Broadband hydroacoustic antenna system Ecological monitoring of water environment and natural sedimentary rocks
Abstract
Broadband hydroacoustic antenna system Ecological monitoring of water environment and natural sedimentary rocks
Incoming article date: 25.12.2015This 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