DIRECTION FINDER OF HYDROACOUSTIC SIGNALS, FORMING STATIC FAN OF SPATIAL CHANNELS Russian patent published in 2023 - IPC G01S3/80 

FIELD: hydroacoustics.

SUBSTANCE: hydroacoustic means of detecting signals used for small-sized carriers such as underwater vehicles, bottom hydrophysical stations, sonobuoys. The direction finder consists of a cylindrical sound-transparent antenna and a radio part. On the guide of the cylindrical antenna there are 2N hydroacoustic receivers, which are placed evenly at intervalsΔθ =360/2N. Signals from hydroacoustic receivers are transmitted to the spatial channel generation unit, in which a fan of 2N spatial channels with directional patterns (DP) of the “reverse” cardioid type is formed. The spatial channel with the maximum value of the received signal (RS_m) is selected and the direction to the θ_m signal source is determined, corresponding to the RS_m axis of the DP. By signal voltage difference Δ U=U_r -U_l, received by the RS_m channels adjacent to RS_m and RS_r and PC_l, as well as according to a pre-introduced correction dependenceξ_θ (Δ U) the true value is determined by the signal sourceθ_tr =θ_m+ξ_θ.

EFFECT: increasing the accuracy of the amplitude direction finding method used in the signal detection mode using a static RS fan, while maintaining the dimensions of the antenna, the number of receivers and without shielding the receivers.

1 cl, 4 dwg