EP1180745A2 - Coin validation apparatus - Google Patents
Coin validation apparatus Download PDFInfo
- Publication number
- EP1180745A2 EP1180745A2 EP01306981A EP01306981A EP1180745A2 EP 1180745 A2 EP1180745 A2 EP 1180745A2 EP 01306981 A EP01306981 A EP 01306981A EP 01306981 A EP01306981 A EP 01306981A EP 1180745 A2 EP1180745 A2 EP 1180745A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coin
- signals
- validator
- sensor signals
- circuit board
- 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- Withdrawn
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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
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D2205/00—Coin testing devices
- G07D2205/001—Reconfiguration of coin testing devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
Abstract
Description
- This invention relates to the field of electronic coin recognition or "validation".
- There are many millions of existing "unattended points of sale" in use throughout Europe and the rest of the world. These machines are used in vending, gaming, ticket dispensing and pay telephone applications, for example. Whenever a coin type is changed or a new coin added, these unattended points of sale need to be changed as well.
- In general, data representing limits of parameters of valid coins are stored and parameters measured for a coin being tested are compared with these to validate or reject a coin. Older coin validators, had this data stored in non erasable programmable read only memory (PROM). Each time a change was necessary a new PROM was burnt. In order to be replaceable the PROMS were mounted in integrated circuit sockets, e.g. dual in line (DIL) sockets. It was necessary to burn the new PROM individually for its intended validator because of the differences due to mechanical and electrical tolerances in each individual validator. A problem has arisen recently, however. The PROMs are obsolete and existing stocks are, naturally, dwindling thereby increasing in value due to scarcity. They will, eventually, run out. That would make the validators obsolete when the next coin change occurs.
- Against this background, a coin validator in accordance with one aspect of the invention has magnetic and/or optical sensors operative to provide sensor signals determined by particular characteristics of a coin to be validated; a main circuit board containing drivers for providing driver signals to operate the sensors and a signal processor to receive the sensor signals and stored data representing limits of the sensor signals corresponding to one or more valid coins, to provide one or more validation signals indicative that a respective coin has been validated, the data being stored in a non-volatile electrically re-programmable read only memory device mounted in a subsidiary assembly and interfaced to pins positioned in the subsidiary assembly to engage an integrated circuit socket mounted on the main circuit board so as to provide the data to the signal processor, the subsidiary assembly also having means to select whether the electrically re-programmable read only memory is in read mode or write mode.
- This enables an "old" validator, designed for use with a PROM, to be rejuvenated with a readily available electrically re-programmable read only memory (EEPROM). Once the replacement has been made, future changes, which may have to be made in the field anyway, can be made without the need for further replacement.
- Although, by using a new PROM or by replacement with the EEPROM, in many cases the coin validation parameters can be simply re-programmed, older validation units may not have the processing discrimination performance to securely recognise newer designs of coins, particularly plated coins and concentric bi-metallic coins such as the
GB 2 pound and the 1 & 2 Euro coins. - One solution to that problem is to replace the entire circuit board of a coin validator with a new one conforming to the required standards. However, a second aspect of the invention is based on the realisation that this is not necessary.
- In accordance with the second aspect of the invention, there is provided a coin validator, having magnetic and/or optical sensors operative to provide sensor signals determined by particular characteristics of a coin to be validated; a first circuit board containing drivers for providing driver signals to operate the sensors, a first signal processor for receiving and evaluating the sensor signals and stored data representing limits of the sensor signals corresponding to one or more valid coins, to provide one or more first validation signals indicative that a respective coin has been validated, a second circuit board connected to the first circuit board to receive the sensor signals; and a second signal processor to receive and evaluate the sensor signals and stored data representing limits of the sensor signals corresponding to one or more valid coins, to provide one or more second validation signals indicative that a respective coin has been validated.
- This enables the performance of a validator to be enhanced without replacing the whole circuit board, since the drivers from the old board are still used.
- Preferably, the second circuit board includes means for receiving the first validation signals and the second validation signals said means being operative selectively to switch the first or second validation signals to an output connector. This enables the new board to be fitted in advance and the validator can continue to run on the old board only, until such time as, say, the 1 and 2 Euro coins become legal tender.
- Another way of improving performance would be to replace a complete older coin validator with an up to date version. Again, in older apparatus at unattended points of sale, e.g. using change givers this proposal would often cause a problem. Such older apparatus was designed to be used with a validator of particular physical dimensions and to receive a particular set of validation signals. More recently there has been a change in the physical dimensions, newer validators are narrower, and have an incompatible signal set. The desire to upgrade the validator of such an older apparatus giver would thus render the entire apparatus obsolete.
- In accordance with a third aspect of the invention, there is provided apparatus intended for use with a first coin validator having a relatively large width and providing a first set of output coin validation signals, said apparatus being fitted with a cradle in place of the first coin validator, said cradle carrying a second coin validator having a relatively small width and providing a second set of output coin validation signals, said cradle positioning the second coin validator so that coin slots and a coin return button are placed correctly in relation to the apparatus and carrying an interface to convert the first set of coin validation signals to the second set. Otherwise obsolete apparatus can thus be rejuvenated by fitting a higher performance normally incompatible "new" coin validator.
- Examples of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
- Figure 1 illustrates the main components of a coin change giver;
- Figure 2 illustrates a circuit board utilised in a first embodiment of the first aspect of the invention;
- Figure 3 illustrates the circuit board of Figure 2 in position on the first embodiment of the first aspect of the invention;
- Figure 4 illustrates another circuit board utilised in a second embodiment of the first aspect of the invention;
- Figure 5 is a scrap view of the second embodiment of the first aspect of the invention;
- Figure 6 is a block diagram of the circuit on the circuit boards illustrated in Figures 2 and 4;
- Figure 7 illustrates a circuit board utilised in an embodiment of the second aspect of the invention;
- Figure 8 is a block diagram of the circuit of the board of Figure 7; and
- Figure 9 illustrates physical features of the board of Figure 7;
- Figure 9a is a scrap section on arrows A-A of Figure 9 and
- Figure 10 illustrates a coin validator and carrier utilised in an embodiment of the third aspect of the invention.
-
- As an example, the enhancement of a typical coin change giver as used in many millions of vending machines is described.
- Figure 1 illustrates the main components of a coin change giver. A
coin validator 2 is used to recognise a valid coin, which is then routed to either a cashbox of the machine (not shown), or to replenishchange tubes 4 via aseparator 6. Thechange tubes 4 are used to give the consumer change at the end of the vending transaction. Thecoin validator 2,change tubes 4 andseparator 6 are mounted in achassis 8 together with acontrol board 10, a power supply (not shown)and interfaces to the remainder of the vending machine (not shown). - The
coin validator 2 represents only a proportion of the overall cost of the change-giver. It is clearly advantageous to the vending machine owner to be able to minimise the cost of changing their machine to operate with a new coin or coins. - There are many descriptions of prior art showing the methods used for coin validation, which may include inductive or optical sensors for detecting the size, shape and material of a coin. A detailed example of this is disclosed in US patent number 4601380. Validators of design similar to this and other patent descriptions have been used widely throughout the world for many years.
- The
coin validator 2 has a slot orchute 12 for receiving coins to be validated. Coins pass down a slope past sensors which may be magnetic or magnetic and optical. The sensors provide sensor signals dependent on characteristics such as the thickness, diameter and electrical conductivity of the coin. The sensor signals are processed by a processor carried by acircuit board 14. This also carries drivers for each of the sensors and one or more integratedcircuit sockets PROM 20 is shown in thesocket 18. - In the past, when a coin change was made, the data relevant to the changed coin set was burned into a new PROM. This was often done in the field using a set of specimen coins so as to take into account the electrical and mechanical tolerances of the individual coin validator. To this end, the sensor signals are available at a
connector 22 mounted on theboard 14. - The PROMs are now obsolete and in short supply. The impending introduction of the Euro coins implies all coin validators will need to be updated throughout the Euro zone.
- In order to overcome this problem a
replacement memory assembly 24 is illustrated in thesocket 16. This is shown in more detail in Figure 2. The PROM is substituted by an electrically re-programmable read only memory component, in this example anintegrated circuit 26. In the example illustrated the integrated circuit (IC) 26 is a surface mount component and is also electrically erasable. TheIC 26 is mounted on acircuit board 28 with a set ofpins 29 arranged to fit thesocket 16. In the case illustrated there are 16pins 29. For safety, the board may be secured removably to theconnector 22 which it overlaps. Theboard 24 also carries a jumper, switch orfurther connector 30 by which thememory IC 26 can be set to read or write mode. Another jumper switch orconnector 31 allows different coin sets to be selected, e.g. French coins and alternatively Euro coins. - Referring to Figure 6, the address and data pins of the
memory IC 26 are connected on theboard 28 toappropriate pins 29 along with the chip select pin CS and supply voltages. - The memory IC's write enable pin
WR and read enable pinOE , are alternatively selected by operation of a switch SW1. A pull up resistor R1 connects the input of aninvertor 33 to the supply rail +ve. The output of theinvertor 30 is coupled to the read enable pinOE and to the input of anotherwriter 35 the output of which is connected to the write enable pinWR . - Thus closing the switch S1 enables the
memory IC 26 to be written and opening the switch enables the memory to be read. - The memory component may be any non-volatile type such as an EPROM, FLASH or EEPROM type.
- An alternative arrangement of the memory assembly is illustrated in Figures 4 and 5. Validators for some games machines have a
casing 32 in which anaperture 34 is provided to give access to the PROM so that it can be replaced in thesocket 16. The size of theaperture 34 is sufficient to replace the PROM but there is not a great surplus. I have found there is sufficient space to receive a memory assembly arranged as shown in Figure 4. Here the width is narrow enough to be received by the available aperture. As illustrated in Figure 5, thememory 26 end of the board can be inserted at an angle under the case so as to align thepins 29 with thesocket 16 into which the pins are then inserted. SW1 is in the form of pins to receive a jumper in this example. - Figure 7(a) shows the connections between the
coin validator 2 and thecontrol board 10. Figure 7(b) shows the connection of an additional circuit board to provide processing for enhanced coin discrimination. - Figure 8 shows a block diagram of the circuitry on the additional circuit board (7). As may be seen from Figure 9, the
additional board 36 has aconnector 38 by which it receives the sensor signals available at theconnector 16. The sensors are operated by the drivers on theboard 14. The sensor signals received by theconnector 38 are processed by agate array 40 whose function is explained below. The processed signals are fed to data inputs of a signal processor in the form of amicro controller 42. The data representing limits for the sensor signals to correspond to one of a set of coins is stored in anEEPROM 44. These data are accessed by thecontroller 42 to evaluate the validity of a the coin sensed by the sensors.Outputs 46 on individual leads indicate which, if any, coin has been validly sensed. Alternatively the outputs may be coded, e.g. a binary code. These are input to amulitplexer 50 with theequivalent signals 48 from the "old"board 10. A manually settable select signal determines which input the multiplexer selects. The select signal is also input to a select chip input of thecontroller 42 so that when the signals from theprocessor 42 are selected, it is operative. - The select input may be provided by either a switch, or a "jumper". The "old"
board 14 can thus be used, for example, until a new coin set becomes legal tender when theadditional board 36 with the enhanced discrimination performance can be selected. When selecting the original coin set the signals to and from thevalidator 2 are routed directly through the additional board. When selecting the new coin set with enhanced discrimination, the coin outputs 50 and an ACCEPT strobe signal come from themicro-controller 42. - The
additional board 36 takes measurements directly from the sensor signals rather than from the processed coin outputs from the existing validation board. These signals often oscillator or optical detector outputs, are used for the factory or field programming of the validator. Through measuring the sensors directly, with the aid of the logic in thegate array 40, themicro-controller 42 is able to apply signal processing to the sensor responses to a performance similar to state of the art coin validators, rather than the level applied by the older design within the original validator. Specifically in this example, thegate array 40 makes time period, frequency and amplitude measurements permitting additional parameters to be extracted from the diameter sensor, the thickness sensor and the material sensors to improve the validation of concentric bi-metallic coins, such as theGB 2 pound coin. The programme in themicro-controller 42 takes these measurements and processes the variations in frequency or time period to extract the coin parameters which are then compared with the expected responses of valid coins programmed into thenon-volatile memory 44 on theadditional board 36. Aserial port 52 is provided into themicro-controller 42 to permit programming of the set of coins to be recognised, and any future re-programming as the coins change. - The described techniques are equally applicable to coin discriminators and change-givers manufactured by different companies.
- For change-givers as illustrated in Figure 1 and, indeed other apparatus utilising the older coin validators, an alternative means of enhancing the discrimination performance is the complete replacement of the
validator 2 with a state of the art commerciallyavailable validator 56 shown in Figure 10. To provide compatibility with the original validator electrically and mechanically, acradle 58 and aninterface circuit 60 are used. Typicallyold validators 2 are approximately 5 inches (125mm) wide whereas the current state of the art validators are approximately 4 inches (100mm) wide and use different fixing systems. In order to mount the cradle in an "old" change giver or other apparatus, the cradle is provided withhooked rails 62 one on each side. (only one is shown in Figure 10.) These are hooked onto pins projecting into the cavity 64 (Figure 1) intended to receive thevalidator 2. As the bottom of thecradle 58 is swung in, latches engageapertures 66 on each side of the cradle, only one being shown in Figure 10. In the case illustrated, thenew validator 56 has fourpins 68 projecting from its casing, two on each side. Only one is visible in Figure 10. Thecradle 58 provides acavity 70 having a width suitable to receive thenew coin validator 56. Opposed walls of thecavity 70 have hookedchannels 74 to receive thepins 68. The down turnedhook 76 in each channel receives the respective pin to retain the validator 56 in the cradle. In order to function correctly, thenew validator 56 must have itsinlet coin slot 12, its outlet coin slot (not shown) and itscoin return button 78 located relative to one another to match the relative locations of these elements of theold validator 2. Thecavity 70 of thecradle 58 must position the features to match the "old" change giver or other apparatus. - The "old" change giver is designed to receive active high signals on one of six lines, individual to a respective coin. Thus to validate a coin a corresponding line goes high to identify the coin. The active-high signal is accompanied by a validation strobe or pulse signal. Generally, the "new" validators have active low outputs, again on six lines, but there is no validation stroke signal. The signals may, again, be on an individual line for a respective coin, or may be coded. The
cradle 58 carries aninterface 78 which receives the active low signals from thevalidator 56 and decodes them if necessary and produces active high signals at six pins of aconnector 80. A validation strobe signal is also produced to accompany each coin identifying single line output signal. - The
change tubes 4 may also require adaptation to the new coin types through the widely used technique of inserting a sleeve into the tubes for smaller coin diameters. - The described techniques are equally applicable to coin discriminators and change-givers manufactured by many different companies.
Claims (9)
- A coin validator, having magnetic and/or optical sensors operative to provide sensor signals determined by particular characteristics of a coin to be validated; a main circuit board containing drivers for providing driver signals to operate the sensors and a signal processor to receive the sensor signals and stored data representing limits of the sensor signals corresponding to one or more valid coins, to provide one or more validation signals indicative that a respective coin has been validated, the data being stored in a non-volatile electrically re-programmable read only memory device mounted in a subsidiary assembly and interfaced to pins positioned in the subsidiary assembly to engage an integrated circuit socket mounted on the main circuit board so as to provide the data to the signal processor, the subsidiary assembly also having means to select whether the electronically re-programmable read only memory is in read mode or write mode.
- A coin validator as claimed in claim 1 wherein the subsidiary assembly includes means to select data for different coin sets.
- A coin validator as claimed in claim 1 or 2, wherein the means to select read or write mode and/or to select different coin sets are a respective manually operable switch or jumper.
- A coin validator, having magnetic and/or optical sensors operative to provide sensor signals determined by particular characteristics of a coin to be validated; a first circuit board containing drivers for providing driver signals to operate the sensors, a first signal processor for receiving and evaluating the sensor signals and stored data representing limits of the sensor signals corresponding to one or more valid coins, to provide one or more first validation signals indicative that a respective coin has been validated, a second circuit board connected to the first circuit board to receive the sensor signals; and a second signal processor to receive and evaluate the sensor signals and stored data representing limits of the sensor signals corresponding to one or more valid coins, to provide one or more second validation signals indicative that a respective coin has been validated.
- A coin validator as claimed in claim 4, wherein the first circuit board bears a first connector providing access to the sensor signals for calibration in order to write the stored data; and wherein the second circuit board bears a second connector, connected to the first connector, in order to receive the sensor signals.
- A coin validator as claimed in claim 3, wherein the second circuit board includes means for receiving the first validation signals and the second validation signals said means being operative selectively to switch the first or second validation signals to an output connector.
- A coin validator as claimed in claim 3 or claim 4, wherein the first circuit board carries a non-erasable programmable read only memory containing the data for the first processor.
- A coin validator as claimed in any of claims 4 to 7, wherein the second processor is arranged to determine from the sensor signals coin characteristics additional to those which the first process is arranged to determine.
- Apparatus intended for use with a first coin validator having a relatively large width and providing a first set of output coin validation signals, said apparatus being fitted with a cradle in place of the first coin validator, said cradle carrying a second coin validator having a relatively small width and providing a second set of output coin validation signals, said cradle positioning the second coin validator so that coin slots and a coin return button are placed correctly in relation to the apparatus and carrying an interface to convert the first set of coin validation signals to the second set.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0020063 | 2000-08-16 | ||
GB0020063A GB0020063D0 (en) | 2000-08-16 | 2000-08-16 | Enhanced coin recognition for vending machines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1180745A2 true EP1180745A2 (en) | 2002-02-20 |
EP1180745A3 EP1180745A3 (en) | 2004-05-06 |
Family
ID=9897638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01306981A Withdrawn EP1180745A3 (en) | 2000-08-16 | 2001-08-16 | Coin validation apparatus |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1180745A3 (en) |
GB (1) | GB0020063D0 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4601380A (en) | 1981-02-11 | 1986-07-22 | Mars Incorporated | Apparatus for checking the validity of coins |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2199978A (en) * | 1987-01-16 | 1988-07-20 | Mars Inc | Coin validators |
US5067604A (en) * | 1988-11-14 | 1991-11-26 | Bally Manufacturing Corporation | Self teaching coin discriminator |
US6039645A (en) * | 1997-06-24 | 2000-03-21 | Cummins-Allison Corp. | Software loading system for a coin sorter |
-
2000
- 2000-08-16 GB GB0020063A patent/GB0020063D0/en not_active Ceased
-
2001
- 2001-08-16 EP EP01306981A patent/EP1180745A3/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4601380A (en) | 1981-02-11 | 1986-07-22 | Mars Incorporated | Apparatus for checking the validity of coins |
Also Published As
Publication number | Publication date |
---|---|
GB0020063D0 (en) | 2000-10-04 |
EP1180745A3 (en) | 2004-05-06 |
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