FIELD: hydro acoustics.
SUBSTANCE: invention relates to hydroacoustics and can be used to detect a moving sound source, measure the azimuth angle of the source and source horizon in shallow sea in passive mode using acoustic receivers installed on the sea bottom, the coordinates of which and the angular position are considered known. To achieve this goal, a hydroacoustic complex comprising N acoustic combination receivers forming a bottom vertically oriented equidistant antenna, in which the distance between the acoustic combined receivers is equal to a predetermined error in determining the vertical coordinate (horizon) of the sound source Δz, and the number of receivers N= H/Δz (where H is the depth of the sea), each of which consists of a hydrophone, a three-component vector receiver and amplifiers connected thereto, a telemetry unit, input of which is connected to output of acoustic combined receivers, including voltage dividers, analog-to-digital converting circuit, single electronic multiplexing circuit, modulator and optical emmiter coupled by optical link to optical receiver, system for collecting, processing and transmitting information, comprising a unit for collecting, processing and transmitting information, and a device for accessing digital data networks, N-channel unit for calculating the vertical component of the intensity vector, unit for determining maximum vertical component of intensity vector, N-channel unit for calculating the horizontal components of the intensity vector, N-channel azimuth angle calculation unit, averaging azimuth angle calculation unit, adder, spectrum analyzer of complex envelope, analyzer of complex envelope maximum, an N-channel sound source detection subsystem along the horizontal power flow is additionally introduced. This makes it possible to increase the noise immunity of the measuring complex in the detection mode by 3–4 dB in comparison with the prototype. An additional increase in noise immunity up to 10 dB in comparison with the prototype is provided by the realization of the averaging procedure for isotropic interference in channels for measuring horizontal power fluxes. With increasing noise immunity of the measuring complex, its detection range also increases.
EFFECT: additional increase in noise immunity of elementary combined receiver and whole system, as well as an increase in action range.
1 cl, 3 dwg
