| 摘要 |
FIELD: life-saving in water. ^ SUBSTANCE: device has jacket putting on man and provided with two light sources, transmitters with transmitting aerials, and receiver positioned at the control point. The receiver has receiving aerials (23), (24), and (25), amplifiers (26), (27), and (28) of high frequency, heterodynes (29) and (30), mixers (31), (32), and (33), amplifiers of intermediate frequency (34), (35), and (36), multipliers (37), (39), and (40), narrow-band filters (38), (41), and (42), blocks (43), and (44) of correlators, threshold blocks (45), (46), (49), and (50), switches (47), (48), (51), and (52), and recording block (55). ^ EFFECT: enhanced noise immunity. ^ 6 dwg |
