HYDROACOUSTIC METHOD OF DISTANCE MEASUREMENTS USING EXPLOSION SIGNAL Russian patent published in 2015 - IPC G01S15/06 

FIELD: instrumentation.

SUBSTANCE: hydroacoustic method of distance measurements using the explosion source contains a explosion source of signals, echo-signal reception from the object, filtering, detection and displaying in indicator, the explosion source has fixed depth of installation and fixed time of activation T_rad, the explosion source signals are received by static fan of directional characteristics, interference level is measured along all space channels, threshold is selected, signal of direct spreading from explosion source to receiver is accepted, direction α₀ of direct spreading signal arrival is determined, time of direct spreading signal arrival T_dir is determined, distance from receiver to radiation source d = (T_dir-T_rad)C is determined, where C is sound velocity, echo-signal reflected from the object is received, direction β₀ of echo-signal reflected by the object arrival is determined, time T_es of arrival of echo-signal reflected by the object is determined, time of spreading from source to the object and to receiver t_c = (T_es-T_rad) is determined, distance of spreading from source to object and to receiver R_c = Ct_c is determined, difference of angles (α₀-β₀) between direction to source and direction to echo-signal receiver is determined, distance to target is determined as per equation: $$D=\frac{R_c^2-d^2}{2R_c-2d\cos \left({\alpha }_0-{\beta }_0\right)}.$$

EFFECT: invention ensures determination of the range of detection and security of the receiver.

2 dwg