HYDROACOUSTIC RECEIVER FOR GEOPHYSICAL SEISMIC RECORDS Russian patent published in 2020 - IPC H04R1/44 G01V1/38 

FIELD: hydroacoustics.

SUBSTANCE: invention relates to piezoelectric sound receivers of geophysical earthquakes designed to record and measure acoustic field in water used in geophysics for hydrocarbon search. Disclosed is a hydroacoustic receiver, in which a sensitive element is made of at least one cylindrical piezoelectric element, the inner surface of which is air-tightly screened, and a polymer tube which also contains electric terminals is mounted on the outer surface with interference. In the disclosed receiver, sealing of the inner surface of the sensitive element is made by means of a rigid tube coaxially installed in its inner cavity and end sleeves, end bushings are made in the form of hollow truncated cones, having cylindrical sections on the ends, polymer tube end parts protruding beyond ends of the sensitive element, are hermetically glued along inner surface with external surface of cylindrical sections of end bushings, and internal cylindrical surface of end bushings is tightly connected to external surface of hollow rigid tube, wherein between the inner surface of the sensitive element and the conical surface of the end sleeves there is a gap, the size of which is determined by the value of the limiting hydrostatic pressure, wherein the inner cylindrical surface of each end bushing at the end is provided with a cylindrical projection, the inner diameter of which is equal to the inner diameter of the rigid tube, and the ends of the rigid tube in the stop are connected to the inner ends of these cylindrical projections.

EFFECT: this allows to increase sensitivity of the claimed receiver, technological effectiveness of its manufacturing and embedding into the seismic cables.

3 cl, 1 dwg