APPARATUS FOR DETECTING PEOPLE UNDER DEBRIS AND SEARCHING FOR EXPLOSIVES AND NARCOTICS Russian patent published in 2014 - IPC G01V15/00 G01V3/12 G01S1/00 G01S3/00 

FIELD: radio engineering, communication.

SUBSTANCE: apparatus for detecting people under debris and searching for explosives and narcotics comprises, worn on a tracker dog 1, a collar 2, a mobile primary converter 3 and a secondary converter 12. The primary converter 3 comprises tactile sensors 4.1 and 4.2, a switch 5, an amplifier 6, a modulator 7, a radio transmitter 8, a power supply 9, a light 10 a sound 11 beacon, a driving generator 18, a phase-shift modulator 19, a flip-flop 17, a unipolar rectifier diode 20, an integrator 21, a threshold unit 22, a switch 23, a power amplifier 24 and a transmitting antenna 25. The secondary converter 12 comprises a dipole antenna 26, a frame antenna 27, high frequency amplifiers 28 and 29, amplitude detectors 30 and 31, a divider unit 32, a threshold unit 33, a switch 15, demodulators 14 and 44, multipliers 34, 35, 38 and 39, narrow-band filter 36 and 40, low-pass filters 37 and 41, phase inverters 42 and 43, a subtractor unit 45 and a recorder 16.

EFFECT: high noise-immunity and reliability of receiving and demodulating phase-shift modulated composite signals by suppressing narrow-band interference.

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