EP1050855A1 - Dispositif pour détecter un identificateur magnétique d'un objet à tester - Google Patents

Dispositif pour détecter un identificateur magnétique d'un objet à tester Download PDF

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Publication number
EP1050855A1
EP1050855A1 EP99810393A EP99810393A EP1050855A1 EP 1050855 A1 EP1050855 A1 EP 1050855A1 EP 99810393 A EP99810393 A EP 99810393A EP 99810393 A EP99810393 A EP 99810393A EP 1050855 A1 EP1050855 A1 EP 1050855A1
Authority
EP
European Patent Office
Prior art keywords
magnetic field
field sensors
magnetic
banknote
sensors
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.)
Withdrawn
Application number
EP99810393A
Other languages
German (de)
English (en)
Inventor
Martin Dr. Paping
Markus Jungen
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.)
De la Rue International Ltd
Original Assignee
Ascom AG
De la Rue International Ltd
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 Ascom AG, De la Rue International Ltd filed Critical Ascom AG
Priority to EP99810393A priority Critical patent/EP1050855A1/fr
Priority to PCT/CH2000/000206 priority patent/WO2000068899A1/fr
Priority to EP00914004A priority patent/EP1181672A1/fr
Priority to AU35483/00A priority patent/AU3548300A/en
Priority to TW089108729A priority patent/TW446920B/zh
Publication of EP1050855A1 publication Critical patent/EP1050855A1/fr
Withdrawn legal-status Critical Current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
    • G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint

Definitions

  • the invention relates to a device for detecting a with a magnetic identifier provided test object guided on a transport track with several magnetic field sensors and at least one magnetizing agent.
  • the invention further relates on a banknote checking machine with such a device.
  • EP 0 640 841 A1 describes a device for checking the magnetic property an American banknote.
  • the first Head applies a saturation field. If the banknote is out of the sphere of influence away from this head, a magnetic saturation remanence is maintained, which is from the second head, which can be combined with the first to form a structural unit, is read.
  • the third head turns a non-saturating field of opposite polarity on and the fourth head reads the magnetic remanence field. If the banknote is true, the remanence field signals read by the second and fourth head are opposite the same, i.e. out of phase by 180 °. Counterfeit with high coercivity show different behavior and can be recognized.
  • the method known from EP 0 640 841 A1 therefore measures the magnetic behavior (Hysteresis curve) of a magnetizable layer with low particle density.
  • Sensor arrangements are also known with which the different strip spacings a US banknote can be detected.
  • the WO is an example 94/12952 cited.
  • the object of the invention is to provide a device of the type mentioned, which without the need for a structural change to test a variety of different ones magnetic characteristics is suitable.
  • the solution to the problem is defined by the features of claim 1.
  • the structural unit also includes parts that extend across the entire width Means for magnetizing a test area.
  • the invention makes it possible to use automatic test machines for different currencies with a standardized unit for the review of whatever magnetic identifier.
  • the differentiation related to the test object can be achieved purely in software. In other words, the hardware is with everyone Applications are the same, only different (specific) software is loaded.
  • the magnetizing means preferably comprise one that extends over the entire width Permanent magnet. To this magnetic field in the surface of the test object to bring, two can also extend across the entire width of the transport path Pole shoes with a gap in between may be provided.
  • the field for biasing or saturating the layer can also be electromagnetic Funds are generated.
  • Hall element sensors of the type as they are preferred as magnetic field sensors are described in EP 0 772 046 A2 (Sentron AG). These can be in integrate a chip and have a small space requirement. You can use low field strengths Detect parallel to the chip surface and are relatively insensitive to the outside Interference fields (e.g. also against stray fields of the magnetizing agent).
  • a magnetic field sensor of the type described has two flux concentrators with one air gap in between and at least one Hall element outside the air gap on. At least part of that from the first flow concentrator to the second flow concentrator leading field lines of the magnetic field flood the Hall element.
  • the above Sensors can be integrated on a chip using the known techniques of microelectronics become.
  • Such a so-called cylindrical Hall element is sensitive to the magnetic field, parallel to the surface in which the magnetic flux concentrators are integrated. Overall, such an element is particularly good at the direction of magnetization Customized banknote.
  • the sensors can be offset in two from each other arranged rows must be built. So the sensors are in the back row in the spaces between those in the front row. The two rows will be arranged as close together as possible.
  • the distance between the rows is e.g. in the order of magnitude the distance of the sensors within a row. Will the banknotes Transversely to their longitudinal direction, are typically per row according to the invention several dozen sensors are provided. A geometric resolution in the Range of a few millimeters can be achieved.
  • the magnetic field sensors are advantageously arranged on a plate-shaped carrier element, which is on the end face and essentially perpendicular to a circuit board is attached for signal processing.
  • the carrier element (with all Hall sensors) is considerably smaller than the circuit board mentioned (which are equipped on both sides can). The result is a compact T-shaped construction.
  • the dimensions of the Unit in the direction of the note transport direction can be minimized.
  • the magnetic field sensors can be behind a Cover (z. B. a copper-coated epoxy resin plate) may be arranged.
  • a Cover z. B. a copper-coated epoxy resin plate
  • This is in accordance with the basic idea of the invention, a self-contained unit to create, which is used as a finished module in a holder of a testing machine and can be connected in terms of data via a standardized interface.
  • the unit according to the invention is specifically for banknote recognition, in combination e.g. suitable with optical test units. After this The same principle can also be used for other test objects with a geometric magnetic Marking to be examined.
  • FIG. 1 shows a top view of a module 1 according to the invention. It is on a transport track 2 arranged, which runs here in the plane of the drawing and symbolized by two lines is. Its width is greater than the width B of the transport track 2.
  • Banknotes 3 are unreferenced on the transport track 2 at a relatively high speed promoted in transport direction 4. Unreferenced means that the lateral position with respect to the track boundaries is not fixed. A first banknote can therefore be more left and a subsequent second is located on the right on the transport track 2. It’s even possible that banknote 3 arrives with a slight inclination.
  • the banknote 3 is conveyed in the transverse direction, d. H. the long side of banknote 3 stands perpendicular to the direction of transport 4.
  • the Hall sensors 6.1. ..., 6, N the second row 8 are in the spaces between the Hall sensors 5.1, ..., 5.N of the first Row 7 set.
  • the resolution (viewed transversely to the direction of transport 4) can thus be several Lines are brought per centimeter.
  • the sensor arrangement described is one that extends over the entire width of the module 1 Small magnetizing gap 9 upstream. It is between the two pole pieces 10, 11 formed. It brings a saturating magnetic field into the transport path (and thus into the test object).
  • the magnetizing gap first pre-magnetizes the identifier 12 (which e.g. a number printed with magnetic ink has been reached). If the identifier 12 afterwards past the Hall sensors, these are activated. That means, those in the affected Hall sensors located in the area signal a magnetic field.
  • a clocked Activation of the sensors can additionally trigger a resolution in the transport direction from the bank note 3 and thus generate a magnetic pixel image. In principle, this can processed digitally like an optical image.
  • the pixel image can be based on the result of a (with an upstream in the Module derived) optical orientation can be used.
  • the magnetic identifier wherever it is on the test object and what dimensions it has, with the device according to the invention can be.
  • a carrier 13 which, for example, can be an integral part of the module housing can
  • a rod-shaped permanent magnet 14 is attached on the front side.
  • the longitudinal axis of the permanent magnet 14 is perpendicular to the plane of the drawing.
  • To the side of the permanent magnet 14 are the (magnetically conductive) pole shoes 10 and 11, which are where they connect to the transport path 2 border, form a magnetizing gap 9.
  • a shield 15 is provided laterally next to the pole piece 11 in the carrier 13. It is, for example, a partition made of a suitable material. It is vertical to transport track 2 (front of the module) and should be the stray field of the above Keep magnetizing agents away from the sensor part of module 1.
  • the sensor part is towards the transport path 2 through an epoxy resin plate 16 e.g. with copper coating 17 (spring bronze) completed as a cover.
  • the coated side of the Epoxy resin plate 16 and the front of the pole shoes 10,11 form a continuous smooth plane along which the banknote (driven by suitably arranged rollers) glides can.
  • On the back of the epoxy resin board 16 is a ceramic circuit board 19 attached. It carries the Hall sensors 5.1, 6.1 designed as chip elements.
  • the epoxy resin plate 16 is in the corresponding Provide area 18 with a recess (e.g. milling).
  • the ceramic printed circuit board 19 is on the front side of a printed circuit board via two angle pin strips 20, 21 22 attached for the sensor electronics. The latter is therefore perpendicular to the front of module 1.
  • the sensor electronics performs the processing (amplification, multiplexing) of the sensor signals so that they can be sent to a Evaluation unit (not shown) can be passed on.
  • the linear arrangement of the Hall sensors creates a magnetic field for each pixel proportional analog voltage.
  • the module 1 has a housing made of aluminum and is preferably with mounting elements or mechanical couplings, so that it can be easily gripped into one Banknote recognition machines can be installed.
  • the invention is not limited to the described embodiments. Basically although one or two rows of sensors are preferred, they can be used in special circumstances but also more (e.g. three) rows can be provided.
  • the sensor elements of the different Rows should be placed offset to each other in order to achieve the greatest possible resolution to reach.
  • Hall sensors instead of Hall sensors, other components can also be used. In each It is the case, however, that the distance between the sensors does not depend on a periodicity of a certain one Magnetic structure of the test object, but to the desired image resolution is aligned. Usually the sensors are placed as close to each other as possible.
  • the electronics can also be at least partially integrated on the magnetic field sensor chip his.
  • FIG. 2 allows a compact construction but in its nature not essential for the objective of the invention. In particular there is other options for designing the front end or for accommodation the sensor electronics.
  • the invention is a versatile and manufacturing technology has created advantageous unit to detect magnetic patterns and to consider.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
EP99810393A 1999-05-06 1999-05-06 Dispositif pour détecter un identificateur magnétique d'un objet à tester Withdrawn EP1050855A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP99810393A EP1050855A1 (fr) 1999-05-06 1999-05-06 Dispositif pour détecter un identificateur magnétique d'un objet à tester
PCT/CH2000/000206 WO2000068899A1 (fr) 1999-05-06 2000-04-10 Dispositif pour detecter un element d'identification magnetique d'un objet a controler
EP00914004A EP1181672A1 (fr) 1999-05-06 2000-04-10 Dispositif pour detecter un element d'identification magnetique d'un objet a controler
AU35483/00A AU3548300A (en) 1999-05-06 2000-04-10 Device for detecting a magnetic characteristic of a test object
TW089108729A TW446920B (en) 1999-05-06 2000-05-08 Device for detecting a magnetic sign of a test object and automatic bill identification machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99810393A EP1050855A1 (fr) 1999-05-06 1999-05-06 Dispositif pour détecter un identificateur magnétique d'un objet à tester

Publications (1)

Publication Number Publication Date
EP1050855A1 true EP1050855A1 (fr) 2000-11-08

Family

ID=8242812

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99810393A Withdrawn EP1050855A1 (fr) 1999-05-06 1999-05-06 Dispositif pour détecter un identificateur magnétique d'un objet à tester
EP00914004A Withdrawn EP1181672A1 (fr) 1999-05-06 2000-04-10 Dispositif pour detecter un element d'identification magnetique d'un objet a controler

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP00914004A Withdrawn EP1181672A1 (fr) 1999-05-06 2000-04-10 Dispositif pour detecter un element d'identification magnetique d'un objet a controler

Country Status (4)

Country Link
EP (2) EP1050855A1 (fr)
AU (1) AU3548300A (fr)
TW (1) TW446920B (fr)
WO (1) WO2000068899A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1221679A1 (fr) * 2001-01-08 2002-07-10 De La Rue International Limited Lecteur de fil de sécurité magnétique
FR2819610A1 (fr) * 2001-01-16 2002-07-19 Banque De France Procede de fabrication d'article securise
DE102010007586A1 (de) * 2010-02-10 2011-08-11 NGZ Geldzählmaschinengesellschaft mbH & Co. KG, 15827 Sensor für Geldzählmaschinen
CN103942872A (zh) * 2014-04-18 2014-07-23 江苏多维科技有限公司 一种低飞移高度面内磁性图像识别传感器芯片

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5348928B2 (ja) * 2008-04-16 2013-11-20 日本金銭機械株式会社 有価紙葉処理システム
CN111016494B (zh) * 2019-11-20 2021-01-26 中钞特种防伪科技有限公司 防伪元件及防伪产品

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536709A (en) * 1981-01-12 1985-08-20 Tokyo Shibaura Denki Kabushiki Kaisha Detecting device having spaced transmitting and receiving coils for detecting a metal strip embedded in paper money
DE3408086A1 (de) * 1984-02-14 1985-09-05 Sodeco-Saia AG, Genf/Genève Verfahren und einrichtung zum pruefen der echtheit von dokumenten
US4574190A (en) * 1981-12-21 1986-03-04 Omron Tateisi Electronics Co. Verifying system
EP0295229A2 (fr) * 1987-06-12 1988-12-14 DE LA RUE INTER INNOVATION Aktiebolag Dispositif pour l'examen de documents

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5358088A (en) 1992-11-25 1994-10-25 Mars Incorporated Horizontal magnetoresistive head apparatus and method for detecting magnetic data
US5418458A (en) 1993-08-31 1995-05-23 Eastman Kodak Company Apparatus and method for authentication of documents printed with magnetic ink
EP0772046B1 (fr) 1995-10-30 2002-04-17 Sentron Ag Sonde de champs magnétique et sonde de courant ou d'énergie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536709A (en) * 1981-01-12 1985-08-20 Tokyo Shibaura Denki Kabushiki Kaisha Detecting device having spaced transmitting and receiving coils for detecting a metal strip embedded in paper money
US4574190A (en) * 1981-12-21 1986-03-04 Omron Tateisi Electronics Co. Verifying system
DE3408086A1 (de) * 1984-02-14 1985-09-05 Sodeco-Saia AG, Genf/Genève Verfahren und einrichtung zum pruefen der echtheit von dokumenten
EP0295229A2 (fr) * 1987-06-12 1988-12-14 DE LA RUE INTER INNOVATION Aktiebolag Dispositif pour l'examen de documents

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1221679A1 (fr) * 2001-01-08 2002-07-10 De La Rue International Limited Lecteur de fil de sécurité magnétique
WO2002059841A1 (fr) * 2001-01-08 2002-08-01 De La Rue International Limited Lecteur de filetage magnetique
US7063257B2 (en) 2001-01-08 2006-06-20 De La Rue International Limited Magnetic thread reader
CN1294543C (zh) * 2001-01-08 2007-01-10 德拉鲁国际公司 磁线读出器和磁线检测方法
US7434732B2 (en) 2001-01-08 2008-10-14 De La Rue International Limited Magnetic thread reader
US7516893B2 (en) 2001-01-08 2009-04-14 De La Rue International, Ltd. Apparatus for and method of detecting a coded magnetic thread
FR2819610A1 (fr) * 2001-01-16 2002-07-19 Banque De France Procede de fabrication d'article securise
DE102010007586A1 (de) * 2010-02-10 2011-08-11 NGZ Geldzählmaschinengesellschaft mbH & Co. KG, 15827 Sensor für Geldzählmaschinen
CN103942872A (zh) * 2014-04-18 2014-07-23 江苏多维科技有限公司 一种低飞移高度面内磁性图像识别传感器芯片
CN103942872B (zh) * 2014-04-18 2016-08-24 江苏多维科技有限公司 一种低飞移高度面内磁性图像识别传感器芯片

Also Published As

Publication number Publication date
TW446920B (en) 2001-07-21
WO2000068899A1 (fr) 2000-11-16
AU3548300A (en) 2000-11-21
EP1181672A1 (fr) 2002-02-27

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