EP0470439A1 - Appareil accepteur de pièces de monnaie - Google Patents

Appareil accepteur de pièces de monnaie Download PDF

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Publication number
EP0470439A1
EP0470439A1 EP91112401A EP91112401A EP0470439A1 EP 0470439 A1 EP0470439 A1 EP 0470439A1 EP 91112401 A EP91112401 A EP 91112401A EP 91112401 A EP91112401 A EP 91112401A EP 0470439 A1 EP0470439 A1 EP 0470439A1
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EP
European Patent Office
Prior art keywords
coin
value
stored
values
sensor
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
EP91112401A
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German (de)
English (en)
Other versions
EP0470439B1 (fr
Inventor
Klaus Dipl.-Ing. Meyer-Steffens (Fh)
Heinz Rehfinger
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.)
Crane Payment Innovations GmbH
Original Assignee
National Rejectors Inc GmbH
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Publication date
Application filed by National Rejectors Inc GmbH filed Critical National Rejectors Inc GmbH
Publication of EP0470439A1 publication Critical patent/EP0470439A1/fr
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Publication of EP0470439B1 publication Critical patent/EP0470439B1/fr
Anticipated expiration legal-status Critical
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    • 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

Definitions

  • the invention relates to an electronic coin validator according to the preamble of claim 1.
  • Electronic coin validators mostly use optical or electromagnetic sensors to determine the size, a specific material content or other criteria of an authenticity test that determine the authenticity of a coin.
  • the advantages of electronic coin validators include that coins of different values can pass through the same measuring section. Electronic coin validators can therefore be made very small, even if they are designed to accept a larger number of coin values at the same time.
  • the sensors usually generate analog output signals which are converted into digital signals with the aid of an A / D converter so that they are accessible for digital processing.
  • Electronic coin validators usually work with a microprocessor.
  • the microprocessor contains, for example, a comparison device which compares a digital test signal generated by the sensor with a reference signal stored in a programmable memory area, an authenticity signal being generated if the test signal and reference signal have a predetermined relationship to one another. For reasons of better differentiation, not a single reference value is specified, but two different reference values that define a reference band or a reference window. If the test signal falls into the reference window, an authenticity signal can be generated.
  • the electronic coin validator is normally designed to accept multiple coin values.
  • several sensors are often used, which examine the coins to be checked for different criteria in order to make the authenticity check more precise. It is therefore customary to first store all the test signals generated during the passage of a coin in a memory area, which can be part of the microprocessor, before the described evaluation is carried out. If there is more than one coin value, the microprocessor does not "know" which coin value has generated the test signals. It is therefore necessary to compare the test signals with all reference values or reference windows for all coin values in order to carry out an authenticity check. It goes without saying that this test process can be terminated if a real coin is detected in this way before the test cycle has ended (optimization).
  • the sensors used in a coin validator are mostly electromagnetic, and the signal generated by a passing coin has a typical curve, usually in the manner of a bell curve. It goes without saying that such measurement curves can be evaluated differently. For example, the peak values of the individual measurement curves can be determined, the area of the measurement curves, an average measurement value, etc. Furthermore, the intersection of two measurement curves can be determined, an addition of two intersection points can be made, an addition of intersection point and peak value or any other combination to be created. In conventional coin validators for more than two coin values, a fixed combination of measured values is set, which can also be referred to as measuring mode. Such a measuring mode is used, for example, for a coin validator to be used for German coins, i.e.
  • the invention is therefore based on the object of providing a coin validator for the testing of two or more coins of different values, which enables an individual test for each coin value with the shortest possible test time.
  • a separate measuring mode can be provided for each coin value.
  • the number of potentially measurable variables is therefore greater than the number of sensors.
  • the peak value and the mean value can be formed from the test signal of a sensor.
  • curve intersections and combinations of the values mentioned can be used.
  • These measured variables are stored in the first memory area at predetermined addresses.
  • individual coin value sensor combinations are assigned to the addresses.
  • all the measurands in question are first saved.
  • not all of the measured variables are relevant for the respective coin for the separation of counterfeit money.
  • four to six measured values are sufficient for real money counterfeit money evaluation.
  • Which measured quantities are processed for which coins results from the aforementioned assignment in the third memory area. This assignment is made during the manufacture of the coin validator. For example, experiments can find out for which coin values which measured values deliver the clearest differentiation criteria.
  • the reference values are also stored in accordance with the aforementioned assignment of the measured variables to the coin value sensor combination. If an evaluation is to be carried out after a coin has been inserted and the measured variables have been stored, the lowest coin value, for example the 5-pfennig coin, will be used. Because of the assignment made in the third memory area, this coin corresponds to a specific measurement variable to be selected for the first sensor. This was stored in a specific address in the memory. It can now be compared with the assigned reference value. If there is a match with the reference value (authenticity criterion), a flag is set. If there is a match, a corresponding comparison is repeated for the assigned measured variable of the second sensor and so on. This procedure is carried out for all coin values until it has been determined which coin it is. If a counterfeit coin has been inserted, the test routine described continues to the end.
  • Sensors for measuring physical quantities of a coin are subject to a so-called drift over a temperature range. This drift results from the temperature behavior of the electronic and mechanical components. So that there are no incorrect measurements or incorrect assessments, it is known to carry out temperature compensation, for example, by arranging a temperature-dependent element in the circuits for the individual sensors, which element changes the behavior of the sensor as a function of the temperature. In addition to the considerable structural effort, there is the disadvantage that an appropriate calibration may be required in production.
  • the temperature behavior of a sensor depends not only on its own nature, but also on the nature of the coin to be tested (size, material, material distribution in the coin, etc.). Depending on whether the coin is an iron disk, a copper-nickel disk, a copper disk or the like, the drift is different at different temperatures. Compensation of a sensor with the aid of the sensor circuit cannot take such a phenomenon into account.
  • the invention is therefore also based on the object of providing an electronic coin validator for checking two or more coins of different values with a test device containing at least one sensor, in which coin-dependent temperature compensation can be carried out in a simple manner.
  • the electronic coin validator according to the invention requires a single temperature sensor which can be provided for the other components independently of the electronic circuits. It only serves to generate a signal which is dependent on the ambient temperature and is preferably digitized via an A / D converter.
  • the same A / D converter can be used that is normally used for digitizing the output signals of the sensors.
  • the coin validator according to the invention provides a programmable fourth memory area in which a series of compensation curves is stored for individual sensor-coin value combinations, each curve consisting of a series of compensation values. In theory, it is conceivable to save the complete compensation curve. For practical applications, it is sufficient to store individual compensation values that correspond to certain temperatures or certain temperature ranges.
  • the respective compensation value series are then stored in the respective coin validators during production, for example via an external programming device (PC).
  • PC external programming device
  • a compensation curve could be required for each coin-value sensor combination.
  • some curves are the same for certain combinations, so that the same curve can be used for several comparison processes. For some combinations, no compensation required at all.
  • the coin validator according to the invention also contains a selection device which selects the corresponding compensation value for a temperature measured by the temperature sensor and a predetermined sensor-coin value combination from the associated compensation value series. If the sensor inputs a test signal in digitized form into the microprocessor, it can use the determined compensation value to modify the test signal before it is compared with the specified reference value. It goes without saying that the reference signal can also be modified with the compensation value instead of the test signal.
  • the microprocessor Since the coin validator does not "know" which coin value has been inserted in the case of several coin values to be accepted, the microprocessor must compare the test signal with all reference values of the sensors and coin values one after the other in the manner already described. For each comparison process, the test signal or the reference signal must therefore be modified again, the compensation value being able to be different, but not necessarily so.
  • the electronic coin validator according to the invention has a number of advantages. On the one hand, it enables individual temperature compensation for any coin value sensor combination. This also allows a finer measurement to be made, for example because the width of a reference window can be made smaller.
  • Another advantage of the invention is that a structural effort for temperature compensation is not necessary.
  • the setting of the electronic coin validator in the production for compensation purposes is extremely simple. With the help of a programming unit to be used anyway, the necessary values can be stored, the temperature behavior of the coin validator for the different coins to be accepted being determined beforehand by laboratory measurements.
  • a coin acceptor must accept different coins. This can be taken into account by programming the reference values accordingly.
  • compensation values can also be stored in the relevant memory areas for coin values that should not be accepted in the respective application. For example, it is possible to store the compensation value series for a number of countries with different coins and to activate the applicable ones depending on the country of use. This does not result in any additional effort when programming the coin validator. It is only necessary to determine the compensation value series beforehand for all coin values to be taken into account by means of laboratory measurements.
  • the assignment of the compensation value series to the coin values and the sensors is stored in the form of a matrix in a programmable fifth memory area.
  • the associated compensation value series is determined for a first coin value and a first sensor, which is used in this combination.
  • the compensation value is then determined using the temperature measured by the temperature sensor.
  • the compensation values can be assigned to the temperature ranges and the compensation value series in the form of a matrix in a programmable sixth memory area.
  • a so-called coin diverter is usually arranged, which is operated electromagnetically and directs the real coins into the cash register or an intermediate store and false coins into a return channel.
  • This control of the coin branches and other coin branches, for example for sorting, is usually also carried out via the microprocessor.
  • This has corresponding outputs for the purpose of controlling the functional elements.
  • the number of outputs is limited for certain reasons.
  • Corresponding assignment of the outputs of the coin validator and the control inputs of the functional elements is carried out by means of plug coding or other circuit measures.
  • One embodiment of the invention provides that the assignment of the authenticity signals or the coin values to the outputs can be stored in the form of a matrix in a seventh programmable memory area.
  • the assignment of the outputs is therefore individually programmable, which simplifies production. It is based on the fact that the variable sizes can be taken into account when programming the coins at the end of production. It is also conceivable to transfer all the variable data that have been created once in the form of a data block to the respective programmable coin validator of the same type.
  • Lock inputs are usually used to prevent signals from being output through the outputs, even if the authenticity check has detected the presence of a real coin. For this reason, after an authenticity signal has been determined, the lock inputs are queried within the microprocessor as to whether an issue is via the coin outputs of the microprocessor control can take place.
  • An embodiment of the invention provides that the assignment of the authenticity signals or the coin values to the lock inputs can be stored in the form of a matrix in a programmable eighth memory area. In this way, the assignment of the lock inputs to the coin values can be set as desired.
  • a coin validator 40 which has four sensors a, b, c, d. 10 also shows voltage-dependent measurement signals from sensors a to d as a function of time, for example when a 5 DM coin is inserted. As can be seen, four measurement curves are shown in time relation in the manner of bell curves, i.e. with a maximum and a certain area.
  • the sensor a measures the material at low frequency (MNF).
  • the sensor b measures the size at the top (GRO).
  • the sensor c measures the size below (GRU).
  • the sensor d measures the material at high frequency (MHF).
  • the peak or maximum values can be used as measured variables.
  • the measurement curve MNF is a characterization of the phase position.
  • the measurement curve relating to the amplitude is not shown.
  • the peak value can be determined from five measurement curves of the four sensors a to d. This is indicated in Fig. 1 (under the numbers 1 and 2, the letter P means the phase and the letter A the amplitude).
  • An average value can also be determined from the five measurement curves.
  • the intersection points MNFP / GRU or MNFA / GRU can also be determined.
  • the temporal position of the measurement curve GRU can be a measurement criterion.
  • a combination of the measured values GRO + MHF can also be used to form an authenticity signal.
  • the coin values or coin channels corresponding to all German coin values from 5 Pf to 5 DM are plotted in the vertical axis.
  • the sensors are indicated in the horizontal, but, as already mentioned, a sensor for both the phase and can also be used for the amplitude measurement.
  • the combinations compiled in the matrix according to FIG. 3 are each assigned a measured variable or a function. According to FIG. 2, it is stored in the third memory area at a specific address. 4 shows how the coin validator works.
  • the peak value of the phase curve MNFP selected during the comparison test is then compared with the assigned reference value.
  • This reference value is stored in a second memory area, not shown, in accordance with the addressing according to FIGS. 1 and 2.
  • a reference value pair so that it can be determined whether the actual value is within the band formed by the reference value pair or not. If the measured variable lies outside the band in the comparison, the test is continued. If it is within the band, a flag is set. In the manner described, a comparison is made for all coin value sensor combinations, and the comparison process can be ended when a specific coin value has been determined. If counterfeit money has been inserted, the check must take place until the end.
  • An electronic coin validator 10 has a test track 12, along which coins, how the coin 14 can run.
  • Sensors 16 1 to n are assigned to test section 12. They can be of conventional construction and work inductively, optically, capacitively and the like.
  • the sensors 16 are connected to a microprocessor 20 via a multiplexer 18, wherein the multiplexer 18 can also be part of the processor 10.
  • a temperature sensor 22 is also connected to the microprocessor 20 via the multiplexer 18.
  • the data of the sensors 16 and the temperature sensor 22 are analog data which are converted into binary data in the processor by means of an analog-digital converter.
  • the microprocessor contains a number of functional units, including preferably programmable memory areas.
  • at least one reference value must be stored for each sensor, with which the test signals generated by the sensors 16 are to be compared.
  • two reference values are provided for each sensor and coin value in order to create a so-called reference window into which the test signal must fall so that an acceptance or generation of an authenticity signal can take place with regard to the specific sensor and the coin value.
  • a corresponding output pulse is generated for the outputs 22a in the microprocessor 20, the outputs 1 to n being assigned to individual coin values or coin channels.
  • three outputs 24 are provided for sorting magnets G1 to G3. With 28 blocking inputs 1 to n are designated, via which, for example, blocking data are entered into the microprocessor 20, which determine whether the output of an authenticity pulse should take place via the outputs 22.
  • Y is another input that can represent an input function.
  • X denotes an output function of the microprocessor 20.
  • a programming unit 30 is connected to the microprocessor 20. Via the programming unit (PC) all variable data can be transferred to the microprocessor and thus programmed, e.g. 3, the reference signals in the third memory area and the addressing of the functions or measured variables.
  • PC programming unit
  • the analog output signal of a sensor is temperature-dependent. However, this temperature dependence also depends on the coin tested. There is therefore a characteristic connection with the temperature for each sensor-coin combination. This is shown in Fig. 6.
  • the temperature from 0 to 60 C is shown on the Y axis. This temperature range is divided into six ranges from 0 to 5. 6 shows 0 to n curves, where n can be larger, equal or smaller than the number of coin value sensor combinations. If, for example, three coin values are to be accepted by the coin validator and the number of sensors or test signals is 5, the total number of the combination can be 15. 15 combination curves would then have to be determined.
  • the combination curves are determined for all coin validators of one type using laboratory measurements.
  • the compensation curves are now stored in a memory area of the microprocessor 20. However, this is not done by storing the continuous curve, but by storing curve points that correspond to the temperature ranges 0 to 5, for example. This is shown in more detail in Fig. 7.
  • compensation values are shown on the X-axis and designated Step.
  • one step corresponds to an analog value of 10 mV.
  • the compensation value 0 results in the temperature range from 1 and 2 from 10 to 30 ° C.
  • the temperature range 0 i.e. from 0 to 10 ° C
  • there is a compensation value of -1 analogously in temperature range 3 the compensation value +1, in temperature range 4 the compensation value +2, in temperature range 5 the compensation value +3 etc.
  • a finer gradation of the compensation values can also be made possible.
  • FIG. 8 shows an allocation matrix of the compensation value series (hereinafter, instead of a compensation curve, one speaks of a compensation value series because of the pointwise approach to the compensation curve) to individual coin channels or coin values.
  • the coin values 0.5, 10 and 50 pfennigs and DM 1, -, DM 2, - and DM 5, - are shown.
  • n sensors are taken into account, for example coin sensor "low frequency; phase measurement sung “, coin sensor” low frequency; Amplitude measurement ",” Sensor size measurement above “,” Sensor size measurement below “and sensor” high frequency ".
  • These sensors are shown schematically in Fig. 10 of the coin validator 40.
  • the coin sensor a generates two test signals, namely a phase-dependent signal at a low frequency as well as an amplitude-dependent signal.
  • Sensor b applies to the size measurement of larger coins with a diameter greater than 24 mm.
  • Coin sensor c serves to measure the diameter of coins below 24 mm.
  • Coin sensor d serves to measure the material at a high frequency.
  • the other parts of the test device 40 are further expanded 8 that it can be seen in the matrix or table that each combination of coin value and sensor is assigned a specific series of coin values.
  • the 50 Pfenning coin is for the test signal "low frequency; Phase measurement "and also the amplitude signal assigned to row 1.
  • the sensors for size measurement are assigned to coin series 0.
  • the coin sensor n-1 is assigned to coin series 2 and the sensor for measurement with high frequency is assigned to coin series 1.
  • the numbers in the matrix therefore indicate with which "curve" compensation must take place when a certain coin is inserted.
  • the assignment table according to FIG. 8 is stored in a programmable memory area, for example in a RAM, an OT-PROM, an EEPROM, an EPROM etc.
  • the compensation value series according to FIG. 6 can also be stored in a fixed memory area (ROM).
  • the operation of the coin validator described is explained below with reference to FIG. 11.
  • the temperature value measured by the temperature sensor 22 is detected and digitized in the microprocessor 20. 6 are stored in a storage area.
  • the measured temperature value is assigned to a memory area 0 to 6. This happens regardless of whether a coin is being checked or not. If a coin is inserted, for example coin 14, the individual sensors 1 to n successively generate analog test signals which are temporarily stored in a memory area of microprocessor 20. After the last test signal has been saved, the comparison with the reference values begins. Since the coin validator does not know which coin value has been inserted, he must "play through" all of the accepted coin values in order to be able to carry out a perfect coin check.
  • the test signal begins, for example, with the coin value or coin channel 1 according to the matrix according to FIG. 8 and compares the test signal with the reference values for the individual sensors 1 to n. Before this comparison, however, the test signal is temperature compensated.
  • the coin value row 0 is decisive for the coin sensor 1 according to FIG. 8. With coin series 0, a predetermined compensation value results for the previously determined temperature range. This modifies the test signal before it is compared with the reference value for sensor 1. It is assumed that a reference window is provided. A flag is set if the compensated test signal is within the bandwidth of the window. If it is not within the bandwidth, the flag is deleted. The process described is now repeated for all further sensors 2 to n.
  • the compensated test signal for all sensors is within the bandwidth, it is a real 5 Pfennig coin and the test process can be canceled. If all or most of the test signals are outside the bandwidth, the comparison with the reference values for a further coin value is continued until a decision can be made as to which coin it is and whether it is genuine.
  • the reference value can also be compensated for.
  • the sensor MNF marked with a also represents a start sensor CP1.
  • the switching level U1 is the level which, when exceeded, allows the entire measuring routine of the coin validator to run. This value must be kept very low for coins with a very small amplitude. However, a very low switching level often leads to hypersensitivity of the start sensor. Therefore, efforts are made to raise the switching threshold for larger coins. It is therefore advantageous if the U1 switching threshold can be individually programmed via the microprocessor.
  • Sensor d serves as a stop sensor (CP2).
  • CP2 stop sensor
  • the controller determines which coin has been inserted and whether it is genuine.
  • the controller it is necessary for the controller to react quickly to determine whether the coin can be accepted or not so that the acceptance gate 42 can be activated.
  • the switching threshold U2 individually programmable in order to be able to intervene and adjust during production.
  • the level should of course be as low as possible in order to be able to draw more information from the course of the curve. If the number of processing operations in the microprocessor is large and / or the coverage of CP2 is large the individual test times can also be reduced by setting the switching threshold significantly higher.
  • the switching thresholds U1 and U2 are also stored in a programmable memory in order to relocate them as required.
  • the acceptance switch 42 is followed by an acceptance sensor CP3, the response of which can also be designed to be programmable.
  • FIG. 9 shows a further assignment matrix that can be stored in further programmable memory areas of the microprocessor 20.
  • the coin values are located on the Y axis and a number of coin pulse outputs 1 to 6 are located on the first part of the X axis (see FIG. 1). In the present case, the number of coin values is greater than the number of exits. It is therefore necessary to provide a specific assignment of the pulse outputs 22 for certain coins, which control functional units downstream of the coin validator 10, for example delivery of goods, delivery of a ticket, control of the credit facility, etc.
  • the assignment of coin value and coin pulse output is via the matrix, which stored in memory. However, it can be programmed as desired or reprogrammed at a later time. A corresponding assignment between the coin values or coin channels and the sorting magnets 26 takes place in the same way. Finally, this assignment also exists for coin lock inputs 28 as a function of the coin values.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
EP91112401A 1990-08-08 1991-07-24 Appareil accepteur de pièces de monnaie Expired - Lifetime EP0470439B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4025073A DE4025073C2 (de) 1990-08-08 1990-08-08 Verfahren zum Prüfen von zwei oder mehr Münzen unterschiedlichen Wertes
DE4025073 1990-08-08

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EP0470439A1 true EP0470439A1 (fr) 1992-02-12
EP0470439B1 EP0470439B1 (fr) 1996-04-24

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EP91112401A Expired - Lifetime EP0470439B1 (fr) 1990-08-08 1991-07-24 Appareil accepteur de pièces de monnaie

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DE (2) DE4025073C2 (fr)
ES (1) ES2087930T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1513111A1 (fr) * 2003-09-05 2005-03-09 IDX, Inc. Methode et appareil pour l'echange de données characteristiques de proprietes de pièces de monnaie entre des appareils accepteurs de pièces de monnaie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072189A2 (fr) * 1981-08-10 1983-02-16 LANDIS & GYR COMMUNICATIONS (U.K.) LTD. Procédé et dispositif pour calibrer un appareil de contrôle de pièces de monnaie

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60262292A (ja) * 1984-06-08 1985-12-25 株式会社田村電機製作所 硬貨検査装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072189A2 (fr) * 1981-08-10 1983-02-16 LANDIS & GYR COMMUNICATIONS (U.K.) LTD. Procédé et dispositif pour calibrer un appareil de contrôle de pièces de monnaie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1513111A1 (fr) * 2003-09-05 2005-03-09 IDX, Inc. Methode et appareil pour l'echange de données characteristiques de proprietes de pièces de monnaie entre des appareils accepteurs de pièces de monnaie

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DE4025073A1 (de) 1992-02-20
DE59107708D1 (de) 1996-05-30
DE4025073C2 (de) 1994-03-31
ES2087930T3 (es) 1996-08-01
EP0470439B1 (fr) 1996-04-24

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