材料科学
光纤布拉格光栅
焊接
复合材料
灵敏度(控制系统)
极限抗拉强度
拉伤
胶粘剂
结构健康监测
光电子学
电子工程
波长
医学
内科学
工程类
图层(电子)
作者
Yumin Zhang,Lianqing Zhu,Fei Luo,Mingli Dong,Runtao Yang,Wei He,Xiaoping Lou
出处
期刊:IEEE Sensors Journal
[Institute of Electrical and Electronics Engineers]
日期:2016-08-01
卷期号:16 (15): 5958-5963
被引量:21
标识
DOI:10.1109/jsen.2016.2577610
摘要
A feasible metallic packaging technique of fiber Bragg grating (FBG) sensors is developed for measurement of strain, and it can be simply achieved via one-step ultrasonic welding. The strain transfer coefficient of the FBG sensor is theoretically evaluated by a proposed model aiming at determining the proper packaging parameters of a surface-bonded FBG sensor. According to analytical results, the metallic packaging shows higher strain transfer coefficient compared with traditional adhesive packaging under the same conditions. Comparisons of the experimental results with the numerical predictions for the strain sensitivity show a satisfactory agreement. Experimental strain tests are performed on an elaborate uniform strength beam for both tensile and compressive strain, and the strain sensitivity of ~1.26 and 1.34 pm/με is obtained for the tensile and compressive situation, respectively. The results of comparison demonstrate that the metal-packaged FBG sensor has a certain advantage in respect of strain measurement in specific sensing field, such as long-term, high-precision, and harsh-environment structural health monitoring.
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