JPS6182290A - Method and apparatus for identification of 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 method and apparatus for identifying the authenticity and denomination of banknotes.

More specifically, the type of banknote is determined by scanning to detect the magnetism contained in a predetermined printed part of a banknote printed with magnetic ink, and by pulsing the detection signal and comparing it with a pre-stored reference signal. The present invention relates to a banknote identification method and device.

[Conventional technology]

Conventionally, means for identifying banknotes include, for example, means for checking the design pattern of banknotes using a photoelectric sensor;
Alternatively, a method is known in which the presence or absence of magnetism in a specific printed portion is checked using a magnetic sensor. However, in the case of these conventional means, it is difficult to identify complicated design patterns in the former case, and it is not possible to distinguish counterfeit banknotes, which simply have magnetic material attached, from genuine banknotes in the latter case.

Therefore, something like the one shown below was first proposed.
That is, the banknotes are identified by scanning to detect the magnetism contained in a predetermined printed area of the banknotes printed with magnetic ink, and by counting the number of pulses of a signal obtained by converting the detection signal into pulses. It is (
(See Japanese Patent Application No. 58-100055).

In the case of the above-mentioned first-to-file means, it is not just the presence or absence of magnetism;
By checking the number of pulses corresponding to the magnetic information G, banknotes can now be identified with higher accuracy. Even if they are the same, if the pulse appearance positions on the time axis are different, that is, if the printing patterns are different, it is impossible to distinguish between them, and there is room for improvement.

[Problem that the invention seeks to solve]

In view of the above-mentioned circumstances, an object of the present invention is to enable banknotes having different printing patterns to be identified with high accuracy.

[Means for solving problems]

The characteristic structure of the banknote identification method according to the first invention is that magnetism contained in a predetermined printed part of a banknote printed with magnetic ink is detected by scanning, and a signal obtained by pulsing the detection signal; The purpose of the present invention is to determine the type of banknote by comparing the basic small signal obtained by A and a small signal at the same scanning position of both signals.

Further, the characteristic configuration of the banknote identification device according to the second invention is as follows:
A signal obtained by pulsing a detection signal from a magnetic head that detects the magnetism of a predetermined printed portion of a banknote by a pulsating means and a reference pulse signal for each denomination stored in advance in the 4IQ means are scanned at the same scanning position of both signals. The reason for this is that a means of comparison has been provided to perform the comparison.

The effects of the above feature configuration are as follows.

[For production]

In other words, by comparing not only the number of pulses of the pulsed signal but also the appearance position of the pulsed signal on the time axis, the type of banknote can be determined by comparing the entire print pattern printed with magnetic ink. be.

〔Effect of the invention〕

As a result, it has become possible to identify the authenticity of banknotes more accurately than before. Furthermore, banknotes with the same number of pulsed signals but different printing patterns, which could not be distinguished in the past, can now be distinguished from each other.

〔Example〕

EMBODIMENT OF THE INVENTION Below, based on drawing, the Example of the banknote identification apparatus to which the method of this invention is applied is described.

FIG. 2 shows a banknote (S) identification device.

(1) is a main body of the device, and a top lid (3) that fits into a groove-shaped banknote feed path (2) formed on the top surface of the device main body (1) and having a width approximately equal to the width of a banknote (S). , axis (P
) It is attached so that it can be opened and closed by swinging around it. Three bill feeding rollers (4) whose outer peripheral surfaces slightly protrude from the bottom of the bill feeding path (2) are attached to the device body (1), and these three rollers (4) It is interlocked and driven by a motor (5) so that it can freely rotate in forward and reverse directions. The upper lid (3) has a bill feeding roller (4) of the device main body (1).
Three reversing rollers (6) are installed at positions facing the banknotes (S), which are used to feed banknotes (S) over the banknote feeding rollers (4) with the top lid (3) closed.
is configured to be pressed against the feed roller (4) side.

In addition, the upper lid (3) approximately in the center of the banknote feeding path (2)
Then, the banknote (S
) is attached with a magnetic head (7) that detects magnetic information printed with magnetic ink.
A presser roller (9) is installed inside the main body (1) of the apparatus at a position opposite to (7). Furthermore, within the device main body (1), there are three photoelectric sensors (8) each consisting of a port and an ink bar, which detect the presence or absence of banknotes (S) in the path (2).
is provided.

Next, the operation of this identification device will be explained using FIGS. 1 to 3.

When the upper M (3) is closed, the upper lid (3) and the bill feeding path (2
) A banknote (S) printed with magnetic ink is inserted into the banknote insertion hole (10) formed between the banknote insertion hole (10), and the first sensor (8a) installed near the banknote insertion hole (10) When this is detected, the motor (5) is rotated in the normal direction, and the three banknote feeding rollers (4) are driven in the normal rotation. A second sensor (8b) provided approximately in the center of the path (2) detects the banknote (S
) is detected, the 45i air head (7) will
Magnetism contained in a predetermined range of the banknote (S) shown in FIG. 3(A) is detected by scanning, and a magnetic signal amplifier (
11), and a low frequency wave generator (12) that removes high frequency noise.
) to obtain an analog signal that increases or decreases depending on the density of the magnetic ink, as shown in FIG. 3 (I+). Incidentally, the dashed dotted line in FIG. 3(a) is the trace locus of the magnetic head (7).

This signal and the output signal shown in FIG. 3(c) of the rotary encoder (13) interlocked with the bill feeding roller (4) are input to the AD converter (14). A ■
] In the converter (14), in order to quantify the scanning position, the analog signal is converted into a digital signal using the output signal of the rotor 1 encoder (13) as a trigger signal, and the converted newsletter is sent for a predetermined period ( 1+ to t2),
' Note 1. Store in the a means (15).

After all the signals have been stored, this signal is read out, and the maximum level (S,... 8X) and the minimum level (S, I, l,
) is converted into a binary signal (not shown in Fig. 3 (d)), using the average value (S8v, ri) as the dark value (threshold level). Then, this binary signal and By comparing the standard binarized signal for each denomination written in 1.a in advance in another note 4a means (17) by the comparison means (1B) at the same scanning position of both signals, the route is determined. (
2) It is configured to identify the authenticity and denomination of banknotes (S) passing through it.

As shown in FIG. 3 (*), if the binary signals do not match, the detected banknote (S) is determined to be a counterfeit banknote, and the motor (5) is reversed to move the banknote feeding roller ( 4) is reversed and the banknote (S) is returned to the banknote insertion hole (10). Further, as shown in FIG. 3(F), if the binary signals match each other, it is determined that the detected banknote (S) is a genuine banknote, and the banknote (S) is detected by the third sensor (8C).
S) iJ! ! Due to over-detection, the display device (19) provided on the top lid (3) displays each denomination as well as the cumulative amount, and the banknote (S) is sent out from the banknote discharge hole (20). .

To carry out the present invention, instead of storing the digitally converted signal in the temporary storage means (15), the digitally converted signal is sequentially binarized and compared with the denomination-based I4L binarized signal. You can also do this. Furthermore, in order to stabilize the detected magnetic signal, instead of the binarization in the previous embodiment, the magnetism of a predetermined printed portion may be ferromagnetized in advance using a natural magnet or the like.

Furthermore, to digitize the detected analog magnetic signal, a window comparator or the like may be used instead of the AD converter (14), and these are referred to as pulsing means (14).

[Brief explanation of the drawing]

The drawings show an embodiment of the banknote identification device according to the present invention, FIG. 1 is a block diagram showing the banknote identification process, FIG. 2 is a sectional view of the banknote identification device, and FIGS. is an explanatory diagram of signal processing. C (7)...Magnetic head, (1
4)...Pulsing means, (17)...
Storage means, (18)...Comparison means, (S)...
····bill.

Claims (3)

[Claims] (1) The type of banknote is determined by scanning to detect the magnetism contained in a predetermined printed part of a banknote printed with magnetic ink, and by pulsing the detection signal and comparing it with a pre-stored reference signal. A banknote identification method, wherein the pulsed signal and the reference signal are compared by comparing both signals at the same scanning position. (2) The banknote identification method according to claim 1, wherein the reference signal is for determining the authenticity and denomination of the banknote. (3) A magnetic head that detects the magnetism contained in a predetermined printed portion of a banknote printed with magnetic ink by scanning, and a means for pulsing the signal detected by this magnetic head, and the pulsed signal is , a banknote identification device configured to determine the authenticity and denomination of a banknote by comparing it with a denomination-specific reference signal stored in advance in a storage means, wherein the pulsed signal and the reference signal are A banknote identification device comprising comparison means for comparing both signals at the same scanning position.