EP1286313A2 - Verfahren und Vorrichtung zur Messung des Durchmessers von Münzen - Google Patents
Verfahren und Vorrichtung zur Messung des Durchmessers von Münzen Download PDFInfo
- Publication number
- EP1286313A2 EP1286313A2 EP02014680A EP02014680A EP1286313A2 EP 1286313 A2 EP1286313 A2 EP 1286313A2 EP 02014680 A EP02014680 A EP 02014680A EP 02014680 A EP02014680 A EP 02014680A EP 1286313 A2 EP1286313 A2 EP 1286313A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coin
- coins
- coil
- diameter
- values
- 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
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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
- G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation
-
- 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
Definitions
- the invention relates to a method for measuring the diameter of Coins according to claim 1.
- DE 197 26 449 describes a method for checking coins with an inductive one working sensor arrangement has become known, in which the primary coil of the coil arrangement is fed with a periodic transmission signal, the harmonic contains.
- the known method a number of Assigned switching steps.
- the values of the received signal are used for the respective switching steps repeating with the frequency of the transmission signal Envelopes formed.
- An evaluation device forms from the number at the same time generated envelopes at least one criterion to generate the assumption or Return signal.
- the envelopes are characteristic of the nature a coin and can be evaluated in a suitable manner. For example the ratio of the amplitudes of the envelopes is a characteristic measure.
- the invention has for its object a method for measuring the diameter of coins, in which a particularly precise determination is possible is.
- the coins pass through an electromagnetic one Field.
- the coil arrangement is designed such that at least the upper area of the coins regardless of their diameter the field at least partially covers.
- the Transmitter coil fed with a periodic transmission pulse which is in relation to the The lead time of the coins is short.
- the maximum damping values are determined. Whichever, too at what point in time a measurement was made from the start of the transmission pulse the frequency of the field changes. Then maximum values are obtained, as they arise in DE 197 26 449 from the envelopes described there.
- these attenuation values are measured extrapolated to the time zero and the measured values determined thereby are compared with specified acceptance bands for coin diameters. Is the If the determined value is not in an acceptance band, the coin is eliminated as a false certificate.
- the method according to the invention is based on the following knowledge.
- One by one Field running coin forms a shield.
- the extent of shielding is however dependent on the frequency of the field. Low frequencies are mainly dampened by the material, i.e. the field penetrates the material in Dependence on its conductivity. The higher the frequency of the field, the more it penetrates less into the material.
- the induced voltage on the receiver coil depends on the coverage by the coin, the higher the Frequency is.
- a so-called skin effect occurs, i.e. the field hardly ever penetrates the material of the coin.
- the shielding effect would only depend on the size, i.e. the diameter of the coin. Let infinitely high frequencies of course not being realized. With an infinitely steep edge of a pulse the frequency would be infinite, but technically this cannot be achieved. Rather, the transmission circuit needs a certain time to complete the magnetic Build field, about 1 ⁇ sec with commercially available components.
- the individual frequency-dependent ones Measuring points for the maxima of the damping to a curve or even connect a straight line.
- the shape of the curve depends on the proportionality the damping behavior on the one hand and the configuration of the coil arrangement on the other hand.
- a coil arrangement is conceivable in which a linear relationship between damping and diameter is obtained.
- Damping is a measure of the diameter. It has been found that the measurement method leads to a very favorable result with small deviations.
- Different methods can be used to extrapolate the measured values, for example the so-called curve fit, from the measured values measured in each case a measured value for the time zero and thus for the diameter of the run through To determine coin.
- the method can be carried out in the sense of DE 197 26 449, namely a subdivision of the transmission pulse into a number of time steps become.
- a single receiving or secondary coil can be provided and their output signals can at the respective frequency of the transmission signal formed into envelopes in the case of repeated switching steps. This requires however no pronounced formation of the envelopes, only the Determination of maximum values for the respective frequencies.
- the determined Maximum values are then in the manner already described on the Time zero extrapolated to determine the diameter value.
- the invention provides that rectangular coils are used for the transmitting and receiving coils, which are relatively short in the direction of the coins.
- the length is preferred the coins in the running direction are significantly shorter than the diameter of the smallest to be accepted Coin.
- the receiving coil is in height divided into at least an upper and a lower section, the upper Section is located so far above the coin path that it is from the coins is still partially covered with the smallest diameter, while the the lower section extends to the coin runway or just above it ends.
- the top section of the receiving coil can be used for diameter measurement be used, as already described above.
- the lower Section is used for material determination, the material determination being different Art can take place, but in particular also in the manner as in DE 197 26,449.
- the lower one Section of the receiving coil in two superposed subsections be divided, of which the lower section of the range of bicolor coins is covered, which lies outside the core of the bicolor coins.
- bicoloured are known to be those that have a core made of a first material and one around the A ring of another material arranged around the core.
- some euro coins are designed as bicolor coins.
- a coin track 10 of a coin validator is closed recognize on which a bicolor coin 12 rolls along.
- the coin moves through a coil arrangement consisting of a transmitter coil 14 and a receiver coil 16.
- the coil arrangements 14, 16 are rectangular and in the direction of the coin 12 shorter than their diameter.
- the receiving coil 16 is in three sections 18, 20 and 22 divided. The division is made in height. It is such that the Section 18 in any case from the top of the coin temporarily at least is partially covered, regardless of their diameter.
- the coin 12 consists of an inner core 24 and a ring 26 around the core 24 (Bicoloured).
- the upper section 18 is arranged to be normal is not covered by the core 24 when the coin is through the coil assembly passes.
- Section 20 is designed to be essentially the core area captured a bicolour coin.
- the lower section 22 essentially covers the lower region of the edge or ring 26.
- the measurement is primarily section 18 for a diameter determination used. Sections 20 and 22 serve to determine the material by a method as described in DE 197 26 449.
- the transmitter coil 14 is periodically acted upon by rectangular pulses Example have a duration of 30 ⁇ s. Since the passage of a coin through a Coil arrangement, as shown in Fig. 1, is about 200 ms, the duration of the transmission signal is small in relation to the throughput time of the coin. Such one Rectangular pulse is also recurrent in the process according to the mentioned DE 197 26 449 used. Is now the according to this document Send pulse divided into individual time periods or switching steps and becomes one Measurement of the signal of the receiving coil 18 at the individual time steps, For example, one of the curves shown in Fig. 2 is obtained. The curve with the highest maximum is one that has a maximum Damping corresponds. A maximum attenuation or shielding is at a received maximum frequency.
- this curve corresponds to the highest frequency, which is measured, i.e. for a switching step that is behind the start of the Transmission pulse. Will always be recurring during the coin run time measured during this time, the curve mentioned is also obtained the maximum maximum. Are the time steps further from the starting point or the Rising edge of the rectangular pulse, this results in a lower frequency and therefore less damping. In other words, with one and the same Coin material will have a different damping depending on the frequency received when passing the coin. The different frequency results in how mentioned, by the time of measurement relative to the rising edge of the rectangular pulse.
- the family of curves according to FIG. 2 is not with a bicolor coin can be reached, this leads to a different family of curves as in the already mentioned DE 197 26 449 is shown in this regard.
- the family of curves 2 refers to a coin that is homogeneous from one certain material is made.
- the curve shape 30 results in FIG. 5.
- the individual measurement points on the curve 30 correspond to different frequencies, which are therefore different Result in damping. If you take another material, surrender other curves, as shown in Fig. 5.
- the assignment of the curves to the materials result from the legend in Fig. 5 on the right.
- FIG. 4 shows the course of the curves according to FIG. 3 in the time frame from 0 to 1 ⁇ s. you recognizes that the damping range is the same for individual materials
- the diameter of a coin varies between 367 and 357.5. This is extraordinary small area that is sufficient, the diameter size is sufficiently precise to investigate.
- a non-linear extrapolation is carried out in FIG. 6, as is also per se is known, for example under the name curve fit. While following the curves 3 to 5 a diameter value of 30 mm is used, the family of curves lies 6 is based on a coin diameter of 18 mm.
- a characteristic curve of the diameter over the damping measured values is recorded in FIG. 7 for a non-linear extrapolation and correction of the family of curves Fig. 3 and 5. It can be seen that the measuring points of different materials approximately on a function approximating a straight line, so that by the procedure described can determine exactly whether a coin inserted a predetermined diameter range or not.
- the target diameter Individual coins of a coin set can be defined through a diameter window that needs to be very small, so that even coin sets with very small Differences in diameter can be discriminated exactly.
- the maximum mistake is at least theoretically 0.115 mm. This mistake is enough, including those Differentiate coins from each other, which differ in diameter only by 0.5 mm are.
- the method described can only be used with the receiving coil section 18 are carried out.
- the receiving coil sections 20 and 22 can be used for material determination in a way like this is described in DE 197 26 449.
- the envelopes are used 2, which are also generated in these sections, for material determination.
- Coins designed as bicolor coins can also be used the known method can be detected.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Coins (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
- Fig. 1
- zeigt einen schematischen Aufbau einer Vorrichtung zur Durchführung des Verfahrens nach der Erfindung.
- Fig. 2
- zeigt die Dämpfungskennlinien etwa für eine Anordnung nach Fig. 1 beim Durchlaufen von Münzen unterschiedlichen Materials.
- Fig. 3
- zeigt ein Kennlinienfeld von Maximalwerten der Dämpfung für verschiedene Münzmaterialien einschließlich ihrer Extrapolation zu 0.
- Fig. 4
- zeigt vergrößert einen Ausschnitt aus Fig. 4 mit der Extrapolation zu 0.
- Fig. 5
- zeigt ein ähnliches Kennlinienfeld wie Fig. 3, jedoch mit einer Korrektur der linearen Extrapolation.
- Fig. 6
- zeigt ein Kennlinienfeld ähnlich wie Fig. 3, jedoch bei nicht linearer Extrapolation.
- Fig. 7
- zeigt eine Kennlinie für verschiedene Durchmesser und Materialien bei nicht linearer Extrapolation und Korrektur.
Claims (5)
- Verfahren zur Messung des Durchmessers von Münzen in Münzprüfgeräten mit den folgenden Schritten:die Münzen durchlaufen ein elektromagnetisches Feld, das so ausgebildet ist, dass zumindest auch durch deren oberen Bereich das Feld teilweise abgedeckt wirddas Feld wird zwischen mindestens einer Sendespule und einer Empfangsspule erzeugtauf die Sendespule wird periodisch ein kurzer Sendeimpuls gegeben, dessen Dauer im Verhältnis zur Münzdurchlaufzeit klein istes werden für unterschiedliche Zeiten des Sendeimpulses die maximalen Dämpfungswerte ermitteltdie Dämpfungsmesswerte werden auf den Zeitpunkt 0 extrapoliertder durch Extrapolation ermittelte Messwert wird mit einem vorgegebenen Annahmeband bzw. einer vorgegebenen Kennlinie für Münzdurchmesser zwecks Vergleich mit einem gespeicherten Sollwert verglichen.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass einem periodisch wiederkehrenden Abschnitt des Sendeimpulses eine Anzahl von Schaltschritten zugeordnet ist, aus den Werten des Empfangssignals der Empfangsspule bei den jeweiligen sich mit der Frequenz des Sendeimpulses wiederholenden Schaltschritten Hüllkurven gebildet werden und eine Auswertevorrichtung aus der Anzahl der zeitgleich erzeugten Hüllkurven die jeweiligen Maxima bestimmt.
- Spulenanordnung zur Durchführung des Verfahrens nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Rechteckspulen (12, 14) als Sende- und Empfangsspule verwendet werden, die in Laufrichtung der Münzen kurz sind, vorzugsweise kürzer als der Durchmesser der kleinsten anzunehmenden Münze.
- Spulenanordnung nach Anspruch 3, dadurch gekennzeichnet, dass die Empfangsspule (16) in der Höhe in einen oberen und einen unteren Abschnitt unterteilt ist, wobei der obere Abschnitt (18) so weit oberhalb der Münzlaufbahn (10) angeordnet ist, dass er von der Münze mit dem kleinsten Durchmesser nur teilweise abgedeckt ist, während der untere Abschnitt (20, 22) bis an die Münzlaufbahn (10) reicht oder kurz oberhalb von dieser endet.
- Spulenanordnung nach Anspruch 4, dadurch gekennzeichnet, dass der untere Abschnitt in zwei übereinander angeordnete Unterabschnitte (20, 22) unterteilt ist, von denen der untere Unterabschnitt (22) den Bereich von Bicolormünzen abdeckt, der außerhalb des Kerns der Bicolormünzen liegt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10140225A DE10140225C2 (de) | 2001-08-16 | 2001-08-16 | Verfahren und Vorrichtung zur Messung des Durchmessers von Münzen |
DE10140225 | 2001-08-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1286313A2 true EP1286313A2 (de) | 2003-02-26 |
EP1286313A3 EP1286313A3 (de) | 2004-05-06 |
EP1286313B1 EP1286313B1 (de) | 2008-03-19 |
Family
ID=7695646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02014680A Expired - Lifetime EP1286313B1 (de) | 2001-08-16 | 2002-07-03 | Verfahren und Vorrichtung zur Messung des Durchmessers von Münzen |
Country Status (4)
Country | Link |
---|---|
US (1) | US7104384B2 (de) |
EP (1) | EP1286313B1 (de) |
DE (2) | DE10140225C2 (de) |
ES (1) | ES2299541T3 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20216785U1 (de) * | 2002-10-31 | 2003-01-09 | National Rejectors, Inc. Gmbh, 21614 Buxtehude | Spulenanordnung für Münzprüfer |
DE102004020159A1 (de) * | 2004-04-24 | 2005-11-17 | National Rejectors, Inc. Gmbh | Verfahren zum Prüfen von Münzen |
DE102007046390B3 (de) * | 2007-09-20 | 2008-11-27 | National Rejectors, Inc. Gmbh | Verfahren zum Prüfen von Münzen |
JP5608898B2 (ja) * | 2010-07-09 | 2014-10-22 | 旭精工株式会社 | コイン識別装置 |
JP6425878B2 (ja) * | 2013-10-18 | 2018-11-21 | 株式会社日本コンラックス | 硬貨処理装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0336018A2 (de) * | 1988-03-31 | 1989-10-11 | Nippon Conlux Co., Ltd. | Vorrichtung und Verfahren zum Sortieren von Münzen |
EP0862147A2 (de) * | 1997-01-28 | 1998-09-02 | National Rejectors Inc. GmbH | Münzprüfvorrichtung |
EP0886247A2 (de) * | 1997-06-21 | 1998-12-23 | National Rejectors Inc. GmbH | Verfahren und Schaltungsanordnung zur Prüfung von Münzen |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8303587D0 (en) * | 1983-02-09 | 1983-03-16 | Chapman Cash Processing Ltd | Coin discriminating apparatus |
US4705154A (en) * | 1985-05-17 | 1987-11-10 | Matsushita Electric Industrial Co. Ltd. | Coin selection apparatus |
GB8717494D0 (en) * | 1987-07-23 | 1987-08-26 | Scan Coin Ab | Coin discriminator |
US4998610A (en) * | 1988-09-19 | 1991-03-12 | Said Adil S | Coin detector and counter |
US6520308B1 (en) * | 1996-06-28 | 2003-02-18 | Coinstar, Inc. | Coin discrimination apparatus and method |
GB2323199B (en) * | 1997-02-24 | 2000-12-20 | Mars Inc | Method and apparatus for validating coins |
-
2001
- 2001-08-16 DE DE10140225A patent/DE10140225C2/de not_active Expired - Fee Related
-
2002
- 2002-07-03 DE DE50211909T patent/DE50211909D1/de not_active Expired - Lifetime
- 2002-07-03 ES ES02014680T patent/ES2299541T3/es not_active Expired - Lifetime
- 2002-07-03 EP EP02014680A patent/EP1286313B1/de not_active Expired - Lifetime
- 2002-07-31 US US10/210,123 patent/US7104384B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0336018A2 (de) * | 1988-03-31 | 1989-10-11 | Nippon Conlux Co., Ltd. | Vorrichtung und Verfahren zum Sortieren von Münzen |
EP0862147A2 (de) * | 1997-01-28 | 1998-09-02 | National Rejectors Inc. GmbH | Münzprüfvorrichtung |
EP0886247A2 (de) * | 1997-06-21 | 1998-12-23 | National Rejectors Inc. GmbH | Verfahren und Schaltungsanordnung zur Prüfung von Münzen |
Also Published As
Publication number | Publication date |
---|---|
DE10140225A1 (de) | 2003-03-06 |
DE50211909D1 (de) | 2008-04-30 |
EP1286313B1 (de) | 2008-03-19 |
US20030034223A1 (en) | 2003-02-20 |
ES2299541T3 (es) | 2008-06-01 |
US7104384B2 (en) | 2006-09-12 |
DE10140225C2 (de) | 2003-08-07 |
EP1286313A3 (de) | 2004-05-06 |
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