METHOD AND APPARATUS FOR JUDGING MALFUNCTION OF NONCONTACT TYPE IC CARD

METHOD AND APPARATUS FOR JUDGING MALFUNCTION OF NONCONTACT TYPE IC CARD

PROBLEM TO BE SOLVED: To enable automatic failure judgment for noncontact type IC cards in a short-time. SOLUTION: The AC voltage of a single-frequency AC power source 21 coinciding with the tuning frequency of a noncontact type IC card 10 is transmitted to the IC card 10 from a signal transmitting...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KAWAKITA TATSUJIRO, MINE SHINICHI
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
HANDLING RECORD CARRIERS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
TESTING
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Zusammenfassung:PROBLEM TO BE SOLVED: To enable automatic failure judgment for noncontact type IC cards in a short-time. SOLUTION: The AC voltage of a single-frequency AC power source 21 coinciding with the tuning frequency of a noncontact type IC card 10 is transmitted to the IC card 10 from a signal transmitting unit 22. From the current value of an ammeter 24 and the voltage value of a voltmeter 23 at that time, an impedance is calculated in an impedance calculating unit 25, and the value is compared with a normal value by a comparator (failure judgment) unit 27 to judge the occurrence of a failure and its kind.