Modeling and Experimental Verification of Echo Characteristics of 3 Dimensional Underwater Target

Seung-ki You; Sunhyo Kim; Jee Woong Choi; Donhyug Kang; Dongmin Jeong

doi:10.7776/ASK.2014.33.3.174

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2014 Vol.33, Issue 3 Preview Page Next Page

Modeling and Experimental Verification of Echo Characteristics of 3 Dimensional Underwater Target 3차원 수중 표적의 반향특성 모델링과 실험적 검증

31 May 2014. pp. 174-183

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Abstract

When a active sonar signal is transmitted and returned back from a target, it has been distorted by various properties of acoustic channel such as multipath arrivals. And signals have been appeared to be different form by target position and attitude. Therefore, we simulated the target echo signal using 3 dimensional target model include reflects target features. In this paper, we develop components form of a simulated target model is made up equally spaced highlight points, and each part of the target consists of shape function. We can simulate a target echo signal and Target strength (TS) according to wave incident angle. To verify, we made small scale target in kit form and we had got underwater target signal for comparing simulation result in water tank.

Keywords

Underwater target

3 dimensional target modeling

Target echo signal

Highlight

Lab experiment

능동소나에 의한 표적 반향 신호는 다중경로 환경에서 전파됨에 따라 신호가 변형되어 수신된다. 또한 표적의 위치와 자세각에 따라 반향 신호 특성이 다르게 나타난다. 따라서 이러한 특성을 반영할 수 있는 3차원 형상의 표적 모델을 통해 반향 특성이 모의 되어야 한다. 본 논문에서는 3차원 표적신호의 모의를 위해 표적의 각 구성부를 형상 함수화 하였으며 각 구성부의 대표 반향점을 등간격으로 선정하여 표적 모델을 개발하였다. 개발된 표적 모델을 이용하여 음의 입사각에 따른 반향 신호와 표적강도(TS : Target Strength)를 모의하였다. 모의된 표적신호의 반향 강도 및 신호 특성을 검증하기 위해 조립이 가능한 구성부별 축소 모형을 제작하여 수조에서 축소 표적을 이용한 반향 실험을 수행하였다.

키워드

수중 표적

3차원 표적신호 모델링

표적 반향 신호

하이라이트

수조 실험

References

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 33
No :3
Pages :174-183
Received Date : 2014-02-12
Revised Date : 2014-04-17
Accepted Date : 2014-04-23
DOI :https://doi.org/10.7776/ASK.2014.33.3.174

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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