FBG应变传感器的动态特性及其应用范围
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摘要
通过对应变波的传播过程分析,研究了FBG(F iber B ragg G rating)应变传感器的动态特性,给出了应变波传递到裸FBG上的滞后时间,估算了FBG应变传感器的最高工作频率,并将自行封装的FBG应变传感器粘贴于海底管线模型上进行了振动台试验,结果表明,FBG应变传感器适用于低频振动系统的监测需要,在对低频振动系统的监测中具有良好的工作性能。
this paper investigates dynamic characteristics of a Fiber Bragg Grating(FBG) strain sensor by analyzing transmit course of strain waves,and gives the lag time for strain waves to transfer to bare FBG.The highest working frequency of FBG is also estimated.The result shows that the FBG strain sensor is applicable to the measurement of low frequency vibration in engineering.In the end,FBG strain sensors are sticked on an offshore pipeline model for a shake table test and the result shows their good capability in monitoring dynamic characteristics of vibration systems with low frequency.
this paper investigates dynamic characteristics of a Fiber Bragg Grating(FBG) strain sensor by analyzing transmit course of strain waves,and gives the lag time for strain waves to transfer to bare FBG.The highest working frequency of FBG is also estimated.The result shows that the FBG strain sensor is applicable to the measurement of low frequency vibration in engineering.In the end,FBG strain sensors are sticked on an offshore pipeline model for a shake table test and the result shows their good capability in monitoring dynamic characteristics of vibration systems with low frequency.
引文
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9 H ideak i Iwak i,H irosh i Yam akawa,Ke iji Sh iba,Ak ira M ita.Structural health mon itoring system using FBG-based sensors fora dam age tolerant bu ild ing.3thInternationalW orkshop on Struc-tural Health Mon itoring.Stanford Un iversity,Sep.12—14,2001
10刘迎春.传感器设计原理—设计与应用[M].长沙:国防科技大学出版社,1989
11李科杰.传感原理[M].北京:北京理工大学出版社,1989
12周晶,李昕,马恒春,朱彤.地震时海底悬跨管道动力特性试验研究.水利学报.2003,1∶12—16
2李德葆.实验应变/应力模态分析若干问题的进展评述.振动与冲击.1996,15(1):14—18
3陆秋海,李德葆.模态理论的进展.力学进展.1996,26(4):464—472
4李宏男,李东升,赵柏东.光纤健康监测方法在土木工程中的研究与应用进展.地震工程与工程振动,2002,22(6):76—83
5 L iHongnan,L i Dongsheng,Song Gangb ing.Recent app licationsof fiber optic sensors to health mon itoring in c ivil engineerg,AnInternational Journal,Engineering Structures,2004,26(11):1647—1657
6姜德生.智能材料与结构、器件[M].武汉:武汉工业大学出版社,2000
7梁磊,罗裴,周雪芳等.光纤B ragg光栅传感技术应用于应变模态检测.河南科技大学学报.2003,24(3):54—57
8周智.土木工程结构光栅智能传感元件及其监测系统:[学位论文].哈尔滨:哈尔滨工业大学,2003
9 H ideak i Iwak i,H irosh i Yam akawa,Ke iji Sh iba,Ak ira M ita.Structural health mon itoring system using FBG-based sensors fora dam age tolerant bu ild ing.3thInternationalW orkshop on Struc-tural Health Mon itoring.Stanford Un iversity,Sep.12—14,2001
10刘迎春.传感器设计原理—设计与应用[M].长沙:国防科技大学出版社,1989
11李科杰.传感原理[M].北京:北京理工大学出版社,1989
12周晶,李昕,马恒春,朱彤.地震时海底悬跨管道动力特性试验研究.水利学报.2003,1∶12—16
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