2012 Fiscal Year Final Research Report
Development of grating fiber sensor with asymmetrical cross section detectable the bending direction for prevention of slope failures
| Project/Area Number |
21510200
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Natural disaster science
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| Research Institution | Gifu National College of Technology |
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Principal Investigator |
KUMAZAKI Hironori 岐阜工業高等専門学校, 電気情報工学科, 教授 (70270262)
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| Project Period (FY) |
2009 – 2012
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| 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 |
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| 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.
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