分布式光纤传感器应变传递规律研究
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摘要
基于光频域反射技术,建立一种应变传递模型,推导了光纤应变传递关系,分析了分布式光纤应变测量结果的影响因素。通过等强度梁弯曲实验,分别从粘贴长度和涂覆层剪切模量等方面研究了光纤传感器的测量结果。研究结果表明,粘贴长度越长,应变传递率越高,当粘贴长度达到一定值时,光纤中间区域的应变传递率为1,两端的逐渐减小,涂覆层和胶粘剂的剪切模量越高,应变传递率越大。工程应用中应选用剪切模量高的涂覆层光纤及胶粘剂,粘贴长度应大于需测量区域的长度。
Based on the optical frequency domain reflection technology, we establish a strain transfer model, derive the strain transfer relationship of fiber, and analyze the influencing factors of the distributed fiber strain measurement results. Through the equal-strength beam bending experiment, we study the measurement results of the fiber-optic sensor from the aspects of the adhesion length and the shear modulus of the coating layer. The results show that the longer the adhension length, the higher the strain transfer rate. When the adhesion length reaches a certain level, the strain transfer rate in the middle of the optical fiber is 1, and those of the both ends are gradually reduced. The higher the shear modulus of the coating layer and the adhesive, the greater the strain transfer rate. Therefore, coating fibers and adhesives with high shear modulus should be used in engineering applications, and the adhesion length should be greater than the length of the area to be measured.
Based on the optical frequency domain reflection technology, we establish a strain transfer model, derive the strain transfer relationship of fiber, and analyze the influencing factors of the distributed fiber strain measurement results. Through the equal-strength beam bending experiment, we study the measurement results of the fiber-optic sensor from the aspects of the adhesion length and the shear modulus of the coating layer. The results show that the longer the adhension length, the higher the strain transfer rate. When the adhesion length reaches a certain level, the strain transfer rate in the middle of the optical fiber is 1, and those of the both ends are gradually reduced. The higher the shear modulus of the coating layer and the adhesive, the greater the strain transfer rate. Therefore, coating fibers and adhesives with high shear modulus should be used in engineering applications, and the adhesion length should be greater than the length of the area to be measured.
引文
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[10] Li H,Zhu L Q,Liu F,et al.Strain transfer analysis and experimental research of surface-bonded bare FBG[J].Chinese Journal of Scientific Instrument,2014,35(8):1744-1750.李红,祝连庆,刘锋,等.裸光纤光栅表贴结构应变传递分析与实验研究[J].仪器仪表学报,2014,35(8):1744-1750.
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[13] Wang W,Lin Y C,Huang Y G.Research on strain transferring of surface FBG sensor[J].Laser & Infrared,2008,38(12):1218-1220.王为,林玉池,黄银国.表面式光纤光栅传感器应变传递研究[J].激光与红外,2008,38(12):1218-1220.
[14] Guo W,Li X L,Song H.Analysis of strain transfer of fiber grating sensors adhered to the structure surface[J].Metrology & Measurement Technology,2011,31(4):1-4.郭伟,李新良,宋昊.表面粘贴光纤光栅传感器的应变传递分析[J].计测技术,2011,31(4):1-4.
[15] Huang X D,Wang Y,Sun Y Y,et al.Mechanism analysis on the impact of coating to fiber Bragg grating strain transfer[J].Chinese Journal of Scientific Instrument,2016,37(6):1233-1240.黄肖迪,王源,孙阳阳,等.涂覆层对光纤布拉格光栅应变传递的影响机理分析[J].仪器仪表学报,2016,37(6):1233-1240.
[16] Sun Y Y,Wang Y,Zhang Z L,et al.Analysis and experimental research on the principle of surface bonded FBG strain transfer[J].Journal of Functional Materials,2016,47(7):7046-7050,7055.孙阳阳,王源,章征林,等.表面粘贴式光纤布拉格光栅应变传递规律分析与实验研究[J].功能材料,2016,47(7):7046-7050,7055.
[17] Zhang Z L,Wang Y,Sun Y Y,et al.Influence of adhesive on surface-bonded FBG sensor strain transfer coefficient[J].Acta Materiae Compositae Sinica,2016,33(11):2537-2542.章征林,王源,孙阳阳,等.胶粘剂对表贴式FBG传感器应变传递系数的影响[J].复合材料学报,2016,33(11):2537-2542.
[18] Liu Q S,Wang J T,Xiao L G,et al.Application of OFDR-based sensing technology in geo-mechanical model test on tunnel excavation using cross rock pillar method[J].Chinese Journal of Rock Mechanics and Engineering,2017,36(5):1063-1075.刘泉声,王俊涛,肖龙鸽,等.OFDR光纤传感技术在十字岩柱暗挖法物理模型试验中的应用[J].岩石力学与工程学报,2017,36(5):1063-1075.
[19] Yang S,Li J,Xu S M,et al.Strain transferring analysis of surface FBG sensor based on uniform cantilever beam[J].Optics & Optoelectronic Technology,2017,15(2):28-34.杨爽,李俊,徐胜明,等.等截面悬臂梁FBG传感器应变传递规律研究[J].光学与光电技术,2017,15(2):28-34.
[2] Liu K,Feng B W,Liu T G,et al.Continuous distributed fiber strain location sensing based on optical frequency domain reflectometry[J].Chinese Journal of Lasers,2015,42(5):0505006.刘琨,冯博文,刘铁根,等.基于光频域反射技术的光纤连续分布式定位应变传感[J].中国激光,2015,42(5):0505006.
[3] Kim S H,Lee J J,Kwon l B.FEM analysis of surface-mounted distributed optical fiber sensors[J].Proceedings of SPIE,2001,4317:211-216.
[4] Ansari F,Yuan L B.Mechanics of bond and interface shear transfer in optical fiber sensors[J].Journal of Engineering Mechanics,1998,124(4):385-394.
[5] Zhou Z,Li J L,Ou J P.Interface strain transfer mechanism and error modification of embedded FBG strain sensors[J].Journal of Harbin Institute of Technology,2006,38(1):49-55.周智,李冀龙,欧进萍.埋入式光纤光栅界面应变传递机理与误差修正[J].哈尔滨工业大学学报,2006,38(1):49-55.
[6] Li H N,Zhou G D,Ren L,et al.Strain transfer coefficient analyses for embedded fiber Bragg grating sensors in different host materials[J].Journal of Engineering Mechanics,2009,135(12):1343-1353.
[7] Li D S,Li H N.Strain transferring analysis of embedded fiber Bragg grating sensors[J].Chinese Journal of Theoretical and Applied Mechanics,2005,37(4):435-441.李东升,李宏男.埋入式封装的光纤光栅传感器应变传递分析[J].力学学报,2005,37(4):435-441.
[8] Zhang Z L,Wang Y,Sun Y Y,et al.Analysis and experimental study on the strain transfer mechanism of an embedded basalt fiber-encapsulated fiber Bragg grating sensor[J].Optical Engineering,2017,56(1):017105.
[9] Tian S Z,Zhang G Q,Wang D P.Study on strain transfer mechanism of surface fiber Bragg grating sensor[J].Chinese Journal of Lasers,2014,41(8):0805005.田石柱,张国庆,王大鹏.表面式光纤布拉格光栅传感器应变传递机理的研究[J].中国激光,2014,41(8):0805005.
[10] Li H,Zhu L Q,Liu F,et al.Strain transfer analysis and experimental research of surface-bonded bare FBG[J].Chinese Journal of Scientific Instrument,2014,35(8):1744-1750.李红,祝连庆,刘锋,等.裸光纤光栅表贴结构应变传递分析与实验研究[J].仪器仪表学报,2014,35(8):1744-1750.
[11] Zhao H T,Wang Q B,Qiu Y,et al.Strain transfer of surface-bonded fiber Bragg grating sensors for airship envelope structural health monitoring[J].Journal of Zhejiang University Science A,2012,13(7):538-545.
[12] Wu R J,Zheng B L,Fu K K,et al.Influence of layered structure for surface-bonded FBG sensor on measured strain[J].Optics and Precision Engineering,2014,22(12):3183-3190.吴入军,郑百林,付昆昆,等.表面粘贴式光纤布拉格光栅传感器层状结构对测量应变的影响[J].光学精密工程,2014,22(12):3183-3190.
[13] Wang W,Lin Y C,Huang Y G.Research on strain transferring of surface FBG sensor[J].Laser & Infrared,2008,38(12):1218-1220.王为,林玉池,黄银国.表面式光纤光栅传感器应变传递研究[J].激光与红外,2008,38(12):1218-1220.
[14] Guo W,Li X L,Song H.Analysis of strain transfer of fiber grating sensors adhered to the structure surface[J].Metrology & Measurement Technology,2011,31(4):1-4.郭伟,李新良,宋昊.表面粘贴光纤光栅传感器的应变传递分析[J].计测技术,2011,31(4):1-4.
[15] Huang X D,Wang Y,Sun Y Y,et al.Mechanism analysis on the impact of coating to fiber Bragg grating strain transfer[J].Chinese Journal of Scientific Instrument,2016,37(6):1233-1240.黄肖迪,王源,孙阳阳,等.涂覆层对光纤布拉格光栅应变传递的影响机理分析[J].仪器仪表学报,2016,37(6):1233-1240.
[16] Sun Y Y,Wang Y,Zhang Z L,et al.Analysis and experimental research on the principle of surface bonded FBG strain transfer[J].Journal of Functional Materials,2016,47(7):7046-7050,7055.孙阳阳,王源,章征林,等.表面粘贴式光纤布拉格光栅应变传递规律分析与实验研究[J].功能材料,2016,47(7):7046-7050,7055.
[17] Zhang Z L,Wang Y,Sun Y Y,et al.Influence of adhesive on surface-bonded FBG sensor strain transfer coefficient[J].Acta Materiae Compositae Sinica,2016,33(11):2537-2542.章征林,王源,孙阳阳,等.胶粘剂对表贴式FBG传感器应变传递系数的影响[J].复合材料学报,2016,33(11):2537-2542.
[18] Liu Q S,Wang J T,Xiao L G,et al.Application of OFDR-based sensing technology in geo-mechanical model test on tunnel excavation using cross rock pillar method[J].Chinese Journal of Rock Mechanics and Engineering,2017,36(5):1063-1075.刘泉声,王俊涛,肖龙鸽,等.OFDR光纤传感技术在十字岩柱暗挖法物理模型试验中的应用[J].岩石力学与工程学报,2017,36(5):1063-1075.
[19] Yang S,Li J,Xu S M,et al.Strain transferring analysis of surface FBG sensor based on uniform cantilever beam[J].Optics & Optoelectronic Technology,2017,15(2):28-34.杨爽,李俊,徐胜明,等.等截面悬臂梁FBG传感器应变传递规律研究[J].光学与光电技术,2017,15(2):28-34.
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