EP0704825B1 - Dispositif pour déterminer l'authenticité de pièces de monnaie, de jetons ou d'autres objets métalliques plats - Google Patents

Dispositif pour déterminer l'authenticité de pièces de monnaie, de jetons ou d'autres objets métalliques plats Download PDF

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Publication number
EP0704825B1
EP0704825B1 EP95810150A EP95810150A EP0704825B1 EP 0704825 B1 EP0704825 B1 EP 0704825B1 EP 95810150 A EP95810150 A EP 95810150A EP 95810150 A EP95810150 A EP 95810150A EP 0704825 B1 EP0704825 B1 EP 0704825B1
Authority
EP
European Patent Office
Prior art keywords
coin
coil
side wall
values
coils
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
EP95810150A
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German (de)
English (en)
Other versions
EP0704825A1 (fr
Inventor
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
Deutsche Telekom AG
Original Assignee
Landis and Gyr Technology Innovation AG
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 Landis and Gyr Technology Innovation AG filed Critical Landis and Gyr Technology Innovation AG
Priority to AT95810150T priority Critical patent/ATE160639T1/de
Priority to DE59501034T priority patent/DE59501034D1/de
Priority to EP95810150A priority patent/EP0704825B1/fr
Priority to DK95810150T priority patent/DK0704825T3/da
Priority to ES95810150T priority patent/ES2109795T3/es
Priority to PL95310542A priority patent/PL177877B1/pl
Priority to CZ952437A priority patent/CZ243795A3/cs
Priority to EE9500067A priority patent/EE03103B1/xx
Priority to NO953707A priority patent/NO308719B1/no
Priority to CN95116556.9A priority patent/CN1134000A/zh
Priority to FI954442A priority patent/FI954442A/fi
Priority to RO95-01644A priority patent/RO115994B1/ro
Priority to TR95/01151A priority patent/TR199501151A2/xx
Priority to RU95116434/09A priority patent/RU2155381C2/ru
Priority to LVP-95-290A priority patent/LV11505B/en
Publication of EP0704825A1 publication Critical patent/EP0704825A1/fr
Application granted granted Critical
Publication of EP0704825B1 publication Critical patent/EP0704825B1/fr
Priority to GR970403232T priority patent/GR3025581T3/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F1/00—Coin inlet arrangements; Coins specially adapted to operate coin-freed mechanisms
    • G07F1/04—Coin chutes
    • G07F1/048—Coin chutes with means for damping coin motion
    • 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
    • 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

Definitions

  • the invention relates to a device for checking the authenticity of coins, tokens or other flat metallic objects of the type mentioned in the preamble of claim 1.
  • Such facilities are suitable, for example, as cashier stations in public telephone stations, vending machines, energy meters, etc.
  • a device for checking the authenticity of coins of the type mentioned in the preamble of claim 1 is known from EP 304 535 B1.
  • the device has three inductive sensors working independently of one another for determining the thickness, the alloy composition and the diameter of the coin to be tested.
  • These inductive sensors are designed as double coils, which are arranged on both sides of the coin channel and are electrically connected in parallel or in series, so that measurement variations due to the coin jumping or jumping in the coin channel can be partially compensated for, with bouncing and jumping lifting off the bottom of the coin channel or a change in the position with respect to the side walls of the coin channel is meant.
  • the use of double coils has the disadvantage that the alloy composition and the thickness of the coin cannot be determined independently of one another.
  • the inductive sensors are part of a parallel resonance circuit, in which the shift in the resonance frequency caused by the coin and the changed quality are measured. The measured changes in these parameters serve as decision criteria for the acceptance or rejection of the coin. It is also envisaged to design an inductive sensor for determining the alloy composition as a simple coil, which is attached only on one side of the coin channel.
  • a coin detector with inductive sensors which are operated at frequencies from 3 kHz to 1 MHz.
  • the inductive sensors are arranged in resonant circuits and in bridge circuits.
  • the resonance frequency in the presence of the coin is used to characterize the coin.
  • energy absorbing elements are known in order to achieve rolling without jumping or jumping of the coin in the area of the sensors.
  • Such energy absorbing elements are preferably ceramic plates which are arranged in the coin channel in such a way that every coin thrown into the coin inlet opening impinges on them.
  • the invention has for its object to provide a device for checking the authenticity of coins, in which the alloy composition and the thickness of the coin can be determined independently of one another, in which jumping or jumping of the coin is firstly excluded as far as possible and secondly a remaining hopping or Jumping leads to the smallest possible measurement spread.
  • the coin channel 1 shows a device for checking the authenticity of coins, tokens or other metallic objects with a coin channel 1, which is preferably formed as a recess in a body 2 made of two plastic parts.
  • the coin channel 1 is delimited by the base 3, a lower and an upper side wall 4 or 5 and a ceiling 6.
  • the lower side wall 4 is provided with integrally formed ribs 7 which are formed in the running direction of the coin M.
  • the coin channel 1 is inclined in the running direction of a coin M to be checked and the two side walls 4 and 5 are inclined at an acute angle of typically 10 ° with respect to the vertical V, so that the coin M to be checked rolls down the floor 3 along the coin channel 1 or slides down and ideally lies flat with one side surface on the ribs 7 of the lower side wall 4.
  • the side walls 4 and 5 each have recesses on the side facing away from the coin channel 1 for receiving staggered coils 9 and 10 and, optionally, metallic plates 11, 12.
  • the coil 9 and the plate 12 are located on the lower side wall 4, which is why they are shown in dashed lines. For the sake of clarity, the recesses are only shown in FIG. 2.
  • the plates 11 and 12 are mounted opposite the coils 9 and 10, respectively. They are preferably round or square, but can also have any other geometric shape.
  • Each coil 9, 10 and possibly the metallic plate 11 or 12 arranged in the opposite side wall 5 or 4 form an inductive sensor.
  • the two coils 9 and 10 have two connections, one of which is led to a common electrical ground connection m, the other to a switch 13, so that they can be connected to an electronic circuit 14 for electrically independent operation.
  • the device further contains a control and evaluation unit 15, for example in the form of a microprocessor, for evaluating the output signal supplied by the electronic circuit 14 and for controlling the device.
  • the circuit 14 and the microprocessor 15 are designed to derive discrete values from the signals measured with the coils 9 and 10, which values are a measure of the alloy or the thickness d of the coin M.
  • the coin M is only considered to be genuine and accepted by the test device if these values match predetermined values within predetermined tolerances, otherwise it is rejected.
  • the shape of its surface facing the coin channel 1 is cylindrical, its radius of curvature R being of comparable size to the distance a: R ⁇ a.
  • R 8 mm is preferred.
  • the ribs 7 are naturally separated by depressions 16, the depth of which is approximately 0.5 mm.
  • the depressions 16 have a flat surface 17 in the area of the greatest depth between the ribs 7, so that the side wall 4 has a minimal wall thickness in the area of the recesses 8, which is only to be expected due to the material properties of the body 2 and the coins M to be expected mechanical loads, but can be determined independently of the radius of curvature R and the distance a.
  • a minimum wall thickness of 0.6 mm is preferably provided, so that the coil 9 mounted in the recess 8 in the lower side wall 4 is at a fixed distance of 1.1 mm from an ideally rolling coin M.
  • the ribs 7 are also there to prevent unwanted sticking or even sticking of a wet coin.
  • the formation of the ribs 7 as cylindrical surfaces with a comparatively large radius of curvature R results in a larger contact surface between the lower side wall 4 and the coin M than is the case with ribs according to the prior art.
  • the extent to which the jumping and jumping of the coin M can also be achieved with ribs 7, the radius of curvature R of which is smaller than the distance a and, for example, is only a / 2, can easily be determined by means of experiments. The shape does not have to be exactly that of a cylinder.
  • a plate parallel to the side wall 4 is loosely fixed in the lower side wall 4 in the area of the coils 9 and 10 instead of the ribs 7.
  • the plate has a comparatively small mass compared to the masses of the coins to be tested and consists e.g. made of metal or ceramic. It is used to absorb the energy of the jumping coin M if the coin strikes the plate and thereby dampens the jumping of the coin M.
  • a coil S means one of the coils 9 or 10.
  • the coil S is characterized electrically by its inductance L S and its ohmic internal resistance R S. It represents an inductive sensor.
  • the above-mentioned combination of the coil S with one of the plates 11 and 12 represents another inductive sensor.
  • the internal resistance R S contains a static component R S, DC and a dynamic component R S, AC ( ⁇ ), which depends on the angular frequency ⁇ of the current flowing through the coil S, of depends on the physical properties of the coin M, on the geometry of the coil S and, in particular, on the distance between the coil S and the coin M.
  • ⁇ angular frequency
  • the diameter of the coil S is selected to be smaller than the diameter of the smallest coin M to be measured and the coil S is on the side wall 4 or 5 of the coin channel 1 is arranged at an appropriate height, so that the smallest coin M to be tested briefly completely covers the coil S during the passage.
  • the diameter of the coil S is, for example, 14 mm.
  • the resistance of the lead wires is comparatively low.
  • Coils 9 and 10 are particularly suitable for wound coils with a ferrite core. The design of the coils 9 and 10 as single coils arranged on only one side of the coin channel 1 and their complete electrical isolation avoids the loss of sensitivity associated with double coils.
  • the electronic circuit 14 operates the coil S in a series resonance circuit and delivers at its output an analog signal which is proportional to the internal resistance R S of the coil S.
  • R S internal resistance
  • the microprocessor 15 carries out a detailed analysis, which is explained below, the result of which are two values, for example the values K 1 and K 2 described below, which are used to decide whether to accept or reject the coin M.
  • the coil 9 is located on the lower side wall 4, on which the coin M moves lying along, so that the distance between the coil 9 and the side surface of the coin M is fixed and is, for example, 1.1 mm.
  • the coin M is made of either a single alloy or several alloys.
  • the internal resistance R 9 of the coil 9 measured in the presence of the coin M depends almost exclusively on the material of the coin M if the frequency ⁇ of the current flowing through the coil 9 is selected appropriately.
  • 3 shows the internal resistance R 9 as a function of the thickness d of the coin M for coins made from different alloys L1, L2 and L3, the coin M being in a symmetrical position in front of the coil 9 during the measurement. It can be seen from this that the internal resistance R 9 is practically independent of the thickness d. With the coil 9 is therefore an important first characteristic size of the coin M, which is almost exclusively from its Alloy or alloy composition depends, easily determinable.
  • the distance between the coil 10 and the coin M depends on its thickness d.
  • the internal resistance R 10 thus depends not only on the material of the coin M, but also on its thickness d.
  • the dependence on the thickness d in the region of interest is approximately linear for all alloys L1, L2 and L3 shown. If the alloy of the coin M is known, the thickness d of the coin M can be clearly determined.
  • the use of the two coils 9 and 10 with or without platelets 11 and 12 as simple coils, which are only arranged on one side wall 4 and 5, respectively, which are arranged on both sides of the coin channel 1 and are electrical are connected in parallel or in series, the mutually independent determination of two parameters of the coin M, which characterize the coin M on the basis of its alloy or alloy composition or thickness.
  • FIG. 5 shows the time course of the output signal of the electronic circuit 14 for three coins of the same type.
  • the coins come into the measuring range of first coil 9, which they leave again at time t 2 .
  • the measuring range of second coil 10 which they leave approximately at time t 4 .
  • the output signal of the coil 9 has two maxima M1 and M2 with values U1 and U2, the output signal of the coil 10 has two maxima m1 and m2 with values v1 and v2.
  • the solid line represents the output signal of a coin M, which rolls down the coin channel 1 (FIG. 1) without jumping or jumping and lies flat on the ribs 7.
  • the dash-dotted line shows the output signal of a coin M which jumped or jumped in the measuring range of the first coil 9: the values U1 and U2 are different.
  • the dashed line shows the output signal of a coin M which jumped or jumped in the measuring range of the second coil 10: the values v1 and v2 are different.
  • the value of the larger of the two maxima corresponds to the smallest distance between the coil 9 and the coin M, since the damping of the coil 9 is then greatest.
  • this is the second maximum M2 with the value U2 for both lines, which is also the more stable of the two maxima.
  • the microprocessor 15 is therefore programmed to determine the greatest value of the output signal in the first coil 9 and to store it as the value K 1 .
  • the damping of the second coil 10 is smaller, the greater the distance between the coil 10 and the coin M.
  • the maximum m2 corresponds to this case.
  • This described analysis of the output signals is carried out by the microprocessor 15 in a manner known per se by.
  • the greatest value of the output signal of the first coil 9 can be determined by numerical comparisons, the maxima m1 and m2 can be determined by forming the first and second derivatives of the sequence f2.
  • the reference resistances r 1 and r 2 are advantageously determined each time immediately before or after the passage of the coin M.
  • each coin M has two differently minted sides, which are called head and number in German.
  • This asymmetrical embossing of the coin M means that the characteristic sizes K 1 and K 2 determined for the coin M depend on the side with which the coin M rests on the side wall 4.
  • the scatter of sizes K 1 and K 2 in a given coin type is further increased by this effect.
  • the range of size K 1 remains sufficiently small to be able to clearly determine the alloy of the M coin.
  • the measurement of the thickness d is disturbed by this effect to an extent that makes it difficult to assess the authenticity of the coin M and / or to determine its value, since coins of different values made from the same alloy often differ very little in thickness.
  • the effect of this effect on the determination of the thickness d can be reduced.
  • the measurements of the coils 9 and 10 give, for example, a value K 1 and a value K 2 . If the coin M has an asymmetrical embossing and its head side faces the coil 9, the measurements give slightly changed values K 1 + ⁇ r 1 and K 2 - ⁇ r 2 .
  • An increase in the size K 1 leads to a decrease in the size K 2 , since a reduction in the distance between the coil 9 and the coin M results in an increase in the distance between the coin M and the coil 10.
  • FIG. 6 shows an advantageous electronic circuit 14 with a series resonance circuit RLC for the separate detection of the change in the ohmic resistance R S and the inductance L S of a coil S.
  • Series resonance circuit RLC represents a purely ohmic impedance Z S in the case of resonance, which is equal to the resistance R S of the coil S.
  • a parallel resonance circuit in the resonance case in which the coil S and the capacitive element C are connected in parallel, behaves like an impedance Z.
  • P j C * R S L S , which depends on the ratio of the resistance R S to the inductance L S of the coil S (j denotes the imaginary unit).
  • the electronic circuit 14 has a differential amplifier 18 with an inverting input 19 and a non-inverting input 20, a resistor 21, a two-stage amplifier circuit 22 and an amplitude detector 23.
  • the series resonance circuit RLC consists of the coil S and a capacitive element C, which are connected in series, and is connected to one terminal with ground m and the other terminal to the inverting input 19 of the differential amplifier 18.
  • the output of differential amplifier 18 is fed back via resistor 21 to inverting input 19 and via amplifier circuit 22 to non-inverting input 20.
  • the amplifier circuit 22 has the tasks of firstly causing the series resonance circuit RLC to oscillate when the circuit 14 is switched on and secondly of providing an amplitude-stabilized voltage U 3 (t) for exciting the series resonance circuit RLC.
  • This object is achieved by two inverters 24 and 25 connected in series and a voltage divider 26 connected in series.
  • a capacitor 27 and 28 is connected upstream of the input of the inverters 24 and 25 and the output of the inverters 24 and 25 is connected via a resistor 29 and 30 fed back to the input.
  • the capacitors 27 and 28 are used for DC decoupling.
  • the resistors 29 and 30 determine the DC operating point of the inverters 24 and 25, respectively.
  • the amplifier circuit 22 behaves like a linear AC voltage amplifier, so that because of the positive feedback of the output voltage U 1 (t) of the differential amplifier 18 thereon Input 20 of the series resonance circuit RLC begins to oscillate.
  • the amplification of the input signal U 1 (t) is chosen so high that the second inverter 25 is then always saturated, so that a rectangular voltage U 2 (t) is present at its output, the two voltage levels of which are positive and negative Voltage level correspond with which the entire electronic circuit 14 is fed in a manner known per se with respect to the mass m bipolar.
  • the ohmic voltage divider 26 which leads to ground m, the level of the voltage U 2 (t) is reduced.
  • a rectangular voltage U 3 (t) is thus present at the output of the amplifier circuit 22 and thus at the input 20 of the differential amplifier 18, which is in phase with the voltage U 1 (t), the amplitude of which is independent of the amplitude of the voltage U 1 ( t) is.
  • the voltage divider 26 has two resistors 31 and 32, the resistor 31 being of the order of magnitude of the resistance R S of the coil S.
  • the resistor 32 is dimensioned such that the level of the voltage U 3 (t) is a few tens to one hundred millivolts.
  • the amplitude detector 23 is used to measure the amplitude of the voltage U 1 (t) and to pass it on to the microprocessor 15 in a suitable form.
  • the resonance frequency ⁇ 0 (L S ) changes with the change in the inductance L S.
  • the circuit 14 described operates in such a way that the series resonance circuit RLC oscillates at a frequency ⁇ which is always equal to the resonance frequency ⁇ 0 (L S ).
  • the coin M passes the coil S, its resistance R S also changes .
  • the evaluation of the signal U 1 (t) is now carried out by the microprocessor 15 as previously described.
  • the frequency ⁇ of the square-wave voltage U 2 (t) present at the output of the second inverter 25 can be determined in a simple manner, not shown, for example with a counter module which is counted by the microprocessor 15 in accordance with the time course of the amplitude of the voltage U 1 (t) can be released while the coin M covers the coil S.
  • the frequencies ⁇ 1 and ⁇ 2 determined in this way in the coil 9 or in the coil 10 correspond to the resonance frequencies when the coin M passes and represent a third and fourth characteristic variable K 3 and K 4 , which are further decision criteria for the acceptance or reject the coin M can serve.
  • the sizes K 1 and K 2 and thus the alloy composition and the thickness d of the coin M can be determined with an accuracy which is sufficient to be able to distinguish a large number of coins M.
  • a coin M2 of a certain alloy and greater thickness d can be simulated with a coin M1 of small thickness d or with a thin metallic plate by deliberately increasing the distance of the coin M1 or the metallic plate from the coil 9 is, for example by inserting a non-metallic layer between the coin M1 and the coil 9, it is sufficient to determine whether the resonance frequency ⁇ 0 (L 2 ) of the coil 9 is greater or less during the passage of the coin M than in the absence of a coin.
  • the sign of the change in resonance frequency ⁇ 0 (L 2 ) of the coil 9 thus advantageously serves as a further decision criterion for the acceptance or rejection of the coin M.
  • a precise determination of the resonance frequency ⁇ 0 (L 2 ) in the presence of the coin M is not necessary.
  • the arrangement of the coil 9 or 10 in the series resonance circuit RLC offers the advantage that a quantity characterizing the alloy composition or the thickness d characterizing quantity can be determined with a simply constructed circuit which measures the damping of the series resonance circuit RLC in the presence of the coin M.
  • the series resonance circuit RLC therefore represents a particularly suitable means for measuring the change in resistance induced in the coil S. This also makes it possible to identify coins which, when using a parallel resonance circuit, result in no or an inadequate signal change if the changes in the inductance L S and the resistance R S compensate one another.
  • the inductance L S of the coil S and the value of the capacitive element C are selected such that the resonance frequency ⁇ 0 (L S ) of the resonant circuit RLC is in the range from 50 to 200 kHz, a typical value being 90 kHz. At these frequencies, the depth of penetration of the magnetic field generated by the coil S into the coin M is sufficiently large that the material composition of the coin M can be determined sufficiently selectively.
  • Inverters 24 and 25 can be, for example, inverters of the known type 4007.
  • at least one of the inverters 24 or 25 is replaced by a NAND or a NOR module with an additional input, the additional input being connected to an output of the microprocessor 15.
  • the circuit 14 can be switched on and off in a simple manner via the logic potential at this output of the microprocessor 15. The circuit 14 can therefore only be switched on for a short time just for checking a coin M.
  • the replacement of both inverters 24 and 25 by a NAND or a NOR module offers the advantage that the circuit 14 requires very little energy when switched off.
  • FIG. 6 shows only one example of an electronic circuit 14 which is suitable for detecting the change in the resistance R S of the coil S by means of a series resonance circuit RLC.
  • a series resonance circuit RLC In the technical literature there are countless other examples of electrical circuits of the series resonance circuit RLC which excite the series resonance circuit RLC with a voltage or a current.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Basic Packing Technique (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Claims (9)

  1. Dispositif pour contrôler l'authenticité de pièces de monnaie (M), de jetons ou d'autres objets métalliques plats, comportant un canal (1) de circulation des pièces de monnaie possédant une paroi latérale inférieure (4) et une paroi latérale supérieure (5), le canal (1) de circulation des pièces de monnaie étant incliné d'un angle prédéterminé par rapport à la verticale (V) et la pièce de monnaie (M) se déplaçant en étant appliquée, dans le cas idéal, contre la paroi latérale inférieure (4), et comportant deux capteurs inductifs disposés dans le canal (1) de circulation des pièces de monnaie, un circuit électronique (14) et une unité de commande et d'exploitation (15), caractérisé en ce que le premier capteur inductif est une bobine (9), qui est disposée sur la paroi latérale inférieure (4), que le second capteur inductif est une bobine (10), qui est disposée sur la paroi latérale supérieure (5), que des moyens (13,14) sont prévus pour faire fonctionner les deux bobines (9,10) d'une manière indépendante du point de vue électrique, que le circuit électronique (14) est agencé pour mesurer la variation dans le temps de la résistance ohmique R9(t) ou R10(t) des deux bobines (9,10) lors du passage d'une pièce de monnaie (M), que l'unité de commande et d'exploitation (15) détermine la valeur maximale de la résistance R9(t) de la première bobine (9) en tant que valeur K1, que l'unité de commande et d'exploitation (15) détermine les maxima locaux (m1,m2) de la résistance R10(t) prise par la seconde bobine (10) et détermine la plus grande des deux valeurs (v1,v2) des deux maxima (m1,m2) en tant que valeur K2 et que les valeurs K1 et K2 ou les valeurs K1 et H2=K1+K2 sont utilisées pour déterminer l'acceptation ou le rejet de la pièce de monnaie (M).
  2. Dispositif pour contrôler l'authenticité de pièces de monnaie (M), de jetons ou d'autres objets métalliques plats, comportant un canal (1) de circulation des pièces de monnaie possédant une paroi latérale inférieure (4) et une paroi latérale supérieure (5), le canal (1) de circulation des pièces de monnaie étant incliné d'un angle prédéterminé par rapport à la verticale (V) et la pièce de monnaie (M) se déplaçant en étant appliquée, dans le cas idéal, contre la paroi latérale inférieure (4), et comportant deux capteurs inductifs disposés dans le canal (1) de circulation des pièces de monnaie, un circuit électronique (14) et une unité de commande et d'exploitation (15), caractérisé en ce que le premier capteur inductif est une bobine (9), qui est disposée sur la paroi latérale inférieure (4), que le second capteur inductif est une bobine (10), qui est disposée sur la paroi latérale supérieure (5), que des moyens (13,14) sont prévus pour faire fonctionner les deux bobines (9,10) d'une manière indépendante du point de vue électrique, que le circuit électronique (14) est agencé pour mesurer la variation dans le temps de la résistance ohmique R9(t) ou R10(t) des deux bobines (9,10) lors du passage d'une pièce de monnaie (M), que l'unité de commande et d'exploitation (15) détermine la valeur maximale de la résistance R9(t) de la première bobine (9) en tant que valeur K1, que l'unité de commande et d'exploitation (15) détermine les maxima locaux (m1,m2) de la résistance R10(t) prise par la seconde bobine (10) et détermine la plus grande des deux valeurs (v1,v2) des deux maxima (m1,m2) en tant que valeur K2, que l'unité de commande et d'exploitation (15) détermine la résistance intérieure r1 de la première bobine (9) et la résistance intérieure r2 de la seconde bobine (10) juste avant ou après le passage de la pièce de monnaie (M), et que les valeurs P1=r1/K1 et P2=r2/K2 ou les valeurs P1 et I2 = P1+P2 sont utilisées pour décider de l'acceptation ou du rejet de la pièce de monnaie (M).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les bobines (9,10) sont disposées, pour la mesure de la résistance, dans un circuit résonnant série (RLC).
  4. Dispositif selon la revendication 3, caractérisé en ce que le circuit électronique (14) comprend un amplificateur différentiel (18) et un circuit amplificateur (22), et dans lequel la sortie de l'amplificateur différentiel (18) est reliée par l'intermédiaire d'une résistance (21) à l'entrée inverseuse (19) et par l'intermédiaire d'un circuit amplificateur (22) à l'entrée non inverseuse (20), et dans lequel le circuit amplificateur (22) amène tout d'abord le circuit résonnant série (RLC) à osciller lors de la fermeture du circuit électronique (14) et, en second lieu, délivre une tension (U3(t)) stabilisée en amplitude, pour exciter le circuit résonnant série (RLC).
  5. Dispositif selon la revendication 4, caractérisé en ce que le circuit amplificateur (22) comprend deux inverseurs (24,25) branchés en série ou des modules NON-ET ou NON-OU.
  6. Dispositif selon l'une des revendications 3 à 5, caractérisé en ce que des moyens sont prévus pour déterminer, lors du passage de la pièce de monnaie (M), le signe de la variation de la fréquence de résonance (ω0(L2)) dans la première bobine (9) et que ce signe est utilisé comme autre critère de décision concernant l'acceptation ou le rejet de la pièce de monnaie (M).
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce qu'une plaquette métallique (11,12) est respectivement disposée sur la paroi latérale (5,4) située à l'opposé des bobines (9,10).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que la paroi latérale inférieure (4) comporte des nervures (7) dans la direction de déplacement de la pièce de monnaie et que le rayon de courbure (R) des nervures (7) est égal à la moitié de la distance (a) entre des nervures voisines (7).
  9. Dispositif selon la revendication 8, caractérisé en ce que le rayon de courbure (R) des nervures (7) est approximativement comparable à la distance (a) entre des nervures voisines (7).
EP95810150A 1994-09-21 1995-03-08 Dispositif pour déterminer l'authenticité de pièces de monnaie, de jetons ou d'autres objets métalliques plats Expired - Lifetime EP0704825B1 (fr)

Priority Applications (16)

Application Number Priority Date Filing Date Title
AT95810150T ATE160639T1 (de) 1994-09-21 1995-03-08 Einrichtung zur prüfung der echtheit von münzen, jetons oder anderen flachen metallischen gegenständen
DE59501034T DE59501034D1 (de) 1994-09-21 1995-03-08 Einrichtung zur Prüfung der Echtheit von Münzen, Jetons oder anderen flachen metallischen Gegenständen
EP95810150A EP0704825B1 (fr) 1994-09-21 1995-03-08 Dispositif pour déterminer l'authenticité de pièces de monnaie, de jetons ou d'autres objets métalliques plats
DK95810150T DK0704825T3 (da) 1994-09-21 1995-03-08 Indretning til prøvning af ægtheden af mønter,spillemærker eller andre flade metalliske genstande
ES95810150T ES2109795T3 (es) 1994-09-21 1995-03-08 Dispositivo para la verificacion de la autenticidad de monedas, fichas u otros objetos metalicos planos.
CZ952437A CZ243795A3 (en) 1994-09-21 1995-09-19 Apparatus for testing genuineness of coins, jettons or other flat articles
PL95310542A PL177877B1 (pl) 1994-09-21 1995-09-19 Urządzenie do sprawdzania autentyczności monet, żetonów lub innych płaskich przedmiotów metalowych
CN95116556.9A CN1134000A (zh) 1994-09-21 1995-09-20 用于检测硬币，辅币或其它扁平金属物体真实性的设备
EE9500067A EE03103B1 (et) 1994-09-21 1995-09-20 Seade müntide, zetoonide ja teiste lamedate metallist esemete ehtsuse kontrollimiseks
FI954442A FI954442A (fi) 1994-09-21 1995-09-20 Laite kolikoiden, pelimerkkien tai muiden litteiden metalliesineiden aitouden tarkastamiseksi
RO95-01644A RO115994B1 (ro) 1994-09-21 1995-09-20 Dispozitiv pentru verificarea autenticităţii monedelor, a fiselor sau a altor obiecte metalice plate
NO953707A NO308719B1 (no) 1994-09-21 1995-09-20 Innretning til prøving av ektheten av mynter, sjetonger eller andre flate, metalliske gjenstander
RU95116434/09A RU2155381C2 (ru) 1994-09-21 1995-09-21 Устройство для проверки подлинности монет, жетонов и других плоских металлических предметов (варианты)
TR95/01151A TR199501151A2 (tr) 1994-09-21 1995-09-21 Madeni paralar jetonlarin veya diger yassi metal cisimlerin gercek olduklarini test etme cihazi.
LVP-95-290A LV11505B (en) 1994-09-21 1995-09-21 Device for testing the authenticity of coins, tokens or other flat metallic objects
GR970403232T GR3025581T3 (en) 1994-09-21 1997-12-03 Authenticating device for coins, tokens and other flat, metallic objects

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
EP94810544 1994-09-21
EP94810544 1994-09-21
CH35095 1995-02-08
CH350/95 1995-02-08
EP95810150A EP0704825B1 (fr) 1994-09-21 1995-03-08 Dispositif pour déterminer l'authenticité de pièces de monnaie, de jetons ou d'autres objets métalliques plats

Publications (2)

Publication Number Publication Date
EP0704825A1 EP0704825A1 (fr) 1996-04-03
EP0704825B1 true EP0704825B1 (fr) 1997-11-26

Family

ID=27172020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810150A Expired - Lifetime EP0704825B1 (fr) 1994-09-21 1995-03-08 Dispositif pour déterminer l'authenticité de pièces de monnaie, de jetons ou d'autres objets métalliques plats

Country Status (16)

Country Link
EP (1) EP0704825B1 (fr)
CN (1) CN1134000A (fr)
AT (1) ATE160639T1 (fr)
CZ (1) CZ243795A3 (fr)
DE (1) DE59501034D1 (fr)
DK (1) DK0704825T3 (fr)
EE (1) EE03103B1 (fr)
ES (1) ES2109795T3 (fr)
FI (1) FI954442A (fr)
GR (1) GR3025581T3 (fr)
LV (1) LV11505B (fr)
NO (1) NO308719B1 (fr)
PL (1) PL177877B1 (fr)
RO (1) RO115994B1 (fr)
RU (1) RU2155381C2 (fr)
TR (1) TR199501151A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE272875T1 (de) * 1996-04-03 2004-08-15 Ipm Internat Sa Einrichtung zur prüfung der echtheit von münzen, jetons oder anderen flachen metallischen gegenständen
GB9823970D0 (en) 1998-11-02 1998-12-30 Coin Controls Improved sensor for coin acceptor
ES2153770B1 (es) * 1999-03-31 2001-10-01 Normalizacion Europ S A "dispositivo controlador de la velocidad de paso de elementos discoidales"
GB2400223A (en) * 2003-04-04 2004-10-06 Money Controls Ltd Guiding coins in a coin acceptor
JP4545184B2 (ja) * 2007-11-20 2010-09-15 東芝テック株式会社 硬貨スロープ
JP5178243B2 (ja) * 2008-03-05 2013-04-10 ローレル精機株式会社 硬貨識別装置
WO2013138152A1 (fr) * 2012-03-14 2013-09-19 Mei, Inc. Capteur de pièce de monnaie
DE202014011507U1 (de) * 2013-09-11 2021-07-20 Blau Product Development Inc. Vorrichtung zum Erkennen von gefälschten oder veränderten Barren, Münzen oder Metall
RU2652644C2 (ru) * 2017-03-28 2018-04-28 Дмитрий Владимирович Самойлов УСТРОЙСТВО ИДЕНТИФИКАЦИИ И ОПРЕДЕЛЕНИЯ ПОДЛИННОСТИ ПЛАТИНОВЫХ МОНЕТ, ЖЕТОНОВ И МЕДАЛЕЙ РОССИЙСКОЙ ИМПЕРИИ, ИЗГОТОВЛЕННЫХ В ПЕРИОД С 1826 г. ПО 1845 г.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2408183A1 (fr) * 1977-11-03 1979-06-01 Signaux Entr Electriques Controleur de pieces metalliques, et notamment de pieces de monnaie
DE3007484A1 (de) * 1980-02-28 1981-09-10 Löwen-Automaten Gerhard W. Schulze GmbH & Co KG, 6530 Bingen Muenzeinwurfkanal
DE3485866T2 (de) * 1983-11-04 1992-12-10 Mars Inc Vorrichtung zum erkennen der gueltigkeit von muenzen.
GB8500220D0 (en) * 1985-01-04 1985-02-13 Coin Controls Discriminating between metallic articles
US4705154A (en) * 1985-05-17 1987-11-10 Matsushita Electric Industrial Co. Ltd. Coin selection apparatus
CH667546A5 (de) * 1985-07-26 1988-10-14 Autelca Ag Einrichtung zur muenzenpruefung.
DK546087A (da) * 1987-10-19 1989-04-20 Gn Telematic A S Fremgangsmaade og apparat til undersoegelse af moenter

Also Published As

Publication number Publication date
TR199501151A2 (tr) 1996-06-21
RO115994B1 (ro) 2000-08-30
ES2109795T3 (es) 1998-01-16
EE03103B1 (et) 1998-06-15
NO953707D0 (no) 1995-09-20
PL177877B1 (pl) 2000-01-31
NO308719B1 (no) 2000-10-16
LV11505B (en) 1996-12-20
DE59501034D1 (de) 1998-01-08
CN1134000A (zh) 1996-10-23
DK0704825T3 (da) 1998-08-10
PL310542A1 (en) 1996-04-01
FI954442A0 (fi) 1995-09-20
ATE160639T1 (de) 1997-12-15
EP0704825A1 (fr) 1996-04-03
LV11505A (lv) 1996-08-20
NO953707L (no) 1996-03-22
FI954442A (fi) 1996-03-22
GR3025581T3 (en) 1998-03-31
RU2155381C2 (ru) 2000-08-27
CZ243795A3 (en) 1996-04-17

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