EP0889447B1 - Optischer Sensor in Münzprüfanordnungen - Google Patents
Optischer Sensor in Münzprüfanordnungen Download PDFInfo
- Publication number
- EP0889447B1 EP0889447B1 EP98108480A EP98108480A EP0889447B1 EP 0889447 B1 EP0889447 B1 EP 0889447B1 EP 98108480 A EP98108480 A EP 98108480A EP 98108480 A EP98108480 A EP 98108480A EP 0889447 B1 EP0889447 B1 EP 0889447B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical
- optical sensor
- electronic switch
- transistor
- coin
- 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
Images
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
Definitions
- the invention relates to an optical sensor in coin testing arrangements according to the preamble of claim 1 See DE-A-3416045).
- Coin validation arrangements several sensors are required that detect the presence report a coin, for example when entering a channel leading to the checkout z. B. to generate a so-called. Cashier signal.
- Accepting multiple coins Coin testers are also controlled by so-called sorting flaps by presence sensors. It is also known to fill the level in so-called coin tubes in money changers monitor with sensors. It is also known to have such presence sensors run as optical sensors. This is usually a light source and a photoelectric receiver is provided, the output signal of the photoelectric Depends on the presence of a coin in the light path.
- the optical transmitter is mostly a light emitting diode (LED) educated.
- a light-sensitive semiconductor is usually used as the optical receiver, for example a photosensitive transistor.
- the invention has for its object an optical sensor for coin testing arrangements to create that reduces energy consumption and safer against Incident light is.
- At least two are optical Transmitter operated in pulses via a corresponding electronic switch, by connecting it to an energy storage device at intervals via an electronic switch be connected.
- the energy store is preferably a capacitor that between the control pulses for the electronic switch or the optical Transmitter generated flash pulses is charged.
- the control of the electronic Switch is made by a microprocessor, which is already in such Coin checking arrangements is provided. This also takes over the query of the optical Receiver, and expediently such that the processor the query circuit controls so that it only during the transmission pulse or during a Time when the optical transmitter emits its flash is sensitive.
- the pulsed operation of the optical transmitters saves a lot of energy, so that the sensor according to the invention in particular in battery-operated Coin checking arrangements is of great advantage.
- the sensor according to the invention By querying only during the The operating time of the optical transmitters is largely switched off.
- the optical sensor according to the invention therefore offers high operational reliability.
- optical transmitters can be connected in series, which are then the same Generate a light pulse by either one or more photosensitive receivers is received.
- optical transmitters with assigned electronic switch and energy storage arranged such that the one electronic switch with the rising and the other is operated with the falling edge of a control pulse.
- This arrangement has the advantage that only one control line for at least two optical Transmitter is required.
- Control lines of a processor tend to use them as sparingly as possible. This is achieved with the invention.
- Two photosensitive diodes 10, 12 in Fig. 1 are in series with a capacitor 14 or 16.
- the capacitors 14, 16 are connected via a resistor 18 or 20 on a common current source 22.
- a transistor 24 or 26 switched in parallel with the diodes 10, 12 in parallel with the diodes 10, 12 in parallel with a transistor 24 or 26 switched.
- a resistor 28 is connected in parallel with the diode 10 and in parallel a diode 30 connected in the opposite direction to the diode 12.
- the base of transistor 24 is through a resistor 32 to an output line of a processor (not shown) connected, which emits control pulses periodically at intervals.
- Such a control pulse is shown in Fig. 3a and designated 34.
- the duration of the pulses 34 is e.g. a few microseconds and their distance e.g. 20 to 30 microseconds.
- the pulse 34 has a rising edge 36 and a falling edge Flank 38.
- both transistors 24, 26 are blocked. Appears a Pulse 34, transistor 24 turns on, causing the previously charged capacitor 14 can discharge and generate a short current pulse in the diode 10, whereby a light pulse is emitted. With the falling edge 38 blocks Transistor 24, and capacitor 14 is recharged. The base current opens the transistor 26 and now enables the discharge of the capacitor 16, which in addition leads that the light-emitting diode 12 now emits a light pulse.
- the receiver circuit is shown. It comprises two parallel ones photosensitive transistors 40, 42.
- the operation of the circuit is like follows. In the idle state, a transistor 44 should be conductive. His collector is over one Resistor 46 connected to a current source 22. Its base is over one Resistor 48 also on this current source.
- the collector of a transistor 50 whose base is connected to the collector of transistor 44 is due to described operating mode on supply voltage.
- the collector of the transistor 50 is through a capacitor 52 with a point between the base of the transistor 44 and the resistor 48 connected. Has the voltage across capacitor 52 Supply voltage level minus the voltage drop at the base emitter section of transistor 50.
- FIG. 3 shows in FIG. 3b which pulses at the output 54 of the circuit arrangement 2 occur when the distance between the diodes 12 and 10 or 42 and 40 is not covered by a coin or the like. It is easy to see that a first pulse 56 by the rising edge 36 and a second Impulse was triggered by the falling edge 58.
- the processor can thus determine whether at the time of pulse 36, 38 (rising and falling edge), a pulse on the Receiver side is generated. Is this e.g. for the one receiving transistor 40 or 42 not the case, for example by covering the diode 10, only a pulse 58a is generated (Fig 3c). On the other hand, if diode 12 is covered, a pulse 56b is generated (Fig. 3d).
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Testing Of Coins (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Electronic Switches (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Description
- Fig. 1
- zeigt eine Schaltungsanordnung für einen optischen Sender nach der Erfindung.
- Fig. 2
- zeigt eine Schaltungsanordnung für einen optischen Empfänger für die Sendeschaltung nach Fig. 1.
- Fig. 3
- zeigt ein Impulsdiagramm für die Schaltungsanordnungen nach den Fig. 1 und 2.
Claims (6)
- Optischer Sensor in Münzprüfanordnungen zur Feststellung der Anwesenheit einer Münze, mit mindestens zwei optischen Sendern, die von einer Stromquelle gespeist sind und mindestens einem optischen Empfänger, der mit einer elektronischen Empfangs- und Abfrageschaltung verbunden ist, dadurch gekennzeichnet, daß die optischen Sender (10, 12) über jeweils einen elektronischen Schalter (24, 26) mit jeweil einem elektrischen Energiespeicher (14, 16) verbindbar sind, die elektronischen Schalter (24, 26) von Steuerimpulsen eines Mikroprozessors betätigt sind, wobei ferner die Energiespeicher (14, 16) so geschaltet sind, daß sie zwischen den Steuerimpulsen geladen werden und wobei die optischen Sender (10, 12) mit elektronischem Schalter (24, 26) und Energiespeicher (14, 16) angeordnet sind derart, daß der eine elektronische Schalter mit der ansteigenden und der andere elektronische Schalter mit der abfallenden Flanke (36, 38) eines Steuerimpulses (34) betätigt wird.
- Optischer Sensor nach Anspruch 1, dadurch gekennzeichnet, daß die Empfangsund Abfrageschaltung des optischen Empfängers (40, 42) so ausgebildet ist, daß der Empfänger, gesteuert durch den Prozessor, nur periodisch während des Intervalls abgefragt wird, in der die optischen Sender einen Sendeimpuls abgeben.
- Optischer Sensor nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Energiespeicher (14, 16) ein Kondensator und/oder der elektronische Schalter ein Transistor (24, 26) ist.
- Optischer Sensor nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der optische Sender (10, 12) von einer lichtempfindlichen Diode gebildet ist.
- Optischer Sensor nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß mehrere optische Sender in Reihe geschaltet sind.
- Optischer Sensor nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zwei oder mehr optische Empfänger (40, 42) parallel geschaltet und über eine gemeinsame Ausgangsleitung (54) mit dem Prozessor verbunden sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29711694U DE29711694U1 (de) | 1997-07-03 | 1997-07-03 | Optischer Sensor in Münzprüfanordnungen |
DE29711694U | 1997-07-03 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0889447A2 EP0889447A2 (de) | 1999-01-07 |
EP0889447A3 EP0889447A3 (de) | 1999-10-13 |
EP0889447B1 true EP0889447B1 (de) | 2003-06-18 |
Family
ID=8042573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98108480A Expired - Lifetime EP0889447B1 (de) | 1997-07-03 | 1998-05-09 | Optischer Sensor in Münzprüfanordnungen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0889447B1 (de) |
DE (2) | DE29711694U1 (de) |
ES (1) | ES2198616T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69819979T2 (de) | 1997-09-01 | 2004-07-29 | Kanzaki Kokyukoki Mfg. Co., Ltd., Amagasaki | Getriebe für ein Arbeitsfahrzeug |
GB2401980B (en) * | 2003-03-14 | 2006-02-15 | Int Currency Tech | Power control circuit for use in a vending machine |
ES2387027B1 (es) * | 2011-02-15 | 2013-06-24 | Ojmar, S.A. | Cerradura con deteccion optica de moneda. |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2055134A1 (de) * | 1970-11-10 | 1972-05-18 | Pruemm G | Elektronischer Münzprüfer |
DE3416045A1 (de) * | 1984-04-30 | 1985-10-31 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur erkennung von muenzen bei selbstverkaeufern |
DE4301530C1 (de) * | 1993-01-21 | 1994-06-30 | Nat Rejectors Gmbh | Induktiver Einschaltsensor für batteriebetriebene Münzprüfer |
US5673781A (en) * | 1995-11-21 | 1997-10-07 | Coin Acceptors, Inc. | Coin detection device and associated method |
-
1997
- 1997-07-03 DE DE29711694U patent/DE29711694U1/de not_active Expired - Lifetime
-
1998
- 1998-05-09 DE DE59808736T patent/DE59808736D1/de not_active Expired - Lifetime
- 1998-05-09 ES ES98108480T patent/ES2198616T3/es not_active Expired - Lifetime
- 1998-05-09 EP EP98108480A patent/EP0889447B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE29711694U1 (de) | 1997-09-18 |
EP0889447A3 (de) | 1999-10-13 |
EP0889447A2 (de) | 1999-01-07 |
DE59808736D1 (de) | 2003-07-24 |
ES2198616T3 (es) | 2004-02-01 |
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