JPS60230291A - Decision level setting system for print discriminator - 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 determination level setting method in a printed matter discriminating device used, for example, in a bill discriminating device for discriminating authenticity, fitness, etc. of banknotes.

[Technical background of the invention]

Conventionally, by detecting the physical quantities of banknotes, such as magnetism, color of printing ink, amount of transmitted light, and amount of reflected light, the authenticity of banknotes can be determined.
We are determining whether the product is fit or not.

When performing this determination, the determination level is determined by collecting data on the determination level of a large amount of banknotes, that is, the banknotes that are normally in circulation, and creating a frequency distribution as shown in FIG. The average value is rXJ and is "A".

rBJ is the data when the tail of each frequency distribution becomes zero,
rRlJ, rR,J are the average value rXJ and data “A”
.

This is difference data from rBJ. Also, rA'J, rR
Each level is a judgment level, and a judgment level is rA'J.
.

rB'j is a predetermined ratio of the difference data "RsJ, rR, J" or fixed values "R'1", "R'," and data "A".

This value is obtained by expanding rBJ outward.

[Problems with the background art] However, in the above-mentioned method, when determining the judgment level when a new banknote is issued, only clean notes are available at the beginning of the new banknote issue, so the method shown in Figure 2 As shown in the figure, the width between the judgment levels AI and R7 is narrower. For this reason, when new banknotes are circulated and become dirty, the detection level for the banknotes falls outside of the determination levels A/, n/, and there is a problem in that the banknotes are identified as counterfeit banknotes or waste paper bands. Ta.

[Purpose of the invention]

This invention was developed in view of the above circumstances, and its purpose is to improve the level of determination of authenticity, quality, etc. when only new printed matter exists when issuing new printed matter, and to eliminate contamination due to the distribution process. It is an object of the present invention to provide a determination level setting method in a printed material discriminating device that can be determined with consideration.

[Summary of the invention]

This invention uses the difference between the average detection level of type III and the determination level when determining the second type of printed matter, and the second type of printed matter.
The determination level for the second type of printed matter is determined based on the average value of the second type of printed matter.

[Embodiments of the invention]

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

FIG. 3 shows the configuration of a banknote discriminating device according to the present invention. That is, the banknote (printed material) 1 is conveyed on the conveyance path 2 in the direction of the arrow in the figure by a belt (not shown) or the like. A sensor 3 is provided on the transport path 2. This sensor 3 detects magnetic information or optical information by scanning the banknote 1 magnetically or optically.

The output of the sensor 3 is supplied to a discrimination circuit 4. This discrimination circuit 4 compares the detection signal supplied from the sensor 3 with a preset judgment level to discriminate whether it is genuine or false, good or bad, etc. The discrimination circuit 4 is a sensor for detecting a large amount of banknotes 1 in general circulation, such as clean banknotes and dirty banknotes, at the beginning of use of this device.

The detection signals from 3 are collected, their frequency distribution is taken, and based on this frequency distribution, as shown in Fig. 1, the average value rXJ,
Lower limit value rA'J of the authenticity determination level.

The upper limit "target and fitness judgment level rc'Jt" is determined by the difference data rR1J, rR,J between the average value rXJ and the data rAJ, rBJ when the tail of the frequency distribution becomes zero. , this difference data rR,
A predetermined proportion of J, rR, J, the above data rAJ
, rn'' extended outward is the lower limit of the authenticity judgment level, ``A'', and the upper limit is ``8'', and the value set inside the above data [AJli - a predetermined value (R3)] The fitness/damage judgment level is "0".

In addition, the discrimination circuit 4 collects the detection signals from the sensor 3 for only clean banknotes 1, and determines the frequency distribution as shown by the dotted line in FIG. It is. At this time, the discrimination circuit 4 selects between the average value of clean banknotes (new banknotes) and the lower limit value r of the determination level.
A'J, the difference between the upper limit rB'J and the judgment level rc'J (difference data) rR"t J , [B/, J , r
Calculate R's J and calculate its average value [X and difference data rR
``, J, r 驎'', and ``驎'' are stored in a memory (not shown).

Further, when a new banknote 1 is issued, the discrimination circuit 4 collects data of the detection signal from the sensor 3 for the new banknote 1 (new banknote), calculates the average value rYJ, and further combines this average value rYJ with the above-mentioned Difference data "R" stored in memory
, ”, [Kou J, rR's J Toyoshi, the lower limit [A and the upper limit [A] and the upper limit [
It is used to calculate the ``target'' of the judgment level of ``8'' and fitness.

In other words, the lower limit of the judgment level [A/l is the average value rYJ
The upper limit value ``Y'' can be obtained by subtracting the difference data ``Y'' from the average value ``Y''. . For example, a truth determination level equivalent to the distribution shown by the dotted line in FIG. 5 can be obtained. Further, the judgment level ``ri'' can be obtained by subtracting the difference data ``ni'' from the average value ``Y''.

Next, the determination level setting method of the present invention in such a configuration will be explained. For example, first, a large amount of banknotes (first type of printed matter) 1, such as clean banknotes and dirty banknotes, which are generally in circulation, are conveyed on the conveyance path 2, and are detected by the sensor 3. Then, a detection signal for the large amount of banknotes 1 is supplied to the discrimination circuit 4.

Accordingly, the discrimination circuit 4 collects data on the supplied detection signal, takes its frequency distribution, and uses the average value "X", standard deviation, etc. to determine the lower limit "A'J" and the upper limit of the authenticity determination level. "B
Determine the level of determination of integrity and fitness (C'It-). Next, only clean banknotes 1 are conveyed through the conveyance path 2, and the sensor 3
It is detected by Then, the detection signal for the banknote 1 is supplied to the discrimination circuit 4. Accordingly, the discrimination circuit 4 collects the data of the supplied detection signal, examines its frequency distribution, and determines the average value "X".

Therefore, the discrimination circuit 4 calculates the average value [difference data rR between the phantom and the lower limit value of the judgment level [A′l], J, the average value “r
” and the upper limit of the judgment level [B/I difference data “Shield” and the difference data between the average value “X” and the judgment level [C”
,'' is calculated and stored in a memory (not shown).

In such a state, the banknote 1 conveyed by the conveyance path 2 is scanned by the sensor 3. The detection signal of this sensor 3 is sent to the discrimination circuit 4 at the discrimination level rA'J to "B".
'l is compared, and if the value is satisfied, the discriminating circuit 4 determines that the bill is genuine. Further, the detection signal of the sensor 3 is compared in a discrimination circuit 4 to see if it is equal to or higher than the discrimination level ``0'', and if the detection signal is satisfied, the discrimination circuit 4 discriminates that the bill is genuine.

By the way, when the circulating banknote 1 is changed to a new one (a second type of printed matter), a small amount of the new banknote (new new note) 1 is conveyed through the conveyance path 2 and detected by the sensor 3 . Then, the detection signal for the small amount of banknotes 1 is supplied to the discrimination circuit 4. Thereby, the discrimination circuit 4 collects data of the supplied detection signals and calculates the average value rYJ. Next, the discrimination circuit 4 subtracts the difference data "R#1" stored in the memory from the average value rYJ to calculate the lower limit value of the truth/false judgment level [A 勺], and obtains the average value rYJ.
By adding the difference data "hi," from , the upper limit of the authenticity judgment level "about" is calculated, and by subtracting the difference data "t," from the average value rYJ, the fitness judgment level "c7y" is calculated.
Calculate l.

Therefore, from now on, the determination level of the discriminating circuit 4 for new banknotes 1 is the above-mentioned "A + rBl".

It becomes "σ".

As mentioned above, when changing to a new banknote, the judgment level of the new banknote is determined based on the difference between the judgment level for the old banknote and the average value of the new banknote. On the other hand, even when only clean banknotes exist, the level of determination of authenticity and fitness can be determined by taking into account dirt caused by the distribution process.

In addition, in the above embodiment, the average value [
Using ¥'I and the judgment level "A", "target", rc'j, the judgment level "A", "A", from the average value rYJ of the new banknote.
rB'J and rc'J were calculated, but the calculation is not limited to this, but also takes into consideration the width at which the frequency distribution of old banknotes becomes zero for new banknotes and the width at which the frequency distribution for new banknotes becomes zero. It is also possible to calculate the determination level "A", "approximately", "0".For example, as shown in Figure 6, the determination level of the authenticity of old banknotes is rA'J, rB'J
, the fitness level is set to ``target,'' and the average value for new notes is set to ``target.''
"r"9 width as "D", and their difference data as "vis"
J., r Peng J.

As shown in Figure 7, if the average value for new banknotes is ``Y'' and the two widths are ``target'', then the new tshi, fitness level discrimination level ``target is ry-!2'xg''. ”.

In addition, the lower limit width rD, J, which becomes zero from the average value of the frequency distribution of old banknotes for new notes, ``X'', the upper limit width ``D,'' and the lower limit, which becomes zero from the average value of frequency distribution for new banknotes rYJ, Width rD', ``h upper width rn', taking into account J,
°tsu-B ratio, judgment level "A", rTl'J,
[It is also possible to calculate C10. for example,
As shown in Figure 8, the authenticity determination level of old banknotes is rA.
'J, rB, rc'J is the fitness judgment level, r is the average value for new notes, r is about 2 widths, rD, J, rD, J, and the difference between them is "to R."

``R% J + rn'Q'', and as shown in Figure 9, the average value for 1 new banknote is ``Y'' and 1 width is rD'I.
In addition, we have explained the case where data on old circulating banknotes is collected and stored in advance.
Not limited to this, when handling new banknotes, new

Data on old banknotes may be collected together with data on regular banknotes.

〔Effect of the invention〕

As detailed above, according to the present invention, when issuing a new printed matter, it is possible to determine the level of determination of authenticity, quality, etc. when only new printed matter exists, taking into account contamination due to the distribution process. It is possible to provide a determination level setting method for a determination device.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the distribution determination level and various data of the detection signal for old banknotes, FIG. 2 is a diagram for explaining the distribution and determination level of the detection signal for new banknotes, and FIG. 5 to 5 are for explaining one embodiment of the present invention, FIG. 3 is a diagram showing a schematic configuration of a banknote discriminating device, and FIG. 4 is a diagram showing the distribution of detection signals for old banknotes, judgment levels, and various FIG. 5 is a diagram for explaining the data, and FIG. 5 is a rounding diagram for explaining the detection signal distribution, judgment level, and various data for new banknotes. FIG. 3 is a diagram for explaining the distribution of detection signals, determination levels, and various data for banknotes and new banknotes. DESCRIPTION OF SYMBOLS 1... Banknote (printed matter), 2... Conveyance path, 3... Sensor, 4... Discrimination circuit. I A Kobuj Tomoe #1 Kopimi → Ko, Me11t1 Light; I [
〉(1 person per location) Figure 1 Figure 3 Figure 2 $3 Figure

Claims (4)

[Claims] (1) In the case where the judgment level is determined statistically by collecting data on the detection level of physical quantities in multiple printed materials, the average value of the detection level of the standard first type of printed material is calculated, and means for calculating the difference data between the average value and the determination level; and a means for calculating the difference data between the average value and the determination level;
1. A determination level setting method for a printed matter discriminating device, comprising: determining means for determining the determination level of a type of printed matter. (2) When determining the setting level, the difference data is changed according to the ratio of the detection level distribution width in the standard first type of printed matter and the detection level distribution width in the second type of printed matter. A judgment level setting method in a printed matter discrimination device according to claim 1, characterized in that: (3) When determining the judgment level, the value from the average detection level to the distribution edge in the standard first type of printed matter and the value from the average detection level to the distribution edge in the second type of printed matter 2. A determination level setting method in a printed matter discriminating apparatus according to claim 1, wherein the difference data is changed according to the ratio of the difference data to the difference data. (4) Judgment in the printed matter discriminating device according to claim 1, wherein the first type of printed matter is an old banknote, and the second type of printed matter is a newly issued banknote. Level setting method.