EP1445739B1 - Verfahren und Vorrichtung zum Unterscheiden von Münzen - Google Patents

Verfahren und Vorrichtung zum Unterscheiden von Münzen Download PDF

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Publication number
EP1445739B1
EP1445739B1 EP03380018.6A EP03380018A EP1445739B1 EP 1445739 B1 EP1445739 B1 EP 1445739B1 EP 03380018 A EP03380018 A EP 03380018A EP 1445739 B1 EP1445739 B1 EP 1445739B1
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EP
European Patent Office
Prior art keywords
coin
sensors
phase
inductive sensor
measurements
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EP03380018.6A
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English (en)
French (fr)
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EP1445739A1 (de
Inventor
Ibon Cerro Aguirre
Ane Martinez De Guerenu Elorza
Fernando Aritzi Urquijo
José Miguel Garcia Sayes
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Azkoyen SA
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Azkoyen SA
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Priority to ES03380018T priority Critical patent/ES2431547T3/es
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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
    • G07D5/08—Testing the magnetic or electric properties

Definitions

  • the present invention refers to coin selectors defining a path or track inside along which the coins run between an inlet and one or more outlets.
  • This type of selectors is used in machines whose operation is carried out by means of introducing one or more coins of a value sufficient for obtaining the requested product or service.
  • selectors normally have sensors in the coin track that are capable of dynamically measuring different dimensional features (radius, thickness), alloy (weight, hardness) features, electrical features and magnetic features. The value and validity of the coins can thus be detected.
  • One of the most important features of a coin is the material composing it. This is even more important in the case of bicolor or multilayer coins in which the coin is constructed combining different alloys.
  • One of the easiest ways of characterizing a metal alloy is determining its electric features (conductivity) and/or magnetic features (permeability).
  • the sensors used for determining said features are the inductive type, also called electromagnetic sensors.
  • Inductive sensors are based on inducing and measuring electric currents in the coin.
  • a variable magnetic field By subjecting the coin to a variable magnetic field, according to Faraday's law, currents are created whose magnitude, phase and distribution for a determined exciter field depend on the electric, magnetic and dimensional features of the coin.
  • the depth to which an electromagnetic field penetrates in the coin decreases as the excitation frequency increases. Therefore, as frequency increases, the physical properties of the material of the coin surface have a greater effect on the field than does the inner material and the thickness of the coin.
  • the excitation frequency must be low enough so that the electromagnetic field penetrates up to the inner material of the coin.
  • Coin selector devices can be found on the market which include several inductive sensors for the purpose of obtaining measurements independent of the materials of the core and crown, without the measurements being affected by the contact resistance.
  • documents WO 99/12130 belonging to Azkoyen and WO 99/23616 belonging to Coin Controls describe configurations including several, sufficiently small inductive sensors for measuring different regions of the coin when it passes through the ramp along which the sensors are arranged.
  • a basic configuration of the electromagnetic sensor is that which is constituted by a single coil.
  • Said coil carries out excitation functions, creating an electromagnetic field inducing currents in the material of the coin, and at the same time, measurement functions of the eddy currents in the material.
  • the magnetic field created by the eddy currents is phase shifted with regard to the exciter field, making the resulting magnetic field vary, and it is reflected in the coil as a change in its impedance.
  • the coil is normally wound in a material with high permeability, such as ceramic ferrites.
  • One way to attenuate the lift-off effect in measurements is to arrange a coil on each side of the coin pass track. Said attenuation is based in that a shift of the coin in one direction along the common axis of the coils implies a decrease of the measurement in one of the coils and an increase in the measurement of the coil on the other side, such that the sum of the measurements produces a partial compensation of this effect.
  • Patent application GB-2107104-A discloses a configuration with two significantly equal sensors formed by coils wound in ferrite cores, placed facing on the walls of the coin pass channel.
  • the two coils can be connected in series, such that the magnetic fields created are added (arrangement called “in phase”) or subtracted (“counterphase” arrangement). Each one of these configurations creates currents in the coin with a different distribution, thereby providing a different characterization of the coin.
  • Another configuration type based on two coils is that which uses a coil as excitation, arranged on one side of the channel through which the coin passes, and the other facing the other side of the channel as a receiver, such that it measures the field reaching it.
  • This configuration is called "emitter-receiver”.
  • An example of this configuration type is disclosed in patent application EP-0110510 .
  • US patent number US-5337877 discloses a coin selector with a thickness sensor constituted of two coils located one on each side of the coin pass channel, characterized in that the signals of each one of the coils, indicative of the effects of the coin on an electromagnetic field, are dependent on the position of the coin in the channel with regard to each one of the coils.
  • the signals of each one of the coils are separately processed to derive values which, combined, generate measurements indicative of the thickness of the coin which are significantly independent of the position thereof.
  • each one of the coils is connected to an oscillator circuit operating at a relatively high frequency, for example 1 MHz.
  • the frequencies are preferably high so that the field does not significantly penetrate in the coins and the signals of the coils are not significantly influenced by the composition of the material of the coin and are mainly dependent on the thickness thereof.
  • the first one consists of integrating the coil on an oscillator circuit.
  • the changes in inductance of the coil are mainly translated into changes in the oscillation frequency, whereas the changes in resistance fundamentally cause changes in the oscillation amplitude.
  • the second one is based on applying an alternating current (or voltage) with a constant value to the coil, measuring the changes in voltage (or current), and calculating from these data the changes in impedance of the coil.
  • coin selectors including several pairs of inductive sensors, e.g. EP 1 172 772 where each one is constituted of a coil located on one side of the coin pass channel and another second facing coil on the other side of the channel, for the purpose of having several configurations of sensors providing different coin characterizations.
  • European patent EP-0599844-B1 discloses a device which uses a single coil pair and switching means for changing the electric configuration of the coils as the coin passes through the sensors, such that different tests are carried out on the coin from among a series of tests controlled by the different operation states of the switching means.
  • the invention refers to a device and method for discriminating coins, and to a coin selector including said device.
  • a first embodiment of the device for discriminating coins is defined in independent claim 1.
  • each pair of inductive sensors can be placed at different heights, each pair comprising two facing inductive sensors, one on each side of the coin pass channel, such that each pair interferes in a different area of the coin, returning a signal which is characteristic of said area.
  • the excitation means are preferably configured so as to work cyclically, such that the period of said cycle is less than the time it takes any coin to travel a distance equal to half the radius of the inductive sensor, to thus be able to reconstruct the signals of the sensors in each one of the operation modes in at least one span of the coin track as it passes through the first and second sensors, with no significant loss of information; in other words, the operation mode change frequency is significantly greater than the speed of the coin, this change frequency being quick enough in comparison to the coin speed.
  • the calculation of the resistance and inductance is preferably carried out from the measurements of the voltage phase and amplitude and the current passing through the two inductive sensors in each one of the modes in which said sensors are excited.
  • the device of the invention preferably includes two capacitors, each one connected in series or in parallel with each inductive sensor, such that the ratio between the reactance and resistance variation of each inductive sensor in the presence of a coin increases with regard to the module of their impedance in the absence of the coin.
  • the device for discriminating coins of the invention can also include at least two resistances r 1 , r 2 , each one connected in series with each inductive sensor, for the purpose of increasing the damping coefficient of the circuit.
  • the present invention significantly compensates the distance change effect from the coin to the sensors due to lift-off and tilt on the change values in phase and counterphase inductance and resistance with said compensation terms in at least one span of the coin track as it passes through said sensors.
  • Compensating the lift-off and tilt effects implies an improvement of the discrimination quality of the selectors and it opens up the possibility of new applications in which it is impossible to stabilize the coin, for example coin selectors in public transportation vehicles, or selectors with coin in free fall.
  • a second embodiment of the device for discriminating coins is defined in independent claim 5.
  • the present invention also provides a device and method for compensating the effect of the change in the distance of the coin to the sensors due to the variation in the distance between sensors, such that the compensated phase and counterphase resistance and inductance measurements, corresponding to a fixed nominal spacing between sensors, are obtained.
  • This distance is common for all manufactured selectors, regardless of which is the real distance between sensors in each selector and of whether this distance changes once the selector has been calibrated.
  • Compensating the channel width implies obtaining a greater uniformity in the manufacturing of selectors, which facilitates their calibration, lowers the clearance-free requirements in designing and manufacturing selectors and making it insensitive to conditions of aging, wear or a change in the environmental conditions affecting the spacing between the sensors. This all implies an additional improvement in the discrimination quality.
  • the present invention also provides a method for discriminating coins as defined in independent claim 6
  • Two excitation modes may be used, consisting of the individual excitation of each one of the coils; in other words, the operation modes (A) and (B).
  • a second embodiment defined a method for discriminating coin as defined in independent claim 10.
  • the invention also refers to a coin selector comprising an inlet for the coins and a casing defining a pass channel for the coins, and further comprising any of the previously described embodiments of the device for discriminating coins.
  • the track of a coin 3 runs between and inlet and one or more outlets.
  • the coin rolls along a coin channel 8 defined by the walls 4 and 5 and the rolling ramp 6.
  • a first coil 1 and a second coil 2 facing each other, such that their rotation axes 7 coincide.
  • Figure 2 shows the coin 3, with thickness "e”, as it passes between the first coil 1 and second coil 2, spaced by a distance "c".
  • the relative position between coin and sensors is defined by distances d 1 , d 2 , d 3 and d 4 . Depending on how these distances vary, there are lift-off, tilt variations or changes in the spacing between sensors.
  • the lift-off variation occurs when, keeping the distance between sensors "c" constant, the distances d 1 and d 2 vary in the same manner.
  • the change causing this variation in the sensors is known as the lift-off effect.
  • the tilt of the coin occurs when, keeping the distance between sensors "c" constant, and the distances d 1 and d 2 , distances d 3 and d 4 vary, such that the angle formed by the axis of the sensors 7 and the rotation axis of the coin varies.
  • a change occurs in the channel width when the distance between sensors "c" changes, such that, for example, d 1 and d 3 are kept constant and d 2 and d 4 vary in the same manner.
  • the block diagram of figure 3 shows the impedances Z 1 and Z 2 of the coils 1 and 2, respectively, which interact between one another and with the coin 3, such that there is a mutual impedance Z M .
  • the coils are excited by applying a voltage generated by a voltage source Vs through the resistances Rs 1 and Rs 2 Depending on the state of the switches 12 and 13, said voltage can be applied to each one of the coils separately or to both simultaneously.
  • the switch 12 is open, the impedance Z 1 associated with the first coil 1 is short-circuited through the resistance Rs 1 .
  • the switch 13 the impedance Z 2 associated with the second coil 2 and the resistance Rs 2 . This change in the excitation of the coils is carried out without changing their electric configuration.
  • modes A and B are used, consisting of the individual excitation of each one of the coils 1 and 2, respectively.
  • the phase configuration is the result of adding the self-resistances and self-inductances, the mutual resistances and mutual inductances, respectively.
  • the counterphase configuration is the result of subtracting the mutual resistances and mutual inductances from the sum of self-resistances and self-inductances, respectively.
  • the position of the coin 3 with regard to the coils 1 and 2 can be expressed as a function of its offsetting, understood as the distance "x" of the plane 18, located equally spaced from both sensors to the center of the coin, this value being positive when the coin 3 is closer to coil 2 than to coil 1 (as shown in figure 2 ).
  • BOB ⁇ 1 D 1 exp - k 1 ⁇ x
  • BOB ⁇ 2 D 2 exp k 2 ⁇ x
  • D 1 A 1 exp - 0.5 ⁇ k 1 ⁇ c - e
  • D 2 A 2 exp - 0.5 ⁇ k 2 ⁇ c - e
  • the compensation is obtained directly from the self-resistance and self-inductance variations of each coil. All measurements are carried out at a same working frequency.
  • Figure 6 shows on curve 19 the variation in the phase inductance depending on the offsetting of a coin with regard to the sensors (lift-off) when the sensors are measuring the central region of the coin.
  • curve 20 the same inductance is shown once the compensation term is applied. It can be seen how the variation of said measurement is greatly attenuated with the lift-off.
  • Figure 7 shows on curve 21 the variation in the phase inductance depending on the rotation of a coin with regard to the sensors (tilt) when the sensors are measuring the central region of the coin.
  • Curve 22 shows the same inductance once the compensation term is applied. It can be seen how the variation of said measurement is greatly attenuated with the tilt of the coin. Therefore, it is verified that the lift-off compensation model is also valid for compensating the tilt of the coin.
  • Figure 8 shows the evolution of the inductive coupling coefficient (M), whose expression is reflected in equation [18], with the distance between sensors. It is easy to find a function relating both variables, such that once the coupling is known, the distance between the sensors can be estimated.
  • M L M L 1 ⁇ L 2
  • the function relating the inductive coupling to the perpendicular distance between two coils is approximated by a line.
  • Curve 27 of figure 9 shows the phase inductance change values of the central region of a coin depending on the distance between sensors.
  • Curve 28 shows the inductance change values after compensating said distance, such that values corresponding to a nominal distance between sensors are obtained.

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

Claims (11)

  1. Gerät zur Unterscheidung von Münzen. Es besteht aus
    - eine Schiene, an der die Münze entlang verläuft
    - mindestens ein Paar von induktiven Sensoren, gebildet aus einen ersten induktiven Sensor (1) und einen zweiten induktiven Sensor (2), die einander auf jeder Seite der Münzenschiene zugewandt sind,
    dadurch gekennzeichnet, dass das Gerät außerdem:
    - Ansteuerungsmittel des ersten und des zweiten Sensors (1, 2) so aufgebaut, dass beide auf der gleichen Anregungsfrequenz unter 500 kHz in mindestens zwei verschiedenen Betriebsarten unter den folgenden Betriebsarten funktionieren:
    (A) nur der erste induktive Sensor anreizen,
    (B) nur der zweite induktive Sensor anreizen,
    (C) beide induktive Sensoren (der erste und der zweite) anreizen, sodass ihre elektromagnetischen Felder hinzugefügt (in der Anordnungsphase) oder subtrahiert (gegenphasige Anordnung) werden, oder dass sie keine bekannte Phasenverschiebung besitzen,
    - Durchführungsmittel für jeder Betriebsart der ersten Messungen der Spannung und der Intensität in der Amplitude und Phase des ersten induktiven Sensor (1),
    - Durchführungsmittel für jeder Betriebsart der zweiten Messungen der Spannung und der Intensität in der Amplitude und Phase des zweiten induktiven Sensor (2)
    - Berechnungsmittel, für jede verwendete Betriebsart, der Widerstands- (R) und Induktivitätsänderung (L) in jeder der induktiven Sensoren in Bezug auf ihren Wert bei Abwesenheit einer Münze aus der ersten und der zweiten Messung
    - Berechnungsmittel eines Änderungswert des Kompensationsterms (Δz1R) für jede Phase und Gegenphase anhand der Änderungswerte der Selbstwiderstände jedes induktiven Sensor
    - Berechnungsmittel eines Änderungswert des Kompensationsterms (Δz1L) für jede Phase und Gegenphase anhand der Änderungswerte der Eigeninduktivitäten jedes induktiven Sensor
    - Anlegungsmittel der Ausgleichsausdrücke (Δz1R, Δz1L) hinsichtlich der Phase und/oder Gegenphase der Konfigurationsmessungen (z), so dass es zumindest die Auswirkung der Abstandsänderung der Münze in Bezug auf die Sensoren teilweise ausgleicht durch Abheben und Kippen der Änderungswerte von der Phase und Gegenphase in Widerstand und Induktivität in zumindest einer Spannweite der Münzlaufbahn beim Durchlaufen der Sensoren
  2. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß die Ansteuerungsmittel für eine zyklische Arbeitsweise konfiguriert sind, so dass die Zeitdauer des Zyklus kleiner ist als die Zeit, die eine Münze braucht, um einen Abstand gleich der Hälfte des Radius des induktiven Sensors zurückzulegen. Das Gerät ist in der Lage, die Signale der Sensoren in jeder der Betriebsarten in mindestens einer Spannweite von der Münzenspur auszubauen, während es durch den ersten und zweiten Sensoren ohne einen bedeutsamen Informationsverlust durchläuft.
  3. Gerät nach dem vorherigen Ansprüche dadurch gekennzeichnet, dass die Vorrichtung jeweiligen Kondensatoren umfasst, die in Reihe oder parallel zu den induktiven Sensoren verbunden sind, so dass das Verhältnis zwischen der Reaktanz und Widerstandsänderung jedes Induktiv-Sensor in der Anwesenheit einer Münze erhöht wird, hinsichtlich des Betrags der Impedanz in Abwesenheit einer Münze.
  4. Gerät nach dem vorherigen Ansprüche dadurch gekennzeichnet, dass die Vorrichtung jeweiligen Widerstände (r1, r2) enthält, die miteinander in Reihe mit den induktiven Sensoren (1, 2) verbunden sind und dazu dienen, der Dämpfungskoeffizient der Schaltung zu erhöhen.
  5. Gerät zur Unterscheidung von Münzen. Es besteht aus
    - eine Schiene, an der die Münze entlang verläuft
    - mindestens ein Paar von induktiven Sensoren, gebildet aus einen ersten induktiven Sensor (1) und einen zweiten induktiven Sensor (2), die einander auf jeder Seite der Münzenschiene zugewandt sind,
    dadurch gekennzeichnet, dass das Gerät außerdem:
    - Ansteuerungsmittel des ersten und des zweiten Sensors (1, 2) so aufgebaut, dass beide auf der gleichen Anregungsfrequenz unter 500 kHz in mindestens zwei verschiedenen Betriebsarten unter den folgenden Betriebsarten funktionieren:
    (A) nur der erste induktive Sensor anreizen
    (B) nur der zweite induktive Sensor anreizen
    (C) beide induktive Sensoren (der erste und der zweite) anreizen, sodass ihre elektromagnetischen Felder hinzugefügt (in der Anordnungsphase) oder subtrahiert (gegenphasige Anordnung) werden, oder dass sie keine bekannte Phasenverschiebung besitzen.
    - Durchführungsmittel für jeder Betriebsart der ersten Messungen der Spannung und der Intensität in der Amplitude und Phase des ersten induktiven Sensor (1)
    - Durchführungsmittel für jeder Betriebsart der zweiten Messungen der Spannung und der Intensität in der Amplitude und Phase des zweiten induktiven Sensor (2)
    - Berechnungsmittel der gegenseitigen Induktivität (LM) zwischen den ersten und zweiten induktiven Sensoren in Abwesenheit einer Münze aus der ersten und der zweiten Messung
    - Berechnungsmittel der Eigeninduktivitäten (L1, L2) für jedes der induktiven Sensoren in Abwesenheit einer Münze aus der ersten und der zweiten Messung
    - Berechnungsmittel eines Kopplungskoeffizienten (M) der Gegeninduktivität (LM) und Eigeninduktivitäten (L1, L2)
    - Berechnungsmittel des effektiven Abstandes zwischen der ersten und zweiten induktiven Sensoren von der Kopplungskoeffizient (M)
    - Anlegungsmittel der Ausgleichsausdrücke (Δz2) hinsichtlich der Phase und/oder Gegenphase der Konfigurationsmessungen (z), so dass es zumindest die Wirkung auf den Messungen korrigiert, Aufgrund einiger Abstandsveränderungen der Münze an den Sensoren oder zwischen den Sensoren in mindestens einer Spannweite der Münzlaufbahn beim Durchlaufen der Sensoren,
    und so dass die Phase und Gegenphase der Konfigurationsmessungen (z) an dem aufgebrachten Ausgleichsausdrücke (Δz2) sind solche, die einen Nominalabstand zwischen den induktiven Sensoren zeigen.
  6. Gerät zur Unterscheidung von Münzen. Es besteht aus
    - wenigstens einen ersten induktiven Sensor (1) und einen zweiten induktiven Sensor (2) einander angeordnet auf jeder Seite einer Spur wobei eine Münze entlang verläuft mit einem Eingang und einen oder mehrere Ausgänge,
    dadurch gekennzeichnet, dass es aus folgendes besteht:
    - Ansteuerung mit derselben Anregungsfrequenz unter 500 kHz um bezeichnende Messungen der Materialien und Konstruktionsmerkmale der Münze bereitzustellen, wobei der erste und zweite Sensor in mindestens zwei verschiedenen Betriebsarten unter den folgenden Betriebsarten funktionieren:
    (A) nur der erste induktive Sensor anreizen
    (B) nur der zweite induktive Sensor anreizen
    (C) beide induktive Sensoren (der erste und der zweite) anreizen, sodass ihre elektromagnetischen Felder hinzugefügt (in der Anordnungsphase) oder subtrahiert (gegenphasige Anordnung) werden, oder dass sie keine bekannte Phasenverschiebung besitzen.
    - Durchführungsmittel für jeder Betriebsart der ersten Messungen der Spannung und der Intensität in der Amplitude und Phase des ersten induktiven Sensor (1)
    - Durchführungsmittel für jeder Betriebsart der zweiten Messungen der Spannung und der Intensität in der Amplitude und Phase des zweiten induktiven Sensor (2)
    - Berechnung, für jede verwendete Betriebsart, der Widerstands- (R) und Induktivitätsänderung (L) in jeder der induktiven Sensoren in Bezug auf ihren Wert bei Abwesenheit einer Münze aus der ersten und der zweiten Messung
    - Berechnung eines Änderungswert des Kompensationsterms (Δz1R) für jede Phase und Gegenphase anhand der Änderungswerte der Selbstwiderstände jedes induktiven Sensor
    - Berechnung eines Änderungswert des Kompensationsterms (Δz1L) für jede Phase und Gegenphase anhand der Änderungswerte der Eigeninduktivitäten jedes induktiven Sensor
    - Anwendung der Ausgleichsausdrücke (Δz1R, Δz1L) hinsichtlich der Phase und/oder Gegenphase der Konfigurationsmessungen (z), so dass es zumindest die Auswirkung der Abstandsänderung der Münze in Bezug auf die Sensoren teilweise ausgleicht durch Abheben und Kippen der Änderungswerte von der Phase und Gegenphase in Widerstand und Induktivität in zumindest einer Spannweite der Münzlaufbahn beim Durchlaufen der Sensoren
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß es - zyklische Erregung der Betriebsarten, so dass die Zeitdauer des Zyklus kleiner ist als die Zeit, die eine Münze braucht, um einen Abstand gleich der Hälfte des Radius des induktiven Sensors zurückzulegen. Das Gerät ist in der Lage, die Signale der Sensoren in jeder der Betriebsarten in mindestens einer Spannweite von der Münzenspur auszubauen, während es durch den ersten und zweiten Sensoren ohne einen bedeutsamen Informationsverlust durchläuft.
  8. Verfahren nach Ansprüche 6-7, dadurch gekennzeichnet, daß die Betriebsarten (A) und (B) verwendet werden.
  9. Verfahren nach Ansprüche 6-7, dadurch gekennzeichnet, daß die Betriebsarten, (A) und die Anregung der ersten und zweiten induktiven Sensoren verwendet werden, sodass ihre elektromagnetischen Felder hinzugefügt (in der Anordnungsphase) oder subtrahiert (gegenphasige Anordnung) werden.
  10. Verfahren zur Unterscheidung von Münzen. Es besteht aus
    - wenigstens einen ersten induktiven Sensor (1) und einen zweiten induktiven Sensor (2) einander angeordnet auf jeder Seite einer Spur wobei eine Münze (3) entlang verläuft mit einem Eingang und einen oder mehrere Ausgänge,
    dadurch gekennzeichnet, dass es aus folgendes besteht:
    - Ansteuerung mit derselben Anregungsfrequenz unter 500 kHz um bezeichnende Messungen der Materialien und Konstruktionsmerkmale der Münze bereitzustellen, wobei der erste und zweite Sensor in mindestens zwei verschiedenen Betriebsarten unter den folgenden Betriebsarten funktionieren:
    (A) nur der erste induktive Sensor anreizen
    (B) nur der zweite induktive Sensor anreizen
    (C) beide induktive Sensoren (der erste und der zweite) anreizen, sodass ihre elektromagnetischen Felder hinzugefügt (in der Anordnungsphase) oder subtrahiert (gegenphasige Anordnung) werden, oder dass sie keine bekannte Phasenverschiebung besitzen.
    - Durchführung für jeder Betriebsart der ersten Messungen der Spannung und der Intensität in der Amplitude und Phase des ersten induktiven Sensor (1)
    - Durchführung für jeder Betriebsart der zweiten Messungen der Spannung und der Intensität in der Amplitude und Phase des zweiten induktiven Sensor (2)
    - Berechnung der gegenseitigen Induktivität (LM) zwischen den ersten und zweiten induktiven Sensoren in Abwesenheit einer Münze aus der ersten und der zweiten Messung
    - Berechnung der Eigeninduktivitäten (L1, L2) für jedes der induktiven Sensoren in Abwesenheit einer Münze aus der ersten und der zweiten Messung
    - Berechnung eines Kopplungskoeffizienten (M) der Gegeninduktivität (LM) und Eigeninduktivitäten (L1, L2)
    - Berechnung des effektiven Abstandes zwischen der ersten und zweiten induktiven Sensoren von der Kopplungskoeffizient (M)
    - Berechnung eines Kompensationsterms (Δz2) anhand des effektiven Abstandes
    - Anwendung des Kompensationsterms (Δz2) für die Phase und/oder Gegenphase der Konfigurationsmessungen (z),
    so dass es zumindest die Wirkung auf den Messungen teilweise korrigiert, Aufgrund einiger Abstandsveränderungen der Münze an den Sensoren oder zwischen den Sensoren in mindestens einer Spannweite der Münzlaufbahn beim Durchlaufen der Sensoren,
    und so dass die Phase und Gegenphase der Konfigurationsmessungen (z) an dem aufgebrachten Ausgleichsausdrücke (Δz2) sind solche, die einen Nominalabstand zwischen den induktiven Sensoren zeigen.
  11. Münzsortierer mit einem Einlass für Münzen und eine Hülle mit Münzendurchgang, dadurch gekennzeichnet, dass es sich um eine Vorrichtung zur Unterscheidung von Münzen nach einem der Ansprüche 1 bis 5 handelt.
EP03380018.6A 2003-01-31 2003-01-31 Verfahren und Vorrichtung zum Unterscheiden von Münzen Expired - Lifetime EP1445739B1 (de)

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ES03380018T ES2431547T3 (es) 2003-01-31 2003-01-31 Dispositivo y método para la discriminación de monedas
EP03380018.6A EP1445739B1 (de) 2003-01-31 2003-01-31 Verfahren und Vorrichtung zum Unterscheiden von Münzen

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EP03380018.6A EP1445739B1 (de) 2003-01-31 2003-01-31 Verfahren und Vorrichtung zum Unterscheiden von Münzen

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EP1445739B1 true EP1445739B1 (de) 2013-07-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3287991A1 (de) 2017-07-11 2018-02-28 Azkoyen, S.A. Münzsensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109557167A (zh) * 2018-10-26 2019-04-02 东莞市华盾电子科技有限公司 一种金属分类探测的标定方法及系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9117849D0 (en) * 1991-08-19 1991-10-09 Coin Controls Coin discrimination apparatus
GB2310070B (en) * 1996-02-08 1999-10-27 Mars Inc Coin diameter measurement
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.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3287991A1 (de) 2017-07-11 2018-02-28 Azkoyen, S.A. Münzsensor
US10262487B2 (en) 2017-07-11 2019-04-16 Azkoyen, S.A. Coin sensor

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EP1445739A1 (de) 2004-08-11
ES2431547T3 (es) 2013-11-26

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