JPH0646425B2 - Banknote attitude determination device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention is an apparatus for automatically determining the authenticity, denomination, front and back, etc. of inserted bills, for example, an automatic depositing machine and a money changing machine used in a financial institution. The present invention relates to a banknote attitude determination device suitable for use in a banknote processing device.

[Background of the Invention] With respect to the current four denominations of banknotes, three new denominations will be issued soon, and a total of seven new and old denominations will be distributed in the market for the time being.

On the other hand, in financial institutions and the like, in recent years, a device for automatically inserting bills of plural denominations into a batch and automatically discriminating between authenticity, denomination, obverse and reverse, and damage has started to become widespread, and high-speed processing is increasingly desired. There is.

However, the new printed ticket has a light printed pattern to prevent counterfeit bills caused by copying, and the optical pattern detection tends to be significantly reduced due to stains in the distribution process. In addition, the longitudinal dimension of the new ticket is about 14 mm shorter than the current ticket, so the lateral displacement of the above-mentioned device that conveys in the lateral direction is about double (eg 16 mm for a 1,000 yen ticket → 26 mm). As a result, the conventional method for comparing the characteristics of the standard data according to the detected positional deviation with the detection data from the specific section is disclosed in Japanese Patent Publication No. 58-48.
The 956 requires a huge amount of standard data to be prepared for the front and back 4 postures, and also checks for subtle differences, which not only increases the processing time due to the complicated processing and increases the cost of the device, but also causes a rejection or an error due to indetermination. There was a risk of frequent recognition.

Moreover, the characteristics of the color of the front and back of the bill are examined.
In No. 7, complication of the device was unavoidable.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and it is an object of the present invention to more accurately determine the four postures of the front and back sides even with respect to dirt in the circulation process of banknotes and misalignment during transportation. To obtain a bill orientation determination device.

[Outline of Invention]

The new printed ticket has a feature that the density distribution of the printed magnetic ink is different between the left and right sides and the upper and lower sides as compared with the current ticket. That is, when viewed from the surface, the integrated value of the density of the magnetic ink on the right side is larger than the integrated value of the density of the magnetic ink on the left side. In addition, the central portion has a peak value of the magnetic ink density in each of the upper portion and the lower portion, and has a feature that the peak value of the magnetic ink concentration is higher in the upper portion than in the lower portion.

The present invention has been made paying attention to this point, and is characterized in that, for a banknote conveyed in the short-side direction, the first section scans the central portion of the banknote in the short-side direction. Magnetic sensor, a second magnetic sensor for scanning the central portion on the right side in the lateral direction of the banknote, and a third magnetic sensor for scanning the central portion on the left side in the lateral direction of the banknote.

Then, the output of the first magnetic sensor is input, the first peak hold circuit that detects and holds the peak value of the magnetic amount in the first half of the scanning of the bill, and the output of the first magnetic sensor are input. Then, a second peak hold circuit for detecting and holding the peak value of the magnetic amount in the second half of the scanning of the bill is held.

Further, the output of the second magnetic sensor is input, the first integrator that stores the integrated value of the magnetic amount, and the output of the third magnetic sensor are input, and the integrated value of the magnetic amount is stored. And a second integrator that

Further, the peak value of the magnetic quantity held in the first and second peak hold circuits and the integrated value of the magnetic quantity stored in the first and second integrators are input, and the combination of the bills And a determination circuit that determines a posture and outputs a determination signal.

By doing so, by comparing the peak values of the magnetic quantities held by the first peak hold circuit and the second peak hold circuit, whether the bills are conveyed at the top or below It is possible to determine whether or not it has been transported in. Further, by comparing the integrated values stored in the first integrator and the second integrator, it becomes possible to determine whether the banknote has been conveyed on the front side or the back side. That is, the determination circuit makes it possible to easily determine the four postures of the front and back.

Further, according to this, since a magnetic sensor can be used as a sensor, it is possible to provide a banknote determination device for banknotes that can more accurately determine the four postures of the front and back sides even when the banknote is soiled during the circulation process. Obtainable. Further, since the upper and lower and left and right characteristic points of the banknote are determined when determining the attitude, the attitude of the banknote can be more accurately determined from the four front-back and four-back attitudes even if the position is slightly misaligned during transportation. A determination device can be obtained.

Example of Invention

An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows a sensor arrangement according to the present invention. The banknotes 1 that have been collectively inserted are fed one by one from a separating unit (not shown) to the transport path. The conveyance path is composed of rollers 2 and 2 ′ facing each other, and while being driven by the timing belt 3, the bill 1
Hold and transport. Between the rollers 2 and 2 ', a passage detection sensor 4, an array sensor 5, 5', a magnetic sensor 6, 6 ',
6 "and optical sensors 7 and 7'are attached at symmetrical positions with respect to the center of conveyance. Further, an encoder 8 is attached to the roller 2'to generate a clock pulse every time the bill 1 advances a certain distance.

Now, the bill 1 conveyed in the lateral direction of the arrow is detected by the passage detection sensor 4 as well as its lateral dimension. The array sensor 5, 5'detects the longitudinal dimension of the banknote 1 and the amount of lateral misalignment. Further, the magnetic sensors 6, 6 ', 6 "and the reflection type optical sensors 7 arranged above and below,
The print pattern of the banknote 1 is detected by 7 '.

The signal processing circuit and timing chart of these sensors are shown in FIGS. In FIG. 2, the output of the passage detection sensor 4 is binarized by the comparator 9 into a passage detection signal Ds, which is input to the counter 11 and the control circuit 12 via the AND gate 10. In addition to the passage detection signal Ds, the control circuit 12 has an encoder clock EN of the encoder 8.
The clock pulse CP from the pulse generator 13 is also input, and the control signal TY that causes the counter 11 to count the encoder clock EN while the bill 1 is passing is issued.
The counting result of the counter 11 becomes the lateral dimension YL of the bill 1.

The control circuit 12 issues a scanning signal TA to operate the multiplexers 14 and 14 'when the array sensors 5 and 5'approximate the central position of the banknote 1 being passed, and the array sensors 5 and 5'are operated. Sequentially scan the output. Array sensor 5,
The output of 5'is binarized by the comparators 9'and 9 ", and the counters 11 'and 11" count the left and right margins and the number of lights by the bill 1. The count value of the counter 11 ″ becomes the left side positional deviation amount ST of the bill 1, and the count values of the both are added by the adder 15, and the result becomes the longitudinal dimension XL.

In this way, the lateral dimension YL and the longitudinal dimension XL of the banknote 1 are input to the comparison unit 16 and compared with the standard data from the ROM 17 which stores the standard data of each denomination, and the determination of the first determination unit 18 is made. The resulting primary denomination flag KF1 is issued to the second determination unit. The primary denomination flag KF1 may be limited to only one denomination, or may be classified into multiple denominations.

19, 19 ', which amplifies the output of the magnetic sensor 6, 6', 6 ",
The outputs M0, M1 and M2 of 19 "are encoder clocks E
Multiplexer 2 that operates with the scanning signal Tp in synchronization with N
It is input to the AD converter 21 via 0. The AD-converted magnetic outputs are sequentially temporarily stored in the RAM 22 and then input to the comparison unit 16 '.

On the other hand, the magnetic output M1 is the peak hold circuits 23, 23 ',
The magnetic outputs M0 and M2 are input to integrators 24 and 24 ', respectively. The peak hold circuits 23 and 23 'are controlled by the timing control signals TF and TR shown in FIG.
The peak values PF and PR of the first half and the second half of the magnetic output M1 obtained by scanning the center of the are respectively held. The comparator 25 compares the peak values PF and PR with each other, and in the case of FIG. 3, outputs a flag FR of “H” indicating that the latter half of the peak value PR is larger.

The integrators 24 and 24 'are controlled by the control signal Ts, and while the bill 1 is passing through the magnetic sensors 6 and 6 ", the left and right magnetic outputs M are output.
0 and M2 are integrated, and the integrated values SL and SR are compared to the comparator 2
Output to 5 '. Comparator 25 'has integrated values SL, SR
Are compared, and in the case of FIG. 3, the integrated value SR of the right side M2
The flag LR of "H" indicating that the value is larger is output.

The flags FR and LR of these calculation results are compared with the comparison unit 16 'and RO.
It is input to M17 '. The ROM 17 'has a primary denomination flag KF1, a right side positional deviation amount ST, and a calculation result flag F.
The standard pattern data is output to the comparator 16 'according to the input information of R and LR. In the comparison unit 16 ', standard data and RA
After comparing and collating with the pattern data PD from M22, the secondary denomination flag KF2, the primary true / false flag TF1, the first
The next attitude flag SF1 is issued to the third determination unit as the determination result of the second determination unit 26.

Incidentally, if each flag is supplementarily explained, the secondary denomination flag KF
In some cases, 2 is limited to only one denomination, and in some cases, the plural denomination flag is set without being classified. The primary attitude flag SF1 may also be limited to one attitude, or a plurality of attitude flags that straddle the front and back may be set, and the primary true / false flag TF1 is also the same.

The signal processing circuit of the third determination unit 27 is shown in FIG. 4, but the pattern outputs X and Y on the front and back sides obtained from the reflection type optical sensors 7 and 7 that detect the printing pattern of the bill 1 from the front and back sides are respectively detected by the comparator 28. , 28 ', 28 "and 29, 29', 29". Comparators 28, 28 ', 28 "and 29,
Threshold voltages V ₀ <V ₁ <V ₂ generated by resistance voltage division of the power supply are connected to the other input terminals of 29 ′ and 29 ″, respectively.

The output waveforms are shown in FIG. 5, where the passage detection signals Tx and Ty of the banknote 1 and the comparator 2 are output from the comparator 28 ″ 29 ″.
Bright pattern signals LX and LY from 8'and 29 ', comparator 2
Dark pattern signals DX and DY are output from 8 and 29, respectively. The passage detection signals Tx and Ty and the encoder clock EN are input to the control circuit 12, and the counters 30 and 3 are input.
0'is a control signal TD for counting the dark pattern signals DX and DY, and counters 31 and 31 'are bright pattern signals LX and LY.
A control signal TL for counting is issued. Counter 31,3
1'denotes a light pattern signal L on the front and back for a specific section according to the control signal TL, for example, a period from the paper edge to 20 mm.
The lengths of X and LY are counted, and the counters 30 and 30 'count the lengths of the front and back dark pattern signals DX and DY according to the control signal TD.

The outputs of the counters 30 and 30 'are input to the subtractor 32,
The size difference DM (= DX-DY) of the dark pattern signal on the front and back sides and the outputs of the counters 31 and 31 'are input to the subtractor 32, and the size difference LM (= LX-LY) of the bright pattern signal on the front and back sides is calculated. The obtained data are input to the comparison unit 16 ″. In the comparison unit 16 ″, at the timing of the control signal TM from the control circuit 12 ′,
The second denomination flag KF2 from the second determination unit 26, the first
The standard data of the denomination and the attitude according to the next attitude flag SF1 are read from the ROM 17 'and compared and compared with the obtained dimensional differences LM and DM, and the final judgment values are the denomination flag KF, the true / false flag TF, and the attitude flag. Output SF.

The denomination flag KF designates one denomination, the posture flag SF designates the front and back, and the true / false flag TF designates the presence / absence of a reject. The authenticity flag TF includes, in addition to the reject based on the counterfeit note determination result,
It is also used as a reject designation when it cannot be limited to one denomination or when the front and back cannot be determined.

As described above, according to the embodiment, as is apparent from FIG. 1, the magnetic sensor 6 ′ detects the magnetic distribution of the central portion of the bill 1, and the magnetic sensors 6 and 6 ″ detect the center of the bill 1 on the left and right sides. After the amplification, the output of the magnetic sensor 6'is input to the peak hold circuits 23, 23 ', and the circuits 23, 23' output the magnetic output of either the upper or lower side of the bill 1. Holds the peak value.
The output of the magnetic sensor 6 is input to the integrating circuit 24, and the output of the magnetic sensor 6 "is input to the integrating circuit 24 '. Therefore, if the values of these circuits 23, 23', 24, 24 'are compared and judged, It is possible to uniquely determine the front and back four postures of the bill 1. For example, the peak hold circuit 2
If the value of the peak hold circuit 23 is larger than the value of 3 ', the bill 1 has been conveyed at the top, and if the value of the integration circuit 24 is larger than the value of the integration circuit 24', the bill is In Fig. 1, it can be determined that the front side is the front side and the upper side is the front side in FIG. Similarly, by comparing and determining the values of these circuits 23, 23 ', 24, 24', it is possible to determine whether the bill 1 is front or back.

〔The invention's effect〕

As is clear from the above description, the present invention focuses on the characteristics of the density distribution of the magnetic ink of the new printed ticket, that is, the density distribution on the left and right, and on the top and bottom sides of the bill conveyed by the magnetic sensor. Since a posture can be determined, a posture determination device for a bill, that is, a bill that can more accurately determine four postures of the front and back sides even with respect to dirt in a circulation process of a new printed ticket and positional deviation during transportation. Obtainable.

[Brief description of drawings]

FIG. 1 is a sensor layout diagram showing an embodiment of the present invention, and FIG.
FIG. 4 and FIG. 4 are configuration diagrams of the same embodiment, and FIGS. 3 and 5 are waveform diagrams of essential signals for explaining the operation. 6,6 ', 6 "... Magnetic sensor, 7,7' ... Reflective optical sensor, 12,12 '... Control circuit, 16,16', 16" ...
Comparing unit, 18 ... First determining unit, 23, 23 '... Peak hold circuit, 24, 24' ... Integrator, 26 ... Second determining unit, 27 ... Third determining unit, 32 , 32 '…… Subtractor

Claims (1)

[Claims] 1. A first magnetic sensor for scanning a central portion of a banknote conveyed in the lateral direction in the lateral direction of the banknote, and a central portion on the right side of the banknote in the lateral direction of the banknote. A second magnetic sensor, a third magnetic sensor that scans the central portion on the left side of the banknote in the lateral direction, and an output of the first magnetic sensor are input, and the magnetic quantity of the first half of the banknote is calculated. A first peak hold circuit that detects and holds a peak value, and a second peak that receives the output of the first magnetic sensor and detects and holds the peak value of the magnetic amount in the second half of the scanning of the bill. A hold circuit, a first integrator that inputs the output of the second magnetic sensor and stores the integrated value of the magnetic amount, and an output of the third magnetic sensor that inputs the integrated value of the magnetic amount And a second integrator for storing The peak value of the magnetic amount held in the hold circuit and the integrated value of the magnetic amount stored in the first and second integrators are input, the attitude of the banknote is determined from the combination thereof, and a determination signal is output. A bill attitude determination device comprising a determination circuit.