JPH0480893A - Counterfeit paper money discriminating device - Google Patents

Abstract

PURPOSE:To execute plural checks and to more exactly decide truth by providing more than two infrared sensors and calculating the lengthwise and breadthwise directions of an inserted object according to the presence/absence of a signal while dividing them into plural parts. CONSTITUTION:The infrared sensors are provided and by these infrared sensors, causes such as the ruggedness, included carbon component, pigment component or metal component of ink or the quality of paper, etc., are detected as waveforms so as to operate mechanisms for reception and return while collating the contents of a memory, which stores the waveform of true paper money in advance, with those data. Then, more than two infrared sensors are installed so as to calculate the lengthwise and breadthwise directions of the inserted object according to the presence/absence of the signal while dividing them into plural parts. Therefore, the check is not one scanning but are plural including various things. Thus, the truth is precisely checked and the exactness is more improved.

Description

[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD The present invention relates to an improvement in a counterfeit bill discriminating device.

[Background of the invention]

Conventionally, the bill slots of vending machines, money exchange machines, game machines, etc. have been equipped with BfM, and the bill slots are equipped with various recognition devices to automatically check the authenticity and accept the bills. It was driving the mechanism for either return or return. −
Authenticity determination on a boat involves determining the magnetism in banknotes, but the reality is that it is relatively easy to bypass the check mechanism for this magnetic determination.

Therefore, instead of this magnetism, the applicant focused on the special characteristics of printing on banknotes and memorized the intrinsic data such as the unevenness of the ink, its carbon type, pigment type, metal component, paper quality, etc., and inserted it into the banknote slot. We have developed a check mechanism that compares the data obtained from the tested items.

However, even with this new check mechanism, it has been found that when authentic bills are copied using a copying machine with advanced technology, the waveforms may be similar depending on the density, and there is a risk of misidentification in some cases. .

[Purpose of the invention]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and aims to provide a counterfeit bill discriminating device capable of solving these problems and performing highly accurate checking.

[Means to solve the problem]

In order to achieve this object, the counterfeit bill discrimination device according to the present invention has an infrared sensor that scans the longitudinal direction of the insert with an irradiation surface of a predetermined width, and uses the infrared sensor to detect irregularities in the ink or carbon components contained therein. The infrared sensor is used in a counterfeit bill discriminating device that detects factors such as pigment components, metal components, paper quality, etc. as waveforms, and compares the data with a memory in which the waveforms of genuine bills are stored in advance to activate an acceptance and return mechanism. The present invention is characterized in that the insert is divided into a plurality of parts in the longitudinal direction and the lateral direction, and calculations are made based on the presence or absence of a signal.

[Effect]

With the above configuration, the checker is not only scanning one, but also scanning multiple scans, and it is also wide-ranging, and in particular, points (areas) where it is difficult to see the difference between genuine bills and copies are precisely checked. As a result,
The accuracy will be further improved.

〔Example〕

Next, an example of implementation of the present invention will be described with reference to the drawings.

FIG. 1 shows a genuine bill (10
Figure 2 is a waveform diagram when the magnetic copy density is 7.0, and Figure 3 is a waveform diagram when the density is 7.2.

Figure 4 is a waveform diagram for a density of 7.5, Figure 5 is a waveform diagram for a density of 7.7, and Figure 6 is a waveform diagram for a density of 8.
．． It is a waveform diagram in the case of 0.

The waveforms in these figures are near infrared rays (wavelength 60
It is formed by scanning the unevenness of the ink (reflectance of the light irradiated according to the movement of the insert) on the central part of the insert surface with a width of about 2 mm or more using a sensor ranging from 0 to 104104O. The signal is displayed as a voltage. Moreover, this waveform is generally obtained by dividing the inserted material into eight parts in the direction of the peak and checking the presence or absence of a signal. Looking at these figures, the shapes are generally similar, but there are differences in the voltage values and the width of the peaks. As can be seen from Figure 1, in the genuine bill, the voltage has sharp peaks at several points around 0.6V, and a continuous low voltage value (approximately 0.6V) at approximately the center. IV) continues.

In the case of magnetic copies, the maximum wave height value generally reaches 10.5V, and authenticity can be determined based on this level difference.However, in the low pressure range in the center, the second wave irradiated from below A near-infrared sensor is used to irradiate the area with a width of approximately 1 mm, and repeated checks are performed. In the case of this second near-infrared sensor, the final judgment is made by dividing the insert in the transverse direction, performing calculations in conjunction with the first near-infrared sensor, and comparing the waveform of the genuine bill with the memory stored in it. being done.

Additionally, the position of this second near-infrared sensor is such that it irradiates the insert from below to above, but it does not need to face the first near-infrared sensor, and may be slightly offset. .

The low voltage range in the center is considerably wider than that of genuine bills due to the density of the magnetic copy, and in conjunction with checking the voltage level of the highest peak value mentioned above, authenticity can be determined with great accuracy.

Further, although not specifically described in this embodiment, by using a color identification sensor in combination, it can also be used as a countermeasure against general copying and magnetic copying. General copy, &
iMagnetic copy Since it is black and white and achromatic, it can be checked immediately.Also, even if a color copy is used, since it is a type of general copy, the level does not deteriorate and the near-infrared sensor can check the copy. The judgment is made by

Further, although it is preferable that the first and second near-infrared sensors, which sandwich the insert, operate simultaneously, a control system may be adopted in which the second lower sensor is activated depending on whether the upper sensor is checked.

〔Effect of the invention〕

As mentioned above, according to the counterfeit bill discrimination device according to the present invention,
By deploying at least two or more infrared sensors, it is possible to more accurately determine authenticity without having to perform multiple checks, making it highly reliable.

[Brief explanation of drawings]

FIG. 1 shows a genuine bill (10
00 yen bill) A waveform diagram when the topsoil is 0, Figure 2 is a waveform diagram when the magnetic copy density is 7.0, and Figure 3 is a waveform diagram when the density is 7.2. Figure 4 is the same waveform diagram for the case of concentration 7.5, Figure 5 is the same (waveform diagram for the case of S degree 7.7, Figure 6 is the waveform diagram for the case of concentration 8)
．． It is a waveform diagram in the case of 0.

Claims (1)

[Claims] (1) It has an infrared sensor that scans the longitudinal direction of the insert with an irradiation surface of a predetermined width, and the infrared sensor detects factors such as unevenness of the ink, carbon components, pigment components, metal components, paper quality, etc. as waveforms. In a counterfeit bill discriminating device that operates a mechanism for accepting and returning bills by comparing the data with a memory that stores the waveform of genuine bills in advance, two or more infrared sensors are installed to detect the longitudinal and lateral directions of the inserted bill. A counterfeit bill discriminating device that divides into multiple parts and performs calculations based on the presence or absence of a signal.