DIRECTION FINDER OF LOW-FREQUENCY NOISE SIGNALS FOR MOBILE SYSTEMS FOR DETECTING LOW-NOISE UNDERWATER OBJECTS Russian patent published in 2024 - IPC G01S15/00 

FIELD: hydroacoustics.

SUBSTANCE: hydroacoustic passive systems for determining the position of underwater noisy objects, and in particular the field of receiver antennas that determine the direction to the source of the noise signal. The direction finder contains as a receiver antenna a combined vector-scalar sound receiver, consisting of a sound pressure receiver and a three-component vibrational velocity receiver with a common phase center, having one vertical and two horizontal channels that measure acoustic pressure and components of the vibrational velocity vector in the horizontal plane and performing calculations and averaging of horizontal components of the intensity vector. In this case, the combined receiver additionally contains a second pair of orthogonal horizontal receiving channels, geometrically rotated relative to the first pair at an angle of 45°.

EFFECT: creation of a compact antenna for determining the position of an underwater noisy object based on a combined vector-scalar sound receiver for use in mobile systems for monitoring the underwater situation, for example, when placing a direction finder on board autonomous uninhabited underwater vehicles or gliders.

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