COMPLEX NOTICING PASSAGE OF OBJECT IN AQUEOUS MEDIUM Russian patent published in 1997 - IPC

FIELD: recording of hydrodynamic vibrations of preset frequency range and limited registration zone with optimal change of distance to object and transmission of information practically over any distances. SUBSTANCE: transmitter of complex is mounted on mobile element with positive buoyancy that is connected to actuator which moves it between point of attachment of control unit with power supply pack and surface of aqueous medium. Hydrophone with slit collimator that is connected to frequency filter and control unit via it is anchored in same point. EFFECT: reliability of recording of hydrodynamic vibrations of preset frequency range. 1 cl, 2 dwg