METHOD OF DETECTING AND DETERMINING DISTANCE USING AN EXPLOSIVE SIGNAL IN A HYDROACOUSTIC LOCAL NETWORK COMMUNICATION SYSTEM Russian patent published in 2019 - IPC G01S15/06 

FIELD: hydro acoustics.

SUBSTANCE: invention relates to hydroacoustics and can be used to construct systems for detecting an echo signal from an object, measuring parameters of a detected object and classifying it using explosive signals in a hydroacoustic local network communication system. Distance measurement method comprises emitting an explosive signal with an explosive signal source, receiving an echo signal from the object by the main detector, filtering the echo signal, detecting, integrating, threshold analysis, determining distance D by formula , outputting information to an indicator, explosive source is made reusable, installed in self-contained housing with independent receiving and radiation equipment, at known time T_kn emitting a coded communication signal by the main detector, receiving an encoded communication signal by the explosive source equipment, decoding the received communication signal with a frequency filter sequence, emitting a short-duration response tone from the blasting source, which confirms the release of the source of the explosive signal, determines the time of reception of the explosive signal of direct propagation T_dir main detector, measuring sound velocity C_s, determining direction to source of explosion signal α₀, determining time of explosive signal emission by formula T_rad.es = T_kn + (T_kn – T_dir)/2, receiving the blast source echo signals reflected from the object and determining the reception time of the echo signal T_echo, determining time T_p._e propagation of explosive signal T_p._e = (T_echo – T_rad.es), determining R_c propagation distance from the blasting source to the reflector and to the main detector R_c = T_pe C_s, determining direction to echo signal from object β₀, then determining distance to detected object.

EFFECT: explosive sources, having high power and good resolution, make it possible to provide illumination of underwater situation at the right time and in the right place.

3 cl, 1 dwg