FIELD: acoustics.
SUBSTANCE: invention relates to hydroacoustics and can be used for detection of a moving sound source, measurement of azimuth angle of source and horizon of source in shallow sea in passive mode using acoustic receivers mounted at sea bottom, coordinates and angular position of which are considered known. Hydroacoustic system comprises N acoustic composite receivers, forming two identical bottom vertically oriented equidistant antennae on M = N/2 composite receivers in each, each of which consists of a hydrophone, three-component vector receiver and amplifiers connected thereto, telemetering unit, input of which is connected to output of acoustic composite receivers, including voltage dividers, analogue-to-digital converting circuit, single electronic multiplexing circuit, modulator and optical emitter connected by optical link to optical receiver, system for collecting, processing and transmitting information, having a unit for collecting, processing and transmitting information and device for accessing digital data networks, N-channel unit for calculating vertical component of intensity vector. Unit for determining maximum vertical component of intensity vector, N-channel unit for calculating horizontal components of intensity vector, N-channel unit for calculating azimuth angle. Unit for calculating averaged azimuth angle, adder, spectrum analyser of complex envelope, computer of maximum spectrum of complex envelope. Hydroacoustic system additionally includes a subsystem for determining horizon of source with high noise immunity. Said subsystem comprises (M-1)-channel unit for differentiation horizontal components of intensity vector on vertical coordinate, (M)-channel unit for differentiation of vertical component of intensity vector on horizontal coordinates, (M-1)-channel unit for calculating horizontal component of rotor of intensity vector, (M-1)-channel unit for calculating horizontal components of rotor of intensity vector in turned coordinate system, unit for calculating maximum value of horizontal component of rotor of intensity vector in turned coordinate system, unit for determining horizon of source, and horizon source is average value between estimate of horizon of maximum of vertical component of intensity vector and estimate of horizon of location of geometrical centre of four acoustic composite receivers, which corresponds to maximum of angular component of rotor of intensity vector Hφ.
EFFECT: technical result is high noise-immunity of elementary composite receiver and whole system, as well as higher accuracy of determining level of source.
1 cl, 3 dwg
