WO2000043961A1 - Procede et appareil pour la validation et la caracterisation des pieces de monnaie - Google Patents

Procede et appareil pour la validation et la caracterisation des pieces de monnaie Download PDF

Info

Publication number
WO2000043961A1
WO2000043961A1 PCT/ES1999/000400 ES9900400W WO0043961A1 WO 2000043961 A1 WO2000043961 A1 WO 2000043961A1 ES 9900400 W ES9900400 W ES 9900400W WO 0043961 A1 WO0043961 A1 WO 0043961A1
Authority
WO
WIPO (PCT)
Prior art keywords
coin
edge
light
coins
reflected
Prior art date
Application number
PCT/ES1999/000400
Other languages
English (en)
Spanish (es)
Inventor
Eugenio Guelbenzu Michelena
Jose Tornos Gimeno
Manuel Quintanilla Monton
Jesus Atencia Carrizo
Original Assignee
Azkoyen Medios De Pago, S.A.
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 Azkoyen Medios De Pago, S.A. filed Critical Azkoyen Medios De Pago, S.A.
Priority to EP99961074A priority Critical patent/EP1067485B1/fr
Priority to DE69942337T priority patent/DE69942337D1/de
Priority to AU17813/00A priority patent/AU1781300A/en
Publication of WO2000043961A1 publication Critical patent/WO2000043961A1/fr

Links

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
    • G07D5/10—Testing the rim, e.g. the milling of the rim

Definitions

  • the present invention relates to a method for the validation and characterization of coins, by verifying the relief existing in the edge of said coins.
  • the invention also includes the apparatus for carrying out the method of validation and characterization.
  • the method and apparatus of the invention are intended to obtain an electrical signal that is representative of the existence or not of relief and also of the type of relief existing in the edge of the coin, both reliefs and recesses being understood as being possible. present the song, whatever configuration they present, for example in the form of nerves, grooves, etc.
  • WO 91/066072 a device that analyzes the knurling of the edge of the coins by lighting a coin arc is proposed.
  • the reflected light is focused on a sensor by means of a lens.
  • a grid-shaped mask is placed that has an image similar to that of the valid currency engraved. If the periodicity of the mask and the knurling of the coin match, a modulated signal will be produced that serves to recognize the coin.
  • This procedure has the disadvantage that the analysis of the coin occurs in a very small space zone, which coincides with the circular sector of the coin edge when it is faced with the optical axis of the lens.
  • the device and procedure described do not allow a detailed analysis of the coin's edge, since it is only capable of measuring the total level of light reflected by the coin, and a similar level of reflection can be provided by two coins with different slots or by On the contrary, obtain two different results with two identical currencies but with a different state of conservation (different brightness).
  • the object of the present invention is a method and an apparatus that allow obtaining information on the edge of the coin that is independent of its brightness or state of preservation.
  • the invention provides a signal that is representative of the relief (hereinafter grooves) of the edge of the coin, whereby for example the number of coin slots can be obtained during a given path, the passage between slots, the type of grooving ( continuous or interrupted) or if the coin is smooth.
  • dimensional characteristics of the groove can be obtained, such as the dimension of the grooves, separation between grooves and uniformity of the grooves.
  • the light emitter by which the edge of the coin is illuminated and the receiver of the light reflected by said edge are arranged so that the receiver is reached only by the diffuse reflection that originates the relief of the surface of said song, but not because of the specular reflection produced by the smooth areas of the song that lack relief.
  • the illuminating beam has a width equal to or less than the dimension of the slots.
  • the light coming from the emitter is passed through a slit that produces a rectangular beam that reaches the edge of the coins along a strip parallel to the axis of said coin that covers the entire thickness of said edge and is of equal width or less than the thickness of the grooves or geometric alterations of the edge of said coins.
  • the light beam In order for the measurement to be prolonged for a sufficient distance to be able to examine an important area of the periphery of the coin, the light beam must maintain its constant characteristics along said path, so a collimated beam should preferably be used.
  • the beam with which the edge of the coins is illuminated will be substantially parallel to the plane of rolling of the coin or will form a small angle with it and will affect the edge of the coins at a height, relative to the raceway, greater than the radius of these coins.
  • the apparatus for carrying out the process of the invention comprises a collimated light emitter, which generates a parallel light beam or forming a small angle with respect to the rolling ramp of the coin; a wall or screen that interposes between the light emitter and the coin and has a slit that allows the passage of a rectangular beam of light that illuminates the entire width of the coin's edge; and a reflected light receiver arranged so that it is reached only by the diffused light reflected by the edge of the coin and not by the light reflected specularly by said edge. Is feature allows the receiver to be located in a nearby area of the transmitter.
  • Figure 1 is a basic assembly scheme of the apparatus of the invention.
  • Figure 2 is a diagram of the incident light rays and reflected by the edge of a coin, according to the method of the invention.
  • Figure 3 is a sectional detail of the slit through which the beam of rays that will affect the edge of the coin is shaped, according to the method of the invention.
  • Figure 4 shows the beam of light obtained with the slit of Figure 3, which affects the edge of a coin.
  • Figures 5 to 8 represent the signals obtained with the apparatus and method of the invention, from coins with different reliefs in their edge.
  • Figure 1 shows a coin 1 that rolls on a raceway 2.
  • the edge of the coin is illuminated by an emitter 3, preferably constituted by a laser diode, which emits a light 4 that is passed through a slit 5 that produces a beam 6 of rectangular contour that will affect the edge of coin 1.
  • an emitter 3 preferably constituted by a laser diode, which emits a light 4 that is passed through a slit 5 that produces a beam 6 of rectangular contour that will affect the edge of coin 1.
  • the slit 5 through which the light 4 produced by the emitter 3 is passed in greater detail obtaining a beam 6 of rectangular configuration which, as seen in Figure 4, affects the edge of the coin according to a strip 7 that is parallel to the axis 1 'of said coin, the length of this strip being preferably greater than the thickness of the edge of the coin 1 and of width equal to or less than the thickness of the geometric alterations or slots 8 of the edge of coin 1, which are intended to be measured.
  • the edge of the coin 1 is illuminated at an angle substantially parallel to the rolling plane 2 of the coin 1 and so that the beam 6 strikes said edge above the center of the coin.
  • the detector 9 will only receive the diffuse reflection 11 produced by the striations or geometric alterations of the coin edge, while the specular reflection 12, due to the smooth areas of the edge of the coin. coin does not reach the detector 9.
  • the receiver 9 provides a signal of increasing amplitude as the coin 1 approaches the receiver (distance square law).
  • This effect which in principle does not matter unless the amplitude of the pulses is used as a differentiating characteristic of the coins, can be reduced by slightly tilting the beam 6 with respect to the rolling direction, with a small angle of alpha, by example of the order of 3 or , in case the detector 9 is placed close to the emitter 3. Placing the detector 9 in the same area as the emitter 3 will prevent the arrival of the direct reflection 12 to the receiver.
  • the emitter 3 will be a semiconductor, infrared or visible laser type whose output is a collimated beam of light.
  • this type of device provides a beam of elliptical section, which is no problem for the application, since what is intended is to obtain a rectangular beam. In any case, this is achieved, as explained above, by inserting the slit 5 of the appropriate dimensions between the emitter 3 and the coin 1 to achieve the appropriate beam 6, as stated, the maximum dimension coinciding with the major axis. of the elliptical section of the beam. Thanks to the use of collimated light, the slit 5 can be placed close to the emitter 3, thus allowing a compact and small size assembly.
  • the optimal dimensions of the slit 5 are determined, in terms of length, by the maximum thickness of the coin to be measured, which can be estimated at about 3 mm.
  • the dimension of the height of the slit 5 it is determined on the one hand by the fineness of details or the finest grooving that is intended to be recognized and, on the other hand, by the diffraction effect that appears when the slit is excessively narrow. It has been found that a slit height between 0.2 and 0.4 mm may be suitable for commonly used coins and diffraction is tolerable for bands from red to near infrared.
  • the receiver 9 will be mounted so that it is not sensitive to the light 12 reflected specularly from the coin, but to the diffuse light 11 that is reflected by the relief of said coin.
  • Figures 5 to 8 show the signals provided by the receiver 9 by different forms of reliefs in the edge of a coin. When the coin has no relief, the detector will provide virtually no signal.
  • Fig. 5 shows the signal that is obtained when a coin with the "Spanish flower” edge type consisting of separate curved incisions is introduced a distance several times greater than the size of said incision.
  • impulses appear separated by intervals without a signal, which correspond to the incisions and to the flat areas of the edge of the coin respectively.
  • Fig. 6 corresponds to the signal obtained by a sample of a coin similar to the future of 1 Euro, which has a fine striatum interrupted by areas without relief.
  • impulses that correspond to the ridges of the coin edge are clearly appreciated, but the separation between impulses and their duration is clearly inferior, because they are much finer grooves.
  • Fig. 7 shows a coin that has a uniform striatum, and it can be seen that the impulses have the characteristic of a noticeably constant duration and separation between them. However, a "compression" of the signal can be seen as we move from left to right, which is due to the currency's own acceleration by simply rolling down an inclined ramp, as shown in fig.l . Finally, in fig. 8 we can see the signal that appears with a coin that in addition to having a uniform striatum presents uniformly distributed figures. In this case the representative impulses also appear of the striatum but amplitude modulated by the signal produced by said motives.
  • the pulses can be counted during a certain space or interval of time, the durations of the pulses and the separation between them can also be measured, or the amplitude and frequency of said pulses can be measured.
  • the proposed device can be completed with known systems for measuring the diameter of the coin, for example, as described in the patent ES 557 523 of the same applicants, constituted by means of optical detectors 13, which in addition to their dimension (string intercepted by the optical detectors), can provide the measure of the average velocity of the input and output edges of the coin as well as its acceleration.
  • optical detectors 13 which in addition to their dimension (string intercepted by the optical detectors), can provide the measure of the average velocity of the input and output edges of the coin as well as its acceleration.
  • characteristic parameters of the currency such as slot type (uniform, interrupted thick, fine with or without inclusions etc.), number of slots between two fixed positions (for example between the two diameter photodetectors, or between two instants of time), number of slots in the case of grooving interrupted, space between grooves and space without grooves (case of grooving interrupted), uniformity of grooving, relationship between grooved and smooth area, etc., being of great help in the process of identifying coins, since the engraving characteristic of the The singing of the coins, as a general rule, is constant between different mintings of the same coin.
  • the precision and fineness of obtaining characteristics that the device of the invention is capable of providing makes it of special application in the discrimination of fraud and interference between currencies of different countries.

Landscapes

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

Abstract

Le procédé selon l'invention consiste à éclairer partiellement la tranche de la pièce de monnaie (1) à l'aide d'un faisceau lumineux collimaté (6) de section rectangulaire. Ce faisceau atteint la tranche de la pièce en formant une frange parallèle à l'axe de ladite pièce, et dont la largeur est inférieure ou égale à l'épaisseur des altérations devant être détectées. Un capteur (9) est prévu pour détecter la lumière reflétée de telle sorte qu'il ne capte que la lumière diffusée (11) émise par le relief ou les altérations de la surface de la tranche de la pièce, mais ne capte pas la réflexion spéculaire (12) générée par les zones lisses de cette tranche.
PCT/ES1999/000400 1999-01-25 1999-12-28 Procede et appareil pour la validation et la caracterisation des pieces de monnaie WO2000043961A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99961074A EP1067485B1 (fr) 1999-01-25 1999-12-28 Procede et appareil pour la validation et la caracterisation des pieces de monnaie
DE69942337T DE69942337D1 (de) 1999-01-25 1999-12-28 Verfahren und vorrichtung zum prüfen und kennzeichnen von münzen
AU17813/00A AU1781300A (en) 1999-01-25 1999-12-28 Method and device for validating and characterizing coins

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP9900141 1999-01-25
ES009900141A ES2152175B1 (es) 1999-01-25 1999-01-25 Metodo y aparato para la validacion y caracterizacion de monedas.

Publications (1)

Publication Number Publication Date
WO2000043961A1 true WO2000043961A1 (fr) 2000-07-27

Family

ID=8307052

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES1999/000400 WO2000043961A1 (fr) 1999-01-25 1999-12-28 Procede et appareil pour la validation et la caracterisation des pieces de monnaie

Country Status (8)

Country Link
EP (1) EP1067485B1 (fr)
AR (1) AR022184A1 (fr)
AU (1) AU1781300A (fr)
DE (1) DE69942337D1 (fr)
ES (2) ES2152175B1 (fr)
PE (1) PE20001262A1 (fr)
WO (1) WO2000043961A1 (fr)
ZA (1) ZA200000152B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2107533A2 (fr) 2008-03-10 2009-10-07 Azkoyen Medios de Pago, S.A. Système et procédé de sélection de pièces
CN113053019A (zh) * 2021-03-08 2021-06-29 中钞长城金融设备控股有限公司 一种硬币边部质量检测方法及系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2281279B1 (fr) * 2008-04-18 2015-11-04 Coinsecure, Inc. Appareil pour produire des signatures optiques à partir de la frappe de la monnaie
US8023121B2 (en) 2008-04-18 2011-09-20 Coinsecure, Inc. Method for optically collecting numismatic data and associated algorithms for unique identification of coins
JP2012212221A (ja) * 2011-03-30 2012-11-01 Fujifilm Corp 撮像ユニット、及び硬貨識別装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE861396A (fr) * 1976-12-02 1978-06-01 Mars Inc Dispositif de verification de pieces de monnaie
GB2071381A (en) * 1980-03-04 1981-09-16 Mars Inc Coin Testing Device
DE3711941A1 (de) * 1987-04-09 1988-10-20 Standard Elektrik Lorenz Ag Optoelektronischer muenzpruefer
GB2212313A (en) * 1987-11-13 1989-07-19 Coin & Micro Systems Limited Identifying articles
EP0416932A1 (fr) * 1989-09-08 1991-03-13 Glory Kogyo Kabushiki Kaisha Discriminateur de pièces de monnaie
WO1991006072A1 (fr) * 1989-10-17 1991-05-02 Datalab Oy Procede et moyen d'identification d'une piece de monnaie

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE861396A (fr) * 1976-12-02 1978-06-01 Mars Inc Dispositif de verification de pieces de monnaie
GB2071381A (en) * 1980-03-04 1981-09-16 Mars Inc Coin Testing Device
DE3711941A1 (de) * 1987-04-09 1988-10-20 Standard Elektrik Lorenz Ag Optoelektronischer muenzpruefer
GB2212313A (en) * 1987-11-13 1989-07-19 Coin & Micro Systems Limited Identifying articles
EP0416932A1 (fr) * 1989-09-08 1991-03-13 Glory Kogyo Kabushiki Kaisha Discriminateur de pièces de monnaie
WO1991006072A1 (fr) * 1989-10-17 1991-05-02 Datalab Oy Procede et moyen d'identification d'une piece de monnaie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2107533A2 (fr) 2008-03-10 2009-10-07 Azkoyen Medios de Pago, S.A. Système et procédé de sélection de pièces
CN113053019A (zh) * 2021-03-08 2021-06-29 中钞长城金融设备控股有限公司 一种硬币边部质量检测方法及系统
CN113053019B (zh) * 2021-03-08 2022-11-01 中钞长城金融设备控股有限公司 一种硬币边部质量检测方法及系统

Also Published As

Publication number Publication date
EP1067485B1 (fr) 2010-05-05
AR022184A1 (es) 2002-09-04
ES2345966T3 (es) 2010-10-06
DE69942337D1 (de) 2010-06-17
ZA200000152B (en) 2000-09-27
ES2152175B1 (es) 2001-07-01
AU1781300A (en) 2000-08-07
ES2152175A1 (es) 2001-01-16
EP1067485A1 (fr) 2001-01-10
PE20001262A1 (es) 2000-12-11

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