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Study on development of the remote electromagnetic wave testing system by micro antenna

Research Project

Project/Area Number 11355006
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Materials/Mechanics of materials
Research InstitutionTohoku University

Principal Investigator

SHOJI Tetsuo  Tohoku University, Graduate School of Engineering, Prof., 大学院・工学研究科, 教授 (80091700)

Co-Investigator(Kenkyū-buntansha) SATO Yasumoto  Tohoku University, Graduate School of Engineering, JSPS, Postdoctral fellow, 大学院・工学研究科, 特別研究員
TAMAKAWA Kinji  Tohoku University, Graduate School of Engineering, Res. Ass., 大学院・工学研究科, 助手 (30005368)
SATO Motoyuki  Tohoku University, Center of Northeast Asian Studies, Prof., 東北アジア研究センター, 教授 (40178778)
SAGA Takeshi  Scientia Corporation, R&D group, Researcher, 研究開発グループ, 研究員(研究職)
MINKOV DORIAN  東北大学, 大学院・工学研究科, 助教授 (30291264)
中里 俊晴  株式会社 サイエンティア 研究開発グループ, グループリーダー(研究職)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥29,580,000 (Direct Cost: ¥28,200,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2001: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2000: ¥11,700,000 (Direct Cost: ¥11,700,000)
Fiscal Year 1999: ¥11,900,000 (Direct Cost: ¥11,900,000)
KeywordsNondestructive inspection / Magneto-Optical Inspection / Electromagnetic / Antenna / Surface Crack / 遠隔探傷
Research Abstract

We have developed a novel non-contact electromagnetic NDI system that after applying an alternating current to specimen detected indirectly the changes in the magnetic field generated by the changes in the induced signal flow around a crack with micro antenna (dipole antenna, loop antenna). We have obtained the following knowledge as a result of carrying out a series of measurement in order to obtain the indicator of establishing various parameters to improve the detection sensitivity in the method that the induction wire induces high frequency current was attached to an inspection object and then micro antenna scanned around there.
1. To generate the constant existing wave depends on the frequency, the induction wire applied a current and the length of specimen, the frequency reduces this influence exists.
2. In this research it is possible to detect the defect with a depth of 1 mm in the case of rift-off 10 mm and it is promising as a remote inspection method.
3. We can raise the detect … More ion sensitivity about 30 % as compared with the time of research start by the combination of the length of 15 mm and diameter of 0.26 mm as a result of examination the optimization of micro dipole antenna length and a diameter.
4. We can raise the detection sensitivity about 2.3 times as compared with the time of research start as a result of examination the loop diameter of a micro loop antenna.
5. It is related with a fatigue crack with a depth of 5.5 mm, the detection sensitivity of a micro loop antenna is about 2.6 times as high as a micro dipole antenna. It is based on the above result ; an antenna sensor combined with an induced wire was developed.
6. It is possible to detect the fatigue crack made into the ferromagnetic material and the paramagnetic material by the sensor combined an induced wire.
7. Although the signal by developed one apparatus sensor showed the asymmetrical distribution to the symmetrical crack, it is thought that a symmetrical signal distribution is obtained by arranging two for an induced line to an antenna, as a result of carrying out the plane detection of the crack circumference for fatigue crack form measurement.
8. A novel non-contact NDI technique that detection of a crack is possible without concerned with the quality of the material was developed. Less

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] 佐藤 雅子: "小アンテナによる新しい電磁探傷法の開発に関する研究"日本機械学会論文集(A編). 65-63. 925-931 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yasumoto Sato: "Nondestructive Inspection Based on Electoromagnetic Technique-Potential Drop and Micro Antenna techniques-"Proceedings of The Sixth International Conference on Material Issues in Design, Manufacturing and Operation of Nuclear Power Plants Equipment. 1. 271-281 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 庄子哲雄: "電位差法の最近の動向と課題"非破壊検査. 49・11. 759-766 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yasumoto Sato: "Crack Detection by a Small Loop Antenna"Electro-magnetic Nondestructive Evaluation (VI). (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kenichi Yagi: "Crack Detection by Means of Electoromagnetic Field Measurement with Micro Antennas"Proceedings of APCFS'01 & ATEMA'01), October 20-22,2001,Sendai, Japan. 1. 280-285 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tetsuo Shoji: "Development of Novel NDE techniques and their Significance in the COE program on the Physics and Chemistry of Fracture and Failure Prevention"International Journal of Applied Electromagnetics and Mechanics. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N. Sato, T. Shoji, Y. Sato, M.Sato: "Development of a Novel Electromagnetic Technique for Detection of Cracks by Use of Micro Antenna"Transactions of the Japan Society of Mechanical Engineers (A). Vol.65, No.63. 925-931 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yasumoto Sato: "Nondestructive Inspection Based on Electromagnetic Technique -Potential Drop and Micro Antenna techniques-"Proceedings of The Sixth International Conference on Material Issues in Design, Manufacturing and Operation of Nuclear Power Plants Equipment. 1. 271-281 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tetsuo Shoji: "Current Status and Future Direction of Potential Drop Method for QNDE"Journal of the Japanese Society for Nondestructive lnspection. Vol.49, No.11. 759-766 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yasumoto Sato: "Crack Detection by a Small Loop Antenna"Electro-magnetic Nondestructive Evaluation (VI). (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kenichi Yagi: "Craek Detection by Means of Electromagnetic Field Measurement with Micro Antennas"Proceedings of APCFS'01 & ATEM'01, October 20-22, 2001, Sendai, Japan. Vol.1. 280-285 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tetsuo Shoji: "Development of Novel NDE techniques and their Significance in the COE program on the Physics and Chemistry of Fracture and Failure Prevention"International Journal of Applied Electromagnetics and Mechanics. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yasumoto Sato: "Crack Detection by a Small Loop Antenna"Electro-magnetic Nondestructive Evaluation(VI). (in press).

    • Related Report
      2001 Annual Research Report
  • [Publications] Kenichi Yagi: "Crack Detection by Means of Electromagnetic Field Measurement with Micro Antennas"Proceedings of APCFS'01 & ATEM'01), October 20-22, 2001, Sendai, Japan. 1. 280-285 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tetsuo Shoji: "Development of Novel NDE techniques and their Significance in the COE program on the Physics and Chemistry of Fracture and Failure Prevention"International Journal of Applied Electromagnetics and Mechanics. (in press).

    • Related Report
      2001 Annual Research Report
  • [Publications] Yasumoto Sato: "Nondestructive Inspection Based on Electromagnetic Technique -Potential Drop and Micro Antenna techniques-"Proceedings of The Sixth International Conference on Material Issues in Design, Manufacturing and Operation of Nuclear Power Plants Equipment 1. 271-281 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 庄子哲雄: "電位差法の最近の動向と課題"非破壊検査. 49・11. 759-766 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 八木賢一: "微小アンテナを用いた電磁場探傷法によるき裂検出"平成12年度材料力学部門講演会講演論文集. 331-332 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kenichi Yagi: "Inspection of Metal Surface Containing Cracks by Small Antennas"Review of Progress in QNDE. 20(in press).

    • Related Report
      2000 Annual Research Report
  • [Publications] 佐藤雅子: "微小アンテナによる新しい電磁探傷法の開発に関する研究"日本機械学会論文集(A編). 63-632. 925-931 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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