Article

Article title FEATURES SONAR REFLECTION AUTONOMOUS OBJECTS MARINE MONITORING
Authors A.A. llarionov, S.V. Kozlovski, V.P. Chernov
Section SECTION I. ACOUSTICS AND HYDROACOUSTICS
Month, Year 12, 2015 @en
Index UDC 656.61.087: 623.82
DOI
Abstract The urgency of the problem of early detection of autonomous underwater vehicle (AUV) that can be represent potential underwater subversive and terrorist threats is grounded. The most probable threat is represented for the installations of marine activity ensuring development marine oil and gas fields. As means of observation over underwater robots for harbour areas mobile and stationary sonars of a safety are observed. Are analyzed tactical-technical and constructional features sample AUV "REMUS-100" and "Gavia", intended for oceanologic researches and the control of characteristics of a marine environment. The given underwater vehicles can be used as base for diversive activity. It is analysed characteristics hydrolocation reflection of underwater robots as small - size hydroacoustical objects of search with usage of the methodical approach grounded on an estimation of parameters an echo of-portraits. Results of experimental laboratory researches of characteristics hydrolocation reflections of dummy AUV analogous on design data to apparatus "Gavia" are indicated. Experimental researches are fulfilled in exploratory basin NITS REV and FIR of Navy. According to experiments at counter bow and stern angles of value of equivalent radiuses of reflection AUV do not exceed 0,15ч 0,25 m, and at on-board angles in narrow sector -1,0ч 2,0 of m. Difficulty hydrolocation detections of such installations is noted at usage of traditional methods of search small-size objects. The reason on which existing methods of suppression with a reverberative noise in active sonars of detection of the underwater swimmers, based on application of difficult wide-band signals high-resolution, at a hydrolocation of under- water robots of type «Gavia» are ineffective is explained. For observation for AUV in sonars it is offered to use a sign of existential extent of installations and route display of their traffic with application of processing methods of images, elements of the theory of a pattern recognition. It is recommended by search AUV in marine and freshwater areas to use the Russian sonars of commercial assignment "Negra-M" and the "Tral-M" having positive operating experience at guarding of domestic and foreign installations.

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Keywords Autonomous operated vehicle; characteristics hydrolocation reflexions; sonars.
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