A displacement measuring device and a displacement instrumentation method

Japanese Patent JP6159095

B2

Displacement measuring device with light irradiation system, first and second FBGs and detecting system. The first FBG has first transmittance distribution or first reflectance distribution. The second FBG has second transmittance distribution or second reflectance distribution. The detecting system detects light passed through the first and second FBGs of which at least one of the first transmittance distribution and the second transmittance distribution changes in a wavelength direction with a change amount different from that of the other, according to a displacement amount of an object, or amplitude of the light passed through the first and the second FBGs of which at least one of the first reflectance distribution and the second reflectance distribution changes in the wavelength direction with a change amount different from that of the other, according to the displacement amount of the object, and acquires an index to indicate the displacement amount based on the amplitude.

Soejima Hideki
Yoji Okabe
Wu
Hiroko Odo
Ryujiro Nomura

JP2013020928A

July 05, 2017

February 05, 2013

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Subaru corporation
Fujikura Ltd.
National University Corporation Tokyo University

G01B17/00; G01N29/14

JP2006029995A
JP2009260487A
JP2010112867A
JP2007232371A
JP2005315635A

US20120216615

D.Gatti, G.Galzerano, D.Janner, S.Longhi, and P.Laporta,Fiber strain sensor based on a π-phase-shifted Bragg grating and the Pound-Drever-Hall technique,Optics Express,2008年,Vol.16, Issue 3,pp.1945-1950

Takehiko Yamada

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