变宽度悬臂梁的FBG流速传感器
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摘要
通过对光纤传感器进行设计,提出了一种基于变宽度悬臂梁的光纤(Bragg)光栅(FBG)流速传感器。传感部分由不锈钢材质的悬臂梁和粘贴在其特定位置上的FBG构成,悬臂梁采用等腰梯形和矩形相结合的外形结构设计,传感头两部分之间的衔接不需要用销子固定,整个传感头浑然一体,无额外附加重量,制作方法简易,且实验设置参考光栅,实验结果不受温度变化的影响。实验表明:传感器的Bragg波长漂移量与流速变化有很好的线性关系,传感器的灵敏度为0.025 m/s。可测流速范围为0~2 m/s,传感器不仅实现了对温度的补偿,而且提高了测量精度、灵敏度。
A fiber Bragg grating( FBG) flow velocity sensor based on cantilever with variable width is proposed. By design,the flow velocity sensor which induces the cantilever structure which is made of stainless steel materials and FBG which is tied in the special space of the cantilever. The cantilever structure consists of rectangle and trapezoid and the two parts do not need peg to fix them on,the head of the designed sensor do not need to add any other weight,and the fabrication method is easy. These is a reference FBG,and the experimental results are not affected by temperature changes. Experimental results indicate that there exist a good linear relationship between the drifting of the wavelength of the FBG and flow velocity. Sensitivity of the proposed sensor is,and the measuring range of flow velocity sensor is 0~ 2 m/s approximately. The sensor not only realize compensation of temperature,but also improve measurement precision and sensitivity.
A fiber Bragg grating( FBG) flow velocity sensor based on cantilever with variable width is proposed. By design,the flow velocity sensor which induces the cantilever structure which is made of stainless steel materials and FBG which is tied in the special space of the cantilever. The cantilever structure consists of rectangle and trapezoid and the two parts do not need peg to fix them on,the head of the designed sensor do not need to add any other weight,and the fabrication method is easy. These is a reference FBG,and the experimental results are not affected by temperature changes. Experimental results indicate that there exist a good linear relationship between the drifting of the wavelength of the FBG and flow velocity. Sensitivity of the proposed sensor is,and the measuring range of flow velocity sensor is 0~ 2 m/s approximately. The sensor not only realize compensation of temperature,but also improve measurement precision and sensitivity.
引文
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[8]蒋善超,隋青美,王静,等.流速/温度共采的光纤布拉格光栅涡轮流速传感器[J].光学精密工程,2014,22(10):2611-2616.
[9]宋维彬,景燕敏,张丰伟,等.啁啾光纤光栅的光谱特性研究[J].传感器与微系统,2014,33(5):42-44.
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[11]隋允康.材料力学[M].北京:机械工业出版社,2014.
[2]王艳霞,傅星,李正光,等.高精度的超声波在线流量测量[J].计量学报,2003,24(3):202-204.
[3]李小京,王萍,卢景山.用相关算法改善电磁流量计低流速性能[J].化工自动化及仪表,2004,31(6):66-68.
[4]潘晓涛,孙友松,胡建国,等.卫生洁具水包内流速的应变式测试[J].传感器与微系统,2006,25(8):63-65.
[5]田晶,权王民,王虎,等.光纤Bragg光栅电流传感器的温度补偿研究[J].传感器与微系统,2011,30(6):52-54.
[6]付静,权王民,程犁清.一种光纤光栅智能夹层的实验研究[J].传感器与微系统,2012,31(5):62-64.
[7]杨淑连,申晋,李田泽.基于双光纤布拉格光栅的流速传感器[J].半导体光电,2009,30(5):759-762.
[8]蒋善超,隋青美,王静,等.流速/温度共采的光纤布拉格光栅涡轮流速传感器[J].光学精密工程,2014,22(10):2611-2616.
[9]宋维彬,景燕敏,张丰伟,等.啁啾光纤光栅的光谱特性研究[J].传感器与微系统,2014,33(5):42-44.
[10]吕振,董璞.取样光纤Bragg光栅特性及其通信应用的研究[J].传感器与微系统,2011,30(4):19-21.
[11]隋允康.材料力学[M].北京:机械工业出版社,2014.