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Mìkrosistemi, Elektronìka ta Akustika
Article . 2018 . Peer-reviewed
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Mìkrosistemi, Elektronìka ta Akustika
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Determination of the Primary Classification Characteristics of Monochromatic Sound Source in Shallow Sea

Authors: Oleksander S. Chaika; Mykhailo O. Yaroshenko; Oleksii Volodymyrovych Korzhyk;

Determination of the Primary Classification Characteristics of Monochromatic Sound Source in Shallow Sea

Abstract

The work is devoted to the problems of determining the primary classification characteristics of a controlled autonomous underwater technical means, as well as searching for and clarifying the features that make it possible to determine the position of the indicated object in the shallow sea by the stationary signal system adopted.Based on the model of shallow sea, given by the classical flat regular waveguide with combined boundaries (the bottom is presented as an acoustically hard border, and the surface is served as an acoustically soft border), special points of the vector field of the intensity of the sound signal are considered. This signal is created by a monochromatic point source, which moves evenly and straightforwardly, and is fixed by a stationary reception system, which can contain one or more receivers of a certain physical nature.Connection of the type and location of special points of the field and the deviation characteristics of the signal recorded by the combined receivers is established.It is established that the constancy of the vector distribution of the intensity field and the positioning of the corresponding singular points in the waveguide sections is maintained at the change of the source horizon in certain limits of the depth of the waveguide when deduced from the bottom and when deduced from the surface.The results of calculations of the vector field of intensity and deviation characteristics of the received signal corresponding to a certain set of such initial conditions as the depth of the sea, the frequency of the carrier wave of the source (from the region of the boundary frequencies of the waveguide) are given. In this case, the correspondence of such parameters of the received signal as the sign, the magnitude and periodicity of the deviations of the wave-carrier frequency is established by a certain distribution of the vector intensity field. An unequivocal connection is also established between the results of the analysis of the deviation characteristics and the horizons of the location of the sound source (which corresponds to the primary classification criteria of the source).An example of the implementation of the inserted classification features for the application of two pressure receptors located in the bottom area on defined horizons is provided and the frequency deviation registration is provided. This allows you to not record the value of the intensity field. In this case, the general regularity of their work is revealed and described in detail.Ref. 10, fig. 11.

Работа посвящена проблеме первичной классификации автономных подвижных технических средств исследования моря. На основе классической модели мелкого моря, представленного плоским волноводом с комбинированными границами, рассмотрены особые точки векторного поля интенсивности звукового сигнала, создаваемого монохроматическим точечным источником, и установлены зависимости позиционирования источников звука от изменения фазы принятого сигнала.Приведены результаты расчетов векторного поля интенсивности и девиационных характеристик принимаемого сигнала, соответствующие определенной совокупности исходных условий. Установлено соответствие таких параметров принимаемого сигнала: знак, величина и периодичность проявлений девиации частоты несущей определенным распределением векторного поля интенсивности и установлено однозначную связь результатов анализа девиационных характеристик и горизонтов размещения источника звука, что соответствует первичным классификационным признакам источника.Библ. 10, рис. 11.

Робота присвячена проблемі первинної класифікації автономних рухомих технічних засобів дослідження моря. На основі класичної моделі мілкого моря, поданого плоским хвилеводом з комбінованими границями, розглянуто особливі точки векторного поля інтенсивності звукового сигналу, який створюється монохроматичним точковим джерелом та встановлено залежності позиціонування джерел звуку від змінення фази прийнятого сигналу.Наведено результати розрахунків векторного поля інтенсивності та девіаційних характеристик прийнятого сигналу, що відповідають певній сукупності вихідних умов. При цьому встановлена відповідність таких параметрів прийнятого сигналу як знак, величина і періодичність проявів девіації частоти хвилі-носія – певним розподіленням векторного поля інтенсивності та встановлено однозначний зв’язок результатів аналізу девіаційних характеристик і горизонтів розміщення джерела звуку (що і відповідає первинним класифікаційним ознакам джерела).Бібл. 10, рис. 11.

Keywords

intensity; singular point; pressure; vibration speed; shallow sea; deviation; frequency, 534.2, інтенсивність; сингулярна точка; тиск; коливальна швидкість; мілке море; девіація;, частота, Acoustics, Акустика, интенсивность; сингулярная точка; давление; колебательная скорость; мелкое море; девиация; частота

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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