| 摘要 |
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 ëc regarding heterodynes ëh1 and ëh2 frequency. ^ 6 dwg |
