KR20140044238A - Apparatus for recognizing bill type using terahertz electromagnetic wave and method thereof - Google Patents

Abstract

The present invention relates to an apparatus for recognizing a note type using a terahertz electromagnetic wave, and a method thereof. The apparatus of the present invention includes a terahertz radiating unit which radiates a terahertz electromagnetic wave to a note; a penetrated wave detecting unit which generates an electrical signal by detecting the terahertz electromagnetic wave penetrating the note; and a control unit which generates a transmission image based on the electrical signal inputted from the penetrated wave detecting unit and determines the type of the note by using the transmission image. The apparatus of present invention is able to easily and accurately determine the type of a note because a clear transmission image in which the front side and rear side of the bill are overlapped can be generated by radiating the terahertz electromagnetic wave having high penetrating power to the note, and is also able to reduce calculation time for determining the note type because the pattern of an interest area is extracted from the transmission image and compared with a master pattern. [Reference numerals] (AA) Start; (BB) End; (S200) Radiate a terahertz electromagnetic wave to a bill; (S210) Receive an electrical signal about a penetrated wave; (S220) Generate a transmission image; (S230) Extract a transmission pattern; (S240) Compare with a master pattern; (S250) Is there a pattern matched with the master pattern?; (S260) Output the result of a note type recognition; (S270) Output an error message

Description

Paper type recognition device and method using terahertz electromagnetic wave {APPARATUS FOR RECOGNIZING BILL TYPE USING TERAHERTZ ELECTROMAGNETIC WAVE AND METHOD THEREOF}

The present invention relates to a device for recognizing a bandage using terahertz electromagnetic waves and a method thereof, and more particularly, to generate a transmissive image of money by irradiating terahertz electromagnetic waves to money, and to determine the kind of money on the basis of the transmitted image. The present invention relates to a winding type recognition device using a terahertz electromagnetic wave and a method thereof.

In general, the bill counter is a device for counting bills, and the conventional bill counter has only a function for simply counting bills, but recently, a bill counter capable of discriminating the authenticity and the class of bills has been proposed.

For example, a method of recognizing a piece of paper by detecting fragmentary features such as the size or color of a paper money, or by scanning an image of a paper money and comparing it with a basic paper money image, suggests a paper type using the similarity between two images. It has been.

However, when recognizing a winding type by the size or color of a banknote or determining a winding type using the front image of the banknote, there is a problem that the accuracy of the similar winding type is poor.

On the other hand, terahertz (THz) electromagnetic waves in the range of 100 [GHz] to 10 [THz] can pass through nonmetals and nonpolar materials, and because the resonance frequencies of a wide variety of molecules are distributed in this region, medical, agricultural, food, It is expected to provide a new concept of analysis technology in a wide variety of fields such as environmental measurement, biotechnology, safety, and advanced material evaluation.

In addition, signals in the terahertz (THz) band are emerging as an essential core technology for realizing a human-centered ubiquitous society because they have little effect on the human body due to very low energy of several [meV] levels.

Related prior arts include Korean Patent Laid-Open Publication No. 2004-0068659 (published on Aug. 2, 2004, title of the invention: a method for detecting two-note bills in a friction type bill counter).

The present invention was devised to improve the above-mentioned problems, and a device for recognizing a scoop using terahertz electromagnetic waves to easily and accurately determine the scoop of a currency using a transmission image of money detected by the terahertz electromagnetic waves and its The purpose is to provide a method.

According to an aspect of the present invention, a device for recognizing a bandage using terahertz electromagnetic waves includes a terahertz irradiation unit for irradiating terahertz electromagnetic waves to money; A transmission wave detector for detecting the terahertz electromagnetic wave passing through the money and generating an electrical signal; And a controller configured to generate a transmission image based on the electrical signal input from the transmission wave detection unit, and to determine the winding type of the money using the transmission image.

The present invention comprises a first optical unit for focusing the terahertz electromagnetic waves irradiated from the terahertz irradiation unit to irradiate with the money; And a second optical unit configured to focus the terahertz electromagnetic wave passing through the money and input the same to the transmitted wave detector.

In the present invention, the control unit is characterized in that the comparison of the transmission pattern with the master pattern to determine the winding type of the currency.

In the present invention, the controller extracts a transmission pattern of the ROI from the transmission image and compares it with the master pattern.

The present invention further includes a reflected wave detector for generating an electrical signal by detecting terahertz electromagnetic waves reflected from the money, wherein the controller generates a reflected image based on the electrical signal input from the reflected wave detector, and the reflected image and And using the transmission image to determine the winding type of the money.

According to another aspect of the present invention, there is provided a method for recognizing a bandwagon using terahertz electromagnetic waves, wherein the controller operates the terahertz irradiator to irradiate the terahertz electromagnetic waves to money; Generating a transmission image by receiving an electrical signal for the terahertz electromagnetic wave passing through the money; And determining the winding type of the money using the transmission image.

In the present invention, the determining of the denomination of money may include extracting a transmission pattern of the ROI from the transmission image; And comparing the transmission pattern with a master pattern to determine a winding type of the money.

The present invention may further include generating an reflected image by receiving an electrical signal for the terahertz electromagnetic wave reflected from the money, and in the determining of the winding type of the money, the controller controls the reflected image and the transmitted image. It is characterized by determining the kind of currency of the currency.

According to the present invention, since the terahertz electromagnetic wave having a high permeability can be irradiated to the money to generate a clear transmission image in which the front and the back of the money overlap, it is possible to easily and accurately determine the denomination of money.

In addition, according to the present invention, since the pattern of the region of interest is extracted from the transmitted image and compared with the master pattern, the calculation time for determining the winding type can be reduced.

1 is a block diagram showing the configuration of a winding type recognition device using terahertz electromagnetic waves according to an embodiment of the present invention.
FIG. 2 is an exemplary view schematically illustrating a configuration of a terahertz irradiator and a detector in a winding species recognition device using terahertz electromagnetic waves according to an embodiment of the present invention.
FIG. 3 is an exemplary view showing in detail the configuration of the terahertz irradiator and the detector in the roll type recognition device using the terahertz electromagnetic wave according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating an operation flow of a winding species recognition method using terahertz electromagnetic waves according to an embodiment of the present invention.
FIG. 5 is an exemplary diagram for describing an operation of extracting a transmission pattern of a region of interest from a transmission image in a winding species recognition method using terahertz electromagnetic waves according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating an operation flow of a winding species recognition method using terahertz electromagnetic waves according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a present invention and a method for recognizing a band paper using terahertz electromagnetic waves according to the present invention will be described in detail. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a block diagram illustrating a configuration of a winding species recognition device using terahertz electromagnetic waves according to an embodiment of the present invention, and FIG. 2 is a terahertz in a winding recognition apparatus using terahertz electromagnetic waves according to an embodiment of the present invention. FIG. 3 is an exemplary view schematically showing the configuration of the irradiation unit and the detection unit, and FIG. 3 is an exemplary view illustrating the configuration of the terahertz irradiation unit and the detection unit in the winding type recognition device using the terahertz electromagnetic wave according to an embodiment of the present invention.

As shown in FIG. 1, a device for recognizing a band using terahertz electromagnetic waves according to an embodiment of the present invention includes a terahertz irradiator 10, a detector 20, a controller 30, a memory 40, and an output unit. And 50.

The terahertz irradiation unit 10 irradiates terahertz electromagnetic waves with money 100 according to a control signal of the controller 30.

The terahertz irradiator 10 may be implemented as a high output vacuum tube such as a backward wave oscillator (BWO), clinotron, gyrotron, FEL (free electron laser), orotron, extended interaction oscillator (EIO).

As shown in FIG. 2, a part of the terahertz electromagnetic waves radiated from the terahertz radiator 10 to the money 100 passes through the money 100, and a part is reflected on the money 100.

The detector 20 detects the terahertz electromagnetic waves reflected from the money 100 and the terahertz electromagnetic waves transmitted through the money 100 and generates an electrical signal, and outputs them to the controller 30.

As shown in FIG. 2, the detection unit 20 includes a reflection wave detection unit 21 for detecting terahertz electromagnetic waves reflected from the money 100 and a transmission wave detection unit 23 for detecting terahertz electromagnetic waves transmitted through the money 100. ) May be included.

On the other hand, as shown in Figure 3, the winding type recognition device using the terahertz electromagnetic waves according to an embodiment of the present invention to focus (terrace) the terahertz electromagnetic waves irradiated from the terahertz irradiation unit 10 to the money (100) The first optical unit 61 to irradiate and the second optical unit 62 for focusing the terahertz electromagnetic wave transmitted through the money 100 and input to the transmission wave detection unit 23.

That is, the terahertz electromagnetic waves irradiated from the terahertz irradiation unit 10 are converted into parallel electromagnetic waves by the first optical unit 61 and irradiated to the money 100, and the terahertz electromagnetic waves transmitted through the money 100 are made of first. 2 may be input to the transmission wave detector 23 by the optical unit 62.

The controller 30 generates a transmission image based on an electrical signal input from the transmission wave detector 23, and compares the generated transmission image with a master pattern stored in the memory unit 40 to determine the type of currency 100. do.

Since the terahertz electromagnetic wave has a high transmittance, most of the terahertz electromagnetic waves are transmitted through the money 100 and input to the transmission wave detector 23, so that the images of the front and the back of the money 100 overlap the transmitted image. In addition, it is possible to obtain a transmission image of high resolution.

In this case, the controller 30 may extract the transmission pattern of the ROI from the transmission image and compare the extracted transmission pattern with the master pattern stored in the memory unit 40 to determine the winding type of the money 100.

As such, only the transmission pattern of the ROI may be extracted and compared with the master pattern, thereby reducing computation time for winding paper recognition.

On the other hand, it is also possible to determine the winding type of the money 100 by using both the reflection image and the transmission image.

That is, the controller 30 may further generate a reflected image based on the electrical signal input from the reflected wave detector 21, and determine the winding type of the money 100 using both the reflected image and the transmitted image.

In this case, the control unit 30 generates a combination image by combining the reflection image and the transmission image, extracts the combination pattern of the ROI from the combination image, and compares it with the master pattern stored in the memory unit 40. You can determine the swelling type.

Similarly, it may be possible to determine the winding type of money 100 using only the reflected image.

That is, the controller 30 may extract the reflection pattern of the ROI from the reflection image, and compare the extracted reflection pattern with the master pattern stored in the memory 40 to determine the winding type of the money 100.

As described above, a detailed process of the controller 30 determining the winding type of the money 100 will be described later with reference to FIGS. 4 to 6.

The memory unit 40 stores a master pattern, which is a criterion for determining the winding type of the money 100. The master pattern may be defined in various ways depending on the object of comparison (eg, a transmission pattern, a combination pattern, or a reflection pattern) or a region of interest.

Since it is impossible to recognize a winding type in which the master pattern is not stored, it is preferable that the master pattern of various winding types be stored in the memory unit 40 as much as possible.

The output unit 50 outputs the roll type recognition result or the error message determined by the control unit 30. Here, the result of the denomination recognition includes information on the denomination of the currency 100, and the error message means a message that is output when the denomination cannot be determined.

The output unit 50 may be provided with a display panel (not shown) to display a result of speech recognition or an error message. The output unit 50 may be provided with a speaker (not shown) to output the result of speech recognition or an error message. You may.

In the present embodiment, the configuration of the terahertz irradiator 10 and the detector 20 is configured in the same manner as in FIGS. 2 and 3, but is not limited thereto. It can be said that it can be configured in a variety of other forms that can detect the reflection image or transmission image of the money (100).

FIG. 4 is a flowchart illustrating an operation flow of a wound wave recognition method using terahertz electromagnetic waves according to an embodiment of the present invention, and FIG. 5 is a transmission image in the wound wave recognition method using terahertz electromagnetic waves according to an embodiment of the present invention. It is an exemplary view for explaining the operation of extracting the transmission pattern of the region of interest from the.

As shown in FIG. 4, the controller 30 operates the terahertz irradiator 10 to irradiate the terahertz electromagnetic waves to the money 100 (S200).

As described above, the terahertz electromagnetic wave transmitted through the money 100 is input to the transmitted wave detector 23.

The control unit 30 receives an electrical signal for the transmitted wave transmitted through the currency from the transmitted wave detection unit 23 (S210).

The controller 30 generates a transmission image using the electrical signal input from the transmission wave detector 23 (S220), and extracts a transmission pattern of the ROI from the transmission image (S230).

Due to the high transmission power of the terahertz electromagnetic waves, the transmission image is overlapped with the image of the front and back of the currency (100).

In addition, the region of interest refers to a region having a high discrimination ability because the characteristic of the denomination is well revealed on the currency 100. That is, the transmission pattern corresponds to an image pattern of a part corresponding to the ROI of the entire area of the transmission image. This region of interest may be variously selected depending on the intention of the designer or the currency applied.

For example, referring to FIG. 5, a case of recognizing 5000 won bills is described. An image of the front and rear surfaces of the 5000 won bills shown in FIGS. 5A and 5B is superimposed on the transmission image. At this time, as shown in (c) of FIG. 5, a region well representing the characteristic of 5000 won in the entire region of the transmission image may be selected as the region of interest P and extracted as a transmission pattern.

For example, in the case of 5000 won bills, an area in which silver coins are detected or a region in which a personification representing 5000 won bills is drawn may be selected as the region of interest P.

After extracting the transmission pattern as described above, the controller 30 compares the transmission pattern with the master pattern stored in the memory 40 (S240).

The control unit 30 checks whether there is a master pattern that matches the transmission pattern as a result of the comparison (S250), and if there is a matching master pattern, controls the output unit 50 and outputs the result of the winding type recognition (S260).

On the other hand, if there is no master pattern that matches the transmission pattern, since it is not possible to determine the winding type, the controller 30 controls the output unit 50 to output an error message (S270).

In this case, the coincidence of the transmission pattern and the master pattern is not limited to the case where all the pixels of the two patterns are physically identical, but may include a case having a difference within an error range that can be determined to coincide.

As described above, according to the present invention using a terahertz electromagnetic wave according to the present invention, it is possible to irradiate terahertz electromagnetic waves with high permeability to the money to generate a clear transmission image in which the front and the back of the money overlap, thereby facilitating the winding of the money. Can be determined accurately.

In addition, since the pattern of the region of interest is extracted and compared with the master pattern, the operation time for determining the winding type may be reduced.

FIG. 6 is a flow chart illustrating an operation flow of a winding species recognition method using terahertz electromagnetic waves according to another embodiment of the present invention, and focuses on differences from the above-described embodiment.

In the above-described embodiment, a case in which a winding pattern is determined by extracting a transmission pattern from a transmission image and comparing it with a master pattern has been described.

However, in some cases, it may be possible to determine the roll type using both the reflection image and the transmission image, and it may be possible to determine the roll type using only the reflection image.

Referring to FIG. 6, another embodiment of the present invention will be described. The controller 30 operates the terahertz irradiator 10 to irradiate terahertz electromagnetic waves to the money 100 (S300), and reflects waves from the detector 20. And receives an electrical signal for the transmitted wave (S310).

Specifically, the control unit 30 receives an electrical signal for the reflected wave reflected from the money 100 from the reflected wave detector 21, and transmits an electrical signal for the transmitted wave transmitted through the money 100 to the transmitted wave detector 23. It is input from.

The controller 30 generates a reflection image and a transmission image using the electrical signal input from the detection unit 20 (S320), and extracts a combination pattern of the ROI from the combination image of the reflection image and the transmission image (S330).

Thereafter, the controller 30 compares the combined pattern with the master pattern stored in the memory 40 (S340).

The controller 30 checks whether there is a master pattern matching the combination pattern as a result of the comparison (S350), and if there is a matching master pattern, the controller 30 controls the output unit 50 to output the result of winding type recognition (S360).

On the other hand, if there is no master pattern that matches the combination pattern, it corresponds to the case where it is impossible to accurately determine the winding type, the controller 30 controls the output unit 50 to output an error message (S370).

As described above, when determining the winding type using both the reflection image and the transmission image, the accuracy of the winding type recognition may be further improved.

Meanwhile, although the present embodiment describes the case in which the currency of the currency is determined by comparing the image generated by irradiating the terahertz electromagnetic wave with the master pattern, the currency of the currency may be determined by other methods besides the pattern comparison. .

For example, it is possible to determine the denomination of money by converting an image generated by irradiating terahertz electromagnetic waves into a vector value in a multidimensional space and comparing the same.

In addition, the denomination of money may be determined using a statistical distribution change (eg, a change in standard deviation) of pixel values constituting the image generated by terahertz electromagnetic waves.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: terahertz investigation
20: detector
21: reflected wave detector
23: transmission wave detection unit
30:
40: memory part
50: Output section
61: first optical unit
62: second optical unit

Claims (8)

A terahertz irradiation unit for irradiating terahertz electromagnetic waves to money;
A transmission wave detector for detecting the terahertz electromagnetic wave passing through the money and generating an electrical signal; And
And a control unit for generating a transmission image based on the electrical signal input from the transmission wave detection unit and determining a winding type of the currency using the transmission image.
The method according to claim 1,
A first optical unit configured to focus the terahertz electromagnetic waves irradiated from the terahertz irradiation unit and irradiate the coin with the money; And
And a second optical unit configured to focus the terahertz electromagnetic waves passing through the money and input the same to the transmitted wave detection unit.
The device of claim 1, wherein the controller determines the kind of the currency of the currency by comparing the transmitted image with a master pattern.
The device of claim 3, wherein the controller extracts a transmission pattern of the ROI from the transmission image and compares the transmission pattern with the master pattern.
The method according to claim 1,
Further comprising a reflected wave detector for detecting the terahertz electromagnetic wave reflected from the money to generate an electrical signal,
And the controller generates a reflection image based on an electrical signal input from the reflection wave detection unit, and determines a winding type of the currency using the reflection image and the transmission image.
Irradiating the terahertz electromagnetic wave to money by operating the terahertz irradiator;
Generating a transmission image by receiving an electrical signal for the terahertz electromagnetic wave passing through the money; And
The species recognition method using terahertz electromagnetic waves comprising the step of determining the species of the currency using the transmission image.
The method of claim 7, wherein the step of determining the currency of the currency
Extracting a transmission pattern of a region of interest from the transmission image; And
Comparing the transmission pattern with the master pattern to determine the winding type of the currency characterized in that it comprises a terahertz electromagnetic wave using a terahertz electromagnetic wave.
The method according to claim 6,
And receiving an electrical signal for terahertz electromagnetic waves reflected from the money to generate a reflected image,
In the step of determining the denomination of the currency, the control unit determines the denomination of the currency by using the reflection image and the transmission image characterized in that the terahertz electromagnetic wave using a terahertz electromagnetic wave.

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