Paper sheet inspection device and program

Abstract

To provide a paper sheet inspection device and program that can obtain a setting range for determining whether a paper sheet is normal or not.SOLUTION: An inspection device 4 includes a sensor (4a) that detects a first detection value indicating a physical quantity of a first paper sheet, and a control unit 30 that determines the first paper sheet to be normal when first detection values are within a setting range and determines the first paper sheet to be abnormal when the first detected values are not within the setting range. The control unit 30 sets the setting range based on a plurality of second detected values detected by the sensor (4a). The setting range is a range from a first set value to a second set value. Each of the second detected values indicates a physical quantity of one corresponding second paper sheet out of the plurality of second paper sheets.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] An embodiment of the present invention relates to a sheet inspection device and a program. [Background technology]

[0002] 2. Description of the Related Art Known sheet processing devices include banknote processing machines that collect and process a plurality of banknotes circulating in the market. The sheet processing devices include a sheet inspection device having a sensor that detects the physical quantity of the sheet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-107291 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present embodiment provides a sheet inspection device and a program capable of obtaining a setting range for determining whether a sheet is normal or not. [Means for solving the problem]

[0005] A paper sheet inspection device according to an embodiment includes: The device comprises a sensor that detects a first detection value indicating a physical quantity of a first sheet of paper, and a control unit that judges the first sheet of paper to be normal if the first detection value is within a set range, and judges the first sheet of paper to be abnormal if the first detection value is not within the set range, wherein the control unit sets the set range based on a plurality of second detection values ​​detected by the sensor, the set range ranging from a first set value that is less than or equal to the minimum of the plurality of second detection values ​​to a second set value that is greater than or equal to the maximum of the plurality of second detection values, and each of the second detection values ​​indicates the physical quantity of a corresponding one of a plurality of second sheets of paper.

[0006] Moreover, a program according to an embodiment includes: A computer of a sheet inspection device equipped with a sensor is caused to execute a setting procedure for setting a set range, a detection procedure for detecting a first detection value indicating a physical quantity of a first sheet by the sensor, and a determination procedure for determining that the first sheet is normal if the first detection value is within the set range and determining that the first sheet is abnormal if the first detection value is not within the set range. The setting procedure is a procedure for setting the set range based on a plurality of second detection values ​​detected by the sensor. The set range is a range from a first set value that is equal to or smaller than the minimum value of the plurality of second detection values ​​to a second set value that is equal to or larger than the maximum value of the plurality of second detection values. Each of the second detection values ​​indicates a physical quantity of a corresponding one of a plurality of second sheets. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a front view showing an example of an internal structure of a paper sheet processing apparatus according to an embodiment. [Diagram 2] FIG. 2 is a plan view showing an example of a sheet transported inside the sheet processing apparatus. [Diagram 3] FIG. 3 is a block diagram showing the above-mentioned sheet processing apparatus using functional blocks. [Figure 4] FIG. 4 is a graph showing a change in the number of detections of the second detection value with respect to the second detection value, and a diagram showing a detection range and an initial range, illustrating a case where the detection range falls within the initial range. [Figure 5A] FIG. 5A is a diagram showing the graph of FIG. 4, the detection range, and the initial range, illustrating a case where the detection range spans the second initial value. [Figure 5B] FIG. 5B is a diagram showing the graph and the detection range of FIG. 5A, and a set range, and shows a state in which the set range is set by shifting the initial range of FIG. 5A. [Figure 5C]FIG. 5C is a diagram showing the graph of FIG. 4, the detection range, and the initial range, illustrating a case where the detection range spans the first initial value. [Figure 6A] FIG. 6A is a graph showing the change in the number of detections of the second detection value relative to the second detection value, and a diagram showing a detection range and an initial range, illustrating a case where the detection range spans both the first initial value and the second initial value. [Figure 6B] FIG. 6B is a diagram showing the graph of FIG. 6A, the detection range, and the set range, and illustrates a state in which the set range is set by widening the initial range of FIG. 6A. [Figure 6C] FIG. 6C is a diagram showing the graph and the detection range of FIG. 6A and an initial range, illustrating a case where the variance of the multiple second detection values ​​is less than a variance threshold value. [Figure 7] FIG. 7 is a flow chart for explaining the setting modes of the sheet inspection device of the sheet processing apparatus. [Figure 8] FIG. 8 is a flowchart illustrating the setting mode, which follows FIG. [Figure 9] FIG. 9 is a flowchart illustrating the setting mode, which follows FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] First, the basic concept of the embodiment of the present invention will be described. The sheet processing device includes an inspection device (sheet inspection device) having a sensor for detecting the physical quantity of the sheet, a control unit, etc. In the inspection device, a set range (inspection parameters) such as an inspection target area and a threshold value is set in order to inspect the print quality of the sheet. The control unit determines that the sheet is normal when a detection value indicating the physical quantity of the sheet falls within the set range, and determines that the sheet is abnormal when the detection value does not fall within the set range.

[0009] However, even if each inspection device collects detection values ​​from the same paper sheet, there may be variation in detection of the physical quantity of the paper sheet among multiple inspection devices due to individual differences in the inspection devices. Therefore, it is necessary to set the setting range to an appropriate range for each inspection device. For example, in order to set the setting range to an appropriate range, it is possible for an inspector to manually adjust the setting range. However, when an inspector manually adjusts the setting range, the more inspection devices there are, the longer the work required to adjust the setting range will be, and the more laborious the inspector will be. Furthermore, adjusting the setting range is a task that requires skill.

[0010] In order to solve such problems, in the embodiment of the present invention, a sheet inspection device and a program are provided that can obtain a setting range for determining whether a sheet is normal. Next, a means and a method for solving the above problems are described.

[0011] Next, an embodiment will be described with reference to the drawings. Fig. 1 is a front view showing an example of an internal structure of a paper sheet processing apparatus 1 according to an embodiment. As shown in FIG. 1, the sheet processing apparatus 1 includes a take-out device 10, a conveying device 3, an inspection device 4 serving as a sheet inspection device, and a sorting device 7.

[0012] The take-out device 10 is a paper sheet take-out device capable of taking out one by one of a plurality of supplied paper sheets P. The take-out device 10 includes a take-out rotor 18. The take-out rotor 18 is rotatably provided and capable of taking out one by one of the plurality of paper sheets P. The conveying device 3 is configured to convey the paper sheets P taken out by the take-out device 10.

[0013] The inspection device 4 is a sheet inspection device that detects the physical quantity of the sheet P transported along the transport path of the transport device 3. The inspection device 4 performs determination of the denomination, authenticity, and damage of the sheet P, inspection of the printing state, etc. In one example, the inspection device 4 includes a first sensor 4a, a second sensor 4b, a third sensor 4c, a fourth sensor 4d, a fifth sensor 4e, and a sixth sensor 4f.

[0014] The first sensor 4a has a light source 4a1 and a photodetector 4a2. The light source 4a1 and the photodetector 4a2 are arranged opposite to each other across the conveying path of the conveying device 3. The first sensor 4a can detect a first period in which the light emitted from the light source 4a1 is blocked by the paper sheet P and the amount of light detected by the photodetector 4a2 is less than the light amount threshold, and a second period in which the light emitted from the light source 4a1 is not blocked by the paper sheet P and the amount of light detected by the photodetector 4a2 is equal to or greater than the light amount threshold. In other words, the first sensor 4a can detect a first period in which the paper sheet P passes through the first detection position 3a of the conveying path of the conveying device 3 and a second period in which the paper sheet does not pass through the first detection position 3a.

[0015] 2 is a plan view showing an example of a sheet P conveyed inside the sheet processing apparatus 1. Examples of the sheet P include a first sheet P1 and a second sheet P2, which will be described later. As shown in Figs. 1 and 2, the sheet P has a rectangular shape in a plan view. In this embodiment, the long axis of the sheet P is parallel to the conveying direction X of the conveying device 3. The sheet P has a pair of short sides SI1 and SI2 perpendicular to the conveying direction X, and long sides SI3 and SI4 parallel to the conveying direction X. The first period is a period from the time when the short side SI1 of the sheet P reaches the first detection position 3a to the time when the short side SI2 of the sheet P reaches the first detection position 3a. Therefore, taking into account the speed at which the sheet P is conveyed, it is possible to detect (calculate) the length L of the sheet P in the conveying direction X of the sheet P.

[0016] The arrangement of the light source 4a1 and the photodetector 4a2 can be modified in various ways. The light source 4a1 and the photodetector 4a2 do not have to be arranged opposite each other across the conveyance path of the conveyance device 3. In that case, the light source 4a1 can emit light toward the paper sheet P passing through the first detection position 3a on the conveyance path of the conveyance device 3, and the photodetector 4a2 can detect the reflected light reflected by the paper sheet P. Furthermore, the first sensor 4a only needs to be able to detect the length L of the paper sheet P, and various commonly known sensors, such as other optical sensors, can be used as the first sensor 4a.

[0017] 1, the second sensor 4b is configured to detect the thickness of a sheet P passing through the second detection position 3b of the conveying path of the conveying device 3. Note that the second sensor 4b only needs to be able to detect the thickness of the sheet P, and various commonly known sensors can be applied to the second sensor 4b.

[0018] The third sensor 4c, the fourth sensor 4d, and the fifth sensor 4e detect image information of the paper sheet P. The image information is, for example, luminance. The third sensor 4c is configured to detect image information of the front side of the paper sheet P passing through the third detection position 3c of the conveying path of the conveying device 3. The fourth sensor 4d is configured to detect image information of the back side of the paper sheet P passing through the fourth detection position 3d of the conveying path of the conveying device 3. The fifth sensor 4e is configured to detect transmitted image information of the paper sheet P passing through the fifth detection position 3e of the conveying path of the conveying device 3. The sixth sensor 4f is configured to detect a magnetic characteristic of the paper sheet P passing through a sixth detection position 3f of the conveying path of the conveying device 3. The magnetic characteristic is, for example, the amount of magnetic material contained in the paper sheet P. Note that the sixth sensor 4f only needs to be able to detect the magnetic characteristic of the paper sheet P, and various commonly known sensors can be applied to the sixth sensor 4f.

[0019] In addition, the inspection device 4 may be equipped with various sensors capable of detecting physical quantities of the paper sheet P, in addition to the first sensor 4a, the second sensor 4b, the third sensor 4c, the fourth sensor 4d, the fifth sensor 4e, and the sixth sensor 4f.

[0020] The sorting processing device 7 is a paper sheet sorting processing device that sorts and stacks the paper sheets P inspected by the inspection device 4. The sorting processing device 7 sorts and processes the paper sheets P based on the inspection results by the inspection device 4. The sorting processing device 7 is equipped with a plurality of stacking and bundling devices 7a, 7b, 7c, and 7d, and a rejected sheet stacking device 7f. The stacking and bundling devices 7a, 7b, and 7c are devices for stacking and bundling the paper sheets P determined to be good sheets by the inspection device 4. The stacking and bundling device 7d is a device for stacking and bundling the paper sheets P determined to be bad sheets by the inspection device 4. The rejected sheet stacking device 7f is provided at the end of the conveying path of the conveying device 3. Paper sheets P that are determined to be rejected sheets by the inspection device 4 are stacked in the rejected sheet stacking device 7f.

[0021] Fig. 3 is a block diagram showing the function blocks of the paper sheet processing apparatus 1. As shown in Fig. 3, the paper sheet processing apparatus 1 further includes a control unit 30, a storage unit 31, an operation unit 32, and a display unit 33. The control unit 30 is connected to the first sensor 4a, the second sensor 4b, the third sensor 4c, the fourth sensor 4d, the fifth sensor 4e, the sixth sensor 4f, the take-out device 10, the transport device 3, the storage unit 31, the operation unit 32, and the display unit 33, respectively.

[0022] The inspection device 4 includes a first sensor 4a, a second sensor 4b, a third sensor 4c, a fourth sensor 4d, a fifth sensor 4e, a sixth sensor 4f, a control unit 30, and a memory unit 31. The control unit 30 is shared by a plurality of devices including the inspection device 4, the take-out device 10, etc. The memory unit 31 can be shared by a plurality of devices.

[0023] The control unit 30 is configured as a computer equipped with a CPU (Central Processing Unit), a ROM (Read-Only Memory), a RAM (Random-Access Memory), etc. The control unit 30 executes a program stored in the ROM to control the overall operation of the paper sheet processing device 1, such as the operation of the first sensor 4a, the second sensor 4b, the third sensor 4c, the fourth sensor 4d, the fifth sensor 4e, the sixth sensor 4f, the take-out device 10, the conveying device 3, and the display unit 33. When the inspection device 4 includes sensors other than the first to sixth sensors 4a to 4f, the control unit 30 controls the operation of the various sensors included in the inspection device 4.

[0024] For example, the control unit 30 acquires multiple detection values ​​indicating the length L of multiple sheets of paper P from the first sensor 4a, and sets a set range for determining whether the detection values ​​are normal based on the multiple detection values. The control unit 30 also acquires detection values ​​indicating the length L of multiple sheets of paper P from the first sensor 4a, and determines that the sheets P are normal when the detection values ​​are within the set range, and determines that the sheets P are abnormal when the detection values ​​are not within the set range.

[0025] Here, the multiple sheets P used to set the set range are defined as multiple second sheets P2, multiple detection values ​​indicating multiple physical quantities of the multiple second sheets P2 are defined as multiple second detection values, the sheets P judged to be normal or not based on the set range are defined as first sheets P1, and the detection value indicating the physical quantity of the first sheets P1 is defined as first detection value. Also, each second detection value indicates the physical quantity of a corresponding one of the multiple second sheets P2. The multiple second sheets P2 are sheets of the same type. When the type of the first sheet P1 is different from the type of the second sheet P2, the inspection device 4 can judge that the first sheet P1 is abnormal. Also, even if the type of the first sheet P1 is the same as the type of the second sheet P2, the inspection device 4 can judge whether the first sheet P1 is normal or not.

[0026] The control unit 30 can control the driving of various devices of the paper sheet processing device 1, such as the take-out device 10 and the transport device 3, based on the operation of the operator via the operation unit 32. In addition, the control unit 30 can display on the display unit 33 operation information by the operator, information acquired by the control unit 30, information determined by the control unit 30, etc.

[0027] The memory unit 31 stores detection values ​​indicating physical quantities of the paper sheet P detected by the first sensor 4a, the second sensor 4b, the third sensor 4c, the fourth sensor 4d, the fifth sensor 4e, and the sixth sensor 4f. The memory unit 31 also stores a result determined based on the first detection value and the set range. The memory unit 31 also stores an initial range and a variance threshold value used to set the set range. The initial range is, for example, a range calculated based on a plurality of second detection values ​​of a plurality of second paper sheets by an inspection device of another paper sheet processing device. The variance threshold value is, for example, a threshold value calculated based on a plurality of second detection values ​​of a plurality of second paper sheets by an inspection device of another paper sheet processing device. The storage unit 31 is formed of a commonly known storage medium such as a hard disk drive (HDD), a solid state drive (SSD), etc. The inspection device 4 may be configured without the storage unit 31. The sheet processing apparatus 1 is configured as described above.

[0028] Next, a method for setting the set range based on the multiple second detection values ​​and the initial range of the multiple second sheets P2 performed by the control unit 30 will be described. Hereinafter, a method for setting the set range will be described using an example in which the physical quantity of the sheet P is the length L of the sheet P detected by the first sensor 4a. However, the means and method for setting the set range described in this specification are not limited to the means and method for determining the set range related to the length L of the sheet P. The means and method for setting the set range described in this specification can be applied to means and methods for determining the set range related to various physical quantities other than the length L, such as the thickness, brightness, and amount of magnetic material of the sheet P.

[0029] 4 is a graph showing a change in the number of detections of the second detection value DV1 relative to the second detection value DV1, and a diagram showing a detection range DR1 and an initial range IR1, illustrating a case where the detection range DR1 is within the initial range IR1. In addition, in FIG. 4, the average value AV of the multiple second detection values ​​DV1 is set as a reference value (0), and second detection values ​​DV1 larger than the reference value (second detection values ​​DV1 to the right of the reference value) are shown as positive values, and second detection values ​​DV1 smaller than the reference value (second detection values ​​DV1 to the left of the reference value) are shown as negative values.

[0030] 4, the memory unit 31 stores an initial range IR1. The initial range IR1 is a range from a first initial value IV1 to a second initial value IV2 that is greater than the first initial value IV1. The control unit 30 can record a plurality of second detection values ​​(detection range DR1) detected by the first sensor 4a in the memory unit 31. The detection range DR1 is a range from a minimum value MIN to a maximum value MAX of the plurality of second detection values ​​DV1.

[0031] 4, the detection range DR1 falls within the initial range IR1. In other words, the minimum value MIN is equal to or greater than the first initial value IV1, and the maximum value MAX is equal to or less than the second initial value IV2.

[0032] For example, if the average value AV of the multiple second detection values ​​DV1 (multiple lengths L of the multiple second sheets P2) is 160.0 mm, the maximum value MAX is 161.3 mm, and the minimum value MIN is 158.7 mm, the detection range DR1 is a range from 158.7 mm to 161.3 mm. In the initial range IR1, the first initial value IV1 is 158.7 mm or less, and the second initial value IV2 is 161.3 mm or more. When the relationship between the detection range DR1 and the initial range IR1 is as described above, the control unit 30 can determine that the detection range DR1 is within the initial range IR1, and set the initial range IR1 as the set range. The size of the detection range DR1 is 2.6 mm. The size of the initial range IR1 is greater than or equal to 2.6 mm.

[0033] Next, a case where the control unit 30 sets the set range SR1 by shifting the initial range IR2 and the initial range IR3 will be described with reference to Figures 5A, 5B, and 5C. Figure 5A shows the graph of Figure 4, the detection range DR1, and the initial range IR2, and shows a case where the detection range DR1 straddles the second initial value IV2. Figure 5B shows the graph of Figure 5A, the detection range DR1, and the set range SR1, and shows a state where the set range SR1 is set by shifting the initial range IR2 of Figure 5A.

[0034] 5A and 5B, similarly to Fig. 4, the average value AV of the multiple second detection values ​​DV1 is set as a reference value (0), and the second detection values ​​DV1 greater than the reference value are shown as positive values, and the second detection values ​​DV1 smaller than the reference value are shown as negative values. As can be seen from Fig. 4 and Fig. 5A, the initial range IR2 is different from the initial range IR1.

[0035] 5A, the detection range DR1 does not cross the first initial value IV1 of the initial range IR2, but crosses the second initial value IV2 of the initial range IR2. In other words, the minimum value MIN is equal to or greater than the first initial value IV1, and the maximum value MAX exceeds the second initial value IV2. The size of the initial range IR2 is equal to or greater than the size of the detection range DR1.

[0036] For example, regarding the second detection values ​​DV1, the minimum value MIN was 158.7 mm, the maximum value MAX was 161.3 mm, the average value AV was 160.0 mm, and the size of the detection range DR1 was 2.6 mm. Meanwhile, regarding the initial range IR2, the first initial value IV1 was 157.5 mm, the second initial value IV2 was 160.5 mm, and the size of the initial range IR2 was 3.0 mm, which is greater than the size of the detection range DR1.

[0037] As shown in Figures 5A and 5B, when the relationship between the detection range DR1 and the initial range IR2 is as described above, the control unit 30 determines that the detection range DR1 straddles the second initial value IV2 and that the size of the initial range IR2 is greater than or equal to the size of the detection range DR1, and sets the setting range SR1 by shifting the initial range IR2.

[0038] The set range SR1 is a range set by shifting the initial range IR2 overall by 1.0 mm to the positive side. The set range SR1 ranges from a first set value SV1 that is equal to or less than the minimum value MIN to a second set value SV2 that is equal to or greater than the maximum value MAX. For example, the first set value SV1 is shifted by +1.0 mm from the first initial value IV1 of the initial range IR2, and the second set value SV2 is shifted by +1.0 mm from the second initial value IV2 of the initial range IR2. The size of the set range SR1 is the same as the size of the initial range IR2, which is 3.0 mm.

[0039] In this embodiment, when the control unit 30 sets the setting range SR1 by shifting the initial range IR2, the control unit 30 makes the intermediate value M1 between the first setting value SV1 and the second setting value SV2 equal to the average value AV of the multiple second detection values ​​DV1. However, if the first setting value SV1 is equal to or less than the minimum value MIN and the second setting value SV2 is equal to or more than the maximum value MAX, the control unit 30 does not need to make the intermediate value M1 equal to the average value AV.

[0040] 5C is a diagram showing the graph of FIG. 4, the detection range DR1, and the initial range IR3, and shows a case where the detection range DR1 straddles the first initial value IV1. In FIG. 5C, similar to FIG. 4, the average value AV of the multiple second detection values ​​DV1 is set as a reference value (0), and the second detection values ​​DV1 larger than the reference value are shown as positive values, and the second detection values ​​DV1 smaller than the reference value are shown as negative values. As can be seen from FIG. 4, FIG. 5A, and FIG. 5C, the initial range IR3 is different from the initial ranges IR1 and IR2.

[0041] 5C, the detection range DR1 does not cross the second initial value IV2 of the initial range IR3, but crosses the first initial value IV1 of the initial range IR3. In other words, the minimum value MIN is less than the first initial value IV1, and the maximum value MAX is equal to or less than the second initial value IV2. The size of the initial range IR3 is equal to or greater than the size of the detection range DR1.

[0042] The second detection values ​​DV1 in Fig. 5C are the same as the second detection values ​​DV1 in Fig. 5A. On the other hand, for the initial range IR3, the first initial value IV1 was 159.5 mm, the second initial value IV2 was 162.5 mm, and the size of the initial range IR3 was 3.0 mm, which is greater than or equal to the size of the detection range DR1.

[0043] As shown in Figures 5B and 5C, when the relationship between the detection range DR1 and the initial range IR3 is as described above, the control unit 30 determines that the detection range DR1 straddles the first initial value IV1 and the size of the initial range IR3 is greater than or equal to the size of the detection range DR1, and sets the setting range SR1 by shifting the initial range IR3.

[0044] The set range SR1 is a range set by shifting the initial range IR3 overall to the negative side by 1.0 mm. For example, the first set value SV1 is shifted -1.0 mm from the first initial value IV1 of the initial range IR3, and the second set value SV2 is shifted -1.0 mm from the second initial value IV2 of the initial range IR3. The size of the set range SR1 is the same as the size of the initial range IR3, which is 3.0 mm.

[0045] In this embodiment, when the control unit 30 sets the setting range SR1 by shifting the initial range IR3, the control unit 30 makes the intermediate value M1 of the setting range SR1 equal to the average value AV. However, if the first setting value SV1 is equal to or less than the minimum value MIN and the second setting value SV2 is equal to or more than the maximum value MAX, the control unit 30 does not need to make the intermediate value M1 equal to the average value AV.

[0046] Next, a case where the setting range SR2 is set will be described with reference to Figs. 6A, 6B, and 6C. In Figs. 5A and 5C, the case where the size of each of the initial ranges IR2 and IR3 is equal to or larger than the size of the detection range DR1 is described. In Fig. 6A, a case where the size of the initial range IR4 is smaller than the size of the detection range DR2 is described, and in Fig. 6C, a case where the size of the initial range IR5 is equal to or larger than the size of the detection range DR2 but is too large is described. Here, a case where the setting range SR2 is set by widening the initial range IR4, or the setting range is set by narrowing the initial range IR5 is described.

[0047] Fig. 6A is a graph showing a change in the number of detections of the second detection value DV2 with respect to the second detection value DV2, and a diagram showing a detection range DR2 and an initial range IR4, in which the detection range DR2 straddles both the first initial value IV1 and the second initial value IV2. Fig. 6B is a diagram showing the graph of Fig. 6A, the detection range DR2, and a set range SR2, in which the set range SR2 is set by widening the initial range IR4 of Fig. 6A.

[0048] In Figures 6A and 6B, the intermediate value M3 between the first initial value IV1 and the second initial value IV2 of the initial range IR4 is set as the reference value (0), and the second detection value DV2 greater than the reference value is shown as a positive value, and the second detection value DV2 smaller than the reference value is shown as a negative value.

[0049] 6A, the detection range DR2 straddles both the first initial value IV1 and the second initial value IV2 of the initial range IR4. In other words, the minimum value MIN is less than the first initial value IV1, and the maximum value MAX exceeds the second initial value IV2. The size of the initial range IR4 is less than the size of the detection range DR2.

[0050] For example, for the second detection values ​​DV2, the minimum value MIN was 158.9 mm, the maximum value MAX was 161.0 mm, the second detection value DV2 at the intermediate value M3 was 160.0 mm, and the size of the detection range DR2 was 2.1 mm. On the other hand, for the initial range IR4, the first initial value IV1 was 159.5 mm, the second initial value IV2 was 160.5 mm, and the size of the initial range IR4 was 1.0 mm, which is less than the size of the detection range DR1.

[0051] As shown in Figures 6A and 6B, when the relationship between the detection range DR2 and the initial range IR4 is as described above, the control unit 30 determines that the detection range DR2 straddles both the first initial value IV1 and the second initial value IV2, calculates the variance of the multiple second detection values ​​DV2, and sets the setting range SR2 by widening the initial range IR4 based on the variance.

[0052] For example, the set range SR2 is a range set by expanding the initial range IR4 by 2.0 mm. The set range SR2 ranges from a first set value SV1 that is equal to or less than the minimum value MIN to a second set value SV2 that is equal to or greater than the maximum value MAX. The first set value SV1 is 158.5 mm, which is shifted by -1.0 mm from the first initial value IV1 of the initial range IR4, and the second set value SV2 is 161.5 mm, which is shifted by +1.0 mm from the second initial value IV2 of the initial range IR4. The size of the set range SR2 exceeds the size of the initial range IR4, and is 3.0 mm.

[0053] The size of the set range SR2 is determined by multiplying the variance of the multiple second detection values ​​DV2 by an arbitrary value. In FIG. 6A, for example, the variance is 0.5. If the arbitrary value is 6 mm, the size of the set range SR2 is 3 mm.

[0054] Furthermore, the control unit 30 makes the intermediate value M2 of the setting range SR2 equal to the intermediate value M3 of the initial range IR4. In this case, the control unit 30 can calculate the first setting value SV1 by subtracting half the magnitude of the setting range SR2 from the intermediate value M3 of the initial range IR4, and calculate the second setting value SV2 by adding half the magnitude of the setting range SR2 to the intermediate value M3, thereby setting the setting range SR2.

[0055] However, if the first set value SV1 is equal to or less than the minimum value MIN and the second set value SV2 is equal to or greater than the maximum value MAX, the control unit 30 does not need to make the intermediate value M2 of the set range SR2 equal to the intermediate value M3 of the initial range IR4. In addition, although the arbitrary value is set to 6 mm in this embodiment, the arbitrary value may be set to a smaller value, which enables the inspection device 4 to inspect the first sheet P1 more accurately.

[0056] FIG. 6C is a diagram showing the graph of FIG. 6A, the detection range DR2, and the initial range IR5, and shows a case where the variance of the multiple second detection values ​​DV2 is less than the variance threshold. In FIG. 6C, similar to FIG. 6A, the intermediate value M4 between the first initial value IV1 and the second initial value IV2 of the initial range IR5 is set as the reference value (0), and the second detection value DV2 larger than the reference value is shown as a positive value, and the second detection value DV2 smaller than the reference value is shown as a negative value. As can be seen from FIG. 6A and FIG. 6C, the initial range IR5 is different from the initial range IR4.

[0057] 6C, the detection range DR2 falls within the initial range IR5. In other words, the minimum value MIN is equal to or greater than the first initial value IV1 of the initial range IR5, and the maximum value MAX is equal to or less than the second initial value IV2 of the initial range IR5.

[0058] The second detection values ​​DV2 in Fig. 6C are the same as the second detection values ​​DV2 in Fig. 6A. Meanwhile, for the initial range IR5, the first initial value IV1 was 157.5 mm, the second initial value IV2 was 162.5 mm, and the size of the initial range IR5 was 5.0 mm, which is greater than the size (2.1 mm) of the detection range DR2. The second detection value DV2 at the intermediate value M4 between the first initial value IV1 and the second initial value IV2 of the initial range IR5 was 160.0 mm.

[0059] As shown in Figures 6B and 6C, when the relationship between the detection range DR2 and the initial range IR5 is as described above, the control unit 30 determines that the detection range DR2 from the minimum value MIN to the maximum value MAX falls within the initial range IR5, and calculates the variance of the multiple second detection values ​​DV2. In this embodiment, the control unit 30 determines that the variance is less than the variance threshold, and sets the setting range by narrowing the initial range IR5 based on the variance. For example, when setting the setting range, the control unit 30 may set the setting range SR2 in Figure 6B by narrowing the initial range IR5.

[0060] For example, the set range SR2 is a range set by narrowing the initial range IR5 by 2.0 mm. The set range SR2 ranges from a first set value SV1 that is equal to or less than the minimum value MIN to a second set value SV2 that is equal to or greater than the maximum value MAX. The first set value SV1 is 158.5 mm, which is shifted by +1.0 mm from the first initial value IV1 of the initial range IR5, and the second set value SV2 is 161.5 mm, which is shifted by -1.0 mm from the second initial value IV2 of the initial range IR5. The size of the set range SR2 is 3.0 mm, which is less than the size of the initial range IR5.

[0061] The size of the set range SR2 is determined by multiplying the variance of the multiple second detection values ​​DV2 by an arbitrary value. Note that the method of calculating the set range SR2 based on the multiple second detection values ​​DV2 and the initial range IR5 in Fig. 6C can be analogously applied to the method of calculating the set range SR2 described using Figs. 6A and 6B.

[0062] Furthermore, the control unit 30 makes the intermediate value M2 of the set range SR2 equal to the intermediate value M4 of the initial range IR5. In this case, the control unit 30 calculates the first set value SV1 by subtracting half the size of the set range SR2 from the intermediate value M4 of the initial range IR5, and calculates the second set value SV2 by adding half the size of the set range SR2 to the intermediate value M4, thereby setting the set range SR2. By setting the set range SR2 narrower than the initial range IR5, the inspection device 4 can more accurately inspect the first sheet P1.

[0063] However, if the first set value SV1 is equal to or less than the minimum value MIN and the second set value SV2 is equal to or greater than the maximum value MAX, the control unit 30 does not need to match the intermediate value M2 of the set range SR2 to the intermediate value M4 of the initial range IR5.

[0064] Unlike the present embodiment, the control unit 30 may set the set range SR2 to the initial range IR5 when it determines that the variance is equal to or greater than the variance threshold value. Alternatively, the control unit 30 may set the set range to the initial range IR5 without taking into account the variance of the second detection values ​​DV2.

[0065] Next, the setting mode of the inspection device 4 of the paper sheet processing apparatus 1 will be described. Fig. 7 is a flowchart for explaining the setting mode of the inspection device 4. Fig. 8 is a flowchart for explaining the setting mode following Fig. 7. Fig. 9 is a flowchart for explaining the setting mode following Fig. 8. In this embodiment, the setting mode is a mode for obtaining a setting range for determining whether a paper sheet (first paper sheet P1) is normal or not.

[0066] 7 and 1 to 3, when the setting mode of the inspection device 4 is started, first, in step S5, the control unit 30 stores the initial range IR and the variance threshold in the memory unit 31 by the operator operating the operation unit 32. Next, in step S10, the control unit 30 acquires a second detection value DV indicating a physical quantity of one of the second sheets P2 from the first sensor 4a. In the embodiment, the second detection value DV is the length L of the second sheet P2.

[0067] Thereafter, in step S15, the control unit 30 determines whether the number of detections of the second detection value DV has reached a predetermined number. If the number of detections of the second detection value DV has not reached the predetermined number, the control unit 30 repeatedly executes step S10.

[0068] As shown in FIG. 8 and FIG. 1 to FIG. 3, on the other hand, when the number of detections of the second detection value DV reaches a predetermined number (step S15), the process proceeds to step S20, and in step S20, the control unit 30 determines whether the detection range DR of the predetermined number of second detection values ​​DV falls within the initial range IR.

[0069] If the detection range DR is within the initial range IR (step S20), the process proceeds to step S25, where the control unit 30 calculates the variance of a predetermined number of second detection values ​​DV. Then, in step S30, it is determined whether the variance is equal to or greater than a variance threshold value. If the variance is equal to or greater than the variance threshold (step S30), the process proceeds to step S35, in which the control unit 30 sets the setting range SR to the initial range IR, and ends the setting mode of the inspection device 4.

[0070] On the other hand, if the variance is less than the variance threshold (step S30), the process proceeds to step S40, where the control unit 30 sets the setting range SR by narrowing the initial range IR based on the variance, and ends the setting mode of the inspection device 4.

[0071] 9 and 1 to 3, on the other hand, when the entire detection range DR does not fall within the initial range IR (step S20), the process proceeds to step S50, where the control unit 30 determines whether a predetermined number of second detection values ​​DV satisfy a first condition. Here, the first condition is a condition that the detection range DR crosses the first initial value IV1 and the size of the initial range IR is equal to or larger than the detection range DR. Alternatively, the first condition is a condition that the detection range DR crosses the second initial value IV2 and the size of the initial range IR is equal to or larger than the detection range DR.

[0072] If a predetermined number of second detection values ​​DV satisfy the first condition (step S50), the process proceeds to step S55, where the control unit 30 sets the setting range SR by shifting the initial range IR, and ends the setting mode of the inspection device 4.

[0073] On the other hand, if the predetermined number of second detection values ​​DV do not satisfy the first condition (step S50), the process proceeds to step S60, where the control unit 30 determines whether the predetermined number of second detection values ​​DV satisfy the second condition. Here, the second condition is a condition that the detection range DR straddles both the first initial value IV1 and the second initial value IV2. If the predetermined number of second detection values ​​DV satisfy the second condition, the process proceeds to step S65, where the control unit 30 calculates the variance of the predetermined number of second detection values ​​DV. Thereafter, in step S70, the initial range IR is expanded based on the variance calculated in step S60 to set the setting range SR, and the setting mode of the inspection device 4 is terminated.

[0074] If the predetermined number of second detection values ​​DV do not satisfy the second condition (step S60), the process proceeds to step S75, where the control unit 30 sets a setting range SR that includes the detection range DR (all second detection values ​​DV) and ends the setting mode of the inspection device 4. In step S75, the control unit 30 sets the setting range without taking into consideration the initial range IR, and sets the setting range without shifting the initial range IR or changing the size of the initial range IR.

[0075] In this embodiment, the inspection device 4 includes a storage unit 31, but may be configured without the storage unit 31. In that case, the control unit 30 can set the set range SR without considering the initial range IR. Specifically, the control unit 30 repeats step S10 until the number of detections of the second detection value DV reaches a predetermined number, and can set the range from a first set value SV1 that is equal to or less than the minimum value MIN to a second set value SV2 that is equal to or more than the maximum value MAX as the set range SR.

[0076] Furthermore, the control unit 30 can set the setting range SR taking into account the initial range IR but without taking into account the variance threshold. Specifically, the control unit 30 does not store the variance threshold in the storage unit 31 in step S5 of Fig. 7. If the detection range DR is within the initial range IR in step S20 of Fig. 8, the control unit 30 proceeds to step S35 without executing steps S25 and S30, sets the setting range SR to the initial range IR, and ends the setting mode of the inspection device 4.

[0077] 8, if the detection range DR does not fall within the initial range IR, step S50 is executed. If the predetermined number of second detection values ​​DV satisfy the first condition (step S50), step S55 is executed, and in step S55, the control unit 30 sets the setting range SR by shifting the initial range IR, and ends the setting mode of the inspection device 4. If the predetermined number of second detection values ​​DV do not satisfy the first condition (step S50), the control unit 30 proceeds to step S75 without executing step S60, sets the setting range SR within which the detection range DR falls, and ends the setting mode of the inspection device 4.

[0078] According to the inspection device 4 according to one embodiment configured as described above and the program executed by the computer of the inspection device 4, the inspection device 4 includes the first sensor 4a as a sensor for detecting a first detection value indicating a physical quantity of the first sheet P1, and the control unit 30. The control unit 30 can determine that the first sheet P1 is normal when the first detection value is within a set range SR, and can determine that the first sheet P1 is abnormal when the first detection value is not within the set range SR.

[0079] The control unit 30 can set a set range SR based on the second detection values ​​DV detected by the first sensor 4a. The set range SR ranges from a first set value SV1 that is equal to or smaller than the minimum value MIN of the second detection values ​​DV to a second set value SV2 that is equal to or larger than the maximum value MAX of the second detection values ​​DV. Each of the second detection values ​​DV indicates a physical quantity of a corresponding one of the second sheets P2.

[0080] According to a program executed by a computer of the inspection device 4 equipped with the first sensor 4a, the computer of the inspection device 4 can be caused to execute a setting procedure for setting a set range SR, a detection procedure for detecting a first detection value indicating a physical quantity of the first sheet P1 using the first sensor 4a, and a judgment procedure for judging the first sheet P1 to be normal if the first detection value falls within the set range SR, and judging the first sheet P1 to be abnormal if the first detection value does not fall within the set range SR.

[0081] The setting procedure is a procedure for setting a set range SR based on a plurality of second detection values ​​DV detected by the first sensor 4a. The set range SR ranges from a first set value SV1 that is equal to or smaller than a minimum value MIN of the plurality of second detection values ​​DV to a second set value SV2 that is equal to or larger than a maximum value MAX of the plurality of second detection values ​​DV. Each of the second detection values ​​DV indicates a physical quantity of a corresponding one of the plurality of second sheets P2. Therefore, it is possible to obtain the inspection device 4 and the program that can obtain the set range SR for determining whether the first paper sheet P1 is normal or not.

[0082] The inspection device 4 further includes a storage unit 31 that stores the initial range IR. When the control unit 30 determines that the detection range DR falls within the initial range IR, it can set the set range SR to the initial range IR. Therefore, the initial range IR can be utilized when setting the set range SR.

[0083] When the control unit 30 determines that the detection range DR straddles at least one of the first initial value IV1 and the second initial value IV2, it can set the set range SR by shifting the initial range IR, or can set the set range SR by widening the initial range IR. In this case, too, it is possible to make use of the initial range IR when setting the set range SR.

[0084] When the set range SR is set by shifting the initial range IR, the control unit 30 may set the intermediate value between the first set value SV1 and the second set value SV2 of the set range SR to the average value AV of the second detection values ​​DV. This allows the inspection device 4 to inspect the first sheet P1 more accurately.

[0085] When the control unit 30 determines that the detection range DR straddles both the first initial value IV1 and the second initial value IV2, it calculates the variance of the second detection values ​​DV and widens the initial range IR based on the variance, thereby setting the set range SR. In this case, too, the initial range IR can be utilized when setting the set range SR.

[0086] The storage unit 31 further stores a variance threshold. When the detection range DR falls within the initial range IR, the control unit 30 calculates the variance of the multiple second detection values ​​DV. When the control unit 30 determines that the variance is equal to or greater than the variance threshold, it can set the set range SR to the initial range IR. On the other hand, when the control unit 30 determines that the variance is less than the variance threshold, it can set the set range SR by narrowing the initial range IR based on the variance. In this case, too, the initial range IR can be utilized when setting the set range SR.

[0087] From the above, it is possible to set the set range SR taking into consideration the individual differences of the multiple inspection devices 4. Then, it is possible to obtain an inspection device 4 that can reduce the effort required to deal with the individual differences of the multiple inspection devices 4 and can automatically set the set range SR even if the operator is not an expert.

[0088] Although the embodiment of the present invention has been described, the above embodiment is presented as an example and is not intended to limit the scope of the invention. The above novel embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. The above embodiment and its modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0089] 1...paper sheet processing device, 3...conveyor device, 4...inspection device, 4a to 4f...sensors, 10: take-out device, 30: control unit, 31: storage unit, DR: detection range, DV: second detection value, MIN: Minimum value, MAX: Maximum value, AV: Average value, IR: Initial range, IV1...First initial value, IV2...Second initial value, SR...Setting range, SV1...First setting value, SV2: Second set value, M1-M4: Intermediate value, P: Paper, P1: First paper, P2: second sheet, L: length, X: conveying direction, S5 to S75: steps.

Claims

1. a sensor for detecting a first detection value indicating a physical quantity of the first paper sheet; a control unit that determines that the first sheet is normal when the first detection value is within a set range, and determines that the first sheet is abnormal when the first detection value is not within the set range, The control unit sets the set range based on a plurality of second detection values ​​detected by the sensor, the setting range is a range from a first setting value that is equal to or smaller than a minimum value of the plurality of second detection values ​​to a second setting value that is equal to or larger than a maximum value of the plurality of second detection values, Each of the second detection values ​​indicates a physical quantity of a corresponding one of the plurality of second sheets of paper. Paper sheet inspection equipment.

2. A storage unit that stores an initial range from a first initial value to a second initial value that is greater than the first initial value, The control unit is setting the set range based on the initial range and the plurality of second detection values; When it is determined that the detection range from the minimum value to the maximum value falls within the initial range, the set range is set to the initial range. The paper sheet inspection device according to claim 1 .

3. A storage unit that stores an initial range from a first initial value to a second initial value that is greater than the first initial value, The control unit is setting the set range based on the initial range and the plurality of second detection values; when it is determined that the detection range from the minimum value to the maximum value crosses at least one of the first initial value and the second initial value, the setting range is set by shifting the initial range, or the setting range is set by widening the initial range. The paper sheet inspection device according to claim 1 .

4. The control unit is When it is determined that the detection range crosses the second initial value and the size of the initial range is equal to or larger than the size of the detection range, or When it is determined that the detection range crosses the first initial value and the size of the initial range is equal to or larger than the size of the detection range, Setting the set range by shifting the initial range. The sheet inspection device according to claim 3.

5. When setting the set range by shifting the initial range, the control unit causes an intermediate value between the first set value and the second set value to coincide with an average value of the plurality of second detection values. The paper sheet inspection device according to claim 4.

6. The control unit is When it is determined that the detection range spans both the first initial value and the second initial value, calculating a variance of the plurality of second detection values, and setting the set range by widening the initial range based on the variance; The sheet inspection device according to claim 3.

7. A storage unit that stores an initial range from a first initial value to a second initial value greater than the first initial value and a variance threshold value, The control unit is setting the set range based on the initial range and the plurality of second detection values; If it is determined that the detection range from the minimum value to the maximum value falls within the initial range, a variance of the second detection values ​​is calculated; If it is determined that the variance is equal to or greater than the variance threshold, the set range is set to the initial range; if it is determined that the variance is less than the variance threshold, set the set range by narrowing the initial range based on the variance. The paper sheet inspection device according to claim 1 .

8. A computer of a paper sheet inspection device equipped with a sensor A setup procedure for setting the setting range; a detection step of detecting a first detection value indicating a physical quantity of the first paper sheet by the sensor; a determination step of determining that the first sheet is normal when the first detection value is within a set range, and determining that the first sheet is abnormal when the first detection value is not within the set range; A program for executing the setting step is a step of setting the set range based on a plurality of second detection values ​​detected by the sensor, the setting range is a range from a first setting value that is equal to or smaller than a minimum value of the plurality of second detection values ​​to a second setting value that is equal to or larger than a maximum value of the plurality of second detection values, Each of the second detection values ​​indicates a physical quantity of a corresponding one of the plurality of second sheets of paper. program.

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