Size identification of underwater objects from backscattering signals of arbitrary looking angles

W. Li, G. R. Liu, Xiaoming Zhang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The inverse problem of determining the size, shape and orientation of a submerged object using the scattered field data is studied. Based on the physical optics approximate, the profile function of the object is found directly proportional to its ramp response that is the second integral of the impulse response. Through analyzing the feature of the ramp response in different computed frequency ranges, it is found that the low-frequency data are essential to the shape of the underwater object while the high-frequency data are very important to the size of the object. Therefore, when employing the high-frequency data to compute the ramp response, the edge of the object can only be highlighted in the illuminated region at certain aspect. Based on this finding, a new method is developed to estimate the size of underwater objects. The present method uses different frequency ranges to determine different parameters of the underwater objects so as to achieve the best accuracy. A number of examples are presented to demonstrate the effectiveness of the present method in using the ramp response technique to identify the size of both rigid and elastic bodies.

Original languageEnglish (US)
Pages (from-to)301-317
Number of pages17
JournalJournal of Computational Acoustics
Volume12
Issue number3
DOIs
StatePublished - Sep 2004

Fingerprint

Physical optics
Backscattering
Impulse response
Inverse problems
backscattering
ramps
Angle
Arbitrary
High-frequency Data
frequency ranges
elastic bodies
physical optics
rigid structures
Physical Optics
impulses
Elastic body
Impulse Response
Object
Rigid Body
low frequencies

Keywords

  • Backscattering frequency spectrum
  • Inverse problem
  • Profile function
  • Ramp response
  • Size determination

ASJC Scopus subject areas

  • Applied Mathematics
  • Acoustics and Ultrasonics

Cite this

Size identification of underwater objects from backscattering signals of arbitrary looking angles. / Li, W.; Liu, G. R.; Zhang, Xiaoming.

In: Journal of Computational Acoustics, Vol. 12, No. 3, 09.2004, p. 301-317.

Research output: Contribution to journalArticle

@article{e795213b97174a63aac404f7897e8ab2,
title = "Size identification of underwater objects from backscattering signals of arbitrary looking angles",
abstract = "The inverse problem of determining the size, shape and orientation of a submerged object using the scattered field data is studied. Based on the physical optics approximate, the profile function of the object is found directly proportional to its ramp response that is the second integral of the impulse response. Through analyzing the feature of the ramp response in different computed frequency ranges, it is found that the low-frequency data are essential to the shape of the underwater object while the high-frequency data are very important to the size of the object. Therefore, when employing the high-frequency data to compute the ramp response, the edge of the object can only be highlighted in the illuminated region at certain aspect. Based on this finding, a new method is developed to estimate the size of underwater objects. The present method uses different frequency ranges to determine different parameters of the underwater objects so as to achieve the best accuracy. A number of examples are presented to demonstrate the effectiveness of the present method in using the ramp response technique to identify the size of both rigid and elastic bodies.",
keywords = "Backscattering frequency spectrum, Inverse problem, Profile function, Ramp response, Size determination",
author = "W. Li and Liu, {G. R.} and Xiaoming Zhang",
year = "2004",
month = "9",
doi = "10.1142/S0218396X04002298",
language = "English (US)",
volume = "12",
pages = "301--317",
journal = "Journal of Computational Acoustics",
issn = "0218-396X",
publisher = "World Scientific Publishing Co. Pte Ltd",
number = "3",

}

TY - JOUR

T1 - Size identification of underwater objects from backscattering signals of arbitrary looking angles

AU - Li, W.

AU - Liu, G. R.

AU - Zhang, Xiaoming

PY - 2004/9

Y1 - 2004/9

N2 - The inverse problem of determining the size, shape and orientation of a submerged object using the scattered field data is studied. Based on the physical optics approximate, the profile function of the object is found directly proportional to its ramp response that is the second integral of the impulse response. Through analyzing the feature of the ramp response in different computed frequency ranges, it is found that the low-frequency data are essential to the shape of the underwater object while the high-frequency data are very important to the size of the object. Therefore, when employing the high-frequency data to compute the ramp response, the edge of the object can only be highlighted in the illuminated region at certain aspect. Based on this finding, a new method is developed to estimate the size of underwater objects. The present method uses different frequency ranges to determine different parameters of the underwater objects so as to achieve the best accuracy. A number of examples are presented to demonstrate the effectiveness of the present method in using the ramp response technique to identify the size of both rigid and elastic bodies.

AB - The inverse problem of determining the size, shape and orientation of a submerged object using the scattered field data is studied. Based on the physical optics approximate, the profile function of the object is found directly proportional to its ramp response that is the second integral of the impulse response. Through analyzing the feature of the ramp response in different computed frequency ranges, it is found that the low-frequency data are essential to the shape of the underwater object while the high-frequency data are very important to the size of the object. Therefore, when employing the high-frequency data to compute the ramp response, the edge of the object can only be highlighted in the illuminated region at certain aspect. Based on this finding, a new method is developed to estimate the size of underwater objects. The present method uses different frequency ranges to determine different parameters of the underwater objects so as to achieve the best accuracy. A number of examples are presented to demonstrate the effectiveness of the present method in using the ramp response technique to identify the size of both rigid and elastic bodies.

KW - Backscattering frequency spectrum

KW - Inverse problem

KW - Profile function

KW - Ramp response

KW - Size determination

UR - http://www.scopus.com/inward/record.url?scp=5444268062&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=5444268062&partnerID=8YFLogxK

U2 - 10.1142/S0218396X04002298

DO - 10.1142/S0218396X04002298

M3 - Article

AN - SCOPUS:5444268062

VL - 12

SP - 301

EP - 317

JO - Journal of Computational Acoustics

JF - Journal of Computational Acoustics

SN - 0218-396X

IS - 3

ER -