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Development of Visualization System for Low-Frequency Electromagnetic Noise Sources

Research Project

Project/Area Number 16560361
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Measurement engineering
Research InstitutionKanazawa University

Principal Investigator

YAGITANI Satoshi  Kanazawa University, Graduate School of Natural Science and Technology, Associate Professor, 自然科学研究科, 助教授 (30251937)

Co-Investigator(Kenkyū-buntansha) NAGANO Isamu  Kanazawa University, Graduate School of Natural Science and Technology, Professor, 自然科学研究科, 教授 (50019775)
IMACHI Tomohiko  Information Media Center of Kanazawa University, Research Associate, 総合メディア基盤センター, 助手 (60372489)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2005: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2004: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsLocalization of noise sources / MUSIC algorithm / Low-frequency sources / Magnetic dipoles / Coherent sources / Wireless magnetic sensors / Source visualization / EMC / EMI / 線電流 / ループ電流
Research Abstract

In order to reduce the undesired electromagnetic (EM) noise emissions from the electrical and electronic equipment under the actual operating conditions, it is important to identify the locations of the noise sources inside the equipment, by measuring the EM field distributions of the noise emissions externally. In this study we have applied the MUSIC algorithm to estimate and visualize the 3-d locations and orientations of the low-frequency (less than MHz) current sources, by measuring the magnetic field distributions around the sources with an array of magnetic vector sensors. The main results obtained are as follows :
1. We have extended the MUSIC algorithm to localize not only the point dipole sources, but also the line and loop current sources which have finite spatial extent.
2. The conventional MUSIC algorithm was unable to distinguish highly coherent multiple dipole sources. On the basis of the "spatio-temporal independent topography" model, we have applied the RAP (Recursively Applied and Projected)-MUSIC algorithm with a multiple dipole search, to identify and localize the coherent dipole sources.
3. Awireless and portable AC magnetic field sensor has been developed.
4. We have developed an experimental system to locate the low-frequency current loop (magnetic dipole) sources. The magnetic field wave forms acquired by a couple of AC magnetic sensors are sampled and digitized by a PC, and the current sources are localized by the MUSIC algorithm. We also "visualize" the estimated sources on a computer screen, by superimposing them directly on the "real" camera image of the sources.
5. The low-frequency noise sources existing in the actual electric and electronic equipment, such as an electric heater, an LCD TV, and a notebook PC, have been localized and visualized with the developed system.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (21 results)

All 2006 2005 2004

All Journal Article (21 results)

  • [Journal Article] Localization of low-frequency electromagnetic dipole sources2006

    • Author(s)
      S.Yagitani, M.Kawauchi, K.Ishibana, I.Nagano, 他2名
    • Journal Title

      Proceedings of 2nd Kanazawa Workshop on Waves in Plasmas and Electromagnetic Applications

      Pages: 54-55

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Localization of low-frequency electromagnetic dipole sources2006

    • Author(s)
      S.Yagitani, M.Kawauchi, K.Ishibana, I.Nagano, E.Okumura, Y.Yoshimura
    • Journal Title

      Proceedings of 2nd Kanazawa Workshop on Waves in Plasmas and Electromagnetic Applications

      Pages: 54-55

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Localization of low-frequency electromagnetic dipole sources2006

    • Author(s)
      S.Yagitani, M.Kawauchi, K.Ishibana, I.Nagano, 他2名
    • Journal Title

      Proceedings of 2nd Kanazawa Workshop on Waves in Plasma and Electromagnetic Applications (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 低周波コヒーレント電磁波源の推定に関する研究2005

    • Author(s)
      石端 恭子, 河内 愛美, 八木谷 聡, 長野 勇, 他1名
    • Journal Title

      電子情報通信学会技術報告 EMCJ2004-119

      Pages: 13-18

    • NAID

      110003206206

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Localization of low-frequency electromagnetic sources2005

    • Author(s)
      S.Yagitani, K.Ishibana, I.Nagano, 他4名
    • Journal Title

      Electronics and Communications in Japan, Part I : Communications 88・6

      Pages: 1-10

    • NAID

      110003170768

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] MUSIC Localization of low-frequency magnetic dipole sources2005

    • Author(s)
      S.Yagitani, K.Ishibana, M.Kawauchi, I.Nagano, 他2名
    • Journal Title

      Proceedings of the 28th General Assembly of URSI

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Localization of coherent low-frequency electromagnetic sources2005

    • Author(s)
      K.Ishibana, M.Kawauchi, S.Yagitani, I.Nagano, Y.Yoshimura
    • Journal Title

      Technical Report of IEICE (in Japanese) vol.EMCJ2004-119

      Pages: 13-18

    • NAID

      110003206206

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Localization of low-frequency electromagnetic sources2005

    • Author(s)
      S.Yagitani, K.Ishibana, I.Nagano, Y.Nishi, Y.Yoshimura, H.Hayakawa, K.Tsuruda
    • Journal Title

      Electronics and Communications in Japan, Part I : Communications vol.88, no.6

      Pages: 1-10

    • NAID

      110003170768

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] MUSIC localization of low-frequency magnetic dipole sources2005

    • Author(s)
      S.Yagitani, K.Ishibana, M.Kawauchi, I.Nagano, E.Okumura, Y.Yoshimura
    • Journal Title

      Proceedings of 28th General Assembly of URSI EP.36

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Localization of low-frequency electromagnetic sources2005

    • Author(s)
      S.Yagitani, K.Ishibana, I.Nagano, 他4名
    • Journal Title

      Electronics and Communications in Japan, Part I: Communications 88・6

      Pages: 1-10

    • NAID

      110003170768

    • Related Report
      2005 Annual Research Report
  • [Journal Article] MUSIC localization of low-frequency electromagnetic sources2004

    • Author(s)
      S.Yagitani, K.Ishibana, I.Nagano, 他4名
    • Journal Title

      Proceedings of 2004 URSI EMTS (International Symposium on Electromagnetic Theory) 1

      Pages: 507-509

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Localization and visualization of low-frequency electromagnetic sources2004

    • Author(s)
      K.Ishibana, S., Yagitani, I., Nagano, M.Kawauchi, 他3名
    • Journal Title

      2004 International Symposium on Electromagnetic Compatibility (EMC'04) 1

      Pages: 389-392

    • NAID

      110003175867

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] MUSIC localization of low-frequency current loop sources2004

    • Author(s)
      K.Ishibana, S.Yagitani, M.Kawauchi, I.Nagano, 他3名
    • Journal Title

      Proceedings of 2004 International Symposium on Antennas and Propagation (ISAP 2004) 1

      Pages: 29-32

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 低周波電磁波源の位置推定に関する研究2004

    • Author(s)
      八木谷 聡, 石端 恭子, 長野 勇, 他4名
    • Journal Title

      電子情報通信学会論文誌B J87-B・8

      Pages: 1085-1093

    • NAID

      110003170768

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] MUSIC localization of low-frequency electromagnetic sources2004

    • Author(s)
      S.Yagitani, K.Ishibana, I.Nagano, Y.Nishi, Y.Yoshimura, H.Hayakawa, K.Tsuruda
    • Journal Title

      Proceedings of 2004 URSI International Symposium on Electromagnetic Theory (EMTS) vol.1

      Pages: 507-509

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Localization and visualization of low-frequency electromagnetic sources2004

    • Author(s)
      K.Ishibana, S.Yagitani, I.Nagano, M.Kawauchi, Y.Yoshimura, H.Hayakawa, K.Tsuruda
    • Journal Title

      2004 International Symposium on Electromagnetic Compatibility (EMC'04) vol.1

      Pages: 389-392

    • NAID

      110003175867

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] MUSIC localization of low-frequency current loop sources2004

    • Author(s)
      K.Ishibana, S.Yagitani, M.Kawauchi, I.Nagano, Y.Yoshimura, H.Hayakawa, K.Tsuruda
    • Journal Title

      Proceedings of 2004 International Symposium on Antenna and Propagation (ISAP'04) vol.1

      Pages: 29-32

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Localization of low-frequency electromagnetic sources2004

    • Author(s)
      S.Yagitani, K.Ishibana, I.Nagano, Y.Nishi, Y.Yoshimura, H.Hayakawa, K.Tsuruda
    • Journal Title

      IEICE Transactions on Communications (in Japanese) vol.J87-B, no.8

      Pages: 1085-1093

    • NAID

      110003170768

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] MUSIC localization of low-frequency electromagnetic sources2004

    • Author(s)
      S.Yagitani, K.Ishibana, I.Nagano, 他4名
    • Journal Title

      Proceedings of 2004 URSI EMTS(International Symposium on Electromagnetic Theory) 1

      Pages: 507-509

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Localization and visualization of low-frequency electromagnetic sources2004

    • Author(s)
      K.Ishibana, S.Yagitani, I.Nagano, M.Kawauchi, 他3名
    • Journal Title

      2004 International Symposium on Electromagnetic Compatibility(EMC'04) 1

      Pages: 389-392

    • NAID

      110003175867

    • Related Report
      2004 Annual Research Report
  • [Journal Article] MUSIC localization of low-frequency current loop sources2004

    • Author(s)
      K.Ishibana, S.Yagitani, M.Kawauchi, I.Nagano, 他3名
    • Journal Title

      Proceedings of 2004 International Symposium on Autennas and Propagation(ISAP 2004) 1

      Pages: 29-32

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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