CN104215613A - Paper recognition device and optical sensor device - Google Patents
Paper recognition device and optical sensor device Download PDFInfo
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- CN104215613A CN104215613A CN201410242406.0A CN201410242406A CN104215613A CN 104215613 A CN104215613 A CN 104215613A CN 201410242406 A CN201410242406 A CN 201410242406A CN 104215613 A CN104215613 A CN 104215613A
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- 101100215647 Aspergillus flavus (strain ATCC 200026 / FGSC A1120 / IAM 13836 / NRRL 3357 / JCM 12722 / SRRC 167) aflR gene Proteins 0.000 description 2
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Abstract
The invention provides a paper recognition device and an optical sensor device so that the detection precision of fluorescence emitted by paper can be improved. The paper recognition device comprises an optical sensor portion and a recognition portion, the optical sensor portion comprises a conveying path, a light source portion, an optical splitter for splitting the fluorescence along a first direction vertical to the conveying direction along a second direction vertical to the first direction, a light reception portion comprising a plurality of light reception elements arranged in a grid manner along the first direction and the second direction, and a signal processing portion for outputting fluorescent splitting image signals corresponding to the splitting of the fluorescence in an optical manner, and the recognition portion recognizes the paper based on the fluorescent splitting image signals outputted by the optical sensor portion.
Description
Technical field
The present invention relates to as such paper such as bank note or securities, especially the paper comprising the image (following, to be also called " fluorescence radiation image ") sending fluorescence is carried out to the sheet paper identification device identified.
Background technology
In order to identify the paper comprising fluorescence radiation image, such as, utilize the device that the optical line sensor device recorded in patent documentation 1 detects as the pattern (pattern) of the image to paper.The optical line sensor device of patent documentation 1 is accepted, each photo detector of the fluorescence sent from paper via each color filter sensor assembly of R, G, B thus to the device that the pattern of the image of the fluorescence of each color detects by the paper irradiating ultraviolet light to detected object.The pattern of the image of the fluorescence of each color detected by optical line sensor device is used in the identification of paper.
Patent documentation 1: JP 2012-68731 publication
But the fluorescent material be used in paper has various material, the color of fluorescence is also various.Such as, have with red, green, yellow, the visible ray of the wavelength of the monochrome that blueness etc. are different sends the material of fluorescence, also has the material sending fluorescence with the visible ray that the wavelength of multiple color is carried out being obtained by mixing.In addition, the material having fluorescent material to be made up of organism, has the material be made up of the inorganics of terres rares etc., sends the wavelength of fluorescence, spectral distribution is different.Such as, even if the peak wavelength of fluorescence is equal, also because organism is from the difference of inorganics and the spectral distribution of fluorescence is different.Generally, the spectral distribution of organic fluorescent material is wide and mild, and the spectrum of the fluorescent material of inorganics is narrow and sharply.
Therefore, in the optical line sensor device in the past recorded in patent documentation 1, be difficult to the above-mentioned various differences sending the color of fluorescence to be distinguished in detail detect, abundant not in the accuracy of detection of the fluorescence sent at paper, the accuracy of identification aspect based on the paper of the difference of fluorescence is abundant not.
Summary of the invention
The object of this invention is to provide a kind of improve the fluorescence that paper sends accuracy of detection and improve the sheet paper identification device of the accuracy of identification of paper.
In order to solve the problem, sheet paper identification device of the present invention possesses optical sensor portion and carries out the identification part of identification of described paper.Described optical sensor portion possesses: transport path; Light source portion; Optical splitter, carries out light splitting by the fluorescence along the 1st direction vertical with throughput direction along the 2nd direction vertical with described 1st direction; Light accepting part, has along described 1st direction and described 2nd direction with the light accepting part of multiple photo detectors of grid-like arrangement; And signal processing part, export the fluorescence spectrophotometer picture signal with the light splitting photophase of described fluorescence.The identification of described paper, based on the described fluorescence spectrophotometer picture signal exported from described optical sensor portion, is carried out in described identification part.
Invention effect
According to the present invention, the difference of the iridescent sent from paper can be distinguished accurately, and the high-precision identification of paper can be carried out.
Accompanying drawing explanation
Fig. 1 is the key diagram of the schematic configuration of the paper money identifier represented as embodiment 1.
Fig. 2 (A) is the key diagram of the schematic configuration representing optical sensor portion.
Fig. 2 (B) is the key diagram of the schematic configuration representing optical sensor portion.
Fig. 3 is the key diagram of the relation representing the light splitting light from optical splitter that light accepting part irradiates with the sensitive surface to light accepting part.
Fig. 4 represents the key diagram with the example of the block of the wire of the bank note of certain fed distance unit differentiation.
Fig. 5 is the key diagram of the example representing the spectral image read by light accepting part.
Fig. 6 is the key diagram of other examples representing the spectral image read by light accepting part.
Fig. 7 is the key diagram of another other example representing the spectral image that read by light accepting part.
Fig. 8 is the key diagram of the example representing the fluorescence spectrophotometer distribution detected in the position coordinates in Fig. 7 shown in (b).
Fig. 9 represents the spectral image of the bank note by reading the block by each wire to be combined and the key diagram of an example of fluoroscopic image that shows by specific iridescent of the bank note obtained.
Figure 10 is the key diagram of the schematic configuration in the optical sensor portion of the paper money identifier representing embodiment 2.
Figure 11 is the key diagram of the switching representing the luminescence of ultraviolet light and the luminescence of white light.
Figure 12 represents by the light accepting part timesharing ground key diagram of example of the reflection beam splitting image that reads and fluorescence spectrophotometer image.
Description of reference numerals
10 ... paper money identifier; 10A ... paper money identifier; 10B ... paper money identifier; 11 ... transport path; 11x ... imaginary centres face; 12 ... scrambler portion; 13 ... feed drive portion; 13a ... conveying roller; 13b ... conveying roller; 14 ... optical sensor portion; 14B ... optical sensor portion; 15 ... Magnetic Sensor portion; 16 ... control part; 16a ... identification part; 21 ... light source portion; 21B ... light source portion; 22 ... light guiding lens; 22b ... bottom surface; 22s ... end face; 22t ... convex surface; 25 ... lens arra; 26 ... optical splitter; 27 ... light accepting part; 27p ... photo detector; 28 ... signal processing part; 29 ... optical processing substrate; 30 ... casing (housing); 41 ... light-guiding mechanism; S ... bank note; DL ... irradiation area.
Embodiment
Below, as the embodiment of sheet paper identification device of the present invention, so that the paper money identifier of the bank note among the papers such as bank note, securities, check as identification object is described.Paper money identifier is built in the various equipment processed bank note at ATM (Automated Teller Machine) such automatic trading apparatus, automatic compensation ticketing machine, ticket machine etc. of financial institution's setting.
[embodiment 1]
Embodiment 1 is to reading the pattern (pattern) (being also called " fluoroscopic image ") of the fluorescence sent from bank note and the paper money identifier carrying out the identification of bank note is described.
Fig. 1 is the key diagram of the schematic configuration of the paper money identifier 10 represented as embodiment 1.This paper money identifier 10 possesses transport path 11, feed drive portion 13 along transport path 11 configures successively, optical sensor portion 14, Magnetic Sensor portion 15, scrambler portion 12 and control part 16.
The Width (y direction) that feed drive portion 13 possesses along transport path 11 in the x-direction sets up and conveying roller 13a, 13b opposed on above-below direction (z direction).Conveying roller 13a, 13b are driven by transmitting revolving force by conveying motor (not illustrating) and are rotated.The conveying roller 13a of upside is the driving side conveying roller driven by conveying motor, and the conveying roller 13b of downside is the slave end conveying roller of the rotation of the conveying roller 13a being driven in upside.The bank note S guiding to transport path 11 successively clamps with a pair conveying roller 13a, 13b by feed drive portion 13, and carries to the back-end along transport path 11.In addition, bank note S, with state of growing crosswise that is short on throughput direction (x direction) and that above grow at Width (y direction), transport path 11 is transferred.
The timing that the clock of pulse type carries out carrying as feed drive portion 13, every the delivery interval (transport cycle) representing certain fed distance, exports by scrambler portion 12.Optical sensor portion 14, according to the action timing based on clock, reads the pattern of the bank note S be transferred successively by every transport cycle.Magnetic Sensor portion 15, according to the action timing based on clock, differentiates the magnetic of the magnetic ink be coated on the bank note S that is transferred.
Control part 16 controls based on the action of clock to feed drive portion 13, optical sensor portion 14 and Magnetic Sensor portion 15, and based on the pattern-information of the bank note S read by optical sensor portion 14 and the magnetic information of bank note S that differentiated by magnetism sensor 15, carry out the discriminating of the identification of the Currency Type of bank note, the detection of number, the true and false of bank note.
Fig. 2 (A) and Fig. 2 (B) is the key diagram of the schematic configuration representing optical sensor portion 14.Optical sensor portion 14 is configured in the casing (housing) 30 of box like, possesses light source portion 21, lens arra 25, optical splitter 26, light accepting part 27 and is provided with the optical processing substrate 29 of signal processing part 28.
Light source portion 21 possesses the multiple LED23 sending ultraviolet light being configured to row along y direction and each light shafts sent by multiple LED23 diffusion and as the light guiding lens 22 that penetrates of light shafts summed up.The ultraviolet light that LED23 sends is set to the wavelength of the fluorescent material encouraged contained by bank note S.
Light guiding lens 22 has opposed with multiple LED23 plane bottom surface 22b, has in the y-direction the cylindrical lens (cylindrical lens) of the convex surface 22t that (Width of transport path 11) extends relative to bottom surface 22b with multiple LED23 opposition side.Multiple LED23 is arranged on LED array substrate 24 along the arrangement of y direction, and be configured near the 22b of bottom surface, the outgoing plane being more preferably configured to LED23 connects with bottom surface 22b, with the bottom surface 22b making the light sent separately be incident to light guiding lens 22 expeditiously.
The region of the wire of the regulation transport path 11 is penetrated in the illumination that light source portion 21 is arranged to penetrate from light guiding lens 22.Such as, light source portion 21 is arranged from the position of the top in the downstream of transport path 11 towards the mode of the irradiation area DL of the upstream side of transport path 11 obliquely with the optical axis center of light source 21, with on the imaginary centres face 11x (face parallel plane with xy) of transport path 11, the irradiation area DL to wire elongated in y-direction irradiates light.Irradiation area DL is set to covering one end from the long side direction (y direction) of the bank note S transported to the other end.In addition, the light irradiating the irradiation area DL of wire is (following, also be called " irradiation light ") light that is not limited to wire or the band shape (hereinafter referred to as " wire etc. ") that along with throughput direction vertical y direction extend same with irradiation area DL.As long as can carry out irradiating to cover irradiation area DL, then not necessarily needing is the irradiation light of the wire vertical with throughput direction etc.But, if consider the illumination efficiency of light, then the irradiation light of the wire in preferably parallel with the direction of the line of irradiation area DL, namely substantially vertical with throughput direction in fact scope, in the scope of such as 90 degree ± 10% etc.In addition, the more close direction vertical with throughput direction is then more preferred, and the irradiation light of the wire vertical with throughput direction etc. most preferably.In addition, the direction of the irradiation area DL of wire is also not limited to the direction vertical with throughput direction, also can be in substantially vertical scope, direction in the scope of such as 90 degree ± 10%.Wherein, the more close direction vertical with throughput direction is then more preferred, and the direction vertical with throughput direction most preferably.
Lens arra 25 is the lens elements with the structure arranged towards the optical axis center in z direction vertical with x direction (throughput direction) and y direction, multiple rod-shaped lens of shape elongated in a z-direction along y direction from irradiation area DL.The reflected light of the light irradiated to the part (being also called " illuminated part ") of the bank note S being delivered to irradiation area DL and Yong Zuo not show the image light of the image the illuminated part of bank note S from the fluorescence that bank note S sends.But, in this example, as described below, only have fluorescence to be used as effective image light.The mode that the optical image (spectral image) that lens arra 25 shows with the image light made from the bank note S being delivered to irradiation area DL is imaged on the sensitive surface of light accepting part 27 focuses on.
Optical splitter 26 is configured between lens arra 25 and light accepting part 27, by the image light of the wire penetrated from lens arra 25 (being also called " band shape ") along the direction light splitting vertical with y direction, be transformed to the spectral image light of the Two dimensional Distribution shape (planar) spread along the direction vertical with y direction.As this optical splitter 26, use various prism, grating (diffraction grating) etc.In this example, be set to the prism using triangle column.The light splitting wavelength optical picture (light splitting wavelength graph picture) of the different each light of spectral image light performance wavelength of the Two dimensional Distribution shape penetrated from optical splitter 26 is configured in the spectral image of the Two dimensional Distribution shape the position corresponding to each wavelength respectively.In addition, by the light of optical splitter 26 because wavelength is shorter, light reflects more by force, and therefore on the direction vertical with y direction, light splitting is from bottom to up the light of (in figure, towards right oblique direction) short wavelength side to long wavelength side.In addition, the direction of the line of the image light of wire is equivalent to the 1st direction of the present invention, and the direction that the image light of wire is split is equivalent to the 2nd direction of the present invention.The direction (the 2nd direction) that the portrait light of this wire is split is not limited to the direction vertical with the 1st direction (in this example y direction), also can be in substantially vertical scope, direction in the scope of such as 90 degree ± 10%.But the more close direction vertical with the 1st direction is then more preferred, and the direction vertical with the 1st direction most preferably.
Fig. 3 is the key diagram of the relation representing the spectral image light that light accepting part 27 irradiates with the sensitive surface to light accepting part 27.Light accepting part 27 is that multiple photo detector 27p is at main scanning direction (the v direction parallel with y direction) and the upper dimension sensor arranged of the sub scanning direction (w direction) vertical with main scanning direction.Photo detector 27p is the components of photo-electric conversion light of acceptance being transformed to the electromotive force strong and weak corresponding to it, and its action is controlled by not shown driving circuit.As light accepting part 27, the various dimension sensor IC having been entered photo detector and driving circuit by group can be used, such as cmos sensor, ccd sensor.
Multiple photo detector 27p of light accepting part 27 are arranged in lattice-shaped in the face be made up of distribution arrangement i.e. the 1st direction and the 2nd direction of the spectral image light penetrated from optical splitter 26, accept light splitting light (spectral image light) Ysa penetrated from optical splitter 26.Therefore, the coordinate (being also called " position coordinates ") of the position of the long side direction (y direction) of the positional representation performance bank note S of the photo detector 27p that main scanning direction v arranges, the positional representation performance of the photo detector 27p that sub scanning direction w arranges is from the long wavelength side of light splitting light Ysa to the coordinate (being also called " wavelength coordinate ") of the wavelength of short wavelength side.
In light accepting part 27, by carrying out light-to-current inversion to the light accepted by each photo detector 27p, the Dichroic Optical picture that accepted light splitting light (spectral image light) shows is read as spectral image.But as mentioned above, the action of each photo detector 27p was controlled by per clock period (be also called " transport cycle ", or " during conveying "), and this clock is the clock exported from scrambler portion 12 by often certain fed distance of bank note S.Therefore, in fact, read successively using the Dichroic Optical picture in each region (block) of the wire (band shape) of the bank note S of certain fed distance unit differentiation as spectral image.Therefore, the resolution of the reading of the short side direction (throughput direction, x direction) of bank note S is the operational throughput (fed distance) of the bank note S in transport cycle.In addition, the resolution of the long side direction (direction vertical with throughput direction, y direction) of bank note S corresponds to the number of permutations of the main scanning direction of photo detector 27p.In addition, the number of permutations of the sub scanning direction of photo detector 27p corresponds to the resolution of point optical wavelength.The number of permutations of the photo detector 27p of main scanning direction is more, and more can identify the position of the long side direction of bank note S in detail, the number of permutations of the photo detector of sub scanning direction is more, more can identify the difference of wavelength, the i.e. color of detected light in detail.In addition, the fed distance of the bank note S in transport cycle is shorter, more can identify the position of the short side direction (throughput direction) of bank note S in detail.
Fig. 4 represents the key diagram with the example of the block of the wire of the bank note S of certain fed distance unit differentiation.DA (1) ~ DA (n) represents the block of the wire read in each transport cycle.
The simulating signal corresponding with the spectral image read by light accepting part 27 is processed by the signal processing part 28 (Fig. 2 (A) and Fig. 2 (B)) be arranged on optical processing substrate 29, carries out various computing processing process.Thus, the various image informations read from bank note S are obtained.In addition, signal processing part 28 is made up of by integrated IC the circuit carrying out above-mentioned various process usually.The various image informations of the bank note S obtained by signal processing part 28 are sent to the identification part 16a of control part 16.Identification part 16a carries out the identification of bank note S based on the image information obtained.
In paper money identifier 10, can based in optical sensor portion 14 read bank note S image, specifically based on the spectral image of the spectral image light of each piece of fluorescence sent of the wire by bank note S, carry out the identification of bank note S as described below.
Fig. 5 is the key diagram of the example representing the spectral image read by light accepting part 27.In Fig. 5, a part for the spectral image read by light accepting part 27 cuts out and represents by (a).Each pixel that sub scanning direction arranges corresponds to nine bandwidth distinguished by every bandwidth 25nm, each centre wavelength distinguished is 680,655,630,605,580,555,530,505,480nm.In addition, each pixel that main scanning direction arranges corresponds to the position of long side direction of bank note S, in order to easy explanation in this example, the interval that the length be expressed as every the long side direction by bank note S is carried out 20 deciles and obtained distinguish after region.In addition, the color in Fig. 5 in pixel shown in (a) is denseer, and the light intensity detected is higher, is brighter pixel.
In Fig. 5, the spectral image of (a) represents that the line of the pixel of the wavelength coordinate corresponding with centre wavelength 580nm is detected as the state of the line of the high and bright pixel of light intensity.In this case, such as, in Fig. 5 shown in (b), can pick out in the block DA of the wire of the bank note S being read spectral image, the fluoroscopic image Pfla sending the fluorescence of the color corresponding with the wavelength coordinate detected is formed along the long side direction of bank note S with wire (band shape).Specifically, the coordinate of the wavelength coordinate of the line of the pixel detected in this spectral image to be centre wavelength be 580nm, therefore, it is possible to the color picking out the fluorescence that fluoroscopic image Pfla sends is yellow.In addition, the lightness of iridescent can carry out identification according to the intensity of the light detected in each pixel.
In addition, about above-mentioned spectral image, be illustrated for the fluoroscopic image sending yellow fluorescence, but send in the fluoroscopic image of the fluorescence of other colors also identical.In addition, the color of the general visible ray of about 380nm ~ about 780nm can not only be picked out, and send the ultraviolet light of more short wavelength side, the fluoroscopic image of fluorescence of the infrared light of longer wavelength side too can identification.
Fig. 6 is the key diagram of other examples representing the spectral image read by light accepting part 27.In Fig. 6 the spectral image of (a) also a part by the spectral image that by light accepting part 27 read same with (a) in Fig. 5 cut out and represent.This spectral image represents that the line of the pixel of the wavelength coordinate corresponding with centre wavelength 630nm, 580nm and 530nm is detected as the state of the line of the high and bright pixel of light intensity respectively.Also same with the situation of spectral image illustrated in fig. 5 in this case, such as, in Fig. 6 shown in (b), can pick out in the block DA of the wire of the bank note S being read spectral image, the fluoroscopic image Pflb sending the fluorescence of the color corresponding with the wavelength coordinate detected is formed along the long side direction of bank note S with wire (band shape).Specifically, the wavelength coordinate of the line of the pixel detected in this spectral image is centre wavelength 630nm, 580nm and 530nm, therefore, it is possible to the color picking out the fluorescence that fluoroscopic image Pflb sends is this 3 look of red, yellow, and green.In addition, the lightness of each iridescent can carry out identification according to the intensity of each light.In addition, in this spectral image, be illustrated for the situation sending these three iridescent of red, yellow, and green, but too can identification when sending other multiple iridescent.
As previously discussed, in Fig. 5,6, in the spectral image read, the fluoroscopic image of the iridescent represented by wavelength coordinate corresponding to the line that sends the pixel high and bright with light intensity can be picked out, and the iridescent and lightness thereof that send from bank note S can be detected, therefore, it is possible to be used in the identification of bank note S.In addition, on the contrary, by detecting the state of the specific wavelength coordinate, the i.e. light intensity of the line of the pixel of specific iridescent that predetermine, thus the fluoroscopic image with or without sending specific iridescent can be detected, therefore, it is possible to be used in the identification of bank note S.
Fig. 7 is the key diagram of another other example representing the spectral image that read by light accepting part 27.In Fig. 7 the spectral image of (a) also a part by the spectral image that by light accepting part 27 read same with (a) in (a), Fig. 6 in Fig. 5 cut out and represent.This spectral image illustrates that the line of the pixel of the position coordinates of the ad-hoc location of the long side direction (y direction) representing bank note S is detected as the state of the line of the high and bright pixel of light intensity.In this case, such as, in Fig. 7 shown in (b), can pick out on the ad-hoc location of the long side direction of among the block DA of the wire of the bank note S being read light splitting portrait, corresponding with the position coordinates detected bank note S, be formed with the fluoroscopic image Pflc sending fluorescence.In addition, the color of fluorescence that sends of fluoroscopic image Pflc and lightness thereof can carry out identification according to the intensity of the wavelength coordinate detected and light.Due to can the position of the pixel that light intensity is high and bright in the spectral image that reads of identification, and the iridescent and lightness thereof that send from bank note S on this position can be detected, therefore, it is possible to be used in the identification of bank note S.In addition, the fluorescent material with or without sending the specific iridescent predetermined can also be detected.In addition, as described below, also used fluorescent material can be determined according to the distribution of the intensity of the light of the fluorescence detected in each wavelength coordinate (following, to be also called " fluorescence spectrophotometer distribution ").
Fig. 8 is the key diagram of the example representing the fluorescence spectrophotometer distribution detected in the position coordinates in Fig. 7 shown in (b).In such as Fig. 8, shown in (a), fluorescence spectrophotometer distributes precipitous, known is fluorescent material based on mineral compound.In addition, in such as Fig. 8, shown in (b), fluorescence spectrophotometer distributes mild, known is fluorescent material based on organic compound.Like this, used fluorescent material can be determined based on the shape of the Wavelength distribution of fluorescence (spectral distribution).
Fig. 9 is the key diagram of the example representing the fluoroscopic image that the bank note S obtained combining the spectral image of each piece of bank note read by wire shows by specific iridescent.By the spectral image of bank note S read successively from each piece (with reference to Fig. 4) by wire, cut out line PDA (the 1) ~ PDA (n) of the pixel of specific wavelength coordinate respectively and combine, the fluoroscopic image Pfls only showing bank note S by the iridescent of the wavelength corresponding with specific wavelength coordinate can be generated.The fluoroscopic image Pfls of Fig. 9 represents the example defining and send fluorescence, the i.e. rectangular-shaped image Pfl1 ~ Pfl4 of the fluorescence of yellow that wavelength is 580nm.Like this, by generating the image only showing bank note S by the iridescent of the wavelength corresponding with specific wavelength coordinate, the identification of bank note S can be used in.
As described above, in the paper money identifier 10 of the present embodiment, by optical sensor portion 14, light splitting is carried out to the fluorescence sent from bank note S, and detect position and the lightness of the fluorescence of the color represented by wavelength after sending light splitting in detail, the color of fluorescence and the difference of lightness can be distinguished in detail thus.Thereby, it is possible to read the pattern (fluoroscopic image) of the fluorescence of bank note S accurately, the identification of bank note S can be carried out accurately.
[embodiment 2]
The pattern (fluoroscopic image) reading the fluorescence occurred from bank note is similarly to Example 1 described in embodiment 2, and read the pattern (being also called " non-fluorescence image ") of the reflected light from bank note in the lump, carry out the paper money identifier of the identification of bank note.
Figure 10 is the key diagram of the schematic configuration of the optical sensor portion 14B of the paper money identifier 10B representing embodiment 2.Optical sensor portion 14B possesses light source portion 21B to replace the light source portion 21 in the optical sensor portion 14 of embodiment 1.Structure beyond it is substantially the same manner as Example 1, omits the explanation to other structures.
Light source portion 21B is provided with the LED40 sending and to have the wide and common light of uniform wavelength diffusion properties as natural light, such as send white light at the end face 22s of the side, y direction of light guiding lens 22, and is provided with light-guiding mechanism 41 at the bottom surface 22b of light guiding lens 22 along y direction.But, might not need to be white light, as long as have the light of the visible wavelength distribution character of the light of the color that can read the paper S that will identify.In this example, be set to and send white light.The light sent from LED40 is incident from end face 22s, is reflected, penetrate thus in the mode of irradiating irradiation area DL from convex surface 22r by light-guiding mechanism 41.In addition, light-guiding mechanism 41 such as can be made up of reflecting plate.In addition, also can be set to by the structure of the bottom surface 22b by light guiding lens 22 and be incident to from LED40 the fully reflecting surface that the light in light guiding lens 22 reflects to the direction of convex surface 22t, light-guiding mechanism 41 is set thus.In addition, also at the bottom surface 22b of light guiding lens 22, total reflection prism can be set as light-guiding mechanism 41.
Figure 11 is the key diagram of the switching representing the luminescence of ultraviolet light and the luminescence of white light.In Figure 11, (a) represents the clock that often certain fed distance of pressing bank note S exports from scrambler portion 12, during 1 cycle of this clock represents the conveying of bank note S.In Figure 11, (b) expression carries out timesharing by during the conveying of (a) in Figure 11, during the first half LED40 of transport cycle is lit and sends white light, in Figure 11, the transport cycle of (a) in Figure 11 is carried out timesharing, during the latter half of LED23 of transport cycle is lit and sends ultraviolet light by (c) expression.In addition, lighting of these LED23 and LED40 is performed by the starting controlling circuit be arranged on LED array substrate 24 (not illustrating).
During the white color light emitting of the first half in Figure 11 shown in (b), the light splitting light exposing to the reflected light (being also called " reflected image light " or " non-fluorescence image light ") of the white light of bank note S (is also called " reflection beam splitting light " or " non-fluorescence light splitting light ", in addition, be also called " reflection beam splitting image light " or " non-fluorescence spectral image light ") represented by Dichroic Optical picture be read as spectral image (" reflection beam splitting image " or " non-fluorescence spectral image ").In addition, in during latter half of UV-light luminous in fig. 11 shown in (c), similarly to Example 1, the Dichroic Optical picture represented by light splitting light (being also called " fluorescence spectrophotometer light " or " fluorescence spectrophotometer image light ") of fluorescence is read as spectral image (also becoming " fluorescence spectrophotometer image ").That is, be transferred at bank note S and read in the once reading process of the information of bank note S, carrying out timesharing by the transport cycle often certain fed distance by bank note S distinguished, common reflection beam splitting image and fluorescence spectrophotometer image both sides can be read.
Figure 12 represents by the light accepting part 27 timesharing ground key diagram of example of the reflection beam splitting image that reads and fluorescence spectrophotometer image.In Figure 12, in the reflection beam splitting image of (a) and Figure 12, the fluorescence spectrophotometer image of (b) is the spectral image read in the block (with reference to Fig. 4) of the wire corresponding with identical transport cycle at bank note S.In Figure 12, the spectral image of (a), (b) also all cuts out with (a) same part by the spectral image read by light accepting part 27 in (a), Fig. 7 in (a), Fig. 6 in Fig. 5 and represents.
In Figure 12 (a) reflection beam splitting image in represent that the denseer then volume reflection of color in pixel is more and brighter.Therefore, pixel region Aw1, Aw2, compared with the Aw3 of these neighboring pixel regions, illustrate the state that volume reflection is many and bright.Can pick out as shown in (c) in Figure 12 thus, be read reflection beam splitting image bank note S wire block DA among the location of pixels corresponding with pixel region Aw1 on, be formed with the image Pwa of the color of lightness corresponding to the light intensity comprised with centre wavelength under each wave band being the wave band of 505n ~ 605nm.In addition, can pick out on the location of pixels corresponding with pixel region Aw2, be formed with the image Pwb of the color of lightness corresponding to the light intensity comprised with centre wavelength under each wave band being the wave band of 580nm ~ 630nm.
In addition, in Figure 12 (b) fluorescence spectrophotometer image in represent that the denseer then fluorescence volume of color in pixel is more and bright.Therefore, the state that pixel region Afl1 is detected the fluorescence of centre wavelength 580nm, image-region Afl2 is detected the fluorescence of centre wavelength 630nm is shown.Can pick out as shown in (c) in Figure 12 thus, be read fluorescence spectrophotometer image bank note S wire block DA among the location of pixels corresponding with pixel region Afl1, Afl2 on, be formed with the image Pfld sending yellow and red fluorescence.
In addition, in above-mentioned reflection beam splitting image, can pick out the lightness of the color corresponding with each wavelength after light splitting in detail, therefore, it is possible to distinguish the difference of color in detail, the difference based on color can carry out the identification of bank note S accurately.Equally, also can distinguish the difference of iridescent in above-mentioned fluorescence spectrophotometer image in detail, the difference based on color can carry out the identification of bank note S accurately.And then, by combining the identification of the identification based on the bank note S of reflection beam splitting image and the bank note S based on fluorescence spectrophotometer image, the identification of more high-precision bank note S can be carried out.
As described above, in the optical sensor portion 14B of the paper money identifier 10B of the present embodiment, in once reading process when bank note S is transferred, by transport cycle is carried out timesharing, the reading of the reading of the reflection beam splitting image of bank note S and the fluorescence spectrophotometer image of bank note S can be carried out.Thus, same with paper money identifier in the past, the general identification of bank note S can be carried out based on the reflected image read, and by carrying out the identification of bank note S based on reflection beam splitting image, thus the difference of color can be distinguished in detail compared with paper money identifier in the past, and high-precision identification can be carried out.In addition, similarly to Example 1, distinguish the difference of color based on the fluorescence spectrophotometer image read in detail, the identification of bank note S can be carried out accurately.And then, and can carry out the information obtained from reflection beam splitting image combining from the information that fluorescence spectrophotometer image obtains and synthetically carry out the identification of bank note S, can more high-precision identification be carried out.
In addition, LED40, light-guiding mechanism 41 and light guiding lens 22 that the light source portion 21B of the present embodiment is configured to by sending white light irradiate white light to irradiation area DL, but also can be configured to the bottom surface 22b multiple LED sending white light being configured in light guiding lens 22 with array-like equally with the multiple LED23 sending ultraviolet light, irradiate white light via light guiding lens 22 to irradiation area DL.In addition, in this example, as light source, be illustrated for LED, but be not limited to LED, also can use various light source.
In addition, in the optical sensor portion 14B of the present embodiment, be illustrated for the reflective optics configuring light source portion 21B in the upper side identical with light accepting part 27 relative to transport path 11.But, also can be the projection optical system configuring light source portion 21B relative to transport path 11 in the lower side contrary with light accepting part 27.In addition, also can be the structure also possessing projection optical system except reflective optics.Such as, also can be the upper side or the lower side that the light source sending fluorescence are configured in transport path 11, the light source sending white light is configured in the upper side of transport path 11 and the structure of lower side.
In addition, the present invention is not limited to the above embodiments, and comprises various deformation example.Such as, the above embodiments are to illustrate understandable for the present invention and the embodiment described in detail, being not limited to the formation that must possess illustrated whole structure.In addition, also a part for the structure of certain embodiment can be replaced into the structure of other embodiments, in addition, also can add the structure of other embodiments to the structure of certain embodiment.
Claims (7)
1. a sheet paper identification device, identifies paper, it is characterized in that,
Possess:
Optical sensor portion; And
Identification part, carries out the identification of described paper;
Described optical sensor portion possesses:
Transport path, described paper is carried by along throughput direction;
Light source portion, for the described paper of movement on described transport path, irradiate having the light that makes the fluorescent material contained by described paper send the wavelength of the fluorescence irradiation light as the wire extended along the direction vertical with described throughput direction or band shape to described paper;
Optical splitter, by the illuminated portions incident of the described paper from illuminated described irradiation light and the fluorescence of wire along 1st direction vertical with described throughput direction, carry out light splitting along the 2nd direction vertical with described 1st direction;
Light accepting part, has multiple photo detector, and accepts from the light splitting light of the fluorescence of described optical splitter, described multiple photo detector along described 1st direction and described 2nd direction with grid-like arrangement; And
Signal processing part, exports the fluorescence spectrophotometer picture signal of the light splitting photophase of the described fluorescence accepted with described light accepting part;
The identification of described paper, based on the described fluorescence spectrophotometer picture signal exported from described optical sensor portion, is carried out in described identification part.
2. sheet paper identification device as claimed in claim 1, is characterized in that,
Described identification part is based on corresponding with the wavelength of regulation among described fluorescence spectrophotometer image and the light splitting wavelength graph picture of wire along described 1st direction, detect intensity and the color of the fluorescence sent from described illuminated part, and carry out the identification of described paper based on testing result.
3. sheet paper identification device as claimed in claim 1 or 2, is characterized in that,
The light splitting location drawing picture of the wire of described identification part based on corresponding with the assigned position in described 1st direction among described fluorescence spectrophotometer image and along described 2nd direction, detect intensity and point Light distribation of the fluorescence sent from the described assigned position of the illuminated part of described paper, and carry out the identification of described paper based on testing result.
4. sheet paper identification device as claimed in claim 1 or 2, is characterized in that,
Described identification part is combined by the light splitting wavelength graph picture of the wire of respective the comprised provision wavelengths of fluorescence spectrophotometer image obtained the region of each band shape by described paper, generate the image representing the described paper showed by the fluorescence of described provision wavelengths, and the identification of described paper is carried out based on the image generated, the region of each band shape of described paper is the region distinguished by often certain fed distance along described throughput direction.
5. sheet paper identification device as claimed in claim 1 or 2, is characterized in that,
Described light source portion has:
1st light source, sends the 1st light, and the 1st light has the wavelength making described fluorescent material send fluorescence; And
2nd light source, sends the 2nd light, and the 2nd light is non-fluorescence, and has the wavelength coverage of regulation;
Carry out timesharing during by conveying corresponding for the certain operational throughput with described paper and during the obtain the 1st in, described 1st light is mapped to described illuminated part as described irradiation illumination, exports described fluorescence spectrophotometer picture signal thus from described signal processing part,
Carry out timesharing during by described conveying and during the obtain the 2nd in, described 2nd light is mapped to described illuminated part as described irradiation illumination, light splitting is carried out thus by the non-fluorescence light of described optical splitter to the wire from described illuminated portions incident, accept the light splitting light from the described non-fluorescence of described optical splitter by described light accepting part, and export the non-fluorescence spectral image signal of the light splitting photophase of the described non-fluorescence accepted with described light accepting part from described signal processing part;
The identification of described paper, based on described fluorescence spectrophotometer picture signal and described non-fluorescence spectral image signal, is carried out in described identification part.
6. sheet paper identification device as claimed in claim 1 or 2, is characterized in that,
The shape of the Wavelength distribution of the fluorescence that described identification part shows based on the spectral image of the wire along described 2nd direction of described fluorescence spectrophotometer image, determines the fluorescent material sending fluorescence, and carries out the identification of described paper based on determination result.
7. an optical sensor arrangement, for identifying paper, is characterized in that, possessing:
Transport path, described paper is carried by along throughput direction;
Light source portion, for the described paper of movement on described transport path, irradiate having the light that makes the fluorescent material contained by described paper send the wavelength of the fluorescence irradiation light as the wire extended along the direction vertical with described throughput direction or band shape to described paper;
Optical splitter, by the illuminated portions incident of the described paper from illuminated described irradiation light and the fluorescence of wire along 1st direction vertical with described throughput direction, carry out light splitting along the 2nd direction vertical with described 1st direction;
Light accepting part, has multiple photo detector, and accepts from the light splitting light of the fluorescence of described optical splitter, described multiple photo detector along described 1st direction and described 2nd direction with grid-like arrangement; And
Signal processing part, exports the fluorescence spectrophotometer picture signal of the light splitting photophase of the described fluorescence accepted with described light accepting part.
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| JP2013-116737 | 2013-06-03 | ||
| JP2013116737A JP6009992B2 (en) | 2013-06-03 | 2013-06-03 | Paper sheet identification device and optical sensor device |
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| CN104215613B CN104215613B (en) | 2017-12-15 |
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Cited By (2)
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| CN110678907A (en) * | 2017-05-26 | 2020-01-10 | 凸版印刷株式会社 | Recognition device, recognition method, and recognition program |
| CN112229441A (en) * | 2020-09-10 | 2021-01-15 | 西安工程大学 | Automatic paper sorting device |
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| JP2017010149A (en) * | 2015-06-18 | 2017-01-12 | 沖電気工業株式会社 | Medium processing device and automatic transaction device |
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Also Published As
| Publication number | Publication date |
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| JP2014235577A (en) | 2014-12-15 |
| CN104215613B (en) | 2017-12-15 |
| JP6009992B2 (en) | 2016-10-19 |
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Address after: Tokyo, Japan Patentee after: Hitachi Financial Systems Co.,Ltd. Address before: Tokyo, Japan Patentee before: HITACHI-OMRON TERMINAL SOLUTIONS, Corp. |