FIELD: hydro acoustics.
SUBSTANCE: invention relates to the field of hydroacoustics and can be used for development of classification systems, determination of coordinates and parameters of motion of noisy objects in the sea in the infrasonic range of frequencies. Method of classification, determination of coordinates and parameters of motion of noisy objects in sea includes reception of noise emission signals by hydroacoustic combined receiver, spectral analysis of received signals, determination of mutual and autospectrums for 16 information parameters, which make a complete description of the sound field using scalar, vector and tensor values, plotting a sonogram of the sound field at the output of the comparator, selecting in the current set of mutual and autospectrum an informative parameter to which the maximum signal-to-interference ratio corresponds, determining at sonogram first vane and the first rotary shaft Valenod frequency-blade scale, determining the number of revolutions of the shaft and propeller blades, determining a calibration coefficient M=(v/N1K)kn, where v is speed of known object, N4, K is rpm on shaft and number of blades of screw of known object, determination of speed of noisy object by formula v=MN1K, where N1, K is the number of revolutions per minute on the shaft and the number of blade blades of the noisy object, determining by the sonogram the invariant of the interference structure, and if the invariant takes negative values, the noisy object is classified as an underwater object, determining bearing on a noisy object using horizontal components of an intensity vector, determining distance to a noisy object using an invariant, object speed and information on the angular position of the trajectory of the noisy object relative to the combined receiver.
EFFECT: technical result consists in increase in noise-immunity of receiving hydroacoustic antenna in the presence of near navigation noise, in increasing probability of correct classification and reduction of error in determining coordinates and parameters of motion of noisy objects in sea in passive mode.
1 cl, 3 dwg
