Bottom sediments (UP to) are media in which both longitudinal and shear acoustic vibrations can be present. The presence of several velocity components in bottom sediments makes it possible to excite various types of waves, both longitudinal and shear. In this paper, methods of excitation, generation and reception of difference frequency shear waves (RF) created by parametric systems in (DO) in location modes are analyzed. The analysis of their work in the DO is presented, and their comparative characteristics are given in comparison with the excitation, formation and propagation of the field of longitudinal RFCs in the DO. Prerequisites are given for the creation of a parametric profiler working using the method of excitation, generation and location of shear waves in a complex multiphase medium ""water-DO"". A block diagram is presented and the principle of operation of a parametric profiler on shear waves is described. The advantages and disadvantages of this method of location are shown. The conclusion is made about the possibility of creating and ration.

Keywords: parametric antenna, bottom sediments, shear waves, difference frequency waves, parametric profilogaf

The search and determination of the amount of biological resources is an urgent task, both from the point of view of food security of the Russian Federation and from the point of view of ecology. Most of the biological resources in the ocean are concentrated in shallow water zones (at depths from 1 to 200 m). The paper presents the results of the development of a parametric traverse survey sonar for searching for biological resources in shallow water. The calculation of the energy range of the parametric traverse sonar is given. The full-scale sea tests of the developed model of the traverse survey sonar in the Taganrog Bay of the Sea of Azov (shallow water conditions) are given. The average depth of the landfill was 2.2 meters. The oscillogram of the echogram recording line when determining the maximum detection range of a target in shallow water (reflected signal from a target at a distance of 1100 m) and an echogram from a target that moves away from the traverse sonar antenna at a distance of up to 800 m are given. Conclusions are drawn about the prospects of using parametric traverse-view sonars to search for fish aggregations in shallow water.

Keywords: traverse survey, parametric sonar, search for biological resources, shallow water, energy range

Hydroacoustic parametric monitoring and communication systems are considered. Brief description developed at the Department electrohydroacoustical and medical technology, Institute of nanotechnologies, electronics and instrumentation, southern Federal University (Agaimt INAP SFU) is the most promising sonar systems with parametric emitting antenna. Presented appearance and radiation pattern (days) of various embodiments of converters pumping parametricheskikh antennas of small-sized profiling. The design of composite Converter and parametric pumping days seysmoprofilografa. The description of the parametric side-view sonar and traverse-view sonar is given. In addition, parametric systems of hydroacoustic communication and monitoring of the sea on long routes are considered.

Keywords: hydroacoustic parametric system, parametric antenna, data transmission system, broadband antenna, water area monitoring, parametric profilograph. parametric navigation system, traversy overview

This paper discusses the features of the construction of broadband sonar antennas, intended for environmental monitoring of the aquatic environment, and bottom sediment. The aim of this work is the research and development of broadband antennas sonar systems for environmental monitoring of water environment and the bottom sediment. The goal is achieved by solving two problems: - the application of broadband by its nature, parametric radiating antenna, the principle of which is based on nonlinear interaction of pump waves in the propagation medium; - the application of different frequency transducers to produce the desired band frequency characteristics. The results of studies of broadband antennas illustrate the possibility of constructing broadband signals. The characteristics of broadband parametric sonar antennas, whose operation is based on using the effect of nonlinear interaction of acoustic waves. The results of experimental research of amplitude-frequency characteristics of the broadband parametric antennas. Special attention is paid to the possibility of building broadband hydroacoustic antenna consisting of different frequency converters, mechanical related field. For example, calculations of impedance characteristics of such antennas. Calculated frequency dependence of the active component of the impedance of the antenna and the directivity. In conclusion, the conclusion that the use of different frequency converters allows not only to solve the problem of constructing a broadband antenna systems transmit information to underwater vehicles, but also to provide approximately the same antenna directivity in a wide frequency range. Presents images of the bottom and benthic structures, obtained by using models of parametric profilograph and ultra-wideband sonar.

Keywords: broadband signal; ultra broadband signal; hydroacoustic monitoring; information transfer; parametric hydroacoustic antenna; different frequency converters

  This paper discusses the problem of controlling the characteristics of sonar multibeam receiver antennas. Hydro acoustic means, such as side-scan sonar, profiler, sonar, multibeam sonar, are used extensively for remote determination of the parameters of media for environmental management. In the article the technique of controlling the phase-frequency characteristics of the receiving antennas multibeam echoes sounders. The study method allows the measurement of the phase-frequency characteristics of antennas in a hydro acoustic tank which size is less than length of a near field of the reception aerial.

Keywords: Conservancy, multibeam echo-sounder, seabed research, underwater acoustic