• Title/Summary/Keyword: Side Scan Sonar

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A Study on The Image Expression of Side Scan Sonar (Side Scan Sonar 영상표현에 관한 연구)

  • Jang, Won-Sil;Yoon, Ki-Han;Kim, Young-Il
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2005.11a
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    • pp.152-153
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    • 2005
  • Side scan sonar System occupies an important position as one of marine survey equipments. The purpose of this research is to express sonar' scan images in underwater and compare with the measured size, shape and the quality of the material. Also we confirm the effectiveness of obtained images using the Side scan sonar.

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Study to Design of Side-scan Sonar for Unmanned Surface Vehicle (무인수상정 탑재 측면주사소나 설계를 위한 모델링 연구)

  • Bae, Ho Seuk;Kim, Woo-Shik;Kim, Jung Hoon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.21 no.1
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    • pp.40-46
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    • 2018
  • In order to successfully detect and identify underwater targets located on the seabed, unmanned surface vehicles (USVs) typically acquire acoustic signals with a side-scan sonar device and reconstruct information about the target from the processed images. As the quality of the side-scan sonar images acquired by USVs depends on the environment and operating parameters, using modeling and simulation techniques to design side-scan sonar devices can help optimize the reconstruction of the sonar images. In this work, we study a side-scan sonar design for use in USVs, that takes the movement of the platform into account. First, we constructed a simulated seabed environment with underwater targets, and specified the maneuvering conditions and sonar systems. We then generated the acoustic signals from the simulated environment using the sonar equation. Finally, we successfully imaged the simulated seabed environment using simple signal processing. Our results can be used to derive USV side-scan sonar design parameters, predict the resulting sonar images in various conditions, and as a basis for determining the optimal sonar parameters of the system.

Digital Image Processing of Side Scan Sonar for Underwater Man-made Structure (수중 인공구조물에 대한 사이드스캔소나 탐사자료의 영상처리)

  • Shin, Sung-Ryul;Lim, Min-Hyuk;Kim, Kwang-Eun
    • Journal of Advanced Marine Engineering and Technology
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    • v.33 no.2
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    • pp.344-354
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    • 2009
  • Side scan sonar using acoustic wave plays a very important role in the underwater, sea floor, and shallow marine geologic survey. In this study, we have acquired side scan sonar data for the underwater man-made structures, artificial reefs and fishing grounds, installed and distributed in the survey area. We applied digital image processing techniques to side scan sonar data in order to improve and enhance an image quality. We carried out digital image processing with various kinds of filtering in spatial domain and frequency domain. We tested filtering parameters such as kernel size, differential operator, and statistical value. We could easily estimate the conditions, distribution and environment of artificial structures through the interpretation of side scan sonar.

Depth-based Correction of Side Scan Sonal Image Data and Segmentation for Seafloor Classification (수심을 고려한 사이드 스캔 소나 자료의 보정 및 해저면 분류를 위한 영상분할)

  • 서상일;김학일;이광훈;김대철
    • Korean Journal of Remote Sensing
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    • v.13 no.2
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    • pp.133-150
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    • 1997
  • The purpose of this paper is to develop an algorithm of classification and interpretation of seafloor based on side scan sonar data. The algorithm consists of mosaicking of sonar data using navigation data, correction and compensation of the acouctic amplitude data considering the charateristics of the side scan sonar system, and segmentation of the seafloor using digital image processing techniques. The correction and compensation process is essential because there is usually difference in acoustic amplitudes from the same distance of the port-side and the starboard-side and the amplitudes become attenuated as the distance is increasing. In this paper, proposed is an algorithm of compensating the side scan sonar data, and its result is compared with the mosaicking result without any compensation. The algorithm considers the amplitude characteristics according to the tow-fish's depth as well as the attenuation trend of the side scan sonar along the beam positions. This paper also proposes an image segmentation algorithm based on the texture, where the criterion is the maximum occurence related with gray level. The preliminary experiment has been carried out with the side scan sonar data and its result is demonstrated.

Management after installation of artificial reefs;Present Condition and Development Scheme (인공어초 사후관리 현황과 발전방향)

  • Lee, Sung-Il;Ahn, Seung-Hwan;Kim, Dong-Sun
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2005.11a
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    • pp.160-161
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    • 2005
  • It is important to manage artificial fish reefs with installation for restoration. The instruments of survey for artificial reefs condition(location, amount etc.) is Side Scan Sonar and Multi-beam sonar. The efficient and economic survey of the artificial reefs facility is the complete survey of the SSS(Side Scan Sonar) in all area first and then the survey of the artificial reefs by MBES(Multi Beam Echo Sounder) in the finding area.

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Practical theory and ocean survey application of side scan sonar (Side Scan Sonar 실무이론과 현장조사에 적용)

  • Kim, Seong-Ryul;Lee, Yong-Kuk;Jung, Baek-Hun
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2006.06a
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    • pp.201-204
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    • 2006
  • In the side scan sonar method, use is made of the back-scattering, at low grazing angles of incidence to the seabed, of relatively high-frequency acoustic waves radiated in a fan-shaped beam from a transducer contained in a towed body. The fan beam is oriented so that the wider angle is in the vertical plane (scan range) and the narrower angle in the horizontal plane (beam width) with the axis of the beam normal to the ship track. The display of the returns is usually realized as a series of closely spaced intensity-modulated lines on a paper recorder or computer screen display. In this way a two-dimensional picture of the seabed is build up.

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Research on Development of Side Scan Sonar using multi-beam Sensors (멀티빔 센서를 이용한 사이드 스캔 소나 개발에 관한 연구)

  • 장유신;계중읍;구융서;박승수;김지한;이만형
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.696-699
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    • 2004
  • A side scan sonar system uses the towfish installed sonars, It is an equipment that search images of the bottom surface of the sea in real time. It is a typical equipment that is related to a sea investigation such as a geological survey, seabed communication cable and power line cable placing repair investigation, fish breeding ground investigation, sea purification, relic and mineral investigation, and mine and submarine search. It used to fined objects and investigate on the seabed surface. But, recently, it is used to sea purification and geological survey that require information of the correct surface of the seabed. So, it needs various filtering technique and image processing techniques development to acquire high resolution image. therefore, this research develops a side scan sonar using multi-beam sensors that supply various information with the fast scan speed and correct high resolution that is not a simple underwater investigation equipment.

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Development of the Side Scan Sonar Using the Multi-beam Sensors : Sensor Design (멀티빔 센서를 이용한 사이드 스캔 소나 개발 : 센서 설계)

  • Chang, Yu-Shin;Keh, Joong-Eup;Jo, Heung-Gi;Lee, Man-Hyung
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.54 no.10
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    • pp.581-586
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    • 2005
  • The multi-beam side scan sonar system uses the towfish installed sonars, it is an equipment that search images of the bottom surface of the sea in real time. It is a typical equipment that is related to a sea investigation such as a geological survey, seabed communication cable and power line cable placing repair investigation, fish breeding ground investigation, sea purification, relic and mineral investigation, and mine and submarine search. Recently, it is used to sea purification and geological survey that require information of the correct surface of the seabed. Therefore, this research develops multi-beam sensors for a side scan sonar that supply various information with the fast scan speed and correct high resolution that is not a simple underwater investigation equipment.

Study on Development of Side Scan Sonar Using Multi-beam Sensors (다중 빔 센서를 이용한 측면주사음탐기에 관한 연구)

  • Chang, Y.S.;Keh, J.E.;Park, S.S.;Lee, M.H.
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2006.06a
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    • pp.317-318
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    • 2006
  • The towfish oi a side scan sonar is an equipment that search images of the bottom surface of the sea in real time. It is a typical equipment that is related to a sea investigation such as a geological survey, seabed communication cable and power line cable placing repair investigation, fish breeding ground investigation, sea purification, relic and mineral investigation, and mine and submarine search. It used to find objects and Investigate on the seabed surface. But, recently, it is used to sea purification and geological survey that require information of the correct surface of the seabed. So, it needs various filtering technique and image processing techniques development to acquire high resolution image. Therefore, this research develops a side scan sonar using multi-beam sensors that supply various information with the fast scan speed and correct high resolution that is not a simple underwater investigation equipment.

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Submarine Terrain Exploration for the Coast Using Side Scan Sonar (측면주사음탐기를 이용한 연안지역 해저지형탐사)

  • 이종출;문두열;김대현;서동주
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2004.11a
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    • pp.539-544
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    • 2004
  • In this study, locational information data acquisited by using the side scan sonar which is more precise than traditional submarine terrain' survey equipment. And the result of exploration through the object area(the East sea), accurate submarine terrain could be deciphered by sounded image. Also, in the future, side scan sonar's application will be maximized for the submarine terrain's sediment investigation to design or construction of ocean facilities.

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