METHOD OF DETECTION AND DIRECTION FINDING OF ACOUSTIC SIGNALS EMITTED BY HYDROBIONTS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC G01S15/96 

FIELD: measurement equipment.

SUBSTANCE: method of detection and direction finding of acoustic signals emitted by hydrobionts consists in: reception, amplification and filtration of acoustic emission signals by a set of acoustoelectric transducers with different directional characteristics, normalization of the received signals by each received signal power value, measurement of characteristic functions of statistical distributions of the normalized signals at outputs of each antenna, comparing of the measured characteristic of distribution functions for determination of the presence of a biological object and its direction finding. Use of characteristic functions of signals at outputs of antennas as measured parameters and their subsequent comparison fundamentally distinguishes this method from conventional antenna array signal processing based on measurement of the received signal energy. Diagram of the apparatus for implementation of this method is provided.

EFFECT: increased efficiency of detection and direction finding signals emitted by hydrobionts, determination of angular coordinates clusters of biological objects in conditions of natural and man-induced water noise for non-Gaussian signals of hydrobionts, based on measurement and comparison of characteristic functions of statistical distributions of received acoustic signals, with increased noise immunity and response.

2 cl, 4 dwg