JPS6188386A - 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 printed matter discriminating device that determines the authenticity of a banknote by detecting the presence or absence of magnetism in a specific printed portion of the banknote, for example.

[Technical Background of the Invention] For example, some banknotes have a printed pattern printed with magnetic ink, and methods for detecting the presence or absence of magnetism to determine the authenticity of banknotes are unique to each banknote handling bank. Used for vessels. FIG. 3 shows a conventional printing 1'0 discrimination device used for such purpose. That is, a magnetic head 1 like a magnetic head is provided on the conveyance surface of the banknote P (to be conveyed), and as it runs over the banknote P, it detects the magnetism contained in the printed pattern and converts it into an electrical signal. , the electrical signal is amplified by an amplifier 2 and supplied to an integrating tube 3. Further, a detector (for example, a photocell) 4 for optically detecting the presence of banknotes P is provided near the magnetic sensor 1, and its output signal is supplied to the position detection circuit 5. In the position detection circuit 5, the bill edge (
Detect the tip of the banknote P) and operate a counter based on IIF based on the banknote); 1) Create a goo 1- signal (position blasphemy wing) that adds tJ l + Q + to the fixed printing part of the paper/MP and goes to integrator 3 (b; 8).

The integrator 53 integrates the output signal of the amplifier 2 only while the gate signal is supplied 11C, and the first integral is sent to the comparator 6.
supply to In the comparator 6, the output of the integrator 3 is i, t; ,
1 out of 4 ratios, comparison of i 1', 'i' R to interrogation unit 71\child 1a 4 discrimination unit 7C, ratio +'I::+I
C) ratio of 1:1 according to the Song Dynasty
jIt's made with something else.

Problem 1 with Ef Tetsu Technique 1 However, the above-mentioned conventional discriminating device has the following problems4.
) - As an example, a US dollar bill is shown, and the magnetic ink is marked with J.
There is a margin 9 around the mark (1; re-pattern 8) printed with the pattern 8.For example, the part of the human image 10 in the printed pattern 8 is set as the specific mark rfl11 part, and the magnetic Now, assuming that this banknote P is conveyed in the direction of the arrow a shown in the figure (0, 0 hand direction), the magnetic sensor 1 moves the top of the banknote P in the direction of the arrow E)7'r shown in the figure. It will be scanned.

By the way, in the conventional discriminating device, as described above, the banknote end 11 is optically detected, and a gate signal corresponding to the specific mark 10 is created using the banknote end 11 as a reference. However, especially in the above-mentioned US dollar banknotes, there is a very large variation in the printing position (position of the print pattern 8) depending on the banknote, and the distance (margin) between the paper edge 11 and the print edge (edge of the print pattern 8) 12 is very large. The width of part 9) is about 2.
It varies from 5mm to 4.0M. Therefore, if a gate signal is created based on the banknote edge 11, the specific printed portion 1
The goo 1 ~ signal that corresponds exactly to 0 will no longer be jqed,
There was a problem in that the discrimination accuracy deteriorated significantly.

[Objective of the Invention 1 The present invention has been made in view of the above-mentioned circumstances, and its purpose is to prevent the deterioration of the discrimination accuracy due to the misalignment of the printing position of the mark-11 pattern, and to improve the discrimination accuracy. The purpose is to overturn the printed matter identification device.

[First Summary of the Invention] In order to achieve the above object, the present invention detects printing of a printing pattern using an output signal of a magnetic sensor, and generates a gate signal corresponding to a specific printed portion using this printing edge as a reference. It is designed to create .

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, P is a banknote as shown in FIG. 4, and is conveyed in the transverse direction in the direction of arrow a in the figure. 21 is [1
By scanning the approximately central part (part of the specific printed part 10) on the aeration tip (the banknote 1) like an air head as it is conveyed, a mark 11 is placed on the banknote P; The repattern's air flow or its change is converted into electricity 1i''i. The output of this magnetic sensor 21 (3 (see Figure 2 a) is amplified to an appropriate level by an amplifier 22, and then integrated. Further, 24 is a detector (for example, 741-2) that optically detects the presence or absence of the banknote P, and its output signal (see b9 in FIG. 2) is supplied to the amplifier 22.
The output signal is supplied to the print edge detection circuit 25 together with the output signal.

The mark I11 end detection circuit 25 includes an amplifier 22 and a detector 2.
The printed end 12 of the banknote P is detected by each output signal of 4.

That is, as shown in FIG. 2(C), after the output signal of the detector 24 rises, it rises when the output signal of the amplifier 22 first rises, and simultaneously with the fall of the output signal of the detector 24. This creates a falling print end signal. The output signal of this print edge detection circuit 25 is supplied to a position detection circuit 26. The position detection circuit 26 is shown in FIG. 2(d).
As shown in FIG.
A gate signal (position signal) that is turned on for only 84 hours corresponding to the position of 0 is created and supplied to the integrator 23.

That is, for example, when the output signal of the print edge detection circuit 25 rises, a counter (not shown) or a clock pulse starts a counting operation, and a predetermined count number determined in advance by the position of the specific printed portion 10 of the banknote P and the conveyance speed is reached. Then, a gate signal is output and supplied to the integrator 23. At the same time, the counter is cleared and immediately starts counting again, and the position detection circuit 2G is 1 for 1 banknote! i
This is to create a χJ L6 L/TaG1 signal in the regular printing system 10. Therefore, the integrator 2.3 is
~Shin Tsubasa or On no Tosanomi GV ′i)! Written by IJJ (1
However, the output signal of the amplifier 22 is
, (The output of the amplifier 23 is the output signal 5''' of the amplifier 22.
, of [< 1! An integral value corresponding to the amount of electricity of only IT is output, and this output signal is supplied to the comparator 27. The comparator 27 compares the output signal of the integrator 23 with the M value, which is a predetermined value, and supplies the comparison result to the discriminator 28. The 7-discriminating unit 28 determines whether the banknote P is Q-false or the like based on the comparison result of the comparator 27, and outputs the determination result.

If this is the case, the printed edge 12 of the printed pattern 8 is detected by the output signal of the magnetic sensor 21, and a gate signal corresponding to the specific printed portion 10 is created using this printed edge 12 as a reference. Mark (11) [The variation in the printing position of the pattern 8 is large, and the gate signal 8 that accurately corresponds to λ·j with the specific printed portion 10 can be obtained. Therefore, it is possible to prevent the deterioration of the discrimination accuracy due to the printing position shift. , it is possible to improve the discrimination fi'+sound.

In addition, in the above embodiment, the banknote is χ, in the 0-hand direction! '＋'
2 We have explained the case where i people are used, but in the longitudinal direction:
”:J) 1.) Applicable when A is done.

Further, in the above embodiment, the case where the authenticity of banknotes is determined is explained, but the present invention is not limited to this, and can be applied to the case where the type is determined. Furthermore, although the case where the printed matter is a banknote has been described, it may also be a check, for example. This method can be applied to any method that determines the authenticity or type of printed matter based on a printed pattern printed with magnetic ink.

[Effect of the invention] As detailed above, according to the present invention, EI] rt++
A printing-only discrimination device that can prevent deterioration in discrimination accuracy caused by misalignment of pattern printing and improve discrimination accuracy! ! i! A monkey with a child.

[Brief Description of the Drawings] Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 is a main part i3 waveform diagram for explaining the operation of the embodiment, and Fig. 3 is a conventional discrimination FIG. 4 is a block diagram showing the apparatus, and is a drawing showing an example of a banknote. P... Banknote (printed matter), 8... Printing pattern, 10
...1h constant printing part, 12...printing edge, 21...
Magnetic sensor, 23... Integrator, 24... Detector, 2
5...Print edge detection circuit, 26...Position detection circuit, 2
7...Comparator, 28...Discrimination unit. Agent Patent attorney [Norichika 1 et al. (L'l /) 11 Otsu) 2nd
Figure η /1 output ρ Figure 3 @ Figure 4

Claims (2)

[Claims] (1) In a printed matter discrimination device that determines the authenticity of a printed matter by detecting the presence or absence of magnetism in a specific printed part of the printed matter, a magnetic sensor scans the printed matter being conveyed and changes in the output of this magnetic sensor. a printing edge detection means for detecting a printing edge of a printing pattern; a gate signal generation means for generating a gate signal corresponding to the specific printing portion based on the printing edge detected by the printing edge detection means; A printed matter discriminating device comprising: a discriminating means for discriminating the authenticity of the printed matter based on the output signal of the magnetic sensor output during the gate signal produced by the producing means. (2) The printed matter discriminating device according to claim 1, wherein the printed matter is a banknote having a print pattern printed with magnetic ink.