METHOD OF IDENTIFYING SUBJECT ON SERVICED OBJECT AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC H04H60/76 

FIELD: physics.

SUBSTANCE: device that implements the proposed method contains n identifiers located on the objects, a smart key 2 that the subject is equipped with, and a dispatch centre 7. Each identifier contains a piezoelectric crystal 1i, a transceiver antenna 8i, electrodes 9i, buses 10i and 11i, a set of reflectors 12i, an accessibility block to the CT 36i, a narrowband filter 37.i, an amplitude detector 38i, keys 39i and 40i (i=1, 2, …, n). The smart key 2 comprises a reader 3, a microcontroller 4, a transceiver 5, a LED 6, a transmit and receive antenna 15, a bandpass filter 16 and 22, phase detectors 17 and 25, multipliers 18 and 23, narrowband filters 19 and 24, a phase manipulator 20, a power amplifier 21, a duplexer 14, a synchronizer 41, a carrier frequency synchronizer 42, and an AND logic gate 43. The dispatch centre 7 includes a master oscillator 30, a computer 31, a multiplier 32, a narrowband filter 33, a phase manipulator 34, a power amplifier 35, a duplexer 27, a transmit and receive antenna 26, a bandpass filter 28, and a phase detector 29.

EFFECT: increasing the reliability of reading individual codes simultaneously from several objects located in the radio exposure zone, by successive radio questioning them in time.

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