Compact FBG diaphragm accelerometer based on L-shaped rigid cantilever beam  

作　　者：翁银燕 乔学光 冯忠耀 忽满利 张敬花 杨扬 

机构地区：[1]Department of Physics,Northwest University of China [2]Key Laboratory of Photoelectricity Gas-Oil Logging and Detecting,Ministry of Education,Xi'an Shiyou University of China

出　　处：《Chinese Optics Letters》2011年第10期18-21,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.60727004 and 61077060);the National "863" Program of China(Nos. 2007AA03Z413 and 2009AA06Z203);the Ministry of Education Project of Science and Technology Innovation (No.Z08119);the Ministry of Science and Technology Project of International Cooperation(No.2008CR1063);the Shaanxi Province Project of Science and Technology Innovation(Nos.2009ZKC01-19 and 2008ZDGC14)

摘　　要：A compact fiber Bragg grating （FBG） diaphragm accelerometer based on L-shaped rigid cantilever beam is proposed and experimentally demonstrated. The sensing system is based on the integration of a flat diaphragm and an L-shaped rigid cantilever beam. The FBG is pre-tensioned and the two side points are fixed, efficiently avoiding the unwanted chirp effect of grating. Dynamic vibration measurement shows that the proposed FBG diaphragm accelerometer provides a wide frequency response range （0-110 Hz） and an extremely high sensitivity （106.5 pm/g）, indentifying it as a good candidate for embedding structural health monitoring and seismic wave measurement.A compact fiber Bragg grating （FBG） diaphragm accelerometer based on L-shaped rigid cantilever beam is proposed and experimentally demonstrated. The sensing system is based on the integration of a flat diaphragm and an L-shaped rigid cantilever beam. The FBG is pre-tensioned and the two side points are fixed, efficiently avoiding the unwanted chirp effect of grating. Dynamic vibration measurement shows that the proposed FBG diaphragm accelerometer provides a wide frequency response range （0-110 Hz） and an extremely high sensitivity （106.5 pm/g）, indentifying it as a good candidate for embedding structural health monitoring and seismic wave measurement.

关 键 词：Accelerometers Cantilever beams DIAPHRAGMS Frequency response Nanocantilevers Sensors Structural health monitoring 

分 类 号：TN253[电子电信—物理电子学] TH824.4[机械工程—仪器科学与技术]