EP1577844B1 - Dispositif d'examen de pièces de monnaie - Google Patents

Dispositif d'examen de pièces de monnaie Download PDF

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Publication number
EP1577844B1
EP1577844B1 EP05005082A EP05005082A EP1577844B1 EP 1577844 B1 EP1577844 B1 EP 1577844B1 EP 05005082 A EP05005082 A EP 05005082A EP 05005082 A EP05005082 A EP 05005082A EP 1577844 B1 EP1577844 B1 EP 1577844B1
Authority
EP
European Patent Office
Prior art keywords
coil
coin
receiving coil
ferrite core
coins
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.)
Expired - Lifetime
Application number
EP05005082A
Other languages
German (de)
English (en)
Other versions
EP1577844A3 (fr
EP1577844A2 (fr
Inventor
Ulrich Dipl.-Ing. Cohrs
Wilfried Dipl.-Ing. Meyer
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.)
Crane Payment Innovations GmbH
Original Assignee
National Rejectors Inc 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 National Rejectors Inc GmbH filed Critical National Rejectors Inc GmbH
Publication of EP1577844A2 publication Critical patent/EP1577844A2/fr
Publication of EP1577844A3 publication Critical patent/EP1577844A3/fr
Application granted granted Critical
Publication of EP1577844B1 publication Critical patent/EP1577844B1/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
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/08—Testing the magnetic or electric properties

Definitions

  • the invention relates to a device for testing coins with an inductively operating sensor arrangement according to claim 1.
  • Inductive measuring arrangements for coin validators usually use a transmitting coil and on the opposite side of the coin path a receiver coil. As the coin passes through the magnetic field, the receiving coil is attenuated. Since the magnetic field must penetrate the entire coin, it is not possible to detect inhomogeneities in the material depth of the coin. For example, for a given coin, the magnetic moment may be determined but not whether the magnetic layer is at the surface or in the center of the coin. A similar problem arises with plated coins. Since only a total loss is measured, it can not be determined whether it is homogeneous material or plated coins.
  • the invention has for its object to provide a device for testing coins, with the measurement at a sufficiently high resolution across the thickness of the coin is made possible without that distance fluctuations of the coin have a particularly adverse effect.
  • the invention provides the arrangement of the receiver coil on the same side as the transmitter coil, wherein the cross section of the preferably smaller receiver coil is flooded by a homogeneous magnetic field portion of the transmitter coil traversed by the coin.
  • receive and transmit coil are arranged on the same side.
  • a relatively good insensitivity against uneven running of the coins is achieved in that the receiving coil is flooded substantially by a homogeneous field of the transmitting coil. It is therefore necessary to choose a coil arrangement with which this requirement is met.
  • the magnetic field in the center of the coil emerges or is approximately perpendicular to the core and the magnetic field lines curve only at a relatively great distance from the surface of the core.
  • An inventive arrangement for testing coins provides for the arrangement of a transmitting coil on a ferrite core whose length is greater than the length of the coil.
  • the receiving coil has a smaller diameter and is coaxially arranged on one side of the ferrite core such that it is flooded by a homogeneous field of the transmitting coil.
  • the receiving coil is seated in an end-side annular recess of the core, in particular of the ferrite core.
  • a further receiving coil is arranged on the opposite side of the coin track, which is flooded by the magnetic field of the transmitting coil, which penetrates the coin.
  • FIG. 1 Three examples of the cross section of coins are indicated. Under 1. a plated or galvanized coin is shown, that is provided on both sides with a layer. In the middle example, a homogeneous coin is indicated, the z. B. brass, iron or a Kupfernickellegtechnik. In the lower example, a so-called layer coin is shown with a nickel core and outer Layers of copper / nickel alloy. With the help of the invention such coins are to be discriminated.
  • a ferrite core 10 is shown in section, on the outside of a transmitting coil 12 is applied.
  • the length of the ferrite core 10 is significantly larger than that of the transmitting coil 12, that is, almost four times the coil length.
  • the transmitting coil 12 is arranged at a distance from the ends of the ferrite core 10.
  • a receiving coil 16 is arranged in an annular recess 14 at one end of the ferrite core 10. It is coaxial with the transmitting coil 12, but has a much smaller inner and outer diameter than the transmitting coil 12.
  • a plane is indicated, in which normally moves a coin in a Münzprüfer along. The annular recess is thus facing the plane 18.
  • the running direction of the coins is approximately in the direction of arrow 20.
  • the magnetic field lines generated by the transmitting coil 12 are shown in dashed lines. In the region of the receiving coil 16, the magnetic field is largely homogeneous. Consequently, the magnetic field flowing through the receiving coil 16 and acting on the coin in the measuring plane 18 is largely homogeneous. A divergence of the magnetic lines, as indicated at 22, takes place at a greater distance from the coil assembly.
  • the method for testing coins with the coil assembly according to FIG. 2 should not be described. It can take place after procedures, as in DE 197 26 449 described.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Noodles (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)

Claims (2)

  1. Dispositif d'examen de pièces de monnaie avec un arrangement de senseur inductif qui présente une bobine d'émission et une bobine de réception (12, 16) dont les champs sont traversés par une pièce de monnaie et dans lequel la bobine d'émission (12) est alimentée par un signal d'émission et un signal de sortie de la bobine de réception (16) est donné à un dispositif d'analyse qui analyse le signal de sortie afin de générer un signal d'acceptation ou de refus, la bobine d'émission (12) étant disposée sur le côté extérieur d' un tore de ferrite (10) et la bobine de réception dans un creux sur le front dudit tore de ferrite (10) qui est vis-à vis du conduit de monnaie (18), la bobine de réception (16) étant pénétrée d'un champ magnétique et le tore de ferrite ayant une longueur évidemment plus grande que la bobine de réception (12) et le diamètre de la bobine de réception (16) étant seulement une fraction du diamètre de la pièce de monnaie à examiner, caractérisé en ce que le tore de ferrite (10) a un diamètre et la bobine de réception (16) est disposée dans un creux coaxial annulaire du tore de ferrite (10).
  2. Dispositif selon la revendication 1, caractérisé en ce que une autre bobine de réception est disposée sur le côté vis-à-vis du conduit de monnaie (10) et qui est pénétrée par les champs magnétique de la bobine de réception (12) qui pénètre la pièce de monnaie.
EP05005082A 2004-03-18 2005-03-09 Dispositif d'examen de pièces de monnaie Expired - Lifetime EP1577844B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004013286 2004-03-18
DE102004013286A DE102004013286B4 (de) 2004-03-18 2004-03-18 Vorrichtung zum Prüfen von Münzen

Publications (3)

Publication Number Publication Date
EP1577844A2 EP1577844A2 (fr) 2005-09-21
EP1577844A3 EP1577844A3 (fr) 2005-12-14
EP1577844B1 true EP1577844B1 (fr) 2011-04-20

Family

ID=34833169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05005082A Expired - Lifetime EP1577844B1 (fr) 2004-03-18 2005-03-09 Dispositif d'examen de pièces de monnaie

Country Status (4)

Country Link
EP (1) EP1577844B1 (fr)
AT (1) ATE506665T1 (fr)
DE (2) DE102004013286B4 (fr)
ES (1) ES2361184T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007046390B3 (de) * 2007-09-20 2008-11-27 National Rejectors, Inc. Gmbh Verfahren zum Prüfen von Münzen
DE102009003993A1 (de) 2009-01-07 2010-07-08 National Rejectors, Inc. Gmbh Induktive Messordnung für Freifall-Münzgeräte

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3764897A (en) * 1971-12-28 1973-10-09 Singer Co Electromagnetic thickness gauging using a transmitting coil shaped to provide a constant field over a range of measuring distances
FR2305809A1 (fr) * 1975-03-25 1976-10-22 Crouzet Sa Dispositif d'authentification de titres monetaires
US5263566A (en) * 1991-04-10 1993-11-23 Matsushita Electric Industrial Co., Ltd. Coin discriminating apparatus
WO1993007589A1 (fr) * 1991-09-28 1993-04-15 Anritsu Corporation Dispositif pour le triage des pieces de monnaie
DE4403969A1 (de) * 1994-02-04 1995-08-10 Angewandte Computer Technik Ac Vorrichtung zur Überprüfung von Münzen
US5630494A (en) * 1995-03-07 1997-05-20 Cummins-Allison Corp. Coin discrimination sensor and coin handling system
DE19726449C2 (de) * 1997-06-21 1999-04-15 Nat Rejectors Gmbh Verfahren und Schaltungsanordnung zur Prüfung von Münzen
ATE326044T1 (de) * 1999-12-02 2006-06-15 Glory Kogyo Kk Verfahren und vorrichtung zur münzidentifizierung
GB2393840A (en) * 2002-10-01 2004-04-07 Innovative Technology Ltd Coin validation by measuring reflected magnetic field non-homogeneity

Also Published As

Publication number Publication date
EP1577844A3 (fr) 2005-12-14
ATE506665T1 (de) 2011-05-15
DE102004013286A1 (de) 2005-11-10
DE102004013286B4 (de) 2006-04-13
DE502005011263D1 (de) 2011-06-01
ES2361184T3 (es) 2011-06-14
EP1577844A2 (fr) 2005-09-21

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