한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
권호 표지
DOI QR코드

DOI QR Code

수중음향 영상화를 위한 렌즈 제작 및 특성 평가

Characteristics Evaluation of the Lens for Underwater Acoustic Imaging

  • 투고 : 2016.07.07
  • 심사 : 2016.08.22
  • 발행 : 2016.11.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A series of process to design an acoustic lens for underwater imaging is reviewed and the method to evaluate characteristics of the lens is investigated. If the target specification of lens is given, the design process consists of the material selection, evaluation of its properties, lens geometry design, prediction of lens characteristics, manufacturing, and evaluation by measurement. In this study, an actual acoustical lens is made by cutting polymethylpentene block. The characteristics of lens are predicted by the hybrid method, combination of ray tracing and Rayleigh integral. For the direct comparison between the prediction and measurement results, a simulation method based on the equivalent source method is suggested to reflect the actual radiation pattern of transducer used for measurements. Finally, the measurement is conducted in a small water tank to observe the actual characteristics of the manufactured lens.

키워드

참고문헌

  1. Tsukioka, S., Aoki, T., Ochi, H., Shimura, T., Sawa, T., Nakamura, T. et al., 2002, Development of an Acoustic Lens for an Imaging Sonar for Autonomous Underwater Vehicle “Urashima” and Experimentation in a Water Tank, Japanese Journal of Applied Physics, Vol. 41, No. 6A, pp. 3970~3973. https://doi.org/10.1143/JJAP.41.3970
  2. Belcher, E., Gallagher, D., Barone, J. and Honaker, R., 2003, Acoustic Lens Camera and Underwater Display Combined to Provide Efficient and Effective Hull and Berth Inspections, Proceedings of Oceans '03 Conference, pp. 1361~1367.
  3. Nakamura, T., Sato, Y., Kamakura, T. and Anada, T., 2004, Sound Pressure Fields Focused Using Biconcave Acoustic Lens for Normal Incidence, Japanese Journal of Applied Physics, Vol. 43, No. 5B, pp. 3163~3168. https://doi.org/10.1143/JJAP.43.3163
  4. Scroggins, D., Kamgar-Parsi, B., Folds, D. and Belcher, E., 1993, 3-D Acoustic Imaging with a Thin Lens, Proceedings of Oceans '93 Conference, pp. 444~449.
  5. Fink, K., 1994, Computer Simulation of Pressure Fields Generated by Acoustic Lens Beamformers, MS thesis, University of Washington.
  6. Mori, K., Nakamura, T., Yokoyama, T. and Hasegawa, A., 2005, 3-D FDTD Analysis of Sound Field Focused by Biconcave Acoustic Lens for Normal Incidence, Japanese Journal of Applied Physsics, Vol. 44, No. 6B, pp. 4696~4701. https://doi.org/10.1143/JJAP.44.4696
  7. Sato, Y., Mizutani, K., Wakatsuki, N. and Nakamura, T., 2009, Design for Aplanatic Fresnel Acoustic Lens for Underwater Imaging, Japanese Journal of Applied Physics, Vol. 48, No. 7, 07GL04. https://doi.org/10.1143/JJAP.48.07GL04
  8. Mori, K., Ogasawara, H., Nakamura, T., Tsuchiya, T. and Endoh, N., 2011, Design and Convergence Performance Analysis of Aspherical Acoustic Lens Applied to Ambient Noise Imaging in Actual Ocean Experiment, Japanese Journal of Applied Physics, Vol. 50, 07HG09.
  9. Joo, Y.-S., Park, C.-G., Lee, J.-H., Kim, J.-B., and Lim, S.-H., 2011, Development of Iltrasonic Waveguide Sensor for Under-sodium Inspection in a Sodium-cooled Fast Reactor, NTD&E International, Vol. 44, No. 2, pp. 239~246.
  10. Joo, Y.-S., Bae, J.-H., Kim, J.-B. and Kim, J.-Y., 2013, Effects of Beryllium Coating Layer on Performance of the Ultrasonic Waveguide Sensor, Ultrasonics, Vol. 53, No. 2, pp. 387~395. https://doi.org/10.1016/j.ultras.2012.07.005
  11. Kinsler, L., Frey, A., Coppens, A. and Sanders, J., 2000, Fundamental of Acoustics, 4th edition, John Wiley and Sons Inc.
  12. Birks, A. and Green, R., 1991, Nondestructive Testing Handbook Volume 7 - Ultrasonic Testing, American Society for Nondestructive Testing.
  13. Belcher, E., Matsuyama, B. and Timbre, G., 2001, Object Identification with Acoustic Lenses, Proceedings of Oceans 2001 Conference, pp. 6~11.
  14. Belcher, E., Hanot, W. and Burch, J., 2002, Dual-frequency Identification Sonar(DIDSON), Proceedings of the 2002 International Symposium on Underwater Technology, pp. 187~192.
  15. Treiber, M., Kim, J.-Y., Jacobs, L. and Qu, J., 2009, Correction for Partial Reflection in Ultrasonic Attenuation Measurements Using Contact Transducers, Journal of the Acoustical Society of America, Vol. 125, No. 5, pp. 2946~2953. https://doi.org/10.1121/1.3106125
  16. Blackstock, D., 2000, Fundamentals of Physical Acoustics, John Wiley and Sons Inc.
  17. Koopmann, G., Song, L. and Fahnline, J., 1989, A Method for Computing Acoustic Fields based on the Principle of Wave Superposition, Journal of theAcoustical Society of America, Vol. 86, No. 6, pp. 2433~2438. https://doi.org/10.1121/1.398450
  18. Fahnline, J. and Koopmann, G., 1991, A Numerical Solution for the General Radiation Problem based on the Combined Methods of Superposition and Singular-value Decomposition, Journal of the Acoustical Society of America, Vol. 90, No. 5, pp. 2808~2819. https://doi.org/10.1121/1.401878