EP0356582A1 - Gegenstandsidentifizierung - Google Patents

Gegenstandsidentifizierung Download PDF

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Publication number
EP0356582A1
EP0356582A1 EP88307285A EP88307285A EP0356582A1 EP 0356582 A1 EP0356582 A1 EP 0356582A1 EP 88307285 A EP88307285 A EP 88307285A EP 88307285 A EP88307285 A EP 88307285A EP 0356582 A1 EP0356582 A1 EP 0356582A1
Authority
EP
European Patent Office
Prior art keywords
objects
frequencies
resonant
resonant frequencies
resonance
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.)
Withdrawn
Application number
EP88307285A
Other languages
English (en)
French (fr)
Inventor
Philip Edward Stephens
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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
Priority to GB8702473A priority Critical patent/GB2200778B/en
Application filed by General Electric Co PLC filed Critical General Electric Co PLC
Priority to EP88307285A priority patent/EP0356582A1/de
Publication of EP0356582A1 publication Critical patent/EP0356582A1/de
Withdrawn legal-status Critical Current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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
    • G07C3/14—Quality control systems

Definitions

  • This invention is concerned with apparatus for classifying objects.
  • At present such apparatus identifies coins or classifies components by measuring their dimensions and physical qualities such as weight, and other features such as the presence of a knurled rim.
  • Each valid coin type or classification of component will have a set of values for these qualities so the identity of each coin or classification of each object can be deduced from its values for these qualities.
  • This invention provides apparatus for classifying an object as being in one or none of a plurality of different classes of objects, each class of object being uniquely distinguished by a resonant frequency; including means for driving the object into resonance, means for sensing a resonance frequency of the object and means for comparing the resonant frequency of the object with the resonant frequencies of the classes of objects.
  • Another aspect of this invention provides apparatus for classifying an object as being in one or none of a plurality of different classes of objects, each class of object being distinguished by frequency charateristics of its resonation; including means for causing the object to resonate, means for sensing the frequency characteristics of the object and means for comparing the sensed characteristics with stored characteristics of the said different classes of objects.
  • a coin 1 is inserted through a slot 2 by a customer.
  • the term coin is used to mean any coin or object similar enough to a coin to be possibly mistaken for one.
  • the coin then rolls down a chute 3.
  • the coin 1 drops from the end of the chute 3 onto a metal block 4.
  • the coin 1 will always land at the same point on the block 4, this position being determined by the profile and position of the chute 3.
  • a coin 1A is shown in this position.
  • a microphone 5 is positioned adjacent to the coin landing point, and a piezo-electric transducer 6 is attached to the bottom of the block 4.
  • the coin 1 When a coin 1 lands on the metal block 4 the coin 1 will vibrate at its resonant frequencies and a shock wave will be generated in the block 4.
  • the shock wave in the block 4 will cause the piezo-electric transducer 6 to generate a signal while the vibration of the coin 1 causes the microphone 5 to produce signals having relative amplitudes and frequencies equivalent to those of the sounds produced by the vibration of the coin 1.
  • each type of coin 1 will have a set of resonant frequencies dependent on the diameter, thickness and metallurgical make up of the coin 1, and also on the shape of non-circular coins.
  • coin 1 The value of coin 1 can be deduced from its mass and resonant frequencies.
  • the signals produced by the microphone 5 are supplied to a number of bandpass filters 7A, 7B, etc. to 7N.
  • Each bandpass filter has a different pass band including at least one resonant frequency of one type of valid coin.
  • the filtered signals from bandpass filters 7A to 7N and the signals produced by the piezo-electric transducer 6 are fed to the processor 8.
  • the processor 8 uses these signals to determine whether the coin 1 is a valid acceptable coin or not and if it is what value coin it is by measuring the amplitude of the signal produced by the transducer 6 and by comparing the relative amplitudes of the signal passed by the filters 7A to 7N and then comparing these with a look up table stored in a memory 18. In response to instructions found in this look up table, the processor 8 produces signals on a line 9 to control the destination of the coin 1, which may be a number of storage areas or a reject slot (not shown) depending on the coins validity and value and produces signals on a line 10 which inform a processor controlling the vending machine of the value of the coin so that it can control vending accordingly.
  • the processor 8 can be normally switched off except for a rising edge detector looking for a rising edge in the signals from the piezo-electric transducer 6 and arranged to switch on the rest of the system when such a rising edge is detected.
  • the castings 11 are carried along a conveyor 12 which drops them onto a metal block 4.
  • the conveyor 12 and the block 4 are arranged so that all of the castings 11 will strike the metal block 4 in the same spot with the same orientation.
  • a microphone 5 is placed adjacent to the spot where the castings 11 will land and a piezo-electric transducer 6 is attached to the bottom of the block 4.
  • a piezo-electric transducer 6 is attached to the bottom of the block 4.
  • the signals produced by the microphone 5 and the transducer 6 are supplied to a processor 13. On receiving a signal from the transducer 6 the processor 13 prepares to receive a signal from the microphone 5, the processor 13 digitally records a portion of the signals produced by the microphone 5.
  • the signals recorded by the processor 13 are then compared by a comparator 14 with signals recorded in a memory 15.
  • the signals stored in the memory 15 are those produced when a perfect casting is dropped onto the block 4. These signals are placed in the memory 15 during the setting up of the system by the processor 13 feeding the signals it records to the memory 15,instead of the comparator 14, when an ideal or perfect casting that has been checked by direct physical measurement is dropped onto the block 4.
  • the comparator 14 If the correlation between the signals recorded by the processor 13 and those stored in the memory 15 is above a preset level the comparator 14 signals along a line 16 and the casting 11 continues the manufacturing process, if the correlation is not above this level the comparator 14 signals along a line 17 and the casting 11 is diverted to a reject bin. Machinery for carrying out such routing of components is well known and will not be described here.
  • the driving of objects to resonance could alternatively be carried out in many ways, other than described, for example phot-accoustically by means of a modulated laser beam.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Quality & Reliability (AREA)
  • Testing Of Coins (AREA)
EP88307285A 1987-02-04 1988-08-05 Gegenstandsidentifizierung Withdrawn EP0356582A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8702473A GB2200778B (en) 1987-02-04 1987-02-04 Object identification
EP88307285A EP0356582A1 (de) 1988-08-05 1988-08-05 Gegenstandsidentifizierung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88307285A EP0356582A1 (de) 1988-08-05 1988-08-05 Gegenstandsidentifizierung

Publications (1)

Publication Number Publication Date
EP0356582A1 true EP0356582A1 (de) 1990-03-07

Family

ID=8200165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88307285A Withdrawn EP0356582A1 (de) 1987-02-04 1988-08-05 Gegenstandsidentifizierung

Country Status (1)

Country Link
EP (1) EP0356582A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138018C1 (de) * 1991-11-19 1992-11-05 National Rejectors Inc. Gmbh, 2150 Buxtehude, De
ES2125158A1 (es) * 1995-12-22 1999-02-16 Azkoyen Ind Sa Selector de monedas.
WO2014147413A1 (en) * 2013-03-22 2014-09-25 Jeremy Ross Nedwell A device for determining the characteristic impedance spectrum of a token

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543930A (en) * 1968-08-19 1970-12-01 American Mach & Foundry Metal object separation system
WO1983000400A1 (en) * 1981-07-23 1983-02-03 Meyer, Peter A procedure for classification of coins according to their mechanical elasticity
EP0184393A2 (de) * 1984-12-05 1986-06-11 Mars Incorporated Münzprüfvorrichtung
CH656240A5 (en) * 1984-05-04 1986-06-13 Claude Eric Jaquet Method of recognising the value of a coin and electronic device for implementing it
EP0219574A2 (de) * 1985-10-16 1987-04-29 Telefonica De Espana, S.A. Verfahren zum Identifizieren von Münzen
GB2200778A (en) * 1987-02-04 1988-08-10 Gen Electric Co Plc Object identification

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543930A (en) * 1968-08-19 1970-12-01 American Mach & Foundry Metal object separation system
WO1983000400A1 (en) * 1981-07-23 1983-02-03 Meyer, Peter A procedure for classification of coins according to their mechanical elasticity
CH656240A5 (en) * 1984-05-04 1986-06-13 Claude Eric Jaquet Method of recognising the value of a coin and electronic device for implementing it
EP0184393A2 (de) * 1984-12-05 1986-06-11 Mars Incorporated Münzprüfvorrichtung
EP0219574A2 (de) * 1985-10-16 1987-04-29 Telefonica De Espana, S.A. Verfahren zum Identifizieren von Münzen
GB2200778A (en) * 1987-02-04 1988-08-10 Gen Electric Co Plc Object identification

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138018C1 (de) * 1991-11-19 1992-11-05 National Rejectors Inc. Gmbh, 2150 Buxtehude, De
ES2125158A1 (es) * 1995-12-22 1999-02-16 Azkoyen Ind Sa Selector de monedas.
WO2014147413A1 (en) * 2013-03-22 2014-09-25 Jeremy Ross Nedwell A device for determining the characteristic impedance spectrum of a token
US9933379B2 (en) 2013-03-22 2018-04-03 Jeremy Ross Nedwell Device for determining the characteristic impedance spectrum of a token

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): AT BE CH DE ES FR GR IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19900908