EP0818758B1 - Dispositif pour déterminer la validité de pièces de monnaie, jetons ou autres objets métalliques plats - Google Patents

Dispositif pour déterminer la validité de pièces de monnaie, jetons ou autres objets métalliques plats Download PDF

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Publication number
EP0818758B1
EP0818758B1 EP19970111430 EP97111430A EP0818758B1 EP 0818758 B1 EP0818758 B1 EP 0818758B1 EP 19970111430 EP19970111430 EP 19970111430 EP 97111430 A EP97111430 A EP 97111430A EP 0818758 B1 EP0818758 B1 EP 0818758B1
Authority
EP
European Patent Office
Prior art keywords
coin
moment
signal
inductive sensor
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
EP19970111430
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German (de)
English (en)
Other versions
EP0818758A3 (fr
EP0818758A2 (fr
Inventor
Philippe Vesin
Thomas Seitz
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.)
IPM INTERNATIONAL SA
Original Assignee
IPM International SA
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Filing date
Publication date
Application filed by IPM International SA filed Critical IPM International SA
Publication of EP0818758A2 publication Critical patent/EP0818758A2/fr
Publication of EP0818758A3 publication Critical patent/EP0818758A3/fr
Application granted granted Critical
Publication of EP0818758B1 publication Critical patent/EP0818758B1/fr
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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 device for checking the authenticity of coins, tokens or other flat metallic objects referred to in the preamble of claim 1 Art.
  • Such coin validators are suitable, for example, for the identification of coins in telephone sets, vending machines, counters for measuring energy, etc.
  • a device for checking the authenticity of coins, tokens or other flat metallic objects according to the preamble of claim 1 is known from US Pat. No. 4,509,633.
  • the device comprises light barriers for determining the chord length and an inductive sensor for measuring the alloy composition of the coins.
  • an inductive sensor is provided in the form of a coil which is disposed below the path of the coin channel and their magnetic field through the bottom of the Munzkanals through perpendicular to the on the Track rolling coin is directed so that the edge of the coin is magnetically captured. This solution requires an additional sensor.
  • the invention has for its object to provide a device for testing the authenticity of coins, tokens or other flat metallic objects, in which the aforementioned disadvantages are eliminated.
  • the detection of a new measured value of the inductive sensor which serves as a criterion for the acceptance or rejection of the coin, which can be used in addition to the existing criteria or instead of another criterion:
  • the signal of the inductive sensor is at one time detected at the edge of the rolling coin passes the sensitive zone of the inductive sensor.
  • the inductive sensor is located between two light barriers.
  • the inductive sensor signal is latched as a function of time as a series of measurements. From the time points marking the beginning and the end of the darkening of the light barriers, the chord length or the diameter of the coin is determined according to the laws of physical motion. Subsequently, the time at which the edge of the coin was in the center of the inductive sensor and the signal of the inductive sensor at this time from the stored measured values by interpolation is calculated. The measured value thus obtained serves as a criterion for acceptance or rejection of the coin.
  • the coin passes at least one before or after the inductive sensor in a suitably selected distance arranged light barrier and the output from the light barrier signal triggers the detection of the signal of the inductive sensor directly.
  • inductive sensor is arranged so that its sensitive zone is arranged approximately at the level of the bottom of the coin channel. The edge of the coins then always passes through the center and the coin's alloy composition can be measured in a known manner.
  • Fig. 1 shows a device for checking the authenticity of coins or tokens or other flat metallic objects, which will be referred to below as a coin.
  • the device has in a conventional manner a coin channel K, two light barriers L1 and L2, an inductive sensor S1 and electronic means E for detecting and evaluating the output from the light barriers L1 and L2 and the sensor S 1 electrical signals.
  • the sensor S1 is advantageously arranged between the two light barriers L 1 and L 2.
  • the Coin channel K for example, according to the teaching of European patent EP 710 935 designed and provided with energy-absorbing elements that a hopping or jumping of the coin M between the two light barriers L1 and L2 does not normally occur.
  • the coin M In the region between the two light barriers L1 and L2 of the coin channel K is formed as an inclined plane SE, which is inclined relative to the horizontal H by the angle ⁇ .
  • the coin M On the inclined plane SE between the two light barriers L1 and L2, the coin M now moves downwards at a constant acceleration, which occurs as a result of the gravitational force and frictional forces.
  • the movement may be non-gliding, gliding without rollers or a combination of rollers and glides.
  • the light barriers L1 and L2 are arranged above the inclined plane SE at a predetermined, equal height h and at a predetermined distance L.
  • the distance traveled by the coin M on the plane SE at time t is designated by the coordinate x (t).
  • the electronic means E detect the times t 0 - t 3 , wherein the times t 0 and t 1 the beginning or the end of covering the first light barrier L1 and the times t 2 and t 3 the beginning or the end of the covering the second photocell L2.
  • a denotes the acceleration assumed to be constant
  • v 0 the initial velocity of the coin M at time t 0 .
  • the time period ⁇ t is a suitably predetermined amount.
  • the value w 1 (B) can be taken from a table after the determination of the chord length B according to the equation (3). Subsequently, the time t 4 can be calculated from equations (1) and (4) and-then-determined from the sequence f by interpolation of the measured value s (t 4 ). In this way, therefore, let the signal of the inductive sensor S1 hold exactly when the coin M with respect to the inductive sensor S1 occupies a predetermined geometric position.
  • the measured value s (t 5 ) can be determined when the rear edge of the coin M passes through the center of the inductive sensor S1, this position being defined by the location w 2 .
  • the timing at which the edge of the coin M passes the center of the inductive sensor S1 can be calculated with high accuracy.
  • the formula (1) could, of course, be replaced by a less accurate equation which, instead of assuming a constant acceleration a of the coin M during the passage between the light barriers L1 and L2, from the times t 0 to t 3, an average velocity of the coin M determined and calculated from the desired time t 4 or t 5 with lower accuracy.
  • the maximum s M (FIG. 2) of the signal s (t) also serves as a criterion for the acceptance or rejection of the coin M.
  • FIG. 3 shows a further device with at least the light barrier L1 and the inductive sensor S1.
  • the distance d 1 between the light barrier L1 and the inductive sensor S1 is adapted to the coins M1 of a special type such that the edge of the coin M1 is approximately in the center of the inductive sensor S1, when the coin M1 no longer covers the light barrier L1 ie at time t 1 .
  • the light barrier L1 triggers the detection of the value of the signal s (t 1 ) at time t 1 directly during the passage of the coin M1 and the latching of the signal s (t) as Episode f can be omitted.
  • the same principle can be applied to the light barrier L2, which is arranged in the direction of the coin after the inductive sensor S1.
  • the distance d 2 between the light barrier L2 and the inductive sensor S1 may be equal to the distance d 1 or, adapted to the coins M2 of a second kind, different therefrom.
  • the proposed devices are particularly suitable for testing coins whose edge consists of a material with a different alloy composition as its center. Such coins appear optically bicoloured.
  • An example of such a bicolor coin is the French ten-centimes coin.
  • the inductive sensor S1 thus serves, depending on the use of the previously described solutions for determining the alloy composition of the edge or the edge and the center.
  • both frequencies f1 and f2 can be acted upon simultaneously or the coil is subjected to the first frequency f1 and then to the second frequency f2 until the maximum of the signal s (t) is reached.
  • Another inductive sensor is usually provided for determining the thickness of the coin M.
  • FIG. 4 now shows a device in which an inductive sensor S2 is arranged relative to the bottom of the coin channel K so that the center of the sensitive zone is at the height of the coin channel K or a small distance z above it, so that the Edge of each coin M is detected.
  • the inductive sensor S2 is disposed in a side wall of the coin channel and its field 1 indicated by an arrow is laterally against the coin M, i. parallel to the axis of rotation of the coin M, directed.
  • the signal of the inductive sensor S2 can be evaluated in a known manner, a synchronization by the light barriers L1, L2 is not required.
  • Fig. 5 shows another means by which it is possible to check whether the coin M fraudulently changes by adhering it to an electrically insulating material such as plastic or cardboard has been.
  • the bottom of the coin channel K and the opposite to the vertical slightly inclined rear wall of the coin channel K are each coated with an electrically conductive layer 2 and 3, for example with metal foils.
  • the electronic means E are arranged to measure the electrical resistance between the two layers 2 and 3.
  • a normal coin M leads during passage at least briefly to a short circuit between the layers 2 and 3, a manipulated coin not. The occurrence of the short circuit is a necessary condition for accepting the coin M.
  • Fig. 6 shows a device in which the coin M impinges on a metallic plate 4, which is fixed or loose in a recess 5 of the bottom of the coin channel K is arranged.
  • the coin channel K has, for example, the geometry described in European patent EP 710 935 and the metallic plate 4 also serves to absorb energy of the coin M.
  • the impact leads to a true coin M to a characteristic metallic sound, by means of an acoustic sensor ie a microphone 6, detected and further processed by the electronic means E.
  • an analysis is provided as to whether a noteworthy signal occurs in a predetermined frequency band. In a manipulated coin, the sound is dull and leads to its rejection.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)

Claims (2)

  1. Dispositif pour déterminer la validité de pièces de monnaie, jetons ou autres objets métalliques plats (M) comprenant un canal pour l'objet (M) incliné par rapport à l'horizontale (H) selon un angle Θ et un dispositif électronique (E) saisissant le moment t0 du début de la couverture d'une barrière photoélectrique (L1) par l'objet (M) parcourant le canal incliné ainsi qu'un signal s(t) en liaison avec le moment t0 utilisé comme critère pour l'acceptation ou le rejet de l'objet (M),
    caractérisé en ce qu'
    un capteur inductif (S1) génère le signal s(t) au passage de l'objet (M) et que le signal de la barrière photoélectrique (L1), au moment t0, détermine le moment t4, t5 de la saisie du signal s(t) du capteur (S1) et que le capteur inductif (S1) génère un champ magnétique (1) orienté latéralement vers l'objet (M) qui parcourt le canal incliné et saisit celui-ci principalement à la hauteur du fond du canal incliné ou à une petite distance (z) au-dessus du fond.
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif électronique (E) saisit aussi le moment t1 de la fin de la couverture de la barrière photoélectrique (L1) par l'objet (M), le moment t2 du début et le moment t3 de la fin de la couverture d'une barrière photoélectrique additionnelle (L2), calcule la longueur de corde (B) de l'objet (M) à partir des quatre moments t0, t1, t2 et t3 selon une équation prédéterminée et calcule le moment t4, t5 de la saisie du signal s(t) du capteur (S1) selon une équation prédéterminée additionnelle à partir de la séquence des moments t0, t1, t2 et t3.
EP19970111430 1996-07-11 1997-07-03 Dispositif pour déterminer la validité de pièces de monnaie, jetons ou autres objets métalliques plats Expired - Lifetime EP0818758B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH173696 1996-07-11
CH1736/96 1996-07-11
CH173696A CH690801A5 (de) 1996-07-11 1996-07-11 Einrichtung zur Prüfung der Echtheit von Münzen, Jetons oder anderen flachen metallischen Gegenständen.

Publications (3)

Publication Number Publication Date
EP0818758A2 EP0818758A2 (fr) 1998-01-14
EP0818758A3 EP0818758A3 (fr) 1999-10-13
EP0818758B1 true EP0818758B1 (fr) 2007-01-03

Family

ID=4217387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970111430 Expired - Lifetime EP0818758B1 (fr) 1996-07-11 1997-07-03 Dispositif pour déterminer la validité de pièces de monnaie, jetons ou autres objets métalliques plats

Country Status (3)

Country Link
EP (1) EP0818758B1 (fr)
CH (1) CH690801A5 (fr)
DE (1) DE59712789D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1391851A1 (fr) * 2002-08-22 2004-02-25 Azkoyen Medios de Pago, S.A. Dispositif et procédé de validation de pièces de monnaie
US9508208B1 (en) * 2014-07-25 2016-11-29 Cummins Allison Corp. Systems, methods and devices for processing coins with linear array of coin imaging sensors
US11410481B2 (en) 2014-07-09 2022-08-09 Cummins-Allison Corp. Systems, methods and devices for processing batches of coins utilizing coin imaging sensor assemblies

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797307A (en) * 1972-01-20 1974-03-19 Little Inc A Coin discriminator
FR2536189A1 (fr) * 1982-11-16 1984-05-18 Gesi Selecteur de pieces de monnaie
CA1206618A (fr) * 1983-02-25 1986-06-24 J. Randall Macdonald Appareil electronique d'identification de monnaies
JPS61289486A (ja) * 1985-06-18 1986-12-19 旭精工株式会社 硬貨選別用センサ−コイル
US4646904A (en) * 1985-09-05 1987-03-03 Coin Acceptors, Inc. Coin sizing means and method
JPH0823898B2 (ja) * 1991-02-28 1996-03-06 株式会社高見沢サイバネティックス 金属体弁別装置
DK0694888T3 (da) * 1994-07-29 1997-03-24 Landis & Gyr Tech Innovat Indretning til kontrol af mønter eller flade genstande
WO1997004424A1 (fr) * 1995-07-14 1997-02-06 Coin Controls Ltd. Dispositif de validation de pieces

Also Published As

Publication number Publication date
CH690801A5 (de) 2001-01-15
DE59712789D1 (de) 2007-02-15
EP0818758A3 (fr) 1999-10-13
EP0818758A2 (fr) 1998-01-14

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