Title:
ブリルアン光繊維センサーを用いた物理量測定方法
Document Type and Number:
Japanese Patent JP4260120
Kind Code:
B2
Abstract:
Provided is a physical quantity measuring method using a Brillouin optical fiber sensor. An optical fiber is set on a structure and a pair of pulse lights having different pulse widths is selected (S1000,S2000). The pulse lights are sequentially transmitted through the optical fiber to obtain back scattering lights and Brillouin gain spectra (S3000). The Brillouin gain spectra are compared to each (S4000) other to calculate a normalized spectrum and a Brillouin frequency is acquired based on the normalized spectrum (S5000). The Brillouin frequency is multiplied by a conversion factor of a corresponding physical quantity of the structure to obtain the physical quantity (S6000). Accordingly, a portion of the optical fiber from which a sensing signal can be acquired is shortened to improve spatial resolution.
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Inventors:
Authority
Youn
Lee Jeonju
Gold Minister
Youn
Lee Jeonju
Gold Minister
Application Number:
JP2005047373A
Publication Date:
April 30, 2009
Filing Date:
February 23, 2005
Export Citation:
Assignee:
KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
International Classes:
G01D5/353; G01B9/02; G01L1/24
Domestic Patent References:
| JP2001304823A | ||||
| JP2002250676A | ||||
| JP3031736A | ||||
| JP4077641A | ||||
| JP2000180265A | ||||
| JP2003098037A | ||||
| JP3930023B2 |
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto