SYSTEM FOR DETECTION OF HUMAN BEING SUFFERING DISTRESS ON WATER Russian patent published in 2010 - IPC B63C9/20 

FIELD: salvage operations.

SUBSTANCE: system contains life jacket put on a person, and receiver installed at control post. Life jacket comprises source of light, cable, cartridge, membrane, lever, contact, tight cavity, sealing ring, transmitter with transmitting antenna on each side. Besides jacket includes a source of energy and pneumatic manifold. Receiver comprises the first (23), second (24), third (25) and fourth (45) receiving antennas, the first (26), second (27), third (28) and fourth (46) amplifiers of high frequency, the first (29) and second (30) heterodynes, the first (31), second (32), third (33) and fourth (47) mixers, the first (34), second (35), third (36), fourth (48), fifth (56), sixth (57) and seventh (58) amplifiers of intermediate frequency, the first (37), second (39), third (40), fourth (61), fifth (67), sixth (73) and seventh (79) multipliers, the first (38), second (41), third (42), fourth (62), fifth (68), sixth (74) and seventh (80) narrowband filters, the first (43), second (44), third (59), fourth (65), fifth (71) and sixth (77) correlators, the first (49), second (50), third (60), fourth (66) fifth (72) and sixth (78) threshold units, the first (51), second (52), third (63), fourth (69), fifth (75) and sixth (81) keys, the first (53), second (54), third (64), fourth (70), fifth (76) and sixth (82) phasemetres, unit of registration (55).

EFFECT: expanded range of system working frequencies without expansion of heterodyne frequency tuning range by application of mirror reception channels.

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