WO1992002905A1 - Dispositivo y procedimiento para la obtencion de caracteristicas mecanicas de monedas - Google Patents
Dispositivo y procedimiento para la obtencion de caracteristicas mecanicas de monedas Download PDFInfo
- Publication number
- WO1992002905A1 WO1992002905A1 PCT/ES1991/000051 ES9100051W WO9202905A1 WO 1992002905 A1 WO1992002905 A1 WO 1992002905A1 ES 9100051 W ES9100051 W ES 9100051W WO 9202905 A1 WO9202905 A1 WO 9202905A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coins
- coin
- section
- impact
- upper section
- Prior art date
Links
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
- G07D5/04—Testing the weight
Definitions
- the present invention relates to a device for obtaining mechanical characteristics of coins, applicable in coin selectors or verifiers used in machines that operate by introducing one or more coins.
- the electronic selectors are known, which by means of electro-optical, inductive and, to a lesser extent, capacitive sensors allow fundamentally electromagnetic and dimensional characteristics to be obtained.
- electrical signals can be obtained that keep laughing, for example, with the diameter of the coins, thickness, electrical conductivity, magnetic permeability, etc.
- the electrical signals obtained are then compared with predetermined values for the identification of the coins and their consequent acceptance or rejection.
- Swiss patent 624,500 refers to a coin verification device for automatic machines, based on the measurement of coin weight by means of a weighing device or electronic scale.
- British Patent 2,015,559 refers to an apparatus for detecting the value of a coin, which includes in combination with detecting means of the dimensions of the coins, a weight sensor consisting of a movable plate, which is associated with a phototransistor that de_ Tect the position of said plate. To determine the weight of the coin, it is necessary to stop the coin.
- French patent 2335005 refers to a positive coin-controlling device, which includes a mechanical weighing device, in the form of a Roman scale, which checks whether the coin has a minimum weight.
- the device object of the present invention corresponds to the type of sensors mentioned above, which are based on the measurement of the weight of the coins.
- the device of the invention effects the weight of the coins by detecting the deformations suffered by an elastically deformable element, on which the coins run.
- the weight of the days is effected by detecting the displacement of a mobile element, on which the coins dicurize.
- the device of the invention there is no moving element, but an elastically deformable element.
- the weight sensor used is different.
- the detector of the invention does not need to stop the coin in order to weigh it. That is to say that in front of a static measurement, the device of the invention makes a dynamic measurement.
- the element by which the weighing of the coins is carried out is of a different constitution.
- the device of the invention uses a weighing element different from that of the French patent 2,335,005, which, on the other hand, only checks whether the coin has a minimum weight, that is, it detects the possible lack of weight, but not the currency's own weight. Nor does it provide electrical signals for later checking and comparison.
- the present invention develops a device for obtaining mechanical characteristics of coins, applicable to coin selectors, which allows the identification of coins based on the detection of the deformations that an elastically deformable element undergoes, preferably of a metallic nature , on which the coin rolls, depending on the deformations of the mentioned element of the weight of the coin and the position of the coin at any time with respect to the deformable element.
- any of the direct or indirect procedures applicable in the measurement of deformations in materials can be used.
- the elastically deformable element is composed of a recessed rod at least one of its ends.
- This beam defines a rolling path along which the coin causing the deformation of the beam will move in a magnitude that will depend on the weight of the coin and its position with respect to the embedding point of the ga.
- the beam will be associated with a strain gauge.
- This device will be part of a coin selector and the elastically deformable element will define a section of the path that the coins will describe through the selector.
- the aforementioned beam may be constituted by an elastic strip that is embedded at one end and runs cantilever.
- the deformation meter may consist of a strain gauge attached to the metal strip, near its embedment. This meter can also consist of a movement sensor that measures the arrow of the point of maximum deformation of the beam.
- the strip that defines the elastically formable element can be supported by its free end.
- the beam or elastic strip can be embedded in both ends.
- the beam defining the elastically deformable element may include an upper section, which will define the raceway for the coins, and an inferior section, which will serve as an anchor zone to the selector body or housing. At least the first section cited will run with a certain inclination, to cause the coins to roll.
- the subject of the invention is also a process for obtaining mechanical characteristics of coins, by using the device described.
- the signal obtained by the impact and rolling of a coin on the elastically deformable element object of the invention includes two fields clearly differentiable by the different excitation originated in both (frequency fields).
- One of these fields corresponds to the moment of the impact of the currency on the elastically deformable element, and the other to the variable signal that occurs during the rolling of the coin along said element and that depends on the weight of the coin and its position along the elastically ⁇ eformable element.
- the process of the invention is based on the use of the impact of the coin on the elastic deformable element to determine, by means of a specific frequency analysis, a representative parameter of the mechanical elasticity of the coin. For this, a measurement of the upper harmonics of the impact signal is made, the content of said measurement being representative of the mechanical elasticity of the coin.
- the method of the invention therefore uses frequency analysis techniques, in order to analyze the proper resonance frequencies, depending on the type of impact. If the currency is of high elasticity, the high frequencies tend to be more excited than if the currency is of low elasticity, in this case the currency acting as a buffer. Therefore, by analyzing the harmonic content of the signal produced by the impact, a representative measure of the elasticity of the currency can be obtained.
- the frequency analysis of the described impact can be carried out by means of a circuit that includes an amplifier, in charge of increasing the level of the signal delivered by the impact sensor, an analogue pass-band filter circuit, whose tuning is centered on the characteristic frequency of the elasticity sought. a digital analog converter and a microprocessor pa. ra your treatment.
- the analog filter can be of fixed or variable band-pass frequency depending on whether one or more frequency ranges to be discriminated.
- a digital filter can be used, implemented on the microprocessor used in the coin selector.
- Figure 1 shows schematically a device for obtaining mechanical characteristics of coins, consisting of a beam embedded by an end.
- Figure 2 represents a diagram of the strength of the coin on the beam subjected to bending.
- Figure 3 corresponds to a possible circuit that allows to obtain tensions proportional to the deformation of the elastically deformable element.
- Figure 4 is a diagram of the electrical signal resulting from deformations of the elastically deformable element during the rolling of a coin.
- Figure 5 shows in perspective a possible embodiment of the deformable elastic element.
- Figure 6 a lower floor of the element of Figure 5.
- Figure 7 shows in front elevation the internal part of a coin selector that includes the elastically deformable element of Figures 5 and 6.
- Figure 8 shows in perspective the embodiment of Figure 7.
- Figures 9 and 10 show, in side elevation, as many embodiments of the elastically deformable element.
- Figures 11 and 12 correspond to many other graphs, where the frequency content of the impact of two currencies of equal dimensions but of different elasticity is represented, the graph of Figure 11 corresponding to a legal tender and that of the currency Fig. 12 to its corresponding lead fraud.
- Figure 13 is a block diagram of a circuit that allows carrying out the process of the invention.
- the arrows referenced with the number 1 indicate the path followed by the coin, for example within a coin selector.
- a section of this path is defined by the device of the invention, which comprises an elastically deformable beam 2 that is recessed at its end 3 and runs in a cantilever.
- This beam may consist of a metal sheet on which coins 4 will roll.
- strain gauges 7 can be used along with the embedment of the beam, without this technique excluding other possible procedures or systems for measuring sheet deformations.
- the measurement of deformations can be carried out by means of displacement sensors (without contact) in its multiple variants (inductive, capacitive, etc.).
- the gauge can be configured using auxiliary resistors or more gauges, in a heastone bridge assembly (medium or full).
- an electrical voltage will be obtained at the circuit's output, depending on the deformation experienced by the recessed sheet, as illustrated in Figure 3.
- the mass of the coins can be determined by obtaining the main component of the resulting electrical signal. This signal will increase pau latinly until the oneda overflows the end of sheet 2, at which point it will return to the value before the coin passes.
- Figure 4 represents the electrical voltage obtained at the passage of the coin, the moments dg and d corresponding to those of the beginning and end of the coin coin on sheet 2.
- the mass of the coin can also be determined by making a frequency analysis of the electrical signal obtained since, in addition to the main component, proportionate to the weight of the coin, the frequency typical of the sheet-coin set will be present. These frequencies will be different depending on the currencies introduced.
- the sheet 2 can be supported by its free end and even embedded by both ends, achieving maximum flexion when the coin is in the middle of the sheet.
- the sheet 2 admits the adhesion of damping materials to the object of filtering, already from the sensor, components of the electrical signal obtained, of a frequency higher than the fundamental one and whose use is not pursued.
- a damping anvil can be arranged in front of said sheet that serves to de-energize the coin.
- the metal beam or strip will preferably be of a metallic nature, although it could also be made of non-metallic materials, for example based on compounds having damping effects.
- the beam represented in figures 5 and 6, comprises an upper section, generally referenced with the number 10, which will define the rolling path for the coins, and a lower section 11, which will serve as a zone or part anchoring the beam to the body or housing of the selector.
- the upper section 1 adopts a flat C-shaped configuration, the end branches 12 and 13 being of different length.
- the extreme branch 13 extends, from its free transverse edge, in a first portion 14, which is bent over the branch 13 at 180 °, and in a second portion bent outwards, at an angle slightly greater than 90 ° , which defines the lower section 11.
- This portion has a series of holes 15 for the passage of rivets or anchoring elements from the beam to the selector body.
- the extreme branches 12 and 13 run with a certain inclination, downwards towards the central branch.
- the central branch of the beam will have the sensor or strain gauge attached 16 below.
- Figure 7 shows the trajectory of a coin 4 introduced in the selector.
- an anvil-18 In front of beam 10 an anvil-18 is placed on which the coin will fall and which will serve as a damping element of impact vibrations.
- the sensor 16 associated with the beam 10 will detect only the deformations caused by the beam due to the rolling or displacement of the coin 17 along it.
- the selector body has a bottom stop 19 and a top stop 20 that limit the possible oscillations or movements of the beam 10.
- the remaining components shown in figures 7 and 8 they correspond to those of a traditional coach.
- the upper section of the beam is referred to with the number 10a and the lower section with the number lia.
- These two sections are straight and convergent to each other and are joined by an inter-intermediate section 21 that is an extension and is part of sections 10a and lia, being perpendicular to the second one.
- the section 10a will run, as in the case of Figures 1 to 6, in an inclined position to facilitate the rolling of the coins 17.
- the sensor 16 is attached to the outer surface of the intermediate section 21.
- the beam assembly shown in Figure 7 adopts a general C shape. None of the ends of section 10a, which constitutes the raceway, is embedded. Embedding is defined by the base of the C or lower branch lia.
- a beam configuration is shown in approximately T shape.
- the upper section 10b and the lower section 11b are straight and convergent as in the case of Figure 7 and are joined together by a intermediate section 21b, which is part of the lower section 11b and is independent of the upper section 10b that determines the raceway for the coins 17.
- the intermediate section 21b affects an intermediate point of the upper section 10b, to which it joins.
- FIG. 4 corresponds to the diagram of the electrical signal that results from the deformations of the elastically deformable element, represented in Figure 1, configured as a beam 2 embedded at one end, during the impact and rolling of a coin 4 thereon.
- the electrical tension obtained is represented in this diagram, where the references tg and t ⁇ correspond to the moments of beginning and end of the rolling of the coin on the beam that constitutes the elastic deformable element.
- the invention uses the first signals traded, which in the graph of Figure 4 correspond to those observed around the instant tg.
- the frequency analysis techniques analyze the frequencies own resonance depending on the type of impact, eye having a representative parameter of the mechanical elasticity of the coin. For this, as indicated, a measurement of the upper harmonics of the impact signal is made, the content of said measurement being representative of the mechanical elasticity of the coin.
- Figure 13 corresponds to a block diagram of a circuit applicable to the frequency analysis of impact described above.
- a digital analog converter 24 is arranged, which will send the digital signal to a microprocessor 26 for processing.
- the filter 23 can be of a fixed or variable pass-band frequency, depending on whether one or more frequency ranges to be discriminated.
- Memory 26 is related to the microprocessor, where the parameters corresponding to the different legal currencies will be stored, which will help to identify them.
- analog filter 23 digital filtering implemented on the microprocessor used in the coin selector can be used.
- Reference 28 indicates the admission / rejection and control of signals.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91914715A EP0500836B1 (en) | 1990-08-08 | 1991-08-06 | Device and method for obtaining mechanical characteristics of coins |
DE69115246T DE69115246T2 (de) | 1990-08-08 | 1991-08-06 | Vorrichtung und verfahren zum erlangen der mechanische eigenschaften von münzen. |
US07/839,762 US5316118A (en) | 1990-08-08 | 1991-08-06 | Device for obtaining mechanical characteristic of coins |
AU83953/91A AU653547B2 (en) | 1990-08-08 | 1991-08-06 | Device and method for obtaining mechanical characteristics of coins |
DK47092A DK47092D0 (da) | 1990-08-08 | 1992-04-07 | Apparat og fremgangsmaade til bestemmelse af mekaniske egenskaber ved moenter |
NO921352A NO305378B1 (no) | 1990-08-08 | 1992-04-07 | Anordning for Õ tilveiebringe mekaniske kjennetegn for mynter |
FI921542A FI102019B (fi) | 1990-08-08 | 1992-04-08 | Laite ja menetelmä kolikoiden mekaanisten ominaisuuksien toteamiseksi |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9002145 | 1990-08-08 | ||
ES9002145A ES2025479A6 (es) | 1990-08-08 | 1990-08-08 | Dispositivo para la obtencion de caracteristicas mecanicas de monedas. |
ES9101789A ES2036462B1 (es) | 1991-07-30 | 1991-07-30 | Procedimiento para la identificacion de monedas. |
ES9101787A ES2031793A6 (es) | 1991-07-30 | 1991-07-30 | Mejoras en el objeto de la patente n[ 9002145, presentada el 8 de agosto de 1990, relativa a un "dispositivo para la obtencion de caracteristicas mecanicas de monedas. |
ES9101787 | 1991-07-30 | ||
ES9101789 | 1991-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992002905A1 true WO1992002905A1 (es) | 1992-02-20 |
Family
ID=27240449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES1991/000051 WO1992002905A1 (es) | 1990-08-08 | 1991-08-06 | Dispositivo y procedimiento para la obtencion de caracteristicas mecanicas de monedas |
Country Status (11)
Country | Link |
---|---|
US (1) | US5316118A (es) |
EP (1) | EP0500836B1 (es) |
JP (1) | JPH05502961A (es) |
AT (1) | ATE131300T1 (es) |
AU (1) | AU653547B2 (es) |
DE (1) | DE69115246T2 (es) |
FI (1) | FI102019B (es) |
HU (2) | HU216202B (es) |
NO (1) | NO305378B1 (es) |
PT (1) | PT98597B (es) |
WO (1) | WO1992002905A1 (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0562998A2 (en) * | 1992-03-24 | 1993-09-29 | Azkoyen Industrial, S.A. | Device for obtaining the mechanical characteristics of coins |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2278946A (en) * | 1993-03-18 | 1994-12-14 | Comercial Cocamatic S A | Electronic coin selectors |
US5494145A (en) * | 1994-04-12 | 1996-02-27 | National Rejectors Inc. Gmbh | Coin validator for testing the mass of a coin |
ES1030459Y (es) * | 1995-03-22 | 1996-06-01 | Tremoya S L | Selector de monedas perfeccionado. |
ES1032118Y (es) * | 1995-09-22 | 1997-01-16 | Tremoya S L | Perfeccionamientos en los selectores de monedas. |
ES2160066B2 (es) * | 1999-08-18 | 2002-07-16 | Jofemar Sa | Selector de monedas mejorado. |
JP2011021947A (ja) * | 2009-07-14 | 2011-02-03 | Toshiba Corp | 重量検知装置 |
US20180268172A1 (en) * | 2017-03-14 | 2018-09-20 | Massachusetts Institute Of Technology | Electronic device authentication system |
US11423727B2 (en) * | 2020-10-23 | 2022-08-23 | Farshod Kayyod | Coin pinger device for alloy authentication |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR747958A (fr) * | 1932-11-17 | 1933-06-27 | Elektrozeit Ag | Sélecteur de monnaie à rigole inclinée |
WO1983000400A1 (en) * | 1981-07-23 | 1983-02-03 | Meyer, Peter | A procedure for classification of coins according to their mechanical elasticity |
EP0184393A2 (en) * | 1984-12-05 | 1986-06-11 | Mars Incorporated | Coin checking apparatus |
EP0323396A1 (de) * | 1987-12-31 | 1989-07-05 | Automaten Ag | Verfahren zur elektronischen Münzprüfung und Münzprüfer zur Durchführung des Verfahrens |
EP0360506A2 (en) * | 1988-09-20 | 1990-03-28 | Gpt Limited | Coin validation apparatus |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3878711A (en) * | 1973-09-24 | 1975-04-22 | Jr George J J Randolph | Extensometer |
DE2825094A1 (de) * | 1978-06-08 | 1979-12-13 | Nat Rejectors Gmbh | Verfahren und vorrichtung zur raendelpruefung von muenzen |
US5085309A (en) * | 1989-06-07 | 1992-02-04 | Adamson Phil A | Electronic coin detector |
-
1991
- 1991-08-06 JP JP3514209A patent/JPH05502961A/ja active Pending
- 1991-08-06 AU AU83953/91A patent/AU653547B2/en not_active Ceased
- 1991-08-06 US US07/839,762 patent/US5316118A/en not_active Expired - Fee Related
- 1991-08-06 AT AT91914715T patent/ATE131300T1/de not_active IP Right Cessation
- 1991-08-06 DE DE69115246T patent/DE69115246T2/de not_active Expired - Fee Related
- 1991-08-06 HU HU9201165A patent/HU216202B/hu not_active IP Right Cessation
- 1991-08-06 EP EP91914715A patent/EP0500836B1/en not_active Expired - Lifetime
- 1991-08-06 WO PCT/ES1991/000051 patent/WO1992002905A1/es active IP Right Grant
- 1991-08-07 PT PT98597A patent/PT98597B/pt active IP Right Grant
-
1992
- 1992-04-07 NO NO921352A patent/NO305378B1/no not_active IP Right Cessation
- 1992-04-07 HU HU929201165A patent/HU9201165D0/hu unknown
- 1992-04-08 FI FI921542A patent/FI102019B/fi active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR747958A (fr) * | 1932-11-17 | 1933-06-27 | Elektrozeit Ag | Sélecteur de monnaie à rigole inclinée |
WO1983000400A1 (en) * | 1981-07-23 | 1983-02-03 | Meyer, Peter | A procedure for classification of coins according to their mechanical elasticity |
EP0184393A2 (en) * | 1984-12-05 | 1986-06-11 | Mars Incorporated | Coin checking apparatus |
EP0323396A1 (de) * | 1987-12-31 | 1989-07-05 | Automaten Ag | Verfahren zur elektronischen Münzprüfung und Münzprüfer zur Durchführung des Verfahrens |
EP0360506A2 (en) * | 1988-09-20 | 1990-03-28 | Gpt Limited | Coin validation apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0562998A2 (en) * | 1992-03-24 | 1993-09-29 | Azkoyen Industrial, S.A. | Device for obtaining the mechanical characteristics of coins |
EP0562998A3 (en) * | 1992-03-24 | 1998-03-11 | Azkoyen Industrial, S.A. | Device for obtaining the mechanical characteristics of coins |
Also Published As
Publication number | Publication date |
---|---|
HUT60554A (en) | 1992-09-28 |
FI921542A (fi) | 1992-04-08 |
FI102019B1 (fi) | 1998-09-30 |
EP0500836A1 (en) | 1992-09-02 |
HU216202B (hu) | 1999-05-28 |
PT98597B (pt) | 1999-01-29 |
DE69115246D1 (de) | 1996-01-18 |
FI921542A0 (fi) | 1992-04-08 |
NO305378B1 (no) | 1999-05-18 |
PT98597A (pt) | 1993-08-31 |
AU8395391A (en) | 1992-03-02 |
JPH05502961A (ja) | 1993-05-20 |
DE69115246T2 (de) | 1996-07-18 |
NO921352D0 (no) | 1992-04-07 |
FI102019B (fi) | 1998-09-30 |
NO921352L (no) | 1992-04-07 |
ATE131300T1 (de) | 1995-12-15 |
US5316118A (en) | 1994-05-31 |
HU9201165D0 (en) | 1992-07-28 |
AU653547B2 (en) | 1994-10-06 |
EP0500836B1 (en) | 1995-12-06 |
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