A Study on the Acoustic Scattering of Submerged Scale Target - Experiment and Analysis

J. Ocean Eng. Technol. 1998;12(4):92-100.

Kee-Cheol Shin;Jea-Soo Kim;Woo-Shik Kim;Won-Ho Kim;Yong-Yeon Kim;

수중 축소표적의 음향산란에 관한 연구 - 실험과분석

신기철;김재수;김우식;김원호;김용연;

한국해양대학교 조선해양공학부;국방과학연구소;삼성항공 정밀기기연구소;

Keywords: acoustic scattering, Scale target, specular reflection, reradiation, matched filter, Impulse response,

핵심용어: 음향산란, 축소표적, 경면발사, 재방사, 정합필터, 충격응답,

Abstract

"The target detection, classification and motion analysis by active sonar system requires the detailed characteristics of scattered echoes in the near field. Because of the inherently complex scattering mechanism, experimental methods are widely used to understand the process of scattered echo formation. In this paper, the experimental approach and the data processing techniques are applied to the analysis of scattering mechanism. For this purpose, the scale target experiment in acoustic water tank is designed and the data obtained in the experiment are analyzed to characterize the echoes. in time and frequency domain. Especially, the analysis is focused on the identification of location and directivity of each HL points for parameterization of HL. In the geometric optics region, acoustic scattering is dominated by the specular reflection due to the shapes of target, and re-radiation is also important in certain aspect angle of the target."