| 一种基于级联长周期光纤光栅的力传感装置 |
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| 引用本文： | 郑晶晶 张玲芬.一种基于级联长周期光纤光栅的力传感装置[J].宁波大学学报(理工版),2017,0(4):78-81. |
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| 作者姓名： | 郑晶晶 张玲芬 |
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| 作者单位： | 宁波大学 理学院, 浙江 宁波 315211 |
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| 摘 要： | 利用光纤布拉格光栅(FBG)具有谱线窄、反射率高的特性和级联长周期光纤光栅(级联LPFG)的边沿滤波特性, 设计了一种基于级联LPFG的力传感装置, 将拉力变化转变为FBG反射谱功率的变化. 在理论上分析了实验的可行性, 用光纤光栅刻写系统制作了符合要求的级联LPFG和FBG, 用光谱分析仪对FBG的反射谱进行了监测. 用光纤功率计对FBG的反射功率进行了测量, 并对测得的数据进行了线性拟合, 其线性相关系数为0.9924, 装置的灵敏度为1.074μW?N-1. 在拉力为0~0.6N的范围内功率与拉力有较好的线性关系. 测量范围和灵敏度取决于级联LPFG透射谱边沿的斜率. 该装置结构简单, 操作方便.
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| 关 键 词： | 长周期光纤光栅 光纤布拉格光栅 边沿滤波 解调 力传感 |
A force sensing device based on cascaded long period fiber grating |
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| ZHENG Jing-jing,ZHANG Ling-fen.A force sensing device based on cascaded long period fiber grating[J].Journal of Ningbo University(Natural Science and Engineering Edition),2017,0(4):78-81. |
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| Authors: | ZHENG Jing-jing ZHANG Ling-fen |
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| Affiliation: | Faculty of Science, Ningbo University, Ningbo 315211, China |
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| Abstract: | Using the narrow band, high reflectivity of fiber Bragg grating (FBG) and the edge filter of cascaded long period fiber grating (LPFG), a force sensing device based on cascaded LPFG is presented. The variation of force is transformed into the power changes of FBG reflection spectrum. The feasibility of the experiment was analyzed. The cascaded LPFG and FBG meeting requirement are made using the fiber grating fabrication system. The FBG reflection spectrum has been monitored using a spectrum analyzer. The FBG reflection power has been measured using the power meter. The linear fitting is conducted and the correlation coefficient is found to be 0.9924 and the sensitivity be 1.074μW?N-1. It manifests a good linearity between power and force in range of 0-0.6N. The measuring range of force and sensitivity depends on the edge slope of the cascaded LPFG transmission spectrum. The device is structured in simplicity and handy to operate. |
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| Keywords: | long period fiber grating fiber Bragg grating edge filtering demodulation force sensing |
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