COMBINED HYDRO ACOUSTIC RECEIVER Russian patent published in 2015 - IPC G01S7/526 

FIELD: physics.

SUBSTANCE: this receiver comprises sealed spherical case filled partially with fluid to the level corresponding to zero case buoyancy in working fluid. Two piezoelectric elements of hydrophone channel built around sealed polarised-in-opposition piezoelectric film inverters are secured outside said spherical case opposite each other. Two pairs of bimorphs incorporated with components (x, y) of vector channel and two pairs of bimorphs vector channel component (z) are built around sealed piezoelectric film inverters. Sensitivity axes of the latter make the orthogonal system of coordinates with origin aligned with the spherical case centre. All bimorphs of three-component vector channel are arranged outside said spherical case. Inner ends of every of the fourth pairs of resilient substrates are arranged at spherical case outer surface to allow bending oscillations of resilient substrate. Outer ends of every of the fourth pairs of resilient substrates are rigidly secured at outer sealed ring case with amplifiers fitted therein. Said ring case is arranged outside said spherical case while hydrophone channel amplifier input and inputs of amplifiers of said three vector channels are a differential design.

EFFECT: higher sensitivity of piezoelectric components, decreased noises, lower sensitivity of combined hydro acoustic receiver.

4 dwg