EP 1172772 A2 20020116 - Method and apparatus for obtaining physical characteristics of coins for their identification
Title (en)
Method and apparatus for obtaining physical characteristics of coins for their identification
Title (de)
Verfahren und Einrichtung zum Feststellen von physikalischen Münzeigenschaften für ihre Identifikation
Title (fr)
Procédé et dispositif pour obtenir des caractéristiques physiques de pièces de monnaie pour leur identification
Publication
Application
Priority
ES 200001640 A 20000630
Abstract (en)
Method and apparatus for obtaining physical characteristics of coins for their identification, which consists in submitting the coins to two consecutive stages of electromagnetic measurement, defined by a first and a second pairs of coils, in one of said pairs the coils are connected in such a manner that their magnetic fields are added and in the other in such a way that their magnetic fields are subtracted, which stages providing signals which are processed to obtain parameters representative of the coin, characterised in that the four coils are connected to each other according to a bridge configuration and in that they are supplied simultaneously with at least two, and preferably 3, signals of different frequencies, obtaining simultaneously in each stage, on passage of the coins, two full bridge signals for each frequency and a further two half-bridge signals for the highest frequency, in each case one of the signals being representative of the variation of the resistive component. <IMAGE>
IPC 1-7
IPC 8 full level
G07D 5/08 (2006.01)
CPC (source: EP)
G07D 5/08 (2013.01)
Citation (applicant)
- US 3870137 A 19750311 - FOUGERE GUY L
- US 4754862 A 19880705 - RAWICZ-SZCZERBO ADAM [GB], et al
- WO 9302431 A1 19930204 - C T COIN A S [DK]
- WO 9321608 A1 19931028 - MARS INC [US]
- WO 9322747 A1 19931111 - MARS INC [US], et al
- US 5337877 A 19940816 - WAITE TIMOTHY P [GB], et al
- EP 0724237 A2 19960731 - ASAHI SEIKO CO LTD [JP]
- EP 0805423 A2 19971105 - LANDIS & GYR TECH INNOVAT [CH]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1172772 A2 20020116; EP 1172772 A3 20040107; ES 2170678 A1 20020801; ES 2170678 B1 20030916
DOCDB simple family (application)
EP 01500162 A 20010628; ES 200001640 A 20000630