NONCONTACT COMMUNICATION METHOD, ITS MEDIUM AND DEVICE, PASSENGER CARD AND AUTOMATIC TICKET EXAMINATION MACHINE

摘要

PROBLEM TO BE SOLVED: To attain the assured use of passenger cards even if they are put on each other and also to construct the software and hardware for that purpose just by adding the simple constitutions in a noncontact automatic ticket examination system or the like. SOLUTION: When the noncontact communication is performed between both passenger cards 6a and 6b and a train boarding information read/write machine 4 respectively, each of both cards 6a and 6b controls at random the connection and disconnection of a capacitor 9 constructing an LC resonance circuit in response to the application of its power supply. Then the machine 4 transmits the communication start commands CSC to the cards 6a and 6b when the communication is possible between these cards and the machine 4. Meanwhile, the cards 6a and 6b fix and holds the connection/disconnection states of the capacitor 9 when the commands CSC are received from the machine 4.