EP0886247A2 - Méthode et circuit pour l'examèn de pièces de monnaie - Google Patents

Méthode et circuit pour l'examèn de pièces de monnaie Download PDF

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Publication number
EP0886247A2
EP0886247A2 EP98100090A EP98100090A EP0886247A2 EP 0886247 A2 EP0886247 A2 EP 0886247A2 EP 98100090 A EP98100090 A EP 98100090A EP 98100090 A EP98100090 A EP 98100090A EP 0886247 A2 EP0886247 A2 EP 0886247A2
Authority
EP
European Patent Office
Prior art keywords
signal
secondary coil
coin
switching steps
coil
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
EP98100090A
Other languages
German (de)
English (en)
Other versions
EP0886247B1 (fr
EP0886247A3 (fr
Inventor
Hans-Ulrich Cohrs
Wilfried 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 EP0886247A2 publication Critical patent/EP0886247A2/fr
Publication of EP0886247A3 publication Critical patent/EP0886247A3/fr
Application granted granted Critical
Publication of EP0886247B1 publication Critical patent/EP0886247B1/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
    • 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
    • G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation

Definitions

  • the invention relates to a method for testing of coins according to the preamble of claim 1.
  • a typical inductive sensor consists of a primary coil and a secondary coil, by their Magnetic field the coins pass through.
  • the coin finds an attenuation of the primary signal instead of.
  • the damping also depends on the selected one Frequency of the primary signal.
  • a so-called skin effect takes place, and the attenuation caused by such a signal leaves a statement about the surface condition of a Coin too.
  • the field penetrates further at low frequencies into the coin so that a statement can be made can about the type of material inside the coin, however also about their thickness.
  • a plurality of coils or Probe arrangements require a corresponding one Space in the coin validator, which is often not available.
  • the primary coil is also known from EP 0 336 018 to feed a probe arrangement with a transmission signal, that contains even or odd harmonics.
  • the secondary coil arrangement consists of a plurality of secondary coils to which frequency filters are assigned are. As a result, output signals appearing simultaneously received different frequency. So that's it possible to make a more precise statement about the nature of the to receive coins to be checked. However, the disadvantage is that a plurality of secondary coils are required which in turn need space and also one cause corresponding effort. Finally results by splitting the transmission signal into the different ones Frequency components a deterioration of the measurement result in terms of its level.
  • the invention has for its object a method to test coins to indicate the satisfactory measurement results has the consequence without the mechanical and Space requirements are important.
  • the procedure is the frequency of the transmission signal to be chosen so that in the time a coin takes to pass between the primary and secondary coils, generates a large number of periods as a transmission signal becomes.
  • the evaluable time is 60 ms or more. Therefore can also be used for this relatively short period of time Frequency of the primary signal a variety of measured values determine per time step.
  • the envelopes obtained in this way are characteristic for the nature of a coin and can be in be evaluated accordingly. For example the ratio of the amplitudes of the envelopes characteristic measure. Surface integrals of the envelopes are formed, which then with corresponding Setpoints are compared. Furthermore, the Quotients can be determined from two or more envelopes. This type of evaluation is possible because all measuring or Envelopes occur absolutely simultaneously.
  • the number and / or the position of the switching steps can be changed are, and that according to the respective continuous Coin, whereby the first pass phase serves to make a rough determination (e.g. ferromagnetic - not magnetic), in order, if necessary, after a corresponding change in to carry out a fine determination in the second phase.
  • a rough determination e.g. ferromagnetic - not magnetic
  • upstream measuring systems with their signal specify the type of switching steps with which a measurement is carried out should be done. In both cases the changeover takes place or Change takes place without delay because neither the transmit signal still the received signal is changed.
  • Diameter of the probe can be chosen to be relatively small, which is particularly favorable for the testing of bicolor coins is.
  • the measurement statement is not dependent on the invention on the size of the inductance.
  • a circuit arrangement for performing the invention Procedural provides for a clock that one Controls curve generator.
  • the curve generator creates that Primary or transmit signal given to the primary coil becomes.
  • a frequency divider is used to subdivide the Clock signal in a number of switching steps.
  • the frequency divider is therefore with a signal processing unit connected which is the output signal of the secondary coil repeatedly assigned to the switching steps Envelope formation as described above. The way in which the envelopes are evaluated is ultimately depends on which method is the best Results.
  • the signal processing unit can, for example, be a Sample & hold circuit be from a multiplexer is controlled, which acts as a switch for the purpose of assignment of the measured values of the secondary or measurement signal to the individual switching steps.
  • a so-called Processor used in the described Digital signal processing controls both the primary and secondary coils, i.e. generates the input signal of the desired Waveform and processes the received signal from the secondary coil.
  • the invention there is a maximum number of disturbing parameters switched off, which otherwise encountered with increased effort had to become. It does not need a resonant circuit that naturally at least one capacitor in addition to the coil and contains a resistor. Affect these components as is known, the measured values. They also increase the settling time for the sensor system.
  • the invention needs only one coil and an independently programmable signal generator, which is already part of an inserted Microprocessor.
  • the primary coil denoted by 12 and the secondary coil by 14. Between the coils 12, 14, a coin 16 is indicated.
  • the Square wave voltage is generated in the waveform generator 18, which is controlled by a clock 20.
  • the clock 20 determines the frequency and the encoder 18 the shape of the voltage signal given to the primary coil 12 becomes.
  • a frequency divider stage 22 divides the clock signal into a series of steps, for example eight, as shown in Fig. 1 shown.
  • the frequency divider stage 22 is one Multiplexer 24 connected.
  • the multiplexer 24 therefore switches the output or secondary or measurement signal in time the timer steps t1 to t8 through to a sample & Hold circuit 26.
  • This is with an analog-to-digital converter connected.
  • the measured values each are assigned to a time switch step, to a curve shaped, which in turn is converted into digital using the A / D converter Signals can be converted.
  • Figures 3 and 4 two examples of such curve shapes are shown.
  • Fig. 3 shows the envelopes for a 2 DM coin, which is known to consist of 75% copper and 25% nickel, the core is made of nickel.
  • the timing steps 1 eight envelopes are generated, that occur at the same time and differ from each other Mark history.
  • the envelopes show that there is a different damping depending on which section of a period or half a period of the transmission signal is considered.
  • the envelopes enable a variety of evaluation options, like evaluation of the absolute amplitudes, Comparison of individual amplitudes of the envelopes with each other, surface integrals of the individual envelopes or combination of individual surface integrals, quotients from two or more measurement curves and the like.
  • the the respective underlying criteria are accompanied by corresponding reference values stored in the coin validator are compared to form an acceptance or return signal in known way.
  • Fig. 4 shows a number of measurement or envelope curves for one so-called bicolor coin, the core of which is made of a different material exists as the ring arranged around the core.
  • an evaluation can be carried out like that was indicated above.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
EP98100090A 1997-06-21 1998-01-07 Méthode et circuit pour l'examen de pièces de monnaie Expired - Lifetime EP0886247B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19726449A DE19726449C2 (de) 1997-06-21 1997-06-21 Verfahren und Schaltungsanordnung zur Prüfung von Münzen
DE19726449 1997-06-21

Publications (3)

Publication Number Publication Date
EP0886247A2 true EP0886247A2 (fr) 1998-12-23
EP0886247A3 EP0886247A3 (fr) 1999-12-01
EP0886247B1 EP0886247B1 (fr) 2003-05-28

Family

ID=7833282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100090A Expired - Lifetime EP0886247B1 (fr) 1997-06-21 1998-01-07 Méthode et circuit pour l'examen de pièces de monnaie

Country Status (3)

Country Link
EP (1) EP0886247B1 (fr)
DE (2) DE19726449C2 (fr)
ES (1) ES2196399T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1104920A1 (fr) * 1999-12-02 2001-06-06 Glory Kogyo Kabushiki Kaisha Méthode et dispositif pour identifier une pièce de monnaie
EP1233380A2 (fr) * 2001-02-14 2002-08-21 National Rejectors, Inc. GmbH Méthode pour détecter l'activation d'un mécanisme de retour de pièces dans un système d'examen de pièces
EP1286313A2 (fr) * 2001-08-16 2003-02-26 National Rejectors, Inc. GmbH Procédé et appareil pour mesurer des diamètres de pièces de monnaie
EP1330793B1 (fr) * 2000-09-05 2008-12-10 Talaris Inc. Procedes et appareil destine a determiner le type de pieces et a detecter d'autres parametres
EP2040227A2 (fr) 2007-09-20 2009-03-25 National Rejectors, Inc. GmbH Procédé de vérification de pièces de monnaie

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19836490C2 (de) 1998-08-12 2002-06-20 Nat Rejectors Gmbh Schaltungsanordnung für die Prüfung von Münzen in einem Münzgerät
DE20216785U1 (de) * 2002-10-31 2003-01-09 National Rejectors, Inc. Gmbh, 21614 Buxtehude Spulenanordnung für Münzprüfer
DE102004013286B4 (de) * 2004-03-18 2006-04-13 National Rejectors, Inc. Gmbh Vorrichtung zum Prüfen von Münzen
DE102004020159A1 (de) * 2004-04-24 2005-11-17 National Rejectors, Inc. Gmbh Verfahren zum Prüfen von Münzen
EP3287991B1 (fr) 2017-07-11 2019-07-24 Azkoyen, S.A. Détecteur de pièces de monnaie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336018A2 (fr) 1988-03-31 1989-10-11 Nippon Conlux Co., Ltd. Méthode et dispositif de tri de pièces de monnaie

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES8607594A1 (es) * 1983-12-06 1986-05-16 Mars Inc Un dispositivo de comunicacion con una ficha de almacenamiento de datos
GB2266400B (en) * 1991-09-28 1995-11-22 Anritsu Corp Coin discriminating apparatus
DE4339543C2 (de) * 1993-11-19 1998-07-23 Nat Rejectors Gmbh Verfahren zur Prüfung von Münzen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336018A2 (fr) 1988-03-31 1989-10-11 Nippon Conlux Co., Ltd. Méthode et dispositif de tri de pièces de monnaie

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1104920A1 (fr) * 1999-12-02 2001-06-06 Glory Kogyo Kabushiki Kaisha Méthode et dispositif pour identifier une pièce de monnaie
EP1330793B1 (fr) * 2000-09-05 2008-12-10 Talaris Inc. Procedes et appareil destine a determiner le type de pieces et a detecter d'autres parametres
EP1233380A2 (fr) * 2001-02-14 2002-08-21 National Rejectors, Inc. GmbH Méthode pour détecter l'activation d'un mécanisme de retour de pièces dans un système d'examen de pièces
EP1233380A3 (fr) * 2001-02-14 2005-09-14 National Rejectors, Inc. GmbH Méthode pour détecter l'activation d'un mécanisme de retour de pièces dans un système d'examen de pièces
EP1286313A2 (fr) * 2001-08-16 2003-02-26 National Rejectors, Inc. GmbH Procédé et appareil pour mesurer des diamètres de pièces de monnaie
EP1286313A3 (fr) * 2001-08-16 2004-05-06 National Rejectors, Inc. GmbH Procédé et appareil pour mesurer des diamètres de pièces de monnaie
EP2040227A2 (fr) 2007-09-20 2009-03-25 National Rejectors, Inc. GmbH Procédé de vérification de pièces de monnaie
EP2040227A3 (fr) * 2007-09-20 2010-01-13 National Rejectors, Inc. GmbH Procédé de vérification de pièces de monnaie

Also Published As

Publication number Publication date
DE59808510D1 (de) 2003-07-03
EP0886247B1 (fr) 2003-05-28
DE19726449C2 (de) 1999-04-15
EP0886247A3 (fr) 1999-12-01
ES2196399T3 (es) 2003-12-16
DE19726449A1 (de) 1999-01-07

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