JPS5839389A - Paper sheet 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 The present invention relates to an apparatus for identifying banknotes or securities paper, and in particular, detects irregularities and watermarks provided on banknotes, etc. to determine the denomination or authenticity of paper goods. The present invention relates to a detection identification device.

Conventionally, in order to recognize the authenticity and type of paper sheets such as banknotes, devices have been used to detect the lines printed on the paper sheets using optical sensors, or to measure the dimensions of the paper industry. It was

However, in the case of a device that recognizes the four turns of a paper leaf, if the banknotes have been used for a long time and have been worn out (printed on the back), the nine turns deteriorate, and the detection signal fluctuates greatly. However, there are disadvantages such as the paper sheet becoming shorter than the specified size due to damage to the end of the sheet, or becoming longer than the specified size if the sheet is carried in at an angle when it is transported to the length measuring device position. have

Furthermore, a major drawback of the conventional apparatus is that it requires a large number of detectors to detect printed patterns and the like, resulting in an increase in the size of the identification apparatus.

The present invention was developed in order to eliminate the above-mentioned drawbacks, and its feature is that it detects the irregularities and watermarks formed on paper sheets such as banknotes and securities. The purpose is to obtain an identification device capable of detecting type and authenticity.

Hereinafter, one embodiment of a paper sheet having a concave portion according to the present invention will be described in detail with reference to FIGS. 1 to 4.

Figure 1 shows different types of banknotes used in the present invention. For example, the 10,000 yen bill 1 shown in Figure 1-) has Braille markings on the edge of the banknote so that blind people can recognize the denomination of the banknote. A recess 1α corresponding to 1A1 and a transparent portion 1b are provided approximately in the center of the banknote, and the 5,000 yen bill 2 shown in FIG. 2α, 2b and a transparent portion 2C are provided, and similarly in the 1,000 yen bill 3 shown in FIG.
A transparent portion 3C is provided in the recesses 3α, 3b corresponding to the banknotes 1 and in the center of the banknote.

It is assumed that the securities market is also provided with a concave portion and a transparent portion of the Braille eye according to the denomination.

As mentioned above, after a paper sheet with Braille and watermarks added thereto is inserted or placed in the identification device of the present invention, the paper sheet is moved in the direction of the arrow in FIG.

The discrimination device 4 has recesses 1a, 2g, 2b1 for banknotes, etc.
Detectors 6a and 6h are arranged to detect 3α and 3h, and the detection width for detecting the recesses covers the recess positions on paper sheets 1 to 30 where Braille characters are added and is greater than the lateral shift tolerance. length.

Select the detectors 6α and 6b so that Also provide transparency. The transparent portion 2c is detected by 6α and 6b. This detector 6C
The detection width is greater than the selection. The photodetectors 6α and 6c are for detecting the reflected light irradiated onto the banknotes 1 to 3 from the light source 5, and are used for 6h.

6d is for detecting transmitted light.

The transmitted light from the light source 5 is significantly different in transmittance between the recesses 3α and 3b and the transparent portion 3C than the transmittance on other smooth banknote surfaces, so when the banknote moves in the direction D, it is detected by the detectors 6h and 6d. The detected power extracted is shown in Figure 3 (A) (m (S of 0,
and S, so that K becomes. The same applies to the detection elements taken out from the reflection detectors 6α and 6c.

Such waveforms differ depending on the type of banknotes 1 to 3, and for the 10,000 yen bill 1 shown in Fig.
, 4, the period t of the transparent portion 1b appears with a large amplitude, and the output waveform S from the detector 6b
! One mountain 7 appears within the period t.

Similarly, part K1111 (detector 6 in 5,000 yen bill 2 shown by JIK)
The output on the d side is always constant, and the output on the detector 6b side is as shown in FIG. Appears during t4.

Furthermore, in the 1,000 yen bill 3, the transparent portion 3C appears as an output waveform S on the detector 6d side with a large amplitude for a period t, and the output from the detector 6h side has the concave portions 3a and 3b superimposed, resulting in a peak value of the waveform S. The highest pile 9 is taken out.

These output waveforms S1, S, are set to a threshold value S by a threshold level setting circuit 10.11 as shown in FIG.
The output waveform from the detector 64.f3d is set as shown in Figure 3 (2).
Slice the large amplitude part of.

The output from the next threshold level setting circuit 10.11 is applied to a binarization circuit 12.13 to binarize the sliced output signal.

In this way, the output of the binarization circuit 12.13 will be 21~
FIG. 4 (A to
t is obtained.

Such a binary signal is shown in Figure 4) (1) (C) K
As shown, a binarized signal unique to each banknote is obtained as an output divided into zones Z1 to Zn. This binary reconnaissance B,
, j, are applied to the comparison circuits 14 and 15, respectively.

On the other hand, the binary dictionary of genuine notes of each banknote shown in FIG. The converted data 11 is added to the comparison circuit 14.15 and compared to determine the authenticity and denomination of the paper sheet at the terminal 19.20.The reflected light from the paper sheet is detected by the detector 6α, 6C can be detected in a similar manner. Paper sheets having convex portions can also be detected in the same way.

Since the present invention is constructed as described above, in addition to detecting the unevenness of the banknote, the recognition of the transparent part is also performed at the same time.Furthermore, since these are performed by optically the same detection means, the identification device is extremely easy to use. can be configured. Furthermore, it has a feature that can significantly reduce misclassifications.

[Brief explanation of the drawing]

FIG. 1 (4 to <C> is a plan view of a banknote in which Braille Gin irregularities and transparent parts are formed for each denomination of the banknote used in the present invention, and FIG. 2 is a detection means of the paper sheet discrimination device of the present invention. and a system diagram showing the detection signal processing method, Fig. 3 (A - (φ is an explanatory diagram of the transmission detection output waveform for each banknote in Fig. 2, Fig. 4 (A - (C) is the binarization in Fig. 3 It is an output waveform diagram. 1 to 3--Banknotes, 1a, 'la, 3a, 2b, 3h-
Uneven part, 4...Identification device, 5...Light source, 6α, 5A
, 5C, 6d...Detection, on base, 10, 11...Threshold level setting circuit, 12.13...Binarization circuit, 14.15...Comparison circuit, 16.17... memory circuit.

Claims (1)

[Claims] a detection means for optically detecting irregularities and transparent parts provided on a paper sheet, a binarization means for dividing the detection force into a plurality of zones in a time domain and binarizing it, and a paper sheet. and storage means for storing dictionary data of genuine notes of the same type, and paper sheets are recognized by the output of a comparison means that compares the output from the binarization means with the output of the storage means for storing dictionary data. A paper sheet identification device characterized by: