EP2335225B1 - Automatic diameter determination of coins - Google Patents
Automatic diameter determination of coins Download PDFInfo
- Publication number
- EP2335225B1 EP2335225B1 EP09744101A EP09744101A EP2335225B1 EP 2335225 B1 EP2335225 B1 EP 2335225B1 EP 09744101 A EP09744101 A EP 09744101A EP 09744101 A EP09744101 A EP 09744101A EP 2335225 B1 EP2335225 B1 EP 2335225B1
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- European Patent Office
- Prior art keywords
- light
- conveyed material
- conveyor
- conveyed
- light sources
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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
- G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation
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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
- G07D5/10—Testing the rim, e.g. the milling of the rim
Definitions
- the invention relates to a device for detecting coins and coin-like conveyed by means of at least one light source for divergent light beam and at least one light detector, and a conveyor for horizontal transport of the separated conveyed material, wherein the conveyor in a detection area between the at least one light source and the at least one light detector
- the invention further relates to a method for detecting coins and coin-like conveyed goods, according to the preamble of claim 10, and at least one light detector has a line-shaped detection area parallel to the conveying direction.
- Such a device is about from the US Pat. No. 6,142,285 known as the closest prior art.
- Generic device for coin recognition are usually based on the use of laser light, since the linear, so parallel propagation of the laser light allows accurate scanning of the conveyed, and thus a simple measurement allowed.
- the conveyed material is moved through one or more laser beams, and obtained from the interruption of the laser beam through the conveyed information that allows identification of the corresponding conveyed.
- the use of laser light in practice also has disadvantages, since the accuracy of the spot-precise measurement is reduced by briefly disturbing influences, such as movements of the conveyed material, or interruptions or impairments of the light beam.
- devices based on laser light also prove to be sensitive to dirt.
- the device according to the invention should be simple in construction and therefore cost-effective.
- Claim 1 refers to a device for detecting coins and coin-like conveyed using at least one light source for diverging light beams and at least one light detector, and a conveyor for horizontal transport of the separated conveyed, wherein the conveyor in a detection area between the at least one light source and the at least one light detector extends, and the at least one light detector has a line-shaped detection region parallel to the conveying direction.
- the conveyor has a centering device for the centric alignment of the conveyed material relative to the line-shaped detection region, and the light detector is designed for a repeated measurement of the irradiated diameter and subsequent averaging.
- diverging light bundles are here understood as light bundles with non-parallel marginal rays, in contrast to laser light with parallel propagation of light, for example, the divergence of the light bundles being of the order of magnitude of the conveyed material to be measured.
- a first group of light sources is arranged so that their respective optical axis is oriented normal to conveyed
- a second group of light sources is arranged so that their respective optical axis obliquely to Conveyed goods is oriented.
- the first group is ideal for determining the diameter of the conveyed material
- the second group for determining the side surface shape of the conveyed material, ie whether the side surface is approximately smooth, knurled or cambered, or how thick the conveyed material is.
- the device is also suitable for the detection of coin-like conveyed material, such as round conveyed with holes, similar to a washer, and thus about to check such objects on inner and outer diameter or offset, since the edge positions are evaluated, and not just the covered area ,
- the light sources are LEDs (light-emitting diodes). Such light sources are inexpensive and durable.
- the at least one light detector is preferably at least one row of photodiodes. In this case, two rows of photodiodes can be provided, which are arranged one behind the other parallel to the conveying direction. If the scanning of the diameter is synchronized, disturbing influences of the movement of the conveyed material can be additionally reduced.
- the conveyor is designed as an inclined conveyor
- the centering device comprises pairs of bolts, wherein the line-shaped detection area is arranged in a plane of symmetry between the two bolts.
- a simple embodiment of the conveyor provides, for example, that the conveyor comprises two parallel toothed belts, wherein in each case a bolt is arranged on one of the two toothed belts. It can be in the detection area between the Timing belt to be arranged a central web, which projects slightly beyond the two toothed belts. As a result, the conveyed material is entrained by the conveying bolts via the central web, so that a secure centering and smooth bearing between the bolts is ensured in the detection area, whereby a uniform scanning of the conveyed material is ensured.
- the conveyed material is aligned centrically relative to the line-shaped detection region by means of a centering device, and in a first process step the diameter of the conveyed material is irradiated in the conveying direction with a first group of light sources for diverging light bundles whose respective optical axis is normal to the conveyed material and is projected onto the at least one light detector, wherein the irradiated diameter is measured several times and determined by subsequent averaging.
- the at least one light detector has a line-shaped detection area parallel to the conveying direction
- the conveyor has a centering device for centric alignment of the conveyed relative to the line-shaped detection area.
- the diameter of the conveyed material is irradiated in the conveying direction by a second group of light sources for diverging light bundles whose respective optical axis is oriented obliquely to the conveyed material, the irradiated diameter being measured several times and the subsequent averaging Side surface shape of the conveyed material is determined.
- the first and second process steps can also be carried out several times in succession, that is, following the second process step, further processes with the first and second process steps.
- the Fig. 1 shows a schematic representation of a side view of a device according to the invention with a conveyor 1, which is formed in the illustrated embodiment as an inclined conveyor with two parallel toothed belt.
- the conveyor 1 is provided with pairs of bolts 2, wherein in each case a bolt 2 is arranged on one of the two toothed belts.
- the bolts 2 serve on the one hand as a driver for the coin-like conveyed 4, and on the other hand as a centering device, as will be explained in more detail.
- a central web 5 can be arranged between the toothed belts (see Fig. 2 ), which projects slightly beyond the two toothed belts.
- the conveyed material 4 is entrained by the conveying bolt 2 via the central web 5, so that a secure centering and smooth bearing between the bolts 2 is ensured in the detection area, whereby a uniform scanning of the conveyed product 4 is ensured.
- the two toothed belts are driven approximately by a common toothed disk 8, so that a horizontally constant positioning of the conveyed product 4 is ensured.
- a guide rail can be provided for the rotating toothed belt.
- light sources 6, 7 for diverging light bundles are arranged below the conveyor 1, wherein a first group of light sources 6 is arranged so that their respective optical axis is oriented normal to the conveyed material 4, and a second group of light sources 7 is arranged in that its respective optical axis is oriented obliquely to the material 4 to be conveyed.
- the light sources 6, 7 are, for example, LEDs (light-emitting diodes), in particular also incoherent light sources.
- the first group of light sources 6 consists only of a single light source whose optical axis is oriented normal to the conveyed 4, whereby the structure is not only simplified, but sometimes an improved accuracy of the measurement can be achieved.
- At least one light detector 3 which has a line-shaped detection region parallel to the conveying direction R, is arranged.
- the at least one light detector 3 is a photodiode line, in the exemplary embodiment shown, two rows of photodiodes, which are arranged one behind the other parallel to the direction of conveyance R, are provided. If the line-shaped detection region is arranged in a plane of symmetry between the two bolts 2, the conveyed material 4 is automatically centered relative to the line-shaped detection region, so that the diameter D of the conveyed product 4 in the conveying direction R is measured. In this way, a simple centering device can be realized.
- the determination of the diameter D of the conveyed product 4 takes place with the aid of the first group of light sources 6, which are arranged centrally with respect to the photodiode rows 3 and whose divergent light propagation images the diameter of the conveyed product 4 in the conveying direction R onto the rows of photodiodes 3 (FIG. Fig. 3 . Fig. 5 ).
- a value can be ascertained which is already very similar to the diameter D of the conveyed item 4 in the conveying direction R.
- second group of light sources 7 gives measured values, which depend very much on the thickness d of the conveyed 4. Based on these measured values for the diameter D of the conveyed product 4 in the conveying direction R, the diameter D and the lateral surface shape of the conveyed product 4, in particular the thickness d, can be determined by software. In this case, the sequence of the first and second process steps can also be carried out several times in succession. Furthermore, the second method step can also be carried out first, and then the first method step.
- the brightness of the light sources 7 is also possible to provide a regulation for the brightness of the light sources 7 in order to keep the brightness constant.
- the brightness of the light sources 7 is subject to a fluctuation during their lifetime, or in the course of temperature changes. Since, according to the invention, diverging light is used for the measurement without the aid of lenses, these fluctuations can impair the measuring accuracy, so that a brightness control for compensating for these fluctuations increases the accuracy.
- a plurality of measured values are determined, which then gain in accuracy by averaging.
- short-term disturbances such as movements of the conveyed material 4 or interruptions of the light propagation, can thus be filtered out. That way you can high accuracies can be achieved without depending on only a projected maximum or peak value, as is the case for example with the use of laser light.
- the side surface shape of the conveyed product 4 can also be checked, ie whether the side surface is approximately smooth, knurled or cambered, or how thick the conveyed material 4 is.
- the device according to the invention or the method according to the invention also requires no optics, and is hardly sensitive to dirt, since the conveyed 4 is illuminated from the bottom, and the sensitive light detectors 3 are located above the conveyed 4.
- the invention thus realizes a device and a method for the detection of coins and coin-like conveyed, on the one hand, a reliable detection of the conveyed material even with brief disturbing influences, such as movements of the conveyed material or impaired light beams is ensured, and on the other hand, no sensitivity given to contamination.
- the device according to the invention is simple in structure and therefore also inexpensive.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing Of Coins (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zur Erkennung von Münzen und münzähnlichem Fördergut mithilfe zumindest einer Lichtquelle für divergierende Lichtbündel und zumindest eines Lichtdetektors, sowie einem Förderer zum liegenden Transport des vereinzelten Förderguts, wobei der Förderer in einem Erkennungsbereich zwischen der zumindest einen Lichtquelle und dem zumindest einem Lichtdetektor verläuft, und der zumindest eine Lichtdetektor über einen zeilenförmigen Detektierbereich parallel zur Förderrichtung verfügt, gemäß dem Oberbegriff von Anspruch 1. Die Erfindung betrifft des Weiteren ein Verfahren zur Erkennung von Münzen und münzähnlichem Fördergut, gemäß dem Oberbegriff von Anspruch 10.The invention relates to a device for detecting coins and coin-like conveyed by means of at least one light source for divergent light beam and at least one light detector, and a conveyor for horizontal transport of the separated conveyed material, wherein the conveyor in a detection area between the at least one light source and the at least one light detector According to the preamble of
Eine solche Vorrichtung ist etwa aus der
Gattungsgemäße Vorrichtung zur Münzerkennung basieren zumeist auf der Verwendung von Laserlicht, da die linienförmige, also parallele Ausbreitung des Laserlichts eine punktgenaue Abtastung des Förderguts, und somit eine einfache Vermessung, erlaubt. Dabei wird das Fördergut durch einen oder mehrere Laserstrahlen hindurch bewegt, und aus der Unterbrechung des Laserstrahls durch das Fördergut Informationen gewonnen, die eine Identifizierung des entsprechenden Förderguts erlauben. Allerdings weist die Verwendung von Laserlicht in der Praxis auch Nachteile auf, da die Genauigkeit der punktgenauen Vermessung durch kurzzeitig störende Einflüsse, wie etwa Bewegungen des Förderguts, oder Unterbrechungen bzw. Beeinträchtigungen des Lichtstrahls, vermindert wird. Somit erweisen sich Vorrichtungen auf Basis von Laserlicht auch als schmutzempfindlich.Generic device for coin recognition are usually based on the use of laser light, since the linear, so parallel propagation of the laser light allows accurate scanning of the conveyed, and thus a simple measurement allowed. In this case, the conveyed material is moved through one or more laser beams, and obtained from the interruption of the laser beam through the conveyed information that allows identification of the corresponding conveyed. However, the use of laser light in practice also has disadvantages, since the accuracy of the spot-precise measurement is reduced by briefly disturbing influences, such as movements of the conveyed material, or interruptions or impairments of the light beam. Thus, devices based on laser light also prove to be sensitive to dirt.
Von einer Verwendung von Lichtquellen für divergierende Lichtbündel, insbesondere für inkohärentes Licht, wird in der Regel Abstand genommen, da hierfür die Verwendung einer Optik erforderlich erscheint, die wiederum mit Nachteilen verbunden ist. So müssen etwa die Linsen einer solchen Optik immer wieder justiert und gereinigt werden.The use of light sources for divergent light bundles, in particular for incoherent light, is generally discarded, since this requires the use of optics, which in turn is associated with disadvantages. For example, the lenses of such an optic have to be adjusted and cleaned again and again.
Es ist daher das Ziel der Erfindung, eine Vorrichtung bzw. ein Verfahren zur Erkennung von Münzen und münzähnlichem Fördergut zu verwirklichen, das diese Nachteile nicht aufweist, und einerseits eine zuverlässige Erkennung des Förderguts auch bei kurzzeitig störenden Einflüssen, wie etwa Bewegungen des Förderguts oder Beeinträchtigungen der Lichtstrahlen, erlaubt, und andererseits auch unempfindlich gegenüber Verschmutzungen ist. Die erfindungsgemäße Vorrichtung soll dabei einfach aufgebaut und daher auch kostengünstig sein.It is therefore the object of the invention to realize a device or a method for the detection of coins and coin-like conveyed material which does not have these disadvantages, and on the one hand a reliable detection of the conveyed even with short-term disturbing influences, such as movements of the conveyed or Impairment of light rays, allowed, and on the other hand also insensitive to contamination. The device according to the invention should be simple in construction and therefore cost-effective.
Diese Ziele werden durch die Merkmale von Anspruch 1 bzw. Anspruch 10 erreicht. Anspruch 1 bezieht sich dabei auf eine Vorrichtung zur Erkennung von Münzen und münzähnlichem Fördergut mithilfe zumindest einer Lichtquelle für divergierende Lichtbündel und zumindest eines Lichtdetektors, sowie einem Förderer zum liegenden Transport des vereinzelten Förderguts, wobei der Förderer in einem Erkennungsbereich zwischen der zumindest einen Lichtquelle und dem zumindest einem Lichtdetektor verläuft, und der zumindest eine Lichtdetektor über einen zeilenförmigen Detektierbereich parallel zur Förderrichtung verfügt. Erfindungsgemäß ist hierbei vorgesehen, dass der Förderer eine Zentriereinrichtung zur zentrischen Ausrichtung des Förderguts relativ zum zeilenförmigen Detektierbereich aufweist, und der Lichtdetektor für eine mehrmalige Messung des angestrahlten Durchmessers und anschließende Mittelwertbildung ausgelegt ist.These objects are achieved by the features of
Erfingdungsgemäß wird somit mit divergierenden Lichtbündeln gearbeitet, sodass die Verwendung von Laserlicht mit paralleler Lichtausbreitung, oder von Linsen und dergleichen, sowie die damit verbundenen Nachteile vermieden werden. Unter divergierenden Lichtbündeln werden hier Lichtbündel mit nicht-parallelen Randstrahlen verstanden, im Gegensatz etwa zu Laserlicht mit paralleler Lichtausbreitung, wobei die Divergenz der Lichtbündel in der Größenordnung des zu messenden Fördergutes liegt.According to the invention, work is therefore carried out with diverging light bundles, so that the use of laser light with parallel light propagation, or of lenses and the like, and the associated disadvantages are avoided. Diverging light bundles are here understood as light bundles with non-parallel marginal rays, in contrast to laser light with parallel propagation of light, for example, the divergence of the light bundles being of the order of magnitude of the conveyed material to be measured.
Die vermeintlich geringere Genauigkeit einer Messung mithilfe von nichtpunktförmigem, also divergierendem Licht wird dabei durch zusätzliche Maßnahmen kompensiert, und zwar mithilfe einer mehrmaligen Messung eines definierten Durchmessers des Förderguts, nämlich jenem in Förderrichtung. Das wird dadurch erreicht, indem einerseits der zumindest eine Lichtdetektor über einen zeilenförmigen Detektierbereich parallel zur Förderrichtung verfügt, auf den der Durchmesser des Förderguts in Förderrichtung abgebildet wird, und der Förderer eine Zentriereinrichtung zur zentrischen Ausrichtung des Förderguts relativ zum zeilenförmigen Detektierbereich aufweist. Aufgrund der mehrmaligen Messung kann schließlich ein Mittelwert gebildet werden, der kurzzeitig störende Einflüsse während einer Messung ausgleicht, und die Genauigkeit der Erkennung erhöht. Die Anmelderin hat dabei festgestellt, dass mithilfe der erfindungsgemäßen Maßnahmen Genauigkeiten der Erkennung erzielt werden können, die durchaus im Bereich von Laserlicht-basierten Vorrichtungen liegen, ohne jedoch die mit diesen Vorrichtungen verbundenen Nachteile aufzuweisen.The supposedly lower accuracy of a measurement using non-point-like, ie diverging, light is compensated by additional measures, namely by means of a repeated measurement of a defined diameter of the conveyed material, namely that in the conveying direction. This is achieved, on the one hand, by the at least one light detector having a line-shaped detection region parallel to the conveying direction onto which the diameter of the conveyed material is imaged in the conveying direction, and the conveyor has a centering device for centering the conveyed material relative to the line-shaped detecting region. Finally, due to the repeated measurement, an average value can be formed which briefly compensates for interfering influences during a measurement and increases the accuracy of the recognition. The Applicant has found that by means of the measures according to the invention accuracies of recognition can be achieved, which are quite within the range of Laser light-based devices are without, however, having the disadvantages associated with these devices.
Gemäß einer bevorzugten Ausführungsform der Erfindung kann des Weiteren vorgesehen sein, dass eine erste Gruppe von Lichtquellen so angeordnet ist, dass ihre jeweilige optische Achse normal zum Fördergut orientiert ist, und eine zweite Gruppe von Lichtquellen so angeordnet ist, dass ihre jeweilige optische Achse schräg zum Fördergut orientiert ist. Die erste Gruppe eignet sich bestens zur Ermittlung des Durchmessers des Förderguts, und die zweite Gruppe zur Ermittlung der Seitenflächenform des Förderguts, also ob die Seitenfläche etwa glatt, gerändelt oder bombiert ist, oder auch wie dick das Fördergut ist. Dadurch ist die Vorrichtung auch zur Erkennung von münzähnlichem Fördergut geeignet, wie etwa rundem Fördergut mit Bohrungen, ähnlich einer Beilagscheibe, und somit etwa zur Prüfung solcher Objekte auf Innen- und Außendurchmesser oder Versatz, da die Kantenpositionen ausgewertet werden, und nicht bloß die abgedeckte Fläche.According to a preferred embodiment of the invention may further be provided that a first group of light sources is arranged so that their respective optical axis is oriented normal to conveyed, and a second group of light sources is arranged so that their respective optical axis obliquely to Conveyed goods is oriented. The first group is ideal for determining the diameter of the conveyed material, and the second group for determining the side surface shape of the conveyed material, ie whether the side surface is approximately smooth, knurled or cambered, or how thick the conveyed material is. Thus, the device is also suitable for the detection of coin-like conveyed material, such as round conveyed with holes, similar to a washer, and thus about to check such objects on inner and outer diameter or offset, since the edge positions are evaluated, and not just the covered area ,
Vorzugsweise handelt es sich bei den Lichtquellen um LEDs (Licht emittierende Dioden). Solche Lichtquellen sind preiswert und widerstandsfähig. Bei dem zumindest einen Lichtdetektor handelt es sich vorzugsweise um zumindest eine Fotodiodenzeile. Dabei können auch zwei Fotodiodenzeilen vorgesehen sein, die hintereinander parallel zur Förderrichtung angeordnet sind. Ist deren Abtastung des Durchmessers synchronisiert, so können störende Einflüsse der Bewegung des Förderguts zusätzlich vermindert werden.Preferably, the light sources are LEDs (light-emitting diodes). Such light sources are inexpensive and durable. The at least one light detector is preferably at least one row of photodiodes. In this case, two rows of photodiodes can be provided, which are arranged one behind the other parallel to the conveying direction. If the scanning of the diameter is synchronized, disturbing influences of the movement of the conveyed material can be additionally reduced.
Gemäß einer bevorzugten Ausführungsform der Erfindung kann des Weiteren vorgesehen sein, dass der Förderer als Schrägförderer ausgeführt ist, und die Zentriereinrichtung Paare von Bolzen umfasst, wobei der zeilenförmige Detektierbereich in einer Symmetrieebene zwischen den beiden Bolzen angeordnet ist. Das stellt eine einfache Verwirklichung der Zentriereinrichtung dar. Durch die schräge Anordnung des Förderers im Erkennungsbereich wird nämlich das Fördergut aufgrund der Schwerkraft sicher von den beiden Bolzen aufgenommen. Ist der zeilenförmige Detektierbereich in einer Symmetrieebene zwischen den beiden Bolzen angeordnet, wird das Fördergut automatisch relativ zum zeilenförmigen Detektierbereich zentriert, sodass der Durchmesser des Förderguts in Förderrichtung gemessen wird.According to a preferred embodiment of the invention may further be provided that the conveyor is designed as an inclined conveyor, and the centering device comprises pairs of bolts, wherein the line-shaped detection area is arranged in a plane of symmetry between the two bolts. This represents a simple realization of the centering device. Due to the oblique arrangement of the conveyor in the detection area namely the conveyed is safely absorbed by the two bolts due to gravity. If the line-shaped detection region is arranged in a plane of symmetry between the two bolts, the conveyed material is automatically centered relative to the line-shaped detection region, so that the diameter of the conveyed material in the conveying direction is measured.
Eine einfache Ausführung des Förderers sieht etwa vor, dass der Förderer zwei parallele Zahnriemen umfasst, wobei jeweils ein Bolzen an einem der beiden Zahnriemen angeordnet ist. Dabei kann im Erkennungsbereich zwischen den Zahnriemen ein Mittelsteg angeordnet sein, der die beiden Zahnriemen geringfügig überragt. Dadurch wird durch die fördernden Bolzen das Fördergut über den Mittelsteg mitgeschleift, sodass im Erkennungsbereich eine sichere Zentrierung und ruhige Lagerung zwischen den Bolzen sichergestellt wird, wodurch eine gleichmäßige Abtastung des Förderguts gewährleistet ist.A simple embodiment of the conveyor provides, for example, that the conveyor comprises two parallel toothed belts, wherein in each case a bolt is arranged on one of the two toothed belts. It can be in the detection area between the Timing belt to be arranged a central web, which projects slightly beyond the two toothed belts. As a result, the conveyed material is entrained by the conveying bolts via the central web, so that a secure centering and smooth bearing between the bolts is ensured in the detection area, whereby a uniform scanning of the conveyed material is ensured.
Zur Verbesserung der Genauigkeit der Messung kann des Weiteren eine Regelung für die Helligkeit der Lichtquellen vorgesehen sein, um die Helligkeit der Lichtquellen konstant zu halten.In order to improve the accuracy of the measurement, it is further possible to provide a regulation for the brightness of the light sources in order to keep the brightness of the light sources constant.
Erfindungsgemäß wird des Weiteren ein Verfahren zur Erkennung von Münzen und münzähnlichem Fördergut mithilfe zumindest einer Lichtquelle für divergierende Lichtbündel und zumindest eines Lichtdetektors mit einem zeilenförmigen Detektierbereich, sowie einem Förderer, der in einem Erkennungsbereich das vereinzelte, liegende Fördergut entlang einer Förderrichtung zwischen der zumindest einen Lichtquelle und dem zumindest einem Lichtdetektor hindurch bewegt, wobei die Förderrichtung parallel zum zeilenförmigen Detektierbereich verläuft, vorgeschlagen. Erfindungsgemäß ist hierbei vorgesehen, mithilfe einer Zentriereinrichtung das Fördergut relativ zum zeilenförmigen Detektierbereich zentrisch ausgerichtet wird, und in einem ersten Verfahrensschritt der Durchmesser des Förderguts in Förderrichtung mit einer ersten Gruppe von Lichtquellen für divergierende Lichtbündel, deren jeweilige optische Achse normal zum Fördergut orientiert ist, angestrahlt und auf den zumindest einen Lichtdetektor projiziert wird, wobei der angestrahlte Durchmesser mehrmals gemessen und durch anschließende Mittelwertbildung ermittelt wird. Die vorrichtungsgemäßen Maßnahmen zur Sicherstellung einer Projektion des Durchmessers des Förderguts in Förderrichtung wurden oben erläutert, indem nämlich einerseits der zumindest eine Lichtdetektor über einen zeilenförmigen Detektierbereich parallel zur Förderrichtung verfügt, und der Förderer eine Zentriereinrichtung zur zentrischen Ausrichtung des Förderguts relativ zum zeilenförmigen Detektierbereich aufweist.According to the invention, a method for detecting coins and coin-like conveyed material by means of at least one light source for divergent light bundles and at least one light detector with a line-shaped detection area, and a conveyor in a detection area, the scattered, lying conveyed along a conveying direction between the at least one light source and the at least one light detector moves through, wherein the conveying direction is parallel to the line-shaped detection area, proposed. According to the invention, it is provided that the conveyed material is aligned centrically relative to the line-shaped detection region by means of a centering device, and in a first process step the diameter of the conveyed material is irradiated in the conveying direction with a first group of light sources for diverging light bundles whose respective optical axis is normal to the conveyed material and is projected onto the at least one light detector, wherein the irradiated diameter is measured several times and determined by subsequent averaging. The device according to measures for ensuring a projection of the diameter of the conveyed in the conveying direction have been explained above, namely on the one hand the at least one light detector has a line-shaped detection area parallel to the conveying direction, and the conveyor has a centering device for centric alignment of the conveyed relative to the line-shaped detection area.
Schließlich kann vorgesehen sein, dass in einem zweiten Verfahrensschritt der Durchmesser des Förderguts in Förderrichtung von einer zweiten Gruppe von Lichtquellen für divergierende Lichtbündel, deren jeweilige optische Achse schräg zum Fördergut orientiert ist, angestrahlt wird, wobei der angestrahlte Durchmesser mehrmals vermessen und durch anschließende Mittelwertbildung die Seitenflächenform des Förderguts ermittelt wird.Finally, it can be provided that, in a second process step, the diameter of the conveyed material is irradiated in the conveying direction by a second group of light sources for diverging light bundles whose respective optical axis is oriented obliquely to the conveyed material, the irradiated diameter being measured several times and the subsequent averaging Side surface shape of the conveyed material is determined.
Die ersten und zweiten Verfahrensschritte können dabei auch mehrmals hintereinander ausgeführt werden, also folgend auf den zweiten Verfahrensschritt weitere Abläufe mit erstem und zweiten Verfahrensschritt.The first and second process steps can also be carried out several times in succession, that is, following the second process step, further processes with the first and second process steps.
Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels mithilfe der beiliegenden Zeichnungen näher erläutert. Hierbei zeigen die
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Fig. 1 eine schematische Darstellung einer Seitenansicht einer Ausführungsform einer erfindungsgemäßen Vorrichtung während der Durchführung des zweiten Verfahrensschrittes, -
Fig. 2 die Ausführungsform gemäßFig. 1 von oben gesehen, die -
Fig. 3 die Seitenansicht der Ausführungsform gemäßFig. 1 während der Durchführung des ersten Verfahrensschrittes, -
Fig. 4 eine schematische Darstellung einer Seitenansicht einer weiteren Ausführungsform einer erfindungsgemäßen Vorrichtung während der Durchführung des zweiten Verfahrensschrittes, und die -
Fig. 5 die Seitenansicht der Ausführungsform gemäßFig. 4 während der Durchführung des ersten Verfahrensschrittes.
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Fig. 1 1 is a schematic representation of a side view of an embodiment of a device according to the invention during the implementation of the second method step, -
Fig. 2 the embodiment according toFig. 1 Seen from above, the -
Fig. 3 the side view of the embodiment according toFig. 1 during the implementation of the first process step, -
Fig. 4 a schematic representation of a side view of another embodiment of a device according to the invention during the implementation of the second method step, and the -
Fig. 5 the side view of the embodiment according toFig. 4 during the implementation of the first process step.
Die
In einem Erkennungsbereich sind unterhalb des Förderers 1 Lichtquellen 6,7 für divergierende Lichtbündel angeordnet, wobei eine erste Gruppe von Lichtquellen 6 so angeordnet ist, dass ihre jeweilige optische Achse normal zum Fördergut 4 orientiert ist, und eine zweite Gruppe von Lichtquellen 7 so angeordnet ist, dass ihre jeweilige optische Achse schräg zum Fördergut 4 orientiert ist. Bei den Lichtquellen 6,7 handelt es sich etwa um LEDs (Licht emittierende Dioden), insbesondere auch um inkohärente Lichtquellen. In der Ausführungsform gemäß der
Oberhalb des Förderers 1 ist zumindest ein Lichtdetektor 3, der über einen zeilenförmigen Detektierbereich parallel zur Förderrichtung R verfügt, angeordnet. Bei dem zumindest einen Lichtdetektor 3 handelt es sich dabei etwa um eine Fotodiodenzeile, wobei im gezeigten Ausführungsbeispiel zwei Fotodiodenzeilen, die hintereinander parallel zur Förderrichtung R angeordnet sind, vorgesehen sind. Ist der zeilenförmige Detektierbereich in einer Symmetrieebene zwischen den beiden Bolzen 2 angeordnet, wird das Fördergut 4 automatisch relativ zum zeilenförmigen Detektierbereich zentriert, sodass der Durchmesser D des Förderguts 4 in Förderrichtung R gemessen wird. Auf diese Weise kann eine einfache Zentriereinrichtung verwirklicht werden.Above the
Die Ermittlung des Durchmessers D des Förderguts 4 erfolgt mithilfe der ersten Gruppe von Lichtquellen 6, die zentrisch gegenüber den Fotodiodenzeilen 3 angeordnet sind, und deren divergierende Lichtausbreitung den Durchmesser des Förderguts 4 in Förderrichtung R auf die Fotodiodenzeilen 3 abbildet (
Zur Verbesserung der Genauigkeit der Messung kann auch eine Regelung für die Helligkeit der Lichtquellen 7 vorgesehen sein, um die Helligkeit konstant zu halten. Insbesondere im Falle der Verwendung von LEDs ist die Helligkeit der Lichtquellen 7 während ihrer Lebensdauer, oder im Zuge von Temperaturänderungen, einer Schwankung unterworfen. Da erfindungsgemäß divergierendes Licht ohne Zuhilfenahme von Linsen zur Messung verwendet wird, können diese Schwankungen die Messgenauigkeit beeinträchtigen, sodass eine Helligkeitsregelung zur Kompensation dieser Schwankungen die Genauigkeit erhöht.To improve the accuracy of the measurement, it is also possible to provide a regulation for the brightness of the
Durch die mehrmalige Positionsbestimmung des Förderguts 4 werden somit mehrere Messwerte ermittelt, die im Anschluss durch Mittelwertbildung an Genauigkeit gewinnen. Durch diese Mittelwertbildung können somit kurzzeitige Störungen, wie etwa Bewegungen des Förderguts 4 oder Unterbrechungen der Lichtausbreitung, ausgefiltert werden. Auf diese Weise können hohe Genauigkeiten erzielt werden, ohne von nur einem projizierten Maximal- oder Scheitelwert abhängig zu sein, wie dies etwa bei der Verwendung von Laserlicht der Fall ist. Des Weiteren kann aufgrund der Verwendung von zwei unterschiedlichen Beleuchtungswinkeln und das divergierende Licht auch die Seitenflächenform des Förderguts 4 geprüft werden, also ob die Seitenfläche etwa glatt, gerändelt oder bombiert ist, oder auch wie dick das Fördergut 4 ist.As a result of the repeated determination of the position of the conveyed
Die erfindungsgemäße Vorrichtung bzw. das erfindungsgemäße Verfahren benötigt auch keine Optik, und ist kaum schmutzempfindlich, da das Fördergut 4 von der Unterseite beleuchtet wird, und sich die empfindlichen Lichtdetektoren 3 oberhalb des Förderguts 4 befinden.The device according to the invention or the method according to the invention also requires no optics, and is hardly sensitive to dirt, since the conveyed 4 is illuminated from the bottom, and the
Die Erfindung verwirklicht somit eine Vorrichtung bzw. ein Verfahren zur Erkennung von Münzen und münzähnlichem Fördergut, bei dem einerseits eine zuverlässige Erkennung des Förderguts auch bei kurzzeitig störenden Einflüssen, wie etwa Bewegungen des Förderguts oder Beeinträchtigungen der Lichtstrahlen, sichergestellt ist, und andererseits auch keine Empfindlichkeit gegenüber Verschmutzungen gegeben ist. Die erfindungsgemäße Vorrichtung ist dabei einfach aufgebaut und daher auch kostengünstig.The invention thus realizes a device and a method for the detection of coins and coin-like conveyed, on the one hand, a reliable detection of the conveyed material even with brief disturbing influences, such as movements of the conveyed material or impaired light beams is ensured, and on the other hand, no sensitivity given to contamination. The device according to the invention is simple in structure and therefore also inexpensive.
Claims (11)
- A device for recognizing coins and conveyed material (4) similar to coins with the aid of at least one light source (6, 7) and at least one light detector (3), and a conveyor (1) for the transport of the isolated conveyed material (4), the conveyor (1) running in a recognition area between the at least one light source (6, 7) and the at least one light detector (3), characterized in that the at least one light source (6, 7) is a light source (6, 7) for divergent light bundles, and the at least one light detector (3) has a linear detection area parallel to the conveyor direction (R), the conveyor (1) having a centering unit for the centric orientation of the conveyed material (4) relative to the linear detection area.
- The device according to Claim 1, characterized in that a first group of light sources (6) is situated so that their respective optical axis is oriented perpendicularly to the conveyed material (4), and a second group of light sources (7) is situated so that their respective optical axis is oriented diagonally to the conveyed material (4).
- The device according to Claim 1 or 2, characterized in that the light sources (6, 7) are LEDs (light-emitting diodes).
- The device according to one of Claims 1 to 3, characterized in that the at least one light detector (3) is at least one photodiode line.
- The device according to Claim 4, characterized in that two photodiode lines are provided, which are situated one behind another parallel to the conveyor direction (R).
- The device according to one of Claims 1 to 5, characterized in that the conveyor (1) is implemented as an inclined conveyor, and the centering unit comprises pairs of bolts (2), the linear detection area being situated in a plane of symmetry between the two bolts (2).
- The device according to Claim 6, characterized in that the conveyor (1) comprises two parallel toothed belts, one bolt (2) being situated on each of the two toothed belts.
- The device according to Claim 7, characterized in that a middle web (5), which protrudes slightly beyond the two toothed belts, is situated in the recognition area between the toothed belts.
- The device according to one of Claims 1 to 8, characterized in that a regulation is provided for the brightness of the light sources (7), to keep the brightness of the light sources (7) constant.
- A method for recognizing coins and conveyed material (4) similar to coins with the aid of at least one light source (6, 7) and at least one light detector (3), and a conveyor (1), which moves the isolated conveyed material (4) in a recognition area along a conveyor direction (R) between the at least one light source (6, 7) and the at least one light detector (3), characterized in that, in a first method step, the diameter (D) of the conveyed material (4) is illuminated in the conveyor direction (R) using a first group of light sources (6) for divergent light bundles, whose respective optical axis is oriented perpendicularly to the conveyed material (4), and projected onto the at least one light detector (3), the illuminated diameter (D) being repeatedly measured and being ascertained by subsequent mean value calculation.
- The method according Claim 10, characterized in that, in a second method step, the diameter (D) of the conveyed material (4) is illuminated in the conveyor direction by a second group of light sources (7) for divergent light bundles, whose respective optical axis is oriented diagonally to the conveyed material (4), the illuminated diameter (D) being repeatedly measured and the lateral surface shape of the conveyed material (4) being ascertained by subsequent mean value calculation.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0156608A AT507222B1 (en) | 2008-10-07 | 2008-10-07 | AUTOMATIC DIAMETER DETERMINATION OF COINS |
PCT/EP2009/062977 WO2010040751A1 (en) | 2008-10-07 | 2009-10-06 | Automatic diameter determination of coins |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2335225A1 EP2335225A1 (en) | 2011-06-22 |
EP2335225B1 true EP2335225B1 (en) | 2012-11-28 |
Family
ID=41346105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09744101A Not-in-force EP2335225B1 (en) | 2008-10-07 | 2009-10-06 | Automatic diameter determination of coins |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110174591A1 (en) |
EP (1) | EP2335225B1 (en) |
AT (1) | AT507222B1 (en) |
DK (1) | DK2335225T3 (en) |
ES (1) | ES2403758T3 (en) |
WO (1) | WO2010040751A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT509885B1 (en) * | 2010-12-28 | 2011-12-15 | Novotech Elektronik Gmbh | APPARATUS AND METHOD FOR COIN DETECTION |
DE102011054167A1 (en) * | 2011-04-07 | 2012-10-11 | Wincor Nixdorf International Gmbh | Device for handling coins |
DE102011001870A1 (en) * | 2011-04-07 | 2012-10-11 | Wincor Nixdorf International Gmbh | Apparatus and method for sorting coins |
DE202011052022U1 (en) | 2011-11-18 | 2011-12-29 | Wincor Nixdorf International Gmbh | Device for handling coins with light barriers for diameter and thickness measurement |
DE102012100309A1 (en) * | 2012-01-13 | 2013-07-18 | Wincor Nixdorf International Gmbh | Device for handling coins with coin receiving containers arranged on both sides |
EP2897104B1 (en) * | 2014-01-17 | 2019-04-17 | Wincor Nixdorf International GmbH | Coin separation system |
JP6756282B2 (en) * | 2017-03-16 | 2020-09-16 | 富士電機株式会社 | Coin check device |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2054932B (en) * | 1979-06-29 | 1983-06-08 | Laurel Bank Machine Co | Coin counting and stopping apparatus for use in a coin handling machine |
FI81458C (en) * | 1987-03-31 | 1990-10-10 | Inter Marketing Oy | Device for identification of coins or the like |
US6142285A (en) | 1996-05-21 | 2000-11-07 | Digitall Inc | Coin testing apparatus and method |
ATE219590T1 (en) * | 1996-07-29 | 2002-07-15 | Qvex Inc | APPARATUS AND METHOD FOR TESTING COINS |
JP3280289B2 (en) * | 1997-09-10 | 2002-04-30 | 横浜電子工業株式会社 | Securities identification device and method |
EP1260943A4 (en) * | 2001-07-26 | 2003-08-27 | Sugai General Ind Ltd | Device for counting/sorting coins |
DE10300608B4 (en) * | 2003-01-10 | 2004-09-30 | National Rejectors, Inc. Gmbh | Method for recognizing an embossed image of a coin in a coin machine |
EP1599844B1 (en) * | 2003-02-19 | 2010-05-05 | Walter Hanke Mechanische Werkstätten GmbH & Co. KG | Method and device for testing coins |
AT413006B (en) * | 2003-02-21 | 2005-09-26 | Novotech Elektronik Ges M B H | DEVICE FOR ASSEMBLING COINS |
US7147552B2 (en) * | 2004-06-09 | 2006-12-12 | Novotech Elektronik Gesellschaft M.B.H. | Apparatus for separating coins |
-
2008
- 2008-10-07 AT AT0156608A patent/AT507222B1/en not_active IP Right Cessation
-
2009
- 2009-10-06 DK DK09744101.8T patent/DK2335225T3/en active
- 2009-10-06 ES ES09744101T patent/ES2403758T3/en active Active
- 2009-10-06 EP EP09744101A patent/EP2335225B1/en not_active Not-in-force
- 2009-10-06 WO PCT/EP2009/062977 patent/WO2010040751A1/en active Application Filing
-
2011
- 2011-03-24 US US13/071,101 patent/US20110174591A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
AT507222B1 (en) | 2010-03-15 |
AT507222A4 (en) | 2010-03-15 |
WO2010040751A1 (en) | 2010-04-15 |
EP2335225A1 (en) | 2011-06-22 |
DK2335225T3 (en) | 2013-03-11 |
ES2403758T3 (en) | 2013-05-21 |
US20110174591A1 (en) | 2011-07-21 |
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