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EP0725374B1 - Contrôleur de pièces de monnaie avec dispositif pour vérifier la dureté - Google Patents

Contrôleur de pièces de monnaie avec dispositif pour vérifier la dureté Download PDF

Info

Publication number
EP0725374B1
EP0725374B1 EP95117912A EP95117912A EP0725374B1 EP 0725374 B1 EP0725374 B1 EP 0725374B1 EP 95117912 A EP95117912 A EP 95117912A EP 95117912 A EP95117912 A EP 95117912A EP 0725374 B1 EP0725374 B1 EP 0725374B1
Authority
EP
European Patent Office
Prior art keywords
coin
coins
sensor
evaluation electronics
coin acceptor
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
EP95117912A
Other languages
German (de)
English (en)
Other versions
EP0725374A3 (fr
EP0725374A2 (fr
Inventor
Hans-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 EP0725374A2 publication Critical patent/EP0725374A2/fr
Publication of EP0725374A3 publication Critical patent/EP0725374A3/fr
Application granted granted Critical
Publication of EP0725374B1 publication Critical patent/EP0725374B1/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
    • G07D5/06—Testing the hardness or elasticity

Definitions

  • the invention relates to a coin operated device Device for determining the hardness of coins according to the preamble of patent claim 1 or 2.
  • DE 41 38 018 describes a coin testing device for determining hardness of coins, in which a sensor a relatively hard stop surface in relation to the coin material having. With the help of evaluation electronics the period is determined and with a predetermined value compared that between the output signal of the sensor when the coin is struck and a rimpedement of the output signal is at the original value. The contact duration the coin with the stop surface of the sensor is used as a criterion for determining hardness. The period from the date the coin was struck at the sensor and the time of the coin jumping off is a reliable measure of coin hardness. This Period essentially depends on whether elastic or very soft materials for the coins, such as Lead is provided. The hardness of the stop surface must be large enough, at least larger than that of the material real coins, so that the generated and detected by the sensor Coin vibrations mostly from the coin hardness and depends to a small extent on other factors, like coin size, speed and sensor geometry.
  • a sensor Piezo crystal In the known device is either a sensor Piezo crystal or a contact pin is used.
  • the contact pin interacts with a high frequency foil that is arranged in the area of the coin track, so that a RF voltage generated by a high frequency generator the film can be capacitively coupled onto the coin.
  • the invention has for its object a coin device with a device for determining the hardness of the beginning to improve the type mentioned so that falsified coins made of soft material, more clearly differentiated from real coins can be.
  • the senor is resiliently arranged so that the first time a coin hits the stop surface follow further shocks.
  • the sensor bounces on a first one Touches the coin and strikes at one of the the sensor mass and the spring constant at least once, preferably several times on the coin.
  • the spring-sensor combination After has swung out for some time.
  • the improvement of the invention now consists in the fact that not only a single measured value is generated, but several, from which the actual measurement result, for example by averaging, can be calculated.
  • the evaluation electronics can, for example, the amplitudes determine the vibration generated by the individual impacts and with given values within a given Compare time interval. For example, there are three Amplitude values above a given level can do this speak for the authenticity of a coin. Alternatively or additionally can be the duration of an output signal from the sensor be measured between the striking of a coin on the sensor and the rimpedement of the output signal passed the original value. This time period lies with several successive processes within of a given range, this can be for a real one Apply coin. Alternatively, it can also be determined how many signals within a given time interval are above a certain amplitude accordingly the number of times the coin has struck the sensor. In the case of hard materials, the energy conversion is generally less than soft, so a large number of oscillation periods within a time interval is achieved.
  • Spring formed by a leaf spring, at the end of which Sensor can be arranged.
  • the spring can after a further embodiment of the invention at the same time as a ladder are used to connect the sensor to the evaluation electronics.
  • Stop surface is punctiform or linear.
  • the sensor can be on a Ground block must be arranged, which of course the vibration behavior co-determined by the spring. It is also conceivable that Omit the mass block and the only mass is the piezo sensor to leave.
  • a coin 1 is shown, which is a coin career 2 rolls down.
  • a sensor protrudes into the coin path 3 with a stop surface 4, which is a steel ball represents.
  • a piezoelectric one Element 5 arranged that fixed with the steel ball is connected and preferably on a counter block 6 made of steel.
  • the steel block 6 is one at the end Leaf spring 10 attached, attached to the device at 12 is. If the coin 1 hits the steel ball 4, arises on piezoelectric element 5 according to a voltage curve FIG. 3, which has a circuit arrangement 7 according to FIG. 2 and an operational amplifier 8 of evaluation electronics 9 is supplied.
  • Fig. 3 it can be seen that within a predetermined time interval t n three recurring, decreasing in amplitude vibrations occur. Each vibration represents the striking of the steel ball 4 on the coin 1. When struck for the first time, the impact causes the sensor arrangement to rebound. Since this is suspended from the spring 10, the steel ball 4 can lift off the coin running surface. After a certain time, the steel ball 4 approaches the coin again, this process being repeated. It depends on the hardness of the coin 1 and the hardness of the steel ball 4 as well as the spring behavior of the spring arrangement made of leaf spring 10 and the mass of the sensor, steel ball and steel block.
  • the period of the vibrations t 1 -t 0 ' t 1' -t 0 ' or t 1 " -t 0" is approximately the same, while the amplitude gradually decreases due to the inevitable vibration losses.
  • the amplitudes of all vibrations in the positive range are greater than level A.
  • Level A can be seen as a criterion for the authenticity of a coin. If the amplitudes are above level A in a predetermined time interval, authenticity is present. If they are below this, there is a false certificate.
  • a much softer material, such as lead or the like which can otherwise be geometrically and approximated by the weight of a real coin, exhibits a completely different impact behavior.
  • the number of vibrations per time interval t n can also be calculated. It is also possible to determine the number of vibrations per unit of time, which corresponds to the number of shocks per time interval. Although the amplitudes are smaller, they also last longer.
  • the time integral may like that of a real one Coin.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Claims (7)

  1. Appareil pour pièces de monnaie, équipé d'un dispositif de détermination de la dureté de pièces de monnaie, avec un capteur contenant un élément piezoélectrique, qui présente une surface de butée sur laquelle roule la pièce de monnaie, qui est relativement dure par rapport au matériau de la monnaie, qui fait saillie dans la trajectoire de déplacement de la pièce de monnaie et sur laquelle les pièces de monnaie viennent buter, et une électronique d'évaluation qui évalue le comportement vibratoire du piezoélément en se basant sur le choc produit avec les pièces de monnaie et effectue une comparaison avec des valeurs prédéterminées, caractérisé en ce que le capteur (3) est disposé élastiquement, de manière que, lors de la première arrivée d'une pièce de monnaie sur la surface de butée (4), d'autres chocs se produisent ensuite et que l'électronique d'évaluation (9) évalue les vibrations provoquées par le choc multiple, l'électronique d'évaluation comptant le nombre de chocs par unité de temps en le comparant à une valeur prédéterminée.
  2. Appareil pour pièces de monnaie équipé d'un dispositif de détermination de la dureté des pièces de monnaie, avec un capteur contenant un élément piezoélectrique, qui présente une surface de butée, sur laquelle roule la pièce, qui est relativement dure par rapport au matériau de la pièce de monnaie, qui fait saillie dans la trajectoire de déplacement des pièces de monnaie, et sur laquelle les pièces de monnaie viennent buter, et une électronique d'évaluation qui évalue le comportement vibratoire du piezoélément en se basant sur le choc produit avec les pièces de monnaie et effectue une comparaison avec des valeurs prédéterminées, caractérisé en ce que le capteur (3) est disposé élastiquement de manière que, lors de la première arrivée d'une pièce de monnaie sur la surface de butée (4), d'autres chocs se produisent ensuite et l'électronique d'évaluation (9) évalue les vibrations provoquées par le choc multiple, l'électronique d'évaluation comparant les amplitudes des différentes vibrations à une valeur prédéterminée et constatant si les amplitudes dépassent la valeur prédéterminée, dans les limites d'un intervalle de temps prédéterminé.
  3. Appareil pour pièces de monnaie selon les revendications 1 et 2, caractérisé en ce que le ressort (10) est un ressort à lame.
  4. Appareil pour pièces de monnaie selon la revendication 3, caractérisé en ce que le ressort à lame est réalisé sous la forme de carte à circuit imprimé pour assurer la liaison électrique entre le capteur et l'électronique d'évaluation.
  5. Appareil pour pièces de monnaie selon l'une des revendications 1 à 4, caractérisé en ce que la surface de butée (4) est de forme ponctuelle ou linéaire
  6. Appareil pour pièces de monnaie selon la revendication 3, caractérisé en ce que la surface de butée (4) est formée par une bille d'acier.
  7. Appareil pour pièces de monnaie selon les revendications 1 à 6, caractérisé en ce que le capteur (5) est disposé sur un bloc (6) présentant une masse.
EP95117912A 1995-02-04 1995-11-14 Contrôleur de pièces de monnaie avec dispositif pour vérifier la dureté Expired - Lifetime EP0725374B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19503765 1995-02-04
DE19503765A DE19503765C1 (de) 1995-02-04 1995-02-04 Münzgerät mit einer Vorrichtung zur Härtebestimmung von Münzen

Publications (3)

Publication Number Publication Date
EP0725374A2 EP0725374A2 (fr) 1996-08-07
EP0725374A3 EP0725374A3 (fr) 1998-05-20
EP0725374B1 true EP0725374B1 (fr) 2002-11-27

Family

ID=7753237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117912A Expired - Lifetime EP0725374B1 (fr) 1995-02-04 1995-11-14 Contrôleur de pièces de monnaie avec dispositif pour vérifier la dureté

Country Status (3)

Country Link
EP (1) EP0725374B1 (fr)
DE (2) DE19503765C1 (fr)
ES (1) ES2184781T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6138813A (en) * 1999-06-03 2000-10-31 Mars, Incorporated Coin mechanism with a piezoelectric film sensor
EP1378867A1 (fr) * 2002-07-02 2004-01-07 Azkoyen Medios de Pago, S.A. Procédé et dispositif pour vérifier des pièces de monnaie
EP1378866A3 (fr) * 2002-07-02 2004-04-21 Azkoyen Medios de Pago, S.A. Dispositif et procédé pour contrôler des pièces de monnaie
EP1383086A1 (fr) 2002-07-19 2004-01-21 Mars, Incorporated Validation de pièces de monnaie par traitement d'un signal
ES2420204B1 (es) * 2002-10-07 2015-03-17 Azkoyen, S.A. Dispositivo de verificación de monedas y selector de monedas
ES2344874B1 (es) * 2007-11-07 2011-06-28 Azkoyen Medios De Pago, S.A. Dispositivo y metodo de verificacion de monedas.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1001230A (fr) * 1946-03-29 1952-02-21 Perfectionnements apportés aux appareils de mesure à rebondissement, notamment à ceux pour la détermination de la dureté d'une pièce
US3425263A (en) * 1967-03-06 1969-02-04 Gen Electric Apparatus for measuring some mechanical properties of a material
DK327581A (da) * 1981-07-23 1983-01-24 Gnt Automatic As Fremgangsmaade til klasseficering af moenter i henhold til deres mekaniske elasticitet
DE4138018C1 (fr) * 1991-11-19 1992-11-05 National Rejectors Inc. Gmbh, 2150 Buxtehude, De

Also Published As

Publication number Publication date
EP0725374A3 (fr) 1998-05-20
DE59510476D1 (de) 2003-01-09
ES2184781T3 (es) 2003-04-16
DE19503765C1 (de) 1996-05-02
EP0725374A2 (fr) 1996-08-07

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