JP3209766B2 - Soiled banknote identification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soiled banknote discriminating apparatus, and more particularly to a soiled banknote discriminating apparatus capable of automatically changing a criterion for judging whether or not a banknote is a soiled banknote depending on the degree of soiling of a circulation banknote to be discriminated.

[0002]

2. Description of the Related Art Conventionally, as a device for detecting a soiled state of a banknote, there has been a banknote stain discrimination device described in, for example, Japanese Patent Application Laid-Open No. 1-223589. This device irradiates a uniform amount of light to a watermark region of a bill, detects the transmitted light amount, and compares the transmitted light amount with the contents of a dictionary data memory stored and set in advance, so that the identified bill is a dirty bill. It is to determine whether or not. It is conventionally known to discriminate a soiled state of a banknote by the above-mentioned method even in a region other than the watermark region of the banknote.

[0003]

By the way, in general, the purpose of a soiled banknote discriminating apparatus is to discriminate a soiled banknote in addition to removing extremely dirty banknotes, and to uniformly determine several percent or tens of percent as soiled banknotes. To collect.

[0004] However, in the above-mentioned conventional soiled banknote discriminating apparatus, a problem may arise because the soiling criterion serving as a criterion for determining whether a banknote is a soiled banknote is fixed data set in advance.

[0005] In other words, in the case of banknotes in circulation, the degree of fouling usually differs considerably depending on the country or region. For example, in the case of banknotes used in business districts, the degree of fouling is extremely small and beautiful. Conversely, banknotes used in amusement parks, amusement parks, and the like often have a high degree of pollution and are dirty banknotes. Therefore, if the same defacement standard is used in all regions, there will be areas where almost all of the banknotes will be judged to be genuine, uncontaminated paper, and conversely, almost all of the banknotes will be contaminated. A situation occurs in which an area to be judged comes out, and the collection rate of the soiled banknotes cannot be kept to a certain level.

A similar problem has arisen from the viewpoint of time. Generally, summer circulation bills tend to become dirty and are easily stained, whereas winter circulation bills are relatively clean and relatively clean. there were. Further, since the sensitivity of the sensor system of the apparatus changes with the passage of time, the same problem occurs when the same standard is used.

[0007] Under such circumstances, in order to cope with the above-described problems, the contamination standard is set in advance by changing the contamination standard for each region and each period, and the maintenance staff responds to the secular change of the identification device. Such periodic readjustment is very time-consuming, and there is a problem in that it cannot actually be dealt with.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to set a soiling standard corresponding to a circulating banknote in an area where a soiled banknote identification device is used, and It is an object of the present invention to provide a soiled banknote identification device that can appropriately cope with a change in a dirty standard.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a fouled bill discriminating apparatus which can automatically change a criterion for judging whether or not it is a fouled bill depending on the degree of fouling of a circulating bill to be discriminated. The above object is achieved by detecting the degree of contamination of the banknote to be identified, detecting the degree of contamination, comparing the degree of contamination detected by the means for detecting contamination with a preset contamination threshold, and the result of comparison by the comparing means. When the degree of contamination detected by the contamination detection means is greater than the contamination threshold, a fouled banknote identification device comprising a discriminating means for determining the banknote to be identified as a fouled banknote, wherein the degree of fouling of the circulation banknotes and fouling reference storage means for storing the fouling deviation which is a degree of variation in the contamination degree of the flow banknotes and fouling average is an average value, and fouling threshold storage means for storing the fouling threshold, the fouling And fouling threshold storage control means for the setting in the fouling threshold storage unit storing a defacement value as a constant passage rate based on a normal distribution consisting of fouling mean and fouling deviations stored in the quasi-storage means as fouling threshold, the fouling Initialization mode instructing means for instructing the initial setting of the average value of soiling and soiling deviation in the reference storage means, and the average value of the soiling of the banknotes which have been soiled in the initial setting mode designated by the initializing mode instructional means. First calculating means for calculating and calculating the soiling deviation, first storage control means for storing the soiling average value and the soiling deviation calculated by the first calculating means in the soiling reference storage means, A recording date storage unit in which a date at which the contamination average value and the contamination deviation are stored in the storage unit; and a date stored in the recording date storage unit. And date match determination means for determining whether or not the date of the standing match, if it is determined that no date is consistent with the date coincides discrimination means, fouling data for the previous day of the identified banknote Rights
The average value of the contamination and the contamination reference storage means
The average value with the average value of pollution stored in the
Average and the previous day's dirty date for the
A new pollution deviation, thereby calculating a new pollution average value and a new pollution deviation, and a pollution average value calculated by the second calculation means. And a second storage control means for updating and storing the stain deviation in the stain reference storage means.

[0010]

According to the present invention, there is provided a soiling threshold value storing means for storing a soiling threshold value as a reference for judging whether or not a banknote is a soiled banknote, and a fixed mode in which the soiling threshold value stored therein is fixed. An automatic update mode is provided to enable the automatic update mode. In the case of the automatic update mode, the average value of the previous day's stain, which is the average value of the stain data of the banknote to be identified the previous day, and the average of the stains already stored in the stain reference storage means. The new average value and the soiling deviation are calculated by calculating the new average value and the soiling deviation by setting the average value and the new soiling average value, and by setting the deviation of the soiling data of the bill to be identified the previous day as the new soiling deviation. A new normal distribution is determined based on the new average value and the new deviation, and the threshold for the new normal distribution is determined. The criteria of Kano judgment becomes possible to automatically change.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. Therefore, the processing operation of the entire apparatus, which is the premise of the present invention, will be described first. FIG. 5 is an external view of the soiled banknote identification device. FIG. 6 is a functional block diagram according to function. FIG. 7 is a flowchart showing the overall processing operation of the soiled banknote identification device. This will be described with reference to the flowchart shown in FIG. First, it is determined whether or not the pass level is to be changed (step S701). If the pass level is to be changed, the process of setting the pass level (step S702) and storing the authorization of the stain threshold (step S703) are performed. Since this is the main process of the invention, it will be described in detail later. If the setting has been completed or not to be changed, the operator next sets the bill in the hopper 53 (step S70).
4) Press the start key 51 (step S70)
5). When the start key 51 is pressed, the bill is taken in and carried by the carrying unit 62 (step S706),
During the transport, the banknote is identified, that is, fatigue is detected (step S707). Based on the identification result, it is determined whether the damage of the bill is serious (step S708). As a result, when it is determined that the damage is severe, the banknote is stored in the cull box 54 (step S711), and the process proceeds to step S714. On the other hand, when it is determined that the damage is within the allowable range, the identification unit 64 determines whether the bill is true or false (step S709). As a result, when it is determined that the bill is a counterfeit note, the bill is stored in the reject box 55 (Step S712), and Step S71 is performed.
Move to 4. On the other hand, if it is determined to be genuine,
Next, the comparing unit 801 and the discriminating unit 802 in FIG. 1 determine whether the banknote is a damaged banknote or a genuine banknote based on the contamination standard set at that time (step S710). As a result, when it is determined that the banknote is unfit, it is stored in the reject box 55 as in the case of a counterfeit banknote, and step S714 is performed.
Move to On the other hand, if it is determined that the bill is genuine, it is stored in the pocket of the stacker 56 through the branching unit 65 according to the denomination based on the identified denomination (step S7).
13). In step S714, the stop key 5
It is determined whether or not No. 2 has been pressed, and if it has been pressed, the process is terminated. If it has not been pressed, it is further determined whether or not all bills have been completed (step S715). If all the bills have not been completed, the process returns to step S706 and the subsequent processing is executed again. If all the bills have been completed, all the processing is completed.

Next, the configuration of the hardware according to the present invention will be described. FIG. 1 is a diagram showing a configuration of one embodiment of a dirty banknote identification device of the present invention. The pattern information of the bill optically read by the light receiving sensor 1 is stored in the photoelectric conversion unit 2.
Is converted into an electric signal. The converted electric signals are amplified for each channel by the amplifier 3, and all of them become input signals to the multiplexer 4. The multiplexer 4 sequentially selects input signals, and converts the selected signals to A / D (Anal).
og / Digital). The electric signal relating to the pattern information input to the A / D conversion unit 5 is converted into a digital signal, and is temporarily transferred via a bus 6 to a RAM (Ra).
nd Access Memory 7 is stored in the read data storage unit 71. Further, the RAM 7 further includes a stain reference storage means 72, a stain threshold value storage means 73, a level correspondence threshold value storage means 74, and an update data storage means 7.
5, and other data storage means 76. CPU
(Central Processing Unit)
8 is a means for comparing information stored in the RAM 7 based on an instruction or the like performed through the operation unit
1, discrimination means 802, contamination threshold storage control means 803, first calculation means 804, first storage control means 805, date coincidence determination means 806, second calculation means 807, second storage control means 808, power supply Start-up detection means 809, power-on operation means 810, automatic update mode operation means 8
11, and other control means 812 perform processing. The ROM 9 stores a control program. Information input by the operator via the initial setting mode instructing means 101, the mode designating means 102, and other operating means 103 of the operating unit 10 is transmitted to the operating unit interface (I /
O) is given to the CPU 8 through 11. The processing results and the like by the CPU 8 are sent to the display unit 12 via the display interface (I / O) 13 and displayed.

Next, the operation procedure of the present invention will be described. FIG. 2 is a flowchart of the initial setting and updating of the contamination standard in the present invention. In the figure, when the power is first turned on (step S1), the power-on detection means 809 in the CPU 8 detects the power-on, and the power-on operation means 810 turns on the date coincidence determination means 80.
6, second operation means 807 and second storage control means 80
And 8 are actuated. Next, the CPU 8 sets the RAM
7 is a stain reference storage means 72 and a stain threshold value storage means 73.
Average value m as shown in FIG.
Then, the contamination reference including the contamination deviation α and the contamination threshold TH are read (step S2). The update data is read from the update data storage means 75 (step S3). The update data is composed of the data of the number of sheets, the total stain, the sum of the squares of the stain, the average of the stain, and the deviation of the stain, and is a calculated value shown in FIG. Next, the date match determination unit 806 determines whether the date data matches (step S4). That is, it is checked whether or not the date when the stain reference and the stain threshold are stored in the RAM 7 is the same as the date when the power is turned on. As a result, if it is determined that they match,
Next, it is determined whether or not to perform the initial setting (step S
5). Whether or not to perform the initial setting is instructed by the operator.

FIG. 4A is a view showing an instruction screen of the operation unit 10 for instructing the initial setting mode and the like. Here, "START MODE" is a mode for selecting between a manual start mode and an auto start mode. In the manual start, the operation is started by pressing the start key, and in the automatic start, the operation is started by setting a bill. “COUNTERITIT” is a mode for selecting identification contents for identifying banknotes such as denominations, authenticity, and fouling of the banknotes. “GRAND TOTAL”
Is a mode for displaying the contents of counting. “FIT
“NESS LEVEL SET” is a mode for setting the pass rate of a soiled bill.
“TA” is a mode for designating the initial setting of the contamination standard, “MODE SET” is a mode for designating whether to automatically update the contamination standard, and the description of the other modes is omitted. .

When the operator performs the initial setting, the user selects "ST
AIN DATA ”. Step S5
If the initial setting has not been selected in, the process directly proceeds to the normal transaction processing (step S14).

On the other hand, if the initial setting is selected, the process enters an initial setting mode (step S6). Therefore, in this mode, the banknote is run (step S
7) After running a predetermined number of sheets, for example, 500 or more (step S8), a threshold value corresponding to the contamination reference and the passing level is calculated from the data P (step S8).
9, step S10). The average m of contamination and the deviation α of the contamination based on the contamination standard are calculated by the first calculating means 804 using the formula shown in FIG. In addition, the threshold value corresponding to the passing level is such that each level and the threshold value correspond to each other as shown in FIG. 6B, and are calculated by the average soiling m and the staining deviation (standard deviation) α as shown in FIG. Is done. In the example shown in FIG. 3C, the unfit bill rate is 10% at level 1, and the level is set every 10%. After the calculation, the first storage control unit 8
05 stores the average m of contamination and the deviation .alpha.
2, and the threshold corresponding to the passing level is stored and set in the level corresponding threshold storage means (step S11). Also,
The stain threshold storage control unit 803 sets the stain value that is a fixed pass rate level (any of level 0 to level 9) specified by the operator as a stain threshold (any of TH0 to TH9) in the stain threshold memory 73. The settings are stored (step S12). FIG. 4B shows an instruction screen of the operation unit 10 for setting the contamination threshold. This screen is shown in FIG.
In the instruction screen of (A), "FITNESS LEVEL
L SET ”is selected. When the storage is completed, it is determined whether or not the EXIT key has been pressed (step S13). If the EXIT key has not been pressed, data collection by running the bill continues. .

On the other hand, when the EXIT key is pressed,
The process proceeds to normal transaction processing (step S14). When the normal transaction processing is completed, the update data (data shown in FIG. 3D) is written in the update data storage means 75 of the RAM 7 (step S15), and it is finally determined whether or not an additional transaction is to be performed. (Step S16) If the additional transaction is to be performed, the process returns to step S5. If the additional transaction is not to be performed, the power is turned off (step S17) and the process ends.

If it is determined in step S4 that the date data matches, the mode selected by the operator is determined (step S18). Here, the operator previously sets “M” on the screen of the operation unit 10 shown in FIG.
Either the fixed mode or the automatic update mode is selected by the function of "ODE SET" (mode designating means 102). If the fixed mode is selected, the process returns to step S5 and the processing as described above is continued. On the other hand, when the automatic update mode is selected, the automatic update mode operation unit 811 sets the second arithmetic unit 807 and the second
Then, it is determined whether the number of update data is equal to or greater than a predetermined number (step S1).
9). If it is determined that the number is not equal to or larger than the predetermined number, the data is determined to be insufficient, and the process returns to step S5 to continue the above-described processing. On the other hand, if it is determined that the number is equal to or more than the predetermined number, the second arithmetic unit 807 performs an automatic updating process.
That is, first, an update calculation of the contamination standard is performed (step S20). Fouling average of fouling criteria, it until fouling average m (fouling criterion storage means fouling average that has been stored in 72) and the day before stored in the update data storage means 75 data by the fouling average m _a Determined by the average. That is, (m + m _a ) / 2 → m. The stain deviation is
Fouling deviation alpha _a stored in the update data storage means 75 to adopt as it is. That is, α _a → α. Next, a calculation of a threshold value corresponding to the passing level is performed (step S2).
1). As the threshold value corresponding to the passage level, a normal distribution is obtained as shown in FIG. 3 (C) from the contamination average m and the contamination deviation α obtained in step S21, and a corresponding value is obtained from the distribution state. In the example shown in the figure, the unfit bill rate is 10% at level 1.
And the level is set every 10%. When the calculation is completed, the second storage control unit 808 stores the obtained threshold values corresponding to the contamination reference and the passing level in the contamination reference storage unit 72 and the level correspondence threshold storage unit 74 in the RAM 7 (step S22). Finally, "FITNES
The level threshold selected by the operator with respect to the instruction screen shown in FIG. 4B in the S LEVEL SET "mode is stored by the contamination threshold storage control unit 803 in the contamination threshold storage unit 73 as a new contamination threshold (step S2
3), and proceed to step S5.

In the above embodiment, the update is (m + m
_a) / 2 → although the m may be m _a → m, can also be newly set with m a m and m _a in any ratio. And similarly alpha and alpha _a true for deviations alpha may be newly set at an arbitrary ratio. Further, α may be fixed and only m may be updated.

[0020]

As described above, according to the soiled banknote discriminating apparatus of the present invention, an automatic update mode in which a soiling threshold as a reference for judging whether or not a banknote is a dirty banknote is provided, and the distribution to be discriminated is provided. Since the standard for determining whether a banknote is a fouled banknote can be automatically changed based on the degree of fouling of the banknote, it is possible to set a fouling standard corresponding to a circulation banknote in a region where the fouled banknote identification device is used, and to perform timely fouling. It can respond appropriately to changes in standards. Furthermore, it can cope with the secular change of the performance of the device such as the sensitivity of the sensor system. In addition, if the automatic update mode is selected, the update is automatically performed, so that there is no need for intervention by a maintenance person or the like, and the stained banknote can be identified practically and efficiently.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a stained banknote identification device of the present invention.

FIG. 2 is a flowchart of initial setting and updating of a contamination standard in the present invention.

FIG. 3 is a diagram for explaining a stain reference, a stain threshold, a threshold corresponding to a passage level, and update data.

FIG. 4 is a diagram showing a screen for instructing each function and a screen for instructing a level corresponding to a stain threshold.

FIG. 5 is an external view of a soiled banknote identification device.

FIG. 6 is a configuration block diagram for each function.

FIG. 7 is a flowchart showing the overall processing operation of the soiled banknote recognition apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light-receiving sensor 2 Photoelectric conversion part 3 Amplification part 4 Multiplexer 5 A / D conversion part 6 Bus 7 RAM 8 CPU 9 ROM 10 Operation part 11 Operation part interface 12 Display part 13 Display part interface 51 Start key 52 Stop key 53 Hopper 54 Cal・ Box 55 Reject Box 56 Stacker

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Claims (3)

(57) [Claims] 1. A contamination detecting means for detecting the degree of contamination of a banknote to be identified, a comparing means for comparing the degree of contamination detected by the detecting means with a preset contamination threshold value, As a result, when the degree of soiling detected by the soiling detecting means is greater than the soiling threshold, the soiled banknote discriminating apparatus including the discriminating means for judging the identified banknote as a soiled banknote, and fouling reference storage means for storing the fouling deviation fouling average value is the average value is the degree of variation in the contamination degree of the flow banknotes, and fouling threshold storage means for storing the fouling threshold, the fouling reference storage means A stain threshold value storage system in which a stain value having a constant pass rate based on a normal distribution including a stain average value and a stain deviation stored in the stain threshold value storage means is set and stored in the stain threshold value storage means. Means, initial setting mode instructing means for instructing the initial setting of the average value of soiling and soiling deviation in the soiling standard storage means, and the banknotes in which the soiling has been identified in the initial setting mode designated by the initial setting mode indicating means. A first calculating means for calculating and calculating a pollution average value and a soil deviation about the first storage control means for storing the soil average value and the soil deviation calculated by the first calculating means in the soil reference storage means. A recording date storage unit in which a date at which the contamination average value and the contamination deviation are stored in the contamination reference storage unit; and a date stored in the recording date storage unit and a current date match. and date match determination means for determining whether dolphins not, fouling data of when the date by the date match determining means is determined not to match, the day before the identified banknoteー
The average value of the contamination and the average value of the contamination standard
The average value with the average value of pollution stored in
The average value of the contamination and the contamination of the
By making the deviation of the loss data a new contamination deviation ,
Second calculating means for calculating calculates the Do fouling average and fouling deviation, the second storage control for updating and storing the fouling average value and fouling deviation calculated in the fouling reference storage means by the second arithmetic means And a means for identifying a soiled banknote. 2. A power-on detection means for detecting a power-on of the entire apparatus, and when the power-on detection means detects a power-on, the date coincidence determination means and the second operation 2. The soiled banknote identification apparatus according to claim 1, further comprising: a power-on operation means for operating said means and said second storage control means. 3. An automatic update mode in which the second storage control means allows updating of the contents of the stain average value and the stain deviation stored in the stain criterion storage means; and A fixed mode for prohibiting updating of the contents of the stain average value and the stain deviation stored in the stain reference storage means; a mode designating means for designating one of the automatic update mode and the fixed mode; claim and so includes an automatic update mode operating means for operating said second operation means and the second storage control means only when the automatic update mode is designated by the means 1 or claim 2 A soiled banknote identification device according to claim 1.