Seafloor classification for mine countermeasures operations using synthetic aperture sonar images

Köhntopp, Daniel; Lehmann, Benjamin; Kraus, Dieter; Birk, Andreas

doi:10.1109/oceanse.2017.8084752

Cited by 6 publications

(1 citation statement)

References 8 publications

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“…Among these, underwater SONAR has become prominent in the contemporary use of such arrays, providing surveillance for maritime safety and security against threats such as sea mines [ 4 , 5 , 6 , 7 , 8 ]. Many recent studies are dedicated to naval mine detection, mine-like object classification, and mine countermeasures [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Versatile Approach for Underwater Conformal Volumetric Array Design

Yusuf

Pyo

Roh

2021

Sensors

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In this study, we present a novel approach to the design of a conformal volumetric array composed of M × N convex subarrays in two orthogonal curvilinear directions for underwater acoustic imaging for mine detection. Our design targets require that the proposed array transducer has three-dimensional half-power beamwidths of 85° and 25° in either of its convex subarray parts, while also reaching a peak transmitting voltage response above 147 dB. The radiated sound pressure of the subarrays was independently derived as a function of their geometrical parameters. The resulting directional factors were then combined to analyze the beam profile of the entire array. The design was finally optimized to minimize the ripple level. To validate this theoretical design, the structure was modeled and analyzed using the finite element method. The comparison between the resulting beam pattern from the finite element analysis and the analytical computation showed an excellent compliance. The method advanced is a simple and systematic analytical model to facilitate the development of new conformal volumetric arrays for underwater mine detection.

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