非本征光纤法珀传感器的振动特性研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (2) : 158-161.

论文

非本征光纤法珀传感器的振动特性研究

郭少朋1,2，方光荣1,2，刘俊标1,2，鞠昱1

作者信息 +

Vibrant characteristics of extrinsic fiber Fabry-Perot sensors

GUO Shao-peng1,2，FANG Guang-rong1,2，LIU Jun-biao1,2，JU Yu1

Author information +

文章历史 +

摘要

针对光纤法珀(Fabry-Perot, FP)超声波传感器振动特性，将传感器薄板振动简化为具有集中参数的二阶振动，推导二阶振动方程的集中参数(力阻抗、等效质量、弹性系数、集中力)，获得传感器共振频率、振幅灵敏度与结构参数设计关系。测试直径2.52 mm、厚度150 μm玻璃振动薄板在空气、水中的共振频率分别为205 kHz及115 kHz，水介质中共振频率振幅灵敏度约18 pm/Pa。制作的传感器可测试局放产生超声波的最小声压约1 Pa。

Abstract

Vibrant characteristics are important to design the ultrasonic fiber Fabry-Perot sensors used for partial discharges detection. The vibrations of the film in the sensors could be simplified as tow-order vibrations with lumped parametrers. Lumped parameters (mechanical impedance, equivalent mass, elastic coefficient, concentrated force) in two-order vibrant equations were analyzed for the FP sensors in liquid.The formulations between sensor’s resonant frequencies, amplitude sensitivities and structure parameters were obtained. For a vibrant plate with 2.52 mm-diameter and 150 μm-thickness in the sensor, the resonant frequencies were 205 kHz in atmosphere and 115 kHz in water, and the amplitude sensitivities was about 18 pm/Pa on 115 kHz frequency in water. The minimum detectable acoustic pressure is about 1Pa with the fabricated sensors.

导出引用

郭少朋1,2，方光荣1,2，刘俊标1,2，鞠昱1. 非本征光纤法珀传感器的振动特性研究[J]. 振动与冲击, 2016, 35(2): 158-161

GUO Shao-peng1,2，FANG Guang-rong1,2，LIU Jun-biao1,2，JU Yu1. Vibrant characteristics of extrinsic fiber Fabry-Perot sensors[J]. Journal of Vibration and Shock, 2016, 35(2): 158-161

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