using the characteristics of the conventional banknotes, the method of determining the authenticity by analyzing the shape, geological characteristics or surface characteristics printed on the banknotes and the characteristics of the ink, etc. used in the banknotes It can be largely classified into a method of detecting and determining the authenticity of bills.

First, the method of judging the authenticity of banknotes by precisely analyzing the shape or surface characteristics printed on the banknotes is difficult to identify with the naked eye, but it can be confirmed by magnifying and observing the micro lettering technology and convex letters or patterns. Intaglio printing technology, which can be recognized as a touch, can be recognized, and watermark technology, which shows a hidden picture when light is reflected, is used.

However, the method of judging the authenticity of banknotes through the precise analysis as described above has a problem in that it is applied to a financial teller machine (ATM), which is used by many people because it takes a lot of time to judge the authenticity. Due to the development of precision printing technology such as copying and scanning, it is difficult to judge the authenticity of banknotes because the characteristics can be realized similar to true paper money.

Special inks used in banknotes to prevent forgery and alteration include ultraviolet ink, infrared ink, magnetic ink, and discolorable ink. Conventional methods for determining the authenticity of banknotes using the unique properties of these special inks are as follows. In the natural state, most of them appear as a single color, but when a ray having a special wavelength such as ultraviolet rays or infrared rays is shot, the color expressed by the energy corresponding to the wavelength differs from the color in the natural state, and iron oxide, etc. It contains a material having magnetic properties, and measures magnetic reluctance (MR) that varies depending on the type and amount of the magnetic material, and a method of detecting color change by applying minute heat to a bill.

The method of judging the authenticity of a banknote by using the unique properties of the special ink used in the conventional banknotes as described above is easier than the above-described precision analysis method, and the judgment speed is easier and the judgment speed is faster. It can be used as a financial automation factor as well as forgery and forgery identification.

However, the method of judging the authenticity of banknotes using the properties of special ink is mostly one or more ink properties, such as infrared and magnetic properties, ultraviolet and magnetic properties, and a plurality of ink properties such as ultraviolet and infrared and visible light. To determine the authenticity of a bill by determining the authenticity of the banknote, the conventional authenticity determination method using the magnetic properties is based on one measurement value recognized in the whole banknote through a single magnetic sensor when recognizing the magnetic ink used in the banknote Since the authenticity is determined, there is a problem in determining whether the magnetic information of the banknote is damaged or contaminated due to the period of use and other factors, or the forgery or forgery of the banknote having less magnetic information.

The present invention is to solve the above problems. That is, by detecting the magnetic ink used in the banknote for the purpose of preventing forgery and alteration, the banknote is divided into a plurality of magnetic sensors to effectively detect whether the magnetic information of the magnetic ink is partially damaged or contaminated. Its purpose is to.

In addition, by measuring the magnetic strength of the magnetic ink, such as the magnetic resistance of the magnetic ink according to each position in the divided recognition section of the banknote, and comparing it with the information on the genuine banknotes, Another purpose is to effectively judge forgery and alteration.

In order to achieve the above object, the method of determining the authenticity of banknotes by grouping the magnetic ink information according to the present invention comprises determining the authenticity of the banknotes using the characteristics of the magnetic ink used in the banknotes to prevent forgery and forgery. In the method, a first step of dividing the magnetic sensor 22 into a plurality of groups in the sensor unit 20 configured by arranging a plurality of magnetic sensors 22 in a plurality of groups to divide and set the recognition period of the bill; In the second step of inputting a bill to the lower portion of the sensor unit 20, the magnetic sensor 22 of the sensor unit 20 detects the magnetic ink of the bill, and in the divided recognition area divided into a plurality of groups, A third step in which the control unit 40 calculates a plurality of dispersion values from information recognized by each group of the magnetic sensors 22, and the control unit 40 stores the calculated plurality of dispersion values for the original banknote. Characterized by comprising a fifth step for determining a fourth step, a bill authenticity from the comparison result of said plurality of dispersion values with the reference variance value for comparing the variance values to individual.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a system to which the method of determining the authenticity of banknotes by grouping magnetic ink information according to an embodiment of the present invention is applied.

Referring to FIG. 1, a system for determining the authenticity of banknotes by grouping magnetic ink information includes a sensor unit 20 in which a plurality of magnetic sensors 22 that recognize magnetic ink used in a banknote are arranged in a line, and The controller 40 is configured to calculate the magnetic ink information recognized by the sensor unit 20 as a representative value of numerical values distributed in a predetermined region, and a temporary storage unit which temporarily stores the dispersion value calculated by the controller 40. (45), a database 50 in which the reference variance value of the true banknote is stored, a variance value temporarily stored in the temporary storage unit 45 in the control unit 40, and a reference variance value of the database 50. The external display unit 60 is configured to determine whether or not the authenticity of the bill through comparison with the display so that the authenticity result can be recognized from the outside.

The magnetic ink used for the banknote includes a magnetic material, and the magnetic sensor 22 of the sensor unit 20 may recognize a magnetic force emitted from the magnetic ink. In the case of counterfeit bills in which magnetic ink is not used, the magnetic sensor 22 does not react because magnetic material is not included.

2 is a view showing an operating state of determining the authenticity of banknotes by grouping magnetic ink information according to the present invention.

As shown in FIG. 2, the sensor unit 20 is composed of a plurality of magnetic sensors 22, and the magnetic sensor 22 is perpendicular to the movement direction T of the banknote with respect to the sensor unit 20. It is arranged at regular intervals along the longitudinal direction L of the banknote in the direction.

The sensor unit 20 divides a plurality of the magnetic sensors 22 into a plurality of groups to divide and recognize bills, and each group is configured to individually recognize the divided regions G1, G2, and G3 on the bills. As a result, the information on the positions 82, 84, and 86 where the magnetic ink is used and the strength of the magnetic force 30 of the magnetic ink, that is, the magnetoresistance value, are determined for each region. When the plurality of magnetic sensors 22 are divided into a plurality of groups, the number of magnetic sensors 22 corresponding to each group may be adjusted according to an initial setting.

In order to prevent forgery and alteration, the magnetic ink used in the banknote is used only for a character or a picture at a specific position, and the banknote is manufactured so that the magnetic size of the magnetic ink also varies depending on the specific position.

The sensor unit 20 maintains a constant vertical distance (h) with the bill. Since the strength of the magnetic force is a function of the distance, the value varies according to the change of the vertical distance (h), so the authenticity of the bill is determined. Maintain a constant vertical distance.

The database 50 stores a reference variance value for the true banknote. The reference variance value includes a position spaced apart from the longitudinal direction L and the width direction W of the banknote based on a reference point of the banknote, for example, one edge of the banknote, and a magnetic strength value according to the position.

The magnetic intensity of the magnetic ink may represent the strength of the magnetic force recognized by the magnetic sensor 22 as the magnitude of the magnetoresistance, current or voltage.

In this way, a plurality of magnetic sensors 22 can be grouped, the division region of the corresponding bill in each group can be detected, and the variance values corresponding to each group can be compared probabilistic to determine whether the forgery or forgery of the banknote is more accurate. Can be.

3 is a waveform diagram of splitting and outputting banknotes in the magnetic sensor shown in FIG. 2.

Referring to FIG. 3, the variance values recognized in one group of the magnetic sensors 22 can be largely divided through three types of waveforms.

In each graph, the x-axis indicates the moving distance of the banknote moving from the reference point in the width direction (W) of the banknote as the reference point, and the y-axis indicates the numerical value obtained by converting the information recognized in the magnetic ink into the variance value. to be.

In addition, each graph of FIG. 3 is analyzed using the F distribution analysis method in which variance analysis is performed through size comparison between sums of squares in a reliability technique known in the art.

3A is a waveform shown when a banknote is forged and forged using an ink containing magnetism. As shown in FIG. 2, the magnetic ink is generally used in the recognition area as in the magnetic ink use section 82 used in the divided recognition area G1, and the magnetic value of the magnetic ink is due to irregular values of dispersion values. The intensity of the shows an uneven appearance.

This result appears mainly in the case of forgery and alteration of banknotes through a copier using ink containing magnetic.

The graph of FIG. 3 (b) is a result when a bill is forged without using a magnetic ink, and is a graph mainly displayed when a printed matter scanned by a computer is recognized.

That is, in the case of printed matter, since a magnetic component material is not included in the ink used in the printing process, a linear graph is shown.

If a magnetic component is not included in the ink even in the process of producing a counterfeit / modulated bill using a copying machine, the same result as in the graph (b) is measured.

(C) graph of FIG. 3 is a graph which appears in a true banknote.

In the case of true banknotes, the positions of letters or pictures in which magnetic ink is used are shown in a specific position rather than the entire bill, and are shown as shown in (c) graph of FIG. 3, unlike (a) graph, in a specific range. It has a constant variance.

Through the above graph, it is possible to determine the authenticity of the banknote by simultaneously obtaining the dispersion value by the strength of the magnetic force emitted from the specific position and magnetic ink used in the specific area.

Figure 4 is a flow chart illustrating a method of determining the authenticity of banknotes using the magnetic sensor according to the present invention.

Hereinafter, a method of determining authenticity of banknotes using a magnetic sensor according to an embodiment of the present invention will be described with reference to FIG. 4.

First, in order to determine the authenticity of bills, a plurality of magnetic sensors 22 arranged in a row are divided into a plurality of sensor groups to divide and set a recognition section of the bill.

Subsequently, by placing the banknote and moving the banknote while maintaining a constant vertical distance at the bottom of the magnetic sensor 22, the magnetic ink of the banknote is recognized according to the moving distance that proceeds from one corner of the banknote as a reference point (S420).

Since the magnetic sensor 22 is divided into a plurality of groups to divide and recognize bills in each group, information is individually recognized in each group.

The plurality of pieces of information recognized by the magnetic sensor 22 are input from the control unit 40 which is a central processing unit, and calculated as a dispersion value including the use position information of the magnetic ink and the intensity information of the magnetoresistance, and the control unit 40. The plurality of variance values calculated in the temporary storage unit 45 is stored (S430).

In this way, the plurality of variance values temporarily stored in the temporary storage unit 45 are individually compared with the corresponding reference variance values of the database 50 in which the information on the true banknote is stored (S440).

Specifically, in the comparison process, the dispersion value is a numerical value converted by including the positional information and the intensity information of the magnetic ink at the same time. The controller 40 searches for a predetermined pattern in a plurality of variance values, and retrieves a reference variance value corresponding to the pattern of the variance value from the information in the database 50.

When the reference variance value corresponding to the variance value is derived, the respective numerical values are compared and judged to determine whether the variance value is recognized. For example, if the magnitude of the variance value is larger than the magnitude of the reference variance value, the variance value is recognized as a true banknote (S450, S455).

As described above, it is determined whether the number of divided groups in which the variance value is recognized corresponds to a constant ratio based on the number of all divided groups (S460), and when the number of divided groups in which the variance value is recognized is equal to or greater than a predetermined ratio, the controller 40. ) Determines that the recognition result of the banknote is the original (S475).

On the contrary, if it does not correspond to a certain ratio, it determines that the banknote is a forgery or altered banknote. (S475)

When the authenticity of the banknote is determined as described above, the authenticity of the banknote is displayed through the external display unit 60 configured as a display or an alarm device so as to recognize the judgment result from the outside.

As described above, in determining the authenticity of the bill using a magnetic sensor sensitive to the magnetic ink used for the bill, a plurality of magnetic sensors are grouped to divide and set the recognition area of the bill, and each recognition area is in one group. By detecting and measuring the location of use of the magnetic ink in the group and the magnetic strength of the magnetic ink has an effect that can determine the authenticity of the bill more effective and accurate.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, changes, and modifications are possible in the technical field of the present invention without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the method of judging the authenticity of banknotes by grouping magnetic ink information includes subdividing and detecting the banknotes using magnetic ink, thereby determining whether the magnetic information of the magnetic ink is partially damaged or contaminated. It can work.

In addition, since a plurality of magnetic information, that is, location information of magnetic ink and magnetic size information are recognized by segmentation measurement of banknotes, even if the magnetic ink is used less and the banknote type is difficult to recognize magnetic information, There is also an effect that can effectively determine whether the modulation.

Claims (5)

In the method of judging the authenticity of a bill by using the characteristics of the magnetic ink used in the bill to prevent forgery and alteration, A first step of dividing and setting the recognition section of the banknote by dividing the magnetic sensor 22 into a plurality of groups in the sensor unit 20 having a plurality of magnetic sensors 22 arranged in a line; A second step of inputting a bill under the sensor unit 20 so that the magnetic sensor 22 of the sensor unit 20 detects a magnetic ink of the bill; A third step of calculating, by the controller 40, a plurality of dispersion values from the information recognized by each group of the magnetic sensors 22 in the divided recognition region divided into a plurality of groups; The controller 40 further comprises: a fourth step of comparing the calculated plurality of variance values with reference variance values for true banknotes individually; A fifth step of determining the authenticity of the banknote from the comparison result between the plurality of dispersion values and the reference dispersion value; Method for determining the authenticity of the bill by grouping the magnetic ink information, characterized in that consisting of. The method of claim 1, In the third step, The dispersion value is a method for determining the authenticity of banknotes by grouping the magnetic ink information, characterized in that the information on the location of use of the magnetic ink and the strength information of the magnetic resistance. The method of claim 1, In the fourth step, The reference dispersion value of the true banknote is found in the database 50 by combining the use position information of the magnetic ink included in the dispersion value, and the magnitude of the magnetoresistance is compared based on the intensity information of the magnetoresistance. A method of determining the authenticity of banknotes by grouping ink information. The method of claim 1, In the fifth step When the number of groups whose variance value is greater than the reference variance value of the true banknote is equal to or more than a certain ratio, the controller 40 determines the authenticity of the banknote by grouping the magnetic ink information according to the present invention. The method of claim 1, Magnetic ink, characterized in that the divided region to be recognized in one group consisting of the magnetic sensor 22 is divided into upper, middle and lower ends, and the authenticity of the bill by comparing the dispersion value in each classification region A method of determining the authenticity of banknotes by grouping information.

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