JPS59169584A - Discriminator for printing - 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 printed matter discriminating device that determines whether a banknote is genuine or not, whether it is good or bad, or whether it is one overlap, by detecting the thickness of the banknote, for example.

[Technical background of the invention and its problems]

For example, common methods for determining whether a banknote is worn or overlapped are based on the presence or absence of specular reflection by reflected light when pasting tape, and the amount of transmitted light when pasting tape. The latter is easily affected by the printed pattern and has the drawback of not being accurate.

On the other hand, as another general means, there is a discrimination device as shown in FIG. 1, for example. In the figure, l is a fixed roller provided on the conveyance path of banknotes P, 2 is a movable roller that rolls into contact with this fixed roller l and moves up and down with shaft 3 as a fulcrum, and 4 is a movable roller that moves up and down in synchronization with this movable roller 2. Moving metal lever, 5
is a metal sensor whose output changes as the metal lever 4 approaches. When the banknote P is conveyed and passes between the fixed roller l and the movable roller 2, if the banknote P has a normal thickness, the thickness signal obtained by amplifying the output signal of the sensor 5 with the amplifier 6 is as shown in FIG. It becomes va as shown in . on the other hand,
As shown in FIG. 2, if there is an abnormal thickness of the tape T stuck on the banknote P, the thickness signal becomes vb at that part. Therefore, a binarization level Vth is provided, and the abnormal thickness signal vbf is converted into a binarized signal by the binarization circuit 7, and the time, that is, the length tb of the binarized signal is a constant value t1. t
2, if ``t1≦Ah, J'', then the banknotes are overlapping or different types, and if ``t1≦tb≦t2'', it is determined that the banknotes are chipped.

By the way, in recent years, techniques for counterfeiting (or altering) banknotes include pasting together high- and low-denomination banknotes to create new high-denomination banknotes, or cutting out parts of multiple banknotes of the same denomination and modifying them with other paper. , a new bill is made by pasting together parts of the bills that have been cut off.

The banknotes forged in this way are shown in Figure 3(d) (
e) As shown in (f), tape is often applied vertically, horizontally, or diagonally. On the other hand, banknotes torn or torn due to an accident are
) As shown in (c), it is often partially corrected with tape or the like. Therefore, Fig. 3 (a) (b
) If the chee 76 or the like is pasted as shown in (c), it is necessary to identify it as a damaged banknote, and if there is tape, etc. pasted as shown in Figure 3 (d), (e), or (f), it is necessary to identify it as a counterfeit banknote. There is.

However, the conventional discrimination device shown in FIG. 1 cannot distinguish between damaged banknotes and counterfeit banknotes as shown in FIG. 3. This is because the thickness signals of damaged banknotes and counterfeit banknotes are the same, as shown in FIG. 3, which shows the thickness signals obtained from each banknote. In addition, in the above-mentioned thickness signal, ST is a tape thickness signal part, and Sp is a banknote thickness signal part. Furthermore, if the thickness of the tape attached is close to the thickness of the banknote, it will be difficult to distinguish it from a 14-ply banknote. That is, in the example shown in Figure 3, (,)
Regarding (d) (-, damaged banknotes and counterfeit banknotes, (b) and (
, ) or (c) and (f) have the drawback that it is impossible to distinguish between damaged banknotes, counterfeit banknotes, and overlapping banknotes, resulting in a lack of reliability.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a highly reliable printed matter discriminating device that can discriminate with high precision whether the printed matter is genuine or false, whether it is good or bad, or whether it is double p or not. It is about providing.

[Summary of the invention]

The printed matter discrimination device according to the present invention uses one or more thickness sensors arranged in a direction perpendicular to the conveyance direction of the printed matter to be discriminated to extract thickness signals at a plurality of locations on the printed matter to be discriminated, and selects an abnormal thickness signal from among these thickness signals. This abnormal thickness signal is used to measure the continuous length and cumulative length of the abnormal thickness in the conveyance direction, and based on these measurement results, the authenticity of the printed matter to be determined, as well as the double overlap of good and bad, etc. are determined. This is what I did.

[Embodiments of the invention]

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

In FIG. 4, a banknote P is held and conveyed by a conveyor belt 11 in the direction of the arrow shown in the figure. Then, the conveyor belt 1
A fixed roller 12 is disposed in the middle of the roller 1 in a direction perpendicular to the conveyance direction thereof, and five thickness sensors 131 to 135 are arranged on the fixed roller 12 facing each other at predetermined intervals. There is. The thickness sensors 131 to 135 are configured as shown in FIG. 5, for example. That is,
A movable roller 142 that rolls onto the fixed roller 12 and a magnetic body 143 are integrally attached to one end of the lever 141, and the other end of the lever 141 is fixed. and,
A magnetoresistive element 144 is provided at a portion facing the magnetic body 143 with a predetermined gap G therebetween. The resistance value of this magnetoresistive element 144 changes as the gap fG changes.

As the banknote P passes between the fixed roller 12 and the movable roller 143, a change in the thickness of the banknote P is transmitted to the lever 141 via the movable roller 143, thereby changing the gap G. Therefore, the change in the thickness of the banknote P is proportional to the change in the resistance value of the magnetoresistive element 144.

This change in resistance value is converted into an electrical signal by an amplifier circuit, which will be described later, and becomes a thickness signal.

Returning to FIG. 4, in front of the fixed roller 12, a bill P tip detector 15 consisting of a light source and a light receiving element is provided, and the tip detection signal ST obtained from this detector 15 is a control signal. The signal is supplied to the generating circuit 16. This control signal generation circuit 16 uses the tip detection signal ST and the clock pulses and pulses from the oscillator 17 to generate a 1-NOR signal CR1, a detected dirt signal GA, and a NOAR signal C, as shown in FIG.
K respectively. Clear signal CR above
occurs at the tip of the banknote P and clears all circuits. Further, the detected gootoy word GA is generated inside the leading edge and trailing edge of the banknote P. Furthermore, the above e) response signal C
K is the period proportional to the length, for example 1 nogle 1m+n
It is created to correspond to.

Therefore, each output of the thickness sensors 131 to 13S is supplied to the amplifier circuit 18, where each of the banknotes P
It is converted into a thickness signal 81''-3s proportional to the thickness of .

Figure 6 shows detection points H by each age sensor 7Jl to 135.
Dt to HDs and one of their thickness signals, Sl, are shown. In this thickness signal S1, level V is the thickness of banknote P,
Level v2 is the thickness when there is an adhering substance such as tape T, and level v3 is the thickness when there is a thinner part due to peeling of printing or the like.

The thickness level v2 is determined by the analog comparison circuit 191 to be an excessively thick detection level vh which is greater than the thickness level vl of the banknote P.
By comparing it with , it is detected as an excessively thick signal Sh1. Further, the thickness level v3 is compared with the too-thin detection level vn, which is smaller than the thickness level vl of the banknote P, in the analog comparison circuit 192, so that the too-thin signal S
Detected as n1. Similarly, too thick signals Sh2 to Sh5 and too thin signals sn2 to Sn5 are detected from the other thickness signals S2 to S5 by comparison circuits 191 and 92.

The over-thickness signals Sh1 to Sh5 thus detected are each supplied to the over-thick continuous length measuring circuit 20, where the continuous over-thick length of the banknote P in the transport direction is measured. This measuring circuit 20 measures the continuous length of excessive thickness using the clear signal CR% dirt signal GA and pulse signal CK output from the control signal generating circuit 16. For example, as shown in FIG. It is composed of a second measurement circuit 201°2θ2. The first measuring circuit 2o1 detects the overlapping signal OLh and the counterfeit signal SUS bl from the overly thick signals Sh1 to shs, and as shown in FIG.
1. A counter circuit to which the output of the AND circuit 31 is supplied; 32. ．． 322, is configured by counter circuits 323 to 327 to which the too thick signal Sht Sh5 is respectively supplied, and an OR circuit 33 which takes the OR of each output of the counter circuits 322 to 327, and the counter circuit 3
The overlapping 9 signal OLh is obtained from the output of 2□, and the counterfeit signal 5USh1 is obtained from the output of the OR circuit 33, respectively. Note that the counter circuit 321 has setting data Lo.
Setting data Ls is supplied to the L% counter circuit 322, and setting data Ls2 is supplied to the counter circuits 323 to 327, respectively. These setting data LOL r Lsl
r LS2 is the decision length value. The above counter circuit 32
1 to 327 are an AND circuit 34 which ANDs the pulse signal CK and the gate signal GA, a down counter 35 to which the output CK' of the AND circuit 34 is supplied to the clock terminal, as shown in FIG. It is constituted by a launch circuit 36 to which a borrow signal BO from a counter 35 is supplied to a black terminal. Note that the load terminal of the counter 35 is supplied with a signal SIG corresponding to the too thick signal, and the data terminal is supplied with setting data (LOL p Lsl r L
S2, LA) are supplied. This counter circuit operates as follows, and its timing chart is shown in FIG. In other words, the clear signal CR is
5 and the latch circuit 36, and the AND circuit 34 (
The clock pulse CK' to the counter 35 is created by the l''ii key signal GA and the pulse signal CK.The counter 35 continues to load the setting data while the signal SIG corresponding to the too thick signal is at the aO# level. , when it reaches the ``1'' level, the setting data is counted down and the count contents are r
When OJ is reached, a borrow signal BO is generated. If the signal SIG becomes "O" level during counting, the counter 35 loads the setting data again, and then the signal SIG becomes "O" level.
When it reaches the 1'' level, the down count is performed again.The output (Q) of the latch circuit 36 is set to the ``1#'' level by the borrow signal BO. In other words, by setting the value of the excessively thick continuous length that you want to detect in the setting data, this counter circuit can detect only when a continuous thickness exceeding the set length exists in the gate signal GA.
It has the function of setting the final output to the "1" level.

Therefore, in the first measurement circuit 201, the lengths when the over-thickness signals Sh1 to Sh5 simultaneously reach the 1" level are determined by the above-mentioned counter circuits 321 to 327 having function functions, the AND circuit 31, and the OR circuit 33. LOL
If the overlap signal OLh is "1" level, the setting data Ls1 or more or the too thick signal Sh1~Sh
If the length when any one of 5 reaches the °'1" level is greater than or equal to the setting data L82, the counterfeit signal 5USh1 is detected.
1” level.

On the other hand, the second measurement circuit 202 in FIG.
+~Sh5 to damage signal ABI4. ．． counter circuits 371 to 375 to which excessively thick signals sh1 to shs are supplied, respectively, and these counter circuits 371 to
375, and a damage signal ABLh is generated from the output of the OR circuit 38.
1. Note that the counter circuit 3
Setting data LA is supplied to 71 to 375, respectively. Further, the counter circuits 371 to 375 are configured as shown in FIG. 9 similarly to the counter circuits 321 to 327. Therefore, too thick signals Sh1 to Sh5
If the length when one of them reaches the "1" level is greater than or equal to the setting data LA, the output of the OR circuit 38, that is, the damage signal ABI4,1 becomes the "1" level.

Here, the above setting data LOL r Lslr LS2
rLA is CLA≦Ls1<LOL≦LS2 :)
There is a relationship between

Therefore, as shown in FIG. 13(a), two or more overlapping banknotes P are treated as overlapping sheets, and when read consecutively in the direction orthogonal to the conveyance direction as shown in FIG. A banknote P that has been pasted, or a banknote P that has Qi fT, etc. affixed continuously in parallel to the conveyance direction as shown in the same figure (C), may be a combination of different types of banknotes, so it is considered a forgery. Then, the same figure (d
) A banknote P with tape T etc. partially pasted on it is
Repairs such as cuts or tears are detected as damage.

Note that the first measuring circuit 201 in FIG. 7 may be modified as shown in FIG. 11. That is, the too thick signal Shi~S
Signal Sh1.h5 at both ends. Signal Sh2~ excluding Sh5
Only Sh4 is supplied to the AND circuit 31. By doing this, the condition for detecting heavy fx is changed to the center signal Sh2 to S of the too thick signals Sh1 to shs.
The length at which h4 becomes “1” level at the same time is the setting data LO.
When the signal is equal to or higher than L, the overlapping signal OLh can be set to the ``1'' level.
Even if two banknotes P with a tear K on the edge overlap each other, it can be detected as an overlapped banknote without any problem.

Further, the first measuring circuit 201 shown in FIG. 7 may be modified as shown in FIG. 12. That is, the counter circuit 321 is replaced with five counter circuits 3211 to 3215, and the five counter circuits 3211 to 3215 are supplied with too-thick signals Sbl to Sh5, respectively, and the respective outputs of the counter circuits 3211 to 321s are connected to an OR circuit 39. supply to,
An overlapping signal OLh is obtained from the output of the OR circuit 39. By doing this, the condition for overlapping 9 detection is set when any of the too thick signals Sh1 to Sh5 is I1.
The length of the 1# level is the setting data Lot.

Overlapping signal OI4. can be set to "1" level. As a result, for example, as shown in FIG. 13(f)
Even if the banknotes P with holes H overlap as shown in FIG. 2, the overlap can be detected without any problem.

Returning to FIG. 4 again, the overthickness signals Sh1 to Sh5 are each supplied to the overthickness cumulative length measuring circuit 21, where the overthickness cumulative length of the banknote P in the transport direction is measured. This measuring circuit 21 receives a clear signal CR output from the control signal generating circuit 16.

The cumulative overthickness length is measured using the dirt signal GA and the pulse signal CK. For example, as shown in FIG. It is constituted by a counter circuit 42 to which the output of this OR circuit 41 is supplied, and the damage signal ABLh2 is obtained from the output of this counter circuit 42.
LA is supplied. Further, the counter circuit 42, as shown in FIG.
and an AND circuit 43 which takes the AND of the signal SIG corresponding to the too thick signal, and an up counter 44 to which the output CK' of the AND circuit 43 is supplied to the clock terminal.The contents of the counter 44 are supplied together with the setting data (ΣLA). The comparator 45 is configured by a comparator 45. This counter circuit operates as follows, and its timing chart is shown in FIG. That is, the clear signal OR clears the counter 44, and the AND circuit 43 outputs A? Ruth signal CK, dirt signal GA.

A clock pulse CK' to the counter 44 is generated by the signal SIG. The counter 44 counts the pulses CK' while the signal SIG is at the 1" level and any one of the too-thickness signals Sh1 to Sh5 is at the 1" level. is supplied to the rotor 45. The comparator 45 compares the contents of the counter 44 with the setting data, and sets the output to the "1" level if the contents of the counter 44 become equal to or larger than the setting data.

In this way, the excessively thick cumulative length measuring circuit 21 detects that any of the excessively thick signals Sh1 to Sh5 is "1" in the dirt signal GA.
'' level, the length is cumulatively measured, and only when the set length or more cumulative thickness exists, the damage signal A, BLh2 is set to the l1zjl level. Therefore, as described above, It is too thick and cannot be detected by the continuous length measuring circuit 2° (the tab damage signal ABLh1 is 1")
Banknotes with fine wrinkles or numerous small deposits (such as those that do not reach the same level) can be detected as damaged.

Further, the overthickness signals Sh1 to shs are respectively supplied to the diagonal continuous thickness gap detection circuit 22. This detection circuit 2
2 is an excessively thick signal Sh1 to Sh5, and if taping is detected continuously in each direction from Sh1 to Sh5 or Sh5 to Shi, it is possible that different types of banknotes were cut diagonally and pasted together. In this case, the counterfeit signal 5USh2 is set to "1" level as a counterfeit bill, and for example, as shown in FIG.
Consisted of. The first detection circuit 22° is a circuit for detecting the tape T attached as shown in FIG. 18(a), and the second detection circuit 222 is
For example, the tape T attached as shown in Figure 18(b)
2, the basic configuration is the same, but the input order of the too thick signals Sh1 to Sh5 is different. In FIG. 17, 511 to 514 are differentiating circuits that generate a signal pl-P4 when the too-thick signals Sh1 to Sh4 fall from "1" to "0" level, respectively;
521-524 and 531-534 are AND circuits, 5
4 is an inverter circuit, 55.degree. 56 is an OR circuit, 57 is a NOR circuit, and 581 to 585 are latch circuits.

The operation shown in FIG. 17 will be described below with reference to the timing chart shown in FIG. 19. First, latch circuits 581 to 585 are cleared by clear signal CR. Now, the first
8 As shown in Figure (a), tape T1pT! is pasted, the thickness signal Sh1 changes from “0” to “” at tape T1.
After 11 levels, the output (Qt) of the circuit 581 is set to "1" level via the inverter circuit 54. Next, after passing through the tape TI, the too thick signal Sh1 becomes "1".
"→"0" level 9, pulse P from differentiating circuit 511
, occurs. At this time, since the too thick signal Sh2 is at the 0" level, the output of the AND circuit 521 goes to the "0" level9, so the latch circuit 582 is not set and its output (Ql) remains at the "0" level. be.

Also, the AND circuit 53. The output is also “0# level,”
Therefore, the latch circuit 58! via the NOR circuit 57 and the OR circuit 55! is cleared. Next, at the tape T2, when the too-thick signal Sh1 changes from "0# to "1" level, the output (Ql) of the latch circuit 58 is set to the "1#" level. Signal Sh changes from '1'' to '0'
If the too-thick signal Sh2 is at the "1" level when reaching the "1" level, the output of the AND circuit 521 also becomes ""1#1.
# Since the level is high, the output of the latch circuit 582 (Ql
) is set to l level. At this time, the differentiator circuit 5
11 generates a pulse pi, but the AND circuit 531 does not pass the pulse P because the output of the AND circuit 521 is at the "1" level.
The TE circuit 581 is never cleared like in the case of rl. Next, when the too thick signal Sh2 goes from 'l'' to '0# level, and the too thick signal Sh3 goes to '1# level, the output of AND circuit Wr522 also goes to '1 level,' so The output (Qs) of the latch circuit 583 is "
In this way, when the too thick signal Sh3 changes from 1" to "0" level, the too thick signal S
h4 is at “1” level, too thick signal Sh4 is “1”→”
If the too thick signal Sh5 is at the 1# level when it reaches the 0# level, the output of the latch circuit 585 (Q
s) is sected to the "1" level, indicating that too thick tape, such as continuous diagonal tape application, has been detected. Note that the OR circuit 56 outputs the detection result of the tape pasting as shown in FIG. 18(a) by the first detection circuit 221 mentioned above, and the second
When either is detected by OR with the detection result of tape attachment as shown in FIG. 18(b) by the detection circuit 222, a damage signal 5USh2 of "1" level is output.

Returning to FIG. 4 again, the too-thin signals Sn1 to Sn5 are each supplied to the too-thin continuous length measuring circuit 23. This measuring circuit 23 detects the too-thin signal Snl within the dirt signal GA.
-sn5 reaches the "1" level, its length is measured, and if it is longer than a set value, it is determined to be a different type of banknote and the counterfeit signal 5USn is set to the °l" level. For example, as shown in Fig. 20. As shown in , too thin signals Snl~sn5
It is configured by counter circuits 611 to 615 to which are supplied, respectively, and an OR circuit 62 which takes the OR of the respective outputs of these counter circuits 6-11 to 615, and a counterfeit signal 5USn1 is obtained from the output of this OR circuit 62. There is. Note that setting data LS3 is supplied to the counter circuits 611 to 615, respectively. Further, the counter circuits 611 to 61. is a circuit having a function similar to that of the counter circuit shown in FIG. Therefore, if the length when one of the too thin signals sn1 to Sn5 reaches the '1' level is greater than or equal to the setting data LB5, the output of the OR circuit 62, and the counterfeit signal 5USn1 becomes the '1' level. .

Further, the too-thin signals sn1 to sn5 are respectively supplied to the too-thin cumulative length measuring circuit 24. This measurement circuit 24 is
When any of the too-thin signals sn1 to Sn5 reaches the 1" level in the dirt signal GA, measure the cumulative length, and if it is equal to or greater than the set value, it is a fake signal 5US.
n2 to 11'' level, and as shown in FIG. 21, for example, it is composed of an OR circuit 71 that takes the OR of the too thin signals Sn1 to sn5, and a counter circuit 72 to which the output of this OR circuit 7 is supplied. The forgery signal 5Ush2 is obtained from the output of the counter circuit 72.The counter circuit 72 has setting data Σ
LS is supplied. Further, the counter circuit 72 is a circuit having the same function as the counter circuit shown in FIG. 15. Therefore, in the dirt signal GA, if the cumulative length when any one of the too-thin signals sn1 to Sn5 reaches the 11" level is equal to or greater than the setting data ΣLs, the output of the counter circuit 72 is The counterfeit signal 5USn2 goes to the "'1" level.

Here, the above-mentioned measurement of the continuous length of too thin can detect a different type of banknote that is thin all over without any thermal problem, but for example, as shown in FIG. 13(g), a regular banknote P is If a thin paper M of a different type is pasted with tape T or the like between the cutouts and the tape T, if the tape part comes off the thickness sensor, it cannot be detected by measuring the continuous length because it is too thick.
It has the effect of preventing this. Furthermore, the above-mentioned measurement of the cumulative length of excessively thin banknotes is aimed at detecting counterfeit banknotes that have partially and discontinuously thin parts.

Therefore, the overlapping signal OLh and the counterfeit signal 5USh obtained by each of the circuits 20 to 24 as described above.

5Ush□, 5Usn1, 5USn2, damage signal ABL
h1.

The ABLh2 are respectively supplied to the comprehensive judgment circuit 25.

This comprehensive judgment circuit 25 makes a final judgment based on each of the above-mentioned signals, and is composed of, for example, an OR circuit 81, 82, an inverter circuit 83, 84, and an AND circuit 85, 86 as shown in FIG. . In other words, the OR circuit 8 has forged signals 5USh1, 5USh2, 5US
If either n1 or 5USn2 is at the "1" level, the output is at the 11# level. The OR circuit 82 is
If either one of the damage signals ABLh1 or ABLh2 is at the 11# level, the output becomes the "1" level.Inverter circuits 83, 84 and AND circuits 85.8
6 constitutes a kind of priority circuit. In other words, the heavy sea No. 8 OI4. When it becomes “1”, the other results are inhibited, and the final result is the overlapped banknote signal OL.
Only output is possible at “1” level. 1. +, if any of the counterfeit signals reaches the "1" level, all the damage signals are inhibited, and as a final result, only the counterfeit banknote signal SUS is output at the "l# level."In addition, the damage signals ABI4...
, ABI4, ABI2 is at the "1" level, and only when the other detection signals are at the "0" level, only the damaged banknote signal ABL is output at the "1" level as the final result.

In the above embodiments, the case where the present invention is applied to a bill discriminating device has been described, but the present invention is not limited thereto, and can be applied to a discriminating device for printed matter other than bills, such as checks or securities.

〔Effect of the invention〕

As described in detail above, according to the present invention, abnormal thickness signals are discriminated from the thickness signals of printed matter to be determined obtained from a plurality of thickness sensors, and the continuous length and cumulative length are measured. Discrimination It is possible to provide a printed matter discrimination device that can highly accurately discriminate whether a printed matter is genuine or not, whether it is good or bad, or whether it is double or not, and which can provide high reliability.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a conventional discrimination device, FIG. 2 is a timing chart for explaining the operation of FIG. 1, and FIG.
The figure shows examples of damaged banknotes and counterfeit banknotes. Figures 4 to 22 are for explaining one embodiment of the present invention. Figure 4 is an overall configuration diagram, and Figure 5 is a diagram showing the thickness. The configuration diagram of the sensor, Figure 6 is a diagram showing one detection point by the thickness sensor, their thickness signals and various control signals, Figure 7 is the configuration diagram of the continuous length measurement circuit for excessive thickness, and Figure 8 is Figure 7. 1st in
9 is a configuration diagram of the timer circuit in FIG. 8, FIG. 10 is a timing chart for explaining the operation of FIG. 9, and FIGS. 11 and 12 are diagrams of the timer circuit in FIG. 7. 1 is a configuration diagram showing a modified example of the measurement circuit.
The figure is a configuration diagram of the too-thick cumulative length measuring circuit, and Figure 15 is the 1st
4 is a configuration diagram of the timer circuit, FIG. 16 is a timing chart for explaining the operation of FIG. A diagram showing examples of banknotes affixed to
Fig. 19 is a timing chart for explaining the operation of Fig. 17, Fig. 20 is a block diagram of the too thin continuous length measuring circuit, Fig. 21 is a block diagram of the too thin cumulative length measuring circuit, and Fig. 22 is a block diagram of the too thin continuous length measuring circuit.
The figure is a configuration diagram of a comprehensive judgment circuit. P... Banknote (printed matter to be determined), 11... Conveyor belt,
13. ~13s... Thickness sensor, 16... Control signal generation circuit, '91+192... Analog comparison circuit, 2
0... Too thick continuous length measuring circuit, 21... Too thick cumulative length measuring circuit, 22... Diagonal direction continuous too thick detecting circuit, 23... Too thin continuous length measuring circuit, 24... ...Too thin cumulative length measuring circuit, 25...Comprehensive judgment circuit. Figure 1 Figure 2 Figure 3 (a) (b) (c) Figure 5 Figure 6 Figure C Figure 7 Figure 8 Figure 9 Figure 10 Q-■--111 Figure 11 Figure 12 LOL Sh+ Figure 13 Figure 14 Figure 15 Figure 16 A≧B-11-]-1 Figure 18 Figure 20 S3 Figure 19 Q5'

Claims (4)

[Claims] (1) n (n=1
+2+3t...) n thickness sensors that obtain thickness signals at locations, a discrimination means for discriminating abnormal thickness signals from each thickness signal from these thickness sensors, and an abnormal thickness in the transport direction based on the output of this discrimination means. Measuring means for measuring the continuous length and cumulative length, respectively, and overlapping prints and false prints based on the measurement results of this measuring means. determination means for making each determination of a damaged printed matter; 1 Abnormal thickness continuous length measurement circuit,
a second abnormal thickness continuous length measuring circuit that measures the continuous lengths thi (n=1 to n) of abnormal thickness signals from each of the n thickness sensors when they are discriminated; The abnormal thickness cumulative length measuring circuit measures the cumulative length Σth of the abnormal thickness signals when they are discriminated, and the determining means sets the determination length value to LoLI L81 rLS2 + LA, ΣLA, and LA Assuming that there is a relationship of ≦LSI<LOL≦L82, the measured value obtained from each of the measurement circuits -1h+
Based on thi yΣth, the judgment of single printed matter is th≧
Under the LoL conditions, a fake print is determined when at least one of th≧LSI or thi≧Ls2 holds true, and a damaged print is judged when thl≧LA or Σth
A printed matter discriminating device characterized in that each determination is made based on conditions when at least one of ≧ΣLA is satisfied. (2) When abnormal thickness signals from each of the n thickness sensors are discriminated at the same time, n
The printed matter discrimination device according to claim 1, wherein the abnormal thickness signals from all the three thickness sensors are discriminated at the same time. (3) When abnormal thickness signals from each of the n thickness sensors are discriminated at the same time, n
The claim is when the abnormal thickness signals from each of the remaining 2nd to n-1th sensors excluding the 1st and nth sensors at both ends among the thickness sensors are discriminated at the same time. The printed matter discrimination device according to item 1. (4) The printed matter discrimination device according to claim 1, wherein the abnormal thickness is thicker than the average thickness.