EP1059620A1 - Piezo-Effekt-basiertes Sicherheitsmerkmal an Wert- und Sicherheitsdokumenten und dazugehöriges Nachweisverfahren - Google Patents
Piezo-Effekt-basiertes Sicherheitsmerkmal an Wert- und Sicherheitsdokumenten und dazugehöriges Nachweisverfahren Download PDFInfo
- Publication number
- EP1059620A1 EP1059620A1 EP00110861A EP00110861A EP1059620A1 EP 1059620 A1 EP1059620 A1 EP 1059620A1 EP 00110861 A EP00110861 A EP 00110861A EP 00110861 A EP00110861 A EP 00110861A EP 1059620 A1 EP1059620 A1 EP 1059620A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- security
- piezo
- value
- elements
- security feature
- 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.)
- Granted
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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
- G07D7/02—Testing electrical properties of the materials thereof
Definitions
- the invention relates to a security feature and a corresponding Verification procedure for value and security documents which on the piezo effect is based.
- the invention is therefore based on the object, a security and To further develop a document of value of the type mentioned at the outset such that another Security feature can be added.
- the purpose of such This is intended to expand the document. So it should be in addition to optical detection of security features still detection in another frequency range be made possible.
- An additional object of the present invention is in that a method for the detection of this security feature is described becomes.
- the solution to the first task essentially takes place in that the value and Security document is equipped with piezoelectric properties.
- the second task is solved essentially by the fact that the value and Security document is exposed to the signals, the piezoelectric Properties are exploited. The emitted by the piezo elements Signals are then recorded and evaluated.
- Piezoelectric security features equipped, so these mechanically (e.g. by striking or acoustically) or optionally electrically stimulate and detect and evaluate their answers. From the system response of the value and security document can be used on the materials and conclude from their geometric dimensions. A comparison of the device under test and Reference patterns allow a distinction between real and counterfeit securities or products too.
- Elements are referred to as ⁇ m particles whose geometric dimensions in the Range of ⁇ m.
- the piezos react with vibrations, which in turn are transmitted electrically or mechanically (acoustically) and evaluated appropriately can.
- the natural frequencies of these vibrations are one very significant characteristics for the types of materials used and their geometric dimensions.
- the Signal attenuation (FFT) of a transmitted signal can be evaluated.
- piezoelectrically effective in such a value and security document Particles are embedded. It depends on the grain size and the type and The arrangement of these particles is not detailed. You can either evenly be embedded in the material of the value and security document, whereby but also heaped up at certain points in the value and security document could occur.
- a PVDF film is an example of such a polymer film.
- Such elements can also - as before executed - either on the surface or on the surface of the value and Security document attached or embedded in the surface become.
- quartz that is preferably used crystallizes in hexagonal prisms. According to its atomic structure, it has 3 polar ones electrical axes, 3 mechanical neutral axes and one perpendicular to them standing optical axis. The crystal then becomes parallel plates cut out, which are suitable as feelers.
- the invention is not based on the use of single crystal crystals limited, but - as stated earlier - crystal glomorates be used or sintered crystals.
- ceramic bodies can also be used which are also known to have a piezoelectric effect.
- Such a piezo material is preferably excited with a acoustic or electrical impulse.
- a Signal source take place in which all frequencies are present, that is, a broadband, white noise generated.
- excitation by means of a laser pulse can also be used respectively.
- the vibration response of the piezo material is in the sense of a natural frequency of this material. So when a single pulse excites, it becomes Piezo material excited to vibrate and vibrates over a certain one Pulse duration with a natural frequency that is outside the security and Value document can be recorded and evaluated.
- the frequency of the The vibration response lies in the kilohertz right up to the gigahertz range and can be recorded and evaluated with appropriate transducers become.
- a single pulse generator is therefore preferred for vibration excitation used that mechanically a single pulse on the value to be tested and Issues security document and with appropriate sensor technology the vibration response is then recorded and evaluated.
- permanent excitation can be achieved using a white Noise occur, which via a corresponding vibration generator on the value and security document.
- the suggestion of the value and security document in the Feedback operation takes place, i.e. it becomes a certain excitation frequency used; the response frequency is then examined and on the Excitation frequency fed back so as to receive vibration excitation and to excite the piezo material in the region of its resonance frequency.
- the type of resonance frequency is then an image of the vibration characteristic of the Piezomaterials and therefore characteristic as (fingerprint) for the Security feature, which is housed in the security document. It So this is a peak pattern that is not in one characteristic frequency is generated, but in a certain Frequency band.
- the resonance frequency depends on the geometry of the individual piezo grain.
- the effects described above are of course used in the same way for the Piezoelectric film, PVDF film already described above, which in the is excited in the same way and generates a corresponding vibration response.
- a value document 1 is generally shown, in which a piezo material 2 is embedded.
- the embedding can take place during the paper production, so that the piezo material 2 in the form of individual granules, grains, Crystal structures and the like are embedded in the material of the paper.
- the value document 1 does not have to be made from a paper material consist; it can also be a plastic, a multi-laminated plastic or any other material in which the piezo material is embedded.
- the vibration sensor 5 can be designed as a microphone, i.e. the Vibration response is an acoustic wave emitted by the vibration sensor 5 is added. As a result, the vibration sensor 5 itself can also be designed as a crystal or piezo crystal microphone.
- the vibration sensor 5 has a Amplifier 6 connected, which in turn at its output to a frequency analyzer 7 is connected, which spectrally evaluates the vibration response 4.
- the Frequency analyzer 7 is then connected to a display device which then a true / false statement is generated.
- the right half section in Figure 2 shows that the piezo materials 2 also with a corresponding coating 9 can be covered.
- the coating 9 can be designed as a lacquer, a film, a printing ink or the like.
- the general principle of the piezo crystal is shown in FIG. It is recognizable that in the mechanical equivalent of two pressure plates 10.11 from both sides the piezo material 2 act and a compressive force 12, 13 on each Pressure plate 10.11 acts.
- the invention is not based on this limited; it can completely the pressure plate 11 and the associated pressure force 13 omitted, because the application of a force from above via a corresponding one Vibration generator is completely sufficient, after yes, the piezo material 2 is embedded in a solid substrate or in a solid substrate.
- This equivalent circuit diagram according to FIG. 3 is intended to show that due to the introduction of vibration, the piezo material 2 begins in the arrow directions 14 to swing and there is a corresponding surface charge 15, 16 comes, which is always reversed, so that - according to Figure 4 - then due to the polarity reversing surface loadings 15, 16 leads to a vibration emission, i. So to a vibration response 4 comes.
- Such a prepaid card can be a passport card, an identity card Driving license or other security or credit card.
- piezo film 18 there is an upper laminate layer 19, which a covers piezoelectrically active film (piezo film 18).
- This piezo film is one Polymer films that have piezoelectric properties. Accordingly becomes a Initiation 3 initiated on the piezo film 18, which answers with a Vibration response 4, which is correspondingly carried out by an evaluation unit according to FIG. 1 can be evaluated.
- the Evaluation is carried out by two capacitor plates 24, 25, the between them Record prepaid card 17. After the vibration response 4, the dielectric changed between the capacitor plates 24, 25, a corresponding one Measuring arrangement which measures the impedance between the capacitor plates 24, 25 are used to evaluate the vibration response 4.
- Substrate layer 20 can be arranged, which in turn down by a Laminate layer 19 is covered.
- FIG. 6 shows that larger piezo elements 21 can also be created, consisting of a collection of piezo crystals 23, e.g. through a Sintering processes are sintered together. So it's one Piezo crystal.
- the individual piezo crystals 23 in a carrier substance 22 be bound, e.g. is a plastic.
- the vibration response 4 is evaluated by appropriate sensors. It can be used instead of the evaluation the frequency of the vibration response but also the running time. If namely the time of vibration excitation is all that is needed to be measured at what time the vibration response 4 am Transducer 5 is measurable so as to enable a transit time measurement. Instead of the frequency evaluation can therefore instead take a transit time measurement become. With this runtime measurement, it is still possible to determine the exact time Position (depth of the piezo materials) in the value document to be checked to testify, because the duration of the vibration response is a measure of in what depth the piezo material 2 is embedded in the document.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Credit Cards Or The Like (AREA)
Abstract
Description
- piezoelektrische µm-Partikel den Druckfarben oder anderen Auftragsschichten beigemengt werden,
- piezoelektrische µm-Partikel dem Grundwerkstoff des Sicherheitsproduktes (z.B. Papier, Folien, Glas) während der Herstellung beigemengt werden,
- metallisierte Piezopolymerfolien im µm-Bereich als Zwischen- und/oder Auflage in bzw. auf das Werkpapier/Produkt gebracht werden (kleben, laminieren, laserschweißen etc), oder
- Piezokeramikplättchen mit Dicken sehr viel kleiner 100µm einlaminiert werden.
- Figur 1:
- schematisiert einen Schnitt durch ein Wertdokument in einer ersten Ausführungsform mit Darstellung der Auswerteeinheit,
- Figur 2:
- zwei Halbschnitte durch ein Wert- und Sicherheitsdokument mit zwei verschiedenen Ausführungsbeispielen der Anbringung des Piezomaterials,
- Figur 3:
- die Erläuterung der mechanischen Wirkungsweise des Piezo-Materials bei dessen Anregung,
- Figur 4:
- eine gegenüber Figur 3 abgewandelte Ausführungsform, bei der das Piezo-Material mittels eines Impulses angeregt wird,
- Figur 5:
- Schnitt durch ein in Kartenform laminiertes Wertdokument mit piezoelektrischen Eigenschaften,
- Figur 6:
- der vergrößerte Schnitt durch ein Piezo-Element mit einzelnen Piezo-Kristallen.
- 1
- Wertdokument
- 2
- Piezo-Material
- 3
- Anregung 3a
- 4
- Schwingungsantwort
- 5
- Schwingungsaufnehmer
- 6
- Verstärker
- 7
- Frequenzanalysierer
- 8
- Anzeigevorrichtung
- 9
- Beschichtung
- 10
- Druckplatte
- 11
- Druckplatte
- 12
- Druckkraft
- 13
- Druckkraft
- 14
- Pfeilrichtung
- 15
- Oberflächen-Ladung
- 16
- Oberflächen-Ladung
- 17
- Wertkarte
- 18
- Piezofolie
- 19
- Laminatschicht
- 20
- Substratschicht
- 21
- Piezoelement
- 22
- Trägersubstanz
- 23
- Piezokristalle
- 24
- Kondensatorplatte
- 25
- Kondensatorplatte
Claims (16)
- Sicherheitsmerkmal für Wert- und Sicherheitsdokumente dadurch gekennzeichnet, daß in und/oder auf Wert- und Sicherheitsdokumenten (1) Sicherheitselemente (2) mit Piezoeffekteigenschaften ein- bzw. aufgebracht sind.
- Sicherheitsmerkmal nach Anspruch 1, dadurch gekennzeichnet, daß die Piezoelemente (2) einzeln angeordnet in und/oder auf dem Sicherheitsdokument (1) verteilt sind.
- Sicherheitsmerkmal nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Piezoelemente (2) in Kristallstruktur in einem Verbund von mehreren Elementen (21) ausgebildet sind.
- Sicherheitsmerkmal nach einem der Ansprüche 1, 2 oder 3 dadurch gekennzeichnet, daß die Piezoelemente (2) in gemischter Anordnung sowohl als einzelne Partikel als auch in Kristallstruktur in einem Verbund von mehreren Elementen (21) ausgebildet sind.
- Sicherheitsmerkmal nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Sicherheitsmerkmale (2) in Form einer Polymerfolie ausgebildet sind.
- Sicherheitsmerkmal nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß metallisierte Piezopolymerfolien (2) in µm-Schichtdicke als Zwischen- und/oder Auflage in bzw. auf das Werkpapier/Produkt gebracht sind.
- Sicherheitsmerkmal nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Piezoelemente (2) mittels einer Abdeckschicht (9) abgedeckt sind.
- Sicherheitsmerkmal nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß das piezoeffektbasierende Sicherheitsmerkmal (2, 21) in Kombination mit wenigstens einem weiteren auf einem anderen physikalischen Prinzip beruhendem Sicherheitsmerkmal in und/oder auf einem Wert- und Sicherheitsdokument (1) aufgebracht ist
- Verfahren zur Überprüfung von Sicherheitsmerkmalen auf Piezoeffektbasis, dadurch gekennzeichnet, daß Wert- und Sicherheitsdokumente (1) mit wenigstens einem Signal beaufschlagt und die Schwingungsantworten der Sicherheitselemente (2, 21) erfaßt und ausgewertet werden.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die charakteristische Resonanzfrequenz als Abbild der Schwingungseigenschaft des Piezomaterials (2, 21) im bzw. auf dem Wert- und Sicherheitsdokument über den Piezoeffekt als Echtheitsnachweis überprüft wird.
- Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß selbsterregte Schwingungen des mit Piezomaterial ausgestatteten Wert- und Sicherheitsdokuments angeregt werden und die Frequenzen der selbsterregten Schwingungen außerhalb des Wert- und Sicherheitsdokuments erfaßt und ausgewertet werden.
- Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, daß eine Daueranregung mittels eines weißen Rauschens erfolgt, welches über einen entsprechenden Schwingungserzeugers auf das Wert- und Sicherheitsdokument (1) aufgegeben wird.
- Verfahren nach einem der Ansprüche 9 bis 12 , dadurch gekennzeichnet, daß die Anregung der Sicherheitsmerkmale (2, 21) durch Rückkopplungsverfahren erfolgt.
- Verfahren nach einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, daß die Piezoelemente (2, 21) mechanisch angeregt werden.
- Verfahren nach einem der Ansprüche 9 bis 14, dadurch gekennzeichnet, daß die Piezoelemente (2,21) akustisch angeregt werden.
- Verfahren nach einem der Ansprüche 9 bis 15, dadurch gekennzeichnet, daß die Piezoelemente (2,21) elektrisch angeregt werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19926010A DE19926010C2 (de) | 1999-06-08 | 1999-06-08 | Wert- und Sicherheitsdokument mit Sicherheitsmerkmal mit Piezo-Effekt-basierten Eigenschaften und dazugehöriges Nachweisverfahren |
DE19926010 | 1999-06-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1059620A1 true EP1059620A1 (de) | 2000-12-13 |
EP1059620B1 EP1059620B1 (de) | 2013-02-20 |
Family
ID=7910497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00110861A Expired - Lifetime EP1059620B1 (de) | 1999-06-08 | 2000-05-23 | Piezo-Effekt-basiertes Sicherheitsmerkmal an Wert- und Sicherheitsdokumenten und dazugehöriges Nachweisverfahren |
Country Status (3)
Country | Link |
---|---|
US (1) | US6659351B1 (de) |
EP (1) | EP1059620B1 (de) |
DE (1) | DE19926010C2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6659351B1 (en) * | 1999-06-08 | 2003-12-09 | Bundesdruckerei Gmbh | Electric effect-based security feature on security documents and on documents of value-proof process belonging thereto |
WO2005116941A1 (de) | 2004-05-07 | 2005-12-08 | Bundesdruckerei Gmbh | Vorrichtung zur echtheitsprüfung eines wert- oder sicherheitsdokuments |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10163266A1 (de) * | 2001-12-21 | 2003-07-03 | Giesecke & Devrient Gmbh | Wertdokument und Vorrichtung zur Bearbeitung von Wertdokumenten |
DE102004044184B4 (de) * | 2004-08-13 | 2013-02-21 | Physik Instrumente (Pi) Gmbh & Co. Kg | Miniaturisierbarer Motor |
DE102005021815A1 (de) * | 2005-05-04 | 2006-11-09 | Azzurro Semiconductors Ag | Sicherheitsmerkmal und Gerät zum Überprüfen des Sicherheitsmerkmals |
BRPI0717416A2 (pt) * | 2006-09-21 | 2013-11-12 | Prometheus Lab Inc | Método para realizar um imunoensaio complexo de alta produtividade, e, arranjo |
MX2009003560A (es) * | 2006-10-04 | 2009-06-23 | Australia Reserve Bank | Documento de seguridad que contiene un dispositivo de autentificacion. |
AU2008276251B2 (en) * | 2007-07-13 | 2014-04-24 | Nestec S.A. | Drug selection for lung cancer therapy using antibody-based arrays |
NZ600339A (en) | 2008-02-25 | 2013-12-20 | Nestec Sa | Drug selection for breast cancer therapy using antibody-based arrays |
DE102009031385A1 (de) * | 2009-07-01 | 2011-01-05 | Giesecke & Devrient Gmbh | Verfahren, tragbarer Datenträger und System zum Freigeben einer Transaktion |
JP5795311B2 (ja) | 2009-07-15 | 2015-10-14 | ネステク ソシエテ アノニム | 抗体ベースのアレイを使用する胃癌療法のための薬物選択 |
DE102012201863B3 (de) | 2012-02-08 | 2013-05-02 | Physik Instrumente (Pi) Gmbh & Co. Kg | Ultraschallaktor |
US10921579B2 (en) | 2014-12-24 | 2021-02-16 | National Research Council Of Canada | Dynamic security device |
KR20170053109A (ko) * | 2015-11-05 | 2017-05-15 | 주식회사 모다이노칩 | 압력 센서 및 이를 구비하는 복합 소자 |
US10150325B2 (en) | 2016-02-29 | 2018-12-11 | X-Celeprint Limited | Hybrid banknote with electronic indicia |
US10150326B2 (en) | 2016-02-29 | 2018-12-11 | X-Celeprint Limited | Hybrid document with variable state |
US10198890B2 (en) | 2016-04-19 | 2019-02-05 | X-Celeprint Limited | Hybrid banknote with electronic indicia using near-field-communications |
US9997102B2 (en) | 2016-04-19 | 2018-06-12 | X-Celeprint Limited | Wirelessly powered display and system |
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WO1999001292A1 (en) * | 1997-06-30 | 1999-01-14 | Measurement Specialties, Inc. | Security thread |
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FR2478695A1 (fr) * | 1980-03-21 | 1981-09-25 | Aussedat Rey | Papier de surete a particules luminescentes, son procede de fabrication, et procede de fabrication desdites particules |
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US5145518A (en) * | 1990-06-27 | 1992-09-08 | Xerox Corporation | Inks containing block copolymer micelles |
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GB2332645B (en) * | 1997-12-19 | 2001-08-29 | Amp Gmbh | Method of detecting a piezoelectric security thread |
DE19926010C2 (de) * | 1999-06-08 | 2003-01-30 | Bundesdruckerei Gmbh | Wert- und Sicherheitsdokument mit Sicherheitsmerkmal mit Piezo-Effekt-basierten Eigenschaften und dazugehöriges Nachweisverfahren |
-
1999
- 1999-06-08 DE DE19926010A patent/DE19926010C2/de not_active Expired - Lifetime
-
2000
- 2000-05-23 EP EP00110861A patent/EP1059620B1/de not_active Expired - Lifetime
- 2000-06-05 US US09/586,639 patent/US6659351B1/en not_active Expired - Fee Related
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US4763927A (en) * | 1984-06-06 | 1988-08-16 | Gao Gesellschaft Fur Automation Und Organisation Mbh. | Security document |
WO1999001292A1 (en) * | 1997-06-30 | 1999-01-14 | Measurement Specialties, Inc. | Security thread |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6659351B1 (en) * | 1999-06-08 | 2003-12-09 | Bundesdruckerei Gmbh | Electric effect-based security feature on security documents and on documents of value-proof process belonging thereto |
WO2005116941A1 (de) | 2004-05-07 | 2005-12-08 | Bundesdruckerei Gmbh | Vorrichtung zur echtheitsprüfung eines wert- oder sicherheitsdokuments |
Also Published As
Publication number | Publication date |
---|---|
DE19926010A1 (de) | 2000-12-14 |
DE19926010C2 (de) | 2003-01-30 |
US6659351B1 (en) | 2003-12-09 |
EP1059620B1 (de) | 2013-02-20 |
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