EP0224946B1 - Method for identifying coins - Google Patents

Method for identifying coins Download PDF

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Publication number
EP0224946B1
EP0224946B1 EP86201826A EP86201826A EP0224946B1 EP 0224946 B1 EP0224946 B1 EP 0224946B1 EP 86201826 A EP86201826 A EP 86201826A EP 86201826 A EP86201826 A EP 86201826A EP 0224946 B1 EP0224946 B1 EP 0224946B1
Authority
EP
European Patent Office
Prior art keywords
coin
counter
measurements
signal
attenuation
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
EP86201826A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0224946A2 (en
EP0224946A3 (en
Inventor
Kai Börje Hansen
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.)
Alcatel Kirk AS
Original Assignee
Alcatel Kirk AS
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 Alcatel Kirk AS filed Critical Alcatel Kirk AS
Priority to AT86201826T priority Critical patent/ATE99816T1/de
Publication of EP0224946A2 publication Critical patent/EP0224946A2/en
Publication of EP0224946A3 publication Critical patent/EP0224946A3/en
Application granted granted Critical
Publication of EP0224946B1 publication Critical patent/EP0224946B1/en
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

Definitions

  • the present invention relates to a method for identifying coins including guidance of a coin through a passage in which certain properties of the coin are measured by an electromagnetic device, and where a number of measurements are taken at different positions of the coin within the passage, including at least two electromagnetic measurements, representing certain attenuations of a rest mode signal delivered from the electromagnetic device, at positions determined by coin edge sensing means.
  • coin filters are previously known from e.g.
  • a coin filter which is independent of the time it takes for a coin to pass a detector. It is simple in that it uses only one set of electromagnetic coils for taking a plurality of successive electromagnetic measurements of each coin. The coin positions at which the measurements are taken are determined by the coin itself.
  • the coin interrupts a number of light channels 3, 4, 5 before passing the center of pair of coils 6.
  • the reduction of the coupling between coils are measured a number of times with the coin in different positions controlled by the light channels.
  • a sinusoidal signal E is emitted by one coil CE.
  • CE coils
  • the amplitude of the received signal R is determined by the coupling factor of the two coils.
  • the received signal is attenuated.
  • the difference in amplitude (attenuation Ai) on the received signal is the results (A1, A2, A3, ... An and Amax) which are measured for different positions of the coin.
  • the light channels 3, 4, 5 are placed in different heights over the ramp 2 and in different distance from the coil center.
  • the light channels should be placed so that no channels simultaneously hit the trailing edge of any passing coin.
  • the "rate" of attenuation change will be measured in addition to the maximum attenuation. This gives an indication of the stamp of the coin.
  • the largest and normally most valuable coins will break most of the light channels and thereby give relevant measurements.
  • the first measurement should preferably show the smallest attenuation.
  • the light channels should be arranged so that at least 1% (preferably between 1 - 20%) of the coin area is within the sensitive part of the coil when the first measurement is taken.
  • the block diagram of a coin identifier circuit is given in fig. 5 (In the following description the number of light channels is set to three).
  • the coin identifier includes a micro computer 10 having the following control lines:
  • the counter 11 counts the number of pulses seen on a line CP2 from a clock pulse generator 13. This is a direct binary measure of attenuation Ai.
  • Selection of light channels ELC1-3, RLC1-3 is made in a selector/decoder 14 by the micro computer 10 via the control lines LC1, LC2 and LC3, which are enabled when the counter 11 goes from its reset rest position.
  • the receiver part of the selector/decoder 14 sends the signal INT to the micro computer 10 for each position of the coin where the results are to be read from the port 12.
  • the signal INT is present the contents of the port 12 is latched.
  • the clock pulse generator 13 supplies the transmitting or emitting coil CE with an alternating voltage CP1 which is made sinusoidal by an RC-network RCE.
  • the generator also loads the counter 11 with clock pulses CP2 when not inhibited by a comparator 15.
  • the generator 13 is provided with a pulse stretching arrangement for the inhibiting signal INH from the comparator 15.
  • the contents of the counter 11 is transmitted to the micro-computer 10 via the port 12.
  • the signal INT goes “low”
  • the contents are latched.
  • With a "high” on the INT line the counter contents is transmitted directly to the data bus DB.
  • a digital/analog converter (D/A) 16 translates the binary contents of the counter 11 into an analog signal which is fed to the comparator 15.
  • the level of the received signals OUT-COIL from the received coil CR is compared with the output OUT-DA from the D/A converter 16, confer Fig. 6.
  • the comparator output INH becomes low. In rest position this will happen for every negative half wave of the OUT-COIL signal.
  • the pulse stretcher in the clock pulse generator 13 covers the period between half waves, and as long pulses arrive with short intervals (see Figure 6), the clock pulse CP2 to the counter 11 is inhibited.
  • the clock pulse signal CP2 is no longer inhibited and the counter 11 starts counting.
  • the contents of this counter is now converted into an analog signal via the D/A converter 16. Since the binary input of the D/A converter 16 increases, its output signal OUT-DA will increase too.
  • the signal OUT-DA will follow the attenuated amplitude of the received signal until the maximum attenuation is reached. Once this level has been reached by OUT-DA, the amplitude of the signal OUT-COIL starts increasing and the negative half wave of the signal will go below OUT-DA again. As a consequence the INH-line will start pulsing again, CP2 is inhibited and the counter stops in the position it reached and remains stable. The contents of the counter is a number indicating the maximum attenuation for the coin and OUT-DA remains stable at the maximum attenuation level. Also the information from the port 12 to the DB line remains stable at its highest value for the particular coin.
  • the INT signal disappears so that the port 12 is opened for new data and ELC2 is on.
  • the counter will continue to run as the coin passes the coil on its way to the maximum attenuation position.
  • RLC2 receives light
  • the contents of the port 12, which reads the accumulated number in the counter 11 will again be latched
  • a new INT signal causes the micro computer 10 to read the port 12, store the result as "RESULT SECOND ATTENUATION" A2 and change the high level signal from LC2 to LC3.
  • the high level signal on LC3 is removed, and the INT signal disappears so that the port 12 is again opened for new data.
  • the micro computer 10 waits for the maximum attenuation level for the particular coin by checking the contents of the counter 11 via the port 12 every 8 msec. When two successive measurements show that the counter contents remain unchanged (different from zero), the port contents is stored as "RESULT MAX. ATTENUATION" (Amax). After that the counter 11 is reset and a high level signal is put onto LC1, waiting for the next coin. The emitter ELC1 is, however, not lit before a new coin starts attenuating the coil signals.
  • Fig. 7 shows the attenuation as represented by the OUT-COIL signal occurring during the passage AM of the coin.
  • the clock pulses CP2 to the counter 11 are also indicated as well as the positions on the OUT-COIL envelope curve where the attenuation measurements A1, A2, A3 and Amax are taken.
  • the OUT-DA signal will go low as soon as the counter 11 is reset.
  • the maximum attenuation (Result Amax) has a correlation to the other measured attenuations, (Result A1, A2 and A3) determined by the geometry and stamp of the coin,the difference between the adjoining results will be represented by a much narrower Gauss distribution curve for a random sample, than the maximum result Amax would give alone.
  • the measured values may be combined in many ways. A high selectivity may be obtained by using two calculated values Amax-A3 and A3-A2 in addition to three of the initial measured results (A1, A2, and Amax).
  • the limits for the five results are then calculated (e.g. ⁇ 2d) and stored in an EPROM.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Telephone Function (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Soil Working Implements (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Cosmetics (AREA)
  • Television Signal Processing For Recording (AREA)
  • Noodles (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
EP86201826A 1985-11-27 1986-10-21 Method for identifying coins Expired - Lifetime EP0224946B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86201826T ATE99816T1 (de) 1985-11-27 1986-10-21 Verfahren zum identifizieren von muenzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK547985A DK158418C (da) 1985-11-27 1985-11-27 Fremgangsmaade til identificering af moenter og apparat til brug ved udoevelse af fremgangsmaaden
DK5479/85 1985-11-27

Publications (3)

Publication Number Publication Date
EP0224946A2 EP0224946A2 (en) 1987-06-10
EP0224946A3 EP0224946A3 (en) 1989-02-22
EP0224946B1 true EP0224946B1 (en) 1994-01-05

Family

ID=8142791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86201826A Expired - Lifetime EP0224946B1 (en) 1985-11-27 1986-10-21 Method for identifying coins

Country Status (10)

Country Link
EP (1) EP0224946B1 (enrdf_load_stackoverflow)
JP (1) JPS62131397A (enrdf_load_stackoverflow)
AT (1) ATE99816T1 (enrdf_load_stackoverflow)
AU (1) AU585092B2 (enrdf_load_stackoverflow)
DE (1) DE3689514T2 (enrdf_load_stackoverflow)
DK (1) DK158418C (enrdf_load_stackoverflow)
ES (1) ES2047475T3 (enrdf_load_stackoverflow)
FI (1) FI88968C (enrdf_load_stackoverflow)
NO (1) NO171936C (enrdf_load_stackoverflow)
NZ (1) NZ218263A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES1011067Y (es) * 1989-07-12 1992-04-01 Jofemar, S.A. Mejoras en la lectura de sensores magneticos en selectores de monedas.
DE69132520T3 (de) * 1991-03-27 2004-09-23 Nippon Conlux Co., Ltd. Vorrichtung und Verfahren zum Unterscheiden von Münzen
GB9221868D0 (en) * 1992-10-19 1992-12-02 Case Icc Limited Coin transporting apparatus

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739895A (en) * 1971-08-16 1973-06-19 G Fougere Method and apparatus for testing coins employing dimensional categorizing means
US3754558A (en) * 1972-03-13 1973-08-28 Abbott Coin Counter Coin processing apparatus with jam detection system
DE2213376A1 (de) * 1972-03-20 1973-09-27 Pruemm Geb Heuser Margot Elektronischer muenzpruefer
JPS4928476A (enrdf_load_stackoverflow) * 1972-07-14 1974-03-13
JPS51147394A (en) * 1975-06-12 1976-12-17 Anritsu Corp Coin sorter
JPS52117698A (en) * 1976-03-29 1977-10-03 Anritsu Electric Co Ltd Coin selecting device
FR2359468A2 (fr) * 1976-07-23 1978-02-17 Crouzet Sa Nouveau selecteur de pieces de monnaie pour distributeurs automatiques
FR2408183A1 (fr) * 1977-11-03 1979-06-01 Signaux Entr Electriques Controleur de pieces metalliques, et notamment de pieces de monnaie
JPS5517258U (enrdf_load_stackoverflow) * 1978-07-20 1980-02-02
AU553933B2 (en) * 1978-08-30 1986-07-31 Gec Plessey Telecommunications Limited Coin discriminating appaaratus
DE3172063D1 (en) * 1980-12-05 1985-10-03 Autelca Ag Circuitry for a coin tester
JPS57139885A (en) * 1981-02-24 1982-08-30 Omron Tateisi Electronics Co Coin selector
DE3267960D1 (en) * 1981-03-06 1986-01-30 Sodeco Compteurs De Geneve Coin testing apparatus
DE3175713D1 (en) * 1981-06-03 1987-01-22 Int Standard Electric Corp Article recognition system and processor controlled system
JPS5958595A (ja) * 1982-09-28 1984-04-04 富士電機株式会社 硬貨選別装置

Also Published As

Publication number Publication date
ES2047475T3 (es) 1994-03-01
JPH0529959B2 (enrdf_load_stackoverflow) 1993-05-06
NO171936B (no) 1993-02-08
DK547985A (da) 1987-05-28
AU6519686A (en) 1987-06-04
JPS62131397A (ja) 1987-06-13
FI864580L (fi) 1987-05-28
ATE99816T1 (de) 1994-01-15
NO171936C (no) 1993-05-19
NO864581D0 (no) 1986-11-18
DK158418B (da) 1990-05-14
DE3689514T2 (de) 1994-06-23
DK158418C (da) 1990-10-22
FI864580A0 (fi) 1986-11-11
EP0224946A2 (en) 1987-06-10
DK547985D0 (da) 1985-11-27
FI88968B (fi) 1993-04-15
FI88968C (fi) 1993-07-26
NZ218263A (en) 1989-03-29
DE3689514D1 (de) 1994-02-17
EP0224946A3 (en) 1989-02-22
AU585092B2 (en) 1989-06-08

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