METHOD OF DETERMINATION OF ICEBERG LOWEST POINT IMMERSION DEPTH Russian patent published in 2016 - IPC G01S15/60 

FIELD: acoustics.

SUBSTANCE: invention relates to hydroacoustics and can be used for development of hydroacoustic equipment providing navigation safety when operating in conditions of location of icebergs. Method of determining depth of immersion bottom point of iceberg includes radiation of the probing signal at depth H, receiving an echo signal, filtering, detection and output on display, receiving an echo signal is carried out at depth H static fan of directivity characteristics in vertical plane, each of the characteristics of which has a width of the solution in vertical α< 2°, the level of isotropic interference threshold is determined, time Τ_I exceeding the echo signal selected threshold in each spatial channel along the vertical line, defined number of spatial channel N_i, duration of the echo signal in each channel Δt_i is defined, the channels, in which was successive detection of echo signals at the same time by the rule N_i € T=T_I+Δt_i, where Τ_I is time of echo signal detection in i spatial vertical channel, Δt_i is duration of the measured signal at the moment of T_I in N_i spatial channel, k is coefficient determined by the results of measuring iceberg acoustic parameters in the area of measurement, selected is the extreme lower spatial channel of a continuous sequence of channels, in which was detection of echo signals, detection time in this channel T_max is determined, angle of tilt corresponding to said spatial channel β_max is determined, sound velocity section is measured, sound field structure is calculated for the measured propagation time T_max, angle of tilt β_max and position depth of antenna H, selected beam path, time of propagation of which is equal to the measured time T_max, beam position depth H_a is determined and a decision is made on belonging of the obtained evaluation depth H_a maximum depth of submersion of iceberg.

EFFECT: technical result is automatic determination of iceberg underwater part submersion depth in any hydroacoustic operating conditions.

1 cl, 1 dwg