光纤光栅锈蚀传感器在不同湿度下的特性研究

钢结构的锈蚀监测对于钢结构安全的早期预警非常重要.本文提出了一种制备布喇格光纤光栅锈蚀传感器的方法，并研究了该传感器在不同湿度环境下的传感规律.结合磁控溅射和电镀的方法在光栅侧表面制备了Fe-C合金传感膜；利用扫描电子显微镜观察其侧表面形貌；检测在相对湿度60%和99%下中心波长的变化，进而分析该光纤光栅探头在不同湿度下的传感规律.实验和数据分析结果表明：在相对湿度为60%时，锈蚀进程缓慢，随着时间的推移波长呈线性化增加；相对湿度达到99%时光栅光谱出现多峰现象.据此得出：一定湿度条件下，该传感器可监测锈蚀进展；当环境湿度较高（达到99%）时，该传感器可用于锈蚀出现的早期预警.

Abstract

A prototype Fiber Bragg Gratings (FBG) sensor for monitoring corrosion of steel structures was presented and the performances were characterized at different humidities. The sensor was fabricated by sputtering and electroplating a sensitive metal film on FBG side-face. The surface micro-structures of sensor at different humidities were investigated by Scanning Electron Microscope during a 27-day experimental cycle. The shifting of wavelength was recorded by Optical Spectrometer Analyzer in two environments with humidity of 60% and 99% RH. The wavelength of FBG sensor at 60%RH increased linearly with an increment of 0.025 nm per day. For sensors at 99%RH, the chirping appears, which implies more serious corrosion occurs than that at 60% RH. The experimental results show that the proposed FBG corrosion sensor is applicable for corrosion monitoring at a humidity of lower than 60%RH, and applicable for early alert of corrosion at a higher humidity.

参考文献

[1] FUHR P L, HUSTON D R. Corrosion detection in reinforced concrete roadways and bridges via embedded fiber optic sensors［J］. Smart Materials and Structures, 1998, 7(2): 217-228.

[2] MONTEMOR M F, SIMES A M P, FERREIRA M G S. Chloride-induced corrosion on reinforcing steel: from the fundamentals to the monitoring techniques［J］. Cement and Concrete Composites, 2003, 25(4-5): 491-502.

[3] 姜德生, CLAUS R O. 智能材料-器件-结构与应用［M］. 武汉：武汉工业大学出版社, 1999.

[4] LEUNG C K Y,WAN K T, CHEN Li-quan. A novel optical fiber sensor for steel corrosion in concrete structures［J］. Sensors, 2008, 8(3): 1960-1976.

[5] WADE S A, WALLBRINK C D. A fibre optic corrosion fuse sensor using stressed metal-coated optical fibres［J］.Sensors and Actuators B, 2008, 131(2): 602-608.

[6] DONG Sa-ying. Optical and electrochemical measurements for optical fibre corrosion sensing techniques［J］. Corrosion Science, 2006, 48(7): 1746-1756.

[7] 严云,江毅,LENG C K Y.用光纤光栅测量混凝土中钢筋的腐蚀［J］.四川建筑科学研究,2005,31（6）:148-151.

YAN Yun, JIANG Yi, LENG C K Y. To measure the corrosion of the rebar embedded in concrete structures by optical fiber grating［J］. Sichuan Building Science, 2005, 31（6）: 148-151.

[8] 阳莎,耿健新,叶青,等.光纤光栅在金属锈蚀传感中的应用［J］.中国激光,2006,533(5):641-644.

YANG Sha, GENG Jian-xin, YE Qing, et al. Application fi fiber bragg gratings in monitoring metal corrosion［J］. Chinese Journal of Lasers, 2006, 533(5): 641-644.

[9] 刘巧玲.混凝土中钢筋腐蚀的电化学机理及监测技术研究［J］.建筑安全,2009,24(3):59-60.

LIU Qiao-ling. The Electrochemical mechanism of the corrosion of the rebar embedded in concrete and monitoring technology［J］. Construction Safety, 2009, 24(3): 59-60.

[10] 黎学明, 陈伟民, 黄宗卿, 等.光纤传感器对混凝土结构钢筋腐蚀监测的研究［J］. 光电子·激光, 2001, 12(10):1037-1040.

LI Xue-ming, CHEN Wei-min, HUANG Zong-qin, et al. Experimental research of fiber optic corrosion sensor in reinforced concrete［J］. Journal of Optoelectronics·Laser, 2001, 12(10): 1037-1040.

[11] HU W, CAI H, YANG M, et al. Fe-C-coated fibre Bragg grating sensor for steel corrosion monitoring［J］. Corrosion Science, 2011, 53(5): 1933-1938.

蔡汉莉, 胡文彬, 张艳晓, 丁莉芸, 陈伟. 光纤光栅锈蚀传感器在不同湿度下的特性研究[J]. 光子学报, 2011, 40(5): 690. CAI Han-li, HU Wen-bin, ZHANG Yan-xiao, DING Li-yun, CHEN Wei. A Fiber Bragg Grating Sensor of Steel Corrosion at Different Humidities[J]. ACTA PHOTONICA SINICA, 2011, 40(5): 690.

光纤光栅锈蚀传感器在不同湿度下的特性研究

关于本站 Cookie 的使用提示

全站搜索

光纤光栅锈蚀传感器在不同湿度下的特性研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索