EP0572847A1 - Détecteur de pièces de monnaie - Google Patents

Détecteur de pièces de monnaie Download PDF

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Publication number
EP0572847A1
EP0572847A1 EP93107938A EP93107938A EP0572847A1 EP 0572847 A1 EP0572847 A1 EP 0572847A1 EP 93107938 A EP93107938 A EP 93107938A EP 93107938 A EP93107938 A EP 93107938A EP 0572847 A1 EP0572847 A1 EP 0572847A1
Authority
EP
European Patent Office
Prior art keywords
coin
coil
circuit
oscillator
conductor
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.)
Granted
Application number
EP93107938A
Other languages
German (de)
English (en)
Other versions
EP0572847B1 (fr
Inventor
Thomas Seitz
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.)
IP-TPG HOLDCO Sarl
Electrowatt Technology Innovation AG
Original Assignee
Landis and Gyr Technology Innovation AG
Landis and Gyr Bussiness Support AG
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 Landis and Gyr Technology Innovation AG, Landis and Gyr Bussiness Support AG filed Critical Landis and Gyr Technology Innovation AG
Publication of EP0572847A1 publication Critical patent/EP0572847A1/fr
Application granted granted Critical
Publication of EP0572847B1 publication Critical patent/EP0572847B1/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
    • G07D5/08—Testing the magnetic or electric properties
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to an inductive coin detector and a method for its production of the type mentioned in the preamble of claim 1.
  • Such inductive coin detectors are suitable, for example, for the identification of coins in coin validators.
  • An inductive coin detector of the type mentioned in the preamble of claim 1 is known from GB-A 2'151'062.
  • the coin detector consists of a flat coil in the circuit of a high-frequency oscillator.
  • An alternating magnetic field emerging from the coil perpendicularly penetrates a coin channel.
  • a coin rolling through the alternating field in the coin channel changes the resonance frequency of the oscillator through the interaction of the coin with the alternating field.
  • the frequency deviation caused by the presence of the coin serves as a measure of the parameter to be measured, such as. B. diameter, alloy, presence in general etc.
  • the coil is wound from wire or made on a printed circuit board by etching a lamination of copper.
  • the rest of the high-frequency oscillator, which is situated further away, is connected to the coil via shielded feeder cables.
  • the invention has for its object to provide a low-interference, inexpensive inductive coin detector that is easy to install and can be arranged in the coin validator.
  • 1 means a coin channel in a coin validator, 2 a coin, 3 a coil, 4 a detector circuit, 5 a feed device and 6 an evaluation unit.
  • the supply device 6 is used for energy supply and is connected to the detector circuit 4 via supply lines 7 and to the evaluation unit 6 via supply lines 8.
  • a signal line 9 extends from the detector circuit 4 to the evaluation unit 6 for transmitting measurement signals.
  • the evaluation unit 6 analyzes the measurement signals in a predetermined manner and can release a service via a command line 10.
  • the coin validator is e.g. B. in a public telephone or in a vending machine installed and enables the service to be triggered by means of coins 2.
  • the coin validator comprises at least one inductive coin detector, which is formed from the coil 3 and the detector circuit 4 and as a scanning element on the coin channel 1 for measuring a predetermined size of the coin 2, such as the diameter of the coin 2, the type of coin alloy, etc., or for checking the presence of the Coin 2 in coin channel 1 is used.
  • the coil 3 has at least one flat spiral conductor arrangement 11, so that the coil 3 can be arranged on the coin channel 1 in a space-saving manner.
  • An alternating current in the conductor arrangement 11 of the coil 3 generates an alternating magnetic field which, in the direction of the coil axis 12 (FIG. 2), penetrates the coin channel 1 perpendicular to a running direction 13 of the coin 2, for example in such a way that the coil axis 12 is also parallel to the axis of the coin coin 2 moving past the coil 3 is aligned.
  • the coil 3 (FIG. 1) has two flat spiral conductor arrangements 11 and 11 ′ which are coaxially aligned on both sides on an insulating film 14 and which can be electrically connected to one another by means of a through-connection 16 through the center 15 of the coil 3.
  • the coil axis 12 shown in dashed lines is perpendicular to the plane of the conductor arrangement 11 or 11 'and penetrates the center 15.
  • the conductor arrangement 11 or 11' winds from the center 15 around the coil axis 12 to the periphery of the conductor arrangement 11 or 11 ' and ends in a coil connection 17 and 18, respectively.
  • Any electrical conductor material can be used for the conductor arrangement 11, 11 ', but copper is particularly inexpensive.
  • the two conductor arrangements 11 and 11 ' can be connected to a through connection 16 to form a flat two-layer coil 3, the windings of which consist of the conductor arrangements 11 and 11'.
  • both conductor arrangements 11 and 11 ' have the same winding sense on.
  • the detector circuit 4 is arranged on the insulating film 14 outside the conductor arrangement 11.
  • the coil connections 17, 18 of the two-layer coil 3 are connected to the detector circuit 4 via two short bridges 19, 19 ', one bridge 19' leading through the insulating film 14 to the other side to the coil connection 18.
  • the detector circuit 4 has connection surfaces for contacting, which are connected via connections 20 to the connection lugs 21 for the feed lines 7 (FIG. 1) and the signal line 9 (FIG. 1).
  • the coil 3 can also be made in one layer.
  • the insulating film 14 can only carry the conductor arrangement 11 on one side or only the one conductor arrangement 11 or 11 ′ is connected, the through-connection 16 being missing.
  • the bridges 19, 19 ′ end on the coil side in the center 15 and on the coil connection 17 or 18.
  • the coin detector is advantageously housed in a flat housing 22.
  • a stable, flat housing 22 can be produced inexpensively.
  • the two flat sides 23, 23 'of the housing 22 are penetrated perpendicularly by the coil axis 12.
  • the connection lugs 21 establish the connection to the feed lines 7 (FIG. 1) and the signal line 9 (FIG. 1) through the material of the housing 22. It is also possible to lead the supply lines 7 and the signal line 9 directly to the outside instead of the connection fields 21 as wire ends for direct connection to the supply device 5 (FIG. 1) and the evaluation unit 6 (FIG. 1), since there are already three wires for the necessary ones Lines 7, 9 between the coin detector and the power supply 5 and the evaluation unit 6 are sufficient.
  • the detector circuit 4 is glued to a substrate 24 made of conductor material and, as shown in FIG. 3, comprises an oscillator circuit 25 and a measuring circuit 26.
  • the oscillator circuit 25 in connection with the coil 3 (FIG. 1) forms an LC oscillator with the Coil 3 as an inductor. Examples of such LC oscillators are described in the book "Semiconductor Circuit Technology" by U. Tietze and Ch. Schenk, Springer-Verlag Berlin, 1978, ISBN 3-540-08628-5, pages 419 to 430, 4th edition.
  • the alternating current generated by the oscillator circuit 25 in the coil 3 effects the alternating magnetic field of the coin detector in the coin channel 1 (FIG. 1). Without a coin 2 (FIG.
  • the LC oscillator in the alternating magnetic field, the LC oscillator oscillates at a predetermined idle frequency f0. As soon as the material of the coin 2 draws energy from the alternating field, the frequency f of the LC oscillator changes.
  • the LC oscillator of the coin detector begins to oscillate, the inductance of the coil 3 and a capacitor of the oscillator circuit 25 connected in parallel with the coil 3 determining the frequency f0. Since the coil 3 and the capacitor in the oscillator circuit 25 can be manufactured with very tight tolerances, the idle frequency f stre scatters in a narrow band, so that tuning of the LC oscillator to the predetermined idle frequency 0 is unnecessary.
  • the coil 3 has an inductance of between 0.5 ⁇ H and 50 ⁇ H.
  • the two-layer coil 3 with a predetermined diameter of 14 mm of both conductor arrangements 11, 11 ' has an inductance of 2920 nH with a total of 20 turns.
  • the single-layer coil 3 has one conductor arrangement 11 of the same diameter and 10 turns only a quarter of the inductance, ie 730 nH.
  • the coils 3 have a quality factor Q in the range from 5 to 10.
  • the coin detector has the advantage that, because of the short bridges 19, 19 'between the oscillator circuit 25 and the coil 3, the LC oscillator can be constructed with little interference and because of the automatable manufacture, it can also be inexpensively constructed. In spite of the high frequencies f of the LC oscillator, the feed lines 7 and the signal line 9 do not emit any interfering electromagnetic waves which would impair the function of the coin validator and would further burden the LC oscillator.
  • the compact coin detector is easy to place in the coin validator on coin channel 1 and is characterized by low power consumption.
  • the coin detector can also be used generally as a sensor which detects an approach of a piece of metal with the alternating field of the coil 3.
  • the oscillator circuit 25 and the measuring circuit 26 can be implemented on a Si wafer chip in CMOS technology. This measure lowers the current consumption of the detector circuit 4 to less than 30 ⁇ A at a supply voltage of 5 V when the LCO oscillator with the single-layer coil 3 oscillates at the idle frequency f0 of approximately 16 MHz.
  • the insulating film 14 has the conductor arrangement 11 or 11 ′, the connecting tabs 21 and the substrate 24 on at least one side.
  • These conductor pieces 11, 17, 21 and 24 or 11, 11 ', 17, 18, 21 and 24 made of an electrical conductor material can be applied to the insulating film 14 on one or both sides in a printing process or by vapor deposition or deposition.
  • the step-by-step manufacture of the coin detectors is described below by way of example, the conductor pieces 11, 17, 21 and 24 or 11, 11 ', 17, 18, 21 and 24 are etched out of the conductor material laminated onto the insulating film 14 on one or both sides.
  • the electrical conductor material has a thickness of 0.01 mm to 0.15 mm or more. The thicker conductor material brings about an advantageous rigidity of the connecting lugs 21.
  • a tape 27 of a commercially available KAPTON (R) film 70 ⁇ m thick with a one- or both-sided layer of 17 ⁇ m copper can be used as the flexible insulating film 14.
  • the coil 3 is produced as part of the “lead frame” together with the substrate 24 and the connecting tabs 21 from the band 27.
  • the advantage of this method is its suitability for the automated manufacture of the coin detector, since all connections 16, 19, 19 ', 20 on the carrier sheet 30 can be carried out inexpensively by bonding thin wires if the detector circuit 4 is integrated on a semiconductor chip and the frequency-determining capacitor the oscillator circuit 25 is arranged as a separate component 25 'on the substrate 24 and is connected directly to the coil connections 17, 18.
  • the coin detector can be adjusted between method steps f) and g), the value of the idle frequency f0 measured at the LC oscillator being stored in the measuring circuit 26 for the calculation of the frequency deviation ⁇ f.
  • the manufacturing process can be for two-layer coils 3 are modified so that the conductor arrangements 11 are first produced on the belt 27 laminated on one side after the production steps a) to d). Subsequently, the conductor-free sides of two identical strips 27 treated in this way are aligned with the positioning holes 29, 29 'and joined to form a composite strip, the conductor arrangements 11 on both sides of the composite strip also being arranged coaxially and in the same winding direction.
  • the composite strip is processed in the following manufacturing steps e) to h) like a double-sided tape 27.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Pinball Game Machines (AREA)
  • Noodles (AREA)
  • Eye Examination Apparatus (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
EP93107938A 1992-06-03 1993-05-15 Détecteur de pièces de monnaie Expired - Lifetime EP0572847B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1782/92 1992-06-03
CH178292 1992-06-03

Publications (2)

Publication Number Publication Date
EP0572847A1 true EP0572847A1 (fr) 1993-12-08
EP0572847B1 EP0572847B1 (fr) 1998-08-26

Family

ID=4218484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107938A Expired - Lifetime EP0572847B1 (fr) 1992-06-03 1993-05-15 Détecteur de pièces de monnaie

Country Status (6)

Country Link
US (2) US5411126A (fr)
EP (1) EP0572847B1 (fr)
KR (1) KR0165135B1 (fr)
AT (1) ATE170312T1 (fr)
DE (1) DE59308911D1 (fr)
DK (1) DK0572847T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0918306A3 (fr) * 1997-11-19 1999-10-06 Tetrel Limited Systéme inductif de validation de piéces de monnaie et téléphone à paiement l'utilisant
DE10048290A1 (de) * 2000-09-29 2002-05-08 Balluff Gebhard Feinmech Induktiver Sensor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19781532B4 (de) * 1996-01-11 2008-01-17 De La Rue Cash Systems, Inc., Watertown Münzhandhabungsmaschine mit kreisförmiger Sortierplatte und Münzerkennung
ES2175441T3 (es) 1996-07-29 2002-11-16 Qvex Inc Procedimiento y aparato de validacion de monedas.
US6896826B2 (en) * 1997-01-09 2005-05-24 Advanced Technology Materials, Inc. Aqueous cleaning composition containing copper-specific corrosion inhibitor for cleaning inorganic residues on semiconductor substrate
JP2004227133A (ja) * 2003-01-21 2004-08-12 Internatl Currency Technologies Corp 硬貨受け取り器の検出装置
TWI227502B (en) 2003-09-02 2005-02-01 Ind Tech Res Inst Precise multi-pole magnetic components and manufacturing method thereof
JP5924686B2 (ja) * 2012-09-28 2016-05-25 株式会社日本コンラックス 硬貨処理装置
JP6992445B2 (ja) * 2017-11-27 2022-01-13 富士電機株式会社 硬貨検知用アンテナおよび硬貨処理装置
CN112406318B (zh) * 2020-11-24 2023-07-21 武汉先同科技有限公司 一种基于电感技术的墨量检测装置、方法及喷墨打印机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1532020A (fr) * 1967-07-21 1968-07-05 Scheidt & Bachmann Gmbh Dispositif de vérification et de comptage de pièces de monnaie dans des distributeurs automatiques
US3901368A (en) * 1974-03-11 1975-08-26 Lance T Klinger Coin acceptor/rejector
US4353453A (en) * 1980-04-10 1982-10-12 Atn Research & Development Corporation Valid coin acceptor for coin actuated apparatus
US4441602A (en) * 1981-12-02 1984-04-10 Joseph Ostroski Electronic coin verification mechanism
GB2174227A (en) * 1985-04-15 1986-10-29 Coin Controls Apparatus for discriminating between different metallic articles

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185947A (en) * 1959-11-16 1965-05-25 Arf Products Inductive module for electronic devices
US3576244A (en) * 1969-01-08 1971-04-27 Vendo Co Coin acceptor having resistivity and permeability detector
US4035695A (en) * 1974-08-05 1977-07-12 Motorola, Inc. Microelectronic variable inductor
US4494100A (en) * 1982-07-12 1985-01-15 Motorola, Inc. Planar inductors
US4574936A (en) * 1983-05-10 1986-03-11 Lance Klinger Coin accepter/rejector including symmetrical dual feedback oscillator
EP0146251B1 (fr) * 1983-11-04 1992-08-12 Mars Incorporated Dispositif de contrôle de validité de pièces de monnaie
US4678994A (en) * 1984-06-27 1987-07-07 Digital Products Corporation Methods and apparatus employing apparent resonant properties of thin conducting materials
JPH0744405Y2 (ja) * 1989-03-07 1995-10-11 ローム株式会社 プリント基板の切断装置
EP0500367A3 (en) * 1991-02-20 1993-07-21 Telkor (Proprietary) Limited Coil arrangement and static measuring device
US5133118A (en) * 1991-08-06 1992-07-28 Sheldahl, Inc. Surface mounted components on flex circuits

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1532020A (fr) * 1967-07-21 1968-07-05 Scheidt & Bachmann Gmbh Dispositif de vérification et de comptage de pièces de monnaie dans des distributeurs automatiques
US3901368A (en) * 1974-03-11 1975-08-26 Lance T Klinger Coin acceptor/rejector
US4353453A (en) * 1980-04-10 1982-10-12 Atn Research & Development Corporation Valid coin acceptor for coin actuated apparatus
US4441602A (en) * 1981-12-02 1984-04-10 Joseph Ostroski Electronic coin verification mechanism
GB2174227A (en) * 1985-04-15 1986-10-29 Coin Controls Apparatus for discriminating between different metallic articles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0918306A3 (fr) * 1997-11-19 1999-10-06 Tetrel Limited Systéme inductif de validation de piéces de monnaie et téléphone à paiement l'utilisant
US6539083B1 (en) 1997-11-19 2003-03-25 Marconi Communications Limited Inductive coin validation system and payphone using such system
DE10048290A1 (de) * 2000-09-29 2002-05-08 Balluff Gebhard Feinmech Induktiver Sensor
DE10048290C2 (de) * 2000-09-29 2003-06-12 Balluff Gmbh Induktiver Sensor
US6734665B2 (en) 2000-09-29 2004-05-11 Balluff Gmbh Inductive sensor having a sensor coil in the form of a structured conductive layer
DE10048290C5 (de) * 2000-09-29 2005-12-08 Balluff Gmbh Induktiver Sensor

Also Published As

Publication number Publication date
DK0572847T3 (da) 1999-05-25
KR940001014A (ko) 1994-01-10
US5411126A (en) 1995-05-02
KR0165135B1 (ko) 1999-03-20
US5575057A (en) 1996-11-19
EP0572847B1 (fr) 1998-08-26
DE59308911D1 (de) 1998-10-01
ATE170312T1 (de) 1998-09-15

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