HYDRO ACOUSTIC METHOD FOR DETERMINING PURPOSE PARAMETERS WHEN USING AN EXPLOSIVE SIGNAL WITH A WIRELESS COMMUNICATION SYSTEM Russian patent published in 2019 - IPC G01S15/00 

FIELD: hydro acoustics.

SUBSTANCE: invention relates to the field of hydro acoustics and can be used to build systems for detecting an echo signal from an object, measuring the parameters of a detected object and classifying it when using explosive signals. Method contains the radiation of an explosive signal at a fixed time T_rad, reception of signals from an explosive source is carried out by a static fan of directional characteristics, receive a direct propagation signal from the source of the blasting signal to the reception point, receive an echo signal reflected from the object, determine the direct signal spectrum, select a frequency range from the direct signal spectrum by the band F_hz, determine the average frequency of the band F_av, form a reference frequency bank in the range of the possible speed of the object, determine the spectra of the echo signals in successive time intervals, conduct mutually correlation processing of consecutive time spectra and spectra from the output of the reference frequency bank, from the resulting array of mutually correlation functions determine the average value of their emissions and the root-mean-square deviation of the amplitudes of these emissions, choose the threshold value using formula A_hold=2(A_av+A_rms), where A_av is an estimation of the average amplitude of the emissions of the correlation function, A_rms is an estimate of the root-mean-square deviation of the emission amplitude, choose the emission of the correlation function with a maximum amplitude A_max and compared to A_hold, if A_max>2A_hold, decide that an echo signal from the target takes place, determine T_es – temporary position A_max the correlation function, the reference channel number determines the frequency of the reference channel F_es, if F_es>F_av, then the object is moving and approaching if F_es<F_av, then the object is movable and is removed if F_es=F_av, then the object is fixed.

EFFECT: technical result when using the proposed method is to determine the speed of movement of the detected object, measure the classification criteria and determining the class of the detected object.

1 cl, 1 dwg