EP1955292A1 - Dispositif pour controler l'authenticite de billets de banque - Google Patents

Dispositif pour controler l'authenticite de billets de banque

Info

Publication number
EP1955292A1
EP1955292A1 EP06806723A EP06806723A EP1955292A1 EP 1955292 A1 EP1955292 A1 EP 1955292A1 EP 06806723 A EP06806723 A EP 06806723A EP 06806723 A EP06806723 A EP 06806723A EP 1955292 A1 EP1955292 A1 EP 1955292A1
Authority
EP
European Patent Office
Prior art keywords
banknotes
sensor arrangement
light
control device
wavelength
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP06806723A
Other languages
German (de)
English (en)
Inventor
Thomas Giering
Franz Müller
Wolfgang Rapf
Dieter Stein
Wolfgang Deckenbach
Walter Straub
Klaus Thierauf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1955292A1 publication Critical patent/EP1955292A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties

Definitions

  • the present invention relates to a device for checking the authenticity of banknotes in unprotected areas.
  • banknotes In order to check the authenticity of banknotes, a variety of devices have been proposed. For example, it has become known to detect feature substances present in banknotes by means of a sensor in order to check the authenticity of the respective banknote. As a rule, the banknotes are illuminated with a light of a specific wavelength. The light of the particular wavelength stimulates the feature substances to emit even light of another wavelength, so-called luminescent light. The light reflected from the banknotes is detected by a detector and the banknotes are recognized as genuine if the detector detects the luminescent light.
  • the known devices also provide starting points for counterfeiters without much effort to determine how the verification of the authenticity of the banknotes is performed. For this purpose, for example, it is only necessary to determine the wavelength of the illumination and the wavelength of the light remitted by the banknotes. The wavelengths then allow conclusions to be drawn about the feature substances used in the banknotes.
  • the known devices for verifying the authenticity of banknotes thus have the disadvantage that, when they are used, they lead, to a certain extent, to the unmasking of the feature substances used to secure the authenticity of the banknotes. This is particularly problematic when the devices in unprotected areas, eg. B. on Places are used where they are accessible to a wide group of people.
  • Such devices are, in particular, smaller banknote processing machines for counting, billing and evaluating banknotes, but also checking devices for accepting and / or dispensing banknotes.
  • the invention relates to a device for checking the authenticity of banknotes in unprotected areas, having a sensor arrangement which contains a light source which generates light of a first wavelength, with which the banknotes to be checked are illuminated, whereupon one or more in and / or feature substances present on the banknotes generate light of a second wavelength, which is detected by the sensor arrangement, and a control device, which evaluates data of the sensor arrangement via the light of the second wavelength and compares with reference data to determine the authenticity of the banknotes , wherein construction and operation of the sensor arrangement and / or control device only make it difficult to draw conclusions about the feature substances contained in the banknotes.
  • the invention thus has the particular advantage that it allows the device to check secret feature substances for the determination of the authenticity of banknotes also in areas which are accessible to a broad public or general public, without a Enttar- tion or recognition of the feature substances without more is possible.
  • a very secure verification of the authenticity of banknotes by means of feature substances is also possible for simple and inexpensive apparatus for processing and accepting banknotes, for example for small banknote processing machines for counting and sorting banknotes in the counter area, banknote validators for deposit machines, vending machines etc.
  • the sensor arrangement and the control device at least one further property of the banknotes, z. B. their size, color, etc., record and evaluate.
  • the verification of the feature substance (s) will only be carried out if the presence of a banknote has been concluded when checking the at least one further property.
  • the preferred embodiment has the advantage that thus increased security can be achieved because simple counterfeiting attempts that should lead to the disarming of the feature substances used, are recognized immediately and the verification of the feature substances is omitted by the device. Thus, it is not recognizable how the check of the feature substances is carried out, whereby these are particularly protected against spying.
  • the light source used for the generation of the light of the first wavelength and / or used for the detection of the light of the second wavelength sensors of the sensor arrangement are constructed without specific filters for the first and / or second wavelength.
  • the preferred further embodiment has the advantage that it is not possible to conclude on the feature substances used solely on the basis of an examination of the filter, as a result of which improved protection against spying can be achieved.
  • the device when checking the banknotes, carries out measurements and evaluations which comprise interdependent examination steps.
  • the preferred other Ausensexungsform has the advantage that the concatenation of different investigation steps makes it difficult to recognize the feature substances used, since a considerable effort is required to detect the interdependent examination steps by random trial and error.
  • the sensor arrangement and the control device detect and evaluate feature substances, the light source of the sensor arrangement generating the light of the first wavelength alternately with different amplitude and / or pulse width.
  • the preferred still other embodiment has the advantage that feature substances can be used in the banknotes in such a way that they conceal each other, whereby a random end-coverage is very unlikely.
  • the single FIGURE shows a schematic representation of a basic structure of a device 10 for the verification of banknotes, in particular the verification of the authenticity of the banknotes.
  • the banknote verification device 10 is designed as a banknote processing machine and has an input pocket 20 for the input of banknotes 21 to be processed, in which a singler 22 engages.
  • the verzeier 22 detects each one of the banknotes to be processed 21 and transfers the single bill to a transport system 23, which transports the single bill through a sensor assembly 30.
  • various sensors 31, 32, 33, 34 are present, which can check different properties of the banknotes.
  • a first optical sensor 31 which detects light reflected from a first side of the banknote
  • a second acoustic sensor 33 which detects, in particular transmitted, ultrasound signals originating from the banknote
  • a third optical sensor 32 the light transmitted by the banknote detected
  • a fourth sensor which detects reflected light from a second side of the bill
  • the sensors 31, 32, 33, 34 scan the banknotes with a certain resolution, resulting in a pixel size, with which the banknotes are detected
  • the optical sensors 31, 32, 34 may also contain a light source which generates light of a certain first wavelength in order to excite feature substances contained in the banknotes.
  • the stimulated feature substances in turn generate (emit) light of a specific second wavelength, which can serve as proof of the authenticity of the bank notes.
  • the wavelength of the emitted light of the second wavelength may be smaller, larger or (almost) equal to the first wavelength of the light of the illumination.
  • the intensity course of the light of the second wavelength is measured during the illumination with the light of the first wavelength and / or after the switching off of the illumination. From the measured intensities and / or the Ankling and / or the decay behavior, the authenticity of the banknotes is determined.
  • data can be formed by the sensors 31, 32, 33, 34 and / or a control device 35, which represent each location on the surface of the respective banknote.
  • the generation of the data can z.
  • both surfaces can be detected and corresponding data made available.
  • the pages or surfaces of the banknotes are each completely detected and corresponding data for the complete page or surface generated. From the data of the sensors 31, 32, 33, 34 are derived from the controller 35 properties that are relevant for the verification of banknotes.
  • control device 35 the data of the sensors 31, 32, 33, 34 are processed and compared with reference data stored in the control device 35, whereupon the control device 35 determines the state of the bank notes, in particular whether the bank notes are genuine.
  • switches 24, 26 are driven, z. B. to deposit genuine banknotes in a first output tray 25, whereas counterfeit and / or counterfeit suspect banknotes can be stored in a second output tray 27.
  • the banknotes can also be fed to a further processing 28, z. As the destruction by means of a shredder or the filing in other output compartments.
  • the sensor arrangement 30 and / or the control device 35 of the device 10 is designed and / or operated such that the sensor arrangement 30 and / or the control device 35 and / or their operation is not or only made difficult for the authenticity check. measures can be taken. As a result, no conclusions about the feature substances contained in the banknotes are possible.
  • the checking of the feature substance (s) is only carried out by the control device 35 if at least it can be assumed that a banknote is present.
  • the verification of the feature substance (s) is thus used as a kind of verification of at least one of the previously performed measurements.
  • These other measurements are performed by the sensor assembly 30 and evaluated by the controller 35, and may include, for example, determining size, color, particular print patterns, particular security threads, and so forth. If, for example, a minimum number of the criteria examined is met, it can be assumed that a banknote is available. Only in this case does the control device 35 check the feature substances.
  • an evaluation of the data of the sensor arrangement 30 by the control device 35 can be made only after this time.
  • the first wavelength should be in the infrared range
  • light emitting diodes can be used which emit light in the visible wavelength range, since these usually have an infrared residual emission in the order of 1 percent of the radiated light output.
  • infrared and red LEDs can be used. In both cases, however, a filter in front of the sensor is dispensed with.
  • simultaneous excitation with different wavelengths may be performed to mask the excitation bands of the feature substance (s).
  • the different wavelengths can be realized, for example, by a plurality of light-emitting diodes which are accommodated in a single housing.
  • a masking of the particular first and second wavelengths used can be achieved if a measurement of so-called quasi-resonant feature substances takes place.
  • the first and second wavelengths are (approximately) the same, so that the evaluation of the remitted light is made more difficult because a masking takes place by the excitation light.
  • a further improvement of the protection of the device for verifying the authenticity of banknotes can be achieved if the control device 35, which undertakes the evaluation of the data of the sensor arrangement 30, is protected so that the checks carried out by it as well as the reference data used for this purpose are not spied out can be.
  • highly integrated circuits eg ASIC, FPGA, FPAA, etc.
  • a measurement of the photocurrent directly on the sensor or sensors is without manipulation of the device, for. B. by installing additional amplifier stages, because of the small currents of the signals of the sensor or sensors in the single-digit nA range not possible. It also prevents that the stored software and the reference data can be read out unauthorized, since they are protected by the hardware Warerealmaschine.
  • the protection of the controller 35 from spying can also be achieved or improved if only approved software can be loaded into the memory of the controller 35.
  • a direct write access to the memory should not be allowed from the outside.
  • Another measure to protect the software may be to check the integrity of the software in memory during operation, for example: For example, on the formation and testing of checksums. As a result, a change in the software can be detected, since in this case the determined check sum does not match the expected check sum.
  • the controller 35 causes the loading of the software into the working memory upon startup of the device and decrypts the software thereto.
  • a preprocessing unit of the control device 35 takes place, for. B. a digital signal processor.
  • the subsequent evaluation unit of the control device 35 then has no information about the feature substances. In this case, it is sufficient to protect the preprocessing unit or its software particularly, while the evaluation unit can remain unprotected.
  • An improvement in the protection of the device for verifying the authenticity of banknotes can also be achieved if special feature substances are used for the banknotes to be checked, whose measurement and evaluation necessitate special interdependent examination steps.
  • Special feature substances can also have different decay behavior.
  • a phosphorescent feature substance large decay time
  • a fluorescent feature substance small decay time
  • the fluorescent feature substance covers the phosphorescent feature substance, since both have the same emission wavelength.
  • it may be provided to provide a specific spatial arrangement of the feature substance (s), eg. Depending on the denomination of the banknotes.
  • feature substances which are absorbent or transparent for certain wavelength ranges, eg. B. for infrared light.
  • a feature substance is present on banknotes in different concentrations.
  • the feature substance may be present in the substrate of the banknotes in low concentration, whereas the same feature substance is present in higher concentration in certain areas of the banknotes, e.g. In certain pressure ranges.
  • a targeted evaluation of the feature substance is possible by means of different excitation pulses with the light of the first wavelength used for the illumination.
  • Short excitation pulses suppress the paper feature
  • long excitation pulses lift the paper feature out of the noise. This relationship results because with strong lightning, ie large amplitude (and / or long pulse width), the higher concentration area of the feature substance, eg. B. in the print image, is overdriven, while in low lightning, ie smaller amplitude (and / or short pulse width) of the existing in low concentration in the substrate feature substance is no longer detectable.
  • banknotes to be checked are alternately illuminated with strong flash and low flash, on the one hand the completeness of the banknotes can be detected by means of the feature substance present in low concentration in the entire substrate. On the other hand, codings, ie regions with a higher concentration of the feature substance, can also be detected.
  • the data thus obtained can be stored by banknotes verified upon deposit in order to be able to later identify these banknotes on the basis of these data and assign them to a depositor. This may be necessary, for example, if it turns out that one of the banknotes is forged.
  • these banknotes are processed again by means of a device for verifying the authenticity and the data thus acquired are compared with the stored data in order to be able to carry out the desired identification. It may be provided that takes into account the position in which the banknotes w ere r originally processed.
  • the variants described above can each be used individually in a device for checking banknotes. Likewise, they can be combined with each other or with other variants.
  • the transport system 23 has a high transport speed, it may be that the time available for the excitation of the feature substances is limited such that reliable generation of the light of the second wavelength by the feature substances is not ensured. In this case, additional illumination at the first wavelength may be placed in front of the sensor array 30, thereby extending the excitation time.
  • the transport system 23 may be configured such that it can be stopped for a short time.
  • the checking of the banknotes can then be carried out by means of an area camera (eg CCD camera) which photographs the respective banknote to be tested a certain time after illumination with light of the first wavelength.
  • the stopping of the bill can also be done when changing the direction of transport, z. B. at a change between longitudinal and transverse transport.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Abstract

La présente invention concerne un dispositif pour contrôler l'authenticité de billets de banque dans des zones non protégées. Ce dispositif comprend un système de détection qui contient une source de lumière produisant une lumière d'une première longueur d'onde avec laquelle les billets de banque à contrôler sont éclairés, en réponse à quoi une ou plusieurs substances caractéristiques présentes dans et/ou sur les billets de banque produisent une lumière d'une deuxième longueur d'onde qui est détectée par le système de détection. Le dispositif selon l'invention comprend par ailleurs un système de commande qui interprète les données du système de détection relatives à la lumière de la deuxième longueur d'onde et les compare avec des données de référence afin de déterminer l'authenticité des billets de banque. L'invention se caractérise en ce que la constitution et le fonctionnement du système de détection et/ou du système de commande ne permettent que difficilement de tirer des conclusions sur les substances caractéristiques présentes sur ou dans les billets de banque.
EP06806723A 2005-11-22 2006-11-21 Dispositif pour controler l'authenticite de billets de banque Ceased EP1955292A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005055682A DE102005055682A1 (de) 2005-11-22 2005-11-22 Vorrichtung für die Überprüfung der Echtheit von Banknoten
PCT/EP2006/011147 WO2007059923A1 (fr) 2005-11-22 2006-11-21 Dispositif pour controler l'authenticite de billets de banque

Publications (1)

Publication Number Publication Date
EP1955292A1 true EP1955292A1 (fr) 2008-08-13

Family

ID=37649547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06806723A Ceased EP1955292A1 (fr) 2005-11-22 2006-11-21 Dispositif pour controler l'authenticite de billets de banque

Country Status (4)

Country Link
US (1) US8139839B2 (fr)
EP (1) EP1955292A1 (fr)
DE (1) DE102005055682A1 (fr)
WO (1) WO2007059923A1 (fr)

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JP5367509B2 (ja) * 2009-08-27 2013-12-11 株式会社東芝 光検出装置、及びこの光検出装置を備える紙葉類処理装置
CA2760815A1 (fr) * 2010-02-01 2011-08-04 Lg Electronics Inc. Refrigerateur et son procede de commande
MX2012013994A (es) * 2010-06-03 2013-05-20 Spectra Systems Corp Adaptacion monetaria y deteccion de desgaste con el uso de deteccion infrarroja modulada por temperatura.
DE102010045879A1 (de) * 2010-09-17 2012-03-22 Giesecke & Devrient Gmbh Verfahren für die Bearbeitung von Banknoten
DE102010046024A1 (de) * 2010-09-20 2012-03-22 Giesecke & Devrient Gmbh Sensor zur Prüfung von Wertdokumenten
WO2016071771A2 (fr) * 2014-11-03 2016-05-12 American University Of Beirut Système optique anti-contrefaçon intelligent (sacos) pour la détection de la fraude à l'aide d'une technique avancée basée sur la spectroscopie
WO2018038731A1 (fr) * 2016-08-25 2018-03-01 Spectra Systems Corporation Système d'authentification de billet de banque à base optique ayant une discrimination de casse
DE102016011029A1 (de) 2016-09-13 2018-03-15 Giesecke+Devrient Currency Technology Gmbh Vorrichtung, System und Verfahren zur Prüfung von Wertdokumenten, insbesondere Banknoten
CN115131910B (zh) * 2022-05-30 2024-02-13 华中科技大学同济医学院附属协和医院 一种基于大数据的票据检验系统

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Also Published As

Publication number Publication date
US20090028415A1 (en) 2009-01-29
US8139839B2 (en) 2012-03-20
WO2007059923A1 (fr) 2007-05-31
DE102005055682A1 (de) 2007-05-24

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