JPH057757B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a paper sheet discrimination device that discriminates paper sheets such as banknotes while conveying them.

(B) Conventional technology Conventionally, for example, as a discrimination device for distinguishing the type of banknote, a gate sensor (detection sensor) and an image sensor (pattern sensor) are provided on the conveyance path, and after the gate sensor detects the passage of the banknote, the image sensor There is a system that recognizes the shape, pattern, etc. of banknotes by activating the banknotes, and uses the recognition results to differentiate and distribute 1,000 yen, 5,000 yen, etc. This kind of conventional banknote validating apparatus performs the validating process one by one.

(c) Problems to be Solved by the Invention In the above-mentioned conventional apparatuses, each banknote is discriminated one by one, and the conveyance, discrimination, and sorting of the banknotes based on the discrimination results are performed repeatedly in sequence. While this method does not cause problems such as patterns being recognized all at once, there is a limitation in that the processing speed cannot be increased beyond a certain level.

Therefore, to further increase the processing speed, 1
It is not necessary to process banknotes one by one, but to perform banknote detection, discrimination processing, and distribution processing while continuously transporting a plurality of banknotes along a transport path from the banknote input slot to the distribution unit.

However, when a plurality of banknotes are continuously conveyed on a conveyance path, unless the signal output of each sensor such as a banknote detection sensor and a pattern sensor is organized and processed, it becomes impossible to determine which banknote the signal belongs to, resulting in control failure. There is a possibility that it will be possible. For example, when a bill has a torn hole in the middle, when bills that are folded in two are continuously conveyed, or when bills are conveyed continuously due to poor payout control, the bill detection sensor The output cannot correspond to the output of a pattern sensor such as an image sensor, and accurate discrimination processing cannot be performed.

This invention has been made by focusing on the above-mentioned problem, and when a plurality of sheets of paper are conveyed along a conveyance path, the detection signal of the passage detection sensor and the target sheet whose pattern is recognized by the pattern sensor are used. It is an object of the present invention to provide a paper sheet discrimination device that can accurately discriminate paper sheets by matching the types of paper sheets.

(d) Means and operation for solving the problem The paper sheet identification device of the present invention includes transport means 3 and 4 that sequentially receive paper sheets and transport them at intervals; A detection sensor section S1 detects that paper sheets are carried into the means and outputs a detection interrupt signal Sa each time the detection occurs; pattern sensor sections S2 and S3 that recognize print information, etc. for each paper sheet that is conveyed by starting the process, and output recognition end interrupt signals Sb and Sc after recognition, and the conveyance speed of the paper sheet in the conveyance means. a pulse generating means 5 that outputs a time interrupt signal 5a with a frequency proportional to a second storage section CT having m storage areas corresponding to each storage area; and a third storage section CT comprising n storage areas and storing pattern recognition results by the pattern sensor section.
DT and the detection interrupt signal from the detection sensor section are sequentially received, and the detection interrupt signal Sa is received.
Detection interrupt counting means that stores the acceptance order of
CNT, ST2 and operates in response to the detection interrupt signal Sa from the detection sensor section, and transfers the memory contents of the detection interrupt counting means CNT at that time to an appropriate storage area of the second storage section CT. , the counter group corresponding to this storage area
Inhibition canceling means ST4 to ST5 write prohibition cancellation data into the storage area of the GT, and a time interrupt is received from the pulse generating means, and data other than the prohibition data is stored in the counter group GT for each interrupt. Count-up means ST18 to count up the memory contents of the storage area where the storage area is located
Upon receiving a recognition end interrupt from ST21 and the pattern sensor sections S2 and S3, the memory contents of each storage area of the counter group at the time of the interrupt are determined by the normal operation from the detection interrupt to the corresponding recognition end interrupt. By comparing with the original values (reference values TI, TM), the storage area of the counter group GT corresponding to the paper sheet for which pattern recognition has been completed at that time is specified, and the storage area of the counter group GT corresponding to this is specified. type storage means for storing type data of paper sheets, which is the recognition result of the pattern sensor unit, in the i-th storage area of the third storage unit based on the storage content i of the storage area of the third storage unit;
It is characteristically provided with ST7 to ST9 and ST11 to ST15.

This invention relates to a device in which a plurality of paper sheets are continuously conveyed one after another, and when a recognition end interrupt is received from a pattern sensor section,
The purpose is to accurately grasp the number of paper sheets detected by the detection sensor unit by the recognition result, and then perform appropriate return/recovery processing. The main operation of this invention will be explained below.

The prohibition release means operates in response to the detection interrupt signal Sa, and transfers the memory contents of the detection interrupt counting means CNT to an appropriate storage area of the second storage unit CT, and also stores the counter group corresponding to this storage area. Write prohibition release data (for example, 1) into the GT storage area.

The count up means operates every time the pulse generation means 5 generates a time interrupt, and counts up the data in the storage area of the counter group GT that stores data other than the prohibited data. Each storage area of the second storage unit stores the reception order of each paper sheet, and the storage area of the corresponding counter group stores the current position of each paper sheet corresponding to the reception order. It will be updated sequentially as a count-up value in the storage area.

Thereafter, each paper sheet undergoes pattern recognition of print information and the like by a pattern sensor section, and the pattern sensor section outputs a recognition completion interrupt signal. Here, the time from when the detection sensor section S1 detects a paper sheet until the pattern sensor sections S2 and S3 finish pattern recognition, and the reference counter value corresponding to that time.
TI and TM are known in advance.

Therefore, when receiving a recognition end interrupt from the pattern sensor section, the type storage means stores the counter group.
Identify the memory area that has the reference value in GT, and accept the paper sheet whose pattern has just been recognized from the memory contents (for example, i) of the memory area of the second memory unit corresponding to this. It is recognized that the ranking is i-th, and the type data of the paper sheet is stored in the i-th storage area of the third storage section.
Note that the term "type" here is a concept that includes the presence or absence of an abnormal condition such as the shape or pattern of the paper sheet.

In this way, since the acceptance order of each paper sheet is known based on the reference values TI and TM, the detection sensor unit S1 may generate an extra detection interrupt due to a damaged hole in the paper sheet, or Even if the pattern recognition end interrupt does not occur normally due to paper sheets being conveyed in close proximity, the type data of the paper sheets will be stored in the appropriate storage area of the third storage unit. .

The paper sheets that have been processed by the type storage means are appropriately processed by the discrimination means. That is, since the type data regarding the i-th accepted paper sheet is stored in the i-th storage area of the third storage section, the discrimination means, each time it receives each paper sheet, The type of the paper sheet is determined from the contents of the third storage area corresponding to the reception order, and return processing and sorting and collection processing are performed.

(E) Examples The present invention will be explained in more detail below with reference to Examples.

FIG. 1 is a schematic diagram showing the arrangement relationship between a banknote conveying path and sensors of a banknote validating device according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a bill validating device, which is built into an automatic teller machine or the like. Reference numeral 3 denotes a conveyance path formed within this discrimination device 1, and is adapted to convey banknotes 2 in sequence. In this conveyance path 3, a plurality of upper and lower pairs of conveyance rollers 4 are arranged at predetermined intervals in the conveyance direction, and the bill 2 is configured to be conveyed while being held between the upper and lower rollers 4. has been done.

Also, in this conveyance path 3, from the front, a gate sensor S1 (detection sensor), an image sensor S2,
A magnetic sensor S3 and a position sensor S4 are arranged with a predetermined distance in the transport direction. Here, the image sensor S2 and the magnetic sensor S3 constitute a pattern sensor for identifying banknotes.

Further, the gate sensor S1 is configured to output a detection signal every time a banknote passes when the banknote is conveyed. Note that S1 in FIG. 8 indicates the detection signal for the first image and the second image.

The image sensor S2 and the magnetic sensor S3 recognize patterns such as the shape and pattern of banknotes, and process the banknotes based on the recognition results. And these two sensors S2, S
3, as shown in FIGS. 2 and 8, performs a scanning process for predetermined lengths a and b longer than the width L of the banknote, and operates for a longer time than the passage time of the banknote. That is, in FIG. 8, regarding the signals S2 and S3, , is the passage period of the banknote, and the broken line indicates the scanning period. In addition, both sensors S2,
S3 is set according to the distance from the gate sensor S1.
The operation is started after a predetermined time delay from the rise of the detection signal of the gate sensor S1.

The position sensor S4 outputs a detection signal when a banknote is conveyed, and is provided at a checkpoint PA for banknote sorting.

Sa shown in Fig. 8 is a detection interrupt signal,
It is output at the rising edge of the detection signal of the gate sensor S1, and is used in banknote recognition processing, etc., which will be described later. Furthermore, Sb is an interrupt signal indicating the end of the operation of the image sensor S2, and Sc is an interrupt signal indicating the end of the operation of the magnetic sensor S3, which are output when the respective sensors S2 and S3 end their operations.

The conveyance path 3 is provided with a tachometer generator 5 (pulse generator) linked to the conveyance roller 4 . This tachometer generator 5 is designed to rotate in conjunction with the conveyance roller 4, and is designed to generate pulses in synchronization with the rotational speed of the conveyance roller 4, that is, the conveyance speed of the banknote, as shown in FIG. The interrupt signal 5a is generated as shown in FIG. This tachometer generator 5 is used for the purpose of counting the number of pulses from the time when the banknote reaches the position of the gate sensor S1, and the current position of each banknote is determined based on the counting result.

A sorting mechanism 6 is provided in the conveyance path 3 behind the position sensor S4. This sorting mechanism 6 distributes banknotes to the collection side based on the pattern recognition results of the image sensor S2 and the magnetic sensor S3, and is constructed by connecting a solenoid 6b to a rotatably supported flapper 6a. has been done. This solenoid 6b is activated by a detection signal from the position sensor S4.

FIG. 7 is a block diagram showing the control system of the identification device 1, in which a memory 8 is connected to the CPU 7,
Detection signals S1S and S4S from the gate sensor S1 and position sensor S4 are inputted via the I/O port 9. Further, a solenoid signal 6s for operating a solenoid 6b is outputted from the I/O port 9 via an amplifier 10.

Furthermore, the detection signal S1S of the gate sensor S1 and the pulse 5S of the tachogenerator 5 are input to the CPU 7 via the timing generation circuit 11.

2 connected to the memory 8 via the CPU 7
The timing signal of the timing generation circuit 11 is input to the two DMA control circuits 12 and 13, and the detection signals S2S and S3S from the image sensor S2 and the magnetic sensor S3 are input to the amplifiers 14 and 15 and the A/D converters 16 and 17. It is now entered via

3 to 6 show the storage area of the memory 8, CNT is a passing number counter that counts the passing order of bills passing through the gate sensor S1, and TP is a table for GT and CT, which will be described later. It is a pointer. In addition, the table pointer TP is
What is provided separately from the passing sheet counter CNT is:
This is because the table pointer TP operates as a ring counter. In other words, if the number of areas of GT and CT is m, the table pointer TP is 1
Cycle through each area of ~m and give instructions.

GT is a tachogenerator counter (hereinafter abbreviated as tachogen counter), CT is a number data table, and these are calculated by considering the number of banknotes that can be positioned between the gate sensor S1 and the magnetic sensor S3. It has m areas. In each area of the tachogenerator counter GT, the number of pulses generated by the tachogenerator 5 after the banknote reaches the gate sensor S1 is counted for each banknote. Further, in the number data table CT, the order in which each banknote passes through the gate sensor S1, that is, the first banknote, second banknote, etc., is stored in the area indicated by the table pointer TP.

The DTP is a sorted bill counter and is designed to count the order in which bills pass through the position sensor S4.

DT is a distribution data table using the contents of the number data table CT (the order in which each banknote passes through the gate sensor S1) as a pointer, and this device
It has n areas in consideration of the maximum number of banknotes that can be handled at one time. Then, in each area of the distribution data table DT, the pattern recognition results of the image sensor S2 and the magnetic sensor S3 (denominations such as 1,000 yen, 5,000 yen, etc.) are stored in the order of the passing order of each banknote through the gate sensor S1. I'm starting to do that.

Next, the software configuration and operation of this banknote discrimination device 1 will be explained based on FIGS. 8 to 14.

First, the operation when a banknote is normally conveyed will be explained. When the conveyance path 3 is driven and the banknotes begin to be conveyed, the step (hereinafter referred to as ST) in FIG.
1, it is determined whether or not there is an interrupt from the gate sensor S1. Here, when the banknote reaches the gate sensor S1, the detection signal of S1 is output as shown in FIG.
The judgment is YES. If this determination is YES, 1 is added to the passing sheet number counter CNT (ST2), and 1 is added to the table pointer TP (ST3). Furthermore, 1 is set in the first area of the tachodynamic counter GT indicated by this table pointer TP,
A process for counting the number of pulses of the tachometer generator 5 (described later) is started (ST4). Furthermore, data 1 indicating the passing order of the banknote, that is, the first banknote, is stored in the first area of the number data table CT indicated by the table pointer TP (ST5). At this timing, the contents of each area are CNT=1,
TP=1, GT1=1, and CT1=1 (see, for example, the timing of _t1 in FIG. 10).

Thereafter, the process returns to ST1 and it is determined whether or not there is an interrupt from the gate sensor S1, and the process moves to ST6 and subsequent steps until the next gate sensor interrupt Sa occurs. When the second banknote is finally conveyed, the determination in ST1 becomes YES due to the interrupt signal Sa, and the above-described operation is repeated. In other words,
Data 1 in the second area of Takojiene Counter GT
is set and counting of the number of pulses is started (ST4), while data 2 indicating that it is the second bill is stored in the second area of the data table CT. (ST5). This operation will be repeated until the banknotes run out.

On the other hand, the image sensor S2 and the magnetic sensor S3 start operating after a predetermined time from the detection signal of the gate sensor S1, and when the pattern recognition is completed, recognition completion interrupt signals Sb and Sc are output. At this timing, following the NO judgment in ST1, move to ST6,
It is determined whether or not an interrupt Sb of the image sensor S2 has occurred. Then, when the operation of the image sensor S2 is completed and the interrupt signal Sb is output, the process moves to ST7. In ST7, the number of pulses counted in each area of the tachometer counter GT is compared with a preset reference value TA, and if the tachometer stores a value smaller than the reference value TA but within a predetermined range, The area of Gene Counter GT is detected.

Here, the reference value TA is a value for identifying which banknote is the cause of the interruption when an interruption occurs from the image sensor S2 or the magnetic sensor S3. For example, assuming that the distance from the gate sensor S1 to the point where the interrupt signal Sb is generated is 110 mm, converting that distance into the number of pulses (for example, 1 pulse = 2.5 mm):
The normal number of pulses TI until the image sensor S2 stops operating is TI=110/2.5+1=45. Also,
If the distance from the gate sensor S1 to the point where the interrupt signal Sc is generated is 172.5 mm, the regular number of pulses TM until the magnetic sensor S3 completes its operation is:
TM=172.5/2.5+1=70. So, with T.I.
The reference value TA is set as the midpoint of TM as TA=(45+
70)/2≒57. Note that α, which will be described later, is TM
Since it covers both before and after, α=(TM−TA)×
It has been determined that 2=26.

In this way, the reference value TA is the image sensor S2
is larger than the regular number of pulses TI at the end of the operation of the magnetic sensor S3, and the regular number of pulses at the end of the operation of the magnetic sensor S3.
It is set smaller than TM. Therefore, for example, the first bill is normally processed and the image sensor S
2 completes the operation, the tachogen counter
If we search for data in each area of GT that is smaller than the reference value TA and within a predetermined range, the first area of the tachodynamic counter GT will be detected, and based on the contents of the same first area of the sheet count data table CT, ,
It is recognized that the banknote whose pattern has now been recognized is the first one (ST8).

Next, the pattern recognition result of the image sensor S2 is checked, and the result is transferred to the first image data specified by the memory content (=1) of the first area of the sheet count data table CT in the distribution data table DT. Store in area (ST9). And from then on 2
The image sensor S successfully prints the banknotes after the first one.
2, the above operations are repeated (ST1, ST6 to ST9).

If the banknotes are being transported normally, the operation of the magnetic sensor S3 will eventually end, the detection signal will fall, and an interrupt signal Sc will be output as shown in FIG. Then, the judgment of ST10 becomes YES,
Processing moves to ST11 and later. In this ST11, the number of pulses counted by the tachometer counter GT is compared with the reference value TA, and the table position (in the i-th area Detect heat (suppose it is hot). From this table position i, the stored contents of the same table position i of the number data table CT, that is, the passing order of the banknote (assuming that it is the jth one) are recognized (ST12), and the recognition result of the magnetic sensor S3 and the passing order of the banknote j are recognized (ST12). The correspondence relationship between the two is determined.

Next, the pattern recognition result of the magnetic sensor S3 is checked, the result is stored in the j-th area of the distribution data table DT (ST13), and the content of the i-th area of the tachodynamic counter GT is set to 0. Return (ST15). Thereafter, it is determined whether or not the banknote is finished (ST16). If the banknote is not finished, the process returns to ST1 and the above operation is repeated, and if the banknote is finished, the discrimination operation is ended.

On the other hand, in parallel with the above operation, the tachogenerator 5 sends an interrupt signal 5a proportional to the conveyance speed of the banknote.
are output sequentially. Therefore, when this interrupt (time interrupt) occurs, the process moves to ST17 and later, the data stored in each area of the tachodynamic counter GT is checked (ST18), and it is determined whether the value is 0 or not. (ST19)

If data other than 0 is stored, the data (counter value) is incremented by 1 (ST20), and if 0 is stored, nothing is done and the process proceeds to STZI. Takojiene counter
Each area of the GT is set to 1 each time a banknote passes through the process of ST4, so the number of pulses generated by the tachogenerator 5 is counted only in the area that has undergone the process of ST4.

The processing in ST18 to ST20 is sequentially performed up to the final area of the tachogenete counter GT (ST21), and when the processing up to the final table position is completed, the process returns to ST1 (ST21). It goes without saying that the processes ST18 to ST21 are performed at a much higher frequency than the other processes (ST1...ST16), that is, at intervals of 5a shown in FIG.

Next, when the banknote reaches position sensor S4,
In other words, when the check point (PA) is reached, the detection signal from the position sensor S4 causes ST22 in Fig.
The judgment becomes YES, and the number of distributed sheets counter DTP
1 is added to (ST23), and the distribution data table
Read and check the pattern recognition results from the relevant area of DT (ST24).

Next, it is determined whether collection is required based on the detection result (ST25), and if data 0 is stored in the corresponding area of DT or the pattern recognition results of image sensor S2 and magnetic sensor S3 are different, the corresponding The banknotes are processed for return. on the other hand,
If a normal pattern recognition result is stored in the corresponding area of the DT, collection processing is performed according to the banknote type. If collection is required, the collection mechanism, that is, the flapper 6a of the sorting mechanism 6 is operated for a certain period of time (ST26), and it is determined whether or not the banknotes have run out (ST27). Further, if collection is not required, the process moves to ST27, and if the banknotes are not finished, the process returns to ST22, and when the banknotes are finished, the discrimination operation ends.

As described above, the banknotes are transported normally, and as shown in FIG. 8, the Sa signal of the first banknote, the Sb signal of the first banknote, the Sa signal of the second banknote, and the Sc signal of the first banknote Signal, Sb signal of the second bill, Sb signal of the second bill
Sc, and by simply assigning the Sa, Sb, Sc signals as the first, second, etc. in the order in which they are output, position information of multiple bills on the conveyance path and bill discrimination can be obtained. By comparing the output timings of the sensors, it is possible to associate the banknotes with the identification results and sort the banknotes without error.

On the other hand, if an abnormality occurs in the conveyance state of the banknotes or the shape of the banknotes, normal banknotes are accepted, abnormal banknotes are sorted and returned, and the banknotes are processed correctly.
FIG. 9 is a time chart of the detection signals of each sensor and the interrupt signal when the first banknote has a hole, and FIG. 10 is a time chart of each timing t ₁ to t corresponding to FIG. 9. ₇ is a diagram showing the contents of each counter and table in FIG.

First, in response to the interrupt signal Sa at timing _t1 , the passing sheet number counter CNT is set to 1, the table pointer TP is set to 1, the tachodynamic counter GT and the first area of the sheet number data table CT are set to 1 (ST1
~ST5). Note that the first area of DT is 0 because no pattern check has been performed. next,
At timing t ₂ , the second rise of the first bill due to the hole causes the interrupt signal Sa to indicate that the counter CNT is 2, the table pointer TP is 2, the second area of the tachometer counter GT is 1, and the number of bills is 1. The second area of data table CT is set to 2. In addition, at this time, the tachogene counter GT
Assume that the first area of is 20.

At timing _t3 , ST7 is processed based on the interrupt signal Sb at the end of the operation of the image sensor S2, the first area 45 of the tachodynamic counter GT is detected, and the first area 45 of the sheet count data table CT is detected.
Since the area is 1, the result of pattern recognition by image sensor S2 is stored in the first area of distribution data table DT, for example, I = 1,000 (meaning that the result of pattern recognition by image sensor S2 is 1,000 yen). is stored (ST7 to ST9). However, since the content 26 of the second area of the tachodynamic counter GT deviates significantly from the reference value TA (=57), the second area of the distribution data table DT remains at 0.

At timing _t4 , an interrupt signal Sa is generated by detecting the second bill, and the number of bills passed is counted.
CNT becomes 3, table pointer TP becomes 3, and accordingly, 1 becomes 1 in the third area of tachogene counter GT.
is set, and 3 is stored in the third area of the sheet count data table CT. Next, at timing _t5 , an interrupt signal is generated when the operation of magnetic sensor S3 ends.
By Sc, when the counter value is equal to or higher than the reference value TA, TA+
The position of the tachogen counter GT corresponding to within α, that is, the data 70 of the first area is detected,
Since the first area of the number data table CT is 1, M=1,000 (meaning that the pattern recognition result of the magnetic sensor S3 is 1,000 yen) is stored in the first area of the distribution data table DT. Ru. After this, the corresponding first area of the tachometer engine counter GT is returned to zero. TA due to the interrupt signal Sb of the second banknote at timing t ₆
> Data 45, which is a count value and is within a predetermined range, is detected in the data generation counter GT, and since the stored content of the third area of the sheet count data table CT is 3, the data 45 is detected in the third area of the distribution data table DT. For example, store I=10,000. Next, at timing _t7 , the magnetic sensor S for the second banknote
The interrupt signal Sc at the falling edge of 3 causes the position of the tachodynamic counter GT where the counter value is equal to or higher than the reference value TA and within TA + α (in this case, the position of the tachodynamic counter GT is
area) and detects data 70 of the magnetic sensor S3.
As a result of pattern recognition, for example, M=10,000 is stored in the third area of the distribution data table DT.

As a result of the above, even if there is a hole in the first bill and extra bills are detected as passing through, the corresponding data in the second area of the distribution data table DT is 0, and the table pointer is Then, the first and third banknotes (first and second banknotes) are distributed.

To explain specifically, in this example, the position sensor S
4 detects the banknote three times, but in the first detection
Since the correct data about the 1,000 yen bill is stored in the first area of DT, the 1,000 yen bill is collected.In the second detection, the second area of DT is 0, so the return process is performed. On the third recognition
Since the correct data about the 10,000 yen bill is stored in the third area of DT, the task of collecting the 10,000 yen bill is carried out. Note that when the position sensor S4 detects the second bill (actually, the hole in the 1,000 yen bill), the collection operation for the 1,000 yen bill has already started, so nothing is actually returned. In other words, according to the present invention, even banknotes with holes can be processed normally as long as the holes do not affect verification by pattern recognition.

Figure 11 shows that the banknote feeding control is poor and 1
FIG. 12 is a timing chart of the detection signal and interrupt signal of each sensor when the first and second sheets are conveyed in succession, and FIG. 12 is a timing chart of each counter at each timing t ₁ to t ₄ corresponding to FIG. 11. , is a diagram showing the contents of a table.

First interrupt signal Sa at timing t ₁
The contents of each counter table according to
Same as in the figure. Next, at timing _t2 when the second banknote is detected by the gate sensor S1,
Passing sheet counter CNT is 2, table pointer
TP becomes 2, and the second tachogene counter GT
1 is set in the second area. Then, the second area of the sheet count data table CT is set to 2. However, since the banknotes are fed out in succession and close to each other, the detection signals of the image sensor S2 and the magnetic sensor S3 are continuous, and therefore the detection signals of the first banknote of both these sensors S2 and S3 are Interrupt signal Sb indicating the end of operation for
, Sc are not output, and the interrupt signal Sb when the operation of the image sensor S2 of the second banknote ends at timing _t3 , and the operation of the magnetic sensor _S3 of the second banknote ends at timing _t4 . time interrupt signal
Sc is output respectively. This occurs because the operating time of the image sensor S2 and the magnetic sensor S3 is longer than the actual passage time of the banknotes, and the two banknotes are pattern-recognized at the same time.

In the case of the above operation, the process of ST9 is not performed, so no recognition data of banknote type is stored in the first area of the distribution data table DT. Also, since the patterns of 1,000 yen bills and 10,000 yen bills are not recognized under normal conditions, the sorting data table
The data of I=NG and M=NG is stored in the second area of DT.

After that, two bills that are close to each other will be placed at the sorting point PA.
When this is reached, the following return processing is performed. That is, when the position sensor S4 detects the arrival of the first banknote, the banknote is returned because 0 is stored in the first area of the DT, and when the position sensor S4 detects the arrival of the second banknote, the DT in the second area of
Since NG is stored, the banknote will also be returned.

In addition, in the above explanation, for the sake of simplicity, it was explained that the position sensor S4 is actually arranged.
It is not necessarily limited to this, and for example, it is also possible to substitute the action of the position sensor S4 in terms of software.

To explain specifically, if the physical distance between gate sensor S1 and position sensor S4 is, for example, 200 mm, and one pulse is 2.5 mm, the distance of 200 mm is 80 mm.
(=200/2.5) pulses, so the banknote for which the counter value of the tachometer counter GT has reached 80 is the banknote that has reached the position (PA: distribution point) of the imaginary position sensor S4. Become.

In this way, when using the fictitious sensor S4, the process of ST22 in FIG. 14 is to determine whether or not the counter value of the tachodynamic counter GT has reached 80, and this determination process is as shown in FIG. This will be done at the tacho energy interrupt (ST17 to ST21). In other words, while incrementing the value of each area of the tachogene counter GT by 1 (ST20), it is determined whether the value has reached 80. If it has reached 80, then
The processing in ST23 to ST27 is performed. Note that in this case, it is natural to delete the process in ST15 and perform the process in ST15 after the banknote collection/return process.

When using the fictitious sensor S4, the banknotes recognized by the gate sensor S1 are always transferred to the sorting point PA.
(Position of aerial sensor S4) is also detected, so
An interrupt occurs in the gate sensor S1, but an interrupt does not occur in the position sensor S4, or a situation in which the interrupt is sent cannot occur, further increasing the reliability of the device.

Furthermore, in this embodiment, an image sensor S2 and a magnetic sensor S3 are provided as pattern sensors, but
Either one may be used, and the pattern sensor 1
There may be one, or conversely, three or more may be provided. Further, the pulse generator is not limited to the tachogenerator 5.

Furthermore, the present invention is applicable not only to banknotes but also to various paper sheets such as train tickets.

(F) Effects of the Invention The type storage means according to the present invention detects the counter values TI and TM that should originally exist from the counter group GT when receiving a recognition end interrupt from the pattern sensor sections S2 and S3, and stores the counter values TI and TM. Based on the detection position, it is possible to ascertain the number of accepted paper sheets for which pattern recognition has just been completed. That is, the pattern recognition results in the pattern sensor sections S2 and S3 are always grasped in correspondence with the detection signal from the detection sensor section S1 (that is, the acceptance order of paper sheets). Therefore, it is possible to accurately identify paper sheets even in continuous processing. Even if the item is returned or collected, the item can be returned or collected in an appropriate manner.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic configuration diagram of a discrimination device, FIG. 2 is a configuration diagram of the detection range of an image sensor and a magnetic sensor, and FIG. 3 is a schematic configuration diagram of a passed sheet number counter. Figure 4 is a schematic diagram of the table pointer, tachodynamic counter, and number data table; Figure 5 is a schematic diagram of the distribution data table; Figure 6 is a schematic diagram of the distribution number counter; Figure 7 is the control system. Fig. 8 is a timing diagram of each signal in the case of normal banknote conveyance, Fig. 9 is a timing diagram of each signal in the case of a hole in the banknote, and Fig. 10 is a timing diagram of each signal in the case of normal banknote conveyance. A diagram showing the contents of each counter table corresponding to the case,
Figure 11 is a timing diagram of each signal when banknotes are conveyed continuously at short intervals, and Figure 12 is a timing diagram of each signal.
FIGS. 13 and 14 are control flow diagrams of the discrimination device, showing the contents of each counter and table corresponding to the case shown in FIG. 1: Identification device, 2: Banknote, 3: Conveyance path, 4: Conveyance roller, 5: Tacho generator, 6: Sorting mechanism, 7: CPU, 8: Memory, 9: I/O port,
11: Timing generation circuit, 12, 13: DMA
Control circuit, CNT: Passing number counter, TP: Table pointer, GT: Tachogenerator counter table, CT: Number of sheets data table.

Claims (1)

[Scope of Claims] 1. Conveying means 3 and 4 that sequentially receive paper sheets and convey them at intervals, and detecting that paper sheets have been carried into the conveying means. A detection sensor section S1 outputs a detection interrupt signal Sa for each paper sheet, and after this detection sensor section detects the arrival of paper sheets, it starts operating after a predetermined time and prints information etc. on each paper sheet that is conveyed. pattern sensor sections S2 and S3 that recognize and output recognition end interrupt signals Sb and Sc after the recognition; and pulse generation means 5 that outputs a time interrupt signal 5a with a frequency proportional to the conveyance speed of paper sheets in the conveyance means. and a counter group that has m storage areas and stores prohibited data in each storage area in the initial state.
GT, a second memory section CT having m memory areas corresponding to each memory area of this counter group GT, and a third memory section CT having n memory areas and storing the pattern recognition results by the pattern sensor section. a storage unit DT, and detection interrupt counting means CNT, ST that sequentially receives detection interrupt signals from the detection sensor unit and stores the reception order of the detection interrupt signals Sa.
2, and a detection interrupt signal Sa from the detection sensor section.
, and transfers the memory contents of the detection interrupt counting means CNT at that time to an appropriate memory area of the second memory unit CT, and also transfers the memory contents of the detection interrupt counting means CNT to an appropriate memory area of the second memory unit CT, and also transfers the memory contents of the counter group GT corresponding to this memory area. An inhibition release means ST that writes inhibition release data to
4 to ST5, and a count up means ST18 which receives a time interrupt from the pulse generation means and counts up the memory contents of the storage area in the counter group GT in which data other than the prohibited data is stored for each interrupt. ~ST21, upon receiving a recognition end interrupt from the pattern sensor sections S2 and S3, the memory contents of each storage area of the counter group at the time of the interrupt are stored according to normal operations from the detection interrupt to the corresponding recognition end interrupt. The original value determined (reference value TI,
TM), the counter group corresponding to the paper sheet for which pattern recognition has been completed at that time is determined.
The storage area of the GT is specified, and based on the storage content i of the corresponding storage area of the second storage section, the pattern sensor section is stored in the i-th storage area of the third storage section. Type storage means ST7 to ST for storing type data of paper sheets as recognition results
9. Steps ST11 to ST15 operate after the operation of this type storage means is completed, and grasp the acceptance order and type of each paper sheet based on each storage area of the third storage unit DT and its respective storage contents. , a paper leaf discrimination device comprising: discrimination means ST22 to ST27 for processing return/collection of each paper leaf.