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2004 Fiscal Year Final Research Report Summary

Research on controllability of radiation direction of nondiffiracting ultrasonic beam by non-concentric annular array sound source

Research Project

Project/Area Number 15560355
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Measurement engineering
Research InstitutionToba National College of Maritime Technology

Principal Investigator

MASUYAMA Hiroyuki  Toba National College of Maritime Technology, Electronic Mechanical Engineering Department, Research Associate, 電子機械工学科, 助手 (90334052)

Co-Investigator(Kenkyū-buntansha) MIZUTANI Koichi  University of Tsukuba, Graduate School of Systems and Information Science, Professor, 大学院・システム情報工学研究科, 教授 (50241790)
Project Period (FY) 2003 – 2004
KeywordsTransducer Array / Annular Array / Nondiffracting Beam / Decentering / Beam Scanning / Noncontacting measurement / Complex Sound Field / Visualization
Research Abstract

The purpose of this research is forming the ultrasonic beam without diffracting, by constructing sound source using non-concentric annular array, and making the radiation direction of beams controllable.
At first, by conducting decentering for the annular array in which clearances exist between elements, it was confirmed that changing the direction of radiated beam becomes possible. By numerical analyses, it is shown that the beam radiated to the direction of 15 degrees from the sound axis, by the array with ten elements, still keeps a sharp profile. And, it was shown that the radiation of narrow beams was possible for the direction deviated from the sound axis, even when the number of array element was small. In addition, effects caused by the fluctuation of the decentering ratio in each element were verified, and relations between actually decentered element and vertical distance where the direction of beams deviates were found.
Continuously, examinations on the configuration of source element, for effectively changing of the beam direction, were carried out, and it was confirmed that the direction of beams propagated without diffraction was variable, when the number of decentering element was minimized, and that the possibility as a precise parallel scanning method of the beam was found. Besides, the technique for setting the propagation path of beam more in detail was examined, and the technique that obtains beams with the twisted propagation path was found.
Furthermore, as a means for carrying out measurement experiments, techniques for measuring sound fields were also examined. Noncontact and noninvasive measuring systems for sound fields were constructed based on the optical technique using two kinds of interferometers. Measurement experiments using general sound sources were carried out, and in the visualization of two-dimensional complex distribution of radiated fields, results with the tendency that agreed with numerical results well were obtained.

  • Research Products

    (26 results)

All 2005 2004 2003 Other

All Journal Article (26 results)

  • [Journal Article] Directional Trimming of Radiated Ultrasonic Beam Using Decentered Annular Transducer Array2005

    • Author(s)
      Hiroyuki Masuyama
    • Journal Title

      Japanese Journal of Applied Physics 44

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Scanning of Acoustic Beam Using Decentering Operation for Annular Transducer Array2005

    • Author(s)
      Hiroyuki Masuyama
    • Journal Title

      Proceedings of VS Tech 2005, The First International Symposium on Advanced Technology of Vibration and Sound

      Pages: 73-77

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Directional Trimming of Radiated Ultrasonic Beam Using Decentered Annular Transducer Array2005

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Japanese Journal of Applied Physics 44,6B(in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Scanning of Acoustic Beam Using Decentering Operation for Annular Transducer Array2005

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Proceedings of The First International Symposium on Advanced Technology of Vibration and Sound

      Pages: 73-77

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Visualization of Ultrasonic Fields Using Michelson Interferometer2004

    • Author(s)
      Takeshi Obuchi
    • Journal Title

      Proceedings of Symposium on Ultrasonic Electronics 25

      Pages: 117-118

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 偏心円環トランスデューサアレイによる超音波ビームの放射方向トリミング2004

    • Author(s)
      増山裕之
    • Journal Title

      超音波エレクトロニクスの基礎と応用に関するシンポジウム論文集 25

      Pages: 29-30

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Measurement of Sound Fields Using Mach-Zehnder Interferometer2004

    • Author(s)
      Manabu Nemoto
    • Journal Title

      Japanese Journal of Applied Physics 43

      Pages: 6444-6447

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of Decentering Ratio of Elements in a Variable Radiation Direction Sound Source on Beam Profile2004

    • Author(s)
      Hiroyuki Masuyama
    • Journal Title

      Acoustical Science and Technology 25

      Pages: 386-388

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Decentered Annular Transducer Array for Generating Direction-Variable Acoustic Beam2004

    • Author(s)
      Hiroyuki Masuyama
    • Journal Title

      Proceedings of The 16th World Conference on Nondestructive Testing (CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 円環アレイによる放射方向可変型音源2004

    • Author(s)
      増山裕之
    • Journal Title

      超音波テクノ 16

      Pages: 42-46

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Visualization of Ultrasonic Fields Using Michelson Interferometer2004

    • Author(s)
      Takeshi Obuchi, Satoshi Nakanishi, Koichi Mizutani, Hiroyuki Masuyama
    • Journal Title

      Proceedings of Symposium on Ultrasonic Electronics 25

      Pages: 117-118

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Directional Trimming of Radiated Ultrasonic Beam by Decentered Annular Transducer Array2004

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Proceedings of Symposium on Ultrasonic Electronics (in Japanese) 25

      Pages: 29-30

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Measurement of Sound Fields Using Mach-Zehnder Interferometer2004

    • Author(s)
      Manabu Nemoto, Koichi Mizutani, Tomohiro Ezure, Hiroyuki Masuyama
    • Journal Title

      Japanese Journal of Applied Physics 43,9A

      Pages: 6444-6447

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of decentering ratio of elements in a variable radiation direction sound source on beam profile2004

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Acoustical Science and Technology 25,5

      Pages: 386-388

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Decentered Annular Transducer Array for Generating Direction-Variable Acoustic Beam2004

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Proceedings of The 16th World Conference on Nondestructive Testing (CD-ROM)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Variable radiation direction sound source using annular array - Effect of decentering ratio fluctuation of array element on radiated beam -2004

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani
    • Journal Title

      Ultrasonic Technology (in Japanese) 16,3

      Pages: 42-46

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of Decentering Ratio Fluctuation of Annular Array Element in Direction-Variable Type Sound Sources2004

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Japanese Journal of Applied Physics 43,5B

      Pages: 2822-2826

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Correspondence between Individual Decentered Element and Alteration of Beam Direction in Annular Array Sound Source2004

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Proceedings of The 18th International Congress on Acoustics (I)

      Pages: 671-674

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Optical Measurement of Sound Fields with Diffraction-Effect Using Mach-Zehnder Interferometer2003

    • Author(s)
      Tomohiro Ezure, Koichi Mizutani, Hiroyuki Masuyama
    • Journal Title

      Japanese Journal of Applied Physics 42,12

      Pages: 7599-7600

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Optical Measurement of Sound Fields Estimated from Multiple Interference Images Using Mach-Zehnder Interferometer2003

    • Author(s)
      Tomohiro Ezure, Koichi Mizutani, Hiroyuki Masuyama
    • Journal Title

      The Institute of Electronics, Information and Communication Engineers (IEICE) Transaction on Electronics (Japanese Edition) C, (in Japanese) J86-C,12

      Pages: 1324-1330

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Measurement of Sound Fields Using Mach-Zehnder Interferometer2003

    • Author(s)
      Manabu Nemoto, Koichi Mizutani, Tomohiro Ezure, Hiroyuki Masuyama
    • Journal Title

      Proceedings of Symposium on Ultrasonic Electronics (in Japanese) 24

      Pages: 209-210

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of Decentering Ratio Fluctuation of Annular Array Element on Direction-Variable Beam2003

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Proceedings of Symposium on Ultrasonic Electronics (in Japanese) 24

      Pages: 17-18

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Optical Computerized Tomography System for Visualization of Sound Fields Using Mach-Zehnder Interference Images Detected by Charge Coupled Device2003

    • Author(s)
      Tomohiro Ezure, Koichi Mizutani, Hiroyuki Masuyama
    • Journal Title

      Proceedings of The Fifth World Congress on Ultrasonics

      Pages: 1245-1248

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Direction-Variable Type Sound Source by Annular Transducer Array2003

    • Author(s)
      Hiroyuki Masuyama, Koichi Mizutani, Keinosuke Nagai
    • Journal Title

      Proceedings of VS Tech 2003 Symposium on New Technology of Vibration and Sound (in Japanese)

      Pages: 140-143

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Visualization of Ultrasonic Beam Using Michelson Interferometer2003

    • Author(s)
      Koichi Mizutani, Manabu Nemoto, Tomohiro Ezure, Hiroyuki Masuyama
    • Journal Title

      Japanese Journal of Applied Physics 42,5B

      Pages: 3072-3075

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Visualization of Ultrasonic Beam Using Mach-Zehnder Interferometer

    • Author(s)
      Manabu Nemoto, Tomohiro Ezure, Satoshi Nakanishi, Koichi Mizutani, Hiroyuki Masuyama
    • Journal Title

      Proceedings of 32nd Meeting on Lightwave Sensing Technology (in Japanese) 2003.12

      Pages: 197-202

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2006-07-11  

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