Development of handwriting-electric signal transformation technology for next generation papers utilizing piezoelectric porous sheets

• Project/Area Number: 21760053
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Applied physics, general
• Research Institution: 財団法人小林理学研究所 (2011); Kobayasi Institute of Physical Research (2009-2010)
• Principal Investigator: KODAMA Hidekazu 財団法人小林理学研究所, 圧電物性デバイス研究室, 研究員 (60373198)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 圧電性 / ポーラスポリマー / エレクトレット / 圧電共鳴 / 非線形誘電率 / 圧電率 / 弾性率 / テンソル成分 / 多孔質ポリマー / 弾性損失係数 / 電気力学変換 / 非線形誘電 / ポリマー / センサー / 線形誘電率 / 電性 / 多孔質ポリマーシート / 筆跡 / 信号変換 / 共振周波数 / 時間応答

Research Abstract

Handwriting-electric signal transformation technique utilizing piezoelectric porous sheets has been studied. Direct conversion of the brush pressure to an electric signal by the piezoelectricity was effective compared with other considerable methods. Both piezoelectric and elastic properties of the sheet were precisely studied by means of dielectric and nonlinear permittivity measurements. It was found that the sheet is very soft in thickness and an oscillating damping characteristic is also remarkable. A touch and release sensor based on this technique was also tested.

Research Products

• [Presentation] Electromechanical Properties and Acoustic Applications of High Sensitivity Porous Polypropylene Electrets (2011)
  • Author(s): H. Kodama, Y. Yasuno, T. Furukawa and E. Fukada
  • Organizer: Smart Materials, Structures & NDT in Aerospace
  • Place of Presentation: Montreal, Quebec, Canada
• [Presentation] A series of electromechanical measurements for determination of piezoelectric, dielectric and elastic tensor components in porous polypropylene electrets (2011)
  • Author(s): Hidekazu Kodama, Tatsuya Osawa, Yoshinobu Yasuno and Takeo Furukawa
  • Organizer: 14^<th> International Symposium on Electrets
  • Place of Presentation: Montpellier, France
• [Presentation] Electromechanical Properties and Acoustic Applications of High Sensitivity Porous Polypropylene Electrets (2011)
  • Author(s): H.Kodama, Y.Yasuno, T.Furukawa, E.Fukada
  • Organizer: Smart Materials, Structures & NDT in Aeropsace
  • Place of Presentation: Montreal, Quebec, Canada
• [Presentation] 多孔性ポリプロピレンの圧電特性を応用した空中超音波送受器の温度特性 (2010)
  • Author(s): 安野功修,児玉秀和
  • Organizer: 日本音響学会2010年春季研究発表会
  • Place of Presentation: 電気通信大学(東京)
  • Year and Date: 2010-03-10
• [Presentation] A Study of Time Stability of Piezoelectricity in Porous Polypropylene Electrets (2009)
  • Author(s): Hidekazu Kodama, Yosinobu Yasuno, Munehiro Date and Eiichi Fukada
  • Organizer: 2009 IEEE Ultrasonics Symposium
  • Place of Presentation: Roma, Italy
  • Year and Date: 2009-09-21
• [Presentation] 多孔性ポリプロピレンの圧電特性を応用した空中超音波送受器の検討 (2009)
  • Author(s): 安野功修,児玉秀和
  • Organizer: 日本音響学会2009年秋季研究発表会
  • Place of Presentation: 日本大学(福島)
  • Year and Date: 2009-09-15
• [Book] 実践高分子の構造・物性分析・測定 (2010)
  • Author(s): 古川猛夫,児玉秀和
  • Publisher: サイエンス & テクノロジー
• [Book] 実践 高分子の構造・物性分析・測定 (2010)
  • Author(s): 古川猛夫, 児玉秀和
  • Total Pages: 21
  • Publisher: サイエンス&テクノロジー
• [Patent(Industrial Property Rights)] エネルギー変換用フィルム (2009)
  • Inventor(s): 児玉秀和,安野功修,深田栄一,小池弘,飯田誠一郎
  • Industrial Property Rights Holder: (株)ユポ・コーポレーション
  • Filing Date: 2009-09-17
• [Patent(Industrial Property Rights)] エネルギー変換用フィルム (2009)
  • Inventor(s): 児玉秀和、安野功修, 深田栄一, 小池弘、飯田誠一郎
  • Industrial Property Rights Holder: (株)ユポ・コーポレーション
  • Industrial Property Number: 2009-215184
  • Filing Date: 2009-09-17