HYDROACOUSTIC SYSTEM FOR NEAR ILLUMINATION Russian patent published in 2015 - IPC G01S15/02 

FIELD: radio engineering, communication.

SUBSTANCE: hydroacoustic system for near illumination includes an underwater module in the form of a sealed housing in which there is an antenna unit, an emitted signal generating unit, having series-connected generator, tapped delay line and multichannel amplifier, and a received signal processing unit which includes series-connected receiving amplifier unit and analogue-to-digital converter unit, as well as a processing and graphical display unit connected by a cable link to the output of the underwater module; the underwater module is provided with a multichannel switch which is connected between the antenna unit, the multichannel amplifier and the receiving amplifier unit, as well as a switch control unit, the input of which is connected to the output of the analogue-to-digital converter unit, and the output is connected to the input of the generator, and an interface included between the switch control unit and the cable link, wherein the antenna unit is in the form of a multi-element linear antenna, the processing and graphical display unit is in the form of a surface module which is placed on a floating platform and includes, connected in series to the output of the interface, an unpacking unit, a correlator unit, a sectioning unit, a focusing delay unit, a beam pattern former unit, an acoustic image forming unit with a graphic display and a control unit; wherein the surface module is mounted to the surface platform by a bar with a servo drive capable of rotating about an axis, and the control unit is connected between the servo drive and the acoustic image forming unit.

EFFECT: faster space scanning, wider scanning sector width, higher angular resolution, simple design of the antenna unit.

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