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Detection of an Object Bottoming at Seabed by the Reflected Signal Modeling
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 Title & Authors
Detection of an Object Bottoming at Seabed by the Reflected Signal Modeling
On, Baeksan; Kim, Sunho; Moon, Woosik; Im, Sungbin; Seo, Iksu;
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 Abstract
Detecting an object which is located at seabed is an important issue for various areas. This paper presents an approach to detection of an object that is placed at seabed in the shallow water. A conventional scheme is to employ a side-scan sonar to obtain images of a detection area and to use image processing schemes to recognize an object. Since this approach relies on high frequency signals to get clear images, its detection range becomes shorter and the processing time is getting longer. In this paper, we consider an active sonar system that is repeatedly sending a linear frequency modulated signal of 6~20 kHz in the shallow water of 100m depth. The proposed approach is to model consecutively received reflected signals and to measure their modeling error magnitudes which decide the existence of an object placed on seabed depending on relative magnitude with respect to threshold value. The feature of this approach is to only require an assumption that the seabed consists of an homogeneous sediment, and not to require a prior information on the specific properties of the sediment. We verify the proposed approach in terms of detection probability through computer simulation.
 Keywords
Active sonar;bottoming objects;shallow water;reverberation;cancellation;
 Language
Korean
 Cited by
1.
영상 소나를 이용한 수중 물체 외형 복원에 관한 기초 실험,이영준;김태진;최진우;최현택;

전자공학회논문지, 2016. vol.53. 10, pp.116-122 crossref(new window)
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