Title page for etd-0831110-150211


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URN etd-0831110-150211
Author Chen-Hung Sung
Author's Email Address soulman0520@hotmail.com
Statistics This thesis had been viewed 5338 times. Download 452 times.
Department IAMPUT
Year 2010
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title The Study of Synthetic Aperture Sonar System
Date of Defense 2010-08-26
Page Count 77
Keyword
  • target detection
  • image reconstruction
  • synthetic aperture sonar
  • Abstract This research is to study the fundamental theory of Synthetic Aperture Sonar (SAS) through numerical simulation and experimental analysis. The basic principle of SAS is to enhance the capability of spatial resolution by moving the transducer element to increase aperture so that it achieves a better resolution. The factors affecting the capability of resolution include the actual size of the transducers, frequency and its bandwidth, pulse length, and moving speeds. The effects of various factors on the resolution were examined through numerical simulation. The results have shown that the smaller the true size of the transducer, the better the resolution. Moreover, when the bandwidth is increased, the resolution also increases. The SAS is sensitive to the speed of movement due to the fact that data acquisition may be limited, therefore the speed can not be too high, e.g., less than 1.5 m/s. The experiment was carried out in a water tank of size 4 m x 3.5 m x 2 m. The transducers of AST MK VI 192 kHz were employed to transmit and receive signals. Copper spheres of various sizes (3 cm, 6 cm, 8 cm diameter) were used as targets. The data were obtained and analyzed, and the results have shown that the resolution may be achieved by SAS analysis, establishing the fundamental principle and offering opportunity for future study.
    Advisory Committee
  • Shun-Hsiung Chang - chair
  • Chau-Chang Wang - co-chair
  • Chen-Fen Huang - co-chair
  • Jin-Yuan Liu - advisor
  • Files
  • etd-0831110-150211.pdf
  • indicate accessible in a year
    Date of Submission 2010-08-31

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