结构健康监测
重复性
灵敏度(控制系统)
线性
校准
流离失所(心理学)
光纤布拉格光栅
材料科学
准确度和精密度
波长
结构工程
光学
声学
电子工程
工程类
物理
数学
光电子学
统计
心理治疗师
心理学
作者
Chuang Li,Li Sun,Ziqiang Xu,Xiangxiang Wu,Tianqi Liang,Weixing Shi
标识
DOI:10.1142/s0219455420400118
摘要
High precision structural displacement monitoring is challenging, but an effective method for structural health monitoring and particularly damage evaluation. In this paper, a high precision fiber Bragg grating (FBG) displacement sensor with embedded spring is developed to monitor structural displacement variation even at very small ranges. The principle of such monitoring is based on the central wavelength shifts in accordance with the displacement between measuring points. Calibration experiments are conducted to examine the performance of the innovative displacement sensor. The result indicates that the sensor has excellent linearity and repeatability, with the sensitivity coefficient being 23.96[Formula: see text]pm/mm, and the static relative error is 4.94% after three loading and unloading cycles. The displacement sensor therefore shows an excellent sensitivity and high precision for application. Moreover, it has been verified that this sensor is suitable and applicable for displacement monitoring in quasi-static experiment of structures.
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