EP0219574A2 - Verfahren zum Identifizieren von Münzen - Google Patents

Verfahren zum Identifizieren von Münzen Download PDF

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Publication number
EP0219574A2
EP0219574A2 EP85116387A EP85116387A EP0219574A2 EP 0219574 A2 EP0219574 A2 EP 0219574A2 EP 85116387 A EP85116387 A EP 85116387A EP 85116387 A EP85116387 A EP 85116387A EP 0219574 A2 EP0219574 A2 EP 0219574A2
Authority
EP
European Patent Office
Prior art keywords
coin
coins
impact
frequencies
signal
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Withdrawn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
EP85116387A
Other languages
English (en)
French (fr)
Other versions
EP0219574A3 (de
Inventor
Juan Antonio Martinez Ayuso
Luis Carlos Fernandez Gonzales
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.)
Telefonica SA
Original Assignee
Telefonica de Espana SA
Telefonica Nacional de Espana SA
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 Telefonica de Espana SA, Telefonica Nacional de Espana SA filed Critical Telefonica de Espana SA
Publication of EP0219574A2 publication Critical patent/EP0219574A2/de
Publication of EP0219574A3 publication Critical patent/EP0219574A3/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • This invention refers to a method for the identification of coins, which is based on the ana­lysis of the frequency spectrum of the acoustical signals produced by the vibration of the coin due to its collision with a surface.
  • a further object of the invention is to develop an apparatus for the identification of coins, through the application of the above-mentioned method.
  • the method according to the invention is based on the proved fact of the existence of groups of frequencies characteristic of each one of the coins having legal tender in a country. It is statisticallyly demonstrated the repeatability of said frequencies between coins of the same value. These groups of frequencies are clearly different between different coins, being further to note that the areas employ­ed for the identification do not present any mask­ing effect, considering further the existence of margins of variation.
  • the character­ization of the coin is effected considering it as a system subjected to an excitation corresponding to the delta function, considering subsequently its re­sponse, by which to said coin a mechanical excita­tion is applied producing a wave of acoustical pres­sure, characteristic of each kind of coin, and al­lowing to identify the kind of coin that has pro­duced the same.
  • Said mechanical excitation is obtained by means of a collision having a predetermined intensity produced by the impact of the coin against a surfa­ce.
  • the coin can be allowed to freely fall upon a surface, according to a path having prefixed height and direction.
  • Said electronic sys­tem consists of a microphone, whose output electri­cal signal will be amplified and filtered in order to be subsequently inspected according to the Fourier transform by means of a processor, which enables to establish directly and in a very quick way the am­plitude of the frequency components of the signal, so as to be able to obtain an estimate of the fre­quencies forming the acoustical response of each of the coins.
  • the identification of the coin is obtain­ed through the comparison with a frequency standard. Furthermore, the identification of the coin is com­pleted with the measurement of its diameter by means, for example, of emitter and receiver diodes forming a discrete barrier of infrared light which during the lack of passage of coins activates all the re­ceiver diodes, while during the passage of the coins intercepts the luminous flux between a fixed number of pairs of diodes, so that from the number and the position of these deactivated diodes the required diameter is obtained. It is to be understood that other measurement systems of the diameter of the coin can be used.
  • the apparatus for the achievement of the method described comprises a way or circuit for the receipt of the coins, which defines a free fall path for said coin.
  • This way or circuit attains an impact surface, against which the coin strikes, pro­ducing the corresponding sound.
  • the receipt way or circuit for the coins is provided with a device for the measurement of the diameter of said coins.
  • This way or circuit can be formed by a conduit having an appropriate cross-section, which drives the coin upon the impact surface.
  • the apparatus further comprises a micro­ phone to collect the sound produced by the impact of the coin against the impact surface and transform it into an electrical signal.
  • the apparatus is completed by an ampli­fier of the electrical signal, a frequency selector filter and a processor of the signals.
  • Said filter can be a high-pass filter which eliminates the low frequencies.
  • the electrical signal is subjected to an analysis, by means of the Fourier transform, and compared with the frequency standards of the coins having legal tender corre­sponding to the diameter detected in the way or circuit of receipt of the coins.
  • the free fall path of the coins will have a height and a direction predetermined in order to attain an impact against the impact surface having a prefixed value.
  • an analog-to-digital converter can be placed, which encodes the electrical signals pro­vided by the microphone in numerical values.
  • the apparatus to actuate the above-de­scribed method, as illustrated in figure 4, com severelyprises a system for the collection of the coins 1, that can be a tube having an appropriate cross-­section, which leads them on an impact surface 2, upon which they fall from prefixed height and direc­tion.
  • the sound produced by the impact of the coin on the impact surface 2 is collected by the micro­phone 3 and amplified by the amplifier 4.
  • the electrical signal, into which said sound has been transformed, is filtered through a high­pass filter 5, that eliminates the low frequencies which could disturb the signal.
  • the signal passes to an analog-to-digital converter 6, that encodes the signal in numerical values, arriving to a signal processor 7 which o­perates a Fourier analysis and compares the fre­quencies of the analysed signal with the standards for the identification of the coins having legal tender of the corresponding country.
  • a signal processor 7 which o­perates a Fourier analysis and compares the fre­quencies of the analysed signal with the standards for the identification of the coins having legal tender of the corresponding country.
  • the diameter of the admitted coin is measured by means of an optical barrier 9, through which the result of the identification is presented in the display system 8 as discarded or accepted coin.
  • any limit of frequencies defining an area can be used.
  • an impact surface having any shape, nature and position, being possible as well to change the nature and the type of the filter, converter, processor of the sig­nal, measuring device of the coin diameter, kind of the frequency analysis employed, etc.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
EP85116387A 1985-10-16 1985-12-20 Verfahren zum Identifizieren von Münzen Withdrawn EP0219574A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES547918 1985-10-16
ES547918A ES8703205A1 (es) 1985-10-16 1985-10-16 Procedimiento y aparato para la identificacion de monedas

Publications (2)

Publication Number Publication Date
EP0219574A2 true EP0219574A2 (de) 1987-04-29
EP0219574A3 EP0219574A3 (de) 1988-01-13

Family

ID=8489961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85116387A Withdrawn EP0219574A3 (de) 1985-10-16 1985-12-20 Verfahren zum Identifizieren von Münzen

Country Status (2)

Country Link
EP (1) EP0219574A3 (de)
ES (1) ES8703205A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0323396A1 (de) * 1987-12-31 1989-07-05 Automaten Ag Verfahren zur elektronischen Münzprüfung und Münzprüfer zur Durchführung des Verfahrens
GB2215505A (en) * 1987-11-24 1989-09-20 Plessey Telecomm Coin validation apparatus
EP0356582A1 (de) * 1988-08-05 1990-03-07 THE GENERAL ELECTRIC COMPANY, p.l.c. Gegenstandsidentifizierung
GB2222903A (en) * 1988-09-20 1990-03-21 Plessey Telecomm Coin validation apparatus
US5316119A (en) * 1991-03-27 1994-05-31 Nippon Conlux Co., Ltd. Method and apparatus for discriminating between true and false coins or the like
EP0653731A3 (de) * 1993-11-04 1996-02-28 Nippon Conlux Co Ltd Verfahren und Vorrichtung zum Sortieren von Münzen.
GB2339316A (en) * 1998-07-09 2000-01-19 Mars Inc Coin validators
EP1628267A2 (de) 2004-08-06 2006-02-22 National Rejectors, Inc. GmbH Verfahren zur Prüfung von Münzen auf Echtheit in einem Münzgerät

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2036462B1 (es) * 1991-07-30 1993-12-16 Azkoyen Ind Sa Procedimiento para la identificacion de monedas.
ES2108643B1 (es) * 1995-09-28 1998-07-01 Azkoyen Ind Sa Procedimiento de identificacion de monedas.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3147839A (en) * 1959-03-09 1964-09-08 Electronic Coin Proc Corp Coin testing and sorting machine
DE2005038B2 (de) * 1970-01-31 1972-12-14 Muenzpruefer mit amboss
DE2017390C3 (de) * 1970-04-11 1975-11-13 Mako Apparatebau Fritz Brede, 6050 Offenbach Verfahren und Vorrichtung zum Prüfen von Münzen
GB1293975A (en) * 1970-07-27 1972-10-25 Ticket Equipment Ltd Improvements in or relating to coin handling mechanism
US3939953A (en) * 1973-06-20 1976-02-24 Mitani Shoji Kabushiki Kaisha Coin discriminating apparatus
CH591126A5 (en) * 1975-02-25 1977-09-15 Ret Sa Coin selector using coin mechanical resonance - combines resonant frequency with reference to produce difference signal for identification using bandpass filter
FR2359468A2 (fr) * 1976-07-23 1978-02-17 Crouzet Sa Nouveau selecteur de pieces de monnaie pour distributeurs automatiques
CH656240A5 (en) * 1984-05-04 1986-06-13 Claude Eric Jaquet Method of recognising the value of a coin and electronic device for implementing it

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215505A (en) * 1987-11-24 1989-09-20 Plessey Telecomm Coin validation apparatus
EP0318229A3 (de) * 1987-11-24 1990-08-08 Gec Plessey Telecommunications Limited Vorrichtung zum Prüfen von Münzen
US4989715A (en) * 1987-12-31 1991-02-05 Grunig Administration Method and device for detecting coins
EP0323396A1 (de) * 1987-12-31 1989-07-05 Automaten Ag Verfahren zur elektronischen Münzprüfung und Münzprüfer zur Durchführung des Verfahrens
EP0356582A1 (de) * 1988-08-05 1990-03-07 THE GENERAL ELECTRIC COMPANY, p.l.c. Gegenstandsidentifizierung
AU617528B2 (en) * 1988-09-20 1991-11-28 Gpt Limited Coin validation apparatus
GB2222903A (en) * 1988-09-20 1990-03-21 Plessey Telecomm Coin validation apparatus
US5316119A (en) * 1991-03-27 1994-05-31 Nippon Conlux Co., Ltd. Method and apparatus for discriminating between true and false coins or the like
EP0653731A3 (de) * 1993-11-04 1996-02-28 Nippon Conlux Co Ltd Verfahren und Vorrichtung zum Sortieren von Münzen.
AU678857B2 (en) * 1993-11-04 1997-06-12 Nippon Conlux Co., Ltd. Coin sorting method and apparatus therefor
GB2339316A (en) * 1998-07-09 2000-01-19 Mars Inc Coin validators
EP1628267A2 (de) 2004-08-06 2006-02-22 National Rejectors, Inc. GmbH Verfahren zur Prüfung von Münzen auf Echtheit in einem Münzgerät
DE102004038153A1 (de) * 2004-08-06 2006-02-23 National Rejectors, Inc. Gmbh Verfahren zur Prüfung von Münzen auf Echtheit in einem Münzgerät
EP1628267A3 (de) * 2004-08-06 2006-05-03 National Rejectors, Inc. GmbH Verfahren zur Prüfung von Münzen auf Echtheit in einem Münzgerät
DE102004038153B4 (de) * 2004-08-06 2006-05-11 National Rejectors, Inc. Gmbh Verfahren zur Prüfung von Münzen auf Echtheit in einem Münzgerät

Also Published As

Publication number Publication date
ES547918A0 (es) 1987-02-16
EP0219574A3 (de) 1988-01-13
ES8703205A1 (es) 1987-02-16

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Inventor name: MARTINEZ AYUSO, JUAN ANTONIO

Inventor name: FERNANDEZ GONZALES, LUIS CARLOS