EP0936578A1 - Procede d'identification de pieces metalliques discoides presentant un orifice central - Google Patents

Procede d'identification de pieces metalliques discoides presentant un orifice central Download PDF

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Publication number
EP0936578A1
EP0936578A1 EP98935035A EP98935035A EP0936578A1 EP 0936578 A1 EP0936578 A1 EP 0936578A1 EP 98935035 A EP98935035 A EP 98935035A EP 98935035 A EP98935035 A EP 98935035A EP 0936578 A1 EP0936578 A1 EP 0936578A1
Authority
EP
European Patent Office
Prior art keywords
coin
orifice
hole
time
optical
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Withdrawn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
EP98935035A
Other languages
German (de)
English (en)
Inventor
Eugenio Guelbenzu Michelena
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.)
Azkoyen Industrial SA
Original Assignee
Azkoyen Industrial 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 Azkoyen Industrial SA filed Critical Azkoyen Industrial SA
Publication of EP0936578A1 publication Critical patent/EP0936578A1/fr
Withdrawn legal-status Critical Current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
    • G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation

Definitions

  • the present invention relates to an identification method for discoidal metallic pieces with a central orifice, particularly applicable to characterisation and discrimination of coins or tokens having a hole in their centre.
  • the method of the invention allows not only determining whether there is a hole or not in the centre of the coin, but also measuring the size of said hole with enough precision to be used as a basic identification parameter for the coin.
  • Obtaining dimensional characteristics of coins is a normal technique in coin characterisation or identification processes. For this selectors are used provided with means which give the information needed to know the diameter or the length of a chord of the coin.
  • the chord of a coin is measured as it is intercepted in its path through the selector by a pair of photosensors placed level with the track of the coin.
  • the chord intercepted by the two sensors is characteristic of the coin size and is used in the validation process for said coin.
  • Patent 555,181 combines the measuring system described above with an electromagnetic sensor which provides information on the characteristics of the alloy used for the analysed coin.
  • the object of the present invention is to solve the problem described by a method which allows discrimination and characterization of coins or metal tokens characterized by having a hole in their centre.
  • the method of the invention can be carried out by selectors of the type described in Spanish patent no. 555,181 which provide two optical sensors and one electromagnetic sensor, in a segment of the path which the coins must travel inside the selector.
  • the procedure of the invention comprises, in combination, obtaining and measuring values characteristic of the signal created by the central orifice as it passes the electromagnetic sensor, and calculation of the chord length of the hole intercepted by the optical sensors.
  • a signal is produced from which certain characteristic values are obtained, which may consist of the peak value of the central area of the signal and of the values of the far peaks in said area.
  • chord length intercepted as the hole passes the optical sensors is calculated as a function of the time when the coin begins to intercept and ceases to intercept the first and second optical sensor and as a function of the times when one of the optical sensors starts to see and stops seeing the coin orifice.
  • the method of the invention is aimed at the identification of metallic discoidal pieces 1 with a central orifice 2, figure 1, by a selector provided, in the segment of the path followed by the coins inside the selector, with two optical sensors 3 and 4, and a electromagnetic sensor 5, which in the example described is placed between optical sensors 3 and 4.
  • a selector provided, in the segment of the path followed by the coins inside the selector, with two optical sensors 3 and 4, and a electromagnetic sensor 5, which in the example described is placed between optical sensors 3 and 4.
  • Detectors 3 and 4 directly provide the time when the coin and the hole pass each one, and considering that the motion is uniformly accelerated, by applying a formula explained below, the chord of the hole intercepted by the optical sensors is calculated to a large degree of precision.
  • Electromagnetic sensor 5 is also sensitive to the existence of a hole in the centre of the coin.
  • Figures 2, 3 and 4 show the signal produced by the electromagnetic sensor a orifice 2 of the coin passes, where it can be seen that as hole 2 of the coin is larger there is a increase in central peak P2 given by the electromagnetic sensor's signal.
  • This electromagnetic sensor is preferably of a small size in order to achieve greater sensitivity to small hole diameters. An ideal size for this sensor might be 9 mm.
  • these sensors In order for sensor measurements to be representative of hole 2 of the coin, these sensors should be mounted in a position such that hole 2 of coin 1 intercepts electromagnetic sensor 5 and optical detectors 3 and 4. If there is a coin whose hole does not cross the optical sensors, whether due to the coin diameter or the size of the hole, this is not particularly problematic as there is still the electromagnetic sensor.
  • Figure 5 shows the signals of the two optical photosensors when crossed by a coin without a central orifice, where the top one corresponds to optical sensor 3 and the bottom one to optical sensor 4. At the time when the coin intercepts sensors 3 and 4 the corresponding signals 6 and 6', continuous, are produced, the second one being shorter since, a mentioned above, the motion of the coin is taken to be uniformly accelerated.
  • Figure 6 shows the same signals for a coin passing the optical sensors, but here due to a coin with a small central orifice, of for example 3 mm.
  • signals 6 and 6' produced by sensors 3 and 4 are interrupted in segments 7 and 7' which correspond to the central orifice crossing the sensors.
  • figure 7 shows signals similar to figure 6, but caused by a coin with a larger central orifice, approximately 9 mm, which may match the diameter of the orifice of traditional coins.
  • the distance between optical sensors 3 and 4 is labeled d, figure 1.
  • a time tJ is defined which is equidistant of times tA and tE which correspond to the times when the coin begins to intercept optical sensor 3 and optical sensor 4 respectively.
  • a time tK is defined which is equidistant of times tD and tH, which correspond, respectively, to the times when the coin ceases to intercept optical sensors 3 and 4.
  • a time tL is defined equidistant from times tF and tG, which correspond respectively to the times when the second optical sensor 4 detects the start and finish of the passing of orifice 2 of the coin.
  • a time can be defined equidistant from tB and tC, corresponding, respectively, to the times when the first optical sensor 3 detects the start and finish of orifice 2 of the coin passing.
  • TF is the time when photodiode 4 begins to see hole 2 and tG when it ceases to see it. Knowing the average speed between times tF and tG and the time interval tG-tF the size of the hole of the coin is found (strictly the chord length at the height of the photodiodes).
  • ELECTROMAGNETIC MEASUREMENT As can be seen in figures 2, 3 and 4, the signal given by electromagnetic sensor 5 is mainly affected in its central area, with peak 2 increasing with the hole diameter. We can therefore take P2 as a parameter representative of the size of the hole. Since the value of P2 is also sensitive to other coin properties, such as the alloy or its thickness, it may be of interest to consider a relative value between the peaks, such as P2 - P1, P2 - P3 or 2xP2/P1 + P3 . Any of these three values can be taken as a parameter representative of the size of the hole, being more stable than the value of peak P2.
  • signal 8 produced by electromagnetic sensor 5 is mainly affected in its central area 9, with the value of peak P2 increasing with the hole diameter.
  • P2 a representative parameter of the size of the hole. Since the value of P2 is also sensitive to other coin properties, such as the alloy or its thickness, it may be of interest to consider a relative value between the peaks, such as P2 - P1, P2 - P3 or 2xP2/P1 + P3 . Any of these three values can be taken as a parameter representative of the size of the hole, being more stable than the value of peak P2.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
EP98935035A 1997-07-29 1998-07-24 Procede d'identification de pieces metalliques discoides presentant un orifice central Withdrawn EP0936578A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES1600071 1997-07-29
ES9701671A ES2127150B1 (es) 1997-07-29 1997-07-29 Metodo para la identificacion de piezas metalicas discoidales con un orificio central.
PCT/ES1998/000216 WO1999006965A1 (fr) 1997-07-29 1998-07-24 Procede d'identification de pieces metalliques discoides presentant un orifice central

Publications (1)

Publication Number Publication Date
EP0936578A1 true EP0936578A1 (fr) 1999-08-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98935035A Withdrawn EP0936578A1 (fr) 1997-07-29 1998-07-24 Procede d'identification de pieces metalliques discoides presentant un orifice central

Country Status (7)

Country Link
EP (1) EP0936578A1 (fr)
AU (1) AU8442198A (fr)
BR (1) BR9806119A (fr)
CO (1) CO4840550A1 (fr)
ES (1) ES2127150B1 (fr)
PE (1) PE103499A1 (fr)
WO (1) WO1999006965A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2599059A2 (fr) * 2010-07-27 2013-06-05 Coin Acceptors, Inc. Dispositif de détection
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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2170678B1 (es) * 2000-06-30 2003-09-16 Azkoyen Medios De Pago Sa Metodo y aparato de obtencion de caracteristicas fisicas de monedas para su identificacion.
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

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509633A (en) * 1983-08-24 1985-04-09 Reed Industries, Inc. Electronic coin validator with improved diameter sensing apparatus
JP2888657B2 (ja) * 1991-03-06 1999-05-10 株式会社東芝 コインの穴有無判別装置およびコインの穴有無判別方法
DE9114313U1 (fr) * 1991-11-16 1993-03-18 National Rejectors, Inc. Gmbh, 2150 Buxtehude, De
JPH06119523A (ja) * 1992-08-20 1994-04-28 Eeone Technol:Kk 硬貨判別装置
ES2093478T3 (es) * 1994-07-29 1996-12-16 Landis & Gyr Tech Innovat Dispositivo para examinar monedas u objetos planos.
US5662205A (en) * 1994-11-03 1997-09-02 Coin Acceptors, Inc. Coin detection device
JP3507573B2 (ja) * 1995-02-21 2004-03-15 グローリー工業株式会社 硬貨識別装置
JPH08329302A (ja) * 1995-05-31 1996-12-13 Oki Electric Ind Co Ltd コイン識別装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9906965A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2599059A2 (fr) * 2010-07-27 2013-06-05 Coin Acceptors, Inc. Dispositif de détection
EP2599059A4 (fr) * 2010-07-27 2014-01-29 Coin Acceptors Inc Dispositif de détection
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

Also Published As

Publication number Publication date
ES2127150B1 (es) 1999-11-16
CO4840550A1 (es) 1999-09-27
ES2127150A1 (es) 1999-04-01
WO1999006965A1 (fr) 1999-02-11
AU8442198A (en) 1999-02-22
PE103499A1 (es) 1999-11-02
BR9806119A (pt) 1999-08-31

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