Simple sensing head geometry using fibre Bragg gratings for strain-temperature discrimination

被引：20
作者：
Frazao, O.
Marques, L.
Marques, J. M.
Baptista, J. M.
Santos, J. L.
机构：
[1] INESC, Porto Inst Engn Sist Computadores, P-4169007 Oporto, Portugal
[2] Univ Madeira, Dept Engn Math, Funchal, Portugal
[3] Univ Porto, Fac Ciencias, Dept Fis, P-4169007 Oporto, Portugal
来源：
OPTICS COMMUNICATIONS | 2007年 / 279卷 / 01期
关键词：
optical sensors; Bragg gratings;
D O I：
10.1016/j.optcom.2007.06.066
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this work, a simple sensing head geometry using fibre Bragg gratings for strain and temperature discrimination is presented. The sensing head geometry consists in one fibre with two FBGs bonded with a dummy optical fibre. Due to this new configuration, different strain sensitivities of the two FBGs are obtained (approximate to 65% difference), while temperature sensitivities remain the same. This difference in strain sensitivities is substantially larger than in all previously reported dual grating sensors. The obtained experimental errors were +/- 13.48 mu epsilon and +/- 2.44 degrees C, respectively. It is also demonstrated that this new configuration can be used as a temperature-independent strain sensor. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：68 / 71
页数：4
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