EP0716400B1 - Dispositif pour détecter un fil dans une machine activée par des pièces de monnaie - Google Patents

Dispositif pour détecter un fil dans une machine activée par des pièces de monnaie Download PDF

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Publication number
EP0716400B1
EP0716400B1 EP95117911A EP95117911A EP0716400B1 EP 0716400 B1 EP0716400 B1 EP 0716400B1 EP 95117911 A EP95117911 A EP 95117911A EP 95117911 A EP95117911 A EP 95117911A EP 0716400 B1 EP0716400 B1 EP 0716400B1
Authority
EP
European Patent Office
Prior art keywords
coin
sensors
line
light source
runway
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95117911A
Other languages
German (de)
English (en)
Other versions
EP0716400A1 (fr
Inventor
Hans-Ulrich Dipl.-Ing. Cohrs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Crane Payment Innovations GmbH
Original Assignee
National Rejectors Inc GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Rejectors Inc GmbH filed Critical National Rejectors Inc GmbH
Publication of EP0716400A1 publication Critical patent/EP0716400A1/fr
Application granted granted Critical
Publication of EP0716400B1 publication Critical patent/EP0716400B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F1/00—Coin inlet arrangements; Coins specially adapted to operate coin-freed mechanisms
    • G07F1/04—Coin chutes
    • G07F1/041—Coin chutes with means, other than for testing currency, for dealing with inserted foreign matter, e.g. "stuffing", "stringing" or "salting"
    • G07F1/042—Coin chutes with means, other than for testing currency, for dealing with inserted foreign matter, e.g. "stuffing", "stringing" or "salting" the foreign matter being a long flexible member attached to a coin
    • G07F1/044—Automatic detection of the flexible member

Definitions

  • the invention relates to a Coin mechanism according to the preamble of claim 1.
  • a coin device has become known from document WO-A-92/18952.
  • From DE 33 35 385 has also become known with the help a large number of light barriers Screens arranged in the direction of the coins, to carry out a diameter check of coins. From the DE 40 16 680 or EP 0 078 214 is known for diameter determination of coins across the direction of the coins a linear sensor that consists of individual light barriers exists to provide.
  • the invention has for its object a device for contactless detection of threads or similar To create foreign bodies in coin devices that with great security prevents one attached to a thread Coin recognized the acceptance area and as real is accepted.
  • one line is out Point sensors provided the photosensitive diodes contains, the line transverse to the direction of movement of the Coin is arranged.
  • the evaluation device compares either all output signals from the point sensors a predetermined setpoint and emits a return signal, if at least one output signal from a point sensor predetermined value not reached. Alternatively, everyone Output signals of the point sensors added or integrated and the integrated signal with a predetermined setpoint compared, producing a return signal when the specified setpoint is not reached.
  • the device according to the invention is based on so-called Pixel sensors that are very small in size contain photosensitive elements that are roughly at a distance are arranged from 100 to 200 microns and in turn one Have dimensions in one direction barely over 100 and in the other is a little less than 100 ⁇ m. With such fine sensor lines it is easily possible to determine the presence a thread in the range of a few photosensitive Elements without further ado detect. For the operation of such a sensor line two basic functions are crucial. During the first Period, the charges accumulate on the photosensitive Elements (pixels). In the subsequent issue period they become serial as an electrical signal at the output submitted. This is a constantly repeating one Sampling is required, such as via a shift register and a "sample and hold" circuit takes place. After a Embodiment of the invention, the pixel sensor is a control circuit assigned, which ensures that the output voltage of the photosensitive elements always one take a constant predetermined value. This is chosen that it is below the saturation of the output voltage lies.
  • the optical Sensor arrangement in the insertion area or at the end of the coin path arranged.
  • the necessary sensor length is shortened considerably during the career, because the thread through the coin weight around this edge is pulled.
  • the sensor arrangement or the light source are, if possible so attached that pollution becomes Limits.
  • the controller circuit ensures that the output voltage is always kept at the same value and thus there is independence from eventual Contamination or other influences.
  • a further embodiment of the invention are sensor rows and light source on opposite sides arranged a frame.
  • a separate evaluation device the output signals of the sensor line on Frame arranged. This is an independent unit for Detection of threads or similar foreign bodies created, which can also be retrofitted in already installed coin validators can be installed.
  • the invention can also be used for Diameter determination for coins can be used. To For this purpose, however, it is necessary that the sensor or the sensor line a predetermined distance from a coin track Has. The extent of each shadowing one certain number of point sensors is therefore a measure of the diameter of the coin.
  • Fig. 1 is a coin validator through a main plate 10 and a raceway support plate 12 indicated.
  • the main plate 10 is an IR light emitting diode (LED) 14 arranged. It directs its beam 16 across the direction of travel a coin (not shown) between the plates 10, 12 on the track carrier plate 12, in which an optical Sensor 18 arranged in the form of a line of point sensors is.
  • the shadow 20 is indicated by a thread 22 generated, on which a coin 24 hangs (Fig. 2).
  • the sensor surface 26 can be seen through a gap 28 in the track carrier plate 18 with the light of the diode 14 can be acted upon.
  • the sensor surface of the pixel sensor described exists for example from 64 individual photosensitive elements, each of which has an area of 70 x 120 m, the elements arranged at a distance of 125 microns are. This gives a total length of e.g. a little more than 1.2 cm. With the help of such a sensor line it is possible to get such a high resolution that also very thin threads, such as thread 22 in FIG. 1, are sufficiently secure can be detected by several point sensors.
  • CCD line sensors are available, graduated up to one Pixel area of e.g. 7 x 7 ⁇ m with a number of 5000 Pixel .. Such a resolution is for this application not mandatory.
  • PSDs position sensitive detectors
  • These position-sensitive photodiodes can, for example, have active sensitive areas of 1 x 37 mm 2 and are therefore also suitable for contactless coin channel monitoring.
  • the evaluation of the analog output signal, which is proportional to the coverage, is not discussed in more detail here.
  • the optical arrangement 18 arranged relatively near the end of the coin track 30.
  • the optical sensor Shortened at this point by the deflection of the coin 24 the necessary sensor length considerably, since the thread 22 drawn around the edge of the raceway 30 by the coin weight becomes. However, it is equally conceivable for the optical sensor to be arranged in the throw-in area (not shown).
  • the signal drop extends over the half the number of pixels. 6 shows a break-in 34, caused by a nylon thread. Here only 2 or 3 pixels affected in their charge. Digitization each individual voltage is synchronized with the Clock of the shift register. All signals can be in one Memory of a microprocessor can be added. Gives way to Total from the "idle result" by an amount, so can the thread manipulation are reported. Is the deviation as in Fig. 6 only slightly, with an integration may not be recognized over the total area of the thread will. It could be necessary here, each one Pixel voltage or a group of pixel voltages digitize and compare with target values. Here this inevitably results in a larger memory requirement and a slower processing speed.
  • the current for the diode 14 (Fig. 1) is on the one hand set that no saturation of the pixel output voltage is possible (see FIGS. 5 and 6). On the other hand, a sufficient amplitude is available. thats why a control circuit, not shown, provided the Output voltage of the pixels over the diode current so long changed until the output voltage the desired Reference value takes the same value. So that is shown Pixel sensor regardless of any contamination and other influences.
  • the pixel sensor or the optical arrangement 18 in the form of a cuboid Blocks 18 is present, which is in a recess 36 the raceway support plate 12 arranged on the back is.
  • the recess has a slot 28 to which the photosensitive surface 26 of the individual pixel sensors assigned.
  • Fig. 4 it can also be seen that the diode 14 in a box-like bulge 38 of the main plate 10 is arranged is, the component 38 from the back the main plate 10 is placed and with this in a more suitable manner Way is connected.
  • a passage slot 40 enables the passage of the light of the diode 14 to the coin channel.
  • the Raceway 30 a sloping towards the raceway support plate 12 Inclination 42 has. It is intended to cause the Coin runs along the facing wall of the carrier plate 12.
  • FIG. 7 shows a box-like frame 50 in perspective shown, for example a height h of 5 mm, a Length 1 of 38 mm and a width b of 8 mm. It is arranged in the coin validator, not shown, that an inserted coin falls through the frame 50 or rolls through. For example, it can be placed behind the coin slot a coin validator can be arranged or in Direction behind the raceway 30 according to Figures 1 to 4.
  • a pixel sensor 52 is arranged, corresponding to the sensor 18 according to Figures 1 to 4.
  • the receptacle 54 for a light emitting diode 54 In the opposite wall is the receptacle 54 for a light emitting diode 54 arranged.
  • the one required for the sensor 52 continues Electronics 56 described above is indicated on the top.
  • a return signal is generated when the Optical sensor arrangement shown a foreign body or a thread in connection with an inserted coin Has been established.
  • the device shown in Fig. 7 can therefore also retrofitted in any coin valid

Landscapes

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

Claims (10)

  1. Dispositif pour pièces de monnaie qui présente une section de canal pour pièces de monnaie avec des capteurs permettant de détecter des pièces de monnaie ainsi qu'une zone d'introduction disposée avant la trajectoire de la pièce de monnaie, comportant un dispositif de capteur optique qui dispose d'une source de lumière (14) et d'un dispositif de réception de la lumière (18) et qui est relié au dispositif d'analyse du dispositif pour pièces de monnaie, la source de lumière (14) étant disposée dans une paroi (10) de la section du canal et une barrette (26) de capteurs par points étroitement contigus, sensibles à la lumière et balayés en série de manière périodique étant disposée sur la paroi opposée, la barrette (26) étant disposée transversalement par rapport au sens de déplacement des pièces de monnaie (24) et le dispositif d'analyse soit comparant le niveau de sortie des capteurs individuels avec une valeur prédéfinie soit intégrant le niveau de sortie et comparant l'intégrale avec une valeur de consigne, caractérisé en ce que le dispositif d'analyse distingue l'ombre d'un corps étranger analogue à un fil, de l'ombre d'une pièce de monnaie dans le but de générer un signal de restitution si un corps étranger est détecté, grâce à quoi le dispositif pour pièces de monnaie détecte sans contact des corps étrangers analogues à un fil.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'agencement de capteurs optiques (26) est disposé dans la zone d'introduction ou à la fin de la trajectoire (30) de la pièce de monnaie.
  3. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce qu'une DEL infrarouge (14) est utilisée en tant que source de lumière.
  4. Dispositif selon la revendication 3 caractérisé en ce que la DEL infrarouge (14) est disposée dans une courbure (38) de la plaque principale ou de la plaque support de la trajectoire (10, 12).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la barrette de capteurs (26), y compris le système électronique d'interrogation, est disposée dans un boítier (18) et en ce que le boítier (18) est disposé sur le côté extérieur de la plaque support de la trajectoire ou de la plaque principale, une fente (28) étant formée dans la plaque, dans la zone des capteurs par points.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la barrette de capteurs (52) et la source de lumière (14) sont disposées dans les côtés opposés d'un cadre (50) et en ce qu'un dispositif d'analyse séparé (56) est disposé sur le cadre (50) pour les signaux de sortie de la barrette de capteurs (52).
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé par un circuit de réglage pour la barrette de capteurs (26, 52) qui règle le courant pour la source de lumière (14) à une tension prédéfinie de sortie pour les capteurs de la barrette de capteurs (26, 52).
  8. Dispositif selon la revendication 7, caractérisé en ce que les tensions de sortie des capteurs individuels ou des éléments photosensibles sont inférieures à leur tension de saturation quand elles sont exposées aux rayons de la source de lumière (14).
  9. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'une barrette CCD est utilisée.
  10. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que un PSD est utilisé à la place d'une barrette de capteurs par points.
EP95117911A 1994-12-10 1995-11-14 Dispositif pour détecter un fil dans une machine activée par des pièces de monnaie Expired - Lifetime EP0716400B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4444105 1994-12-10
DE4444105A DE4444105C2 (de) 1994-12-10 1994-12-10 Vorrichtung zur Erfassung eines fadenähnlichen Fremdkörpers in einer Münzvorrichtung

Publications (2)

Publication Number Publication Date
EP0716400A1 EP0716400A1 (fr) 1996-06-12
EP0716400B1 true EP0716400B1 (fr) 1998-05-13

Family

ID=6535520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117911A Expired - Lifetime EP0716400B1 (fr) 1994-12-10 1995-11-14 Dispositif pour détecter un fil dans une machine activée par des pièces de monnaie

Country Status (3)

Country Link
EP (1) EP0716400B1 (fr)
DE (2) DE4444105C2 (fr)
ES (1) ES2117350T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19549407C2 (de) * 1995-08-09 1999-09-23 Nat Rejectors Gmbh Münzvorrichtung
US6648221B2 (en) * 2000-12-01 2003-11-18 Mars Incorporated Polarizer based detector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515395B1 (fr) * 1981-10-27 1985-05-31 Doucet Joel Selecteur multipiece de monnaie
DE3335385A1 (de) * 1983-09-29 1985-04-11 Siemens AG, 1000 Berlin und 8000 München Verfahren und vorrichtung zur optoelektronischen pruefung des durchmessers von muenzen
DE3416045A1 (de) * 1984-04-30 1985-10-31 Siemens AG, 1000 Berlin und 8000 München Verfahren zur erkennung von muenzen bei selbstverkaeufern
US5076414A (en) * 1989-05-24 1991-12-31 Laurel Bank Machines Co., Ltd. Coin discriminating and counting apparatus
FI911955A0 (fi) * 1991-04-22 1991-04-22 Jouko Ruuttu Myntsorteringsanordning.
DE4121986C2 (de) * 1991-07-03 1996-11-28 Nsm Ag Vorrichtung zum Erkennen von Manipulationen am Geldeinführungsschacht von Automaten
DE4231534C2 (de) * 1992-04-14 1995-04-27 Nsm Ag Vorrichtung zur Erkennung eines Fremdkörpers in einem Münzkanal

Also Published As

Publication number Publication date
DE59502166D1 (de) 1998-06-18
DE4444105A1 (de) 1996-06-13
DE4444105C2 (de) 1998-07-02
EP0716400A1 (fr) 1996-06-12
ES2117350T3 (es) 1998-08-01

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