FIELD: physics.
SUBSTANCE: system, realising offered method, contains radio-frequency identifiers, input reader transmitting radio modem with the antenna, electronic computer and receiving radio modem with the antenna. The input reader contains master oscillator, circulator, radio-frequency amplifier and phase detector. The transmitting radio modem contains lag line, generator of pseudorandom sequence, phase manipulator, adder, refactor, narrow-band filter and power amplifier. The radio-frequency identifier contains piezocrystal, microstrip antenna, busbars, electrodes.
EFFECT: increase of accuracy and reliability of monitoring of mobile objects in the closed premises by use of difficult signals with phase manipulation and trusty radio-frequency identifiers on the superficial ultrasonic waves.
2 cl, 5 dwg
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