Technical field
[0001]
The technology disclosed herein relates to a paper sheet identification apparatus that performs identification of the paper sheet such as a bill.
BACKGROUND
[0002]
Patent Document 1, the sheet being conveyed is irradiated with light alternately from the two light sources are irradiated in different directions, the apparatus configuration to obtain the two images captured are disclosed in the respective timings. In this apparatus, and an image obtained by adding two images acquired based on, a determination of authenticity and denomination of the paper sheet, also based on an image obtained by subtracting one image from one image to to, a determination is made of the state of the wrinkles of the paper sheet.
CITATION
Patent Document
[0003]
Patent Document 1: U.S. Patent No. 7,742,154
Summary of the Invention
Problems that the Invention is to Solve
[0004]
　In conventional paper sheet recognition apparatus, the line sensor unit, the sheet being conveyed, and is configured to acquire together with transmitted light image and the both sides of the reflected light image. In other words, one operation cycle is composed of a plurality of phases, each phase, switches and a light sensor to operate the light emitting portion to emit light. The operating cycle, by repeatedly executing a plurality of times during the conveyance of the paper sheet, obtains the image data constituting various images.
[0005]
　In such a configuration, for example, to determine the state of wrinkles of the paper sheet, and obtains a difference reflected light image as shown in Patent Document 1. In this case, underlying generation of the differential reflected light image, since the irradiation direction to get one of two images captured respectively by irradiating light from two different light sources, the phase for the same, and operation cycles new it is necessary to add.
[0006]
　However, in this case, 1 because the operation time per cycle is long, in order to obtain various images with a conventional level of resolution, you need to take longer detection time occurs. Further, it is necessary to drop the conveying speed. This is not preferable in terms of processing capability of the paper sheet recognition apparatus.
[0007]
　The disclosed technique has been made in view of the above, the paper sheet recognition apparatus, without decreasing the growth and the conveying speed of the detection time, that you can generate a differential reflected light image for the purpose.
Means for Solving the Problems
[0008]
　The technology disclosed herein is a paper sheet recognition apparatus for identifying sheet, a conveying path for conveying the paper sheet, the conveyance path, on the side of one surface of the sheet being conveyed provided, the first sensor unit for detecting the first identification zone of the conveying path, the conveying path is provided on the side of the other surface of the sheet being conveyed, the conveying path comprising a second sensor unit for detecting the second identification zone, and a sensor control unit for controlling the operation of said first and second sensor unit. Wherein the first sensor unit, relative to the first identification zones, light is irradiated from different directions, and the first and second light emitting portion, in the first identification zones, detecting the reflected light of the paper sheet a first optical sensor, to said second identification zone, and a third light emitting unit for emitting light, the second sensor unit, in the second identification zone, detects the light transmitted through the paper sheet a second optical sensor, the sensor control unit, the operation of the first and second sensor unit is controlled in a plurality of phases. Then, the plurality of phases, by irradiating light to the first light emitting portion, not to irradiate light to the second light emitting section, a first phase for performing reflected light detected by said first optical sensor, the first not to irradiate light to the first light-emitting portion, by irradiating light to the second light emitting portion, and a second phase of performing the reflected light detected by said first optical sensor, at least one of the first and second phases in either, the third by irradiating light to the light emitting unit, performs the transmitted light detected by said second optical sensor.
[0009]
　According to this configuration, one of the first and second light emitting portion of the first sensor unit is irradiated with light, the first light sensor of the first and second phase detecting reflected light of the sheet in either is small and the third light emitting portion of the first sensor unit is irradiated with light, the second light sensor of the second sensor unit detects the light transmitted through the sheet. Accordingly, it is required to generate the differential reflected light image for identification such as wrinkles state, the reflected light detection of one irradiation can be performed at the same timing as the transmitted light detection. Therefore, without causing an increase in detection time, also suppressed decrease in the conveying speed.
[0010]
　In the configuration above, the third light emitting unit is capable of irradiating a plurality of different wavelengths of light, the sensor control unit, in the first phase and the second phase, the third light emitting portion , was irradiated with light of different wavelengths, it performs the transmitted light detected by the second optical sensor may be.
[0011]
　Thus, in the first and second phases to perform reflected light detection side irradiation, such as that infrared light and visible light, it is possible wavelengths respectively detect different transmitted light.
[0012]
　In the configuration above, the output of the first and second sensor unit includes an image data generating unit that generates an image of the paper sheet, the image data generating unit, the in the first phase first to generate a first reflected light image from the output of the sensor section, from said output of said first sensor unit in the second phase to produce a second reflected light image, the second reflecting and generated the first reflected light image from the difference between the light image to generate a differential reflected light image may be.
[0013]
　Accordingly, the generated first and second reflected light image from the output of the first sensor unit in the first and second phases, respectively, by the image data generating unit, the first reflected light image and the difference between the second reflected light image from the differential reflected light image for identification such as wrinkles state is generated.
[0014]
　In the configuration above, the second sensor unit, to said second identification zone is irradiated with light from different irradiation directions, further comprising a fourth and fifth light-emitting portion, wherein the plurality of phases, the by irradiating light to both the first and second light emitting unit, performs the reflected light detected by said first optical sensor, by irradiating light to both of the fourth and fifth light-emitting portion, the second light a third phase for performing reflected light detected by the sensor may be.
[0015]
　Thus, it is possible in the third phase, detecting reflected light of both surfaces of the sheet.
[0016]
　In the configuration above, the first and second light emitting unit has the light guide body extending in the main scanning direction of the first optical sensor, and a light emitting body provided at both ends of the light guide, respectively are arranged in parallel, it may be.
[0017]
　Thus, the light emitting unit for irradiating light evenly in the main scanning direction of the first optical sensor, a simple configuration can be realized.
[0018]
　In the configuration above, the first and second light emitting unit has the light guide body extending in the main scanning direction of the first optical sensor, and a light emitting body provided at one end of the light guide, respectively are arranged in parallel, and the light emitter is provided at one end of the same side of the light guide may be.
[0019]
　Thus, the light emitting unit for irradiating light evenly in the main scanning direction of the first optical sensor, a simple structure, and, in the light emitting element of small number, it can be realized. Further, it is possible to obtain a difference infrared image clearly.
[0020]
　In the configuration above, the first and second light emitting unit has the light guide body extending in the main scanning direction of the first optical sensor, and a light emitting body provided at one end of the light guide, respectively are arranged in parallel, and the light emitter is provided on the opposite side of the one end of the light guide may be.
[0021]
　Thus, the light emitting unit for irradiating light evenly in the main scanning direction of the first optical sensor, a simple structure, and, in the light emitting element of small number, it can be realized. In addition, even if the spatial constraints on the installation location, it is possible to cope.
[0022]
　In the configuration above, includes a light emitting circuit which controls the emission timing and the light quantity of the first and second light emitting portion, the light-emitting circuit, to irradiate light to the first light emitting portion, the second light emitting portion when not irradiated with light, and a first circuit for driving the first light emitting portion, not to irradiate light to the first light emitting portion, when for irradiating light to the second light emitting unit, driving the second light emitting portion a second circuit for the being configured separately from the first and second circuits, when for irradiating light to both of the first and second light emitting portion to drive the first and second light emitting portion and a third circuit may be.
[0023]
　Thus, if for emitting either one of the first and second light emitting portion, when driven by the first or the second circuit to emit both the first and second light emitting portion, first and second are constructed separately from the circuit, it is driven by the third circuit. Therefore, it is possible to appropriately set the amount in each case. For example, if the light is emitted either one of the first and second light emitting unit increases the amount of light, if the light emission of both first and second light emitting portion is without drastic respective light quantity, it can be controlled such as Become.
[0024]
　In the configuration above, the first and second light emitting portion, in the first and second phase, irradiation with infrared light, may be.
[0025]
　Thus, by using the infrared light, it is possible to suppress the contamination impact of the paper sheet in the detection of such wrinkles. Also, if the pattern disappears infrared light to the paper sheet is printed, it is also possible to reduce the influence of the pattern of the paper sheet.
[0026]
　In the configuration above, the paper sheet is, for example, bills.
[0027]
　Also, the technology disclosed herein, the paper sheet recognition apparatus, a method for identifying a paper sheet. The paper sheet recognition apparatus, a conveying path for conveying the paper sheet is provided on the side of one surface of the sheet being conveyed, first performing the detection in the first identification zone of the conveying path comprising a sensor unit, of the conveying path, it is provided on the side of the other surface of the sheet being conveyed, and a second sensor unit for detecting the second identification zone of the conveying path. Wherein the first sensor unit, relative to the first identification zones, light is irradiated from different illumination directions, the first and second light emitting portion, in the first identification zones, the reflected light from the paper sheet a first optical sensor for detecting, with respect to the second identification zone, and a third light emitting unit for emitting light, the second sensor unit, in the second identification zones, the light transmitted through the paper sheet a second light sensor which detects. Then, the method by irradiating light to the first light emitting portion, not to irradiate light to the second light emitting portion, a first step of performing a reflected light detected by said first optical sensor, the first light emitting not to irradiate light to the part, by irradiating light to the second light emitting portion, a second step of performing a reflected light detected by said first optical sensor, at least either of the first and second step on the other hand DOO at the same timing, the third by irradiating light to the light emitting portion, and a third step of performing the transmitted light detected by said second optical sensor.
[0028]
　According to this configuration, one of the first and second light emitting portion of the first sensor unit is irradiated with light, the first light sensor of the first and second step of detecting the reflected light of the sheet , less at the same timing as either, the third light emitting portion of the first sensor unit is irradiated with light, the second light sensor of the second sensor unit detects the light transmitted through the sheet. Accordingly, it is required to generate the differential reflected light image for identification such as wrinkles state, the reflected light detection of one irradiation can be performed at the same timing as the transmitted light detection. Therefore, without causing an increase in detection time, also suppressed decrease in the conveying speed.
Effect of the invention
[0029]
　According to the present disclosure, may be in the paper sheet recognition apparatus, without decreasing the growth and the conveying speed of the detection time, to generate a differential reflected light image.
BRIEF DESCRIPTION OF THE DRAWINGS
[0030]
[1] Configuration example of the line sensor unit in the paper sheet recognition apparatus
[FIG. 2] (a) ~ (d ) are configuration examples of a light emitting portion
[3] a block diagram showing the main configuration of a paper-sheet recognition apparatus
[ 4] timing chart showing an operation example of the line sensor unit
timing chart showing an operation example of FIG. 5 line sensor unit
configuration example of a light emitting circuit which controls light emission timing and amount of [6] emitting portion
DESCRIPTION OF THE INVENTION
[0031]
　Hereinafter, the paper sheet recognition apparatus according to the embodiment will be described with reference to the drawings. Incidentally, an example of the paper sheet is the banknote, the paper sheet recognition apparatus described below identify, for example, banknotes of denomination, authenticity, fitness, extent of wrinkles. In addition to the bill, it is possible to carry out checks, bills, also identification, such as a gift certificate.
[0032]
　Figure 1 shows an example of the configuration of the line sensor unit 10 in the paper sheet recognition apparatus according to the embodiment. In the configuration of FIG. 1, the sheet BL is one by one transport path 50, the paper is transported from the drawing right to left in a horizontal state. Incidentally, FIG. 1, without the vertical to the plane of the paper sheet BL, and shows a cross-sectional view taken along a plane parallel to the conveying direction of the sheet BL.
[0033]
　As shown in FIG. 1, the line sensor unit 10 includes a first sensor unit 20 provided on (as a B-side are) one surface side of the sheet BL, the other surface (A surface of the paper sheet BL and a second sensor unit 30 provided with to have) side. A first sensor unit 20 and the second sensor unit 30 is disposed so as to sandwich the conveying path 50. In FIG. 1, the first sensor unit 20 on the lower side of the conveying path 50, the second sensor unit 30 on the upper side of the transport path 50, are disposed respectively, not intended positional relationship is not limited thereto it may be disposed upside down. Further, for example, if the conveying path 50 are arranged in the vertical direction, on the left and right of the conveying path 50 may be arranged between the first sensor unit 20 and the second sensor unit 30.
[0034]
　The first sensor unit 20, which performs detection in the identification zone Z1 of the conveying path 50 (first identification zones), the light sensor 21 (first optical sensor), the light emitting portion 22a, 22b (first and second light emitting parts), a condenser lens 23, the light emitting portion 24 (third light-emitting portion), the light sensor substrate 25, and includes a transparent member 26 made of transparent glass or resin. The second sensor unit 30, which performs detection in the identification zone Z2 of the conveying path 50 (second identification zones), the light sensor 31 (second optical sensor), the light emitting portion 32a, 32 b (the fourth and fifth light-emitting parts), a condenser lens 33, the light sensor substrate 35, and includes a transparent member 36 made of transparent glass or resin.
[0035]
　In the first sensor unit 20, the light emitting unit 22a, 22b is to identify the zone Z1, light is irradiated from different directions. Here, with respect to the paper surface of the paper sheet BL is conveyed, the light emitting portion 22a irradiates light diagonally rearward, the light emitting unit 22b is obliquely forward irradiation with light. Light sensor 21, in the identification zone Z1, to detect the reflected light of the sheet BL. That is, the light emitting portion 22a, the light emitted from 22b, is irradiated through the transparent member 26 to the paper sheet BL, the light reflected from the sheet BL is condensed by the condenser lens 23, optical sensor 21 It is detected by. Further, the light emitting unit 24 to identify the zone Z2, is irradiated with light. Here, the light emitting unit 24 emits light in a direction perpendicular to the paper surface of the paper sheet BL to be carried.
[0036]
　In the second sensor unit 30, the optical sensor 31, in the identification zone Z2, it detects the light transmitted through the sheet BL. That is, the optical sensor 31 may be light-emitting portion 24 of the first sensor unit 20 is irradiated to detect the light transmitted through the sheet BL. Further, the light emitting unit 32a, 32b is to identify the zone Z2, light is irradiated from different directions. Here, with respect to the paper surface of the paper sheet BL is conveyed, the light emitting unit 32a irradiates light diagonally rearward, the light emitting unit 32b obliquely forward irradiation with light. Light sensor 31, in the identification zone Z2, also detects reflected light of the sheet BL. That is, the light emitting portion 32a, the light emitted from 32b, is irradiated through the transparent member 36 to the paper sheet BL, the light reflected from the sheet BL is condensed by the condenser lens 33, optical sensor 31 It is detected by.
[0037]
　Light sensor 21 and 31 is a line sensor, the direction (direction forming an perpendicular to the plane of FIG. 1) forming the conveying direction and vertical parallel to and sheet BL and the plane of the sheet BL, the main scanning direction to. In the main scanning direction, for example, about 1,600 pixels units are arranged in a line shape. Further, the light emitting portion 22a, 22b, 24,32a, 32b is configured so as to extend in the same direction as the main scanning direction of the optical sensors 21 and 31. Here, the light emitting portion 22a, 22b, 24,32a, 32b, for example a green visible light, the light of two wavelengths of infrared light, it is assumed that can emit.
[0038]
　Figure 2 (a) is a schematic plan view showing a configuration example of a light emitting portion 22a, 22b. In the example of FIG. 2 (a), the light emitting portion 22a, 22b are arranged in parallel. The light emitting unit 22a includes a light guide body 41 extending in the main scanning direction of the optical sensor 21, and a light emitter 42, 43 provided at both ends of the light guide 41, the light emitting unit 22b of the optical sensor 21 having a light guide body 44 extending in the main scanning direction, and a light emitting member 45, 46 provided at both ends of the light guide 44. Emitters 42,43,45,46 is for example, an LED is provided as a light source, as shown by the arrows in the figure, light is irradiated towards the light guide 41 and 44. Thus, the light guide 41 and 44, light emitters 42,43,45,46 are evenly emit light at a wavelength of light irradiated.
[0039]
　Incidentally, as shown in FIG. 2 (b), one end of the light guide 41 and 44, may be provided a light emitter 42, 45. In this case, the light emitting portion 22a, 22b forming a pair, on the same side end of the light guide 41 and 44, preferably provided with light emitters 42 and 45. This allows the differential infrared light image will be described later, to obtain more clearly. Further, for example, from the spatial conditions of the installation site, as shown in FIG. 2 (c), (d), the opposite end of the light guide 41 and 44, emitters 42 and 45, or light emitters 42 , be provided with a 46, it is possible to obtain a difference infrared light image. Further, the light emitting portion 22a, 22b, for example in addition to this, it may be an LED array. Other light emitting portion 24,32A, for also 32b, the light emitting portion 22a, may be configured in the same manner as 22b.
[0040]
　Figure 3 is a block diagram showing the main configuration of a sheet identifying apparatus according to the embodiment. Paper sheet recognition apparatus 100 includes a line sensor section 10 shown in FIG. 1, a control unit 110 for controlling the entire paper sheet recognition apparatus 100, a storage unit 140 for storing image data or the like acquired by the line sensor unit 10 It is equipped with a door.
[0041]
　In the control unit 110, the sensor control unit 120 is for controlling the operation of the line sensor unit 10, and a light source control unit 121 and the AFE controller 122. The light source control unit 120 performs light emission portion 22a provided in the line sensor unit 10, 22b, 24,32a, the control of turning on and off of 32b of the light source. AFE control unit 122 performs relative AFE having the line sensor unit 10 (Analog Front End) (not shown), offset adjustment, sampling configuration of the input signal, the data acquisition timing control, data output setting and the like.
[0042]
　Image data generating unit 130 generates various image data from the output of the line sensor unit 10, and stores in the storage unit 140. Image data generation unit 130 from the output of the first sensor unit 20, as a B plane image data 150, and generates a visible light image data 151 and the infrared light image data 152. Visible light image data 151, the light emitting portion 22a, 22b is generated from the output signal of the optical sensor 21 when the light emitting visible light, infrared light image data 152, the light emitting portion 22a, 22b is emitted infrared light It is generated from the output signal of the optical sensor 21 when. Further, the image data generation unit 130, the light emitting portion 22a emits infrared light, generates an infrared light image data 153 from the output signal of the optical sensor 21 when the light emitting portion 22b does not emit light (first reflected light image) and, the light emitting portion 22a is not emit light, the light emitting unit 22b generates an infrared light image data 154 (second reflected light image) from the output signal of the optical sensor 21 when the light emitting infrared light. Then, generated from the difference between the infrared image data 153 and 154, differential infrared light image data 155 (difference reflected light image).
[0043]
　The image data generation unit 130 from the output of the second sensor unit 30, as the A face image data 160, and generates a visible light image data 161 and the infrared light image data 162. Visible light image data 161, the light emitting portion 32a, 32b is generated from the output signal of the optical sensor 31 when the light emitting visible light, infrared light image data 162, the light emitting portion 32a, 32b is emitted infrared light It is generated from the output signal of the optical sensor 31 when. The image data generation unit 130 from the output of the second sensor unit 30, as a transparent image data 170, and generates a visible light image data 171 and the infrared light image data 172. Visible light image data 171, the light emitting portion 24 of the first sensor unit 20 is generated from the output signal of the optical sensor 31 when the light emitting visible light, infrared light image data 172, the light emitting unit 24 is an infrared light It is generated from the output signal of the optical sensor 31 when the light emission.
[0044]
　Here, using a visible light image data 151,161,171 and the infrared image data 152,162,172, identification such as type and authenticity of the sheet BL is performed. Also, using the difference infrared image data 155, it is possible to detect the degree of wrinkling and folding of the paper sheet BL. That is, the light emitting portion 32a of the irradiation direction different from each other, by irradiating 32b by one, respectively to generate a reflected light image, by taking these differences, the image pattern having the sheet BL canceled, paper of the kind BL wrinkles and broken are emphasized appear in the image. Thus, using the difference infrared image data 155, it is possible to detect the degree of wrinkling and folding of the paper sheet BL. It should be noted that, by the use of infrared light, it is possible to suppress the effect of the dirt of the paper sheet BL. Depending on the type of the paper sheet BL, since the pattern disappears in infrared light some are printed, by using the infrared light, wrinkles or bending in image effect pattern of the paper sheet BL is reduced some may be able to detect.
[0045]
　4 and 5 are timing charts illustrating an operation example of the line sensor unit 10 in this embodiment. The line sensor unit 10, the paper sheet BL is when conveyed on the conveying path 50, to perform a plurality of cycles repeated operations shown in FIGS. MCLK is a mechanical clock of the paper sheet recognition apparatus 100. A surface reading is an operation of the second sensor unit 30, B face reading is an operation of the first sensor unit 20.
[0046]
　In the example of FIG. 4, wherein one cycle of two cycles of the mechanical clock MCLK, running operation by dividing one cycle into six phases. In phase 1, the light emitting portion 22a is irradiated with infrared light, in the light emitting portion 22b is not irradiated with light, the light sensor 21 performs reflected light detection of the sheet BL (B side reading: reflecting infrared 1). The light emitting unit 24 is irradiated with infrared light, the light sensor 31 performs the transmitted light detection of the sheet BL (A plane reading: transmitting infrared). In phase 2, the light emitting portion 22a is not irradiated with light, the light emitting unit 22b is irradiated with infrared light, the light sensor 21 performs reflected light detection of the sheet BL (B side reading: reflecting infrared 2) . The light emitting unit 24 is irradiated with visible light, the light sensor 31 performs the transmitted light detection of the sheet BL (A plane reading: transmitting visible).
[0047]
　In phase 3, the light emitting unit 22a, 22b is irradiated with visible light, the light sensor 21 performs reflected light detection of the sheet BL (B side reading: reflection visible). Further, the light emitting unit 32a, 32b is irradiated with visible light, the light sensor 31 performs reflected light detection of the sheet BL (A plane reading: reflection visible). In phase 4, the light emitting unit 22a, 22b is irradiated with infrared light, the light sensor 21 performs reflected light detection of the sheet BL (B side reading: reflecting infrared 1 + 2). Further, the light emitting unit 32a, 32b is irradiated with infrared light, the light sensor 31 performs reflected light detection of the sheet BL (A plane reading: reflecting infrared). In Phase 5, it does not operate. In phase 6, the same operation as the phase 3.
[0048]
　Such behavior, in one cycle, the A surface reflected light image and B-side reflected light image of the visible light, to get the image data for two lines, A surface reflected light image of the infrared light and the B-side reflected light images, and for transmitting an image of the infrared light and visible light, it is possible to acquire the image data of one line. Further, in Phase 1 and Phase 2 is required to generate the differential reflected light image, the two B-reflection light image on one side irradiation, it is possible to acquire the image data of each one line.
[0049]
　Here, in phase 2, with B surface reflected light on one side irradiation is detected by the first sensor unit 20, the transmitted light is detected by the second sensor unit 30. In other words, in order to obtain a B-reflection light image on one side irradiation, have been used phase to obtain a transmitted light image, there is no need to add a new phase. Accordingly, without increasing the detection time, also, without reducing the accuracy of the other of the transmitted light image or a reflected-light image, it is possible to generate a differential reflected light image for wrinkle detection.
[0050]
　In the example of FIG. 5, wherein one cycle of three cycles of the mechanical clock MCLK, running operation by dividing one cycle into six phases. In phase 1, the light emitting portion 22a is irradiated with infrared light, in the light emitting portion 22b is not irradiated with light, the light sensor 21 performs reflected light detection of the sheet BL (B side reading: reflecting infrared 1). The light emitting unit 24 is irradiated with infrared light, the light sensor 31 performs the transmitted light detection of the sheet BL (A plane reading: transmitting infrared). In phase 2, the light emitting unit 22a, 22b is irradiated with visible light, the light sensor 21 performs reflected light detection of the sheet BL (B side reading: reflection visible). Further, the light emitting unit 32a, 32b is irradiated with visible light, the light sensor 31 performs reflected light detection of the sheet BL (A plane reading: reflection visible). In phase 3, the light emitting portion 22a is not irradiated with light, the light emitting unit 22b is irradiated with infrared light, the light sensor 21 performs reflected light detection of the sheet BL (B side reading: reflecting infrared 2) . The light emitting unit 24 is irradiated with visible light, the light sensor 31 performs the transmitted light detection of the sheet BL (A plane reading: transmitting visible).
[0051]
　In phase 4, the same operation as the phase 2. In phase 5, the light emitting unit 22a, 22b is irradiated with infrared light, the light sensor 21 performs reflected light detection of the sheet BL (B side reading: reflecting infrared 1 + 2). Further, the light emitting unit 32a, 32b is irradiated with infrared light, the light sensor 31 performs reflected light detection of the sheet BL (A plane reading: reflecting infrared). In phase 6, the same operation as the phase 2.
[0052]
　Such behavior, in one cycle, the A surface reflected light image and B-side reflected light image of the visible light, to get the image data of three lines, A surface reflected light image of the infrared light and the B-side reflected light images, and for transmitting an image of the infrared light and visible light, it is possible to acquire the image data of one line. Further, in Phase 1 and Phase 3, is required to generate the differential reflected light image, the two B-reflection light image on one side irradiation, it is possible to acquire the image data of each one line.
[0053]
　Here, in phase 1 and 3, together with the B-side reflected light on one side irradiation is detected by the first sensor unit 20, the transmitted light is detected by the second sensor unit 30. In other words, in order to obtain a B-reflection light image on one side irradiation, have been used phase to obtain a transmitted light image, there is no need to add a new phase. Accordingly, without increasing the detection time, also, without reducing the accuracy of the other of the transmitted light image or a reflected-light image, it is possible to generate a differential reflected light image for wrinkle detection.
[0054]
　As described above, according to this embodiment, the light emitting portion 22a of the first sensor unit 20, one of 22b is irradiated with light, the phase of the optical sensor 21 detects the reflected light of the sheet BL, emitting portion 24 of the first sensor unit 20 is irradiated with light, the light sensor 31 of the second sensor unit 30 detects the light transmitted through the sheet BL. Accordingly, it is required to generate the differential reflected light image for identification such as wrinkles state, the reflected light detection of one irradiation can be performed at the same timing as the transmitted light detection. Therefore, without causing an increase in detection time, also suppressed decrease in the conveying speed.
[0055]
　The operation example in FIG. 4 and FIG. 5 is an example, not limited thereto, in order to obtain a reflected light image of one irradiation, the joint use of such a phase for acquiring the transmitted light image, this embodiment the same effect as embodiment can be obtained. Also, for any one of the acquisition of the reflected light image of one side irradiation alone, it may be used phase to obtain a transmitted light image. Further, in the operation example of FIG. 4, in two phases to obtain a reflected light image of one side irradiation, and changing the wavelength of light of the transmitted light image to be acquired. For example, in the operation example of FIG. 4, phase 1, it acquires the transmitted light image of the infrared light, has obtained a transmitted light image of the Phase 2 visible light. Thus, a variety of images to be used for the identification of the paper sheet, can be efficiently acquired.
[0056]
　6 shows an example of the configuration of the light emitting circuit 60. Emitting circuit 60, in accordance with the instruction signal from the light source control unit 121, the light emitting portion 22a of the first sensor unit 20, controls the light emission timing and amount of 22b. 71 is LED, 72 is an example of a light source of the light emitting portion 22a is a LED which is an example of a light source of the light emitting portion 22b. Emitting circuit 60 includes a constant current circuit 61,63a for driving the LED 71, and a constant current circuit 62,63b for driving the LED 72. Constant current circuit 61 is operated by the ON signal ON1. The constant current circuit 62 is operated by the ON signal ON2. Constant current circuit 63a, 63b is operated simultaneously by the ON signal ONB. The light emitting circuit 60 includes a current setting unit 65 for sending a setting signal for setting the LED current. Current setting unit 65 sends setting signals S1 to the constant current circuit 61 sends a setting signal S2 to the constant current circuit 62 sends a setting signal SB to the constant current circuit 63a, 63 b.
[0057]
　Constant current circuit 61 as a first circuit, is irradiated with light from the light emitting portion 22a, when the light emitting portion 22b not irradiated with light, operated by the ON signal ON1, a current having a current value corresponding to the set signal S1 to LED71 flow. The constant current circuit 62 as the second circuit is not allowed to irradiate the light from the light emitting portion 22a, when to irradiate the light from the light emitting unit 22b, operated by the ON signal ON2, the current having a current value corresponding to the set signal S2 LED 72 flowing in. The constant current circuit 63a of the third circuit, 63 b, the light emitting portion 22a, when to irradiate light from both 22b, operated by the ON signal ONB, electric current having a current value corresponding to the setting signal SB to LED71,72 . Then, the constant current circuit 63a, 63b are separately constituted from the constant current circuits 61 and 62.
[0058]
　Thus, the light emitting portion 22a, a case of emitting both 22b, in a case of emitting either by separate circuits, by driving the light source, appropriately set to the amount of light in each case It becomes possible. For example, if the light is emitted either light emitting portion 22a, 22b of the raised intensity of the light source, the light emitting portion 22a, the case of emitting both 22b, to slightly suppress the light amount of each light source, the control such that possible to become.
DESCRIPTION OF SYMBOLS
[0059]
10 line sensor unit
20 first sensor unit
21 first optical sensor
22a first light emitting portion
22b second light emitting portion
24 third light emitting portion
30 and the second sensor unit
31 the second optical sensor
32a fourth light emitting portion
32b fifth light emitting portion
41 , 44 light guide
42,43,45,46 light emitter
50 conveying path
60 the light emitting circuit
61 a constant current circuit (first
circuit) 62 a constant current circuit (second
circuit) 63a, 63 b the constant current circuit (3
circuit) 120 sensor control unit
130 image data generating unit
BL sheet
first identification zones Z1
Z2 second identification zone

The scope of the claims
[Requested item 1]
　A paper sheet recognition apparatus for identifying sheet,
　a conveying path for conveying the paper sheet,
　the conveyance path is provided on the side of one surface of the sheet being conveyed, the conveying a first sensor unit for detecting the first identification zone of the road,
　the transport path is provided on the side of the other surface of the sheet being conveyed, the detection in the second identification zone of the conveying path a second sensor unit for performing,
　and a first and a sensor control unit which controls the operation of the second sensor unit,
　the first sensor unit,
　relative to the first identification zones, light is irradiated from different directions first and second light emitting portion,
　in the first identification zones, a first optical sensor for detecting the reflected light of the paper sheet,
　to said second identification zone, and a third light emitting portion for emitting light comprising a
　second sensor unit,
　in the second identification zones, the paper sheet A second optical sensor for detecting the transmitted light,
　the sensor control unit, the operation of the first and second sensor unit is designed to control in a plurality of phases,
　the plurality of phases,
　the first 1 by irradiating light to the light emitting portion, not to irradiate light to the second light emitting section, a first phase for performing reflected light detected by said first optical sensor,
　not to irradiate light to the first light emitting portion, by irradiating light to the second light emitting portion, and a second phase of performing the reflected light detected by said first optical sensor,
　in at least one of said first and second phase, the third light emitting portion the by irradiation with light, it performs the transmitted light detected by said second optical sensor
paper sheet recognition apparatus.
[Requested item 2]
　The third light emitting unit is capable of irradiating a plurality of different wavelengths of light,
　the sensor control unit, in the first phase and the second phase, the third light emitting portion, the light of different wavelengths is irradiated, it performs the transmitted light detected by said second optical sensor
sheet identifying apparatus according to claim 1, characterized in that.
[Requested item 3]
　From an output of the first and second sensor unit includes an image data generating unit that generates an image of the paper sheet,
　the image data generation unit, first from the output of the first sensor unit in the first phase to generate a reflected light image from the difference between the first to generate a second reflected light image from the output of the sensor unit, and generated the first reflected light image and the second reflected light image in the second phase, generating a differential reflected light image
sheet identifying apparatus according to claim 1 or 2, characterized in that.
[Requested item 4]
　The second sensor unit,
　to said second identification zone is irradiated with light from different irradiation directions, further comprising a fourth and fifth light-emitting portion,
　wherein the plurality of phases,
　the first and second light emitting portion both by irradiating light, performs reflected light detected by said first optical sensor, the fourth and fifth by irradiating light to both the light emitting unit, performs the reflected light detected by the second optical sensor a third phase
sheet identifying apparatus according to any one of claims 1 to 3, wherein the.
[Requested item 5]
　It said first and second light emitting unit has the light guide body extending in the main scanning direction of the first optical sensor, and a light emitting body provided at both ends of the light guide, respectively, are arranged in parallel
Bill discrimination apparatus according to any one of claims 1 to 4, wherein the.
[Requested item 6]
　Said first and second light emitting part, the light guide body extending in the main scanning direction of the first optical sensor, and a light emitting body provided at one end of the light guide, respectively, are arranged in parallel and the light emitter is provided at one end of the same side of the light guide
sheet identifying apparatus according to any one of claims 1 to 4, wherein the.
[Requested item 7]
　Said first and second light emitting part, the light guide body extending in the main scanning direction of the first optical sensor, and a light emitting body provided at one end of the light guide, respectively, are arranged in parallel and the light emitter is provided on the opposite side of the one end of the light guide
sheet identifying apparatus according to any one of claims 1 to 4, wherein the.
[Requested item 8]
　A light-emitting circuit which controls the emission timing and the light quantity of the first and second light emitting portion,
　the light-emitting circuit,
　when the first light emitting portion is irradiated with light, does not irradiate light to the second light emitting portion, wherein a first circuit for driving the first light emitting portion,
　not to irradiate light to the first light emitting portion, when for irradiating light to the second light emitting portion, and a second circuit for driving the second light emitting portion,
　wherein the first and second circuits are configured separately, when for irradiating light to both of the first and second light emitting portion, and a third circuit for driving the first and second light emitting portion
bill discrimination apparatus according to any one of claims 1 to 6, wherein the.
[Requested item 9]
　Said first and second light emitting portion, in the first and second phase, irradiation with infrared light
sheet identifying apparatus according to any one of claims 1 to 8, wherein the.
[Requested item 10]
　The paper sheet is a banknote
paper sheet identification device according to any one of claims 1 to 9, characterized in that.
[Requested item 11]
　In the paper sheet recognition apparatus, a method for identifying a paper sheet,
　the paper sheet recognition apparatus,
　a conveying path for conveying the sheet, provided on the side of one surface of the sheet being conveyed It is and, a first sensor unit for detecting the first identification zone of the conveying path,
　the conveying path is provided on the side of the other surface of the paper sheet being conveyed, the said conveying path and a second sensor unit for detecting the second identification zones,
　the first sensor unit,
　relative to the first identification zones, light is irradiated from different illumination directions, the first and second light emitting portion,
　wherein in the first identification zones, a first optical sensor for detecting reflected light from the paper sheet,
　to said second identification zone, and a third light emitting unit for emitting light,
　the second sensor unit,
　in the second identification zone, a second light sensor which detects the light transmitted through the paper sheet Comprising a,
　the method
　by irradiating light to the first light emitting portion, not to irradiate light to the second light emitting portion, a first step of performing a reflected light detected by said first optical sensor,
　the first not to irradiate light to the light-emitting portion, by irradiating light to the second light emitting portion, a second step of performing a reflected light detected by said first optical sensor,
　at least one of said first and second step on the other hand and at the same time, the third by irradiating light to the light emitting unit, the third process and comprising a performing transmitted light detected by said second optical sensor
paper sheet recognition method.