公开(公告)号：WO2012038784A1

公开(公告)日：2012-03-29

申请号：PCT/IB2010/054997

申请日：2010-11-04

Applicant: INDIAN INSTITUTE OF SCIENCE ,  SUNDARRAJAN, Asokan ,  MADHAV, Kalaga Venu ,  RAHMAN, Aashia ,  SRINIVASAN, Balaji

Inventor： SUNDARRAJAN, Asokan ,  MADHAV, Kalaga Venu ,  RAHMAN, Aashia ,  SRINIVASAN, Balaji

IPC: G02B6/02 ,  G01K11/32 ,  G01L1/24

CPC classification number: G01K11/3206 ,  G01L1/246 ,  G02B6/02204

Abstract: A fiber Bragg grating cross-wire sensor may be used to independently determine strain and temperature variation. An example fiber Bragg grating cross-wire sensor comprises a first fiber Bragg grating (FBG) that reflects a first percentage, R 1 , of light of a first wavelength, λ 1 , and a second FBG that reflects a second percentage, R2, of light of a second wavelength, λ 2 . The second FBG is positioned orthogonal to the first FBG, and λ 1 is substantially equal to λ 2 , but R 1 is different from R 2 . As the FBG cross- wire sensor experiences a strain and/or a temperature variation, the wavelengths of light reflected by the first FBG and the second FBG will shift from the first and second wavelength, λ 1 and λ 2 , to first and second shifted wavelengths, λ A and λ T , respectively. Based on R 1 R 2 , λ 1 , λ A , and XT, the strain and/or the temperature variation may be independently determined..

Abstract translation: 可以使用光纤布拉格光栅交叉线传感器来独立地确定应变和温度变化。 示例性光纤布拉格光栅交叉线传感器包括第一光纤布拉格光栅（FBG），其反射第一波长λ1的第一百分比R1和反射光的第二百分比R2的第二FBG 的第二波长λ2。 第二FBG与第一FBG正交地定位，并且θ1基本上等于α2，但R1不同于R2。 当FBG交叉线传感器经受应变和/或温度变化时，由第一FBG和第二FBG反射的光的波长将从第一和第二波长λ1和λ2移位到第一和第二偏移 波长，ΔA和ΔT。 基于R1R2，α1，αA和XT，应变和/或温度变化可以独立地确定。