EP0607624B1 - Détecteur de déclenchement électrique pour appareil de vérification de pièces de monnaie alimenté par batterie - Google Patents

Détecteur de déclenchement électrique pour appareil de vérification de pièces de monnaie alimenté par batterie Download PDF

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Publication number
EP0607624B1
EP0607624B1 EP93121157A EP93121157A EP0607624B1 EP 0607624 B1 EP0607624 B1 EP 0607624B1 EP 93121157 A EP93121157 A EP 93121157A EP 93121157 A EP93121157 A EP 93121157A EP 0607624 B1 EP0607624 B1 EP 0607624B1
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EP
European Patent Office
Prior art keywords
transistor
sensor
switch
oscillator
capacitor
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
EP93121157A
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German (de)
English (en)
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EP0607624A1 (fr
Inventor
Wilfried Meyer
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
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Publication date
Application filed by National Rejectors Inc GmbH filed Critical National Rejectors Inc GmbH
Publication of EP0607624A1 publication Critical patent/EP0607624A1/fr
Application granted granted Critical
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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

Definitions

  • the invention relates to an inductive switch-on sensor for battery-operated coin validators according to the preamble of claim 1.
  • a switch-on sensor is e.g. known from US-A-5 027 935.
  • Battery operated electronic coin validators are to be designed in such a way that they have a low power requirement, both during the operating phase and during the idle phase. It is therefore also known to design such coin validators in such a way that they are "woken up" only when required. In the idle state, the parts and components of the electronic coin validator are inactive. On in this way, the power requirement during the rest phase can be minimized.
  • Such an electronic coin validator is awakened with the aid of a switch-on sensor, which is also known and can work inductively. It determines when a coin has been inserted into the coin validator. This results in damping from which a switch-on signal can be derived. It is essential for such switch-on sensors that they can work in a wide temperature range. It extends between -30 and + 80 ° C. Now it would be conceivable to use a so-called IC for this purpose, with which temperature compensation would be easily achievable. However, an IC cannot be used due to power consumption. The current requirement should be less than 10 ⁇ A.
  • the invention is therefore based on the object of providing an inductive switch-on sensor for battery-operated coin validators which has low power consumption and which effectively generates a switch-on signal over a large temperature range.
  • a transistor in an emitter follower circuit is connected to the oscillator. It charges a capacitor to the lower peak value of the output voltage of the oscillator, which is present at the base-emitter path.
  • a resistor connected in parallel with the capacitor discharges the capacitor just enough that the capacitor is recharged at each lower peak of the oscillator output voltage.
  • the oscillator voltage collapses by a few millivolts, and the capacitor is no longer charged over a number of periods (e.g. 10 to 50 ms). During this time, the transistor is de-energized and a wake-up signal in the form of a so-called LOW signal can be generated via a further capacitor.
  • a so-called Collpitt oscillator is provided.
  • a mosfet is also provided according to the invention.
  • one embodiment of the invention provides that the collector of the transistor is connected to the base of a further transistor acting as an amplifier, which is connected in series with the capacitor is.
  • the transistor generating the wake-up signal is preferably also a field effect transistor, the gate of which is connected to the collector of the transistor, a point between a resistor and a further capacitor being connected to the latter, which series connection to the battery voltage is laid. If the transistor is de-energized, the potential at the gate changes and the desired wake-up signal can be generated.
  • the single figure shows a circuit diagram of the switch-on sensor according to the invention.
  • a transistor T1 which is formed by a MOSFET, together with capacitors C1 and C2 and a sensor coil L, forms a capacitively coupled Collpitts oscillator.
  • the oscillator is connected via a parallel connection of a capacitor C3 and a resistor R1 and via a resistor R2 to the terminals 10, 12 of a battery which belongs to an electronic coin validator (not shown).
  • a transistor T2, which is also connected to the terminals 10, 12 with resistors R3, R5 and R6 connected in series, is arranged in an emitter follower circuit, so that its base lies at the output of the oscillator.
  • a capacitor C4 is connected in parallel with the resistor R3.
  • the collector of transistor T2 lies at the base of a further transistor T3, the collector of which is above a resistor R8 is connected to a junction of resistor R3 and capacitor C4.
  • the emitter of the transistor T3 is on the one hand at a connection point between the resistors R5 and R6 and on the other hand at the base of a further transistor T4, the collector of which is connected to a connection point between a resistor R7 and a capacitor C5, which are connected in series at the terminals 10, 12 of the battery.
  • This connection point is also located at the gate of a field effect transistor T5, a switch-on or wake-up signal appearing between the drain and source of the transistor T5.
  • the circuit arrangement shown works as follows.
  • the capacitor C4 is discharged via the resistor R3 just enough that the capacitor C4 is recharged at each lower peak of the oscillator output voltage. If the sensor coil L is damped by a coin, the oscillator voltage collapses by a few mV and the capacitor C4 is no longer recharged over many periods, for example 10 to 50 ms.
  • transistors T2, T3 and T4 become currentless and the voltage on capacitor C5 increases. As a result, the transistor T5 becomes conductive and generates the wake-up signal.
  • the absolute is in the circuit shown Oscillator output voltage level not significant. All that matters is the change in level when a coin approaches.
  • the described mode of operation of the circuit makes it possible to process oscillator levels of 0.7 to 2 volts without the sensitivity of the circuit changing significantly. Another advantage is that if the oscillator fails, for example in the event of extreme condensation, no continuous wake-up signal is generated. Clamping a coin in the area of the switch-on sensor also does not lead to a continuous wake-up signal.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electronic Switches (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Claims (5)

  1. Détecteur à enclenchement, fonctionnant par induction, pour appareil de contrôle de pièces de monnaie alimenté par pile, comportant un oscillateur (T1, C1, C2, L) dont le signal de sortie change quand une pièce de monnaie traverse la zone du détecteur,
       caractérisé en ce qu'un premier condensateur (C4), pouvant se décharger à travers une première résistance (R3), est chargé périodiquement sous commande d'un premier transistor (T2) raccordé à l'oscillateur (T1, C1, C2, L) en émetteur-suiveur, de telle façon que le premier transistor (T2), en cas de diminution de la tension de l'oscillateur, ne passe plus de courant, et qu'un deuxième transistor (T5), raccordé à la tension de batterie et émettant un signal d'enclenchement, est exité par le premier transistor (T2).
  2. Détecteur d'enclenchement suivant la revendication 1, caractérisé en ce qu'il est prévu un oscillateur "Collpitts".
  3. Détecteur d'enclenchement suivant la revendication 2, caractérisé en ce que l'oscillateur comporte un transistor à effet de champ (mosfet).
  4. Détecteur d'enclenchement suivant l'une des revendications 1 à 3, caractérisé en ce que le collecteur du premier transistor (T2) est relié à la base d'un troisième transistor (T3) agissant comme amplificateur, qui est branché en série avec le premier condensateur (C4).
  5. Détecteur d'enclenchement suivant l'une des revendications 1 à 4, caractérisé en ce que le deuxième transistor est un transistor à effet de champ, dont la grille est reliée à un point commun à un deuxième condensateur (C5) et à une deuxième résistance (R7), montés en série sur la tension de batterie, ce point recevant le signal de sortie produit sur le collecteur du premier transistor (T2), ou un signal de sortie correspondant à ce signal.
EP93121157A 1993-01-21 1993-12-31 Détecteur de déclenchement électrique pour appareil de vérification de pièces de monnaie alimenté par batterie Expired - Lifetime EP0607624B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4301530A DE4301530C1 (de) 1993-01-21 1993-01-21 Induktiver Einschaltsensor für batteriebetriebene Münzprüfer
DE4301530 1993-01-21

Publications (2)

Publication Number Publication Date
EP0607624A1 EP0607624A1 (fr) 1994-07-27
EP0607624B1 true EP0607624B1 (fr) 1996-02-07

Family

ID=6478628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93121157A Expired - Lifetime EP0607624B1 (fr) 1993-01-21 1993-12-31 Détecteur de déclenchement électrique pour appareil de vérification de pièces de monnaie alimenté par batterie

Country Status (4)

Country Link
US (1) US5454463A (fr)
EP (1) EP0607624B1 (fr)
DE (2) DE4301530C1 (fr)
ES (1) ES2085101T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1193656A2 (fr) 2000-09-29 2002-04-03 WH Münzprüfer Dietmar Trenner GmbH Circuit de commutation pour la génération d'un signal de démarrage pour sélecteur de pièces de monnaie alimenté par piles

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711694U1 (de) * 1997-07-03 1997-09-18 National Rejectors, Inc. Gmbh, 21614 Buxtehude Optischer Sensor in Münzprüfanordnungen
US6298973B1 (en) 1999-11-10 2001-10-09 Parker Engineering & Manufacturing Co., Inc. Multiple coin analyzer system
GB2401980B (en) * 2003-03-14 2006-02-15 Int Currency Tech Power control circuit for use in a vending machine

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1483192A (en) * 1973-11-22 1977-08-17 Mars Inc Arrival sensor
US4334604A (en) * 1979-03-15 1982-06-15 Casino Investment Limited Coin detecting apparatus for distinguishing genuine coins from slugs, spurious coins and the like
FR2497958A1 (fr) * 1981-01-09 1982-07-16 Thomson Csf Dispositif de determination de l'instant d'arrivee d'impulsions, utilisation dans un equipement de mesure de distances et equipement de mesure comportant un tel dispositif
GB2093620B (en) * 1981-02-11 1985-09-04 Mars Inc Checking coins
US4460003A (en) * 1981-08-21 1984-07-17 Mars, Inc. Coin presence sensing apparatus
DE3486213T2 (de) * 1983-11-04 1994-01-13 Mars Inc Münzprüfer.
DE8624368U1 (de) * 1986-09-11 1988-06-09 National Rejectors Inc. Gmbh, 2150 Buxtehude Schaltungsvorrichtung für batteriebetriebene elektronische Münzprüfer
US4895238A (en) * 1987-04-16 1990-01-23 Pom, Incorporated Coin discriminator for electronic parking meter
JPH01224890A (ja) * 1988-03-04 1989-09-07 Sanden Corp 硬貨識別装置
US4926458A (en) * 1988-05-26 1990-05-15 Mars Incorporated Low power control apparatus for a coin operated telephone
US4979208A (en) * 1988-06-29 1990-12-18 Mars Incorporated Method and apparatus for electronic payphone open switch interval management
US5036966A (en) * 1989-06-12 1991-08-06 Kaspar Wire Works, Inc. Newspaper vending rack coin box incorporating a retrofit electronic coin mechanism
US5007520A (en) * 1989-06-20 1991-04-16 At&T Bell Laboratories Microprocessor-controlled apparatus adaptable to environmental changes
US5184707A (en) * 1989-07-24 1993-02-09 Duncan Industries Parking Control Systems Corp. Coin operated timing mechanism
US5027935A (en) * 1989-12-26 1991-07-02 At&T Bell Laboratories Apparatus and method for conserving power in an electronic coin chute
EP0556278B2 (fr) * 1990-11-07 2002-05-22 Mars Incorporated Procede et appareil destines a un distributeur automatique fonctionnant avec piles et de faible puissance
US5293980A (en) * 1992-03-05 1994-03-15 Parker Donald O Coin analyzer sensor configuration and system
US5360095A (en) * 1992-04-07 1994-11-01 Pom Incorporated Power conserving electronic parking meter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1193656A2 (fr) 2000-09-29 2002-04-03 WH Münzprüfer Dietmar Trenner GmbH Circuit de commutation pour la génération d'un signal de démarrage pour sélecteur de pièces de monnaie alimenté par piles
DE10049758A1 (de) * 2000-09-29 2002-04-18 Trenner D Wh Muenzpruefer Schaltungsanordnung zur Erzeugung eines Einschaltsignals für batteriebetriebene Münzprüfer
DE10049758B4 (de) * 2000-09-29 2004-07-22 Walter Hanke Mechanische Werkstätten GmbH & Co KG Schaltungsanordnung zur Erzeugung eines Einschaltsignals für batteriebetriebene Münzprüfer

Also Published As

Publication number Publication date
US5454463A (en) 1995-10-03
DE59301597D1 (de) 1996-03-21
ES2085101T3 (es) 1996-05-16
DE4301530C1 (de) 1994-06-30
EP0607624A1 (fr) 1994-07-27

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