JPS59180794A - Paper money discrimination system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a banknote system, such as an automatic teller machine, that discriminates a plurality of banknotes inserted at once and processes them differently depending on the result. Regarding a banknote discrimination method in a processing device, the present invention enables banknote discrimination to be performed with high precision and at high speed.

[Prior art and problems]

Conventionally, in order to identify banknotes, for example, as shown in Fig. 1,
Multiple determination units 1. II and -III are arranged in a cascade pattern, and each of the judgment sections ■ to 1■ judges the basic appraisal elements, respectively, and what is judged as NG by the judgment section ■ is judged by the judgment sections ■ and ■. (If a note is determined to be a genuine infrared ticket that appears to be a defaced or counterfeit note, and even if it is OK in the determination unit I, it is determined as NG in the determination unit Therefore, even if one of the judgment sections ■～■ was judged as NG, the other two judgments would be judged as ``O.''
However, due to the cascade system, if one judgment is judged as NG, the other judgments are automatically judged as NG.In such a system, the money is In order to increase the reception rate for species determination to 97 or more, even if the individual reception rate in each determination section is set to 9996, it is insufficient and will not improve the service.However, if the determination criteria is lowered, the final There are many errors in the appraisal, and only when these three determination units have a 99% different denomination rate, for example, can a misidentification (different denomination determination) level of 10-6 be achieved.

Next, the internal structure of the automatic deposit machine for lump sum deposit will be explained with reference to FIG.

Now, when the user inserts a plurality of banknotes Bl into the input slot 1 at once, the banknotes are temporarily transferred to the special equipment section 3 at a bell 2.2' in the bundled state. Then, from this batch of banknotes B2 in the standby state, by the action of the feeding rollers 4, 5 and the separation roller 6,
The sheets are fed out one by one and fed to the next discrimination section 8 by a conveyance roller 7. When both the front and back sides are authenticated by the discrimination sensors 81 and 82 in the discrimination section 8, the gate 9 is operated according to the result, and if the bill is a genuine bill, the gate 9 guides the bill to the store section 10, and rejects the defective bill. In this case, you will be guided to return gate 11 at gate 9. Note that solid-line arrows indicate the transfer route for legitimate banknotes, and broken-line arrows indicate the transfer route for defective banknotes. When the user presses a confirmation button, the pusher 13 is lowered by the motor 12, and the genuine banknotes B3 stored in the store are stored in the safe 14 from the store. In the unlikely event that the user presses the cancel button, the banknotes in the store are returned all at once to the return slot 11 along the route indicated by the white arrow, and are returned as banknotes B4.

In this way, the processing of banknotes differs depending on the discrimination result in the discrimination section 8. To explain the contents of this discrimination, while the banknotes are being transferred by the conveyance rollers 19, 19', the thickness sensor 15 such as a micro switch is used to detect the thickness of the banknotes being fed out, and only one banknote is sent accurately. Did you come here?2
A check is performed to see if more than one sheet overlaps. Next, optical sensors 16 and 16' detect the leading and trailing ends of the banknote being transferred, and the size of the banknote in the transport direction is determined based on the transit time. As a result of size discrimination, if the bill is not within the allowable size, it is returned to the return slot 11 as a defective bill.

If there is no abnormality in size, the next discrimination sensors 81 and 82 carry out pattern discrimination on both the front and back sides, and the denomination is discriminated.

The banknote discrimination section generally has a structure as shown in FIG. By mechanically regulating the position so that it does not move or shift in the width direction of the passage, the area read by the discrimination sensor is always kept constant. However, a certain degree of deviation must be tolerated, and in order to be able to match even if there is a slight deviation,
Since the pattern P of the banknote must be compared using a relatively simple area, highly accurate identification is difficult, and depending on the degree of defacement such as scratches or stains on the banknote, there is a risk of a misidentification. Moreover, it is difficult to precisely control the position of small banknotes. Note that the shaded area 18 indicates the area scanned and read by the banknote discrimination sensors 81 and 82.

In addition, if the banknote path is set strictly, no matter how many times the same banknote is inserted and passed through, it will always pass through the same path. When the banknotes are no longer recognized, a cancellation operation is performed and the banknotes B3 in the store section 10 are returned to the return slot 11, thereby making it possible to forge banknotes.Also, in order to improve the identification accuracy, banknotes can be counterfeited. If patterns are matched even in complicated parts of the pattern, the entire contents of the reference pattern memory must be read out and matched, resulting in the disadvantage that the discrimination process takes too much time.

[Purpose of the invention]

An object of the present invention is to provide a banknote discrimination method that improves the above-mentioned problems caused by the fact that the discrimination process takes too much time and the discrimination parts are connected in a cascade.

[Structure of the invention]

In order to achieve this objective, the banknote discrimination method of the present invention:
In a device that discriminates the denomination by comparing a reading pattern read from a dispensed banknote with a preset reference pattern, a plurality of sensors and a reference data holding means are provided, and the majority decision principle is based on the outputs of the plurality of sensors. The invention is characterized in that the discrimination is carried out based on the following.

[Embodiments of the invention]

An embodiment of the present invention will be described based on FIGS. 3 to 10.

3 shows a schematic configuration diagram of the present invention, FIGS. 4 and 5 are diagrams explaining the state of the sensor, FIG. 6 is a configuration diagram of an embodiment of the present invention, FIG. 8 and 9 are diagrams for explaining the operation, and FIG. 10 is a diagram for explaining the banknote insertion direction.

Before explaining the present invention in detail with reference to one embodiment, its outline will be explained with reference to FIG.

In the present invention, for example, determining sections 1 to (2) are provided, and the output thereof is comprehensively determined by a comprehensive discrimination determining section. In this case, the judgment section ■
If 4 of the 5 items from ~■ have made the same determination, the denomination is determined based on this. As a result, unlike the case in which the determination units (1) to (V) are connected in cascade, it is possible not only to significantly increase the bill acceptance rate and improve the service, but also to perform accurate denomination determination.

Next, an embodiment of this banknote discrimination system will be described in detail based on the drawings. 5 is a plan view of the discrimination section, 19 is the upper conveyance roller in FIG. 2, 17.17' is the guide 17, 1 in FIG.
This is a banknote guide corresponding to 7'. As in the case of FIG. 2, the banknotes are fed between the guides 17.degree. and 17' by the conveyance rollers 7, and then conveyed to the discrimination section by the conveyance rows 219 and the lower conveyance rollers (not shown). The discrimination section is provided with two lower discrimination sensors 81 and two upper discrimination sensors 82,
Patterns on both the front and back sides of banknotes are read, for example, magnetically. Further, two skew detection sensors Tl and T2 are arranged at an interval d in the width direction of the banknote passage.

Sensor groups Wl and W2 are arranged on both the left and right sides of the area through which banknotes pass in the banknote path, that is, the discrimination section. Sensor group W1. W2 is for detecting the passage position of the banknote at both the left and right ends in the width direction of the aisle, and is composed of a plurality of sensors w1, W2, etc. arranged at regular intervals in the width direction of the aisle. ing. In order to detect the position more accurately, it is better to arrange more sensors W1, W2, etc., but it is difficult to arrange such a large number of sensors W1 to W16 in one row in the passage width direction. Therefore, as shown in the figure, the banknotes are arranged diagonally and in two rows, shifted from the direction in which the banknotes travel. This sensor group W1. When a banknote passes over W2, 7- Both ends el and e2 of the banknote in the path width direction are connected to each sensor Wl-
Depending on which sensor W2... is blocked, the positions of both ends el and e2 of the banknote in the discrimination section and the width of the banknote can be detected. If the width of the banknote is detected, the denomination of the banknote can be predicted. Therefore, in the current Japanese yen, assuming that notes from 500 yen to 10,000 yen are processed, the distance between the two outermost sensors W1 and Wl is wider than the horizontal dimension of the 10,000 yen note, and the distance between the two outermost sensors W1 and W1 is wider than the horizontal dimension of the 10,000 yen note. The interval between Will and Wl6 is 5
The layout is such that it is narrower than the horizontal dimension of a 100-yen note.

Ll and L2 are optical discrimination sensors that optically read the pattern of the banknote and detect the pattern from the shading of the printed color. In the illustrated example, the light-emitting element and the light-receiving element are both located above the passing bill, which is a reflective type, but it may also be a transmissive type, in which the passing bill is placed between the light-emitting element and the light-receiving element. .

Among these sensors, sensor group W1. W2 and the skew detection sensors Tl and T2 are used to temporarily distinguish the denomination by detecting the position and skew of the passing banknote, as well as the amount of optically transmitted light of the banknote. , 82 and the optical sensors Ll, L2 are for reading the pattern of the banknote by electrically converting the amount of optically reflected light or electrically converting the amount of magnetic magnetization. .

The amount of skew (skew angle) of the banknotes fed out one by one is detected based on the time difference between when the leading edge e3 of the banknote is detected by the side skew detection sensors T1 and T2.

By passing a bill through the discrimination section having such a configuration, the discrimination sensors 81 and 82 detect and read the pattern of the bill. That is, assuming that the reading area 20, 20' indicated by the diagonal line on the banknote passes under the discrimination sensor 82, the data read from this reading area is compared with the reference pattern set in the memory in advance. Ru.

Similarly, the lower discrimination sensor 81
is read and compared with the reference pattern.

On the other hand, the reference pattern is stored in the memory in the form of a model map as shown in FIG. The model map corresponds to the reading area 20' in FIG.
The corresponding one is also made in the same format as in Fig. 7. To create a model map, one
It is set with data of 180".

Next, FIG. 6 will be explained.

(1) Position detection units 100, 101 The position detection unit 100 (left) is connected to the individual sensors W1 to W1 of the width direction sensor group W1 (Fig. 5), and the position detection unit 101 (right) Individual sensors W1 to W16 of the width direction sensor group W2 are connected. Each of the sensors W1 to W16 is provided with a light emitting source and a detection element facing each other. W1~
When the end of the bill comes between W16, for example, when the bill is placed on W16, W16 is shielded from light and W1 to W15 are opened.

This is sent as a binary code to the width detection circuit 102 and the track detection circuit 103.

The detection timing of the position detection circuits 100 and 101 is TI
, T2 output via a data collection timing generation circuit'. (Fig. 6 not shown) (2) Width detection circuit 102 The width detection circuit 102 calculates the width as the sum of the number of sensors Wl and W2 that are shielded from the binary code sent from the position detection units 100 and 101. Send data.

For example, the upper and lower limits of ``Hori'', ``Maruboshi'', and 10,000 yen are set in the denomination cutting width range setting section 104 in advance, and this range and the width data are compared and determined by the sheet metal type determination section 105, and the width is set to ``1,000''. Four types are sent: ``Maruboshi,''``Man,'' and ``Outside specified range.'' There are cases where two or three of the four types are sent on the same banknote.

For example, if the setting value of the denomination cutting width range is set to a wide range of upper and lower limits that individually allow all denominations, in such a case, the accuracy of width discrimination will decrease and it will be necessary to allow a large bill width. become.

(3) Trunk detection circuit 103 The track detection circuit 103 receives the binary code sent through the position detection unit 100 from the width direction sensor on the Wl side.
For example, as shown in FIG. 5, the data is divided into 16 parts such as w1 to W1611- and sent. This is 'l'l
, T2.82. The position of a pattern reading sensor such as Ll is checked against standard pattern data set in advance with high precision using the banknote edge as a reference, and the standard pattern data can be specified from the track width with the banknote edge as a reference.

(4) Skew detection operation The outputs of the skew detection sensors Tl and T2 are sent to the gate G as analog outputs through amplifiers AI and A2. Game) G is a type of level detector that converts the presence or absence of banknotes in r1 or T2 into a binary code, and sets the timer T to start counting and stops counting.

Counting is automatically reset within the timer circuit from the set data. The set data is a pulse output created from the leading data of TI and T2 at the banknote end, and the 5TOP data is created from the trailing data of 'I'l and T2. Game) One inclination direction sent from G sends data as a "+" inclination when T1 precedes T2 and the end of the banknote passes, and in the opposite case as a "-" inclination.

12- (5) Skew value converter 106 The output of timer T and the output of G are input to the skew value converter 106, and the counted time data from timer T is converted into a skew angle. This conversion is calculated from the physical distances of TI and T2 and the count value of the timer 10, and it is possible to calculate the angle in units of, for example, 1°. Also, the direction can be determined from the tilt direction data.

The skew value range setting unit 107 sets the absolute value of the skew angle, for example, in order to reduce the matching time and simplify processing, since when a banknote fed with a large inclination at the peripheral edge is compared with a standard pattern, the degree of matching is poor. If the angle exceeds 15°, this setting unit 107 sets 15° as a value to stop the denomination determination process in advance.
Set to .

The skew amount determining section 108 compares the set value with the skew angle data, and if the skew angle data is larger than the set value, sends unidentifiable (NG) data to the "denomination determining section".

Furthermore, the skew angle data and skew direction data from the skew value converter 106 are sent to the address generator 109 .

(6) Data collection timing generation circuit 110 The data collection timing generation circuit 110 receives data from T1 and T2. These T1. The data from T2 is passed through an amplifier circuit, and a level detector ('lrx,
Tz) is detected, and the data collection time gate is opened by the monomulti circuit. On the other hand, a pulse signal from the oscillator 111 (therefore, the sampling timing for data collection during the gate opening is periodically sent to the data time division circuits 112 to 115).

Further, the zone division timing generation circuit 116 divides the sampling timing data by 1/8 and the delay circuit 11
7 and is sent to the encoding circuit section 118 as a timing pulse. The delay circuit 117 is used to set the timing for transferring the encoding circuit section 118 and its data to the memory section 119.

(7) Discrimination sensors 81 (82) and Ll (L2) These sensors 81 (82) and Ll (L2), like sensors Tl and T2, have very small sensor outputs, so the amplifier circuit A3. It is an analog output that is amplified through A4, and is sent to the data time division circuits 114 and 115, and is sent to the data time division circuits 114 and 11 in synchronization with the timing pulse.
Sampled at 5.

(8) Encoding circuit section 118 Encoding circuit section 118 includes encoding circuits 118-1 to 118-.
Consists of 4. These encoding circuits 118-1 to 118-
4 is a sum value or an average value after A/D conversion of the data sampled at a predetermined timing interval, and if it is within the preset upper and lower limit range, it is Bi.
memory section 11 at each zone division timing as "tlo".
9 for each sensor.

Therefore, the memories 119-1 to 119-4 have a memory capacity equal to the number of banknote zone division timings, and in this example, the memory capacity is divided into eight parts.

(9) Output Judgment Unit 120 The output judgment unit 120 outputs NG data or OK data, and inputs the output levels from the data time division circuits 112 to 115 for each sensor for each data collection timing pulse, and then outputs the individual data. It is determined whether the output range setting unit 121 falls within the upper and lower limit values. If it is out of the setting, OK data is sent if NG data is sent.

(1@ Sensor-specific memory data selection section 122 The sensor-specific memory data selection section 122 selects the memories 119-1 to 119.
-4 data is selectively collected for each sensor and sent to the standard memory address generation unit 109. It has a function of sending the type of sensor to the memories 119-1 to 119-4 and the standard memory address generation unit 109.

(lυ Standard memory address generation unit 109 receives the track number from the track detection circuit 103, the skew angle and direction from the 16-row value conversion unit 106, and also receives the skew angle and direction from the sensor-specific memory data selection unit. A sensor selection signal is sent from 122. These data are sent as an address to standard pattern address selection section 123.

Further, sensor data is sent from the sensor-specific memory data selection section 122 to the standard pattern address selection section 123 via the standard memory address generation section 109 in synchronization with the data at the address. This address data is structured as shown in FIG.

(1) Standard pattern address selection section 123 The standard pattern address selection section 123 takes in address data from the standard memory address creation section 109 and according to this data is shown in FIG.

8 Bi of sensor data from the sensor data judgment table
Search for the corresponding value of t.

The sensor data judgment table is in the standard pattern data section 12.
4 and is housed in the standard pattern address selection section 123.
You can easily reduce the amount of searches.

In the bit configuration diagram in Figure 7, addresses are created using a 12-bit configuration, but in reality, sensor data judgment tables with the same configuration are aggregated at address (2), and 4 x 128 types of sensor data judgment tables for each direction of aggregation are standard. It is stored in the pattern data section 124. This address (1) output from the standard memory address creation unit 109
The address conversion from the address to the aggregate address (2) is performed by the standard pattern address selection section 123 by reading out the ROM.

Further, standard data is sent from the standard pattern data section 124 to the direction-based denomination data section 125 via the standard pattern address selection section 123. At this time, the banknote insertion direction is
As shown in Figure 0, there are four types, and the four types are extracted as data.

Of course, these four types for each direction are included in the 128 types.

(In the 1st floor sensor data judgment table Figure 9, Bo-Be is the registered data of the pattern of the optical or magnetic sensor. In this figure, A and E are the output data, respectively.) ■~0 etc. are defined as follows.

■・・・・・・A denomination [phase]・・・B denomination■・・・・・・C denomination■・・・・・・Non-denomination Blank・・・・・・Gold The standard pattern data section 124 stores 4 x 128 types of denomination, non-denomination non-specified patterns, and a sensor data determination table as shown in FIG. 9, and the address (2) output from the standard pattern address selection section 123 Accordingly, one type out of 128 types is selected for all four directions. There are five or more types of standard data output data (pattern sensors A to E) shown in FIG.

α迀 Denomination Comprehensive Judgment Unit 127 The denomination comprehensive judgment unit 127 makes a comprehensive judgment on the inserted banknotes in the following manner.

■ From the skew determination unit 108 19- ■Oblique angle θ≦15°→OK @　　　　　　θ〉15°→Determined as outside the normal denomination.

■ From the output determination unit 120 ■Setting level white judgment → OK ＠Excessive level or judgment that the denomination is outside the normal denomination is too small shall be.

■ Based on the width data from the sheet metal type determination unit 126 ■Specific denomination width → OK @ or out of denomination → judgment outside of normal denomination as width shall be.

(2) As a result of the sheet denomination determination by the standard pattern data unit 124, (2) the specific denomination is determined as a normal banknote, and the temperature is determined as 0, which is outside the normal denomination; In addition, in the case of ■, it is possible to cut a fixed amount of 20, including the direction of the denomination, as mentioned above.

As shown in FIG. 9, the gold S comprehensive determination section 127 determines the denomination determination state of pattern sensors A and H according to the direction of the banknote, and makes a majority decision. In this case, the number of pattern sensors is 5, usually 515, but if the banknote is dirty,
In the case of printing misalignment, shrinkage due to water exposure, abnormalities in banknotes, multiple folds, or crumpled banknotes, etc.
As shown in FIG. 9, this may occur with other denominations. Therefore, we look for 415 things in each direction.

When two or more types of 415 occur at the same time, it is determined that the denomination is outside the normal denomination. Furthermore, if even one type of non-denomination occurs, it is determined that it is a non-denomination. Majority logic is not used for this non-denomination.

As a result of the above, when ■ and ■ are OK, and furthermore, when the judgment denominations of ■ and ■ are the same, that denomination is designated as a comprehensive judgment as a result of discrimination.

If any one of the cases ■, ■, ■, and ■ is determined to be a normal denomination, the denomination is comprehensively determined to be outside the normal denomination.

If ■ and ■ are OK, and the determination results of ■ and ■ are not the same denomination, it is determined that the denomination is not normal.

Although not shown in Fig. 7, the P1 or T2 facing type is used to detect changes in the amount of light transmitted through the banknote using a light source and a detector, pass through an amplifier circuit, level slice the output, and measure time using a timer. It is also possible to determine the length of the rear banknote length in the same way as the width determination, and it can also be used in the same manner as in (2) above. Furthermore, it is also possible to mechanically use a microswitch to determine the thickness of a banknote and use it as a normal banknote thickness when the thickness is less than a set range and incorporate it into the above-mentioned comprehensive determination.

Q51 Processing control section 128 The processing control section 128 performs comprehensive processing control so that each section shown in Fig. 6 performs organically linked processing, and is activated by detecting insertion of a banknote at T1 or T2 and performs the following sections. It is controlled by a 16-bit CPU.

■Reading and writing timing of memories 119-1 to 119-4.

(2) Reading and judgment timing of the level output judgment unit 120;

■Data reading and data sending timing of standard memory address creation unit 109;

(2) Reading and judgment timing of the skew amount judgment unit 108.

■Reading judgment timing of width data sheet metal type judgment unit 105.

(2) Data reading and data sending timing of the standard pattern address selection section 123 and the standard pattern data section 124.

■Reading and sending timing of 125 copies of denomination data by direction.

■Data reading, judgment, and data sending timing of the sheet metal building judgment unit 105.

■Data reading judgment and data sending timing of the denomination comprehensive judgment unit 127.

■Data reading, counting, and data sending timing of the sheet number counting section 129.

23- (2) Data reading and data sending timing of the line control unit 130.

〔Effect of the invention〕

According to the present invention, it is possible to perform discrimination based on comprehensive judgment using multiple sensors instead of cascade judgment based on each sensor, so it is possible to improve the acceptance rate without lowering the judgment criteria, and as a result, Service can be significantly improved.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the principle of a conventional banknote discrimination system, Fig. 2 is a conventional banknote discrimination device, Fig. 3 is a schematic configuration diagram of the present invention, and Fig. 4 is a diagram explaining the principle of a conventional banknote discrimination system.
, FIG. 5 is an explanatory diagram of the sensor state of the present invention, FIG. 6 is a configuration diagram of an embodiment of the present invention, FIG. 7 is an address data configuration diagram,
FIGS. 8 and 9 are explanatory diagrams of the operation, and FIG. 10 is an explanatory diagram of the banknote insertion direction. In the figure, 100 and 101 are position detection units, 102 is a width detection circuit, 103 is a track detection circuit, 10424- is a full cutting width range setting unit, 105 is a sheet metal type determination unit, and 106
107 is a skew value conversion unit, 107 is a skew value range setting unit, 108 is a skew amount determination unit, 109 is an address creation unit, 122 is a sensor-specific memory data selection unit, 123 is a standard pattern address selection unit, and 124 is a standard A pattern data section, 126 a sheet metal type determination section, and 127 a denomination comprehensive determination section. Patent applicant Fujitsu Ltd. Representative Patent Attorney Akira Yamatani Eisai 3 Figure μ Two Sai Sn

Claims (1)

[Claims] A device that compares a reading pattern read from a fed-out banknote with a preset reference pattern to discriminate the authenticity and denomination of the banknote, comprising a plurality of sensors that extract a plurality of identification elements from the banknote; 1. A banknote discrimination method, characterized in that reference data holding means for holding reference data corresponding to discrimination elements is provided, and the discrimination is performed based on the majority vote principle based on the outputs of the plurality of sensors.