EP0716400B1 - Vorrichtung zur Erfassung eines fadenähnlichen Fremdkörpers in einer Münzvorrichtung - Google Patents
Vorrichtung zur Erfassung eines fadenähnlichen Fremdkörpers in einer Münzvorrichtung Download PDFInfo
- 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
Links
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)
Description
- mechanische Rückzugsverhinderungen, die ein Zurückziehen der Münze am Faden verhindern
- mechanische Abtastvorrichtungen, die straffe und bedingt lose Fäden erkennen und die Bewegung in ein elektrisches Signal umsetzen
- Sensoren, die die Lauf- bzw. Fallrichtung der Münze erkennen und bei falscher Reihenfolge ein Fehlersignal abgeben
- optische Lichtschranke.
- Fig. 1
- zeigt schematisch die Anordnung einer Erfindung zur Detektierung eines Fadens.
- Fig. 2
- zeigt den Faden nach Fig. 1 mit einer anhängenden Münze und einer Sensorzeile.
- Fig. 3
- zeigt eine Draufsicht auf die Anordnung nach Fig. 2 in weiteren Einzelheiten.
- Fig. 4
- zeigt einen Schnitt durch die Darstellung nach Fig. 3, jedoch ohne Faden.
- Fig. 5
- zeigt die Hüllkurve aller Ausgangssignale einer Sensorzeile der Vorrichtung nach den Figuren 1 bis 4 bei einem ersten fadenartigen Fremdkörper.
- Fig. 6
- zeigt die Hüllkurve aller Ausgangssignale der Sensorzeile der Vorrichtung nach den Figuren 1 bis 4 in einem zweiten fadenartigen Fremdkörper.
- Fig. 7
- zeigt perspektivisch schematisch die Ausbildung der erfindungsgemäßen Vorrichtung als separate Einheit.
Claims (10)
- Münzvorrichtung, die einen Münzkanalabschnitt mit Sensoren zur Münzerkennung sowie einen der Münzlaufbahn vorgeordneten Einwurfbereich aufweist, mit einer eine Lichtquelle (14) und eine Lichtempfangsvorrichtung (18) enthaltenden optischen Sensorvorrichtung, die mit der Auswertevorrichtung der Münzvorrichtung verbunden ist, wobei die Lichtquelle (14) in einer Wand (10) des Kanalabschnitts angeordnet ist und eine Zeile (26) aus eng benachbarten, lichtempfindlichen periodisch seriell abgetasteteten Punktsensoren an der gegenüberliegenden Wand angeordnet ist, wobei die Zeile (26) quer zur Bewegungsrichtung der Münzen (24) angeordnet ist und die Auswertevorrichtung entweder die Ausgangspegel der einzelnen Sensoren mit einem vorgegebenen Wert vergleicht oder die Ausgangspegel integriert und das Integral mit einem Sollwert vergleicht dadurch gekennzeichnet, daß die Auswertevorrichtung den Schatten eines Fadenähnlichen Fremdkörpers von dem Schatten einer Münze diskriminiert zwecks Erzeugung eines Rückgabesignals, wenn ein Fremdkörper erfaßt wird, wodurch die Münzvorrichtung Fadenähnliche Fremdkörper berührungslos erfasst.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die optische Sensoranordnung (26) im Einwurfbereich oder am Ende der Münzlaufbahn (30) angeordnet ist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Lichtquelle eine IR-LED (14) verwendet wird.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die IR-LED (14) in einer Ausbuchtung (38) der Haupt-bzw. Laufbahnträgerplatte (10, 12) angeordnet ist.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Sensorzeile (26) einschließlich Abfrageelektronik in einem Blockgehäuse (18) angeordnet ist und das Gehäuse (18) an der Außenseite der Laufbahnträgerplatte oder Hauptplatte angeordnet ist, wobei im Bereich der Pixelsensoren ein Schlitz (28) in der Platte geformt ist.
- Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Sensorzeile (52) und die Lichtquelle (14) in gegenüberliegenden Seiten eines Rahmens (50) angeordnet sind und eine getrennte Auswertevorrichtung (56) für die Ausgangssignale der Sensorzeile (52) am Rahmen (50) angeordnet ist.
- Vorrichtung nach einem der Ansprüche 1 bis 6, gekennzeichnet durch eine Regelschaltung für die Sensorzeile (26, 52), welche den Strom für die Lichtquelle (14) auf eine vorgegebene Ausgangsspannung für die Sensoren der Sensorzeile (26, 52) regelt.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Ausgangsspannungen der einzelnen Sensoren bzw. lichtempfindlichen Elemente unterhalb ihrer Sättigungsspannung liegen, wenn sie von der Lichtquelle (14) bestrahlt werden.
- Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß eine CCD-Zeile verwendet wird.
- Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß anstelle einer Punktsensorenzeile ein PSD verwendet wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4444105A DE4444105C2 (de) | 1994-12-10 | 1994-12-10 | Vorrichtung zur Erfassung eines fadenähnlichen Fremdkörpers in einer Münzvorrichtung |
DE4444105 | 1994-12-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0716400A1 EP0716400A1 (de) | 1996-06-12 |
EP0716400B1 true EP0716400B1 (de) | 1998-05-13 |
Family
ID=6535520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95117911A Expired - Lifetime EP0716400B1 (de) | 1994-12-10 | 1995-11-14 | Vorrichtung zur Erfassung eines fadenähnlichen Fremdkörpers in einer Münzvorrichtung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0716400B1 (de) |
DE (2) | DE4444105C2 (de) |
ES (1) | ES2117350T3 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19549407C2 (de) * | 1995-08-09 | 1999-09-23 | Nat Rejectors Gmbh | Münzvorrichtung |
DE60139953D1 (de) * | 2000-12-01 | 2009-10-29 | Mei Inc | Auf einem polarisierer basierender detektor |
Family Cites Families (7)
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 |
-
1994
- 1994-12-10 DE DE4444105A patent/DE4444105C2/de not_active Expired - Fee Related
-
1995
- 1995-11-14 ES ES95117911T patent/ES2117350T3/es not_active Expired - Lifetime
- 1995-11-14 DE DE59502166T patent/DE59502166D1/de not_active Expired - Lifetime
- 1995-11-14 EP EP95117911A patent/EP0716400B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59502166D1 (de) | 1998-06-18 |
DE4444105A1 (de) | 1996-06-13 |
ES2117350T3 (es) | 1998-08-01 |
DE4444105C2 (de) | 1998-07-02 |
EP0716400A1 (de) | 1996-06-12 |
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