METHOD FOR CLASSIFYING UNDERWATER OBJECT Russian patent published in 2023 - IPC G01S15/58 G01S15/46 G01S15/87 G01S3/80 

FIELD: hydroacoustics.

SUBSTANCE: method comprises emitting a probing signal by a sonar, receiving an echo signal from an object, measuring the time delay between the moment of emission and reception of the echo signal, determining distance D to the object based on the delay value and the known speed of sound propagation, and determining the immersion depth of an underwater object. Next, the angle Q° is measured, that is the direction to the underwater object in the vertical plane and the distance from the sonar to the bottom H_b is measured using the echo sounder, estimates of which are remembered during the time between the emission of the sounding signal and the reception of the echo signal. If H_b>D, then decision is made that the object is “above the bottom”. If H_b<D, then the average value of N_bavg is determined from several consecutive measurements of N_b, the calculated estimate of the depth N_bc is determined, and a decision is made that the detected underwater object is “at the bottom” for N_bc<N_bavg, and the underwater object is “above the bottom” for N_bc≥N_bavg, and the distance between the object and the bottom is determined.

EFFECT: increased probability of correct classification according to the measured parameters.

1 cl, 2 dwg