HUMAN DETECTION SYSTEM FOR MARITIME DISTRESSES Russian patent published in 2009 - IPC B63C9/00 B63C9/20 

FIELD: rescuing facilities.

SUBSTANCE: invention relates to rescuing facilities and may be used for detecting persons suffering distress on water and their location. The system includes life jacket with two light sources one being in the region of chest, while the other is in the back region of life-jacket, transmitters and transmitting aerials, and receiver located in the control point. In addition receiver includes receiving aerials (23, 24, 25), high-frequency amplifiers (26, 27, 28), heterodynes (29,30), mixers (31, 32, 33), intermediate frequency amplifiers (34, 35, 36), multiplier (37, 39, 40), narrow-band filters (38, 41, 42, 57), correlator units (43, 44), threshold units (45, 46, 49, 50), switches (47, 48, 51, 52), phase detectors (58), phase doubler (56), recording unit (55).

EFFECT: improved stability of system receiver by ensuring symmetry of received disaster signals carrier frequency ω_c regarding heterodynes ω_h1 and ω_h2 frequency.

6 dwg