文献类型：期刊文献

英文题名：An Improved Metal-Packaged Strain Sensor Based on A Regenerated Fiber Bragg Grating in Hydrogen-Loaded Boron-Germanium Co-Doped Photosensitive Fiber for High-Temperature Applications

作者：Tu, Yun[1];Ye, Lin[2];Zhou, Shao-Ping[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Ctr Adv Mat Technol, Lab Smart Mat & Struct, Sydney, NSW 2006, Australia

年份：2017

卷号：17

期号：3

外文期刊名：SENSORS

收录：;EI(收录号：20170903407617);WOS:【SCI-EXPANDED(收录号:WOS:000398818700004)】；

基金：The authors would like to acknowledge the financial supports provided by the National Natural Science Foundation of China ( Nos. 51505150 and 11472105), the Natural Science Foundation of Shanghai ( No. 15ZR1409100), the China Postdoctoral Science Foundation ( No. 2015M580298), the Fundamental Research Funds for the Central Universities (No. WG1514032), and the 111 Project ( No. B13020).

语种：英文

外文关键词：regenerated fiber Bragg grating (RFBG); metal-packaged; strain sensor; photosensitive fiber; high temperature; strength degradation; structural health monitoring

摘要：Local strain measurements are considered as an effective method for structural health monitoring of high-temperature components, which require accurate, reliable and durable sensors. To develop strain sensors that can be used in higher temperature environments, an improved metal-packaged strain sensor based on a regenerated fiber Bragg grating (RFBG) fabricated in hydrogen (H-2)-loaded boron-germanium (B-Ge) co-doped photosensitive fiber is developed using the process of combining magnetron sputtering and electroplating, addressing the limitation of mechanical strength degradation of silica optical fibers after annealing at a high temperature for regeneration. The regeneration characteristics of the RFBGs and the strain characteristics of the sensor are evaluated. Numerical simulation of the sensor is conducted using a three-dimensional finite element model. Anomalous decay behavior of two regeneration regimes is observed for the FBGs written in H-2-loaded B-Ge co-doped fiber. The strain sensor exhibits good linearity, stability and repeatability when exposed to constant high temperatures of up to 540 degrees C. A satisfactory agreement is obtained between the experimental and numerical results in strain sensitivity. The results demonstrate that the improved metal-packaged strain sensors based on RFBGs in H-2-loaded B-Ge co-doped fiber provide great potential for high-temperature applications by addressing the issues of mechanical integrity and packaging.