KR102490655B1 - Bill sorter and controlling method thereof - Google Patents

Abstract

The present invention relates to a paper money sorting machine, comprising: a lighting unit for generating light to be projected onto a surface of a bill being transferred into the paper money sorting machine; a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively; a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and a control unit that controls the lighting unit and discriminates the tape attached to the banknote by processing the sensing information detected through the CIS sensor unit.

Description

Bill sorting machine and its control method {BILL SORTER AND CONTROLLING METHOD THEREOF}

The present invention relates to a paper money sizer and a control method thereof, and more particularly, to a bill that can accurately discriminate bills with a tape attached thereto using optical characteristics of light rather than a conventional roller displacement detection method or an ultrasonic method. It is about the machine and its control method.

Usually, a bill sorting machine not only counts bills, but also discriminates whether the accepted bills are legitimate, suitable for circulation, or discarded. For example, it discriminates whether the bill is normal (that is, classified as new bill, circulation bill, damaged bill, etc.) or whether it is a counterfeit bill.

For reference, the banknote straightener described in one embodiment according to the present invention recognizes the type of banknote (eg, 1,000 won, 5,000 won, 10,000 won, dollars, yuan, euros, yen, etc.), counterfeit / altered banknote discrimination, as well as banknote counting B. It is used as a concept that includes all kinds of banknote processing devices equipped with banknote serial number recognizing functions.

However, note that in this embodiment, the banknote sorter is not limited to banknotes, but can also process paper sheets such as banknotes, checks, bills, securities, certificates, gift certificates, coupons, tickets, trademarks, and identification cards. .

The banknote sorting machine is used in financial institutions such as banks, terminal companies, exchange offices, credit unions, and post offices, cash transport companies, gas stations, entertainment establishments, restaurants, night establishments such as hotels, department stores, general offices, supermarkets, duty free shops, chain stores, and convenience stores. It is mainly used in businesses or establishments that handle securities, checks, and cash, such as

These banknote sorters are not limited to any one region or country, but are exported, installed, and operated in various regions or countries around the world. banknotes in a state of high humidity, banknotes contaminated with certain contaminants such as soil in rural areas, some deformed banknotes appearing in areas where there is a tendency to fold banknotes in a certain direction and use them), as well as banknotes in various states (Example: New banknotes, circulation banknotes, old banknotes, crumpled banknotes, holed banknotes, torn banknotes, scribbled banknotes, counterfeit banknotes, altered banknotes, wet banknotes, dirty banknotes, discolored banknotes, banknotes with tape, burnt banknotes, in everyday life Various types of damaged bills generated during use, etc.) must be disposed of.

Here, among the various banknotes as described above, methods for distinguishing tape-attached banknotes include roller displacement detection method, ultrasonic transmission method, capacitance method, ultrasonic reflection method, thermal radiation detection method, fluorescence image detection method, polarization image detection method, etc. there is

However, the roller displacement detection method is currently the most used method, but there is a problem in that signal distortion occurs at the time of thickness change and the roller is vulnerable to contamination, and is not suitable for high-speed banknote screening machines due to banknote damage, and the ultrasonic transmission method It is difficult to detect the edge tape, and there are problems in that signal distortion may occur due to crumpled bills or internal folds and contamination, and the capacitive method detects the tape attached to the corresponding area for bills containing a lot of metallic anti-counterfeiting elements. It is difficult to do, and signal distortion may occur due to crumpled bills or internal folds and contamination. As a method of using the difference in the rate at which heat is cooled after applying heat to bills, there is a problem in that there is no suitable sensor that can satisfy cost performance, and the fluorescence image detection method is difficult to detect a tape that has no or weak fluorescence reaction and is not practical There are problems, and the polarized image detection method has a problem in that it is difficult to detect a tape having a non-smooth surface, is not easy to design mechanically, and can be used only as an auxiliary means for other detection methods.

As described above, the existing method of discriminating tape bills (that is, banknotes with damaged or torn tapes) already has various problems, and there is a demand for a method for quickly and accurately discriminating tape bills by improving these problems.

The background art of the present invention is disclosed in Republic of Korea Patent Registration No. 10-0812254 (registered on March 4, 2008, bill discrimination device).

According to one aspect of the present invention, the present invention was created to solve the above problems, and accurately discriminates tape-attached bills using the optical characteristics of light, rather than the conventional roller displacement detection method or ultrasonic method. Its purpose is to provide a bill sizer and a control method thereof, which enable to do so.

In addition, as another aspect of the present invention, an object of the present invention is to provide a bill sizer and a control method thereof, which can reduce design and manufacturing costs by simplifying the mechanical configuration for discriminating bills with tape attached thereto .

Banknote straightening machine according to an aspect of the present invention, a lighting unit for generating light to be projected on the surface of the banknote is transferred into the banknote straightening machine; a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively; a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and a control unit controlling the lighting unit and processing the sensing information detected through the CIS sensor unit to discriminate the tape attached to the banknote.

In the present invention, the light projection unit is characterized in that it is formed on at least one side of the front and rear of the CIS sensor unit based on the transfer direction of the banknote.

In the present invention, the light projector is characterized in that it is formed in a form capable of projecting light vertically or projecting light obliquely at a designated angle with respect to the surface of the banknote.

In the present invention, the light projecting unit may include: a light transmission unit receiving the light generated by the lighting unit through the incident surface and transmitting the light to the light output unit; and a light output unit configured to change the propagation direction of the light transmitted through the light transfer unit and output the light to a target object through a projection surface.

In the present invention, it is characterized in that at least one corner of the light output unit is cut in order to project light obliquely in a designated direction and angle of the light projecting unit.

In the present invention, the light projecting unit is characterized in that a plurality of projections are formed in an embossed form on the light output unit in order to simultaneously project light perpendicularly or inclinedly to the bill surface through diffused reflection of light.

In the present invention, the light projecting unit is formed entirely of a transparent material in consideration of light transmission characteristics, and a material for preventing light leakage or improving reflectance is attached or applied to a designated portion.

In the present invention, in order to block light leaking from the light projection unit, the CIS sensor unit forms a light blocking unit between the CIS sensor unit and the light projection unit, or a corner of the CIS glass on the side where the light projection unit is formed. It is characterized in that a light blocking portion is formed in the.

In the present invention, it is characterized in that the width and length of the light blocking portion are set according to positions where the light projecting portions disposed on the upper and lower surfaces of the banknote can face each other.

In the present invention, the lighting unit and the light projecting unit are formed to a length corresponding to a length corresponding to the side surface of the banknote, and the lighting unit corresponds to the length at which the light projecting unit is formed, and a plurality of lights are provided on the PCB board. It is characterized in that it is formed in the longitudinal direction according to a predetermined interval.

In the present invention, the bill sizer is further formed with ribs at the top and bottom of the bill transfer path, and the final distance between the ribs formed in such a way that the transfer path is gradually narrowed by the rib is at least the light projection It is characterized in that it is formed equal to or narrower than the interval formed by the protrusion of the portion.

A method of controlling a bill sorting machine according to another aspect of the present invention includes, when bills are put into the bill sorting machine, a control unit driving incident lighting; Acquiring, by the control unit, surface images of the banknote represented by reflection and refraction of light respectively projected onto the upper and lower surfaces of the banknote by the incident illumination through CIS sensor units formed on the upper and lower front surfaces of the banknote; detecting, by the control unit, the tape attached to the banknote by processing the acquired surface image of the banknote; and performing, by the control unit, deep learning learning based on the result of the experiment while changing the location and shape of the tape attached to the banknote and the state conditions of the banknote; As the lighting units respectively generating light to be projected on the upper and lower surfaces are driven, the light generated by each lighting unit is projected vertically or inclined at a specified angle through the light projecting unit.

According to one aspect of the present invention, the boundary surface of the tape attached to the banknote ( That is, there is an effect of allowing the tape-attached bill to be accurately discriminated by making the edge) distinguishable.

In addition, as another aspect of the present invention, there is an effect of reducing design and manufacturing costs by simplifying the mechanical configuration for discriminating bills with attached tapes.

1 is an exemplary view showing a schematic configuration of a bill sizer according to an embodiment of the present invention.
FIG. 2 is an exemplary view illustrating a shape of the light projecting unit in FIG. 1;
FIG. 3 is an exemplary view showing the shape according to the number and position of the light projecting unit in FIG. 1; FIG.
FIG. 4 is an exemplary view showing an exterior shape in which a lighting unit, a light projecting unit, and a CIS sensor unit are integrally combined in FIG. 1;
FIG. 5 is an exemplary view showing a photograph taken by separating the lighting units 121 and 122 and the light projecting units 131 and 132 in FIG. 4;
6 is an exemplary view for explaining a method of detecting a tape attached to a banknote by projecting light obliquely or vertically onto the surface of the banknote according to an embodiment of the present invention.
7 is an experiment result detected according to the position and shape of the tape attached and the condition of the condition of the bill by light projected perpendicularly to the bill face or obliquely from the side part of the bill using a bill straightening machine according to an embodiment of the present invention. An example showing an image.
FIG. 8 is an exemplary diagram for explaining characteristics of tape winding being sensed by the CIS sensor unit according to the shape of the light projecting unit, the lighting unit, and the CIS sensor unit formed as shown in FIGS. 1 and 3;
FIG. 9 is an exemplary view showing a shape of a light projecting unit for diffused reflection of light in FIG. 1;
FIG. 10 is an exemplary diagram shown to explain a method of projecting light perpendicularly or at an acute angle to a surface of a bill using the shape of the light projecting unit in FIG. 1; FIG.
FIG. 11 is an exemplary view to explain a method of attaching a light blocking unit for blocking light introduced through the CIS glass of the CIS sensor unit in FIG. 1;
FIG. 12 is an exemplary diagram shown to explain a method of blocking light leakage by forming a light blocking unit between both sides of the light projecting unit and the CIS sensor unit in FIG. 11;
FIG. 13 is an exemplary view to explain a method of blocking light leakage by forming light blocking units on both sides of the light projecting unit in FIG. 11;
FIG. 14 is an exemplary diagram for explaining that the tape detection effect is improved when orthogonal light sources are formed on both sides of the CIS sensor unit in FIG. 1;
FIG. 15 is an exemplary view showing a method for preventing transmission images from being acquired in the opposite CIS sensor unit when orthogonal light sources are formed on both sides of the CIS sensor unit in FIG. 1; FIG.
16 is an exemplary view showing the form in which right-angle light sources and acute-angle light sources are formed on both sides of the CIS sensor unit in FIG. 1, and the acute-angle light source and right-angle light sources are formed to face each other on both sides of the opposite CIS sensor unit.
FIG. 17 is an exemplary diagram shown to explain another form of a vertical light source formed on at least one side of a CIS sensor unit in FIG. 1;
18 is an exemplary view showing a cross-sectional shape of a module in which a light source is integrally formed with a CIS sensor unit in FIG. 1;
19 is a flowchart for explaining a control method of a banknote sorting machine according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a banknote scanner and a control method according to the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of the lines shown in the drawing, the size and shape of the components, and the connection relationship between the components may be exaggerated or simplified for clarity and convenience of explanation, and may be conceptually described. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, definitions of these terms will have to be made based on the content throughout this specification. And throughout the specification, expressions such as "~ unit", "~ character", and "~ device" for components are not used with the intention of limiting the present invention and refer to units that perform predetermined functions or process operations. It means that it can be implemented in hardware or software or a combination thereof. In addition, the expression that a certain part includes or has a certain component means that it may further include other components without excluding the existence of other components unless otherwise stated. Also, it should be noted that contents described in each embodiment may be applied to other embodiments.

1 is an exemplary diagram showing a schematic configuration of a bill sizer according to an embodiment of the present invention. Hereinafter, in this embodiment, reflection and refraction of light irradiated (or projected) in a vertical direction or an oblique direction with respect to a tape surface A description will be given focusing on a configuration for discriminating bills with attached tapes using the same optical characteristics.

As shown in FIG. 1, the bill sizer according to the present embodiment includes a motor 110 that drives a roller (not shown) for inserting or transferring bills, the upper and lower parts of the bills (or the first surface and Lighting units 121 and 122 respectively generating light (light) to be projected on the second surface, or front and rear surfaces, etc., the light generated by each lighting unit 121, 122 is directed in a vertical direction or Light projecting units 131 and 132 that project the bill on the upper and lower surfaces of the banknote by changing the propagation direction obliquely at a designated angle, respectively, perpendicular to the upper and lower surfaces of the banknote through the respective light projecting units 131 and 132 Alternatively, CIS (Contact Image Sensor) sensor units 141 and 142 that detect tapes that are displayed (or identified) by the reflection and refraction of projected light at an angle on the upper and lower front surfaces of the banknote, respectively, and the motor ( 110) and a control unit 150 that controls the lighting units 121 and 122 and processes the sensing information detected through the CIS sensor units 141 and 142 to discriminate the tape attached to the banknote.

For reference, although FIG. 1 shows that the light generated by the lighting units 121 and 122 is projected in a vertical direction through the light projection units 131 and 132, the light projection units 131 and 132 are shown in FIG. Note that in the case of changing the shape shown in , projection may be performed by changing the traveling direction inclined at a designated angle. That is, the shape of the light projectors 131 and 132 may be changed according to the direction of light to be projected (eg, a vertical direction or a direction inclined to the bill face) (see FIG. 2 ). In addition, although the lighting units 121 and 122 and the light projecting units 131 and 132 are shown as cross-sectional views in the drawing, it should be noted that they are formed in a form extending in a direction perpendicular to the direction of the bill to be transferred.

FIG. 2 is an exemplary diagram shown in FIG. 1 to explain the shape of the light projecting unit.

Referring to FIG. 2 , the light projecting units 131 and 132 may project light in a vertical direction or inclined at a specified angle (or projected at an acute angle) depending on the shape.

Accordingly, the light projectors 131 and 132 may be implemented in various forms according to the direction in which light is to be projected.

For example, referring to FIG. 2 , the light projecting units 131 and 132 receive the light generated by the lighting units 121 and 122 through the incident surface and transmit the light to the reflecting surface (Fig. 2 (a)). 131c), a reflector (131b in (a) of FIG. 2) that changes the propagation direction of the light transmitted through the light transfer unit, and the light whose propagation direction has been changed through the reflector 131b is transmitted to the target object through the projection surface. It is formed by including an optical output unit (131a in FIG. 2(a)) outputting to (eg, banknotes).

In addition, the light projecting parts 131 and 132 are entirely made of a transparent optical material (eg, transparent acryl, glass, crystal, etc.) in consideration of light transmission characteristics, but the reflecting part (131b in FIG. 2(a)) ) A reflective material for improving reflectance may be additionally attached or coated on one side (eg, the outer side) of the ).

At this time, in addition to the purpose of reflection, the reflector 131b additionally performs the function of a light blocking unit for blocking light output to the outside of the light projectors 131 and 132 (or leaked to the outside and projected obliquely onto the banknote). A material may be attached or applied to perform the function of the light blocking unit without a reflective function, and a light blocking material may be attached or applied to perform only the function of the light blocking unit (see the light blocking unit in (d) and (e) of FIG. 2). .

In addition, the light transmission unit (131c of FIG. 2(a)) of the light projecting units 131 and 132 solves the problem of reduced reflection efficiency when light is reflected, as shown in FIG. 2(b). In consideration of this, the width of the portion in contact with the reflective surface (ie, the width of the reflective surface) may be formed narrower than the width of the incident surface. Accordingly, reflection efficiency may be further improved by allowing the incident light to be concentrated on the reflective surface having a narrow width (ie, the incident light is collected) and reflected.

In addition, as shown in (c) to (g) of FIG. 2 , in the light projectors 131 and 132, the reflector 131b is removed, and the light transmission unit 131c and the light output unit 131a are replaced. By forming only ), light (light) incident through the incident surface can be formed so that it is projected in a straight direction without being reflected. At this time, the shape of the light output unit 131a may be formed in various shapes as shown in (c) to (g) of FIG. 2 in order to adjust the direction in which light is projected. However, note that this is only a form shown to aid understanding and is not intended to limit this form.

For example, in the light projecting part 131 shown in (c) of FIG. 2, the shape of the light output part 131a is formed to have the same thickness (or width) as that of the light transmission part 131c so that light is projected in a straight direction. is a form of The light projecting unit 131 shown in (d) of FIG. 2 flatly cuts one corner of the light output unit 131a to reflect and project light from the cut portion, thereby projecting light in a straight direction. It is a form of coexisting with, and at this time, the reflection angle of light is adjusted according to the length and angle of the cut surface, so that light projected in a straight direction may not be generated. The light projector 131 shown in (e) of FIG. 2 cuts one edge of the light output unit 131a long and flat to the end of the lower edge so that the collected light proceeds while preventing reflected light from being generated. Light can be projected in a straight direction with the direction slightly inclined. The light projector 131 shown in (f) of FIG. 2 cuts both edges of the light output unit 131a long and flat to the end of the lower edge so that the reflected light does not occur and the collected light goes straight. Light can be projected in any direction. In addition, the light projecting unit 131 shown in FIG. 2 (g) has a reflective surface and a refracting surface formed at the corner of the light output unit 131a, so that the light travels at a larger angle than the form in which only the reflective surface is formed. You can also change the orientation so that you can project.

On the other hand, the light projecting parts 131 and 132 are partially leaked to the outside through the corner (ie, the projection surface) of the light output part 131a and projected at an angle (or projected at an acute angle) onto the bill face (light). In order to block, as shown in (d) and (e) of FIG. 2, after at least one side corner is cut and flattened (or chamfered), the light blocking unit is additionally attached (or applied) It can be.

At this time, the shape (eg, width, length, angle, etc.) for flattening the corner of the light output unit 131a is based on experimental values, as shown in (d) and (e) of FIG. 2, From the light projecting surface of the light output unit to the light incident surface of the light transmission unit 131c, it can be flattened short or long, and as shown in (f) of FIG. 2, both corners are cut and flattened. may be

FIG. 3 is an exemplary view showing the shape according to the position and number of light projecting units in FIG. 1 . Although the light projecting unit having one type of light output unit is illustrated as an example for convenience of explanation in FIG. 3 , it will be obvious to those skilled in the art that it may have various types.

For example, FIG. 1 is an exemplary view showing a form in which the light projecting parts 131 and 132 and the lighting parts 121 and 122 are formed in front of the CIS sensor parts 141 and 142 based on the banknote insertion direction. However, it is not limited to this, and as shown in (a) of FIG. 3, the light projecting parts 131 and 132 and the lighting parts 121 and 122 are formed behind the CIS sensor parts 141 and 142, Alternatively, as shown in (b) of FIG. 3 , the light projection units 131 and 132 and the lighting units 121 and 122 may be formed in front and rear of the CIS sensor units 141 and 142 .

In particular, as shown in (b) of FIG. 3, the light projecting parts 131 and 132 and the lighting parts 121 and 122 are formed in front and rear of the CIS sensor parts 141 and 142. In the case of , there is an advantage in that the light (light) generated by each of the lighting units 121 and 122 can be simultaneously projected (irradiated), sequentially projected (irradiated), and cross-projected (irradiated). Here, the shapes of the light projection units 131 and 132 and the light output unit 131a may be formed in any one or a combination of various examples of FIG. 2 .

4 is an exemplary view showing an external shape in which the lighting units 121 and 122, the light projecting units 131 and 132, and the CIS sensor units 141 and 142 are integrally combined in FIG. 1, and FIG. In FIG. 4 , it is an exemplary view showing a picture taken by separating the lighting units 121 and 122 and the light projecting units 131 and 132 .

However, FIGS. 4 and 5 are merely exemplified to help understand the shape and operation of the lighting units 121 and 122, the light projecting units 131 and 132, and the CIS sensor units 141 and 142, and Note that the shape may change depending on the design or model.

As shown in FIGS. 4 and 5, the lighting units 121 and 122 and the light projecting units 131 and 132 have a length corresponding to a side surface of a bill perpendicular to the bill transport direction (eg, a bill width direction). length, or the length in the longitudinal direction of the bill) may be formed to a length corresponding to or longer than that.

For reference, in the drawing according to this embodiment, the side of the banknote is shown as meaning the rear side with respect to the banknote transport direction, but is not limited thereto, and at least one of the front side and left and right sides with respect to the banknote transport direction It should be understood as meaning the side.

In addition, the lighting units 121 and 122 correspond to the length of the light projecting units 131 and 132, and a plurality of lighting elements (eg, LEDs) are formed in the longitudinal direction at predetermined intervals on the PCB board. .

At this time, the lighting elements (eg, LED) of the lighting units 121 and 122 consider the discrimination performance, and at least one wavelength range of light (eg, RED, GREEN, BLUE, YELLOW, WHITE, UV, IR, etc.) can be formed to output. In addition, when forming the lighting element of the lighting unit to output light of such a predetermined wavelength range, it may be implemented as a lighting element having at least one function corresponding to it.

Referring back to FIG. 1, the light projecting units 131 and 132 structurally project light in a vertical direction or at an angle (ie, in an acute angle direction) to the upper and lower surfaces of the banknote, and the CIS sensor unit 141, 142) may be implemented in a form that protrudes more than the surface. In this case, in order to prevent problems that may cause obstacles in the transfer of bills introduced by the projections of the light projectors 131 and 132, ribs may be additionally formed at upper and lower portions of the bill inputting direction. Here, in the case of projecting light only in the vertical direction to the upper and lower surfaces of the banknote, the surfaces of the light projection units 131 and 132 are flush with the surfaces of the CIS sensor units 141 and 142, or the height is slightly lower than that. It can also be formed to be a surface of .

At this time, the final interval between the ribs formed in such a way that the transport path is gradually narrowed by the ribs is at least the interval before the bill passes through the light projection units 131 and 132. ) is formed to be equal to or narrower than the interval formed by the protruding part (e.g., the reflection part and part of the light output part, the light projection surface of the light output part), so that the transfer of the inserted bills is not disturbed, the stable transfer of the bills is guided. .

Hereinafter, the principle and method of detecting the tape attached to the banknote by projecting light obliquely or vertically onto the surface of the banknote in this embodiment as described above will be described with reference to FIGS. 6 to 9 .

6 is an exemplary diagram for explaining a method of detecting a tape attached to a bill by projecting light obliquely or vertically onto the surface of the bill according to an embodiment of the present invention.

6(a) is an exemplary diagram for explaining a method of detecting a tape attached to a banknote by projecting light obliquely (ie, at an acute angle) onto the surface of the banknote, and FIG. It is an exemplary diagram for explaining a method of detecting a tape attached to a banknote by vertically projecting light.

Referring to (a) of FIG. 6 , when light (ray) emitted from the light output unit is projected (incident) to an object having a different medium, a portion of the light is reflected at the interface between the two media and a portion is refracted and transmitted.

At this time, when looking at an object from a plane on which light is incident (that is, a plane with a normal line), a phenomenon caused by reflected light is easily detected, but a phenomenon caused by refracted light is not easily detected. However, when looking at an object from a side perpendicular to the plane on which the light is incident (i.e., a plane perpendicular to the plane with the normal), a phenomenon caused by light refracted at the boundary of the object (e.g., brighter at the boundary) loss) can be easily detected.

For example, as shown in (a) of FIG. 6, assuming that the tape is attached to a partial region of the upper front of the banknote, when the light ray 1 is obliquely projected (incident) to the upper front of the banknote, the upper front (ie, , CIS sensor unit formed on the upper front) cannot detect a phenomenon caused by light refracted at the boundary of an object (ie, tape) (eg, a phenomenon that becomes brighter at the boundary).

However, when light ray 2 is projected (incident) obliquely (at an acute angle) at a specified angle from the side of the bill, the light refracted at the boundary of the object (ie, tape) on the upper front (ie, CIS sensor unit formed on the upper front) It is possible to easily detect a phenomenon caused by (eg, a phenomenon detected more brightly at the boundary surface portion).

In addition, when light beam 2 is projected (incident) obliquely (at an acute angle) at a specified angle from the side of the bill, a difference in light reflectance occurs between the side where the tape is not attached and the side where the tape is attached, so that the upper front of the bill In the formed CIS sensor unit, the side to which the tape is attached is detected as darker than the side to which the tape is not attached.

In other words, the surface of the banknote to which the tape is not attached is uneven and bumpy because patterns are printed on it, so light projected obliquely from the side causes diffuse reflection, and the area where the tape is attached (i.e., the surface of the tape) has an even and smooth surface. Because it is raining, total reflection takes place.

Therefore, the tape area is perceived as dark because the light incident on the CIS sensor units 141 and 142 is small due to total reflection, and the area where the tape is not attached (ie, the surface of the banknote) has relatively low light incident on the CIS sensor unit due to diffuse reflection Many are perceived as bright. In particular, light projected obliquely (at an acute angle) in the boundary region of the tape is perceived more brightly because irregular reflection occurs not only on the surface of the banknote but also on the edge of the tape (ie, the side part of the tape).

Therefore, as illustrated in FIG. 7, since the tape attachment area can be identified by looking at the images acquired by the CIS sensor units 141 and 142 according to the present invention, these images are processed and analyzed to determine whether or not the tape is attached ( or tape outline area) is determined.

7 is an experiment result detected according to the position and shape of the tape attached and the condition of the condition of the bill by light projected perpendicularly to the bill face or obliquely from the side part of the bill using a bill straightening machine according to an embodiment of the present invention. As examples showing images, (a) is an image showing a normal bill, and (b) to (g) are images showing a bill with a tape attached thereto. In particular, (b) and (c) of FIG. 7 are images showing that the tape is attached to the central surface of the banknote, and (d) and (e) of FIG. Figure 7 (f) is an image showing that the tape is attached to the upper edge of the bill, Figure 7 (g) is an image showing that the tape is attached to the central surface of the crumpled bill.

As shown in FIG. 7, as a result of various experiments by projecting light obliquely (at an acute angle) from the side of the banknote and changing the position and shape of the tape attached to the banknote and the state conditions of the banknote, the tape is attached to the banknote. Regardless of the location (e.g., center plane, corner, etc.) and shape and condition of the bill (e.g., crumpled bill, folded bill, flat bill, etc.), the tape-attached boundary portion was clearly detected. It can be seen that the side of the bill was detected darker than the side of the bill to which the tape was not attached.

As described above, when light is projected obliquely (at an acute angle) from the side surface of the bill, the sensing characteristics of the tape will be described in more detail with reference to FIG. 8 .

FIG. 8 is an exemplary view to explain characteristics of tape winding being sensed by the CIS sensor unit according to the shapes of the light projecting unit, the lighting unit, and the CIS sensor unit formed as shown in FIGS. 1 and 3 .

First, in (a) of FIG. 8 , as shown in FIG. 1 , the light projecting units 131 and 132 and the lighting units 121 and 122 are connected to the CIS sensor unit based on the banknote insertion (transfer) direction. In the form formed in front of (141, 142), when light is projected obliquely (at an acute angle) from the left side of the bill (ie, from the rear of the bill traveling direction), on the upper front (ie, upper front) of the bill Formed CIS sensor unit), light is totally reflected on the side where the tape is attached and sensed darkly, and a lot of diffuse reflection occurs on the side (e.g., left side) where the light is projected (incident) (ie, the area where the tape is not attached and the edge boundary area of the tape). It is sensed brighter than the upper front surface and becomes a shadow area on the opposite side (right side) of the direction in which light is projected (incident) and has a characteristic of being sensed darker than the upper front surface.

In addition, in (b) of FIG. 8, as shown in (a) of FIG. 3, the light projecting units 131 and 132 and the lighting units 121 and 122 are based on the banknote insertion (transfer) direction. In the form formed at the rear of the CIS sensor units 141 and 142, when light is projected obliquely (at an acute angle) from the right side of the bill (ie, from the front of the bill traveling direction), the upper front of the bill (ie. , CIS sensor part formed on the upper front), the light is totally reflected on the tape surface and sensed darkly, and on the side where the light is projected (incident) (e.g., the right side), a lot of diffuse reflection occurs and is sensed brighter than the upper front, and the light is projected ( The opposite side (left side) of the direction of incidence) becomes a shadow area and has a characteristic of being sensed darker than the upper front.

In addition, in (c) of FIG. 8, as shown in (b) of FIG. 3, the light projecting units 131 and 132 and the lighting units 121 and 122 are configured based on the banknote insertion (transfer) direction. In the form formed on both the front and rear of the CIS sensor units 141 and 142, when light is projected obliquely (at an acute angle) from the left and right sides of the bill, when light is crossed or sequentially projected (irradiated) Depending on the projection (irradiation) direction of light, there are sensing characteristics as described with reference to (a) and (b) of FIG. In addition, in the case of simultaneous projection (irradiation) from the left and right sides of the bill at an angle (at an acute angle), the light is totally reflected from the tape surface on the upper front of the bill (ie, the CIS sensor unit formed on the upper front) and sensed darkly, and the light is projected. A lot of diffuse reflection occurs on both sides (eg, left and right) of (incident), and there is a characteristic that it is sensed brighter than the upper front.

As described above, according to the embodiments of the present invention, since light reflection occurs differently on the bill surface (ie, the tape unattached area surface), the tape attaching surface (ie, the tape attaching area surface), and the edge boundary area of the tape, respectively, these Since it can be identified in the acquired banknote image due to the difference in brightness, it is possible to determine the banknote with the tape attached thereto.

However, when light is projected obliquely (at an acute angle) from the side of the bill to detect the tape winding as described above, there may be a tendency to emphasize not only the outline of the tape but also the wrinkles of the bill, depending on the type of bill. As shown in (a) and (b), the outline (boundary) of the tape on the side where light is not projected tends to be darker than the side where light is projected on the opposite side, and in the case of tapes made to have total reflection characteristics, the brightness decreases even if there is no polarization. tend to become

Therefore, in this embodiment, in order to more accurately detect the tape winding, as shown in FIG. 6 (b), a method of detecting the tape attached to the bill by projecting light in a direction perpendicular to the bill face is additionally performed. or can be performed independently.

Referring to (b) of FIG. 6, when light (light) is projected (incident) perpendicularly to the bill face, the light projected into the tape spreads throughout the tape through internal refraction and reflection, and then the width is As a large amount of light is emitted from the interface of the narrow tape, the interface becomes brighter compared to the bill face.

As a result of analyzing the tape roll image detected by projecting light (light) perpendicularly to the bill face as described above, in the case of a severely crumpled bill, light is projected (incident) at an angle (at an acute angle) to the bill face to detect the tape roll. Compared to the method, wrinkles on bills are hardly visible, and more distinct borders are visible in some sizes (eg 5mm) or larger, but the borders (outlines) of the tape are clearly visible regardless of the size, and in the case of total reflection tape, the brightness does not decrease, so the borders It can be seen that this is clearly visible, and even in the case of a matte tape (an opaque and embossed tape), there is an advantage in that the boundary surface is detected more brightly, although it is relatively weak.

Accordingly, the control unit 150 may selectively detect the tape winding by projecting (incident) light perpendicularly to the bill face or by projecting (incidence) light at an angle (at an acute angle) to the bill face, or in the vertical direction and It is also possible to detect tape winding by simultaneously projecting light at an angle.

For example, when the tape attached to the banknote passes through the light projecting unit 131 as the bill is transported, the light projected vertically from the light projecting unit 131 is not transmitted through the tape, or the tape width is too small, so the CIS sensor When the tape reaches the portion 141, when the light projected vertically from the light projecting portion 131 is not transmitted through the tape, the light may be projected (incident) to the surface of the bill at an angle (at an acute angle).

At this time, in order to simultaneously project the projection direction of the light perpendicularly or obliquely (at an acute angle) to the bill face, as shown in FIGS. ) may be formed on the front and rear sides, and as shown in FIG. 9, the light output unit 131a of the light projecting unit 131 is formed in an embossed form (ie, a plurality of protrusions are formed on the light output unit) Light may be diffusely reflected in multiple directions.

FIG. 9 is an exemplary view showing a shape of a light projecting unit for diffused reflection of light in FIG. 1 . However, when projecting light in multiple directions as described above, since a larger amount of light is required than in the case of projecting light in only one vertical direction, the thickness of the light projection unit 131 is formed thicker or emission control is performed. It is desirable to further increase the light output through the.

In addition, in this embodiment, the tape winding may be detected by controlling the projection direction of light as described above, but the detection performance may be improved by simultaneously projecting a plurality of light sources (eg, White + UV) to detect the tape winding.

For example, when only a light source projected at a right angle is used, the matte tape image is detected blurryly, when only a UV (Ultra Violet) light source is used, only the matte tape is detected clearly, and when only a light source projected at an acute angle is used, the bill is very crumpled. Although it was difficult to detect the tape in , if a plurality of light sources (eg, White + UV) are projected vertically and at an acute angle simultaneously, the effect of detecting the tape can be obtained even with very severely crumpled bills.

In addition, when using only a right angle light source projected perpendicularly to the banknote surface or an acute angle light source projected obliquely (at an acute angle) onto the banknote surface, the tape detection performance differs depending on the state of the banknote or the characteristics of the tape attached to the banknote. tends to occur. Accordingly, in this embodiment, as shown in (a) and (b) of FIG. 10 , a right angle light source and an acute angle light source may be simultaneously used by forming a reflector 131b at one corner of the light projector 131. (see FIG. 2(d)), and if there is difficulty in detecting the tape due to the acute angle light source, a light blocking unit may be attached to block light leaking through the reflecting unit 131b (FIG. 2). (d), (e)). At this time, as shown in (c) of FIG. 10, different types of light projection units 131 capable of projecting light in different directions may be attached to both sides of the CIS sensor unit 141. , As shown in (d) of FIG. 10 , light projecting units 131 having the same shape may be attached to both sides of the CIS sensor unit 141 . At this time, depending on the direction of the light to be projected, a corresponding type of light projecting unit 131 may be attached (see (e) and (g) of FIG. 2).

Meanwhile, even if a light blocking unit is attached to block light leaking through the reflecting unit 131b, as shown in FIG. 11, the sensing surface of the CIS sensor unit 141 has a specific thickness to protect the sensor. A CIS glass is attached, and light introduced from the side boundary of the CIS glass may adversely affect the sensor (eg, CIS Lod Lens).

Accordingly, in the present embodiment, a light blocking portion (eg, a barrier rib) may be formed on both front and rear boundary surfaces of the CIS glass. Accordingly, by blocking the light leaking from the light projector 131 from entering the sensor (eg, CIS Lod Lens) through the CIS glass, the contour of the tape is detected more clearly and the detection performance of the contaminated tape is improved. effect can be obtained.

Here, a light blocking portion (eg, a barrier rib) attached to the CIS glass in order to block leakage light flowing into the CIS glass is CIS in contact with the light projector 131, as shown in FIG. 11 . It may be formed only on the corner boundary surface of the glass, or as shown in FIG. 12, a light blocking portion (eg, a barrier rib) may be formed between both sides of the light projecting unit 131 and the CIS sensor unit 141. Alternatively, as shown in FIG. 13 , light blocking units may be formed on both sides of the light projecting unit 131 . At this time, the length (or height) of the light projecting part 131 is made shorter than the length (or height) of the CIS sensor part 141 (that is, deeper based on the CIS glass), so that the leakage light blocking effect is achieved. could be improved further.

Meanwhile, as already described with reference to FIG. 3 , the light projection units 131 and 132 and the lighting units 121 and 122 have a right angle light source formed only on one side of the CIS sensor units 141 and 142, When formed on both the front and rear sides of the CIS sensor units 141 and 142, as shown in (a) and (b) of FIG. 14, an effect of enabling detection of an image with a clear boundary surface of the entire tape can be obtained. there will be

However, as described above, when orthogonal light sources (that is, vertical light sources projecting light perpendicular to the banknote surface) are formed on both the front and rear sides of the CIS sensor units 141 and 142, as shown in (a) of FIG. , According to the structural characteristics of the bill sizer, the CIS modules attached to the top and bottom of the bill (see FIG. 4, a module in which a lighting unit, a light projection unit, and a CIS sensor unit are integrally combined) are slightly staggered. Accordingly, the light projected from the light projection units 131 and 132 formed on one side of one CIS module may be directly projected onto the CIS sensor unit 141 of the opposite CIS module, so that a through image is obtained when acquiring a banknote image. problems may arise.

Therefore, in this embodiment, the CIS modules are structurally staggered, so that the CIS sensor unit 141 can obtain a through image of the banknote by the light projected from the opposite light projectors 131 and 132. Prevents the occurrence of a problem To do this, as shown in (b) to (g) of FIG. 15, the thickness of the light blocking portion formed between the CIS sensor units 141 and 142 and the light projecting units 131 and 132 is adjusted so that the opposite side Even if the light projecting units 131 and 132 are configured to face each other, it is possible to prevent transmission images from being acquired by scattering light projected from one light projecting unit 131 through the opposite light projecting unit 132. .

At this time, as shown in (d) of FIG. 15, by matching the length (or height) of the light projection units 131 and 132 to the ends of the sensor surfaces of the CIS sensor units 141 and 142, the light projection The parts 131 and 132 are brought closer to the surface of the bill to maximize light efficiency.

For example, if the light projected from the light projectors 131 and 132 is further away from the banknote surface, the projected range of the light spreads and the amount of light projected onto the tape decreases, resulting in a smaller amount of light emitted at the interface of the tape. Although the detection performance deteriorates, in the present embodiment, the light projecting units 131 and 132 are disposed as close to the banknote surface as possible to maximize light efficiency, thereby improving the detection performance of the tape interface.

In addition, as shown in (e) and (f) of FIG. 15, the light blocking portion formed in the form of a barrier rib between the light projecting units 131 and 132 and the CIS sensor units 141 and 142 (for convenience, side light A light blocking portion (referred to as a surface light blocking portion for convenience) may be additionally formed (or attached) to a surface of CIS glass adjacent to an end of the light blocking portion (referred to as a blocking portion). At this time, the length of the light blocking part (surface light blocking part) formed on the surface of the CIS glass may be formed to a constant length based on the end edge of the side light blocking part.

In addition, as described with reference to FIG. 2, the shape of the light projecting units 131 and 132 may be changed into various shapes according to embodiments, but this shape is the light projecting unit 131 and 132 as much as possible. It is implemented in a form in which the light output from is not projected (inflowed) to the CIS sensor units 141 and 142.

At this time, the light blocking part (surface light blocking part) formed on the surface of the CIS glass is a light barrier formed between the light projecting parts 131 and 132 and the CIS sensor parts 141 and 142. It is separated from the blocking part (referred to as a side light blocking part for convenience) and formed (or attached) independently, or as shown in FIG. 15(g), the end of the side light blocking part is directed toward the CIS glass. It may be formed in the form of a wedge protruding by a specified length to cover the end of the CIS glass.

On the other hand, although not specifically shown in the drawings, the bill sizer according to the present embodiment is a low-resolution CIS module dedicated to tape detection (ie, a low-resolution CIS sensor unit) in addition to a high-resolution CIS module (ie, a module in which a high-resolution CIS sensor unit and a light projecting unit are combined). and a light projecting unit combined module) may be additionally added.

Accordingly, tape detection, denomination recognition, and orthogonal discrimination are performed through the high-resolution CIS module, and tape detection is performed through the low-resolution CIS module. As a result of testing this, it can be seen that the performance is improved as a 3mm wide tape can be detected through the low resolution CIS module.

FIG. 16 is an exemplary view showing the form in which right-angle light sources and acute-angle light sources are formed on both sides of the CIS sensor unit in FIG. 1, and the acute-angle light source and right-angle light sources are formed to face each other on both sides of the opposite CIS sensor unit.

Referring to FIG. 16 , light projection units 131 and 132 are respectively formed in front and rear of the CIS sensor units 141 and 142 .

For convenience of description, when the light projecting unit 131 formed in front of the first CIS sensor unit 141 is an acute light source that projects light obliquely at a specified angle (or projects it at an acute angle), the opposite second CIS sensor A right angle light source for vertically projecting light is formed in front of the unit 142 . Likewise, when the light projecting unit 132 for vertically projecting light is formed at the rear of the first CIS sensor unit 141, the rear of the second CIS sensor unit 142 on the opposite side tilts the light at a specified angle. An acute angle light source projecting (or projecting at an acute angle) is formed.

At this time, the light projector 131 of the acute angle light source that projects the light obliquely at a designated angle (or projects it at an acute angle), as described with reference to FIG. 2, the angle of the reflector 131b and the light output unit 131a ) can be formed by various combinations of shapes.

Accordingly, when the light projection unit 131 of the acute angle light source is formed as enlarged in FIG. The light reflected at a first angle according to the reflection angle of the reflector 131b or #1 is output through the light output unit 131a or #2.

At this time, the light entering the light output unit 131a, #2 is at a second angle relative to the horizontal, and the light finally output into the air by adding the inclination angle of the light output unit 131a, #2 is becomes the third angle. Here, assuming that the refractive index of the light projection unit 131 is 1.49, the light incident on the light output unit 131a, #2 is refracted and the light output into the air is the light output unit 131a, #2. It forms a fourth angle with the boundary of That is, the light output into the air from the light output unit 131a (#2) propagates slightly upward at the fifth angle with respect to the horizontal reference (that is, the light with the upward elevation of the fifth angle with respect to the horizontal reference is irradiated). do).

Accordingly, as described above with reference to FIG. 3 , when a right angle light source and an acute angle light source are respectively formed on both sides of the CIS sensor units 141 and 142 (see FIG. 16 ), the CIS sensor units 141 and 142 When a light source is formed on only one side (see FIG. 14(a)) and when the same light source (eg, right angle light source, acute angle light source) is formed on both sides of the CIS sensor units 141 and 142 (see FIG. 14(b)) ), it is possible to obtain the effect of enabling the detection of an image where the entire boundary surface of the tape is more distinct.

FIG. 17 is an exemplary diagram shown to explain another form of a vertical light source formed on at least one side of the CIS sensor unit in FIG. 1 .

Referring to (a) of FIG. 17, the length (or height) of the light projecting part 131 is set relative to the light blocking part (eg, barrier rib) in order to block light leaking into the CIS glass. Since the sensor unit 141 is formed shorter than the length (or height) of the sensor unit 141 (that is, deeper based on the CIS glass), the leakage light blocking effect may be further improved. At this time, the light blocking portion (eg, barrier rib) is formed on both sides of the light projecting portion 131 .

Referring to (b) of FIG. 17 , in (a) of FIG. 17 , only a light blocking portion (eg, a barrier rib) may be formed without forming the light projecting portion 131 . That is, in (b) of FIG. 17, the light that does not pass through the light projecting part 131 passes through the air between the light blocking parts (eg, barrier ribs) and is formed to emit light vertically.

1 to 17, the light projection units 131 and 132, the lighting units 121 and 122, and the light blocking unit ( Example: The form of adding a light source (eg, acute angle light source, right angle light source) formed by combining barrier ribs has been described.

However, the light source (eg, an acute angle light source or a right angle light source) may be integrally formed inside the CIS sensor units 141 and 142 (or CIS sensor module).

In this way, when the light source (eg, acute angle light source, right angle light source) is integrally formed inside the CIS sensor units 141 and 142 (or CIS sensor module) and implemented in the form of a single module, the assembly process can be omitted. There is an effect of enabling a more stable sensing operation to be performed.

FIG. 18 is an exemplary view showing a cross-sectional shape of a module in which a light source is integrally formed in the CIS sensor unit in FIG. 1, and is an electronic circuit board ( Electronic components for driving (other electronic components) are attached to one side of the PCB), and a sensor (eg phototransistor) and a plurality of lighting units 121 are attached to the other side, and the sensor (eg phototransistor) A sensor light guide (eg, rod lens) is formed on the upper part of the light projection unit 131 is formed on the upper part of the plurality of lighting units 121, respectively, and the light guide for the sensor and the light projection unit 131 are formed. ), a light blocking portion (eg, barrier rib) is formed between them.

Here, the lengths of the light guide for the sensor (eg rod lens), the light projection unit 131 and the light blocking unit (eg partition wall) are limited by the case, and in the drawing, the light projection unit 131 is at right angles. Although shown in the form of a light source, note that the light projecting unit 131 can be deformed into various forms as described above.

19 is a flowchart for explaining a control method of a bill sizer according to an embodiment of the present invention.

Referring to FIG. 19, when a bill is input (S101), the control unit 150 drives incident lighting (eg, lighting that projects light vertically or at an acute angle on the surface of the bill depending on the shape of the light projector) ( S102).

Here, the side incident illumination, in FIGS. 1 and 2, refers to the lighting units 121 and 122 respectively generating light (light) to be projected vertically or obliquely onto the upper and lower surfaces of the bill to be transported, As the lighting units 121 and 122 are driven, the light generated by each of the lighting units 121 and 122 through the light projecting units 131 and 132 is vertically projected or changed at a specified angle to the top of the banknote. are projected onto the and lower surfaces, respectively.

In addition, the controller 150 vertically projects on the upper and lower surfaces of the banknote from the respective light projecting units 131 and 132 through the CIS sensor units 141 and 142 formed on the upper and lower front surfaces of the banknote, or A banknote image (i.e., banknote surface image) sensed and generated by reflection and refraction of light projected at a specified angle is acquired (S103), and the obtained banknote image (i.e., banknote surface image) is processed to attach to the banknote The tape is detected (identified) (S104).

In addition, the control unit 150 additionally performs deep learning learning based on the results of the experiment by changing the location and shape of the tape attached to the banknote and condition conditions (ie, experimental conditions) of the banknote (S105).

As described above, in the case of the conventional method of detecting the amount of roller displacement and detecting the tape roll (ie, the tape attached bill), the present embodiment reduces the rotational speed of the motor (eg, input motor, transfer motor) due to mechanical characteristics. By improving the problems that were difficult to increase (e.g., damage to banknotes during high-speed processing), tapes can be detected by projecting light perpendicularly or inclined to the bill face, so that tapes are quickly removed. It enables accurate identification, and also has the effect of reducing design and manufacturing costs by simplifying the mechanical configuration for identifying bills with tapes attached.

The present invention has been described above with reference to the embodiments shown in the drawings, but this is only exemplary, and those skilled in the art can make various modifications and equivalent other embodiments. you will understand the point. Therefore, the technical protection scope of the present invention should be determined by the claims below. Implementations described herein may also be embodied in, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Even if discussed only in the context of a single form of implementation (eg, discussed only as a method), the implementation of features discussed may also be implemented in other forms (eg, an apparatus or program). The device may be implemented in suitable hardware, software and firmware. The method may be implemented in an apparatus such as a processor, which is generally referred to as a processing device including, for example, a computer, microprocessor, integrated circuit, programmable logic device, or the like.

110: motor 121, 122: lighting unit
131, 132: light projection unit 141, 142: CIS (Contact Image Sensor) sensor unit
150: control unit

Claims (12)

a lighting unit for generating light to be projected onto a surface of a bill being put into and transported into the bill sorting machine;
a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively;
a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and
A controller that controls the lighting unit and discriminates the tape attached to the banknote by processing the outline area of the tape to be identified with a greater brightness difference than the bill area and the tape area in the surface image of the banknote sensed through the CIS sensor unit; A banknote sorter, characterized in that it comprises.
The method of claim 1, wherein the light projecting unit,
Banknote sorting machine, characterized in that formed on at least one side of the front and rear of the CIS sensor unit based on the transfer direction of the banknote.
The method of claim 1, wherein the light projecting unit,
Based on the face of the bill, the bill straightener characterized in that formed in a form capable of projecting light vertically or projecting light obliquely at a specified angle.
a lighting unit for generating light to be projected onto a surface of a bill being put into and transported into the bill sorting machine;
a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively;
a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and
A controller for controlling the lighting unit and processing the sensing information detected through the CIS sensor unit to discriminate the tape attached to the banknote; including,
The light projecting unit,
a light transmission unit receiving the light generated by the lighting unit through an incident surface and transmitting the light to a light output unit; and
A banknote scanner, characterized in that it is formed including a; light output unit for changing the traveling direction of the light transmitted through the light transmission unit and outputting it to the target object through the projection surface.
a lighting unit for generating light to be projected onto a surface of a bill being put into and transported into the bill sorting machine;
a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively;
a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and
A controller for controlling the lighting unit and processing the sensing information detected through the CIS sensor unit to discriminate the tape attached to the banknote; including,
The light projecting unit,
In order to project light obliquely in a designated direction and angle, at least one corner of the light output unit is cut.
a lighting unit for generating light to be projected onto a surface of a bill being put into and transported into the bill sorting machine;
a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively;
a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and
A controller for controlling the lighting unit and processing the sensing information detected through the CIS sensor unit to discriminate the tape attached to the banknote; including,
The light projecting unit,
A banknote scanner, characterized in that a plurality of protrusions are formed in an embossed form on the light output part in order to simultaneously project light perpendicularly or obliquely to the surface of the bill through diffuse reflection of light.
a lighting unit for generating light to be projected onto a surface of a bill being put into and transported into the bill sorting machine;
a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively;
a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and
A controller for controlling the lighting unit and processing the sensing information detected through the CIS sensor unit to discriminate the tape attached to the banknote; including,
The light projecting unit,
It is formed of a transparent material as a whole in consideration of the transmission characteristics of light,
A paper money sorting machine characterized in that a material for preventing light leakage or improving reflectance is attached or applied to a designated part.
a lighting unit for generating light to be projected onto a surface of a bill being put into and transported into the bill sorting machine;
a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively;
a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and
A controller for controlling the lighting unit and processing the sensing information detected through the CIS sensor unit to discriminate the tape attached to the banknote; including,
The CIS sensor unit,
In order to block light leaking from the light projector,
A light blocking part is formed between the CIS sensor part and the light projecting part, or
Banknote straightening machine, characterized in that the light blocking portion is formed at the corner of the CIS glass on the side where the light projecting portion is formed.
The method of claim 8, wherein the width and length of the light blocking portion,
A banknote sorting machine, characterized in that the light projecting parts disposed on the upper and lower surfaces of the banknote are set to match positions that can face each other.
a lighting unit for generating light to be projected onto a surface of a bill being put into and transported into the bill sorting machine;
a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively;
a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and
A controller for controlling the lighting unit and processing the sensing information detected through the CIS sensor unit to discriminate the tape attached to the banknote; including,
The lighting unit and the light projecting unit,
It is formed with a length corresponding to the length corresponding to the side of the banknote,
the lighting unit,
Corresponding to the length at which the light projecting part is formed, a plurality of lights are formed in the longitudinal direction at predetermined intervals on the PCB board.
a lighting unit for generating light to be projected onto a surface of a bill being put into and transported into the bill sorting machine;
a light projecting unit that projects the light generated by the lighting unit vertically or tilts it at a specified angle so that the light is projected onto the banknotes respectively;
a CIS (Contact Image Sensor) sensor unit for sensing a surface image of a banknote obtained by reflection and refraction of light projected through the light projecting unit; and
A controller for controlling the lighting unit and processing the sensing information detected through the CIS sensor unit to discriminate the tape attached to the banknote; including,
The banknote sorter,
Ribs are additionally formed at the top and bottom of the banknote transfer path,
The final distance between the ribs formed by the ribs in a form in which the conveying path gradually narrows is at least equal to or narrower than the distance formed by the protrusion of the light projector.
When banknotes are put into the banknote sorting machine, driving the incident light by a controller;
Acquiring, by the control unit, surface images of the banknote represented by reflection and refraction of light respectively projected onto the upper and lower surfaces of the banknote by the incident illumination through CIS sensor units formed on the upper and lower front surfaces of the banknote;
detecting, by the control unit, the tape attached to the banknote by processing the acquired surface image of the banknote; and
Including; performing deep learning learning by the controller based on the result of the experiment by changing the location and shape of the tape attached to the banknote and the state conditions of the banknote,
The incident light,
As the lighting unit for generating light to be projected on the upper and lower surfaces of the bill being transported is driven, the light generated by each lighting unit is projected vertically or inclined at a specified angle through the light projecting unit. A control method of a paper money sorting machine characterized by

Images