EP1233380B1 - Method of detecting the actuation of a coin return mechanism in a coin testing arrangement - Google Patents

Method of detecting the actuation of a coin return mechanism in a coin testing arrangement Download PDF

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Publication number
EP1233380B1
EP1233380B1 EP20020001303 EP02001303A EP1233380B1 EP 1233380 B1 EP1233380 B1 EP 1233380B1 EP 20020001303 EP20020001303 EP 20020001303 EP 02001303 A EP02001303 A EP 02001303A EP 1233380 B1 EP1233380 B1 EP 1233380B1
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EP
European Patent Office
Prior art keywords
coin
attenuation
curves
actuation
return mechanism
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
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EP20020001303
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German (de)
French (fr)
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EP1233380A2 (en
EP1233380A3 (en
Inventor
Arne Wischnath
Rolf Arndt
Hans-Ulrich Cohrs
Wilfried Meyer
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Crane Payment Innovations GmbH
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National Rejectors Inc GmbH
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Publication of EP1233380A3 publication Critical patent/EP1233380A3/en
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Publication of EP1233380B1 publication Critical patent/EP1233380B1/en
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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 invention relates to a method for operating a coin validator with a coin return mechanism in coin validators according to the preamble of patent claim 1.
  • the so-called career support plate which forms a wall of the coin channel through which run the coins to be tested in Münzprüfer along wegschwenkbar designed so that trapped coins or in a Münzstau the coins can be discharged to a return channel.
  • a so-called return lever which is either mechanically by hand or electromechanically actuated. It is desirable to monitor the operation of an automaton when a signal is sent to the coin validator computer as soon as the return is actuated. On the one hand, the coin acceptance is stopped over here until the raceway carrier plate is swung back, on the other hand, the return signal serves as a jamming signal. A frequent occurrence of the return signal is an indication that there is a disturbance. It then needs the remedy.
  • Out DE 197 26 449 has become known a method for testing coins with an inductively operating sensor assembly having a primary and a secondary coil, between which passes through the coin to be tested.
  • the transmission signal is divided into a number of switching steps in periodically recurring sections, and envelopes are formed from the values of the reception signal of the secondary coil at the switching steps repeating the frequency of the transmission signal.
  • An evaluation device forms from the number of concurrently generated envelopes at least one criterion for the purpose of generating the acceptance signal.
  • the known method is based on the recognition that in a field at different frequency different attenuations caused by a coin. Deeper frequencies cause the field to extend completely or substantially through the coin, while higher frequencies result in a so-called skin effect, ie the field only minimally penetrates the coin. With different frequencies, therefore, different properties of the coins can be measured, for example the thickness of the coins with lower frequencies and a stamping image with higher frequencies.
  • the invention has for its object to provide a method for operating a Münzprüers, in which only one probe is sufficient to produce a hinting on the operation of the return mechanism return signal and the return signal is generated relatively quickly and even with small changes in distance.
  • the method according to the invention is based on the knowledge that the maximums of two or more damping curves (envelopes in the above sense) are different, depending on whether the attenuation by a coin or by the fact that the career support was swung away. In the latter case, the attenuation curves (measured value or signal course) are relatively close in their course and would ideally coincide, while different maxima occur when a coin passes through at different frequencies. This phenomenon makes use of the invention. First, it is determined whether the probe at all a measurement signal or two or more measuring signals. This is preferably done in that the exceeding of a predetermined threshold value is determined. Thereafter, two or more attenuation curves are set in relation to each other via maxima. As already mentioned, their relationship is different depending on whether there is a cushioning by a coin or by operating the return lever. A return signal is generated when the difference of the maxima is less than a predetermined value.
  • the principle of measurement which is used in the method to be described, is based on DE 15726449 , known. It is expressly referred to this prior art. It is based on the recognition that at different frequencies of a magnetic field different losses are caused by the passage of a coin through the field. As mentioned above, it does not matter if the field is between a primary or a secondary coil or is generated by a coil assembly located on one side of the coin channel.
  • the causative or transmit signal which is preferably a square or triangular signal, is divided by suitable means into a number of switching steps. Since the causative or transmission signal is a periodic signal, this division takes place again and again.
  • the difference between the maxima makes it possible to easily determine whether the measured damping curves are caused by the actuation of the return lever or by the passage of a coin.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Description

Die Erfindung bezieht sich auf ein Verfahren zum Betrieb eines Münzprüfers mit einem Münzrückgabemechanismus in Münzprüfern nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for operating a coin validator with a coin return mechanism in coin validators according to the preamble of patent claim 1.

Üblicherweise ist die sogenannte Laufbahnträgerplatte, die eine Wand des Münzkanals bildet, durch welche die zu prüfenden Münzen im Münzprüfer entlang laufen, wegschwenkbar ausgebildet, damit eingeklemmte Münzen oder bei einem Münzstau die Münzen zu einem Rückgabekanal abgeführt werden können. Zur Betätigung der schwenkbaren Laufbahnträgerplatte dient zumeist ein sogenannter Rückgabehebel, der entweder mechanisch von Hand oder elektromechanisch betätigbar ist. Es ist zur Überwachung des Betriebes eines Automaten wünschenswert, wenn dem Rechner des Münzprüfers ein Signal geliefert wird, sobald die Rückgabe betätigt ist, bzw. betätigt wurde. Zum einen wird hierüber die Münzannahme solange gestoppt, bis die Laufbahnträgerplatte zurückgeschwenkt ist, zum anderen dient das Rückgabesignal als Störsignal. Ein häufiges Auftreten des Rückgabesignals ist ein Indiz dafür, daß eine Störungen vorliegt. Es bedarf dann der Abhilfe.Usually, the so-called career support plate, which forms a wall of the coin channel through which run the coins to be tested in Münzprüfer along wegschwenkbar designed so that trapped coins or in a Münzstau the coins can be discharged to a return channel. For actuating the pivotable track carrier plate is usually a so-called return lever, which is either mechanically by hand or electromechanically actuated. It is desirable to monitor the operation of an automaton when a signal is sent to the coin validator computer as soon as the return is actuated. On the one hand, the coin acceptance is stopped over here until the raceway carrier plate is swung back, on the other hand, the return signal serves as a jamming signal. A frequent occurrence of the return signal is an indication that there is a disturbance. It then needs the remedy.

Es ist bekannt, bei Betätigung der Laufbahnträgerplatte bzw. des Rückgabehebels einen Schalter zu betätigen, der das Rückgabesignal erzeugt. Hierin liegt jedoch ein gewisser Aufwand begründet. Es ist daher aus der DE 42 24 104 auch bekannt geworden, ein Rückgabesignal dadurch zu gewinnen, daß die Signale der Meßsonden der Münzprüfer ausgenutzt werden. Diese sind normalerweise induktiv arbeitend und das Signal, das erzeugt wird, wenn die Laufbahnträgerplatte fortgeschwenkt wird, ist ein anderes als beim Durchlauf einer Münze. Aus der bereits erwähnten Druckschrift erfolgt die Ableitung des Rückgabesignals dadurch, daß von mindestens zwei Meßsonden die Meßsignale erfaßt und miteinander kombiniert werden.It is known to actuate a switch upon actuation of the track support plate or the return lever, which generates the return signal. Herein, however, a certain expense is justified. It is therefore out of the DE 42 24 104 also become known to win a return signal in that the signals of the probes of Münzprüfer be exploited. These are usually inductively working and the signal that is generated when the Running track plate is another than when passing a coin. From the above-mentioned document, the derivative of the return signal takes place in that detected by at least two probes, the measurement signals and combined with each other.

Aus DE 197 26 449 ist ein Verfahren zur Prüfung von Münzen mit einer induktiv arbeitenden Sensoranordnung bekannt geworden, die eine Primär- und eine Sekundärspule aufweist, zwischen denen die zu prüfende Münze hindurchläuft. Das Sendesignal wird in periodisch wiederkehrenden Abschnitten in eine Anzahl von Schaltschritten unterteilt, und von den Werten des Empfangssignals der Sekundärspule werden bei den hier sich mit der Frequenz des Sendesignals wiederholenden Schaltschritten Hüllkurven gebildet. Eine Auswertevorrichtung bildet aus der Anzahl der zeitgleich erzeugten Hüllkurven mindestens ein Kriterium zwecks Erzeugung des Annahmesignals. Das bekannte Verfahren beruht auf der Erkenntnis, daß in einem Feld bei unterschiedlicher Frequenz unterschiedliche Dämpfungen durch eine Münze bewirkt werden. Tiefere Frequenzen bewirken, daß sich das Feld vollständig oder weitgehend durch die Münze hindurch erstreckt, während höhere Frequenzen zu einem sogenannten Skineffekt führen, d.h. das Feld dringt nur minimal in die Münze ein. Mit unterschiedlichen Frequenzen können daher unterschiedliche Eigenschaften der Münzen gemessen werden, beispielsweise die Dicke der Münzen mit kleineren Frequenzen und ein Prägebild mit höheren Frequenzen.Out DE 197 26 449 has become known a method for testing coins with an inductively operating sensor assembly having a primary and a secondary coil, between which passes through the coin to be tested. The transmission signal is divided into a number of switching steps in periodically recurring sections, and envelopes are formed from the values of the reception signal of the secondary coil at the switching steps repeating the frequency of the transmission signal. An evaluation device forms from the number of concurrently generated envelopes at least one criterion for the purpose of generating the acceptance signal. The known method is based on the recognition that in a field at different frequency different attenuations caused by a coin. Deeper frequencies cause the field to extend completely or substantially through the coin, while higher frequencies result in a so-called skin effect, ie the field only minimally penetrates the coin. With different frequencies, therefore, different properties of the coins can be measured, for example the thickness of the coins with lower frequencies and a stamping image with higher frequencies.

Aus EP-A-0 509 146 ist bekannt geworden, eine Betätigung des Rückgabemechanismus mit Hilfe von zwei räumlich nacheinander angeordneten Meßspulenpaaren zu erfassen, deren Dämpfungskurven beim Durchlauf einer Münze einen zeitlichen Versatz haben, bei Betätigung des Rückgabehebels hingegen nicht.Out EP-A-0 509 146 It has become known to detect an actuation of the return mechanism by means of two spatially successively arranged Meßspulenpaaren whose damping curves have a temporal offset during the passage of a coin, however, not on actuation of the return lever.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Betrieb eines Münzprüfers anzugeben, bei dem nur eine Meßsonde ausreicht, um ein auf die Betätigung des Rückgabemechanismus hinweisendes Rückgabesignal zu erzeugen und das Rückgabesignal relativ schnell und schon bei geringen Abstandsänderungen erzeugt wird.The invention has for its object to provide a method for operating a Münzprüers, in which only one probe is sufficient to produce a hinting on the operation of the return mechanism return signal and the return signal is generated relatively quickly and even with small changes in distance.

Die Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.The object is solved by the features of patent claim 1.

Bei dem erfindungsgemäßen Verfahren wird von der Erkenntnis ausgegangen, daß die Maxima von zwei oder mehr Dämpfungskurven (Hüllkurven im obigen Sinne) unterschiedlich sind, je nach dem ob die Dämpfung durch eine Münze oder dadurch erfolgt, daß der Laufbahnträger weggeschwenkt wurde. Im letzteren Fall liegen die Dämpfungskurven (Meßwert- bzw. Signalverlauf) in ihrem Verlauf relativ nahe zusammen und müßten im Idealfall zusammenfallen, während beim Durchlauf einer Münze bei unterschiedlichen Frequenzen unterschiedliche Maxima auftreten. Dieses Phänomen macht sich die Erfindung zu Nutze. Zunächst wird festgestellt, ob die Meßsonde überhaupt ein Meßsignal bzw. zwei oder mehr Meßsignale feststellt. Dies geschieht vorzugsweise dadurch, daß die Überschreitung eines vorgegebenen Schwellwerts ermittelt wird. Danach werden zwei oder mehr Dämpfungskurven über Maxima in Beziehung zueinander gesetzt. Wie schon erwähnt, ist ihre Beziehung eine andere je nach dem ob eine Dämpfung durch eine Münze oder durch Betätigung des Rückgabehebels erfolgt. Ein Rückgabesignal wird erzeugt, wenn die Differenz der Maxima kleiner als ein vorgegebener Wert ist.In the method according to the invention is based on the knowledge that the maximums of two or more damping curves (envelopes in the above sense) are different, depending on whether the attenuation by a coin or by the fact that the career support was swung away. In the latter case, the attenuation curves (measured value or signal course) are relatively close in their course and would ideally coincide, while different maxima occur when a coin passes through at different frequencies. This phenomenon makes use of the invention. First, it is determined whether the probe at all a measurement signal or two or more measuring signals. This is preferably done in that the exceeding of a predetermined threshold value is determined. Thereafter, two or more attenuation curves are set in relation to each other via maxima. As already mentioned, their relationship is different depending on whether there is a cushioning by a coin or by operating the return lever. A return signal is generated when the difference of the maxima is less than a predetermined value.

Die Erfindung wird nachfolgend anhand von beispielhaft dargestellten Zeichnungen näher erläutert.

Fig. 1
zeigt ein Diagramm von Dämpfungskurven beim Einwurf einer Münze.
Fig. 2
zeigt stark vergrößert die Dämpfungskurven beim Öffnen der Laufbahnträgerplatte bzw. bei Betätigung des Rückgabehebels.
The invention will be explained in more detail with reference to drawings shown by way of example.
Fig. 1
shows a diagram of damping curves when inserting a coin.
Fig. 2
shows greatly enlarged the damping curves when opening the track support plate or upon actuation of the return lever.

Das Meßprinzip, das bei dem zu beschreibenden Verfahren zugrunde gelegt ist, ist aus der DE 15726449 , bekannt. Es wird ausdrücklich auf diesen Stand der Technik Bezug genommen. Er geht von der Erkenntnis aus, daß bei unterschiedlichen Frequenzen eines magnetischen Feldes unterschiedliche Dämpfungen beim Durchlauf einer Münze durch das Feld verursacht werden. Wie weiter oben schon erwähnt, spielt keine Rolle, ob das Feld sich zwischen einer Primär- oder einer Sekundärspule befindet oder von einer Spulenanordnung erzeugt wird, welche auf einer Seite des Münzkanals angeordnet ist. Das verursachende oder Sendesignal, das vorzugsweise ein Rechteck- oder ein Dreiecksignal ist, wird mit geeigneten Mitteln in eine Anzahl von Schaltschritten unterteilt. Da das verursachende oder Sendesignal ein periodisches Signal ist, findet diese Unterteilung immer wieder statt. Im auszuwertenden oder Empfangssignal werden dann synchron zu den Schaltschritten Messungen vorgenommen, und aus den Messungen werden Hüllkurven gebildet, welche mithin die Dämpfungskurven für die unterschiedlichen Frequenzen darstellen. So ist es möglich, mit Hilfe einer Spulenanordnung und einer Münze neun oder mehr Dämpfungskurven zu erzeugen, die mehr oder weniger stark in ihrem Verlauf voneinander abweichen, wie dies durch die Kurven 1 bis 9 in Fig. 1 angedeutet ist. Wie erkennbar haben die Dämpfungskurven 1 bis 9 unterschiedliche Anstiegsflanken und unterschiedliche Maxima. Es ist daher möglich, mit Hilfe einer Sonde oder einer Spulenanordnung verschiedene Eigenschaften einer Münze zu ermitteln. Es bedarf mithin nicht einer Vielzahl von Sonden, um die verschiedenen Eigenschaften darzustellen.The principle of measurement, which is used in the method to be described, is based on DE 15726449 , known. It is expressly referred to this prior art. It is based on the recognition that at different frequencies of a magnetic field different losses are caused by the passage of a coin through the field. As mentioned above, it does not matter if the field is between a primary or a secondary coil or is generated by a coil assembly located on one side of the coin channel. The causative or transmit signal, which is preferably a square or triangular signal, is divided by suitable means into a number of switching steps. Since the causative or transmission signal is a periodic signal, this division takes place again and again. Measurements are then taken in the signal to be evaluated or received in synchronism with the switching steps, and envelopes are formed from the measurements, which thus represent the attenuation curves for the different frequencies. Thus, it is possible with the aid of a coil arrangement and a coin to produce nine or more damping curves, which deviate more or less strongly in their course from each other, as indicated by the curves 1 to 9 in Fig. 1. As can be seen, the damping curves 1 to 9 different rising edges and different maxima. It is therefore possible to determine different properties of a coin with the aid of a probe or a coil arrangement. Thus, it does not take a variety of probes to represent the various properties.

Aus Fig. 2 geht hervor, daß die zeitlich gedehnt gezeichneten einzelnen Kurven 1 bis 9, die mit unterschiedlich langen Strichen oder mit durchgehenden Linien gekennzeichnet sind, annähernd den gleichen Verlauf haben. So ist ihre Steigung annähernd gleich und ihr Maximum. Vergleicht man die Größe der Steigung mit den Werten aus Fig. 1, dann ist ferner zu erkennen, daß sie in Fig. 2 deutlich größer ist. Dies beruht darauf, daß der Öffnungsvorgang der Laufbahnträgerplatte in viel kürzerer Zeit vonstatten geht als der Durchlauf einer Münze, der, wie schon erwähnt, annähernd 50 ms beträgt. Diese Durchlaufzeit ändert sich nicht besonders stark, da die Münze zumeist mit annähernd gleicher Geschwindigkeit durch den Münzkanal rollt oder sich bewegt. Die dabei auftretenden Unterschiede sind nicht so gravierend, daß eine Zeitdauer erhalten würde, wie sie beim Öffnen einer Laufbahnträgerplatte gemäß Fig. 2 auftritt.From Fig. 2 it is apparent that the time-stretched drawn individual curves 1 to 9, which are marked with different lengths strokes or solid lines, have approximately the same course. So their slope is almost equal and their maximum. If one compares the magnitude of the slope with the values from FIG. 1, then it can also be seen that it is significantly larger in FIG. This is due to the fact that the opening operation of the raceway support plate takes much less time than the passage of a coin, which, as already mentioned, is approximately 50 ms. This cycle time does not change very much as the coin usually rolls or moves through the coin channel at approximately the same speed. The differences that occur are not so serious that a period would be obtained, as occurs when opening a track support plate of FIG.

Mithin läßt sich durch die Auswertung der Kurven nach Fig. 1 und 2, erfindungsgemäß durch die Differenz der Maxima, auf einfache Weise bestimmen, ob die gemessenen Dämpfungskurven von der Betätigung des Rückgabehebels oder vom Durchlauf einer Münze verursacht werden.Consequently, by evaluating the curves according to FIGS. 1 and 2, according to the invention, the difference between the maxima makes it possible to easily determine whether the measured damping curves are caused by the actuation of the return lever or by the passage of a coin.

Da nicht nur der Öffnungsvorgang, sondern auch das Offensein einer Laufbahnträgerplatte auf diese Weise ermittelt wird oder ermittelt werden kann, kann zugleich ein entsprechendes Signal auf den Münzprüfer gegeben werden, der über den Mikroprozessor feststellt, daß der Münzprüfer außer Betrieb ist.Since not only the opening process, but also the offensein a career support plate is determined or can be determined in this way, at the same time a corresponding signal can be given to the coin validator, which determines via the microprocessor that the coin validator is out of operation.

Claims (2)

  1. Method for the operation of a coin testing arrangement with a coin channel, through which the coins pass, a coin return mechanism that is opening the coin channel, and a inductively operating measurement sensor with a primary and secondary coil, wherein a transmitted signal of the primary coil is divided in periodically recurring sections into a number of switch steps, and from the values of the received signals of the secondary coil that are temporally associated with the switch steps, attenuation curves (1 to 9) are formed, which correspond to an attenuation of the transmitted signal by a coin passing through an inductively operating measurement sensor with different frequencies, and wherein for the detection of a coin, from at least two of the attenuation curves a criterion is acquired for the acceptance or rejection of a coin, characterized in that initially it is determined whether at least one attenuation curve is present, and a return signal indicating the actuation of the coin return mechanism is created from at least two attenuation curves of the same measurement sensor, if the difference of the maximum values of the attenuation curves is less than a predetermined value.
  2. The method according to Claim 1, characterized in that initially it is determined whether at least one attenuation curve has attained a predetermined threshold.
EP20020001303 2001-02-14 2002-01-18 Method of detecting the actuation of a coin return mechanism in a coin testing arrangement Expired - Lifetime EP1233380B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001106704 DE10106704A1 (en) 2001-02-14 2001-02-14 Method for detecting the operation of a coin return mechanism in coin validators
DE10106704 2001-02-14

Publications (3)

Publication Number Publication Date
EP1233380A2 EP1233380A2 (en) 2002-08-21
EP1233380A3 EP1233380A3 (en) 2005-09-14
EP1233380B1 true EP1233380B1 (en) 2008-01-09

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EP20020001303 Expired - Lifetime EP1233380B1 (en) 2001-02-14 2002-01-18 Method of detecting the actuation of a coin return mechanism in a coin testing arrangement

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DE (2) DE10106704A1 (en)
ES (1) ES2295246T3 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4690263A (en) * 1983-11-08 1987-09-01 Fuji Electric Co., Ltd. Coin refund signal generator
JPH07120453B2 (en) * 1989-02-17 1995-12-20 富士電機株式会社 Coin return signal generator of electronic coin sorter
JP3002904B2 (en) * 1991-04-16 2000-01-24 株式会社日本コンラックス Coin processing equipment
ES2036927B1 (en) * 1991-08-08 1994-02-16 Azkoyen Ind Sa PROCEDURE TO DETECT THE OPERATION OF THE COIN RECOVERY MECHANISM IN COIN SELECTORS.
DE4339543C2 (en) * 1993-11-19 1998-07-23 Nat Rejectors Gmbh Procedure for checking coins
DE19702986C2 (en) * 1997-01-28 1999-06-02 Nat Rejectors Gmbh Coin validator
DE19726449C2 (en) * 1997-06-21 1999-04-15 Nat Rejectors Gmbh Method and circuit arrangement for checking coins

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Publication number Publication date
EP1233380A2 (en) 2002-08-21
EP1233380A3 (en) 2005-09-14
DE10106704A1 (en) 2002-08-29
DE50211493D1 (en) 2008-02-21
ES2295246T3 (en) 2008-04-16

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