JPS61156391A - Money type discriminator for paper money - 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 [Field of Industrial Application] The present invention relates to a banknote denomination discriminating device suitable for use in automatic currency exchange machines, automatic vending machines, and the like.

[Prior Art] 1. As is well known, automatic currency exchange machines, vending machines, etc. internally determine the authenticity and denomination of inserted banknotes.

Now, as a method for distinguishing the denomination of banknotes, many methods have been put into practical use that are based on the size of banknotes. FIG. 8 is a schematic plan view showing an example of these methods, and this method is called a span detection method. That is, this method uses a reference sensor 1 and a plurality of detection sensors 2, 2...
- is installed on the banknote conveyance path, and when the rear end 3a of the reference sensor NC banknote 3 is applied, which detection sensor 2, 2...
Depending on whether K detects the banknote 3, the size of the banknote in the conveying direction (hereinafter referred to as "one dimension") is measured, and the size of the banknote is determined based on this.However, in this method, the size of the banknote is determined. It is necessary to provide a number of detection sensors 2, 2, etc. corresponding to the types of the detection sensors 2, 2, .

Furthermore, this method does not provide flexibility when banknotes are revised. On the other hand, there is a clock counting method as another discrimination method. In this method, one detection sensor is installed on the banknote transport path, and one dimension of the banknote is determined from the counted value by counting clock pulses while the banknote passes through the detection sensor. This method does not have the drawbacks of the span detection method described above, but if the moving speed of the banknote or the period of the clock pulse changes, accurate measurement cannot be made and there is a risk of misidentification of the denomination. In order to overcome this problem, a mechanical timing correction counting method was devised in which the value counted by the clock counting method is corrected by a count value obtained by counting the number of revolutions of the mechanical system of the banknote conveyance unit, such as a gear.However, this method However, if the bill slips and the moving speed fluctuates, it cannot be dealt with, and there is a risk of misidentifying the denomination.

In view of the above circumstances, this invention has been developed in a small space and at low cost.
Moreover, this summer is not affected by fluctuations in the moving speed of banknotes, etc.
It is an object of the present invention to provide a banknote denomination discriminating device that can reliably measure the dimensions of a banknote and, based on this, can discriminate between incorrect denominations.

[Means to solve the problem]

In order to achieve the above object, the present invention measures the time when a banknote passes a fixed point using a clock pulse, and uses this clock pulse to time a banknote to travel a certain known distance from the fixed point. The method is characterized in that the size of the banknote is determined from the calculation result by measuring the time and calculating the ratio between the time required to travel this known distance and the time used to pass the fixed point. do. Further, the present invention is characterized in that the known distance is set to a value within a range of 1 or less in one dimension of the largest banknote among the circulating banknotes and 1 or more in one dimension of the smallest banknote.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a banknote denomination discriminating device according to an embodiment of the present invention, FIGS. 2 and 3 are a front view and a plan view showing a banknote conveyance path, and FIG. FIG. 2 is a block diagram showing the configuration of a discrimination device. In Figure 1, 1
, 2 are light emitters, and 3 and 4 are light receivers. These light emitter 1, light receiver 3 and light emitter 2, light receiver 4 are
It is installed at a predetermined location on the banknote conveyance path of an automatic money changer or the like. That is, as shown in FIGS. 2 and 3, the banknote M has two belts P provided on each of the upper and lower sides.

Which belt P connects the conveyance path R between P and Q?

It is sandwiched between P, Q, and Q, and moves from the left to the right in the diagram. The light emitter 1 and the light receiver 3 and the light emitter 2 and the light receiver 4 are arranged opposite to each other in the center of the transport path R, with the light emitter 1 and the light receiver 3 facing each other in the front in the transport direction. Further, a light emitter 2 and a light receiver 4 are arranged at the rear in the transport direction, each separated by a predetermined distance in the transport direction. Here, the predetermined distance is the length in the longitudinal direction of the smallest new 1,000 yen bill among circulating banknotes, that is, the dimension in the transport direction (simply referred to as the 7 dimensions as described above), and The length is within the range of 174 m or less, which is the "dimension" of the 10,000 yen bill per day, which is the largest among circulating banknotes.In this case, the specified distance is 1
The most desirable value is around 1621II, which is between 50 dragons and 174 dragons. When the light receivers 3 and 4 are receiving light from the light emitters 1 and 2, they output an off signal, while the bill M advances along the conveyance path RKG and the light emitters 1 and 2 When the light from the sensor is blocked, it outputs an on signal. The signal from the photoreceiver 3 is supplied to a one-shot 5 and a first input of an AND gate 6, and the signal from the photoreceiver 4 is supplied to a one-shot 7. One shot 5 detects the rising edge of the signal supplied from the optical receiver 3 and sets a flip-flop (hereinafter referred to as F/F toss) 8, and one shot 7 detects the rising edge of the signal supplied from the optical receiver 4. and reset F/F8. The output signal of F/F 8 is then supplied to the first input terminal of AND gate 9. On the other hand, 10 is an oscillator that supplies a pulse signal of a predetermined frequency to the second input terminals of AND gates 6 and 9. Further, 11 and 12 are counters, which count the output signals of AND gates 6 and 9, respectively.
Count values CN, and CN.

is supplied to the discrimination device 13.

Next, FIG. 4 is a block diagram showing the configuration of the discrimination device. In the figure, 14 is a CPU (central processing unit), which performs banknote discrimination and the like. Further, 15 is an I10 port, which supplies the count values supplied from the counters 11 and 12 to the pass line BL of the CPU 14. Also, 16
is a ROM (IJ-only memory) in which programs used for processing by the CPU and discrimination data shown in FIG. 5 are stored. Here, the discrimination data is the denomination data of each circulating banknote, new 1ooO (yen), aooo (Pl), etc.
・, and ratio data [L92° [L95...] corresponding to these denomination data, and the ratio data is composed of the "dimension" Ll of the banknote indicated by the denomination data by the light emitting device 1 and This is a value LL4 obtained by dividing the light receiver 3 by a predetermined distance between the light emitter 2 and the light receiver 4. This value corresponds to the size of the banknote and is a unique value for each circulating banknote. On the other hand, 17 is a RAM (random access memory) for data storage.

The operation of the bill discriminating device having the above configuration will be explained below. 6 and 7 respectively show the state in which the banknote MI (new 1,000 yen bill) with the shortest "dimension" and the banknote MA (old 10,000 yen bill) with the longest dimension 1 proceed along the conveyance path R. FIG. When the bill MI (MA) advances on the conveyance path R 1-1, the leading edge MIF (MAF) of the bill reaches the light emitter 1, an on signal is output from the light receiver 3, and the rise of this on signal is triggered by one shot) 5. It is detected and F/F8 is set. As a result, pulses are simultaneously output from the AND gates 6 and 9 at a frequency equal to the frequency of the excavator 1o, and the number of pulses is counted by the counter 11.
and is counted by the counter 12. Then, the banknote MI (MA) travels along the conveyance path R in the right direction □ in FIGS. 6 and 7. First, in the banknote MI shown in FIG. pass through. Then, the output of the light receiver 3 becomes 'L' and the counter 6 stops counting.On the other hand, the counter 7 continues counting.
Then, when the tip MIF of the banknote MI reaches the light emitter 2,
An ON signal is output from the light receiver 4, and its rising edge is detected by K (one shot), and the F/F 8 is reset. As a result, the output of AND gate 9 becomes ``L'',
The counter 12 stops counting. In the case shown in FIG. 6, counters 11 and 12 both count while the banknote travels the distance from point A to point B, while banknote MI counts the distance from point B to point 0. While the vehicle is moving, only the counter 12 counts (hereinafter, the distance counted by only one counter is referred to as the "independently counted distance"). Therefore, the counter 12 counts more than the counter 11 while the bill MI progresses from point B to point 0, and as a result, the counter 12 counts more than the counter 11.
The count value CN of the counter 1.1 is larger than the count value CN of the counter 1.1. On the other hand, in the banknote MA shown in FIG. 7, after the front end MAF of the banknote passes through the light emitter 2, the rear end MAR of one banknote MA passes through the light emitter 1. Therefore, while the banknote MA progresses from point A to point 0, the counter 11
and 12 both perform the counting, while only the counter 11 performs counting from the time when the banknote MA starts at 0 until it reaches a. Therefore, the individual counting distance is CD, and the counter 11 counts more than the counter 12 while the banknote MA progresses from point 0 to point D. As a result, the count value cN1 of the counter 11 is larger than the count value CN of the counter 12. And these count values CN and cN! CP via I10 boat 15
Supplied to U14.

Here, V1 oscillator lO which is the traveling speed of banknote MI(MA)
Let T be the period of the pulse output from the banknote MI(MA
) is Ll, then CN, = ψ,
...This becomes song (2).

In this case, V is determined by the fluctuation of the motor rotation speed and the banknote MI (
MA) and T varies by the slip of the oscillator 1
0 fluctuates under the influence of temperature.

Therefore, the average speed of the banknote MI (MA) while it passes the light emitter 1 in FIGS. 6 and 7 is 1, and the average period during that time is 1, and If the average speed of the banknote MI (MA) while traveling from 1 to the light emitter 2 is 12, and the average period therebetween is TE, then the above formula +11. +21 will be each.

Here, in the present invention, the distance between the light emitting device 1 and the light emitting device 2 is the size of the smallest banknote among the circulating banknotes, or more than 1 or 9, and the maximum size is 0 or less. As a result, the sum of the individual counting distance ■ when the shortest banknote MI is transported and the single counting distance when the longest banknote MA is transported (lower) 1c' + cD ) is 0, which is the minimum value among the sums of the individual counting distances when the light emitter 2 is installed at an arbitrary position on the transport path R and the shortest and longest banknotes MI and MA are transported, that is, The sum of the individual counting distances when the shortest and longest banknotes MI and MA are conveyed is minimum and constant when the light emitter 2 is located within the above range, and outside the above range, it leaves the range. The sum of the individual counting distances is minimum, which means that when all banknotes are conveyed, the average value of the individual counting distances traveled by the banknotes is the minimum, and at the same time, the sum of the individual counting distances is the minimum. This means that the average time it takes to travel a distance is small.

Therefore, by installing the light emitter 2 within the above range, while the banknote travels the single counting distance, fluctuations in the transport speed and cycle T of the banknote are minimized, and the average speed is reduced to a minimum. and h and the average period 〒, and ↑ are approximately the same no matter what size banknotes are conveyed, i, 212 ...... (
5)〒1χ〒2 °−°−°
It becomes T61.

As a result, the formula +31. (4), , (FTl and (6
), the ratio of CN and CN is as follows. That is, the count value CN and the count value CN.

The ratio CN, /CN! is equal to the ratio L1/I between one dimension "Li" of the detected banknote and the predetermined distance.The CPU is
If count value CN1 and count value CN are input,
The ratio CN, /CN, between CN and CN is calculated, and ratio data having a value equal to this calculation result is searched from the discrimination data in the ROM. In this case, the contents of the denomination data recorded in correspondence with the ratio data matching the ratios CN and 10N are the denominations of the banknotes that have traveled along the transport path R.

In this way, even if the speed V and the frequency T of the banknote passing through the conveyance path R take on different values each time the banknote passes, the banknotes can be reliably distinguished without being affected by this. .

〔Effect of the invention〕

As explained above, 1. According to this invention, the time for a banknote to pass a fixed point is measured by a clock pulse, and the clock pulse is used to time the time for a banknote to travel a certain known distance from the fixed point.1. By calculating the ratio between the time required to travel this known distance and the time used to pass the fixed point, the size of the banknote is determined from this calculation result. Even if the speed V of the banknote passing through R and the frequency T at that time are different values each time the banknote passes, the banknotes can be reliably discriminated without being affected by this. Furthermore, according to the present invention, the known distance is set to a value in the range of 1 dimension or less of the largest banknote and 1" or more of the smallest banknote among the circulating banknotes. Even if the speed V and frequency T of the banknotes fluctuate, the detection error caused by this is minimized, and banknotes can be reliably discriminated without error.Furthermore, according to the present invention, a small space and low cost are realized. can do.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a banknote denomination discrimination method according to an embodiment of the present invention, FIGS. 2 and 3 are a front view and a plan view showing a banknote conveyance path, and FIG. FIG. 5 is a block diagram showing the configuration of the discriminating device, FIG. 5 is a diagram showing the contents of discrimination data, and FIGS. 6 and 7 are for banknotes with the shortest dimension in the transport direction and banknotes with the longest dimension in the transport direction, respectively. FIG. 8 is a schematic plan view showing an example of a conventional denomination discrimination method.・・・・・・Receiver (1°3 and 2 and 4 are in position), 10...
...Oscillator, 11.12...Kakunta (11
. . . 1st clocking means, 12 . . . 2nd clocking means), 14 . Road, L, group, specified distance. Figure 1 Figure 2 Figure 3 Figure 8

Claims (1)

[Claims] In a banknote denomination discriminating device that discriminates the denomination of various banknotes based on their respective dimensions in the conveyance direction, a first position sensor provided in a conveyance path and a position where the first position sensor is provided. a second position sensor disposed at a predetermined distance from the minimum value to the maximum value of each dimension in the transport direction; a first timer for measuring the time required; a second timer for measuring the time required for the banknote to travel between the first position sensor and the second position sensor; Banknote denomination discrimination, comprising a calculation means for calculating a ratio of time measurement results by the first and second time measurement means, and a discrimination means for determining the denomination of the banknote from the calculation result of the calculation means. Device.