EP1065631A1 - Méthode et dispositif de lecture de supports d'enregistrement en forme de feuille - Google Patents

Méthode et dispositif de lecture de supports d'enregistrement en forme de feuille Download PDF

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Publication number
EP1065631A1
EP1065631A1 EP00113141A EP00113141A EP1065631A1 EP 1065631 A1 EP1065631 A1 EP 1065631A1 EP 00113141 A EP00113141 A EP 00113141A EP 00113141 A EP00113141 A EP 00113141A EP 1065631 A1 EP1065631 A1 EP 1065631A1
Authority
EP
European Patent Office
Prior art keywords
signal
transmitter
reading station
signals
relative movement
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
Application number
EP00113141A
Other languages
German (de)
English (en)
Other versions
EP1065631B1 (fr
Inventor
Heinz Hornung
Achim Philipp
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 EP1065631A1 publication Critical patent/EP1065631A1/fr
Application granted granted Critical
Publication of EP1065631B1 publication Critical patent/EP1065631B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G07D7/06—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
    • G07D7/121—Apparatus characterised by sensor details

Definitions

  • the present invention relates to a method and an apparatus for Reading of sheet-like record carriers during a relative movement compared to a reading station that has at least one transmitter for sequential Emitting at least two signals of different signal types, a common receiver for the different signal types Detect these signals and modulated by the record carrier has an evaluation unit for the detected signals.
  • This reading station detects a "measuring surface" on the recording medium at any time with a certain length in the direction of relative movement. Due to the Relative movement occurs when the record carrier is scanned in cycles per clock a "raster element" of the record carrier is detected is larger than the measuring area of the reading station. The size of the grid element decreases with the relative speed and the duration of a signal emission (“Signal clock”) too.
  • Such methods and devices are used, for example, to: to determine the currency and value of banknotes and them to check for their authenticity or validity.
  • Banknotes A corresponding device for reading and checking the authenticity Banknotes are described in EP 0 537 513 A1.
  • the Banknotes passed a reading station, which consists of several transmitters for emitting light of different colors or infrared signals and a common recipient.
  • the banknote opposite the reading station will be the different Signals sequentially emitted onto the banknote.
  • the recipient catches that reflected from the banknote or transmitted through the banknote and consequently signal modulated by the banknote. This signal will then evaluated.
  • a bank note checking device which the Passing banknote only in three, side by side transverse to the direction of movement lying, short sections with different signal types scans. This involves multiple oversampling for each section carried out. This results in a very large amount of measurement data and a slow conveying speed in relation to the scanning frequency. Moreover only certain, strip-like areas of the banknote surface scanned.
  • the invention has for its object a method and an apparatus specify at the highest possible conveying speed a full-surface scan of the record carrier with respect to at least two physical properties is possible.
  • a suitable design of the transmitter and / or receiver geometry Reading station and by an appropriate choice of the relative speed and the cycle times ensured that the length of the detected by the reading station Measuring surface for each of the signal types corresponds exactly to the path length, which the recording medium is in one from the beginning of the radiation Signal type up to the beginning of the next radiation in the same Signal type ("period") moved.
  • the cycle times are determined by both Length of each signal clock of the different signal types as well influenced by the distances between the signal clocks.
  • Words become the geometric parameters of the reading station and the time parameters the sampling selected so that with successive signal clocks different signal type the length of the detected by the reading station Measuring area exactly the spatial distance from the start or end of two Signal clocks corresponds to the same signal type.
  • the spatial distance between two Signal clocks is thus determined by the time interval between the clocks, i.e. the duration given a period multiplied by the relative speed. On in this way gaps are avoided.
  • the double-scanned areas are special because of the selected geometry and time parameters only around the border areas of the raster elements that come from the reading station during a bar "Measured” measuring surface "run out” or “run” into the measuring surface and which is therefore not captured by the reading station over the entire cycle duration as is the case with the other areas of the raster element.
  • This "underrepresentation" of the edge areas within a signal cycle becomes by double sampling in two successive signal cycles exactly balanced. Since the areas on the record carrier are consequently with a high level of reading reliability, they can be completely read without having to read multiple times high throughput is possible on the one hand and on the other hand the processing and storage effort for the measurement data is relatively low.
  • the transmitter can be, for example, a transmitter with different ones Lighting systems act in the wavelength distinguish, that is, which light of different colors or infrared signals send out. At least one of the signals is preferred an infrared signal and at least one further signal a light signal certain wavelength in the visible range.
  • the sampling is done at least with a brightfield signal and a darkfield signal. It
  • the transmitter or the receiver are formed so that the grid element is in a line shape transverse to the relative movement extends over the entire record carrier.
  • a strip-shaped transmitter in the form of a lighting device with a slit diaphragm, and a correspondingly arranged strip-shaped CCD receiver or another sensor with a corresponding upstream optics, for example a rod lens will be realized.
  • a rod lens With such a system can be simple and quickly captures the entire surface of the record carrier and to be read.
  • FIG. 1 shows a schematic representation of a reading station 2, wherein for the sake of simplicity, only one transmitter 3 is shown, which is located below of the record carrier 1, here a banknote 1. At this reading station 2, the transmission of banknote 1 is checked.
  • the transmitter 3 consists of an illumination device 5 and an illumination optics 6 in the form of a slit diaphragm.
  • the receiver 4 consists of a Sensor 7 and an upstream sensor optics 8, here a rod lens.
  • the banknote 1 is passed between the transmitter 3 and the receiver 4 in the transport direction R.
  • the corresponding selection and arrangement of the lighting device 5, the lighting optics 6, the sensor optics 8 and the measuring sensor 7 result in a specific lighting characteristic on the bank note 1 with a lighting gap of a specific width.
  • This gap width corresponds exactly to the length s B of the measuring surface in the direction of movement R detected by the reading station 2 during a specific point in time.
  • FIGS. 2a and 2b show the changing position of the measuring surface on the banknote 1 while moving along the transport direction R.
  • FIG. 2a shows the position at the beginning of an exposure time with a specific signal, ie at the beginning of a signal cycle, and FIG. 2b at the end of this exposure time, ie at the end of the cycle.
  • the bank note 1 has been shifted at a constant relative speed exactly by the distance l 1 in the transport direction R.
  • the points A and D on the banknote 1 lie outside the measurement area during the entire exposure time.
  • points B and C lie within the measurement area during the entire exposure time.
  • the points in the range between B and C therefore contribute maximally to the measured value.
  • the points between A and B and between C and D only make a partial contribution to the measured value, since they slide into the measuring surface or move out of the measuring surface during the exposure time.
  • a measured value of a specific signal clock contains information from all points on bank note 1 between points A and D.
  • the distance between A and D is therefore the extent of the scanned raster element in the direction of movement.
  • dose P which is determined by the intensity 1 of the signal multiplied by the time that the point in question lies within the measurement area during the signal cycle.
  • the length of the ramps AB or DC of the dose distribution depends on the duration of the signal cycles for a given measuring surface geometry and a given relative speed. It corresponds exactly to the path length l 1 which the bank note 1 covers during the cycle duration T 1 . It is therefore essential that during a signal cycle the bank note 1 only covers a distance l 1 which is smaller than the length s R of the measuring surface. In order to achieve a seamless scanning of the banknote, it is sufficient if the following signal cycle of the same signal type starts again, if the point located at the beginning of the first cycle in the transport direction R on the front edge of the measuring surface (point B in FIG. 2a) that Has reached the end of the measuring surface.
  • the grid elements are gaps relative to each other in such a way that only the areas between points A and B and C and D of two successive grid elements of length s R overlap. Due to the uniform speed and the resulting linear increase or decrease in the dose P in these areas, the dose of these points detected in the adjacent raster elements again adds up to exactly 100% (FIG. 3). This means that every point on the record carrier is viewed with the same sensitivity. His information is therefore always 100% scanned. However, it can be distributed over two adjacent measured values. This is independent of the cycle length.
  • the time between two signal clocks of a signal type Q 1 that is to say the duration T of the period minus the clock duration T 1 , can now be used to scan the bank note 1 with signals of another signal type Q 2 , Q 3 (FIG. 4).
  • a corresponding width of the illumination gap for these further signals that is to say a corresponding length s B of the measuring surfaces with respect to this type of signal, can also be used to achieve a complete scanning in the same way.
  • the illumination gap width or length s B of the measuring surfaces is identical in each case.
  • the distances l 1 , l 2 , l 3 , l 0 covered during the individual time periods T 1 , T 2 , T 3 , T 0 add up again exactly to the length s B of the measuring surface, ie to the width of the illumination gap.
  • the individual signal durations T 1 , T 2 , T 3 of different signal types Q 1 , Q 2 , Q 3 do not necessarily have to add up to 100% within the period T.
  • the individual signal durations T 1 , T 2 , T 3 can also be different, so that, for example, one signal type Q 1 has a shorter signal duration T 1 within one period and the other signal types Q 2 , Q 3 have a longer signal duration T 2 , M 3 .
  • a time T 0 remaining within the period of signals can be used, for example, to read out the sensors or to carry out calibration measurements or the like.
  • FIG. 5 shows the position of the measuring surfaces 10, 20 for two different signal types, here measuring surfaces 10 of a red color signal and measuring surfaces 20 of an infrared signal.
  • the measuring surfaces 10, 20 of the two signal types are shifted from one another on the bank note 1.
  • Measuring surfaces 10, 20, which do not extend over the entire width of the bank note 1, are shown here for better visibility.
  • only two measuring surfaces 10 of the red light signal are shown.
  • the dashed line shows, by way of example, the overlap area or the length s R of the raster element 20 on a series of measuring surfaces 20 of the infrared signal.
  • the method according to the invention offers a complete, full-surface scanning the banknote with high banknote throughput.
  • your measurement data only a small amount of processing and storage is required.
  • the invention is of course not based on reading and checking banknotes, but can also be used for any other Record carriers are used.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Length Measuring Devices By Optical Means (AREA)
EP00113141A 1999-07-02 2000-06-29 Méthode et dispositif de lecture de supports d'enregistrement en forme de feuille Expired - Lifetime EP1065631B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19930651A DE19930651C2 (de) 1999-07-02 1999-07-02 Verfahren und Vorrichtung zum Lesen blattförmiger Aufzeichnungsträger
DE19930651 1999-07-02

Publications (2)

Publication Number Publication Date
EP1065631A1 true EP1065631A1 (fr) 2001-01-03
EP1065631B1 EP1065631B1 (fr) 2010-03-24

Family

ID=7913495

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EP00113141A Expired - Lifetime EP1065631B1 (fr) 1999-07-02 2000-06-29 Méthode et dispositif de lecture de supports d'enregistrement en forme de feuille

Country Status (3)

Country Link
EP (1) EP1065631B1 (fr)
AT (1) ATE462173T1 (fr)
DE (2) DE19930651C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1276079A1 (fr) * 2001-07-11 2003-01-15 Banque De France Procédé d'authentification d'un document de sécurité par analyse multifréquence, et dispositif associé
DE10212734A1 (de) * 2002-03-21 2003-10-09 Accu Sort Systems Inc Verfahren und Vorrichtung zur Identifikation und Authentifikation eines Gegenstandes
WO2012084240A1 (fr) * 2010-12-22 2012-06-28 Giesecke & Devrient Gmbh Procédé pour générer une image numérique d'au moins une partie d'un document de valeur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2107911A (en) 1981-10-22 1983-05-05 Cubic Western Data Currency note validator
EP0537513A1 (fr) 1991-10-15 1993-04-21 URMET S.p.A. Costruzioni Elettro-Telefoniche Appareil de validation de billets de banque
GB2309299A (en) * 1996-01-16 1997-07-23 Mars Inc Optical sensing device for documents

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2103330T3 (es) * 1991-10-14 1997-09-16 Mars Inc Dispositivo para el reconocimiento optico de documentos.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2107911A (en) 1981-10-22 1983-05-05 Cubic Western Data Currency note validator
EP0537513A1 (fr) 1991-10-15 1993-04-21 URMET S.p.A. Costruzioni Elettro-Telefoniche Appareil de validation de billets de banque
GB2309299A (en) * 1996-01-16 1997-07-23 Mars Inc Optical sensing device for documents

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1276079A1 (fr) * 2001-07-11 2003-01-15 Banque De France Procédé d'authentification d'un document de sécurité par analyse multifréquence, et dispositif associé
FR2827410A1 (fr) * 2001-07-11 2003-01-17 Banque De France Procede d'authentification d'un document de securite par analyse multifrequence, et dispositif associe
DE10212734A1 (de) * 2002-03-21 2003-10-09 Accu Sort Systems Inc Verfahren und Vorrichtung zur Identifikation und Authentifikation eines Gegenstandes
DE10212734B4 (de) 2002-03-21 2022-06-02 Accu-Sort Systems, Inc. Verfahren und Vorrichtung zur Identifikation und Authentifikation eines Gegenstandes
WO2012084240A1 (fr) * 2010-12-22 2012-06-28 Giesecke & Devrient Gmbh Procédé pour générer une image numérique d'au moins une partie d'un document de valeur
US9904989B2 (en) 2010-12-22 2018-02-27 Giesecke + Devrient Currency Technology Gmbh Method for generating a digital image of at least one section of a value document

Also Published As

Publication number Publication date
DE19930651A1 (de) 2001-01-11
DE50015894D1 (de) 2010-05-06
DE19930651C2 (de) 2003-04-10
EP1065631B1 (fr) 2010-03-24
ATE462173T1 (de) 2010-04-15

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