混凝土结构埋入式光纤应变传感器的耐用性解决方案
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摘要
埋入式光纤应变传感器在混凝土结构的健康监测中应用日益广泛,但其有效寿命远低于结构的使用寿命,不能实现对结构的全周期监测。基于可更换的思路,提出了一种新型的传感器设计方案,通过对老化的主要应变传感部件(光纤光栅、基底和传输光纤)进行更新来使应变监测得以长期连续进行,从而简便可靠地解决了埋入式光纤应变传感器的耐用性问题。
Embedded optical fiber strain sensors have been widely used in the health monitoring of concrete structures. However,the serviceable life of the sensors has been demonstrated significantly less than that of the concrete structure.Therefore,it is not possible for the sensors to monitor the strain within the whole life cycle of the structure.A new design aiming at the solution to this durability problem is presented,where the aged basic components of a strain sensor(optical fiber grating,substrate and transmission optical fiber)can be substituted by new ones.By using this new design,the durability problem of embedded optical fiber strain sensors was solved expediently and reliably.
Embedded optical fiber strain sensors have been widely used in the health monitoring of concrete structures. However,the serviceable life of the sensors has been demonstrated significantly less than that of the concrete structure.Therefore,it is not possible for the sensors to monitor the strain within the whole life cycle of the structure.A new design aiming at the solution to this durability problem is presented,where the aged basic components of a strain sensor(optical fiber grating,substrate and transmission optical fiber)can be substituted by new ones.By using this new design,the durability problem of embedded optical fiber strain sensors was solved expediently and reliably.
引文
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10 吴金生,杨瀛海,俞本立,黄伟同.影响光纤光栅温度传感器应用的两个主要因素[J],功能材料,1999,(4) :425-427
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14 赵雪峰,田石柱,周智,等.基于封装光纤光栅 Bragg 光栅传感器的混凝土应变监测试验研究[J].光学技术,2003,29(4) :423-426
2 Zhou G,Sim LM.Damage detection and assessment in fiber-reinforced composite structures with embedded fiber optic sensors-review.Smart Mater Struct 2002;11:925-939
3 Glisic B.,Inaudi D.,Kronenberg P.,vurpillot S,Dam monitoring using long SOFD sensors[A] ,Hydrepower conference,aqua media international[A],1999:709-717
4 de Oliveira R et al.,Health monitoring of composite structures by embedded FBG and interferometric Fabry-Pe' rot sensors,Computers and Structures(2007) ,doi:10． 1016/j.compstruc.2007． 01． 040
5 Casanova N.,Inaudi D.,Structural monitoring with embedded and surface mounted fiber optic sensors[A].ISMES,International colloquium seriate[C].1997:325-332
6 K.S.C.Kuang,R.Kenny,M.P.Whelan,W.J.Cantwell,P.R.Chalker,Embedded fiber Bragg grating sensors in advanced compasite materials,Composites Science and Technology 61 (2001) 1379-1387
7 李宏男,李东升,赵柏东,光纤光栅健康监测方法在土木工程中的研究与应用进展[J].地震工程与工程振动,2002,22(6) :76-83
8 P.Moyo,J.M.W.Brownjohn,R.Suresh,S.C.Tjin,Development of fiber Bragg grating sensors for monitoring civil infrastructure,Engineering Structures 27 (2005) 1828-1834
9 J.Botsis,L.Humbert,F.Colpo,P.Giaccari,Embedded fiber Bragg grating sensor for internal strain measurements in polymeric materials,Optics and Lasers in Engineering 43(2005) 491-510
10 吴金生,杨瀛海,俞本立,黄伟同.影响光纤光栅温度传感器应用的两个主要因素[J],功能材料,1999,(4) :425-427
11 郭风珍,于长泰,光纤光栅传感技术与应用[M].杭州:浙江大学出版社,1992
12 刘迎春.传感器原理、设计与应用[M].国防科技大学出版社,1988
13 何爱勇,程华.光纤光栅传感技术在结构工程检测中的应用[J],重庆工业高等专科学校学报,2002,17(2) :1-3
14 赵雪峰,田石柱,周智,等.基于封装光纤光栅 Bragg 光栅传感器的混凝土应变监测试验研究[J].光学技术,2003,29(4) :423-426
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