Direct reconstruction of the magnetic field source based on local measurements and its application to RFID localization

• Project/Area Number: 19686027
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Measurement engineering
• Research Institution: The University of Electro-Communications
• Principal Investigator: NARA Takaaki The University of Electro-Communications, 電気通信学部, 准教授 (80353423)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2007: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: センシング情報処理 / 逆問題 / 電磁場源 / RFIDタグ / 多重極展開 / 直接再構成 / 四重極 / 部分境界 / フーリエコイル / 磁場源推定 / ソース推定 / 複素勾配 / フーリエ係数 / 局所対称性

Research Abstract

近年ユビキタスコンピューティングのキーデバイスとしてRFIDタグが様々なモノ・ヒト・環境に貼られている。ID情報に加え位置情報が推定できれば、ロケーションアウェアなインタフェースが実現できる。本研究は135kHzのパッシブタグからの応答である磁場に対し、円周上のフーリエ係数に着目し、これを直接計測するコイルを開発し、200mm四方程度の領域で8mm程度の誤差で定位するシステムを開発した。また局部観測による磁場源直接再構成手法は、脳内神経電流源推定や探傷にも有効であることも示した。

Research Products

• [Journal Article] An algebraic method for identification of dipoles and quadrupoles (2008)
  • Author(s): Takaaki Nara
  • Journal Title: Inverse Problems 24 Pages: 19-19
  • Peer Reviewed
• [Presentation] 部分境界データによる双極子推定逆問題の厳密直接代数解法 (2008)
  • Author(s): 奈良高明, 安藤繁
  • Organizer: 日本応用数理学会2008年度年会
  • Place of Presentation: 東京大学
  • Year and Date: 2008-09-17
• [Presentation] A coil for measuring the Fourier coefficients of the magnetic field and its application to dipole localization (2008)
  • Author(s): Takaaki Nara, Shigeru Ando
  • Organizer: SICE Annual Conference 2008
  • Place of Presentation: Tokyo
  • Year and Date: 2008-08-20
• [Presentation] A coil for measuring the Fourier coefficients of the magneticfield and its annlication to dipole localization (2008)
  • Author(s): Takaaki Nara and Shigeru Ando
  • Organizer: SICE Annual Conference 2008
  • Place of Presentation: 電気通信大学
  • Year and Date: 2008-08-20
• [Presentation] An iterative algebraic algorithm for the magnetoencephalography inverse problems (2008)
  • Author(s): akaaki Nara, d Shigeru Ando
  • Organizer: Society for Industrial and Applied Mathematics Imaging Science 2008
  • Place of Presentation: San Diego
  • Year and Date: 2008-07-08
• [Presentation] An iterative algebraic algorithm for the magnetoencephalography inverse problems (2008)
  • Author(s): Takaaki Nara and Shigeru Ando
  • Organizer: Society for Industrial and Applied Mathem atics Imaging Science 2008
  • Place of Presentation: San Diego
  • Year and Date: 2008-07-08
• [Presentation] Reconstruction of the number and positions of dipoles and quadrupoles using an algebraic method (2008)
  • Author(s): Takaaki Nara
  • Organizer: The 6th international conference on inverse problems in Engineering
  • Place of Presentation: Paris
  • Year and Date: 2008-06-16
• [Presentation] Reconstruction of the number and positions of dipoles and quadrupoles using an algebraic method (2008)
  • Author(s): Takaaki Nara
  • Organizer: The 6^<th> international conference on inverse problems in Engineering
  • Place of Presentation: Paris
  • Year and Date: 2008-06-15
• [Presentation] 局所対称性に基づく画像特徴抽出 (2007)
  • Author(s): 小田悠司、奈良高明、安藤繁
  • Organizer: 第24回センシングフォーラム
  • Place of Presentation: 東北文化学園大学
  • Year and Date: 2007-10-26
• [Presentation] An inverse source problem for the Helmholtz equation (2007)
  • Author(s): Takaaki Nara
  • Organizer: International Workshop on Applied Mathematics and Computational Science
  • Place of Presentation: Tokyo
  • Year and Date: 2007-09-26
• [Presentation] An inverse source problem for the Helmholtz equation (2007)
  • Author(s): Takaaki Nara
  • Organizer: International Workshop on Applied Mathematics and Computational Science
  • Place of Presentation: 電気通信大学
  • Year and Date: 2007-09-26
• [Presentation] 大脳皮質の形状情報を利用した脳磁図逆問題の直接解法 (2007)
  • Author(s): 橋本将、奈良高明
  • Organizer: 日本応用数理学会2007年度年会
  • Place of Presentation: 北海道大学
  • Year and Date: 2007-09-16
• [Patent(Industrial Property Rights)] 磁気センサおよび漏洩磁束探傷装置 (2008)
  • Inventor(s): 奈良高明
  • Industrial Property Rights Holder: 電気通信大学
  • Industrial Property Number: 2008-186463
  • Filing Date: 2008-07-17