WO2016141801A1 - 图像传感器和纸币处理装置 - Google Patents

图像传感器和纸币处理装置 Download PDF

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Publication number
WO2016141801A1
WO2016141801A1 PCT/CN2016/074137 CN2016074137W WO2016141801A1 WO 2016141801 A1 WO2016141801 A1 WO 2016141801A1 CN 2016074137 W CN2016074137 W CN 2016074137W WO 2016141801 A1 WO2016141801 A1 WO 2016141801A1
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WO
WIPO (PCT)
Prior art keywords
light
image sensor
lens array
banknote
reflected
Prior art date
Application number
PCT/CN2016/074137
Other languages
English (en)
French (fr)
Inventor
焦朋
刘丙庆
张继刚
李林钢
Original Assignee
山东新北洋信息技术股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 山东新北洋信息技术股份有限公司 filed Critical 山东新北洋信息技术股份有限公司
Priority to DE112016001121.0T priority Critical patent/DE112016001121T5/de
Priority to US15/557,150 priority patent/US10410454B2/en
Publication of WO2016141801A1 publication Critical patent/WO2016141801A1/zh

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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D11/00—Devices accepting coins; Devices accepting, dispensing, sorting or counting valuable papers
    • G07D11/10—Mechanical details
    • G07D11/16—Handling of valuable papers
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/17—Apparatus characterised by positioning means or by means responsive to positioning
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/181—Testing mechanical properties or condition, e.g. wear or tear
    • G07D7/189—Detecting attached objects, e.g. tapes or clips
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/205—Matching spectral properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up

Definitions

  • the present invention relates to an image sensor and a banknote processing apparatus.
  • a financial institution such as a bank requires a banknote processing device such as a coin finder or a sorting machine to detect whether or not a scotch tape is attached to the surface of the banknote, thereby preventing the criminals from using a scotch tape to affix a portion of the genuine coin and the counterfeit coin together to falsify the banknote.
  • the prior art generally uses a banknote thickness detecting device to detect whether or not a tape is attached to the surface of the banknote.
  • the banknote thickness detecting device includes a reference roller 1', a plurality of detecting assemblies, and a support shaft 3'.
  • the reference roller 1' extends in the width direction of the banknote, and the length is adapted to the width of the banknote.
  • the support shaft 3' and the reference roller 1' are disposed to be spaced apart from each other and parallel to each other.
  • a plurality of detecting assemblies are arranged along the support shaft 3', each detecting assembly comprising a bracket 4' sleeved with the support shaft 3', a thickness measuring roller 2' disposed on the bracket 4', for biasing the bracket 4'
  • the detecting roller 2' is always pressed against the elastic member 5' of the reference roller 1', and the detecting member 6' provided on the holder 3' and the sensor 7' provided on the fixed frame, wherein the sensor 7' and the detecting member 6 'Cooperate or separate under different conditions.
  • the height at which the banknote lifts the detecting roller 2' is the thickness of the banknote, at which time the sensor 7' and the detecting member 6' The distance between them is the first distance, and the sensor 7' outputs a first detection signal.
  • the height at which the banknote raises the detecting roller 2' is the thickness of the banknote and the tape, and the sensor 7' and the detecting member at this time
  • the distance between 6' is the second distance, and the sensor 7' outputs a second detection signal, and based on the detection signal of the sensor 7', it can be judged whether the surface of the banknote is affixed with a tape.
  • the device for detecting whether or not the surface of the banknote is affixed with a tape has a large number of parts and a large space, it is not advantageous for improving assembly efficiency and is not advantageous for miniaturization of the device.
  • an embodiment of the present invention provides an image sensor including a first photosensitive member and a first light source assembly for illuminating the original, and a first light concentrating the reflected light of the original to the first photosensitive member.
  • the light incident surface of the first lens array is located on a propagation path of the light emitted by the first light source assembly to illuminate the original light to generate specular reflection.
  • the optical axis of the first lens array is disposed in parallel with the reflected ray of the light incident surface of the first lens array that is generated by the specular reflection generated by the light emitted from the first light source assembly.
  • the image sensor described above may further include a second lens array that converges light transmitted through the original to the first photosensitive member.
  • the first light source assembly may include a light guiding member, and the light guiding member includes a first light emitting surface and a second light emitting surface disposed at an angle, and the light emitted from the light incident surface of the first lens array on the first light emitting surface is irradiated on the original Produces a specular reflection of the reflected light on the propagation path.
  • a banknote processing apparatus comprising a first image sensor for acquiring a first side image of a banknote, the first image sensor being an image sensor according to the above description.
  • the banknote processing apparatus may further include a second image sensor for acquiring a second side image of the banknote, the second image sensor including a second photosensitive component, a second light source assembly for providing light to the banknote, and a light reflecting the banknote Converging to a second lens array of the second photosensitive member.
  • the second image sensor described above may further include a third lens array that condenses light of the transmissive banknotes to the second photosensitive member.
  • the first image sensor may further include a third light source assembly for illuminating the banknotes with light, and the light incident surface of the third lens array is located on a propagation path of the transmitted light generated by the light emitted from the light emitting surface of the third light source assembly to illuminate the banknote. .
  • the first light source assembly may include a light guiding member, and the light guiding member includes a first light emitting surface and a second light emitting surface disposed at an angle, and the light incident surface of the first lens array is located on the first light emitting surface and is irradiated on the paper currency.
  • the light incident surface of the third lens array is located on a propagation path of the transmitted light generated by the light emitted from the second light exiting surface to illuminate the banknote.
  • the banknote processing apparatus may further include a first pressure roller abutting against the first image sensor, and a brush layer is disposed on an outer circumference of the first pressure roller.
  • the light incident surface of the lens array of the image sensor provided by the embodiment of the present invention is located on a propagation path of the reflected light generated by the specular reflection of the light emitted by the light source component on the original, and the incident light is reflected on the position of the adhesive tape of the original and is reflected to Since the gradation value of the image generated by the lens array differs from the gradation value of the image generated by the lens array after being irradiated to the position of the uncoated tape of the original document, it is possible to determine whether or not the tape is attached to the surface of the original document.
  • the optical axis of the lens array is arranged to be parallel to the reflected light of the incident light that is specularly reflected, so that the difference in the gray value of the image generated by the reflection to the lens array after the incident light is irradiated on the tape is greater, so that the detection result is more accurate.
  • the banknote processing device uses a pressure roller with a brush layer to flatten the surface of the banknote of the banknote on the light-transmissive plate of the image sensor, so that the surface of the coin is flat and the reflective effect of the tape on the surface of the coin is obtained. Enhanced, the depth of field fluctuation range is reduced, and a lens array is used to concentrate the light onto the photosensitive component to improve the sensitivity of the photosensitive element to the reflective tape.
  • the banknote processing apparatus determines whether the surface of the banknote is affixed with tape according to different gradation values of the image generated by the image sensor.
  • the number of parts is small, the structure is compact, and the space is small. Even if the assembly efficiency is improved, the equipment is miniaturized.
  • FIG. 1 is a schematic structural view of a banknote thickness detecting device in the prior art
  • FIG. 2 is a schematic structural view of a banknote processing apparatus according to an embodiment of the present invention.
  • Figure 3 is a cross-sectional view showing the structure of an image sensor in accordance with one embodiment of the present invention.
  • Figure 4 is a cross-sectional view showing the structure of a first detecting mechanism of the banknote processing apparatus according to an embodiment of the present invention
  • FIG. 5 is a schematic view showing an angle of incident light and reflected light when an image sensor is mated with an original according to an embodiment of the present invention
  • FIG. 6 is a schematic view showing an angle of incident light and reflected light when an image sensor is mated with an adhesive tape according to an embodiment of the present invention
  • FIG. 7 is a block diagram showing an image acquisition mechanism of a banknote processing apparatus according to another embodiment of the present invention.
  • Fig. 8 is a view showing the configuration of an image pickup mechanism of a banknote processing apparatus according to still another embodiment of the present invention.
  • Magnetic information acquisition mechanism 1. First frame;
  • the banknote processing apparatus is a banknote sorting machine.
  • the banknote sorting machine is provided with a coin inlet S0, a coin withdrawal port S3, and at least one cash dispensing port that communicate with the outside.
  • the banknote sorting machine includes a main passage P, at least one auxiliary passage, a paper-feeding mechanism 100, a paper feeding mechanism 200, a bill information acquiring mechanism 300, a conveying mechanism, a reversing mechanism, and a driving mechanism (not shown).
  • the deposit port S0 is located at the beginning end of the main passage P, and the deposit slot S0 is used for stacking the banknotes to be processed;
  • the paper-carrying mechanism 100 is disposed at the deposit port S0 for limiting the bills stacked at the deposit port S0 The position in the width direction of the banknote;
  • the paper feeding mechanism 200 is for feeding the banknotes stacked at the money inlet S0 one by one to the banknote information acquiring mechanism 300.
  • Each of the cash withdrawal ports communicates with the main passage P through an auxiliary passage for accommodating the banknotes identified as normal;
  • the coin withdrawal port S3 is located at the end of the main passage P for accommodating the banknotes identified as abnormal, such as counterfeit coins, The coin, the tape splicing coin, etc.;
  • the conveying mechanism is used to drive the banknote to move along the main channel P or the auxiliary channel.
  • the conveying mechanism includes a plurality of conveying roller sets 6 and a plurality of impellers 40, wherein a plurality of conveying roller sets 6 are disposed on the main passage P and the respective auxiliary passages for driving the movement of the banknotes in the main passage P or the auxiliary passages.
  • the number of the impellers 40 of the conveying mechanism is equal to the total number of the withdrawal opening and the withdrawal slot S3, wherein an impeller 40 is disposed between each of the withdrawal outlets and the corresponding auxiliary passage for the banknotes in the auxiliary passage
  • the sheet is fed into the bill-out opening one by one, and an impeller 40 is disposed between the coin-returning port S3 and the main passage P for sending the banknotes in the main channel P to the coin-returning banknote Inside the mouth S3.
  • the banknote sorting machine includes a coin insertion slot S0, two withdrawal ports (ie, a first withdrawal port S1 and a second withdrawal port S2), and two auxiliary channels (ie, the first auxiliary passage P1 and the second The auxiliary channel P2) and the coin withdrawal port S3,
  • the conveying mechanism comprises three impellers 40, wherein the first withdrawal port S1 communicates with the main channel P through the first auxiliary channel P1 for accommodating the first type of banknote identified as normal
  • the renminbi denomination of the renminbi the second withdrawal port S2 communicates with the main passage P through the second auxiliary passage P2 for accommodating the second type of banknote identified as normal, such as the renminbi denomination of RMB;
  • the three impellers 40 are respectively disposed between the first auxiliary passage P1 and the first withdrawal opening S1, between the second auxiliary passage P2 and the second withdrawal opening S2, and between the main passage P and the withdrawal slot S3;
  • the reversing mechanism includes a first reversing member 51,
  • the first reversing member 51 is disposed at the intersection of the main passage P and the first auxiliary passage P1
  • the second reversing member 52 is disposed at the intersection of the main passage P and the second auxiliary passage P2.
  • the first drive member and the second drive member may be cams or electromagnets or the like.
  • the first driving member is coupled to the first diverting member 51, and the first reversing member 51 is movable to the first position or the second position by the driving of the first driving member.
  • the main passage P communicates with the first auxiliary passage P1, and the banknotes located in the main passage P are sent to the first auxiliary passage P1 through the guiding of the first reversing member 51;
  • the first driving member drives the first reversing member 51 to move to the second position, the passage between the main passage P and the first auxiliary passage P1 is broken, and the bill can only continue to move downstream along the main passage P.
  • the second driving member is coupled to the second reversing member 52.
  • the second reversing member 52 is movable to the first position or the second position under the driving of the second driving member, wherein the second reversing member 52 is located at the second position In one position, the main passage P communicates with the second auxiliary passage P2, and the banknotes located in the main passage P are sent to the second auxiliary passage P2 by the guiding of the second reversing member 52; when the second driving member drives the second exchange
  • the member 52 is moved to the second position, the passage between the main passage P and the second auxiliary passage P2 is disconnected, the main passage P is communicated with the coin withdrawal port S3, and the banknotes in the main passage P are sent to the coin withdrawal port S3.
  • the banknote information acquisition mechanism 300 is disposed on the main channel P, and includes an image acquisition mechanism 310 and a magnetic information acquisition mechanism 320.
  • the image acquisition mechanism 310 is configured to acquire image information of the surface of the banknote, and the image acquisition mechanism 310 includes a first image sensor 311 and a first pressure roller 312 disposed tangentially on both sides of the main channel P.
  • the magnetic information acquiring mechanism 320 is configured to acquire magnetic information on the banknotes, and the magnetic information acquiring mechanism 320 includes a magnetic head 321 and a second pressing roller 322 disposed opposite to each other on the main channel P, when the banknotes are 321 and the second pressure by the magnetic heads When the rollers 322 pass between each other, the magnetic head 321 reads the magnetic information of the surface of the banknote.
  • the controller of the banknote sorting machine determines whether or not the tape is pasted on the surface of the banknote based on the image information and the magnetic information acquired by the image capturing means 310 and the magnetic information acquiring means 320, and the authenticity of the banknote, the size of the banknote, and the like.
  • the first image sensor 311 in the image acquisition mechanism 310 includes a first frame 1, a first light source assembly 2, a first lens array 3, a first photosensitive member 4, and a first light-transmitting plate. 5, wherein the first light-transmitting plate 5 encloses the first light source assembly 2, the first lens array 3, and the first photosensitive member 4 in a chamber on the first frame 1.
  • the light incident surface 31 of the first lens array 3 is disposed at an angle with the first light transmissive plate 5, and the light incident surface 31 of the first lens array 3 is located at the light emitted by the first light emitting surface 21 of the first light source assembly 2.
  • the propagation path of the reflected ray generated by specular reflection occurs on the original.
  • the first light source unit 2 emits incident light for illuminating the original from the first light-emitting surface 21, if the incident light is specularly reflected on the original through the first light-transmitting plate 5, the reflected light generated by the specular reflection After passing through the first light-transmitting plate 5, it is irradiated on the light-incident surface 31 of the first lens array 3, and the first lens array 3 concentrates the received reflected light to the first photosensitive member 4, and the first photosensitive member 4 receives the light.
  • the light that is received outputs a corresponding signal, from which an image of the original can be formed.
  • the angle between the optical axis 32 of the first lens array 3 and the first light-transmitting plate 5 satisfies the condition that the light emitted from the first light-emitting surface 21 perpendicular to the first light-emitting surface 21 is specularly reflected on the original.
  • the generated reflected light is vertically incident on the light incident surface 31 of the first lens array 3, that is, the reflected light is parallel to the optical axis 32.
  • the angle and position of the optical axis 32 are according to the first light emitting surface of the first light source assembly 2.
  • the angle and position of 21, the principle of reflection, the principle of refraction, and the angular relationship between the reflected light and the light incident surface 31 of the first lens array 3 are calculated.
  • the angle between the optical axis 32 and the first light-transmitting plate 5 is 45 degrees
  • the angle between the first light-emitting surface 21 and the first light-transmitting plate 5 is 45 degrees, and is emitted by the first light-emitting surface 21
  • the incident light rays perpendicular to the first light-emitting surface 21 are irradiated onto the light-incident surface 31 of the first lens array 3 by the specular reflection generated by the specular reflection on the original.
  • the first pressure roller 312 is disposed tangentially to the first light-transmitting plate 5 of the first image sensor 311, and the light emitted by the first light-emitting surface 21 of the first light source assembly 2 is irradiated to the first light-transmitting plate 5 at the first pressure. After the surface of the original at the tangent position of the roller 312 and the first light-transmitting plate 5 is reflected to the light-incident surface of the first lens array 3 31.
  • the first pressure roller 312 is a hair roller, and a brush layer is disposed on the outer circumference thereof, the hair roller is tangent to the first light transmission plate 5 of the first image sensor 311, and the first pressure roller 312 is located at two sides of the tangent position.
  • the bristles press the original so that the contact area of the original with the first light-transmitting plate 5 is larger, so that the image acquired by the first image sensor 311 is sharper.
  • the roller surface of the first pressure roller 312 is replaced by another flexible coin layer, so that the portion of the first pressure roller 312 located on both sides of the tangent position presses the original, the original and the first transparent plate.
  • the contact area of 5 is larger to make the image acquired by the first image sensor 311 clearer.
  • FIG. 5 is a schematic view showing an angle of incident light and reflected light when an image sensor is mated with an original according to an embodiment of the present invention
  • FIG. 6 is an incident light and a reflected light when the image sensor is engaged with the adhesive tape according to an embodiment of the present invention.
  • Angle diagram The operation of the image acquisition mechanism 310 will now be described with reference to Figs.
  • the incident light is emitted from the first light-emitting surface 21 of the first light source unit 2, and is reflected after being irradiated onto the original. If there is no adhesive tape on the surface of the original, as shown in Fig. 5, since the surface of the original is microscopically uneven, the reflected light reflected on the surface of the original is reflected at different angles, forming a diffuse reflection, and only partially reflected light is irradiated on the first surface.
  • the first lens array 3 on the light incident surface 31 of the lens array 3 converges the portion of the light to the first photosensitive member 4, and the first photosensitive member 4 outputs a signal based on the received light, at which time the signal output from the first photosensitive member 4 is used.
  • the image of the original is generated; if the surface of the original is pasted with tape, as shown in Fig. 6, since the surface of the tape is smooth, the reflected light of the incident light is irradiated on the surface of the tape, and the reflection angle is the same, forming a specular reflection, and most of the reflected light is irradiated.
  • the first lens array 3 concentrates the portion of the light to the first photosensitive component 4, and the first photosensitive component 4 outputs a signal based on the received light, according to the first photosensitive component 4
  • the output signal generates an original image. Since the light intensity received by the light incident surface 31 of the first lens array 3 when the surface of the original has no adhesive tape is smaller than the light intensity received by the light incident surface 31 of the first lens array 3 when the adhesive tape is applied to the original surface, In the case where there is a difference in the gradation value of the document image formed, the controller determines whether or not the tape is attached to the surface of the document based on the gradation difference of the detected document image.
  • the original is pressed against the light-transmitting plate by using the first pressing roller 312, so that the surface of the tape is smooth and flat, and the light intensity reflected on the surface of the tape is improved.
  • the reflected light is vertically incident on the light incident surface 31 of the first lens array 3, and is irradiated on the light incident surface 31 of the first lens array 3 at an angle to the reflected light, vertically.
  • the luminous flux that is incident on the light incident surface 31 of the first lens array 3 is larger than the luminous flux that is incident on the light incident surface 31 of the first lens array 3 at an angle, so that the reflected light is concentrated in the first lens array 3
  • the gray scale of the image thus generated is brighter, and it is more convenient for the controller to determine whether the surface of the original is pasted with tape.
  • the light incident surface of the lens array of the image sensor provided by the present invention is located on a propagation path of the reflected light generated by the specular reflection of the light emitted from the light source assembly, and the incident light is reflected on the position of the adhesive tape of the original and then reflected to the lens array.
  • the gradation value of the image generated is different from the gradation value of the image generated when the position of the original document is not attached to the lens and then reflected to the lens array, it is possible to determine whether or not the original surface is pasted.
  • the optical axis of the lens array is set to be parallel with the reflected light of the specular reflection of the incident light, so that the gray value and the illumination of the image generated when the incident light is irradiated onto the tape and then reflected to the lens array
  • the difference between the image gradation values in the case where the original without the tape is reflected back to the lens array is larger, and thus the detection result is more accurate.
  • the banknote processing apparatus determines whether the surface of the banknote is pasted according to the difference in the gradation value of the image generated by the image sensor. Tape, the number of parts is small, the structure is compact, and the space is small. Even if the assembly efficiency is improved, the equipment is miniaturized.
  • FIG. 7 is a schematic structural diagram of an image acquisition mechanism of a banknote processing apparatus according to another embodiment of the present invention. As shown in FIG. 7, the embodiment is different from the embodiment corresponding to FIG. 3 and FIG.
  • the image acquisition mechanism 310 in the embodiment further includes a second image sensor 313 and a third pressure roller 314 which are respectively disposed on both sides of the main channel P and are tangentially disposed, wherein the second image sensor 313 and the first pressure roller 312 are located in the main channel On the same side of P, the third pressure roller 314 and the first image sensor 311 are located on the same side of the main channel P, wherein the first image sensor 311 is used to acquire image information of the first side of the banknote, and the second image sensor 313 is used for Obtain image information of the second side of the banknote.
  • the second image sensor 313 includes a second frame 71, a second light source assembly 72, a second lens array 73, a second photosensitive member 74, a third lens array 75, and a second light transmissive plate 76.
  • the second light transmissive plate 76 will be The two light source assemblies 72, the second lens array 73, the third lens array 75, and the second photosensitive member 74 are enclosed in a chamber on the second frame 71.
  • the second lens array 73 and the third lens array 75 respectively converge the respective received light to the second photosensitive component 74.
  • the light emitting surface 721 of the second light source component 72 emits incident light and is irradiated onto the original through the second transparent plate 76.
  • the photosensitive member 74 outputs a corresponding signal based on the received light, whereby a reflected image of the original can be formed.
  • the light incident surface 731 of the second lens array 73 is disposed in the same manner as the light incident surface 31 of the first lens array 3, and will not be described herein.
  • the light incident surface 751 of the third lens array 75 is disposed opposite to and parallel to the light emitting surface 81 of the third light source component 8 of the first image sensor 311, and the light emitted from the light emitting surface 81 of the third light source component 8 penetrates through the first through After the light plate 5, the banknotes, and the second light-transmissive plate 76 are irradiated onto the light-incident surface 751 of the third lens array 75, the third lens array 75 converges the second photosensitive element 74 to the second photosensitive element 74 of the second image sensor 313.
  • the second photosensitive member 74 can generate a transmission image of the banknote according to the output signal of the second photosensitive member 74 according to the received light output signal. Therefore, the image acquisition mechanism 310 in the banknote processing apparatus provided in the present embodiment can not only acquire image information on both sides of the banknote, but also detect whether the surface of the banknote is pasted with tape, and can also detect the transmission image information of the banknote.
  • Fig. 8 is a view showing the configuration of an image pickup mechanism of a banknote processing apparatus according to a third embodiment of the present invention.
  • the difference between the present embodiment and the second embodiment is that, in the embodiment, the first image sensor 311 is not provided with the third light source component 8 , but is disposed in the first light source component 2 .
  • the second light-emitting surface 22 is disposed at an angle between the second light-emitting surface 22 and the first light-emitting surface 21, and the second light-emitting surface 22 is parallel to and opposite to the light-incident surface 751 of the third lens array 75 of the second image sensor 313.
  • the light emitted by the second light-emitting surface 22 of the first light source unit 2 of the first image sensor 311 passes through the first light-transmissive plate 5, the banknotes, and the second light-transmissive plate 76, and then illuminates the light-incident surface of the third lens array 75.
  • the third lens array 75 concentrates the transmitted light received by the light incident surface 751 to the second photosensitive component 74 of the second image sensor 313, and the second photosensitive component 74 according to the received light output signal according to the second photosensitive
  • the output signal of assembly 74 can generate a transmission image of the banknote. This embodiment reduces one light source assembly as compared with the second embodiment, thus reducing the cost of the image sensor.
  • the invention also proposes a method for detecting a spliced banknote, comprising the following steps: using a banknote processing device The banknote is detected; according to the detection result, the gray scale abnormal point corresponding to the tape of the banknote is obtained; if there are two or more gray scale abnormal points on the periphery of the banknote, the banknote is determined to be a tape-stitched banknote.
  • the banknote including the tape splicing banknotes can be simply detected first, thereby improving the inspection efficiency, so as to facilitate subsequent manual inspection or equipment inspection.
  • the peripheral edge refers to a rectangular annular region having a predetermined width (for example, 10 mm) from the edge of the banknote.
  • the gray scale abnormal point corresponding to the tape of the banknote may be obtained by determining the gradation difference value.
  • the identification of the gray scale anomaly corresponding to the tape of the banknote is obtained by an artificial neural network trained by the sample. First, the artificial neural network model is constructed, and then the samples are trained.
  • the corresponding training samples include common various forms of tape splicing banknotes and non-tape splicing banknotes. The more banknote samples, the higher the accuracy, and after the training and verification of the set number of samples, it can be used for the detection of grayscale abnormal points corresponding to the tape.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
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Abstract

一种图像传感器（311,313）和纸币处理装置，该图像传感器（311,313）包括第一感光组件（4）和用于向原稿照射光线的第一光源组件（2），还包括将原稿反射的光线汇聚至第一感光组件（4）的第一透镜阵列（3），第一透镜阵列（3）的入光面位于第一光源组件（2）发出的光线照射在原稿上产生镜面反射的反射光线的传播路径上。纸币处理装置根据图像传感器（311,313）生成的图像灰度值不同来判断纸币表面是否粘贴有胶带，零件数量少、结构紧凑、占用空间小，既便于提高装配效率，又有利于设备小型化。

Description

图像传感器和纸币处理装置 技术领域
本发明涉及一种图像传感器和纸币处理装置。
背景技术
银行等金融机构要求识币器、清分机等纸币处理装置能够检测纸币表面是否粘贴有透明胶带，从而防止不法分子使用透明胶带将部分真币和假币粘贴在一起伪造纸币。现有技术通常使用纸币厚度检测装置检测纸币表面是否粘贴有胶带。
如图1所示，纸币厚度检测装置包括基准辊1′、多个检测组件，以及支撑轴3′。图1中，基准辊1′沿纸币宽度方向延伸，长度与纸币的宽度相适配。支撑轴3′与基准辊1′被设置为间隔相对且相互平行。多个检测组件沿支撑轴3′排布，每个检测组件包括与支撑轴3′套接的支架4′、设置在支架4′上的测厚辊2′、用来偏压支架4′使检测辊2′始终压向基准辊1′的弹性元件5′，以及设置在支架3′上的检测件6′和设置在固定机架上的传感器7′，其中，传感器7’与检测件6′在不同的情况下配合或分离。当纸币在基准辊1′和检测辊2′之间通过时，如果纸币上没有粘贴胶带，则纸币将检测辊2′抬起的高度为纸币的厚度，此时传感器7′与检测件6′之间的距离为第一距离，传感器7′输出第一检测信号。当纸币在基准辊1′和检测辊2′之间通过时，如果纸币上粘贴有胶带，纸币将检测辊2′抬起的高度为纸币与胶带的厚度和，此时传感器7′与检测件6′之间的距离为第二距离，传感器7′输出第二检测信号，根据传感器7′的检测信号，即可判断纸币表面是否粘贴有胶带。
由于这种检测纸币表面是否粘贴有胶带的装置使用的零件多、占用空间大，因此既不利于提高装配效率，也不利于设备小型化。
发明内容
本发明实施例的目的在于提供一种图像传感器，以便可靠地检测原稿上是否粘贴有胶带；本发明实施例的目的还在于提供一种具有上述图像传感器的纸币处理装置。
为此，本发明实施例一方面提供了一种图像传感器，包括第一感光组件和用于向原稿照射光线的第一光源组件，还包括将原稿反射的光线汇聚至第一感光组件的第一透镜阵列，第一透镜阵列的入光面位于第一光源组件发出的光线照射在原稿上产生镜面反射的反射光线的传播路径上。
上述第一透镜阵列的光轴被设置为与第一光源组件发出的光线照射在原稿上产生镜面反射生成的到达第一透镜阵列的入光面的反射光线平行。
上述图像传感器还可以包括第二透镜阵列，第二透镜阵列将透过原稿的光线汇聚至第一感光组件。
上述第一光源组件可以包括导光件，导光件包括呈夹角设置的第一出光面和第二出光面，第一透镜阵列的入光面位于第一出光面发出的光线照射在原稿上产生镜面反射的反射光线的传播路径上。
根据本发明实施例另一方面，提供了一种纸币处理装置，包括用于获取纸币的第一面图像的第一图像传感器，第一图像传感器为根据上面所描述的图像传感器。
上述纸币处理装置还可以包括用于获取纸币的第二面图像的第二图像传感器，第二图像传感器包括第二感光组件、用于向纸币提供光线的第二光源组件、以及将纸币反射的光线汇聚至第二感光组件的第二透镜阵列。
上述第二图像传感器还可以包括将透射纸币的光线汇聚至第二感光组件的第三透镜阵列。
上述第一图像传感器还可以包括用于向纸币照射光线的第三光源组件，第三透镜阵列的入光面位于第三光源组件的出光面发出的光线照射纸币后产生的透射光线的传播路径上。
上述第一光源组件可以包括导光件，导光件包括呈夹角设置的第一出光面和第二出光面，第一透镜阵列的入光面位于第一出光面发出的光线照射在纸币 上产生镜面反射的反射光线的传播路径上，第三透镜阵列的入光面位于第二出光面发出的光线照射纸币后产生的透射光线的传播路径上。
上述纸币处理装置还可以包括与第一图像传感器抵接配合的第一压辊，第一压辊的外周分布有毛刷层。
本发明实施例提供的图像传感器的透镜阵列的入光面位于光源组件发出的光线照射在原稿上产生镜面反射生成的反射光线的传播路径上，入射光线照射在原稿的粘贴胶带的位置后反射给透镜阵列生成的图像的灰度值与照射在原稿的未粘贴胶带的位置后反射给透镜阵列生成的图像的灰度值存在差异，因此，能够据此判断原稿表面是否粘贴有胶带。进一步地，将透镜阵列的光轴设置成与入射光线经镜面反射的反射光线平行，使得在入射光线照射在胶带上后反射给透镜阵列生成的图像灰度值差异更大，以使检测结果更精确。
本发明实施例提供的纸币处理装置，采用带有毛刷层的压辊将纸币的检测币面压平在图像传感器的透光板上进行检测，如此币面平整，币面上胶带的反光效果增强，景深波动范围减小，同时还采用透镜阵列将光线汇聚至感光组件，提高感光元件对胶带反光的敏感度。
与现有技术中通过检测纸币的厚度来检测纸币表面是否粘贴有胶带的方法相比，本发明实施例提供的纸币处理装置根据图像传感器生成的图像灰度值不同来判断纸币表面是否粘贴有胶带，零件数量少、结构紧凑、占用空间小，即便于提高装配效率，又有利于设备小型化。
除了上面所描述的目的、特征和优点之外，本发明实施例还有其它的目的、特征和优点。下面将参照图，对本发明实施例作进一步详细的说明。
附图说明
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是现有技术中的纸币厚度检测装置的结构示意图；
图2是根据本发明的一个实施例的纸币处理装置的结构示意图；
图3是根据本发明的一个实施例的图像传感器的结构剖面图；
图4是根据本发明的一个实施例的纸币处理装置的第一检测机构的结构剖面图；
图5是根据本发明的一个实施例的图像传感器与原稿配合时的入射光线与反射光线的角度示意图；
图6是根据本发明的一个实施例的图像传感器与胶带配合时入射光线与反射光线的角度示意图；
图7是根据本发明的另一个实施例的纸币处理装置的图像获取机构的结构示意图；以及
图8是根据本发明的再一个实施例的纸币处理装置的图像获取机构的结构示意图。
附图标记说明
100、逼纸机构；                  200、进纸机构；
300、纸币信息获取机构；          310、图像获取机构；
320、磁信息获取机构；            1、第一框架；
2、第一光源组件；                3、第一透镜阵列；
4、第一感光组件；                5、第一透光板；
6、输送辊组；                    40、叶轮；
51、第一换向件；                 52、第二换向件；
311、第一图像传感器；            312、第一压辊；
321、磁头；                      322、第二压辊；
313、第二图像传感器；            314、第三压辊；
21、第一出光面；                 22、第二出光面；
31、第一透镜阵列的入光面；       71、第二框架；
72、第二光源组件；               73、第二透镜阵列；
74、第二感光组件；               75、第三透镜阵列；
76、第二透光板；                 721、第二出光面；
731、第二透镜阵列的入光面；      751、第三透镜阵列的入光面；
8、第三光源组件；                81、第三光源组件的出光面；
P、主通道；                      S0、入币口；
S3、退币口；                     S1、第一出钞口；
S2、第二出钞口；                 P1、第一辅通道；
P2、第二辅通道。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
图2是使用本发明实施例提供的图像传感器的纸币处理装置的结构示意图。本实施例中，纸币处理装置为纸币清分机。如图2所示，纸币清分机设置有与外界连通的入币口S0、退币口S3以及至少一个出钞口。纸币清分机包括主通道P、至少一个辅通道、逼纸机构100、进纸机构200、纸币信息获取机构300、输送机构、换向机构，以及驱动机构(图中未示出)。
其中，入币口S0位于主通道P的起始端，入币口S0用于堆叠待处理的纸币；逼纸机构100设置在入币口S0处，用于限制堆叠在入币口S0处的纸币沿纸币宽度方向的位置；进纸机构200用于将堆叠在入币口S0处的纸币一张接一张地送至纸币信息获取机构300处。
每个出钞口通过一个辅通道与主通道P连通，用于容纳经鉴别为正常的纸币；退币口S3位于主通道P的末端，用于容纳经鉴别为异常的纸币，如假币、残币、胶带拼接币等；输送机构用于驱动纸币沿主通道P或辅通道运动。输送机构包括多个输送辊组6和多个叶轮40，其中，多个输送辊组6设置在主通道P和各辅通道上，用于驱动纸币在主通道P或辅通道内运动。输送机构的叶轮40的数量与出钞口和退币口S3的总数量相等，其中，在每个出钞口与相应的辅通道之间设置有一个叶轮40，用于将辅通道内的纸币逐张送入出钞口内，在退币口S3与主通道P之间设置有一个叶轮40，用于将主通道P内的纸币送至退币 口S3内。
本实施例中，纸币清分机包括入币口S0、两个出钞口(即第一出钞口S1和第二出钞口S2)，两个辅通道(即第一辅通道P1和第二辅通道P2)以及退币口S3，输送机构包括三个叶轮40，其中，第一出钞口S1通过第一辅通道P1与主通道P连通，用于容纳经鉴别为正常的第一种纸币，如壹佰元面额的人民币；第二出钞口S2通过第二辅通道P2与主通道P连通，用于容纳经鉴别为正常的第二种纸币，如伍拾元面额的人民币；输送机构的三个叶轮40分别设置在第一辅通道P1与第一出钞口S1之间、第二辅通道P2与第二出钞口S2之间，以及主通道P与退币口S3之间；换向机构包括第一换向件51、第二换向件52，以及第一驱动件和第二驱动件(图中未示出)。其中，第一换向件51设置在主通道P与第一辅通道P1的交汇处，第二换向件52设置在主通道P与第二辅通道P2的交汇处。第一驱动件和第二驱动件可以是凸轮或者电磁铁等。第一驱动件与第一换向件51连接，在第一驱动件的驱动下，第一换向件51可运动到第一位置或第二位置。当第一换向件51位于第一位置时，主通道P与第一辅通道P1连通，位于主通道P内的纸币通过第一换向件51的引导被送至第一辅通道P1内；当第一驱动件驱动第一换向件51运动到第二位置时，主通道P与第一辅通道P1之间的通路被断开，纸币只能沿主通道P继续向下游移动。第二驱动件与第二换向件52连接，在第二驱动件的驱动下，第二换向件52可运动到第一位置或第二位置，其中，当第二换向件52位于第一位置时，主通道P与第二辅通道P2连通，位于主通道P内的纸币通过第二换向件52的引导被送至第二辅通道P2内；当第二驱动件驱动第二换向件52运动至第二位置时，主通道P与第二辅通道P2之间的通路被断开，主通道P与退币口S3连通，主通道P内的纸币被送至退币口S3内。
纸币信息获取机构300设置在主通道P上，包括图像获取机构310和磁信息获取机构320。图像获取机构310用于获取纸币表面的图像信息，图像获取机构310包括位于主通道P两侧相切设置的第一图像传感器311和第一压辊312。磁信息获取机构320用于获取纸币上的磁信息，磁信息获取机构320包括位于主通道P两侧相对设置的磁头321和第二压辊322，当纸币由磁头321和第二压 辊322之间经过时，磁头321读取纸币表面的磁信息。纸币清分机的控制器根据图像获取机构310和磁信息获取机构320的获取的图像信息和磁信息来判断纸币表面是否粘贴有胶带，以及纸币的真伪、面额大小等信息。
图3是根据本发明的一个实施例的图像传感器的结构剖面图，图4是根据本发明的一个实施例的纸币处理装置的图像获取机构的结构剖面图。如图3、图4所示，图像获取机构310中的第一图像传感器311包括第一框架1、第一光源组件2、第一透镜阵列3、第一感光组件4，以及第一透光板5，其中，第一透光板5将第一光源组件2、第一透镜阵列3，以及第一感光组件4封装在第一框架1上的腔室内。
第一透镜阵列3的入光面31与第一透光板5呈夹角设置，且第一透镜阵列3的入光面31位于由第一光源组件2的第一出光面21发出的光线照射在原稿上发生镜面反射生成的反射光线的传播路径上。当第一光源组件2从第一出光面21发射出用于照射原稿的入射光线时，如果该入射光线穿过第一透光板5照射在原稿上发生镜面反射，则镜面反射生成的反射光线穿过第一透光板5后，照射在第一透镜阵列3的入光面31上，第一透镜阵列3将接收到的反射光线会聚到第一感光组件4，第一感光组件4根据接收到的光线输出相应信号，据此可形成原稿的图像。优选地，第一透镜阵列3的光轴32与第一透光板5的夹角满足以下条件：由第一出光面21发出的垂直于第一出光面21的光线照射在原稿上发生镜面反射生成的反射光线垂直地照射在第一透镜阵列3的入光面31上，即反射光线与光轴32平行，此时，光轴32的角度及位置根据第一光源组件2的第一出光面21的角度及位置、反射原理、折射原理、以及反射光线与第一透镜阵列3的入光面31角度关系计算得到。本实施例中，光轴32与第一透光板5的夹角为45度，第一出光面21与第一透光板5的夹角为45度，且由第一出光面21发出的垂直于第一出光面21的入射光线照射在原稿上发生镜面反射生成的反射光线垂直地照射在第一透镜阵列3的入光面31上。
第一压辊312与第一图像传感器311的第一透光板5相切设置，由第一光源组件2的第一出光面21发出的光线经第一透光板5照射在位于第一压辊312与第一透光板5的相切位置处的原稿表面后，反射至第一透镜阵列3的入光面 31上。优选地，第一压辊312为毛辊，其外周分布有毛刷层，该毛辊与第一图像传感器311的第一透光板5相切，第一压辊312的位于相切位置两边的软毛按压原稿，使得原稿与第一透光板5的接触面积更大，以使第一图像传感器311获取的图像更清晰。
在其他实施例中，第一压辊312的辊表面由其他的柔性压币层代替毛刷层，使第一压辊312上位于相切位置两边的部分按压原稿，原稿与第一透光板5的接触面积更大，以使第一图像传感器311获取的图像更清晰。
图5是根据本发明的一个实施例的图像传感器与原稿配合时的入射光线与反射光线的角度示意图，图6是根据本发明的一个实施例的图像传感器与胶带配合时入射光线与反射光线的角度示意图。下面结合图4至图6介绍图像获取机构310的工作原理。
如图4所示，当图像传感器在检测原稿时，由第一光源组件2的第一出光面21发射出入射光线，照射在原稿上后发生反射。如果原稿表面没有粘贴胶带，如图5所示，由于原稿表面微观上凹凸不平，因此入射光线照射在原稿表面后反射回来的光线反射角度不一，形成漫反射，只有部分反射光线照射在第一透镜阵列3的入光面31上第一透镜阵列3将这部分光线会聚给第一感光组件4，第一感光组件4基于接收到的光线输出信号，此时根据第一感光组件4输出的信号生成原稿的图像；如果原稿表面粘贴有胶带，如图6所示，由于胶带表面光滑，因此入射光线照射在胶带表面后反射回来的光线的反射角度相同，形成镜面反射，大部分反射光线照射在第一透镜阵列3的入光面31上，第一透镜阵列3将这部分光线会聚给第一感光组件4，第一感光组件4基于接收到的光线输出信号，此时根据第一感光组件4输出的信号生成原稿图像。由于原稿表面没有粘贴胶带时第一透镜阵列3的入光面31接收到的光线强度小于原稿表面粘贴胶带时第一透镜阵列3的入光面31接收到的光线强度，因此，在上述两种情况下形成的原稿图像的灰度值存在差异，控制器根据检测到的原稿图像的灰度差，判断原稿表面是否粘贴有胶带。
需要指出的是，在本发明实施例中，通过使用第一压辊312将原稿压在透光板上，使得胶带表面光滑又平整，提高了胶带表面反射的光线强度。
当原稿表面发生镜面反射时，反射光线垂直地照射在第一透镜阵列3的入光面31上，与反射光线呈夹角地照射在第一透镜阵列3的入光面31相比，垂直地照射在第一透镜阵列3的入光面31上的光通量要大于呈夹角地照射在第一透镜阵列3的入光面31上的光通量，因此在第一透镜阵列3将该反射光线会聚给第一感光组件4后，由此生成的图像的灰度更亮，更便于控制器判断原稿表面是否粘贴有胶带。
本发明提供的图像传感器的透镜阵列的入光面位于光源组件发出的光线照射在原稿上产生镜面反射生成的反射光线的传播路径上，入射光线照射在原稿的粘贴胶带的位置后反射到透镜阵列的情况下所生成的图像的灰度值与照射在原稿的未粘贴胶带的位置后反射到透镜阵列的情况下所生成的图像的灰度值存在差异，因此，能够据此判断原稿表面是否粘贴有胶带，进一步地，将透镜阵列的光轴设置成与入射光线经镜面反射的反射光线相平行，使得入射光线照射在胶带上后反射到透镜阵列的情况下所生成的图像灰度值与照射在没有胶带的原稿上后反射到透镜阵列的情况下的图像灰度值之间的差异更大，因此检测结果更精确。
与现有技术中通过检测纸币的厚度来检测纸币表面是否粘贴有胶带的方法相比，本发明实施例提供的纸币处理装置根据图像传感器生成的图像灰度值的不同来判断纸币表面是否粘贴有胶带，零件数量少、结构紧凑、占用空间小，即便于提高装配效率，又有利于设备小型化。
图7是根据本发明的另一个实施例的纸币处理装置的图像获取机构的结构示意图，如图7所示，本实施例与图3和图4对应的实施例相比不同之处在于，本实施例中的图像获取机构310还包括分别位于主通道P两侧且相切设置的第二图像传感器313和第三压辊314，其中，第二图像传感器313与第一压辊312位于主通道P的同一侧，第三压辊314与第一图像传感器311位于主通道P的同一侧，其中，第一图像传感器311用于获取纸币的第一面的图像信息，第二图像传感器313用于获取纸币的第二面的图像信息。
第二图像传感器313包括第二框架71、第二光源组件72、第二透镜阵列73、第二感光组件74、第三透镜阵列75，以及第二透光板76。第二透光板76将第 二光源组件72、第二透镜阵列73、第三透镜阵列75，以及第二感光组件74封装在第二框架71上的腔室内。第二透镜阵列73和第三透镜阵列75均将各自接收的光线会聚给第二感光组件74，第二光源组件72的出光面721发射入射光线，经第二透光板76照射在原稿上后发生镜面反射，反射光线经过第二透光板76后，垂直地照射在第二透镜阵列73的入光面731上，第二透镜阵列73将该反射光线会聚到第二感光组件74，第二感光组件74根据接收到的光线输出相应信号，据此可形成原稿的反射图像。第二透镜阵列73的入光面731设置形式同第一透镜阵列3的入光面31的设置形式，在此不再赘述。第三透镜阵列75的入光面751被设置为与第一图像传感器311的第三光源组件8的出光面81相对且平行，第三光源组件8的出光面81发出的光线穿透第一透光板5、纸币、第二透光板76后，照射在第三透镜阵列75的入光面751上，第三透镜阵列75将其会聚给第二图像传感器313的第二感光组件74，第二感光组件74根据接收到的光线输出信号，根据第二感光组件74的输出信号可以生成纸币的透射图像。因此本实施例提供的纸币处理装置中的图像获取机构310不但可以获取纸币正反两面的图像信息，检测纸币表面是否粘贴有胶带，还可以检测纸币的透射图像信息。
图8是根据本发明第三实施例的纸币处理装置的图像获取机构的结构示意图。如图8所示，本实施例与第二实施例相比不同之处在于，本实施例中，第一图像传感器311没有设置第三光源组件8，而是在第一光源组件2中设置了第二出光面22，第二出光面22与第一出光面21呈夹角设置，第二出光面22与第二图像传感器313的第三透镜阵列75的入光面751平行且相对。第一图像传感器311的第一光源组件2的第二出光面22发射的光线，穿过第一透光板5、纸币、第二透光板76后照射在第三透镜阵列75的入光面751上，第三透镜阵列75将其入光面751接收到的透射光线会聚给第二图像传感器313的第二感光组件74，第二感光组件74根据接收到的光线输出信号，根据第二感光组件74的输出信号可以生成纸币的透射图像。本实施例与第二实施例相比减少一个光源组件，因此降低了图像传感器的成本。
本发明还提出了拼接纸币的检测方法，包括以下步骤：使用纸币处理装置 对纸币进行检测；根据检测结果获得纸币的与胶带对应的灰度异常点；若纸币四周边缘存在两个以上的灰度异常点，则判定纸币为胶带拼接纸币。
通过以上方法，可简单地先将包括胶带拼接纸币的纸币给检测出来，提高了排查效率，以方便后续的人工排查或设备排查。需要指出的是，四周边缘是指距离纸币边沿预定宽度(例如10mm)的矩形环状区域。
在上述方法中，上述纸币的与胶带对应的灰度异常点可由灰度差值确定获得。在本发明的一优选实施例中，上述纸币的与胶带对应的灰度异常点的识别由经过样本训练的人工神经网络获得。首先构建人工神经网络模型，之后拿样本进行训练，相应的训练样本包括常见的各种形式的胶带拼接纸币和非胶带拼接纸币。纸币样本越多，准确性越高，再经过设定数量的样本的训练和校验后，即可用于与胶带对应的灰度异常点的检测。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种图像传感器，包括第一感光组件和用于向原稿照射光线的第一光源组件，其特征在于，还包括将所述原稿反射的光线汇聚至所述第一感光组件的第一透镜阵列，所述第一透镜阵列的入光面位于所述第一光源组件发出的光线照射在所述原稿上产生镜面反射的反射光线的传播路径上。
  2. 根据权利要求1所述的图像传感器，其特征在于，所述第一透镜阵列的光轴与所述第一光源组件发出的光线照射在所述原稿上产生镜面反射生成的、到达所述第一透镜阵列的入光面的反射光线平行。
  3. 根据权利要求1所述的图像传感器，其特征在于，还包括第二透镜阵列，所述第二透镜阵列将透过所述原稿的光线汇聚至所述第一感光组件。
  4. 根据权利要求1所述的图像传感器，其特征在于，所述第一光源组件包括导光件，所述导光件包括呈夹角设置的第一出光面和第二出光面，所述第一透镜阵列的入光面位于所述第一出光面发出的光线照射在所述原稿上产生镜面反射的反射光线的传播路径上。
  5. 一种纸币处理装置，包括用于获取纸币的第一面图像的第一图像传感器，其特征在于，所述第一图像传感器为根据权利要求1或2所述的图像传感器。
  6. 根据权利要求5所述的纸币处理装置，其特征在于，还包括用于获取所述纸币的第二面图像的第二图像传感器，所述第二图像传感器包括第二感光组件、用于向纸币照射光线的第二光源组件、以及将所述纸币反射的光线汇聚至所述第二感光组件的第二透镜阵列。
  7. 根据权利要求6所述的纸币处理装置，其特征在于，所述第二图像传感器还包括将透射所述纸币的光线汇聚至所述第二感光组件的第三透镜阵列。
  8. 根据权利要求7所述的纸币处理装置，其特征在于，所述第一图像传感器还包括用于向所述纸币照射光线的第三光源组件，所述第三透镜阵列的入光面位 于所述第三光源组件的出光面发出的光线照射所述纸币后产生的透射光线的传播路径上。
  9. 根据权利要求7所述的纸币处理装置，其特征在于，所述第一光源组件包括导光件，所述导光件包括呈夹角设置的第一出光面和第二出光面，所述第一透镜阵列的入光面位于所述第一出光面发出的光线照射在所述纸币上产生镜面反射的反射光线的传播路径上，所述第三透镜阵列的入光面位于所述第二出光面发出的光线照射所述纸币后产生的透射光线的传播路径上。
  10. 根据权利要求6所述的纸币处理装置，其特征在于，还包括与所述第一图像传感器抵接配合的第一压辊，所述第一压辊的外周分布有毛刷层。
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