ICE-PROTECTED ECHO SOUNDER Russian patent published in 2014 - IPC G01S15/00 

FIELD: physics.

SUBSTANCE: echo sounder includes a forward digital frequency synthesiser unit whose output is connected to the input of a transmitter, and the control input is connected to a microcontroller. By controlling radiation frequency, the forward digital frequency synthesiser unit enables to avoid the effect of varying parameters of the protective plate on the highest possible depth measured by the echo sounder.

EFFECT: avoiding the effect of varying parameters of the protective plate of the radiating surface of an electroacoustic transducer on the highest possible depth measured by the echo sounder by varying radiation frequency of the echo sounder.

2 dwg