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International standardization of safety evaluation for intermediate frequencies using three-dimensional electromagnetic field analysis

Research Project

Project/Area Number 18K04077
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21010:Power engineering-related
Research InstitutionKitami Institute of Technology

Principal Investigator

Taguchi Kenji  北見工業大学, 工学部, 准教授 (60435485)

Co-Investigator(Kenkyū-buntansha) 柏 達也  北見工業大学, 工学部, 教授 (30211155)
平田 晃正  名古屋工業大学, 工学(系)研究科(研究院), 教授 (00335374)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords中間周波帯 / 人体ばく露 / 安全性評価 / 国際標準化 / 3次元電磁界解析 / FDTD法 / FDFD法 / 中間周波数
Outline of Final Research Achievements

In the ICNIRP guideline and the IEEE C95.1 standard, the dominant effect for electromagnetic field exposures at frequencies above 100 kHz is the thermal effect. The external field strengths or incident power density, corresponding to the limit for the whole-body- and 10g-averaged SARs, are also used as metrics for practical compliance purposes. However, the limits for the external field strengths differ by a factor of 7.4-12.9 in an intermediate frequency range (100 kHz to 100 MHz).
In this study, the relationship between the SARs and external field strengths has computed by using the human models. For the main finding, it was also found that the relationship between SARs and external field strength was satisfied, but was more conservative in the ICNIRP guidelines, whereas there were slight discrepancies below 30 MHz in the IEEE standard. The computational results would be useful for revising the permissible external field strength based on scientific results.

Academic Significance and Societal Importance of the Research Achievements

研究開始当時におけるICNIRP及びIEEEの両ガイドラインは、解剖学に基づく詳細な人体数値モデルが開発される前に制定されたものであり、高精細な人体数値モデルを用いて人体のSARと外部電磁界強度の具体的な関係性を再検証することに学術的意義がある。更に、全電磁界解析に基づく高精度な3次元全身ばく露解析に基づくばく露評価により、科学的根拠に基づくデータを提供すること社会的意義がある。尚、本研究の結果は、2020年3月に発布されたICNIRP2020ガイドラインに引用されており、適切な安全基準の策定、安心・安全な電磁界利用の促進に貢献している。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results) Book (2 results)

  • [Int'l Joint Research] Aalto University(フィンランド)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] South China Agricultural University(中国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Risk Evaluation of Heat Stroke with Multiphysics Computation and its Application2018

    • Author(s)
      平田晃正, 長谷川一馬, 小寺紗千子, Ilkka Laakso, 江川隆輔, 堀江祐圭, 矢﨑菜名子, 田口健治, 柏達也
    • Journal Title

      IEEJ Transactions on Fundamentals and Materials

      Volume: 138 Issue: 6 Pages: 288-294

    • DOI

      10.1541/ieejfms.138.288

    • NAID

      130007382619

    • ISSN
      0385-4205, 1347-5533
    • Year and Date
      2018-06-01
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] サブグリッド法に基づくSPFD解析による一様磁界ばく露解析2018

    • Author(s)
      中西優大, 伊藤孝弘, 平田晃正, 田口健治, 柏達也
    • Journal Title

      電子情報通信学会論文誌C

      Volume: vol. J101-C, no. 5 Pages: 256-275

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Relationship of External Field Strength with Local and Whole-body Averaged Specific Absorption Rates in Anatomical Human Models2018

    • Author(s)
      K. Taguchi, I. Laakso, K. Aga, A. Hirata, Y. Diao, J. Chakarothai, T. Kashiwa
    • Journal Title

      IEEE Access

      Volume: vol. 6 Pages: 70186-70196

    • DOI

      10.1109/access.2018.2880905

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 中間周波数帯人体電磁ばく露評価のためのFDFD並列計算の基礎検討2020

    • Author(s)
      三隅隆志, 田口健治, 柏達也
    • Organizer
      令和2年度電気・情報関係学会北海道支部連合大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] FDTD法によるミリ波帯人体全身SAR評価に関する基礎検討2019

    • Author(s)
      小寺紗千子, 平田晃正, 田口健治, 柏達也
    • Organizer
      電子情報通信学会 エレクトロニクスシミュレーション研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] Development on High Resolution Human Voxel Model for High Frequency Exposure Analysis2018

    • Author(s)
      K. Taguchi, T. Kashiwa, A. Hirata
    • Organizer
      PIERS
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Book] Computational Anatomical Animal Models2019

    • Author(s)
      K. Wake, A. Hirata, K. Taguchi, and etc.
    • Total Pages
      400
    • Publisher
      IOP Publishing Ltd.
    • ISBN
      9780750313452
    • Related Report
      2018 Research-status Report
  • [Book] Antennas for Small Mobile Terminals2018

    • Author(s)
      T. Kashiwa, K. Taguchi, and etc.
    • Total Pages
      288
    • Publisher
      ARTECH HOUSE
    • ISBN
      9781630810955
    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

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