EP3699875A1 - Procédé et dispositf de vérification d'une pièce de monnaie - Google Patents

Procédé et dispositf de vérification d'une pièce de monnaie Download PDF

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Publication number
EP3699875A1
EP3699875A1 EP20158869.6A EP20158869A EP3699875A1 EP 3699875 A1 EP3699875 A1 EP 3699875A1 EP 20158869 A EP20158869 A EP 20158869A EP 3699875 A1 EP3699875 A1 EP 3699875A1
Authority
EP
European Patent Office
Prior art keywords
coin
plane
reference plane
horizontal reference
determining
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.)
Granted
Application number
EP20158869.6A
Other languages
German (de)
English (en)
Other versions
EP3699875B1 (fr
EP3699875A8 (fr
EP3699875C0 (fr
Inventor
Christoph Frenz
Jörg Müller
Klaus Meyer-Steffens
Ingmar GRÜNDEL
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.)
Coinstitute GmbH
Spaleck Oberflaechentechnik & Co KG GmbH
Crane Payment Innovations GmbH
Original Assignee
Coinstitute GmbH
Induvis GmbH
Crane Payment Innovations 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 Coinstitute GmbH, Induvis GmbH, Crane Payment Innovations GmbH filed Critical Coinstitute GmbH
Priority to EP23190474.9A priority Critical patent/EP4273821A3/fr
Publication of EP3699875A1 publication Critical patent/EP3699875A1/fr
Publication of EP3699875A8 publication Critical patent/EP3699875A8/fr
Application granted granted Critical
Publication of EP3699875B1 publication Critical patent/EP3699875B1/fr
Publication of EP3699875C0 publication Critical patent/EP3699875C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • G07D5/005—Testing the surface pattern, e.g. relief
    • 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 is based on the object of providing an improved method for checking a coin or medal and an improved device for checking a coin or medal. Another object of the present invention is to provide an improved coin or medal.
  • lateral and “horizontal” as used in this description generally refer to a direction in the yz plane, as in FIG Fig. 1 shown.
  • a method and a device for checking a coin or a medal are described.
  • a coin or a medal is also described. All descriptions of properties of a coin and the method are equally applicable to other coin-like elements or methods for checking coin-like elements, even if no explicit reference is made to these coin-like elements.
  • Examples of more Coin-like elements include medals, tokens or tokens and others.
  • the coin or the coin-like element can each be made of metallic materials. They can also be made of non-metallic materials, for example plastic materials, or contain them.
  • Coins or coin-like elements have plastic elevations that protrude over three surfaces of a round, oval and / or any angular disc. These elevations are called relief.
  • This relief can be created, for example, by minting the coin.
  • the relief can also be manufactured by casting, sintering or 3D printing.
  • the relief is usually enclosed by the so-called edge bar. This edge rod has a top edge that lies above the relief and protects it.
  • embossing dies which have a non-horizontal, but curved surface in order to produce an optimal embossing.
  • a different characteristic stamp can be used, the surface of which is curved in a different manner.
  • the extent of this bulge is also known as crowning.
  • FIG. 1 shows a schematic cross-sectional view of a coin 10.
  • the coin 10 has a relief 15 with several protruding areas.
  • the relief 15 is surrounded by an edge bar 11.
  • the edge rod 11 extends to a greater height in the x direction than the relief 15.
  • a coin base 14 that is to say a lowermost surface against which the relief protrudes, can depend within the coin on the crowning of the die used due to the embossing process. As in the lower part of the FIG.
  • the coin base 14 does not run in a horizontal direction, ie parallel to the yz plane, but rather it is concave due to the shape of the die.
  • the degree of concavity can depend on the crowning of the embossing stamp used, but also on other parameters.
  • a method for checking a coin or medal in accordance with embodiments comprises the determination of a horizontal reference plane 101.
  • a measured variable is then generated in relation to the horizontal reference plane 101.
  • a check result is then determined from the measured variable.
  • determining a horizontal reference plane can include determining an edge bar 11 of the coin 10 from a plurality of three-dimensional coordinates which represent a surface of the coin.
  • the horizontal reference plane 101 can be determined from an end plane 102 of the edge bar.
  • the end plane corresponds to that plane that largely completely touches the edge rod 11, that is, rests flat on the edge rod 11 and, for example, corresponds to a horizontal extension of the flank head 12 of the edge rod.
  • the method can additionally include determining the plurality of three-dimensional coordinates. According to further embodiments, these three-dimensional coordinates can also be determined by a separate device and used by the method according to the invention.
  • the three-dimensional coordinates can be determined by general measuring methods for measuring a three-dimensional surface, for example contactless measuring methods, for example optical measuring methods such as a laser triangulation method or a confocal measuring method, or by tactile measuring methods such as scanning or profilometry.
  • general measuring methods for measuring a three-dimensional surface for example contactless measuring methods, for example optical measuring methods such as a laser triangulation method or a confocal measuring method, or by tactile measuring methods such as scanning or profilometry.
  • the edge rod 11 is determined from the three-dimensional coordinates.
  • the edge rod 11 usually extends to a greater height than the relief 15.
  • the edge rod 11 can accordingly be determined by evaluating the maxima of the coordinates.
  • a horizontal reference plane 101 can then be determined from the end plane 102 of the edge rod 11.
  • the closing plane 102 can be determined by a multiple regression from the three-dimensional coordinates of the edge bar points.
  • a measured variable is then generated in relation to the horizontal reference plane 101. For example, the distance between the raised parts of the relief 15 and the reference plane 101 can be determined. In this way, specific features of the coin 10 can be determined. These characteristics can be used to determine whether the coin is a counterfeit coin or not or whether it is just worn out.
  • the check result determined from the measured variable can thus be “real” or “fake”, “worn (unfit)” or “fit for use”.
  • the reference plane 101 can, for example, be that plane which lies flat on the edge rod.
  • a plurality of parallel planes 100 can be conceptually arranged between the reference plane 101 and a base plane 105 and used to evaluate properties of the coin 10.
  • the base plane 105 corresponds, for example, to that plane which is displaced in the vertical direction with respect to the reference plane until it intersects a predetermined portion of the relief.
  • the predetermined proportion can correspond to 99% or some other predefined value.
  • a large portion of the relief is captured or cut by the base plane 105.
  • the term "proportion of the relief” denotes the percentage of the area that is covered with coin material compared to the area that is not covered with coin material. In other words, the portion denotes an area portion in which the x coordinate of the three-dimensional coordinates is greater than the x coordinate of the base plane 105.
  • flank head 12 of the edge bar corresponds to the maximum of the edge bar in the vertical, ie x-direction.
  • the flank foot 13 corresponds to the lowest part of a flank.
  • the height h denotes the displacement of the base plane 105 with respect to the reference plane 101.
  • the measuring plane corresponds to a plane that is vertically displaced with respect to the reference plane.
  • the relief is the volume that is created by lowering the measuring plane in relation to the reference plane until the relief intersects a certain percentage, for example 99% or even less, of the measuring plane.
  • the relief minimum corresponds to that height at which a predetermined percentage, for example 99%, of surface coverage is achieved when the measurement plane is lowered plane-parallel with respect to the reference plane (lowest relief point).
  • the relief maximum is that height at which a predetermined percentage, for example 0.5% of the relief is detected when the measuring plane is lowered plane-parallel with respect to the reference plane (highest relief point).
  • the relief height d corresponds to the difference between the maximum and minimum relief.
  • the relief height d can, for example, be determined in relation to the reference plane 101.
  • the inner circle is the circle that lies within the set of all edge bar flank feet.
  • the reference plane is determined as the final plane of the edge rod, the measured variables can be determined in a reproducible and reliable manner. Accordingly, a reliable check result is obtained. As a result is a quantifiable and reproducible evaluation of the quality of newly issued or in circulation coins or medals possible.
  • the reproducibility of the measurement can be increased.
  • the method is independent of, for example, the crowning of the stamps or properties of the coin materials.
  • the method can also be carried out reliably if the base of the coin is not visible through the embossed image.
  • the evaluation method is independent of the fact that, for example, when determining the plurality of three-dimensional coordinates, the coin rests firmly on a base.
  • the measured variable can be determined in relation to a base plane 105 displaced in the vertical direction with respect to the reference plane.
  • the reference plane is shifted, for example, until a predetermined proportion of the reliefs is recorded.
  • the predetermined proportion can be more than 98%, for example 99%.
  • the measured variable can correspond, for example, to a volume of the relief above the displaced base plane 105. This is in the FIG. 2A, 2B and 2C explained in more detail.
  • FIG. 2A shows a cross-sectional view of the coin 10.
  • the relief 15 can have a first embossed element 151 and a second embossed element 152, for example.
  • the first coined element 151 is shown in FIG. 2 B illustrated in more detail.
  • a height of the surface of the first embossed element 151 is x4 with respect to the base plane 105.
  • the second embossed element rises to different heights, for example x1, x2 and x3 compared to the base plane 105.
  • the respective volume can also be determined in relation to any measurement plane that is shifted, for example, up to different vertical distances with respect to the reference plane 101.
  • the volume can be plotted against the vertical distance, thereby obtaining a measure.
  • the respective volume can also be determined in relation to any measurement plane that is shifted, for example, up to different degrees of area coverage of the relief with respect to the reference plane 101.
  • the volume can be plotted against the degree of area coverage, whereby a measured variable is obtained.
  • this method can be used to determine the entire volume of the relief, which, for example, can correspond to the volume of the plastic deformation of the embossing process.
  • This variable can also be used, for example, to detect the degree of wear (unfit) of a valid coin or a forgery.
  • a height of the safety area can also be determined as a measured variable.
  • the height of the safety area corresponds to the difference between the final plane of the edge bar, i.e. the reference plane 101 and the top edge of the relief.
  • the check result can, for example, correspond to fit / unfit, ie fit / worn or genuine / fake.
  • FIG. 3 summarizes a method according to the invention.
  • a method for checking a coin or medal comprises determining (S110) a horizontal reference plane of the coin or medal, generating (S120) a measured variable with respect to the horizontal reference plane and determining (S130) a checking result from the measured variable.
  • the determination of the horizontal reference plane can additionally comprise the determination (100) of an edge bar of the coin or the medal from a plurality of three-dimensional coordinates which represent a surface of the coin or medal.
  • the horizontal reference plane corresponds to a final plane of the edge bar.
  • the Figures 4A to 4C explain a method for checking a coin according to further embodiments.
  • the method is based on the comparison of an area coverage as a function of a vertical position of a measuring plane with an area coverage that was obtained from real and circulable coins.
  • the area coverage can vary as a function of a vertical position of the measuring plane as a function of the mint in which the coin was minted.
  • the height of the edge rod can also vary, depending on which blank manufacturer produced the associated blank (coin blank).
  • a reference histogram of a real coin can first be determined.
  • the area allocation is dependent on a vertical position the measuring plane for different measuring planes at different vertical positions of a real coin.
  • a reference histogram is determined as the result. This can be done, for example, as in Figure 4A look shown.
  • the x-axis corresponds to the vertical position of the measuring plane
  • the y-axis corresponds to the percentage of area occupied.
  • an area 400 is indicated as a hatched area, which results from a measurement on a large number of real and fit coins.
  • the hatched area 400 thus corresponds to the scatter range or tolerance range of genuine circulation coins.
  • the area 400 shows an area occupied area as a function of a vertical position. It should also be taken into account that the 0 point of the x-axis corresponds to the vertical position of the reference plane 101, ie the end plane of the edge rod.
  • the first solid line 405 denotes a vertical position in which the area occupancy corresponds to a first predetermined value, for example 1%.
  • the second solid line 406 denotes a vertical position in which the area occupancy corresponds to a second predetermined value, for example 99%.
  • the surface occupancy is determined as a function of a vertical position of a coin to be checked.
  • An example of a measurement curve obtained is in Figure 4B labeled 415.
  • the first and second solid lines 405, 406 of the real coin are again indicated.
  • the area occupation area 400 of the real coin is also shown.
  • both a first and a second vertical position (represented by lines 407, 408), in which the area occupancy corresponds to the first or second predetermined value, are different from the associated first or second vertical position (represented by lines 405, 406) of the real coin is different.
  • the function 415 which specifies the area occupancy as a function of the vertical position, has a different slope than the area occupation area 400 of the real coin.
  • Figure 4C shows a further measurement curve 415 in comparison with an area occupation area 400 of real coins.
  • the first and second solid lines 405, 406 of the real coin are also indicated.
  • the second vertical position shown by line 408
  • the function 415 which specifies the area coverage as a function of the vertical position, intersects the area coverage area 400 of the real coin at some points and runs at other locations outside the area coverage area 400 of the real coin.
  • the function 415 has a different slope than the area occupation area 400 of the real coin.
  • FIG. 5A shows a cross-sectional view through a coin 10 with a first stamped security element or relief 153.
  • FIG. 5A further illustrates the edge bar 11 of the coin, the flank head of the edge bar and a reference plane 101.
  • the in FIG. 5A The first relief-like security element 153, which is also shown, has a surface which does not run parallel to the horizontal reference plane. Rather, for example, the surface of the first embossed security element 153 can be configured in a convex shape. According to further embodiments, the surface of the first embossed security element 153 can have convex and concave regions.
  • the second embossed security element 154 may have a concave surface.
  • the ones in the FIG. 5A and 5B The coin shown thus contains a relief which has a surface which is not parallel to a reference plane of the coin.
  • the reference plane 101 corresponds to that plane which rests flat on the edge rod and forms the final plane of the edge rod 11.
  • the coin can have a first stamped security element 153 and a second stamped security element 154.
  • the first embossed security element 153 can have a convex surface area.
  • the second embossed security element 154 may have a concave surface area.
  • the histogram i. the surface occupancy depending on the vertical position of the reference plane have a characteristic shape. The characteristic shape of the histogram is not easily recognizable from the outside.
  • the embossing profile and in particular the histogram can be made characteristic of the examination method described.
  • the security elements can have a characteristic surface profile. This characteristic surface profile can be determined or verified by the method described for checking. In this way, a security feature that cannot be visually recognized by the viewer can be used to determine whether the coin is genuine or forged. If, for example, a characteristic surface profile is used which has a characteristic histogram, the authenticity of a coin can be checked in a simple manner.
  • a characteristic histogram can, for example, have levels at certain Have places where the area occupancy increases by leaps and bounds.
  • the edge rod 11 of the coin can have a characteristic profile, as for example in FIG FIG. 6th is illustrated.
  • FIG. 6th Figure 11 shows a cross-sectional view through a coin in which the edge rod has a special shape.
  • the edge bar flank 11a is step-shaped.
  • 2 steps 111, 112 are formed in the edge bar flank along a vertical direction.
  • the step 111 is at height h1
  • the step 112 is formed at height h2, with h1 and h2 each being measured with respect to the reference plane 101.
  • the height h3 corresponds to the height h of the edge rod 11.
  • the number of steps 111 can be arbitrary.
  • the step can in each case at least partially have a horizontal or also non-horizontal, for example concave or convex, surface.
  • the step can have a planar or flat but not horizontal surface area.
  • the height profile of the edge rod 12 can be determined or verified by the method described for checking a coin. In this way, a security feature that cannot be visually recognized by the viewer can be used to determine whether the coin is genuine or forged.
  • corresponding height profile sections can extend in a circle along the edge rod and be segmented. In this way they can represent a kind of coding or barcode. This coding can be evaluated as a further security feature.
  • the described security features can be combined with one another. Farther Similar steps can also be provided on the side flanks of the relief.
  • FIG. 7th shows a device 20 for checking a coin or medal 10 according to embodiments.
  • the device 20 comprises a device 22 for determining a horizontal reference plane 101, a device 23 for generating a measured variable in relation to the horizontal reference plane 101, and a device 24 for determining a check result from the measured variable.
  • the device 20 can additionally comprise a measuring device 25 for detecting the plurality of three-dimensional coordinates.
  • this measuring device 25 can be suitable for carrying out a measuring method for measuring a three-dimensional surface.
  • the device 22 for determining a horizontal reference plane can comprise, for example, a device 21 for determining an edge rod 11 of the coin 10 from a plurality of three-dimensional coordinates that represent a surface of the coin 10.
  • the horizontal reference plane can correspond to a termination plane of the edge rod 11.
  • the device 20 can furthermore comprise a display device 26 for visualizing, for example, the ascertained check result or the measured variable. According to further refinements, the check result can also be transmitted to another device.
  • Figure 8A illustrates a cross-sectional view of a coin 10 to explain further methods for determining a horizontal reference plane 101.
  • the horizontal reference plane 101 can be determined from a terminating plane 102 of the edge rod 11.
  • the horizontal reference plane 101 can correspond to the upper or lower end plane 102, 103 of the edge rod 11.
  • the horizontal reference plane can also consist of an averaging over the upper and lower end planes 102, 103 of the edge rod 11 can be determined.
  • Figure 8B illustrates a cross-sectional view of a coin 10 for explaining methods for determining a horizontal reference plane 101 according to further embodiments.
  • the horizontal reference plane 101 can also be determined from a terminal plane 104 of a relief 151.
  • the method can therefore additionally include determining a termination plane 104 of a relief 151.
  • the relief 151 can have a horizontal surface.
  • the relief 151 can also have a concave surface, as for example in FIG Figure 5B is shown.
  • a termination plane can be defined over the edge or maxima of the relief 151.
  • the checking method it is known how precisely the reliefs 151 are designed. Therefore the procedure can be adapted accordingly.
  • the determination of the horizontal reference plane 101 can include the determination of a vertical boundary 106 of the coin.
  • the horizontal reference plane 101 can then run perpendicular to the vertical delimitation 106.
  • the determination of the horizontal reference plane 101 can include the determination of a support surface 108 of the coin 10.
  • the coin can rest on a conveyor belt or another support surface 108.
  • the surface of the conveyor belt or the other support surface 108 can then correspond to the horizontal reference plane 101.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
EP20158869.6A 2019-02-22 2020-02-21 Procédé et dispositf de vérification d'une pièce de monnaie Active EP3699875B1 (fr)

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EP23190474.9A EP4273821A3 (fr) 2019-02-22 2020-02-21 Procédé et dispositf de vérification d'une pièce de monnaie

Applications Claiming Priority (1)

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DE102019104562.2A DE102019104562A1 (de) 2019-02-22 2019-02-22 Verfahren zur überprüfung einer münze, vorrichtung zur überprüfung einer münze und münze

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EP3699875A1 true EP3699875A1 (fr) 2020-08-26
EP3699875A8 EP3699875A8 (fr) 2020-10-21
EP3699875B1 EP3699875B1 (fr) 2023-09-06
EP3699875C0 EP3699875C0 (fr) 2023-09-06

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EP23190474.9A Pending EP4273821A3 (fr) 2019-02-22 2020-02-21 Procédé et dispositf de vérification d'une pièce de monnaie
EP20158869.6A Active EP3699875B1 (fr) 2019-02-22 2020-02-21 Procédé et dispositf de vérification d'une pièce de monnaie

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209842A2 (fr) * 1985-07-24 1987-01-28 Andras Gati Dispositif muni d'un capteur pour l'identification de pièces de monnaie
WO2015031922A1 (fr) * 2013-09-09 2015-03-12 Economa Engineering Gmbh Procédé de contrôle de la surface d'objets et pièce de monnaie munie d'une caractéristique d'authenticité

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015117459A1 (de) * 2015-10-14 2017-04-20 Reischauer Gmbh Kursmünze und Verfahren zu deren Herstellung
CN109315890A (zh) * 2018-11-29 2019-02-12 上海舟韧科技有限公司 一种币章边部的丝齿及其制作方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209842A2 (fr) * 1985-07-24 1987-01-28 Andras Gati Dispositif muni d'un capteur pour l'identification de pièces de monnaie
WO2015031922A1 (fr) * 2013-09-09 2015-03-12 Economa Engineering Gmbh Procédé de contrôle de la surface d'objets et pièce de monnaie munie d'une caractéristique d'authenticité

Also Published As

Publication number Publication date
EP4273821A2 (fr) 2023-11-08
EP3699875B1 (fr) 2023-09-06
DE102019104562A1 (de) 2020-08-27
EP3699875A8 (fr) 2020-10-21
EP3699875C0 (fr) 2023-09-06
EP4273821A3 (fr) 2024-05-01

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