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基于双悬臂梁结构的光纤加速度传感器
Fiber accelerometer based on double-cantilever structure
【摘要】 为消除悬臂梁结构加速度传感器由于光纤表面粘贴产生的啁啾现象,增强横向抗干扰能力,提高共振频率,提出了一种基于双悬臂梁结构的光纤加速度传感器。给出了理论分析结果,建立了有限元模型,得到了加速度灵敏度表达式,并且探讨了在共振频率不变的情况下提高加速度灵敏度的方法。实验结果表明,该传感器在6~50 Hz内频响平坦,加速度灵敏度为14pm/g,抗横向干扰能力达20dB,与理论计算较好地吻合。
【Abstract】 A novel fiber accelerometer based on double-cantilever structure is presented in this paper.The accelerometer can eliminate the chirp effects casued by glue,reduce the transverse response and increase the natural frequency.Theoretical analysis is given and the finite element method is used.A method to enhance the sensitivity without reducing the resonant frequency is also proposed.The experimental results show a flat frequency response from 6 Hz to 50 Hz,a sensitivity of 14 pm/g and a directivity of better than 20 dB,which agree well with the theoretical analysis.
【Key words】 fiber sensing; cantilever beam; fiber laser; acceleration; sensor; finite element analysis(FEA);
- 【文献出处】 光电子.激光 ,Journal of Optoelectronics.Laser , 编辑部邮箱 ,2012年04期
- 【分类号】TP212
- 【被引频次】5
- 【下载频次】415