WO2021117197A1

WO2021117197A1 - Paper-sheet identifying device, paper-sheet processing device, and paper-sheet identifying method

Info

Publication number: WO2021117197A1
Application number: PCT/JP2019/048763
Authority: WO
Inventors: 友彦糟谷; 良池本; 松本　英司; 松本　卓也
Original assignee: グローリー株式会社
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2021-06-17
Also published as: JP7300520B2; JPWO2021117197A1

Abstract

The present invention provides a paper-sheet identifying device, a paper-sheet processing device, and a paper-sheet identifying method that can accurately detect the thickness of a paper sheet being transported. The present invention is a paper-sheet identifying device for identifying a paper sheet being transported. The paper-sheet identifying device comprises: a mechanical thickness detection sensor that collects paper sheet thickness data, on the basis of a change in the distance between rollers mounted in a transport path along which a paper sheet is transported; a non-contact thickness detection sensor that collects paper sheet thickness data, on the basis of a change in electrostatic capacity between opposing electrodes mounted in the transport path; and an identifying unit that performs a process of identifying the paper sheet, on the basis of at least one of output data from the mechanical thickness detection sensor and output data from the non-contact thickness detection sensor.

Description

Paper leaf identification device, paper leaf processing device and paper leaf identification method

The present invention relates to a paper leaf identification device, a paper leaf processing device, and a paper leaf identification method. More specifically, the present invention relates to a paper leaf identification device, a paper leaf processing device, and a paper leaf identification method suitable for acquiring thickness data of paper sheets to be transported.

In the paper leaf identification device of the paper leaf processing device that performs deposit / withdrawal processing of banknotes, damage to banknotes such as tears, holes, etc., folds, wrinkles, and tape sticking can be detected. A thickness detection sensor is generally provided in order to detect a plurality of banknotes transported in an overlapping manner.

For example, in Patent Document 1, paper leafs are discriminated to determine whether or not a tape, a sticker, or the like is attached to the paper sheets to be transported, based on a change in capacitance between counter electrodes provided in the transport path. The device is disclosed.

On the other hand, Patent Document 2 describes a fixed reference roller, a detection roller that is in contact with the reference roller in a state where it can swing up and down, a leaf spring that is displaced up and down according to the displacement of the detection roller, and a leaf spring. A paper leaf thickness detecting device including a displacement sensor that detects the amount of displacement of the paper in a non-contact manner is disclosed.

Patent No. 3755798 Patent No. 2819162

However, the non-contact thickness detection sensor that uses the change in capacitance erroneously detects where metal objects such as holograms and threads are used, so it cannot correctly detect the thickness of paper sheets. ..

Further, in a mechanical thickness detection sensor using a change in the distance between rollers, it is usually difficult to detect the thickness of the front end portion of the paper leaves because the rollers are lifted when the paper leaves rush into the sensor. For example, if a tape is attached to this portion, it is difficult to detect the tape. In addition, the rollers may flutter when the paper sheets pass through (pull out) the mechanical thickness detection sensor, and an appropriate thickness change may not be detected. The improper behavior of the rollers of the mechanical thickness detection sensor during the entry and passage of such paper sheets is also called a kick.

The present invention has been made in view of the above situation, and provides a paper leaf identification device, a paper leaf processing device, and a paper leaf identification method capable of accurately detecting the thickness of paper sheets to be transported. The purpose is to do that.

In order to solve the above-mentioned problems and achieve the object, the present invention is a paper leaf identification device for identifying the paper leaves to be transported, and a roller provided in a transport path in which the paper leaves are transported. The thickness data of the paper sheets is collected by the change of the electrostatic capacity between the mechanical thickness detection sensor that collects the thickness data of the paper sheets by the change of the distance between them and the counter electrode provided in the transport path. It includes a non-contact thickness detection sensor and an identification unit that performs identification processing of paper sheets based on at least one of the output data of the mechanical thickness detection sensor and the output data of the non-contact thickness detection sensor. It is characterized by that.

Further, in the present invention, in the paper leaf identification device, in the storage unit for storing the sensor selection threshold and the output data of the mechanical thickness detection sensor, the front end portion of the paper leaf is placed on the roller. A noise amount determining unit that determines the front end kick amount, which is the amount of noise generated by collision, and the front end kick amount are compared with the sensor selection threshold, and are used for identification processing corresponding to the front end of paper sheets. Further, the thickness data includes a sensor output selection unit that executes a sensor selection process for selecting whether to use the output data of the mechanical thickness detection sensor or the output data of the non-contact thickness detection sensor. It is characterized by that.

Further, in the present invention, in the above invention, the sensor output selection unit performs identification processing corresponding to the entire region of paper sheets when the front end kick amount is within an allowable range with respect to the sensor selection threshold value. It is characterized in that the output data of the mechanical thickness detection sensor is selected as the thickness data for use.

Further, in the above invention, the sensor output selection unit is used for identification processing corresponding to the front end portion of paper sheets when the front end portion kick amount is not within an allowable range with respect to the sensor selection threshold. Select the output data of the non-contact thickness detection sensor as the data, and select the output data of the mechanical thickness detection sensor as the identification processing data corresponding to the central portion and the rear end portion of the paper sheets. It is a feature.

Further, in the present invention, in the above invention, the paper leaf identification device obtains the output data of the non-contact type thickness detection sensor and the output data of the mechanical thickness detection sensor selected by the sensor output selection unit. It is characterized by further including a data synthesis processing unit for synthesizing and generating identification processing data corresponding to the front end portion, the central portion and the rear end portion of the paper sheets.

Further, in the present invention, in the above invention, the noise amount determining unit is the amount of noise generated when the rear end portion of paper sheets passes through the roller in the output data of the mechanical thickness detection sensor. The sensor output selection unit further determines the part kick amount, and in the sensor selection process, the sensor output selection unit compares the rear end kick amount with the sensor selection threshold and identifies the data leaf corresponding to the rear end. It is characterized in that it is further selected whether to use the output data of the mechanical thickness detection sensor or the output data of the non-contact thickness detection sensor as the thickness data for use.

Further, in the present invention, the sensor output selection unit is of paper sheets when the front end kick amount and the rear end kick amount are within an allowable range with respect to the sensor selection threshold. It is characterized in that the output data of the mechanical thickness detection sensor is selected as the thickness data for identification processing corresponding to the entire area.

Further, in the present invention, the sensor output selection unit is used for paper sheets when the front end kick amount and the rear end kick amount are not within the permissible range with respect to the sensor selection threshold. The output data of the non-contact thickness detection sensor is selected as the identification processing data corresponding to the front end portion and the rear end portion, and the mechanical thickness detection sensor is used as the identification processing data corresponding to the central portion of the paper sheet. It is characterized by selecting the output data of.

Further, in the present invention, in the above invention, the paper leaf identification device is provided in the transport path, and an optical line sensor for collecting image data of the paper leaves and the paper leaves based on the image data. A type determination unit for determining the type and a metal determination unit for determining whether or not the paper sheet contains a metal portion based on the determination result by the type determination unit are further provided, and the paper sheet has a metal portion. When the metal determination unit determines that the inclusion is included, the sensor selection unit performs the sensor selection process.

Further, in the present invention, in the above invention, the paper leaf identification device is provided in the transport path, and an optical line sensor for collecting image data of the paper leaves and the paper leaves based on the image data. The type determination unit that determines the type, the metal determination unit that determines whether or not the paper sheets contain a metal portion based on the determination result by the type determination unit, and the above-mentioned that the paper sheets do not contain a metal portion. Further, a sensor output selection unit for selecting the output data of the non-contact type thickness detection sensor is further provided as the thickness data for identification processing corresponding to the entire region of the paper sheet when the determination is made by the metal determination unit. It is a feature.

Further, in the present invention, in the above invention, the paper leaf identification device further includes a storage unit for storing a threshold value for identifying paper sheets, and the identification unit is the output data of the mechanical thickness detection sensor and the said. The identification processing thickness data based on at least one of the output data of the non-contact thickness detection sensor is compared with the identification threshold value to perform the identification processing of paper sheets.

Further, the present invention is characterized in that, in the above invention, the identification unit detects an abnormality due to a tape attached to a piece of paper and performs a correct / loss determination process as the identification process.

Further, in the present invention, the paper leaf identification device uses the mechanical thickness detection sensor and the non-contact type thickness detection sensor at one end of the transport path in the transport direction of the paper strips. It is characterized in that it is provided at each of the other ends.

Further, the present invention is a paper leaf processing device, which is characterized by including the paper leaf identification device.

Further, the present invention is a method for identifying paper leaves to be transported, and the thickness of the paper leaves is changed by a change in the distance between rollers provided in the transport path to which the paper leaves are transported. The step of collecting data, the step of collecting thickness data of paper sheets due to the change in capacitance between the counter electrodes provided in the transport path, and the non-contact with the output data of the mechanical thickness detection sensor. It is characterized by including a step of performing identification processing of paper sheets based on at least one of the output data of the formula thickness detection sensor.

According to the paper leaf identification device, the paper leaf processing device, and the paper leaf identification method of the present invention, the thickness of the conveyed paper leaves can be detected with high accuracy.

It is a schematic diagram for demonstrating the outline of Embodiment 1. FIG. It is a schematic diagram explaining the structure of the banknote processing apparatus which concerns on Embodiment 1, (a) is the perspective view which showed the appearance, (b) is the sectional view which showed the internal structure. It is sectional drawing explaining the structure of the detection part included in the banknote acceptor according to Embodiment 1. FIG. It is a plan schematic diagram explaining the structure of the detection part included in the banknote acceptor according to Embodiment 1, (a) is the figure when the upper unit is seen from the bottom, and (b) is the lower unit. It is a figure when viewed from above. It is a schematic diagram which shows the structure of the non-contact type thickness detection sensor which concerns on Embodiment 1, (a) is a perspective view, (b) is a sectional view seen from the direction of carrying banknote, (c). Is a cross-sectional view when viewed from a direction orthogonal to the transport direction of banknotes. FIG. 5 is a schematic view of the configuration of the mechanical thickness detection sensor according to the first embodiment when viewed from a direction orthogonal to the banknote transport direction. It is a block diagram explaining the functional structure of the bill identification device which concerns on Embodiment 1. FIG. It is a schematic diagram for demonstrating the method of determining the front end kick amount in Embodiment 1. FIG. It is a flowchart which shows the processing procedure in the banknote identification device and the banknote identification method which concerns on Embodiment 1. It is a schematic diagram for demonstrating the method of determining the front end kick amount and the rear end kick amount in Embodiment 2. It is a flowchart which shows the processing procedure in the banknote identification device and the banknote identification method which concerns on Embodiment 2.

Hereinafter, preferred embodiments of the paper leaf identification device, the paper leaf processing device, and the paper leaf identification method according to the present invention will be described with reference to the drawings. As the paper leaves to be the subject of the present invention, various paper leaves such as banknotes, checks, gift certificates, bills, forms, securities, card-like media, etc. can be applied. The present invention will be described by exemplifying the apparatus and method described above. The following description is an example of a paper leaf identification device, a paper leaf processing device, and a paper leaf identification method.

(Embodiment 1)
<Outline of this embodiment>
First, the outline of the present embodiment will be described with reference to FIG. In the present embodiment, an ideal output proportional to the thickness of the target banknote is obtained by combining (synthesizing) the outputs of two different types of thickness detection sensors, a non-contact type and a mechanical type, which are in a trade-off relationship. ..

More specifically, as shown in FIG. 1, when a kick occurs at the front end portion BN1 of the transported bill BN, the output of the non-contact thickness detection sensor is used to use a metal object such as a hologram or a thread portion. For the central part, which may contain the metal part BN2 in which is used, the output of the mechanical thickness detection sensor is used. Then, both outputs are combined and used as identification processing data relating to the thickness of the target banknote BN. As a result, the thickness of the banknote can be correctly detected even at the front end portion of the banknote or the metal portion where a metal object such as a hologram or a thread portion is used. Therefore, for example, the tape attached to the banknote can be detected regardless of the affixed portion such as the front end portion.

Since the metal part where the metal object is used is usually not the front end portion and the rear end portion of the bill but the central portion, the output of the mechanical thickness detection sensor can be used without any problem in the central portion of the bill. It is possible.

In the present specification, the front end portion and the rear end portion of the bill (paper leaf) are the end portion (side) of the bill (paper leaf) on the transport direction side (front) and the opposite side (rear) of the transport direction, respectively. ) Corresponds to.

Further, in the present embodiment, an image of a banknote to be conveyed is acquired by using an optical line sensor, the denomination of the banknote is determined from the image, and based on the result, whether or not the banknote contains a metal portion. Is determined.

As a result, if the banknote does not contain a metal portion, the output of the non-contact thickness detection sensor is used for the entire surface of the banknote. As a result, the thickness data can be accurately collected on the entire surface of the banknote while eliminating the processing load related to the synthesis of the sensor outputs of the two methods. This is because the disadvantage of using the non-contact thickness detection sensor is small if there is no metal part.

On the other hand, when the banknote contains a metal portion, it is determined whether or not the front end of the banknote is affected by a kick, and when there is no effect of the kick, the output of the mechanical thickness detection sensor is used for the entire surface of the banknote. This also makes it possible to collect the thickness data with high accuracy on the entire surface of the banknote while eliminating the processing load related to the synthesis of the sensor outputs of the two methods. This is because the disadvantage of using the mechanical thickness detection sensor is small if it is not affected by the kick.

<Structure of banknote processing device>
Next, the configuration of the banknote processing apparatus according to the present embodiment will be described with reference to FIG. The banknote processing device 200 according to the present embodiment has, for example, the configurations shown in FIGS. 2 (a) and 2 (b). The banknote processing device 200 includes a hopper 210 capable of placing a plurality of banknotes, a feeding section 211 for feeding out the banknotes placed on the hopper 210 one by one, and a transport path for transporting the banknotes delivered from the feeding section 211. 212, a bill identification device 100 having a detection unit (not shown in FIG. 2) such as an optical line sensor and performing bill identification processing, and a stacking unit for accumulating normal bills identified by the bill identification device 100. 213, a reject unit 214 for accumulating abnormal banknotes that do not meet the predetermined conditions, a display unit 215 for displaying information input to the banknote processing device 200, the processing result, etc., and a banknote along the transport path 212. It is provided with a transport unit (not shown in FIG. 2) that transports the banknotes one by one. The transport unit includes a plurality of transport means such as rollers and a drive device such as a motor that drives the transport means. The banknote processing device 200 is further provided at a branching point of the transport path 212, and is indicated by a branch portion 216 that switches the transport destination of banknotes in the transport path 212 to either the accumulating portion 213 or the reject portion 214, and a triangular mark in the drawing. Each position is provided with a passage sensor 217 that detects the state of transporting banknotes in the device 200. As the passage sensor 217, a transmission type or reflection type optical sensor is provided. By using the banknote identification device 100 built into such a banknote processing device 200, a plurality of banknotes placed on the hopper 210 can be continuously processed into a fake ticket, a loss ticket, or an uncertain authenticity ticket. The determined banknotes can be returned to the reject unit 214 and sorted.

<Structure of banknote identification device>
Next, the configuration of the bill identification device 100 will be described with reference to FIGS. 3 to 7. As shown in FIGS. 3 and 4, the bill identification device 100 has a detection unit 10 that sequentially detects various features of the bill BN transported along the transport path 212. The detection unit 10 is composed of an upper unit and a lower unit sandwiching a transport path 212 for transporting bills BN in the bill processing device 200. FIG. 4A corresponds to a plan view of the upper unit of the detection unit 10 as viewed from below, and FIG. 4B corresponds to a plan view of the lower unit of the detection unit 10 as viewed from above. .. The detection unit 10 detects the thickness of the bill BN by detecting the change in the capacitance between the counter electrodes facing each other across the transport path 212 along the transport path 212 of the bill BN when passing through the bill BN. Optical that is composed of a contact-type thickness detection sensor 11, an image sensor in which image pickup elements (light receiving elements) are arranged in a line, and an image pickup optical system such as a light source and a lens, and images a bill BN transported along a transport path 212. A line sensor (contact image sensor) 12, a fluorescence sensor 13 that acquires the fluorescence characteristics of the bill BN, a magnetic line sensor 14 that detects magnetic information and a magnetic pattern contained in the bill BN transported along the transport path 212, and transport. It has a configuration in which a mechanical thickness detection sensor 15 that detects the thickness of the bill BN by detecting the amount of displacement of one of the rollers facing the road 212 when passing through the bill BN is arranged side by side. The non-contact thickness detection sensor 11, the optical line sensor 12, the magnetic line sensor 14, and the mechanical thickness detection sensor 15 are provided in a direction (preferably in an orthogonal direction) intersecting the transport direction of the banknote BN, and are provided on the transport path 212. It is long enough for the width and can detect the entire surface of the bill BN. Further, the detection unit 10 is provided with a transport mechanism 16 so that the bill BN can move in the transport path 212. The transport mechanism 16 is not particularly limited, and for example, a mechanism in which a roller, a belt, or the like is driven by a drive device such as a motor is used.

The bill identification device 100 uses the data acquired by these sensors of the detection unit 10 to perform the bill BN identification process. The content of the identification process is not particularly limited, and examples thereof include various functions such as identification of denominations in the case of banknotes and determination of authenticity or correctness of banknotes.

In addition, the non-contact thickness detection sensor 11 and the mechanical thickness detection sensor 15 each detect transport abnormalities such as double feeding, chaining, and folding of banknote BN, and that tape or the like is attached to the banknote BN. Can be done.

As shown in FIG. 5, in the non-contact thickness detection sensor 11, a plurality of electrodes (array-shaped electrodes) 311 arranged in a row in a direction perpendicular to the transport direction of the bill BN, that is, in the main scanning direction, are formed by a dielectric material 313. A coated lower unit, an upper unit in which a plurality of electrodes (array-shaped electrodes) 312 arranged in a row in the main scanning direction so as to face the electrodes 311 at predetermined intervals are coated with a dielectric material 314. It has. The thickness data of the banknote BN is collected by detecting the capacitance between the counter electrodes that changes as the banknote BN is conveyed between the lower unit and the upper unit, that is, the thickness of the banknote BN is measured. Specifically, the change in capacitance between the counter electrodes is converted into a voltage level, and the voltage corresponding to the changing capacitance is output as an electric signal.

Each

electrode

311 and 312 is formed of a metal material such as aluminum or copper into a columnar shape such as a cylinder or a prism, and a lead wire (not shown) is connected to the surface of each

electrode

311 or 312 opposite to the transport path 212. , A terminal for detecting capacitance is provided at the end of the terminal.

Each

dielectric material

313, 314 is formed of a resin such as polyacetal resin or a ceramic material.

The non-contact thickness detection sensor 11 has 12 channels, that is, 12 pairs of

electrodes

311 and 312, with a pair of

electrodes

311 and 312 as one channel, and outputs a signal for each channel. As a result, the bill BN can be divided into regions corresponding to each channel, and the thickness can be measured in each region.

In the optical line sensor 12, a linear light source capable of irradiating visible light or infrared light and a CCD or CMOS one-dimensional image sensor (linear image sensor) are arranged one above the other to obtain an image of a bill BN. Specifically, it has a function of acquiring a visible light image and an infrared light image. Further, the optical line sensor 12 includes a reflected image of the upper surface of the bill BN (an image of the reflected light reflected by the bill BN), a reflected image of the lower surface of the bill BN, and a transmitted image of the bill BN (transmitted light transmitted through the bill BN). Image) and is configured to be acquired.

Each one-dimensional image sensor has a plurality of pixels arranged in a row in a direction perpendicular to the transport direction of the bill BN (main scanning direction), and the optical line sensor 12 performs one imaging (exposure of pixels). Is taken as one line, imaging is repeated at regular time intervals for the bill BN transported in the transport direction, that is, the sub-scanning direction, and image data of the entire bill BN is acquired.

The fluorescence sensor 13 has a function of irradiating the banknote BN with ultraviolet light and measuring the fluorescence to acquire the fluorescence characteristics of the banknote BN.

The magnetic line sensor 14 is arranged so as to face the magnetic line sensor unit (magnetic head) 14a in which the magnetic sensors are arranged in a row in the direction perpendicular to the transport direction of the bill BN (main scanning direction) and the magnetic line sensor unit 14a. The magnetic line sensor unit 14a is provided with a bristle roller 14b that presses the bill BN, and the magnetic line sensor unit 14a measures the magnetic characteristics (magnetic image) of the bill BN.

As shown in FIG. 6, in the mechanical thickness detection sensor 15, a plurality of driven rollers 512 on the upper side have a thickness of a bill BN with respect to a drive roller 511 on the lower side rotatably supported around a rotation axis. It is supported so as to be movable in the direction (vertical direction), and the amount of displacement when the position of the driven roller 512 on the upper side moves upward according to the thickness of the banknote BN carried between the

rollers

512 and 511. By measuring, the thickness data of the banknote BN is collected, that is, the thickness of the banknote BN is measured.

Further, the mechanical thickness detection sensor 15 has a function as a pinch roller for transporting the bill BN along the transport path 212.

The plurality of driven rollers 512 are arranged in a direction (main scanning direction) perpendicular to the transport direction of the bill BN. With a predetermined number of driven rollers 512 as one channel, the thickness of the bill BN is measured by the driven rollers 512 of a plurality of channels. For example, two pairs of driven rollers 512 are used as one channel, and 12 channels, that is, 24 driven rollers 512 are provided. The driven roller 512 is independently displaceable in the vertical direction for each channel, and the mechanical thickness detection sensor 15 outputs a signal for each channel. As a result, the bill BN can be divided into regions corresponding to each channel, and the thickness can be measured in each region.

As described above, the mechanical thickness detection sensor 15 has the same number of channels as the non-contact thickness detection sensor 11. Further, the corresponding channels of the mechanical thickness detection sensor 15 and the non-contact thickness detection sensor 11, that is, the corresponding driven rollers 512 and the

counter electrodes

311 and 313 are arranged at the same positions in the main scanning direction. In this way, by configuring the mechanical thickness detection sensor 15 and the non-contact thickness detection sensor 11 with the same number of channels arranged at the same position in the main scanning direction, the output data of the mechanical thickness detection sensor 15 is not generated. The process of synthesizing with the output data of the contact-type thickness detection sensor 11 can be made simpler. The number of channels of the mechanical thickness detection sensor 15 and the non-contact thickness detection sensor 11 is not particularly limited and can be set as appropriate.

As shown in FIG. 6, each driven roller 512 is rotatably supported by a roller support 513. The roller support 513 is rotatably supported around the rotation shaft 515 with respect to the sensor body 514. In the example shown in FIG. 6, the rotation shaft 515 is parallel to the rotation axis of the driven roller 512 and is orthogonal to the transport direction of the bill BN.

A compression spring 516 is arranged between the roller support 513 and the sensor body 514. The compression spring 516 urges the roller support 513 in the direction of pressing the driven roller 512 against the drive roller 511, while the driven roller 512 rotates the roller support 513 in the direction away from the drive roller 511. Tolerate.

A magnet 517 is attached to the upper end of the roller support 513. As will be described later, when the bill BN passes between the pair of

rollers

511 and 512, the driven roller 512 is displaced in the direction away from the drive roller 511 while the roller support 513 is rotated due to the thickness of the bill BN. .. As a result, the magnet 517 attached to the upper end of the roller support 513 changes its position in the substantially horizontal direction (see the alternate long and short dash line in FIG. 6).

Two Hall elements 518 are attached to the sensor body 514 so as to face the magnet 517 attached to the upper end of the roller support 513. The Hall element 518 is configured to detect the magnetic field formed by the magnet 517. As described above, when the magnet 517 moves in the horizontal direction, a voltage corresponding to the magnetic field changed by the movement is output as an electric signal.

The non-contact thickness detection sensor 11 and the mechanical thickness detection sensor 15 also function as a bill detection sensor that detects the entry of the bill BN into the bill identification device 100 and the passage from the bill identification device 100. Since these sensors detect the thickness of the banknote BN, unlike a general optical banknote detection sensor, even a banknote having a transparent part such as a clear window can reliably and accurately detect its entry and passage. It is possible to do.

Therefore, by arranging the non-contact thickness detection sensor 11 and the mechanical thickness detection sensor 15 at one end and the other end of the transport path 212 in the transport direction of the bill BN in the bill identification device 100, respectively. It is possible to reliably and accurately detect the entry and passage of banknotes BN without providing a general optical banknote detection sensor.

Further, as shown in FIG. 7, the bill identification device 100 includes a control unit 20 that controls each component of the bill identification device 100, and a storage unit 30. Each sensor of the detection unit 10, the transport mechanism 16, the storage unit 30, and the like are connected to the control unit 20.

The storage unit 30 is composed of a non-volatile storage device such as a semiconductor memory or a hard disk. The storage unit 30 contains a sensor selection threshold value 31 as a reference for determining the presence or absence of the influence of a kick on the output data of the mechanical thickness detection sensor 15, a non-contact thickness detection sensor 11 and / or a mechanical thickness detection. The identification threshold value 32, which is a reference for performing the identification process based on the identification process thickness data based on the output data of the sensor 15, is stored.

The control unit 20 has the functions of a type determination unit 21, a metal determination unit 22, a noise amount determination unit 23, a sensor output selection unit 24, a data synthesis processing unit 25, and an identification unit 26. The control unit 20 is composed of, for example, a software program for realizing various processes, a CPU for executing the software program, various hardware controlled by the CPU, and the like. Software programs and data necessary for the operation of the control unit 20 are stored in the storage unit 30.

The type determination unit 21 performs a process of determining the denomination (type) of the banknote based on the image data of the banknote collected by the optical line sensor 12.

More specifically, the type determination unit 21 collates the image data of the banknote with the determination data including the banknote template, the threshold value, etc. stored in the storage unit 30, and determines the denomination of the captured banknote. ..

Further, the type determination unit 21 determines the transport state including the direction, front and back, position, and skew size of the banknote based on the image data of the banknote.

The metal determination unit 22 determines whether or not the bill contains a metal portion based on the determination result by the type determination unit 21.

The determination process by the metal determination unit 22 may be performed on the entire banknote, or may be performed for each region corresponding to each channel of the non-contact thickness detection sensor 11 and the mechanical thickness detection sensor 15 of the banknote. Specifically, in the former case, for example, for each banknote denomination, a table showing the presence or absence of a metal portion that adversely affects the output of the non-contact thickness detection sensor 11 is displayed in any one of the banknote processing devices 200. It is stored in the storage unit, and the metal determination unit 22 determines whether or not the bill contains a metal portion by referring to the table based on the determination result by the type determination unit 21. In the latter case, for example, for each denomination of the bill and for each region corresponding to the channel, a table showing the presence or absence of a metal portion that adversely affects the output of the non-contact thickness detection sensor 11 is provided in the bill processing device 200. Each area corresponding to the channel is stored in one of the storage units, and the metal determination unit 22 refers to the table based on the determination result by the type determination unit 21 and the position information of the area to be determined. Determines whether or not contains metal parts.

The noise amount determining unit 23 is the front end, which is the amount of noise generated when the front end of the bill collides with the

rollers

511 and 512 in the output data of the mechanical thickness detection sensor 15 (hereinafter, also referred to as the output data of the mechanical sensor). Determine the amount of club kick.

More specifically, as shown in FIG. 8, the noise amount determining unit 23 kicks the front end portion BN1 of the bill BN by subtracting a predetermined reference value from the output value (thickness) of the output data of the mechanical sensor. The size L and the width W of are calculated. The noise amount determination unit 23 performs this processing on the output data of each channel of the mechanical thickness detection sensor 15.

The kick size L represents the magnitude (maximum value) of the output fluctuation of the mechanical sensor caused by the kick, and the kick width W means the output fluctuation of the mechanical sensor caused by the kick. Represents the width in the transport direction (sub-scanning direction). That is, the kick size L is an index showing how much the driven roller 512 vibrates due to the kick, and the kick width W is how long the driven roller 512 vibrates due to the kick. It is an index indicating whether or not the kick has been made, and the front end kick amount includes the kick size L and the width W.

The sensor output selection unit 24 uses the output data of the non-contact thickness detection sensor 11 (hereinafter, also referred to as the output data of the non-contact sensor) as the identification processing thickness data used for the identification process based on the thickness data of the bill, that is, the output data of the non-contact type sensor. The process of determining whether to use the thickness data or the output data of the mechanical sensor, that is, the thickness data is performed. The sensor output selection unit 24 performs this process on each channel of the non-contact type thickness detection sensor 11 and the mechanical thickness detection sensor 15. The method will be described in detail below.

When the metal determination unit 22 determines that the banknote does not include a metal portion, the sensor output selection unit 24 outputs a non-contact sensor as thickness data for identification processing corresponding to the entire area of the banknote. Select data.

In the present embodiment, the entire area of the bill means the entire area corresponding to the channel to be processed. That is, in the present specification, the "whole area of the banknote (paper leaf)" means at least the entire area from one end to the other end of the banknote (paper leaf) in the transport direction, and the main scanning direction is described above. It may be a part of the area corresponding to the channel as in the above, or when processing is not performed for each channel, it is the entire area from one end to the other end of the banknote (paper leaf) even in the main scanning direction. You may.

On the other hand, when (2) the metal determination unit 22 determines that the bill contains a metal portion, the sensor output selection unit 24 senses the front end kick amount determined by (2-1) the noise amount determination unit 23. Compare with the selection threshold 31. This makes it possible to select appropriate output data according to the actual front end kick amount.

Then, (2-1-1), when the front end kick amount is within the permissible range with respect to the sensor selection threshold value 31, the sensor output selection unit 24 has the identification processing thickness data corresponding to the entire area of the banknote. Select the output data of the mechanical sensor as.

On the other hand, (2-1-2), when the front end kick amount is not within the permissible range with respect to the sensor selection threshold 31, the sensor output selection unit 24 uses the identification processing data corresponding to the front end of the bill as data for identification processing. The output data of the non-contact sensor is selected, and the output data of the mechanical sensor is selected as the identification processing data corresponding to the central portion and the rear end portion of the bill. This makes it possible to accurately detect the thickness of the bill while eliminating the influence of the kick at the front end of the bill and the influence of the metal portion.

Further, the sensor output selection unit 24 performs a process of designating a position for switching between the output data of the non-contact sensor and the output data of the mechanical sensor, that is, the boundary between the front end portion and the center portion of the banknote.

Preferably, the sensor output selection unit 24 specifies the switching position according to the kick width W of the front end kick amount. Specifically, for example, as shown in FIG. 8, a position separated from the kick width W by a predetermined width w in the transport direction may be set as the switching position.

On the other hand, regardless of the kick amount at the front end portion, the switching position may be set in advance for each condition such as the transport speed of the bill and the denomination, and stored in any storage unit in the bill processing device 200. In this case, the sensor output selection unit 24 determines the switching position by reading from the storage unit a switching position that matches conditions such as the transport speed of the target banknote and the denomination.

In any case, when the metal portion is near the front end portion, it is preferable to set the switching position so as not to erroneously detect the metal portion.

The data synthesis processing unit 25 synthesizes the output data of the non-contact sensor and the output data of the mechanical sensor selected by the sensor output selection unit 24, and combines the output data of the non-contact sensor and the output data of the front end, the center and the rear end of the banknote, that is, Generate identification processing data corresponding to all areas. The data synthesis processing unit 25 performs this processing on each channel of the non-contact type thickness detection sensor 11 and the mechanical thickness detection sensor 15.

More specifically, in the case of (2-1-2) above, the data synthesis processing unit 25 corresponds to the output data of the non-contact sensor corresponding to the front end portion of the bill and the central portion and the rear end portion of the bill. Data for identification processing is generated by combining with the output data of the mechanical sensor. That is, the identification processing data is generated by combining the output data of the non-contact sensor up to the switching position designated by the sensor output selection unit 24 and the output data of the mechanical sensor after the switching position with each other.

As described above, the banknote identification processing data is generated based on at least one of the output data of the non-contact sensor and the output data of the mechanical sensor.

The identification unit 26 performs the bill identification process based on at least one of the thickness data for the identification process and the output data of the output data of the non-contact sensor. As a result, the identification process based on the thickness data, which is less affected by noise, is possible, so that the accuracy of the identification process based on the data can be improved.

More specifically, the identification unit 26 compares the thickness data for identification processing with the identification threshold value 32 and performs the identification processing of banknotes. Further, the identification unit 26 identifies the banknotes by comparing the identification processing thickness data of each channel with the identification threshold value 32 and comprehensively determining the comparison results of all the channels.

Among them, the identification unit 26 performs a positive / loss determination process as the identification process. As a result, it is possible to accurately discriminate between a positive ticket and a lost ticket based on the thickness data that is less affected by noise. Specifically, for example, as a loss ticket, it is possible to detect a banknote that has a defect such as a tear or a hole, or a banknote that has been damaged such as a fold, a wrinkle, or a tape.

In particular, it is preferable that the identification unit 26 detects an abnormality caused by the tape attached to the banknote and performs a correct / loss determination process. As a result, the banknote to which the tape is attached can be accurately detected as a loss ticket. In this case, for example, the identification unit 26 compares the identification processing thickness data with the identification threshold value 32, and if the thickness of the banknote exceeds the identification threshold value 32, the identification unit 26 determines that the banknote is a banknote to which the tape is attached. If the thickness of the banknote is 32 or less for the identification threshold value, it is determined that the banknote is not taped.

It is possible to use a general method for the identification process and the positive / loss determination process using the identification threshold value.

<Processing flow by banknote acceptors>
Next, with reference to FIG. 9, a processing flow by the bill identification device and the bill identification method according to the present embodiment, particularly, a processing flow related to the identification processing based on the thickness data of the bills will be described.

As shown in FIG. 9, first, the non-contact thickness detection sensor 11 collects the thickness data of the banknote for each channel (step S10). That is, the thickness data of the banknote is collected for each channel by the change of the capacitance between the

counter electrodes

311 and 312 provided in the transport path 212.

Next, the mechanical thickness detection sensor 15 collects the thickness data of the banknote for each channel (step S11). That is, the thickness data of banknotes is collected for each channel by changing the distance between the

rollers

511 and 512 provided in the transport path 212.

In addition, steps S10 and S11 may be executed in parallel as shown in FIG. When the banknotes are conveyed in the order of the mechanical thickness detection sensor 15 and the non-contact thickness detection sensor 11, steps S11 and S10 are executed in this order.

Next, the type determination unit 21 determines the denomination of the banknote based on the image data of the banknote collected by the optical line sensor 12, and transports the banknote including the direction, front and back, position, and skew size of the banknote. The state is determined (step S12).

Next, the metal determination unit 22 determines whether or not the banknote contains a metal portion based on the determination result by the type determination unit 21 for the entire banknote or for each channel of the thickness detection sensor (step S13). ..

From this point onward, the processing up to immediately before step S21 is executed for each channel of the

thickness detection sensors

11 and 15.

When it is determined that the banknote does not include the metal portion (step S13: Yes), the sensor output selection unit 24 uses the output data of the non-contact sensor as the identification processing thickness data corresponding to the entire area of the banknote. Select (step S14) and proceed to step S21.

When it is determined that the bill contains a metal portion (step S13: No), the noise amount determining unit 23 determines the front end kick amount in the output data of the mechanical sensor (step S15).

Next, the sensor output selection unit 24 compares the front end kick amount determined by the noise amount determination unit 23 with the sensor selection threshold value 31 (step S16).

When the front end kick amount is within the permissible range with respect to the sensor selection threshold value 31 (for example, equal to or less than the sensor selection threshold value) (step S16: Yes), the sensor output selection unit 24 corresponds to the entire area of the bill. The output data of the mechanical sensor is selected as the thickness data for the identification process (step S17), and the process proceeds to step S21.

If the front end kick amount is not within the permissible range with respect to the sensor selection threshold 31 (for example, exceeds the sensor selection threshold) (step S16: No), the sensor output selection unit 24 corresponds to the front end of the bill. The output data of the non-contact sensor is selected as the identification processing data to be performed, and the output data of the mechanical sensor is selected as the identification processing data corresponding to the central portion and the rear end portion of the bill (step S18).

Next, the sensor output selection unit 24 specifies a position for switching between the output data of the non-contact sensor and the output data of the mechanical sensor (step S19).

Next, the data synthesis processing unit 25 synthesizes the output data of the non-contact sensor and the output data of the mechanical sensor selected by the sensor output selection unit 24, and combines the output data of the non-contact type sensor with the output data of the front end portion, the center portion and the rear end portion of the banknote. The identification processing data corresponding to the unit, that is, the entire area is generated (step S19), and the process proceeds to step S21.

In step S21, the identification unit 26 compares the identification processing thickness data of each channel with the identification threshold value 32, and performs the bill identification processing (preferably the positive / loss determination processing based on the detection of the tape attached to the bill). This is performed, and the identification process based on the thickness data of the banknote is completed.

(Embodiment 2)
This embodiment is substantially different from the first embodiment except that the output of the thickness detection sensor of two different types, non-contact type and mechanical type, is selected for the rear end portion of the banknote depending on the presence or absence of a kick. Since they are the same, the description of the duplicated contents will be omitted.

<Structure of banknote identification device>
In the present embodiment, the noise amount determining unit 23 determines the amount of noise generated by the rear end of the bill passing (exiting) the

rollers

511 and 512 in addition to the front end kick amount in the output data of the mechanical sensor. Determine a certain rear end kick amount. The noise amount determination unit 23 performs this processing on the output data of each channel of the mechanical thickness detection sensor 15.

More specifically, as shown in FIG. 10, the noise amount determining unit 23 subtracts a predetermined reference value from the output value (thickness) of the output data of the mechanical sensor to obtain the front end portion BN1 and the rear end portion BN1 of the bill BN. The kick size L and width W at the end BN3 are calculated. The front end kick amount and the rear end kick amount both include the kick size L and the width W.

In the case of (2) described in the first embodiment, that is, when the metal determination unit 22 determines that the bill contains a metal portion, the sensor output selection unit 24 is subjected to (2-2) noise amount determination unit 23. The determined front end kick amount and rear end kick amount are compared with the sensor selection threshold value 31, respectively. Thereby, appropriate output data can be selected according to the actual front end kick amount and the rear end kick amount.

Then, when (2-2-1) both the front end kick amount and the rear end kick amount are within the permissible range with respect to the sensor selection threshold value 31, the sensor output selection unit 24 uses the entire area of the bill. The output data of the mechanical sensor is selected as the thickness data for the identification process corresponding to.

On the other hand, if neither the front end kick amount nor the rear end kick amount is within the permissible range with respect to the sensor selection threshold 31, the sensor output selection unit 24 uses the front end portion and the rear end portion of the bill. The output data of the non-contact sensor is selected as the identification processing data corresponding to the rear end portion, and the output data of the mechanical sensor is selected as the identification processing data corresponding to the central portion of the bill.

(2-2-3) When the front end kick amount is not within the permissible range with respect to the sensor selection threshold 31 and the rear end kick amount is within the permissible range with respect to the sensor selection threshold 31. , The sensor output selection unit 24 selects the output data of the non-contact sensor as the identification processing data corresponding to the front end portion of the bill, and as the identification processing data corresponding to the central portion and the rear end portion of the bill. , Select the output data of the mechanical sensor.

(2-2-4) When the front end kick amount is within the permissible range with respect to the sensor selection threshold 31 and the rear end kick amount is not within the permissible range with respect to the sensor selection threshold 31. The sensor output selection unit 24 selects the output data of the non-contact sensor as the identification processing data corresponding to the rear end portion of the bill, and sets the output data of the non-contact sensor as the identification processing data corresponding to the front end portion and the center portion of the bill. Select the output data of the mechanical sensor.

In any of the above cases (2-2-2), (2-2-3) and (2-2-4), the influence of the kick on the front end and the rear end of the bill and the influence of the metal part are examined. While eliminating, the thickness of the bill can be detected with high accuracy.

In the present embodiment, the sensor output selection unit 24 has a position for switching between the output data of the non-contact sensor and the output data of the mechanical sensor, that is, a first switching position which is a boundary between the front end portion and the central portion of the bill. The process of designating the second switching position, which is the boundary between the central portion and the rear end portion of the bill, is performed.

Preferably, the sensor output selection unit 24 designates the first and second switching positions according to the width W of each kick of the front end kick amount and the rear end kick amount. Specifically, for example, as shown in FIG. 10, a position separated from the kick width W on the front end side by a predetermined width w in the transport direction is set as the first switching position, and the kick width W on the rear end side is used. A position separated by a predetermined width w in the transport direction may be used as the second switching position. Here, the predetermined width w on the front end side may be the same as or different from the predetermined width w on the rear end side.

On the other hand, as in the first embodiment, the first and second switching positions are set in advance for each condition such as the transport speed of the bill and the denomination, regardless of the kick amount at the front end and the kick amount at the rear end, and the bill is processed. It may be stored in any storage unit in the device 200. In this case, the sensor output selection unit 24 determines the first and second switching positions by reading the first and second switching positions that match the conditions such as the transport speed and denomination of the target banknote from the storage unit. To do.

In any case, when the metal portion is near the front end portion and / or the rear end portion, it is preferable to set the switching position so as not to erroneously detect the metal portion.

In the case of (2-2-2) above, the data synthesis processing unit 25 outputs the output data of the non-contact sensor corresponding to the front end portion and the rear end portion of the bill and the output of the mechanical sensor corresponding to the center portion of the bill. Generate identification processing data by combining with data. That is, the output data of the non-contact sensor up to the first switching position designated by the sensor output selection unit 24, the output data of the mechanical sensor from the first switching position to the second switching position, and the second Identification processing data is generated by combining the output data of the non-contact sensor after the switching position of.

In the case of the above (2-2-3), the data synthesis processing unit 25 is the output data of the non-contact sensor corresponding to the front end portion of the bill and the mechanical sensor corresponding to the central portion and the rear end portion of the bill. Generate identification processing data by combining with output data. That is, the identification processing data is obtained by combining the output data of the non-contact sensor up to the first switching position designated by the sensor output selection unit 24 and the output data of the mechanical sensor after the first switching position with each other. To generate.

In the case of the above (2-2-4), the data synthesis processing unit 25 is the output data of the mechanical sensor corresponding to the front end portion and the center portion of the bill and the non-contact sensor corresponding to the rear end portion of the bill. Generate identification processing data by combining with output data. That is, the identification processing data is obtained by combining the output data of the mechanical sensor up to the second switching position designated by the sensor output selection unit 24 and the output data of the non-contact sensor after the second switching position with each other. To generate.

<Processing flow by banknote processing device>
Next, with reference to FIG. 11, a processing flow by the banknote processing apparatus according to the present embodiment, particularly a processing flow related to identification processing based on the thickness data of banknotes will be described.

As shown in FIG. 11, first, as in the first embodiment, the process up to step S13 related to the determination process by the metal determination unit 22 is executed.

thickness detection sensors

11 and 15.

When it is determined that the bill contains a metal portion (step S13: No), the noise amount determining unit 23 determines the front end kick amount and the rear end kick amount respectively in the output data of the mechanical sensor (step S25). ).

Next, the sensor output selection unit 24 compares the front end kick amount determined by the noise amount determination unit 23 with the sensor selection threshold value 31 (step S26).

When the front end kick amount is within the allowable range with respect to the sensor selection threshold value 31 (for example, equal to or less than the sensor selection threshold value) (step S26: Yes), the sensor output selection unit 24 is determined by the noise amount determination unit 23. The rear end kick amount is compared with the sensor selection threshold value 31 (step S27).

When the rear end kick amount is within the permissible range with respect to the sensor selection threshold value 31 (for example, equal to or less than the sensor selection threshold value) (step S27: Yes), the sensor output selection unit 24 covers the entire area of the bill. The output data of the mechanical sensor is selected as the corresponding thickness data for identification processing (step S28), and the process proceeds to step S21.

If the rear end kick amount is not within the permissible range with respect to the sensor selection threshold 31 (for example, exceeds the sensor selection threshold) (step S27: No), the sensor output selection unit 24 is the rear end portion of the bill. The output data of the non-contact sensor is selected as the identification processing data corresponding to the above, and the output data of the mechanical sensor is selected as the identification processing data corresponding to the front end portion and the center portion of the bill (step S29). , Step S19.

Even when the front end kick amount is not within the permissible range with respect to the sensor selection threshold value 31 (for example, exceeds the sensor selection threshold value) in step S26 (step S26: No), the sensor output selection unit 24 is the noise amount determination unit. The rear end kick amount determined by 23 is compared with the sensor selection threshold 31 (step S30).

When the rear end kick amount is within the permissible range with respect to the sensor selection threshold 31 (for example, equal to or less than the sensor selection threshold) (step S30: Yes), the sensor output selection unit 24 is placed on the front end of the bill. The output data of the non-contact sensor is selected as the corresponding identification processing data, and the output data of the mechanical sensor is selected as the identification processing data corresponding to the central portion and the rear end portion of the bill (step S31). , Step S19.

If the amount of kick at the rear end is not within the permissible range with respect to the sensor selection threshold 31 (for example, exceeds the sensor selection threshold) (step S30: No), the sensor output selection unit 24 performs the front end portion of the bill and the front end of the bill. The output data of the non-contact sensor is selected as the identification processing data corresponding to the rear end portion, and the output data of the mechanical sensor is selected as the identification processing data corresponding to the central portion of the bill (step S32). , Step S19.

After that, as in the first embodiment, the step S19 for designating the switching position, the step S20 for generating the identification processing data, and the step S21 related to the identification processing are executed, and the identification processing based on the thickness data of the banknote is completed. To do.

As described above, in the above embodiment, the thickness data of the bill is collected by the change in the distance between the

rollers

511 and 512 provided in the transport path 212 of the bill, and the counter electrode 311 provided in the transport path 212 is collected. Since the thickness data of the bill is collected due to the change in capacitance between 312 and 312, the former thickness data (thickness data by the mechanical thickness detection sensor) is used for the parts affected by metal parts such as holograms and threads. ), And the latter thickness data (thickness data by the non-contact thickness detection sensor) can be used for the part affected by the kick. Therefore, the thickness of the banknotes to be transported can be detected with high accuracy.

In the above embodiment, when the banknote has a metal portion and the front end kick amount (and the rear end kick amount) of the banknote is within a predetermined allowable range, the output data of the mechanical sensor is selected. As described above, the output data of the non-contact type sensor may be selected depending on the accuracy of the non-contact type thickness detection sensor 11 and the mechanical thickness detection sensor 15.

Further, in the above embodiment, either the output data of the non-contact sensor or the output data of the mechanical sensor is selected based on the presence / absence of the metal portion and the presence / absence of the front end kick amount (and the rear end kick amount). Although the case of deciding whether to perform the determination has been described, it is possible to set in advance whether to select the output data of the non-contact sensor or the output data of the mechanical sensor regardless of these conditions. Specifically, for example, when combining the type of output data to be selected, the output data of the non-contact sensor, and the output data of the mechanical sensor for each condition such as the denomination of the banknote and the transport state, the switching is performed. The position may be set in advance, stored in any storage unit in the bill processing apparatus 200, and processed based on this setting.

Further, in the above embodiment, the case where the banknotes are transported in the short direction through the transport path 212 in the banknote processing device 200 has been described, but the banknotes are transported in the longitudinal direction in the transport path in the banknote processing device according to the present invention. May be transported to.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above embodiments. Further, the configurations of the respective embodiments may be appropriately combined or modified as long as they do not deviate from the gist of the present invention.

As described above, the present invention is a technique useful for detecting the thickness of paper sheets to be transported.

10: Detection unit 11: Non-contact thickness detection sensor 12: Optical line sensor 13: Thickness detection sensor 14: Magnetic line sensor 14a: Magnetic line sensor unit (magnetic head)
14b: Hair roller 15: Mechanical thickness detection sensor 16: Conveying mechanism 20: Control unit 21: Type determination unit 22: Metal determination unit 23: Noise amount determination unit 24: Sensor output selection unit 25: Data synthesis processing unit 26: Identification Unit 30: Storage unit 31: Sensor selection threshold 32: Identification threshold 100: Bill identification device (paper leaf identification device)
200: Banknote processing device (paper leaf processing device)
210: Hopper 211: Feeding section 212: Transport path 213: Stacking section 214: Reject section 215: Display section 216: Branch section 218: Transport section 311, 312: Electrodes 313, 314: Dielectric material 511: Drive roller (rotating body) )
512: Driven roller (rotating body)
513: Roller support 514: Sensor body 515: Rotating shaft 516: Compression spring 517: Magnet 518: Hall element BN: Banknote BN1: Front end BN2: Metal part BN3: Rear end

Claims

It is a paper leaf identification device that identifies the paper leaves to be transported.
A mechanical thickness detection sensor that collects thickness data of paper sheets by changing the distance between rollers provided in the transport path where the paper sheets are transported, and
A non-contact thickness detection sensor that collects thickness data of paper sheets by changing the capacitance between counter electrodes provided in the transport path.
An identification unit that performs identification processing of paper sheets based on at least one of the output data of the mechanical thickness detection sensor and the output data of the non-contact thickness detection sensor.
A paper leaf identification device characterized by comprising.
A storage unit that stores the sensor selection threshold and
In the output data of the mechanical thickness detection sensor, a noise amount determining unit that determines the kick amount of the front end portion, which is the amount of noise generated when the front end portion of the paper sheet collides with the roller,
The front end kick amount is compared with the sensor selection threshold, and the output data of the mechanical thickness detection sensor and the non-contact thickness detection sensor are used as the thickness data for identification processing corresponding to the front end of the paper sheet. A sensor output selection unit that executes a sensor selection process that selects which of the output data to use
The paper leaf identification device according to claim 1, further comprising.
When the front end kick amount is within an allowable range with respect to the sensor selection threshold value, the sensor output selection unit detects the mechanical thickness as thickness data for identification processing corresponding to the entire region of paper sheets. The paper leaf identification device according to claim 2, wherein the output data of the sensor is selected.
When the front end kick amount is not within the permissible range with respect to the sensor selection threshold, the sensor output selection unit uses the non-contact thickness detection sensor as identification processing data corresponding to the front end of paper sheets. The paper leaf according to claim 2, wherein the output data of the mechanical thickness detection sensor is selected, and the output data of the mechanical thickness detection sensor is selected as the identification processing data corresponding to the central portion and the rear end portion of the paper leaf. Class identification device.
The output data of the non-contact type thickness detection sensor and the output data of the mechanical thickness detection sensor selected by the sensor output selection unit are combined and subjected to the front end portion, the center portion and the rear end portion of the paper sheets. The paper leaf identification device according to claim 4, further comprising a data synthesis processing unit that generates corresponding identification processing data.
In the output data of the mechanical thickness detection sensor, the noise amount determining unit further determines the rear end kick amount, which is the noise amount generated when the rear end of the paper sheets passes through the roller.
In the sensor selection process, the sensor output selection unit compares the kick amount at the rear end portion with the threshold value for sensor selection, and uses the mechanical type as the identification processing thickness data corresponding to the rear end portion of paper sheets. The paper leaf identification device according to claim 2, further selecting which of the output data of the thickness detection sensor and the output data of the non-contact thickness detection sensor is to be used.
The sensor output selection unit is used for identification processing thickness data corresponding to the entire region of paper sheets when the front end kick amount and the rear end kick amount are within an allowable range with respect to the sensor selection threshold. The paper leaf identification device according to claim 6, wherein the output data of the mechanical thickness detection sensor is selected.
The sensor output selection unit identifies the front end portion and the rear end portion of the paper sheets when the front end kick amount and the rear end kick amount are not within the permissible range with respect to the sensor selection threshold, respectively. The feature is that the output data of the non-contact type thickness detection sensor is selected as the processing data, and the output data of the mechanical thickness detection sensor is selected as the identification processing data corresponding to the central portion of the paper sheet. The paper leaf identification device according to claim 6.
The output data of the non-contact type thickness detection sensor and the output data of the mechanical thickness detection sensor selected by the sensor output selection unit are combined and subjected to the front end portion, the center portion and the rear end portion of the paper sheets. The paper leaf identification device according to claim 8, further comprising a data synthesis processing unit that generates corresponding identification processing data.
An optical line sensor provided in the transport path for collecting image data of paper sheets, and
A type determination unit that determines the type of paper leaves based on the image data,
Based on the determination result by the type determination unit, the metal determination unit that determines whether or not the paper sheet contains a metal portion, and the metal determination unit.
Further prepare
The paper leaf according to any one of claims 2 to 9, wherein when the metal determination unit determines that the paper leaves contain a metal portion, the sensor selection unit performs the sensor selection process. Class identification device.
An optical line sensor provided in the transport path for collecting image data of paper sheets, and
A type determination unit that determines the type of paper leaves based on the image data,
Based on the determination result by the type determination unit, the metal determination unit that determines whether or not the paper sheet contains a metal portion, and the metal determination unit.
When the metal determination unit determines that the paper leaves do not contain a metal portion, the output data of the non-contact thickness detection sensor is selected as the thickness data for identification processing corresponding to the entire region of the paper leaves. Sensor output selection unit and
The paper leaf identification device according to claim 1, further comprising.
It also has a storage unit that stores the threshold value for identifying paper sheets.
The identification unit compares the thickness data for identification processing based on at least one of the output data of the mechanical thickness detection sensor and the output data of the non-contact thickness detection sensor with the identification threshold value of paper sheets. The paper leaf identification device according to any one of claims 1 to 11, wherein the identification process is performed.
The paper leaf identification device according to claim 12, wherein the identification unit detects an abnormality caused by a tape attached to the paper leaf and performs a positive / loss determination process as the identification process.
Claims 1 to 13, wherein the mechanical thickness detection sensor and the non-contact thickness detection sensor are provided at one end and the other end of the transport path in the transport direction of paper sheets, respectively. The paper leaf identification device according to any one.
A paper leaf processing device comprising the paper leaf species identification device according to any one of claims 1 to 14.
It is a paper leaf identification method for identifying the paper leaves to be transported.
The step of collecting the thickness data of the paper sheets by changing the distance between the rollers provided in the transport path where the paper sheets are transported, and the step of collecting the thickness data of the paper sheets.
A step of collecting thickness data of paper sheets by changing the capacitance between counter electrodes provided in the transport path, and
A step of identifying paper sheets based on at least one of the output data of the mechanical thickness detection sensor and the output data of the non-contact thickness detection sensor, and
A method for identifying paper leaves, which comprises.