An active card communication system and method based on working clock calibration
A working clock and clock calibration technology, which is applied to the record carrier used by the machine, the instrument, the induction record carrier, etc., can solve the problems of large service life gap, large clock deviation, product maintenance, upgrade, recycling, etc., and achieve improvement The communication success rate and the effect of improving the service life
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[0018] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.
[0019] The invention discloses an active card communication system based on working clock calibration, such as figure 1 As shown, it includes a card reading device 1 and an active card 2, and the two establish communication in a wireless manner, the card reading device 1 has a built-in device counter 3, and the active card 2 has a built-in clock calibration module 4 and Card counter 5, the clock calibration module 4 is used to determine whether the count value of the device counter 3 is equal to the count value of the card counter 5 after the card reader device 1 and the active card 2 establish communication:
[0020] If they are equal, the working clock calibration process is ended;
[0021] If they are not equal, the count value of the device counter 3 is written into the card counter 5, so that the working clocks of the card reading device 1 ...
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