KR20180014462A - Apparatus and method for detecting tape on banknote using active polarizing filters - Google Patents

Abstract

The present invention relates to a tape detecting device and method for detecting a tape using an active polarizing filter, including: a light emitting portion for emitting light of the predetermined wavelength so as to irradiate the light to at least a part of a banknote; a light receiving portion for detecting polarized light emitted from the light emitting portion and reflected from the banknote; an active polarizing filter positioned in an optical path between the light emitting portion and the light receiving portion and being switched between a first polarizing filter state and a second polarizing filter state; and a tape detecting portion for determining whether or not a tape is attached to the part of the banknote to which the light is irradiated, based on the intensity of the polarized light detected by the light receiving portion.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for detecting a tape using an active polarized light filter,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for detecting a tape adhered to papers such as paper money.

In general, a bill processing apparatus such as a bill counter or a billing machine automatically counts a plurality of bills to be input using a mechanical / electronic device, detects a counterfeit, detects whether the bill is damaged or not, It is also used to process not only bills but also securities such as checks.

The above-described banknote handling apparatus is provided with a charging unit in which a plurality of banknotes are stacked on an upper side of a main body having a display unit and an operating unit for a user, and a discharging unit for discharging the counted banknotes are formed on the lower side, A plurality of rollers driven by the gears and the electric motor of the belt, and the bills stacked on the loading unit are conveyed one by one to the inside of the counter by the frictional force caused by the rotation of the rollers, and are finally transferred to the discharge unit.

Meanwhile, the bill processing apparatus has a function of detecting a tape attached to a banknote and sorting the banknote into damaged banknotes. In the conventional banknote processing apparatus, a thick roller that physically contacts the banknote is used, or a non-contact type (Ultrasonic Sensor) was used to detect the tape.

When a tape attached to a banknote is detected using a contact-type thick roller, noise is largely generated, and a detection error may occur due to foreign matter adhering to the roller.

Further, when a tape attached to a bill is detected by using a non-contact type ultrasonic sensor, the tape detection rate may be lower than when a contact type thick roller is used. Due to the characteristics of the ultrasonic sensor itself, There was a sensitive issue.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape detecting apparatus and method which are improved in detection rate and are resistant to the surrounding environment.

It is still another object of the present invention to provide a bill processor such as a bill counter, a counterfeit detector, an ATM (automated teller machine), etc., to which the tape detecting apparatus and method are applied.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, There will be.

A tape detecting apparatus according to an embodiment of the present invention detects a tape attached to a bill, emits light of a predetermined wavelength, and emits light to at least a part of the bill; A light receiving unit for detecting polarized light emitted from the light emitting unit and reflected from the bill; An active polarized light filter disposed in an optical path between the light emitting portion and the light receiving portion and being switched between a first polarization filter state and a second polarization filter state; And a tape detecting section for determining whether or not a tape is attached to a part of the paper money to which the light is irradiated based on the intensity of the polarized light detected by the light receiving section, wherein the first and second polarizing filters have different polarization components .

The bill processing apparatus according to an embodiment of the present invention may include the tape detecting apparatus and a transfer unit for sequentially inputting a plurality of bills to be input in the direction of the bill tape detecting apparatus.

According to another aspect of the present invention, there is provided a tape detection method comprising: illuminating at least a part of a bill with light using an LED that emits light of a predetermined wavelength; Detecting polarized light reflected from the banknote by light emitted from the LED, using an active polarized light filter that is switched between a first polarized light filter state and a second polarized light filter state that pass different polarized light components; And an intensity of a first polarized light detected by the light receiving unit in the first polarized light filter state and an intensity of a second polarized light detected by the light receiving unit in the second polarized light filter state, And judging whether or not a tape is attached to a part of the banknote.

At least some of the steps of the tape detection method may be embodied as a computer-readable recording medium having recorded thereon a program for execution on a computer.

According to one embodiment of the present invention, a polarizing filter for passing a specific polarized light component is disposed in the light path between the light emitting portion and the light receiving portion, so that the tape is detected based on the intensity of the polarized light reflected from the banknote, Can be improved.

According to another embodiment of the present invention, two or more polarizing filters for passing different polarized components are disposed on the front surface of the light emitting portion or the light receiving portion, and the presence or absence of the tape is judged based on the intensity of the polarized light passed through the light emitting portion or the light receiving portion, The tape attached to the bill or the like can be more accurately detected.

According to another embodiment of the present invention, an active polarized light filter that is switched between two or more polarizing filter states through which different polarized components pass is disposed on the front surface of the light emitting portion or the light receiving portion, have.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and form a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given above, serve to further the understanding of the technical idea of the invention. And should not be construed as interpretation.
1 is a view showing a first embodiment of a configuration of a bill processing apparatus according to the present invention.
2 is a view showing a second embodiment of a configuration of a bill processing apparatus according to the present invention.
3 is a block diagram showing a configuration of a bill tape detecting apparatus according to an embodiment of the present invention.
4 is a flowchart showing a bill tape detection method according to an embodiment of the present invention.
5 and 6 are views for explaining embodiments of a method of detecting a tape attached to a bill using a light emitting portion, a light receiving portion, and a polarizing filter.
FIGS. 7 and 8 are views showing embodiments of a structure in which a light emitting portion, a light receiving portion, and a polarizing filter are arranged.
FIGS. 9 and 10 are diagrams for explaining embodiments of a method of detecting a tape attached to a bill by using a plurality of sensor modules each composed of a light emitting portion, a light receiving portion, and a polarizing filter.
Figs. 11 and 12 are views for explaining embodiments of a method of detecting a tape attached to a lower side of a banknote. Fig.
13 is a graph for explaining an embodiment of a method for determining whether or not a tape is attached according to intensity of a polarized light detected by a light receiving unit.
Figs. 14 and 15 are views for explaining embodiments of a method of detecting a tape attached to a banknote using a plurality of polarizing filters. Fig.
Figs. 16 and 17 are views showing an embodiment of a structure in which a plurality of polarizing filters are arranged. Fig.
Figs. 18 and 19 are views showing another embodiment of a structure in which a plurality of polarizing filters are arranged. Fig.
20 is a graph for explaining another embodiment of a method for determining whether or not a tape is attached according to intensity of a polarized light detected by a light receiving unit.
21 is a graph for explaining another embodiment of a method for determining whether or not a tape is attached according to intensity of a polarized light detected by a light receiving unit.
22 is a view showing a third embodiment of the configuration of the bill processing apparatus according to the present invention.

The following merely illustrates the principles of the invention. Thus, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, intended only for the purpose of enabling understanding of the concepts of the present invention, and are not intended to be limiting in any way to the specifically listed embodiments and conditions .

It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. It is also to be understood that such equivalents include all elements contemplated to perform the same function irrespective of the currently known equivalents as well as the equivalents to be developed in the future, i.e., the structure.

Thus, it should be understood that all flow diagrams, state transitions, pseudo code, etc. are representative of various processes that may be substantially represented on a computer-readable medium and executed by a computer or processor, whether the computer or processor is explicitly shown .

The functions of the various elements shown in the figures, including the functional blocks depicted in the processor or similar concept, may be provided by use of dedicated hardware as well as hardware capable of executing software in connection with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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

 1 shows an embodiment of a configuration of a banknote processing apparatus according to the present invention and shows the inside of a device capable of performing counting, counterfeit detection and damaged banknote detection for one or more banknotes to be inputted .

Referring to FIG. 1, the banknote handling apparatus 10 includes rollers 110 for sequentially feeding a plurality of banknotes stacked on the input unit 140 and feeding the banknotes one by one, And may include transfer sensors 120.

For example, the rollers 110 may include a main-feed roller for feeding bills, a kicker roller for separating the stacked bills into sheets and delivering the bills to the main-feed roller, a push roller, a reverse roller for pushing the upper sheet in the opposite direction and separating the sheets into sheets when two or more sheets of paper money are fed together, and the like

The conveyance sensors 120 include an input sensor for detecting whether or not the paper money to be separated and fed is separated and a jam sensor for detecting a jam of paper money in the middle of the conveyance path T .

The banknote processing apparatus 10 includes a recognition unit (not shown) for sequentially recognizing the inputted bills and outputting a recognition result corresponding to at least one of the denomination of the bills, whether the bills are counterfeit, and whether the bills are damaged or not.

The recognition unit is located adjacent to the conveyance path T of the bill to be conveyed to detect recognition of the denomination of the bill, detect whether it is falsified, detect whether the bill is damaged or not and detect recognition bills 130 ). ≪ / RTI >

The recognition sensors 130 may include a CIS image sensor to acquire an image of each banknote to be conveyed and to extract banknote characteristic information in the obtained image to recognize the denomination.

In addition, the recognition sensors 130 may include an infrared (IR) sensor, a UV sensor, a magnetic (MG) sensor, a CIS sensor, or the like for detecting various counterfeit elements formed on the bill.

In addition, the banknote handling apparatus 10 includes an anti-stokes sensor for detecting Anti-Stoke's luminescent material formed in a specific region of a banknote for detecting counterfeit money.

The anti-stokes luminescent material is a luminescent material capable of emitting light in a visible light range when it is excited by infrared rays (IR), wherein the rotation line of Raman spectrum is referred to as a Raman line and a line appearing on a longer wavelength side than the incident light is referred to as a stoke line The line appearing on the wavelength side is called an anti-Stokes line.

The Raman spectrum is a spectrum of scattered light due to the Raman effect, and the spectrum in the case where the energy difference between the vibration levels of the ground state of the molecules occurs between the incident photon and the molecule is referred to as a vibrational Raman spectrum.

In this case, since the transition between the rotation levels is also related, it is also referred to as a Raman rotation vibration band, and the change in the quantum number of vibrations is strongly exhibited. On the other hand, the spectrum when the energy difference between the rotation levels within the lowest vibration level of the floor condition occurs is called the rotating Raman spectrum.

On the other hand, the normal bills determined to be non-counterfeit by the above-described structure are stacked on the stacker 150, and the abnormal bills, such as the counterfeit or the denomination can not be identified, 160, respectively.

The recognition unit included in the banknote processing apparatus 10 can confirm whether or not a tape is attached to the banknote being transported. To this end, the recognition unit may include a sensor module for detecting a tape.

According to an embodiment of the present invention, the sensor module for tape detection includes a light emitting portion for emitting light to at least a part of a banknote, a light receiving portion for detecting light reflected from the banknote, And a polarizing filter arranged to pass specific polarization components.

The tape detection sensor module can detect a tape attached to the banknote based on the intensity of the polarized light detected by the light receiving portion using the polarizing filter.

As a result of the detection using the tape detection sensor module, if the tape is attached to the banknote and it is determined that the banknote is a damaged banknote, the banknote can be discharged to the reject pocket 160.

In addition, whether or not the banknote is damaged can be detected by detecting a torn or perforated banknote using a CIS image sensor, detecting a jippe in water by using an ultraviolet (UV) sensor, or graffiti using an infrared (IR) sensor The bill can be identified by detecting the bill.

The configuration of the banknote handling apparatus 10 described with reference to FIG. 1 is according to an embodiment of the present invention, and the present invention is not limited to this, and various configurations may be possible as needed.

For example, as shown in FIG. 2, the charging unit 141 and the discharging units 161, 162, and 163 of the banknote processing apparatus 10 may be configured as pockets inside the apparatus.

In this case, the banknotes stacked on the input unit 141 are recognized as denomination, counterfeit, or damaged by the recognition unit, and are classified into a plurality of stacking pockets 161, 162, and 163 according to the recognition result, .

FIG. 3 is a block diagram illustrating the configuration of a tape detecting apparatus according to an embodiment of the present invention. The tape detecting apparatus 300 shown in FIG. 3 includes a light emitting unit 310, a polarizing filter 320, a light receiving unit 330, And a detection unit 340.

FIG. 4 is a flowchart illustrating a bill tape detection method according to an embodiment of the present invention. Referring to FIGS. 3 and 4, an apparatus and method for detecting a tape according to an embodiment of the present invention will be described with reference to FIGS. do.

Referring to FIGS. 3 and 4, the light emitting unit 310 emits light to at least a part of the banknote using an LED (Light Emitting Diode) that emits light of a predetermined wavelength (S400).

On the other hand, the light-receiving unit 330 is formed of a photo diode array, and is capable of detecting light emitted from the LED array provided in the light-emitting unit 310 and incident on the bill and then reflected therefrom.

More specifically, the light receiving unit 330 is for detecting polarized light reflected from the banknote by being irradiated to a part of the banknote from the light emitting unit 310. For this purpose, the optical path between the light emitting unit 310 and the light receiving unit 320 A polarizing filter 320 is disposed.

The polarizing filter 320 is a filter that passes only a specific polarized light component of incident light and passes only a specific polarized light component emitted from the light emitting unit 310 or incident on the light receiving unit 320, Polarized light can be detected.

Using the polarizing filter 320 arranged as described above, the polarized light reflected from the bill is detected by the light receiving unit 330 (step S410).

Thereafter, the tape detecting unit 340 determines whether or not the tape is attached to a part of the paper money to which the light is irradiated, based on the intensity of the polarized light detected by the light receiving unit 320 (step S420).

For example, the tape detecting unit 340 determines whether or not the tape is attached according to the result of comparing the intensity of the polarized light reflected from a part of the paper currency to which the tape is not attached and the intensity of the polarized light reflected from a part of the paper currency to which the tape is attached can do.

Hereinafter, a specific configuration of a tape detecting apparatus according to an embodiment of the present invention and a tape detecting method using the same will be described in detail with reference to FIG. 5 to FIG.

5 and 6 illustrate embodiments of a method of detecting a tape attached to a banknote using a light emitting portion, a light receiving portion, and a polarizing filter.

5, the light emitting unit 310, the polarizing filter 320, and the light receiving unit 330 are disposed above the banknote A so that light emitted from the LED of the light emitting unit 310 is incident at a predetermined incident angle? And the irradiated light may be reflected by the corresponding portion and then may be incident on the light receiving portion 330 through the polarizing filter 320. In this case,

5, the light emitted from the light emitting portion 310 and reflected by the banknote A is reflected by the polarizing filter 320 disposed on the front face of the light receiving portion 330, And the light receiving section 330 can detect the polarized light reflected by the banknote A, as shown in Fig.

Here, since the optical characteristics of the paper money A and the tape T are different from each other, the polarity of the polarized light reflected from the portion of the paper money A where the tape is not attached and the tape is reflected by the light receiving portion 330 The strengths can be different from each other.

Therefore, the tape detecting apparatus 300 according to an embodiment of the present invention can determine whether or not a tape is attached to the banknote A based on the intensity of the polarized light detected by the light-receiving unit 330. [

As described above, in order to detect a tape adhered to the bill according to the intensity of the polarized light, the incident angle [theta] of the light emitted by the light emitting portion 310 and irradiated on the bill A is in a direction perpendicular to the surface of the bill A And the polarizing effect can be enhanced by setting the angle of view to be 45 to 65 degrees.

The polarization filter 320 may be an S polarized light filter for passing S polarized light having a direction perpendicular to the incident surface and having a strongest reflected light intensity.

In this case, when the intensity of the polarized light detected by the light receiving unit 330 is equal to or greater than a preset reference value, the tape detecting apparatus 300 can determine that the tape is attached to the corresponding portion of the paper currency A.

6, a polarizing filter 320 is disposed on a front surface of the light emitting unit 310 to detect a specific polarized light component (for example, light emitted from one or more LEDs of the light emitting unit 310) S polarized light) may be irradiated onto a part of the area of the banknote A. [

In this case, light of a specific polarization component (for example, S polarized light) passed by the polarizing filter 320 is reflected by the tape adhered to the banknote A or the banknote A and is then incident on the light-receiving portion 330 , The light receiving section 330 can detect the polarized light emitted from the banknote A.

7 and 8 are diagrams illustrating a structure in which a sensor module including a light emitting unit 310, a polarizing filter 320, and a light receiving unit 330 is disposed in a bill processing apparatus 10 according to an embodiment of the present invention. Examples are shown.

7, the banknote A is conveyed in a specific direction by a conveying portion of the banknote handling apparatus 10 as described with reference to FIGS. 1 and 2, and is arranged above the conveyed banknote A, And a light receiving unit 330 composed of a photodiode array may be disposed.

A polarizing filter 320 is disposed on the front surface of the light receiving unit 330 formed of a photodiode array so that the polarized light reflected from the bill A can be detected by the photodiode array of the light receiving unit 330.

As described above, when the polarization filter 320 passes the S polarized light component, the intensity of the polarized light reflected by the portion of the banknote A where no tape is adhered and detected by the light-receiving portion 330 is reflected by the tape of the banknote A And may be smaller than the intensity of the polarized light reflected by the attached portion and detected by the light receiving unit 330.

The tape detecting section 340 provided in the banknote handling apparatus 10 can detect the intensity of the polarized light detected by the light receiving section 330 with a predetermined reference value (for example, The intensity of the S polarized light is set to be larger than the intensity of the S polarized light), it can be judged that the tape is attached to the corresponding portion of the banknote A.

8, a light emitting portion 310 composed of an LED array and a light receiving portion 330 composed of a photodiode array are arranged above the banknote A conveyed in a specific direction by a conveying portion of the banknote processing apparatus 10 And a polarizing filter 320 for passing an S polarized light component may be disposed on the entire surface of the light emitting portion 310 composed of the LED array.

7 and 8, the LED array of the light emitting unit 310 and the photodiode array of the light receiving unit 330 may be arranged in a direction intersecting the moving direction of the banknote A, The photodiode array of the LED array of the light emitting unit 310 and the photodiode array of the light receiving unit 330 may be arranged in the long axis direction of the banknote A when the banknote A moves in the direction crossing the long axis.

According to another embodiment of the present invention, a plurality of sensor modules including the light emitting unit 310, the polarizing filter 320 and the light receiving unit 330 may be provided in the banknote handling apparatus 10 or the tape detecting apparatus 300 have.

In this case, the plurality of sensor modules can be arranged in the long axis direction of the banknote A.

9 and 10 are views for explaining embodiments of a method of detecting a tape attached to a bill using a plurality of sensor modules.

9, the plurality of sensor modules S1, S2, and S3 include light emitting portions 310, 311 and 312, polarizing filters 320, 321 and 322, and light receiving portions 330, 331 and 332 .

For example, the plurality of sensor modules S1, S2, and S3 are arranged side by side in the direction perpendicular to the conveying direction of the banknote A, and light is irradiated to a part of the banknote A corresponding to each position By detecting the intensity of the polarized light reflected therefrom, it is possible to judge whether or not the tape is attached to the portions of the paper money A to be conveyed.

9, the polarizing filters 320, 321 and 322 are disposed on the front surfaces of the light receiving units 330, 331 and 332, respectively. However, as shown in FIG. 10, May be disposed on the front surfaces of the light emitting units 310, 311, and 312, respectively.

Figs. 11 and 12 are shown to illustrate embodiments of a method for detecting a tape attached to the lower side of a bill.

11, a tape is attached to the lower surface of the banknote A, so that a gap between the conveying portion T of the banknote handling apparatus 10 for conveying the banknote A in a specific direction and the banknote A The tape may be positioned on the tape.

11, a sensor including a light emitting portion 310, a polarizing filter 320, and a light receiving portion 330, as shown in Fig. 11, for detecting the tape attached to the lower surface as well as the upper surface of the banknote A, One or more modules may be disposed on both sides of the banknote A, respectively.

In the case where the light emitting portion 310 is formed of an LED array emitting near infrared rays, the near infrared rays emitted from the light emitting portion 310 to the paper money A can transmit much paper money A The tape attached to the lower surface of the banknote A can be detected using only the sensor module disposed above the banknote A as shown in FIG.

13 is a graph for explaining an embodiment of a method for determining whether or not a tape is attached according to intensity of a polarized light detected by a photodiode array of a light receiving unit 330. [

13 (a) shows the intensity of the polarized light reflected by the tape-attached portion of the banknote A and detected by the photodiode array of the light-receiving portion 330, and FIG. 13 (b) The graph shows the intensity of the polarized light reflected by the portion of the paper money A where no tape is attached and detected by the photodiode array of the light receiving portion 330.

As described above, when the polarizing filter 320 for passing the S polarized light component is disposed on the entire surface of the light receiving unit 330 or the light emitting unit 310, the intensity of the S polarized light reflected from the tape attached to the banknote A is The intensity of S-polarized light reflected from the portion where the tape is not adhered may be larger than that of S-polarized light.

Accordingly, by comparing the intensity of the polarized light detected by the photodiode array of the light receiving unit 330 with a predetermined reference value Ref, the intensity of the polarized light detected by the specific photodiode during a specific time period is larger than the reference value Ref. , It can be judged that the tape is attached at the position corresponding thereto.

For example, a time period during which polarized light having intensity greater than the reference value (Ref.) Is detected may indicate the position of the tape with respect to the conveying direction of the banknote A, The position of the photodiode at which the polarized light is detected can indicate the position of the tape with respect to the direction perpendicular to the conveying direction of the banknote A.

According to another embodiment of the present invention, the polarizing filter 320 may comprise two or more polarizing filters that pass different polarization components.

For example, two or more polarizing filters passing different polarized components may be disposed on the front surface of the light emitting portion 310 or the light receiving portion 330 to determine whether or not the tape is attached based on the intensity of the polarized light passed through the light emitting portion 310 or the light receiving portion 330, The tape attached to the bill or the like can be detected more accurately.

Figs. 14 and 15 are views for explaining embodiments of a method of detecting a tape attached to a banknote using a plurality of polarizing filters. Fig.

Referring to FIG. 14, a first polarizing filter 321 and a second polarizing filter 322 for passing different polarized components can be disposed on the front surface of the light receiving unit 330.

According to an embodiment of the present invention, the first polarizing filter 321 is an S polarizing filter for passing S polarized light and the second polarizing filter 322 is a P polarized light passing Or a P-polarized filter.

The photodiode array of the light receiving section 330 can simultaneously detect the S polarized light having passed through the first polarizing filter 321 which is an S polarizing filter and the P polarized light having passed through the second polarizing filter 321 which is a P polarizing filter.

As described above, the first polarizing filter 321, which is an S polarizing filter, has a direction perpendicular to the incident surface and transmits the polarized light component having the strongest reflected light intensity. The second polarizing filter 322, which is a P polarizing filter, It is possible to pass the polarized light component having the weakest reflected light intensity in a parallel direction.

In this case, the tape detecting section 340 determines whether or not the tape is attached to a part of the banknote A to which the light is irradiated from the light emitting section 310, using the intensity of the different polarized light components simultaneously detected by the light receiving section 330 Can be determined.

Referring to FIG. 15, the first polarizing filter 321 and the second polarizing filter 322, which pass different polarized components as described above, may be disposed on the front surface of the light emitting unit 310.

For example, the light emitted from the LED array of the light emitting unit 310 passes through the first polarizing filter 321, which is an S polarizing filter, and is irradiated with the S polarized light to the banknote A, Polarized filter 321 and can be irradiated on the banknote A with P polarized light.

16 and 17 are shown to illustrate an embodiment of a structure in which a plurality of polarizing filters are arranged.

16, the photodiode array of the light receiving unit 330 is divided into two or more areas 330a and 330b with reference to a direction (second direction) intersecting the conveyance direction (first direction) of the banknote A And a first polarizing filter 321 as an S polarizing filter and a second polarizing filter 322 as a P polarizing filter are disposed at positions overlapping with the divided areas 330b and 330a of the light receiving unit 330, May be disposed.

On the other hand, as shown in FIG. 17, the LED array of the light emitting portion 310 is divided into two or more regions 310a (second direction) based on the direction in which the LED array of the banknote A crosses the first direction A first polarizing filter 321 as an S polarizing filter and a second polarizing filter 321 as a P polarizing filter are disposed at positions overlapping with the divided regions 310b and 310a of the light emitting unit 310, A two-polarization filter 322 can be disposed.

FIGS. 18 and 19 are shown to illustrate another embodiment of a structure in which a plurality of polarizing filters are disposed.

18, the photodiode array of the light receiving unit 330 can be divided into two or more regions with respect to the conveying direction (first direction) of the banknote A, and the divided regions of the light receiving unit 330 A first polarizing filter 321, which is an S polarizing filter, and a second polarizing filter 322, which is a P polarizing filter, may be alternately arranged at positions overlapping with each other.

19, the LED array of the light emitting portion 310 may be divided into two or more regions with respect to the conveyance direction (first direction) of the banknote A, and the light emitting portion 310 The first polarizing filter 321, which is an S polarizing filter, and the second polarizing filter 322, which is a P polarizing filter, may be alternately arranged at positions overlapping with the respective divided regions.

A first polarizing filter 321 as an S polarizing filter and a second polarizing filter 322 as a P polarizing filter are disposed on the entire surface of the light receiving unit 330 or the light emitting unit 310 as described with reference to Figs. 14 to 19 The tape detecting unit 340 detects the intensity of the first polarized light (for example, S polarized light) detected by the light receiving unit 330 through the first polarized light filter 321 and the intensity of the first polarized light It is possible to detect the tape based on at least one of the intensity of the second polarized light (for example, P polarized light) detected by the light receiving portion 330.

For example, the tape detector 340 may determine whether the first condition for the intensity of the first polarized light is greater than or equal to the first reference value and whether the intensity of the second polarized light is less than the second reference value It is determined whether or not the second condition is satisfied. If it is determined that the first and second conditions are all satisfied, it can be determined that the tape is attached to a part of the bill.

On the other hand, if the first condition is not satisfied, the tape detecting section 340 determines that the tape is not attached to a part of the paper money A irradiated with the light, and the first condition of the first and second conditions It can be judged that a metallic reflection material other than the tape exists in the corresponding portion.

20 is a view for explaining another embodiment of a method for judging whether or not the tape is attached according to the intensity of the polarized light detected by the light receiving unit 330. [

20A shows the intensity of the polarized light reflected by the tape-attached portion of the banknote A and detected by the photodiode array of the light receiving unit 330. The first polarized light filter 321, (S_value) of the S polarized light detected by the light receiving unit 330 and the intensity (P_value) of the P polarized light passing through the second polarizing filter 322 and detected by the light receiving unit 330 together.

20A, the intensity (S_value) of the S polarized light reflected by the tape and detected by the light receiving section 330 is larger than a preset reference value Ref., And the intensity P_value of the P polarized light is May be smaller than the reference value (Ref.).

20B shows the intensity (S_value) of S polarized light detected by the photodiode array of the light receiving unit 330 and the intensity (S_value) of the P polarized light (P_value).

20 (b), the intensity (S_value) of the S polarized light and the intensity (P_value) of the P polarized light reflected by the paper money A without the tape attached thereto and detected by the light receiving section 330 are both the reference value (Ref.).

The graph shown in FIG. 20 (c) shows the intensity of S polarized light detected by the photodiode array of the light receiving portion 330 after being reflected at the portion where the non-polarized reflection metallic material exists in the banknote A S_value) and the intensity of P polarization (P_value).

20 (c), the intensity (S_value) of the S polarized light and the intensity (P_value) of the P polarized light reflected by the portion of the paper money A in which the metallic material is present and detected by the light receiving portion 330 are both May be larger than the reference value (Ref.).

As described above, the intensity (S_value) of the S polarized light and the intensity (P_value) of the P polarized light detected by the photodiode array of the light receiving portion 330 are set to be, respectively, according to the difference in the optical properties of the tape, paper currency By comparison with the reference value (Ref.), It is possible to detect the tape and the metallic material attached to the banknote A.

For example, the tape detector 340 first checks whether the intensity (S_value) of the S polarized light detected by the photodiode array of the light receiving unit 330 is equal to or greater than the reference value Ref. Otherwise, It can be judged that the tape or the metallic material does not exist in the corresponding portion of the tape.

When the intensity S_value of the detected S polarized light is equal to or greater than the reference value Ref, the tape detector 340 detects the intensity P_value of the P polarized light detected by the photodiode array of the light receiving unit 330 as a reference value Ref. Or less.

If it is determined that the intensity of the P-polarized light (P_value) is equal to or less than the reference value (Ref.), It can be determined that the tape is attached to the corresponding portion of the banknote A.

On the other hand, if the intensity (P_value) of the P-polarized light is greater than the reference value (Ref.) As a result of the check, it can be determined that metallic material exists in the corresponding portion of the paper currency A.

According to another embodiment of the present invention, the polarization filter 320 may comprise an active polarizing filter that is switched between a first polarization filter state passing different polarization components and a second polarization filter state have.

For example, an active polarized light filter, which is switched between two or more polarizing filter states through which different polarized light components pass according to an applied voltage, is disposed on the entire surface of the light emitting portion 310 or the light receiving portion 330, .

More specifically, the state of the active polarizing filter is switched between a first polarization filter state through which S polarized light passes and a second polarization filter state through which P polarized light passes, The detection device 300 can control the change of the voltage applied to the active polarized light filter.

The tape detecting unit 340 detects the intensity of the first polarized light (for example, S polarized light) detected by the light receiving unit 330 in the first polarized light filter state and the intensity of the first polarized light It is possible to judge whether or not the tape is attached to a part of the banknote A to which light is irradiated based on at least one of the detected intensity of the second polarized light (for example, P polarized light).

FIG. 21 is a view for explaining another embodiment of a method for determining whether or not a tape is attached according to the intensity of the polarized light detected by the light receiving unit 330. FIG.

21A shows the intensity of the polarized light reflected by the tape-attached portion of the banknote A and detected by the photodiode array of the light receiving unit 330. The graph of FIG. (S_value) of the S polarized light detected by the light receiving unit 330 through the polarized light filter and the intensity (P_value) of the P polarized light that is detected by the light receiving unit 330 through the active polarized filter in the second polarized filter state will be.

As shown in FIG. 21 (a), as the active polarization filter is periodically switched between the first polarization filter state and the second polarization filter state, the S polarization and the P polarization Can be detected alternately.

On the other hand, the intensity (S_value) of the S polarized light reflected by the tape and detected by the light receiving unit 330 is larger than a predetermined reference value Ref., And the intensity P_value of the P polarized light may be smaller than the reference value Ref.

The graph shown in FIG. 21B shows the intensity (S_value) of the S polarized light which is alternately detected by the photodiode array of the light receiving unit 330, (P_value) of the P polarization.

The intensity (S_value) of the S polarized light and the intensity (P_value) of the P polarized light reflected by the paper money A without the tape attached thereto and detected by the light receiving section 330 are both the reference value (Ref.).

The graph shown in FIG. 21 (c) shows the S polarized light (S polarized light) which is reflected by the metallic material causing non-polarized reflection in the bill A and alternately detected by the photodiode array of the light receiving unit 330 (S_value) and the intensity of P polarization (P_value).

The intensity (S_value) of the S polarized light and the intensity (P_value) of the P polarized light reflected by the portion of the paper money A where the metallic material is present and detected by the light receiving portion 330 are both May be larger than the reference value (Ref.).

The intensity (S_value) of the S polarized light and the intensity (P_value) of the P polarized light alternately detected by the photodiode array of the light receiving portion 330 are changed according to the difference in the optical properties of the tape, paper currency (A) Is compared with the reference value (Ref.), It is possible to detect the tape and the metallic material attached to the banknote A, respectively.

For example, the tape detector 340 first checks whether the intensity (S_value) of the S polarized light detected by the photodiode array of the light receiving unit 330 is equal to or greater than the reference value Ref. Otherwise, It can be judged that the tape or the metallic material does not exist in the corresponding portion of the tape.

When the intensity S_value of the detected S polarized light is equal to or greater than the reference value Ref, the tape detector 340 detects the intensity P_value of the P polarized light detected by the photodiode array of the light receiving unit 330 as a reference value Ref. Or less.

If it is determined that the intensity of the P-polarized light (P_value) is equal to or less than the reference value (Ref.), It can be determined that the tape is attached to the corresponding portion of the banknote A.

On the other hand, if the intensity (P_value) of the P-polarized light is greater than the reference value (Ref.) As a result of the check, it can be determined that metallic material exists in the corresponding portion of the paper currency A.

In the above description, the tape detection method and apparatus according to an embodiment of the present invention are described as an example of detecting a tape attached to a bill in a bill processing apparatus such as a bill counter or a counterfeit detector, but the present invention is not limited thereto The present invention can be applied to various banknote handling apparatuses having a function of detecting a tape attached to a banknote.

FIG. 22 illustrates an embodiment of a configuration of an automatic teller machine according to the present invention. FIG. 22 illustrates a structure of an apparatus capable of receiving deposited banknotes or checks and withdrawing banknotes or checks.

The automatic teller machine 20 is provided with a cash deposit and withdrawal unit for depositing or receiving banknotes for depositing and withdrawing money, a conveyance path for conveying banknotes deposited and deposited through the deposit and withdrawal unit, A temporary storage section for temporarily storing the deposited banknotes after passing through the discrimination section, and one or more storage sections for storing the banknotes deposited from the customer and performing the reflux function by withdrawing the stacked banknotes.

22, the automatic teller machine 20 is provided with a check deposit / withdrawal portion 211 for inserting and discharging checks, and a banknote deposit / withdrawal portion 221 for inserting and discharging banknotes, And the bill transfer path for transferring the banknotes are separately provided so that the deposit and withdrawal apparatus having the storage cassette can be divided into the check exclusive deposit and withdrawal apparatus 210 and the bill exclusive deposit and withdrawal apparatus 220. [

The automatic teller machine 10 according to the present invention can be a device for judging whether or not the banknotes to be deposited or withdrawn are counterfeit.

More specifically, the banknote deposit / withdrawal portion 221 deposits and withdraws bills in a space between the front plate and the push plate, and separates and separates the banknotes from each other by the separation stack portion which performs separation and stacking of the banknotes. A stack may be made for the < / RTI >

The separating stack unit includes a pick-up roller for providing separating pressure for separating the banknotes one by one, a banknote separator disposed at the lower end of the pick-up roller and separated by the pick-up roller, A feed roller for contacting the feed roller with a guide roller for conveying the paper money therebetween, and a stack roller coaxial with the guide roller and having a wing formed on a part of the outer periphery thereof, And the like.

When the customer deposits or withdraws banknotes, the banknote deposit and withdrawal unit 221 having the above-described structure moves the front plate to the lower frame side where the push plate is located, and stacks the deposited banknotes for sheet separation or withdrawal The pickup roller, the feed roller, the guide roller, and the stack roller may be exposed to the lower side of the front plate as the front plate moves toward the separation stack portion.

On the other hand, the automatic teller machine 20 is provided with an ultraviolet (UV) sensor, an infrared (IR) sensor and a magneto-resistive (MR) sensor for discriminating the unique properties of special inks such as ultraviolet ink, infrared ink, A sensor, and a number of discrimination sensors, so that it is possible to discriminate whether a banknote which is input into or discharged from the automatic teller machine 20 is denominated and counterfeit.

For example, when the banknote discriminating part of the automatic teller machine 20 identifies whether a banknote is denominated and counterfeit by using a plurality of sensors, the banknote discriminating part usually includes R, G, B and three infrared rays IR- , IR-B, and IR-C: IR-A, B, and C are infrared rays of a specific wavelength), the bill can be identified by sensing a beam emitted from a light source of six different wavelengths.

The automatic teller machine 20 according to the embodiment of the present invention is provided with a tape detecting device as described with reference to Figs. 3 to 13 to check whether or not a tape is attached to each of the inserted bills have.

The normal bills judged not to have the tape attached thereto are conveyed to and stacked on the banknote storage portion (not shown), and the damaged bills judged to have the tape attached thereto are conveyed again to the banknote deposit / withdrawal portion 221 And can be released.

Although the tape detection method and apparatus according to the embodiment of the present invention have been described above with reference to the case of detecting a tape adhered to a bill, the present invention is not limited thereto, and may be applied to other paper materials having different optical characteristics Or may be used to detect an attached tape or other material.

At least some of the steps of the tape detection method according to the present invention may be stored in a computer-readable recording medium. The computer readable recording medium may be a ROM, a RAM, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like, as well as carrier waves (e.g., transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional programs, codes and code segments for implementing the above method can be easily inferred by programmers of the technical field to which the present invention belongs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (17)

An apparatus for detecting a tape adhered to a bill, comprising:
A light emitting portion for emitting light of a predetermined wavelength so that light is irradiated onto at least a part of the banknote;
A light receiving unit for detecting polarized light emitted from the light emitting unit and reflected from the bill;
An active polarized light filter disposed in an optical path between the light emitting portion and the light receiving portion and being switched between a first polarization filter state and a second polarization filter state; And
And a tape detecting unit for determining whether or not a tape is attached to a part of the bill irradiated with the light based on the intensity of the polarized light detected by the light receiving unit,
And the active polarized light filter passes different polarized light components in the first and second polarized light filter states. The method according to claim 1,
And the state of the active polarized light filter is periodically switched according to a change in the voltage applied to the active polarized light filter. The optical filter according to claim 1, wherein the active polarizing filter
Passing S polarized light in the first polarized filter state and passing P polarized light in the second polarized light filter state. The optical filter according to claim 1, wherein the active polarizing filter
And a specific polarized light component of the light reflected by the bill is passed according to the state of the polarized light filter to be switched. The optical filter according to claim 1, wherein the active polarizing filter
And a specific polarized light component of the light emitted from the light emitting unit is passed according to the state of the polarized light filter to be switched. The apparatus of claim 1, wherein the tape detecting unit
Determining whether or not the tape is attached using at least one of the intensity of the first polarized light detected by the light receiving unit in the first polarized light filter state and the intensity of the second polarized light detected by the light receiving unit in the second polarized light filter state, . 7. The apparatus of claim 6, wherein the tape detector
Determining whether a first condition for the intensity of the first polarized light is greater than or equal to a first reference value and determining whether a second condition for whether the intensity of the second polarized light is less than a second reference value is satisfied, And judges that a tape is attached to a part of the banknote to which the light is irradiated if the first and second conditions are all satisfied. The apparatus as claimed in claim 7, wherein the tape detecting unit
And judges that no tape is attached to a part of the paper money to which the light is irradiated if the first condition is not satisfied. The apparatus as claimed in claim 7, wherein the tape detecting unit
And judges that a metallic material other than the tape is present in a part of the paper money to which the light is irradiated if only the first condition among the first and second conditions is satisfied. A bill processing apparatus comprising the tape detection device according to any one of claims 1 to 9. 11. The method of claim 10,
And a transfer unit for sequentially charging a plurality of banknotes to be fed in the direction of the banknote tape detecting device. A method for detecting a tape attached to a banknote,
So that light is irradiated onto at least a part of the banknote using an LED that emits light of a predetermined wavelength;
Detecting polarized light reflected from the banknote by light emitted from the LED, using an active polarized light filter that is switched between a first polarized light filter state and a second polarized light filter state that pass different polarized light components; And
Based on at least one of the intensity of the first polarized light detected by the light receiving unit in the first polarized light filter state and the intensity of the second polarized light detected by the light receiving unit in the second polarized light filter state, And determining whether or not a tape is attached to a part of the tape. 13. The method of claim 12,
Further comprising changing a voltage applied to the active polarized light filter so as to periodically change the state of the active polarized light filter. 13. The optical pickup of claim 12, wherein the active polarizing filter
Passing S polarized light in the first polarized filter state and passing P polarized light in the second polarized light filter state. 13. The method of claim 12,
Determining whether a first condition for whether the intensity of the first polarized light is equal to or greater than a first reference value is satisfied;
Determining whether a second condition for whether the intensity of the second polarized light is equal to or less than a second reference value is satisfied; And
And judging that a tape is attached to a part of the banknote to which the light is irradiated if all of the first and second conditions are satisfied. 16. The method of claim 15,
And judges that no tape is attached to a part of the paper money to which the light is irradiated if the first condition is not satisfied. 16. The method of claim 15,
Wherein when it is determined that only the first condition among the first and second conditions is satisfied, it is determined that a metallic material other than the tape is present on a part of the paper currency irradiated with the light.

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