METHOD FOR AUTOMATIC CLASSIFICATION Russian patent published in 2015 - IPC G01S15/58 

FIELD: physics.

SUBSTANCE: method includes emitting a probing signal, receiving echo signals with a static beam pattern fan, digitally processing the received signal, determining noise level, calculating a threshold, determining if the selected detection threshold is exceeded consecutively on all spatial channels of the static beam pattern fan, measuring and storing the amplitude and number of readings exceeding the detection threshold, measuring distance, selecting adjacent spatial channels in which the threshold has been exceeded, determining the duration of the echo signal in said channels ΔT_i, where i is the number of the channel, in each channel i, determining the temporal position of the beginning of the envelope of the echo signal T, determining the time difference between the beginning of the measured echo signals in adjacent spatial channels T_i+1-T_i, based on the known width of the beam pattern of one spatial channel α and the measured distance Dizm, determining the tool tangential range of the echo signal using the formula K=Dizm sinα, determining heading angle of position of the object using the formula β=arctg C(T_i+1-T_i)/K, where C is the speed of sound, determining the radial length of the object via successive summation of estimates of the radial length in those successive spatial channels in which the threshold ΣΔT_i was exceeded, determining the full length of the object using the formula L_poln.=L_rad/sinβ, where L_rad=CΣΔT_i, which is compared with the threshold to carry out classification.

EFFECT: method increases the probability of correct classification.

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