FIELD: hydro acoustics.
SUBSTANCE: invention relates to hydroacoustics and can be used to monitor underwater environment around protected objects, for example drilling platforms, hydraulic structures, as well as for detection and tracking of underwater objects, intrusion into protected water area. Hydroacoustic control station of the underwater environment includes a receiving-emitting antenna, a generator, a switch through which the switch is connected to the receiving-radiating antenna, a surface processing and visualization unit and an underwater cable. Generator together with receiving-radiating antenna are arranged in single underwater module, which includes unit of analogue-to-digital converters connected to switch, control unit connected to unit of analogue-to-digital converters, and an interface unit connected between the output of the control unit and the surface processing and visualization unit through the submarine cable. Hydroacoustic station includes additionally: coastal processing and visualization station, connected by radio channel with providing vessel and underwater cable with bottom extended antenna, bottom extended receiving antenna, made by M receiving modules of equidistant, vertically oriented antenna, in which distance between receiving modules is equal to given error of determining vertical coordinate (horizon) of noise signal source Δz, number of receivers M=H/Δz (H-depth of sea at antenna installation point), and receiving modules are equipped with acoustic combined receivers and angular position sensors. Surface processing and visualization unit is located on providing ship. In coastal processing and visualization station includes subsystem of detection, direction finding and determination of noise signal source horizon, containing 4M-channel unit of analog-to-digital converters, 4M-channel spectrum analyzer, M-channel unit for calculating a complete set of information parameters for the overall signal plus interference (S+N) process, an M-channel unit for calculating a complete set of information parameters for interference N, M-channel unit for calculating a signal-to-interference ratio (S/N) for a complete set of information parameters, a comparator, a threshold type detector, an M-channel unit for calculating bearing to a noise signal source, M-channel bearing calculating unit to receiving-emitting antenna, noise signal source horizon calculation unit, as well as processing and visualization of the M-channel signal correlation processing unit and the unit for calculating coordinates and parameters of the target movement, which are located in the shore station.
EFFECT: reduced error in determining coordinates of a noise source (target) and high stealthiness of operations.
1 cl, 2 dwg
