塑料光纤在裂缝监测中的性能

针对普通石英光纤质地较脆,应用在结构裂缝监测中易发生断裂的现象,本文运用塑料光纤代替普通石英光纤进行结构裂缝监测,并且考虑复合材料裂缝开裂方向的不确定性,对塑料光纤及其裂缝监测能力进行了研究.设计了一套塑料光纤传感装置,并通过裂缝模拟装置来研究塑料光纤分别与裂缝呈30°、45°、60°夹角时,光损耗与裂缝开度的关系.实验结果表明,随着裂缝的开展,光损耗逐渐增加;纤芯直径为0.5 mm时最大光损耗幅值为78.76 μW,而纤芯直径为0.25 mm时,最大光损耗幅值只有24.28 μW,纤芯直径较大的光纤在微弯时易发生较大的光损耗.塑料光纤传感装置在结构裂缝监测中应用是可行性的,而且塑料光纤裂缝传感器的灵敏性随着方位角的增加而降低.

Abstract

Ordinary silica fibers are easy to break in real applications due to their characteristics of brittleness. Plastic optical fibers were proposed to replace silica fibers in crack monitoring. Moreover,considering the uncertainty of crack propagation direction in composite materials,the influence of the angles between plastic optical fibers and cracks was studied. A set of plastic optical fiber sensing device was designed and the relationship between optical loss and crack width under different fiber/crack angles was measured through the device. The results show that the optical loss in plastic optical fibers increased gradually with crack propagation. Therefore,applying plastic optical fibers in crack monitoring is feasible and the sensitivity of plastic optical fiber crack sensors decreases with the increasing of fiber/crack angles. Moreover,from the experimental results,the maximum optical loss of 0.5mm plastic optical fibers is 78.76 μW,while the maximum optical loss of 0.25 mm plastic optical fibers is only 24.28 μW. Therefore,the fibers with bigger diameter have more bend loss when they are bent.

参考文献

[1] SHAH A A,RIBAKOV Y,HIROSE S. Nondestructive evaluation of damaged concrete using nonlinear ultrasonics［J］. Materials & Design,2009,30(3): 775-782.

[2] DEGALA S,RIZZO P,RAMANATHAN K,et al. Acoustic emission monitoring of CFRP reinforced concrete slabs［J］. Construction and Building Materials,2009,23(5): 2016-2026.

[3] MORI K,SPAGNOLI A,MURAKAMI Y,et al. A new non-contacting non-destructive testing method for defect detection in concrete［J］. NDT & E International,2002,35(6): 399-406.

[4] CHENG C C,CHENG T M,CHIANG C H. Defect detection of concrete structures using both infrared thermography and elastic waves［J］. Automation in Construction,2008,18(1): 87-92.

[5] HUSTON D,HU J Q,MASER K,et al. GIMA ground penetrating radar system for monitoring concrete bridge decks［J］. Journal of Applied Geophysics,2000,43(2): 139-146.

[6] ROSSI P,LE MAOU F. New method for detecting cracks in concrete using fibre optics［J］. Materials and Structures,1989,22(6): 437-442.

[7] ANSARI F,NAVALURKAR R K. Kinematics of crack formation in cementitious composites by fiber optics［J］. Journal of Engineering Mechanics,1993,119(5): 1048-1061.

[8] LI Q,LI G,WANG G,et al. CTOD measurement for cracks in concrete by fiber optic sensors［J］. Optics and Lasers in Engineering,2004,42(4): 377-388.

[9] ZHANG W,SHI B,ZHANG Y F,et al. The strain field method for structural damage identification using Brillouin optical fiber sensing［J］. Smart Materials and Structures,2007,16(3): 843-850.

[10] BAO T. Distributed fiber bragg grating sensors for monitoring cracks in concrete structures［C］. Proceedings of the 13th International Conference on Engineering,Science,Construction,and Operations in Challenging Environments-Earth and Space,2012: 1390-1399.

[11] LEUNG C K Y,ELVIN N,OLSON N,et al. A novel distributed optical crack sensor for concrete structures［J］. Engineering Fracture Mechanics,2000,65(2): 133-148.

[12] LARGE M C J,MORAN J,YE L. The role of viscoelastic properties in strain testing using microstructured polymer optical fibres［J］. Measurement Science and Technology,2009,20(3): 1-6.

[13] HUSDI I R,NAKAMURA K,UEHA S. Sensing characteristics of plastic optical fibres measured by optical time-domain reflectometry［J］. Measurement Science and Technology,2004,15(8): 1553-1559.

[14] BABCHENKO A,WEINBERGER Z,ITZKOVICH N,et al. Plastic optical fibre with structural imperfections as a displacement sensor［J］. Measurement Science and Technology,2006,17(5): 1157-1161.

[15] TAKEDA N,KOSAKA T,ICHIYAMA T. Detection of transverse cracks by embedded plastic optical fiber in FRP laminates［C］//1999 Symposium on Smart Structures and Materials. International Society for Optics and Photonics,1999: 248-255.

[16] WONG Y M,SCULLY P J,BARTLETT R J,et al. Plastic optical fibre sensors for environmental monitoring: biofouling and strain applications［J］. Strain,2003,39(3): 115-119.

[17] NAKAMURA K,HUSDI I R,UEHA S. Memory effect of POF distributed strain sensor［C］//Second European Workshop on Optical Fibre Sensors. International Society for Optics and Photonics,2004: 144-147.

[18] KREBBER K,LENKE P,LIEHR S,et al. Smart technical textiles with integrated POF sensors［C］//The 15th International Symposium on: Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring. International Society for Optics and Photonics,2008: 69330V-69330V-15.

[19] KUANG K S C,CANTWELL W J,THOMAS C. Crack detection and vertical deflection monitoring in concrete beams using plastic optical fibre sensors［J］. Measurement Science and Technology,2003,14(2): 205-216.

[20] KUANG K S C. Development of a wireless,self-sustaining damage detection sensor system based on chemiluminescence for structural health monitoring［C］//SPIE Smart Structures and Materials+ Nondestructive Evaluation and Health Monitoring. International Society for Optics and Photonics,2014: 906208-906208-8.

[21] LIEHR S,LENKE P,WENDT M,et al. Polymer optical fiber sensors for distributed strain measurement and application in structural health monitoring［J］. Sensors Journal,2009,9(11): 1330-1338.

[22] LIEHR S,BURGMEIER J,KREBBER K,et al. Fiber optic bend and temperature sensing in femtosecond laser-structured POF［C］//OFS2012 22nd International Conference on Optical Fiber Sensor. International Society for Optics and Photonics,2012: 84213I-84213I-4.

[23] 廖延彪.光纤光学—原理与应用［M］.北京:清华大学出版社.2010.

[24] OLSON N,LEUNG C K Y,MENG A. Crack sensing with a multimode fiber: experimental and theoretical studies［J］. Sensors and Actuators A: Physical,2005,118(2): 268-277.

包腾飞, 赵津磊, 戚丹. 塑料光纤在裂缝监测中的性能[J]. 光子学报, 2015, 44(10): 1006001. BAO Teng-fei, ZHAO Jin-lei, QI Dan. Properties of Plastic Optical Fibers in Crack Monitoring[J]. ACTA PHOTONICA SINICA, 2015, 44(10): 1006001.

塑料光纤在裂缝监测中的性能

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