Development of grating fiber sensor with asymmetrical cross section detectable the bending direction for prevention of slope failures

• Project/Area Number: 21510200
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Natural disaster science
• Research Institution: Gifu National College of Technology
• Principal Investigator: KUMAZAKI Hironori 岐阜工業高等専門学校, 電気情報工学科, 教授 (70270262)
• Project Period (FY): 2009 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2011: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000); Fiscal Year 2010: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000); Fiscal Year 2009: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
• Keywords: 土砂災害 / ファイバセンサ / ファイバグレーティング / 異方性エッチング / ファイバブラッググレーティング / 斜面崩壊 / 曲げセンサ / 屈折率 / 反応性イオンエッチング / 非対称断面 / ファイバグレーティング(FBG) / 曲げおよびひずみ / 反応性イオンエッチング(RIE) / 反応イオンエッチング(RIE)

Research Abstract

Micro-machined grating fiber was evaluated as a sensor for prevention of slope failures. There is some possibility to detect refractive index of liquid on the fiber tip by the difference of reflected light power between at the center reflection wavelength and at the other wavelengths. Reflected light spectra were measured, when a serial arrangement of two FBGs with two different center reflection wavelengths and similar asymmetrical cross sections with different etching faces was bent. It was found that bend was recognized with accuracy of 5°in bend direction and 3.0 m-1in curvature when the clad thickness was 14μm.

Research Products

• [Presentation] 曲げに対する直列型非対称断面FBGの反射特性、 (2013)
  • Author(s): 熊崎裕教・稲葉成基・小栗久和、羽根一博
  • Organizer: 平成25年電気学会全国大会論文集
  • Place of Presentation: 名古屋大学
  • Year and Date: 2013-03-22
• [Presentation] Mechanical stress sensors using micromachined grating fibers (2011)
  • Author(s): ○Hironori Kumazaki, Munehiro Hiramatsu, Hisakazu Oguri, Seiki Inaba, and Kazuhiro Hane
  • Organizer: 21st International Conference on Optical Fiber Sensors
  • Place of Presentation: Ottawa,Canada)
  • Year and Date: 2011-05-19
• [Presentation] Mechanical stress sensors using micromachined grating fibers (2011)
  • Author(s): Hironori Kumazaki
  • Organizer: 21^<st> International Conference on Optical Fiber Sensors
  • Place of Presentation: Ottawa, Canada
• [Presentation] 微細加工FBGによるひずみ測定精度の向上 (2010)
  • Author(s): 平松宗大・梅田晶央・熊崎裕教・小栗久和・稲葉成基・羽根一博
  • Organizer: 平成22年度電気学会全国大会論文集
  • Place of Presentation: 明治大学駿河台キャンパス)
  • Year and Date: 2010-03-17
• [Presentation] 微細加工FBGによるひずみ測定精度の向上 (2010)
  • Author(s): 平松宗大、梅田晶央、熊崎裕教, 他
  • Organizer: 電気学会全国大会
  • Place of Presentation: 東京 明治大学
  • Year and Date: 2010-03-17
• [Presentation] 曲げに対する直列型非対称断面FBGの反射特性
  • Author(s): 熊崎裕教
  • Organizer: 電気学会全国大会
  • Place of Presentation: 名古屋大学