Research on the Durability of Metal-Packaged Fiber Bragg Grating Sensors

被引:35
作者
Guo, Yongxing [1 ,2 ]
Xiong, Li [1 ,2 ]
Liu, Honghai [3 ]
机构
[1] Wuhan Univ Sci & Technol, Minist Educ, Key Lab Met Equipment & Control Technol, Wuhan 430081, Hubei, Peoples R China
[2] Wuhan Univ Sci & Technol, Hubei Key Lab Mech Transmiss & Mfg Engn, Wuhan 430081, Hubei, Peoples R China
[3] Shanghai Jiao Tong Univ, Sch Mech Engn, State Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China
基金
中国国家自然科学基金;
关键词
Fiber Bragg grating (FBG); FBG sensors; metal packaging; durability; HYDROGEN SENSOR; COMPOSITE FILM; PERFORMANCE;
D O I
10.1109/LPT.2019.2900069
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Compared to conventional adhesive packaging for fiber Bragg grating (FBG) sensors, metal packaging is considered a new and robust method with excellent advantages such as stability and resistance to high and low temperatures. Current research mainly focuses on metal coating methods, the enhancement of temperature sensing characteristics, and the method of welding onto the substrate. However, the durability of the metal packaging, which determines the measurement accuracy and lifetime of a metal-coated FBG sensor, has been ignored. This letter introduces our long-term investigation of the durability of three metal-packaged FBG sensors over the past four years. The metal packaging process for the bare FBGs and sensor substrates, the experimental design, and the test methods are presented. The research results show that the central wavelength of a prestretched metallized FBG decreases due to natural aging after 10 months and that its sensing capabilities, such as its negative strain detection capacity, sensitivity, linearity, and repeatability, significantly degrade after 48 months, revealing a deficiency in our current understanding.
引用
收藏
页码:525 / 528
页数:4
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