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Small diameter fiber Bragg gratings and applications

机译：小直径光纤布拉格光栅及其应用

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摘要

Small diameter optical fibers are preferred in sensing systems as they have less influence on mechanical performance of smart composite. The static and dynamic monitoring capabilities of the small-diameter fiber Bragg gratings (FBG) are experimentally studied in this paper. Firstly, a small-diameter FBG is used as a strain sensor. Secondly, a temperature sensor is fabricated using a specific FBG. Thirdly, a simple sensing system is proposed in order to discriminate temperature at sensing point. Finally, utilization of these small diameter FBGs for vibration monitoring is discussed. The experiments revealed that the central wavelengths of the small-diameter fiber Bragg gratings shift linearly with strain or temperature. The FBG is more sensitive than a thermocouple inside the thermostat. Acquisition and analysis of the dynamic signal indicates that the designed FBG can be used for dynamic signal monitoring.
机译：小直径光纤在传感系统中是首选，因为它们对智能复合材料的机械性能影响较小。本文通过实验研究了小直径光纤布拉格光栅（FBG）的静态和动态监控功能。首先，将小直径的FBG用作应变传感器。其次，使用特定的FBG制造温度传感器。第三，提出了一种简单的传感系统以区分传感点的温度。最后，讨论了利用这些小直径FBG进行振动监测。实验表明，小直径光纤布拉格光栅的中心波长随应变或温度线性变化。 FBG比恒温器内部的热电偶更敏感。动态信号的采集和分析表明，所设计的FBG可用于动态信号监视。

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