Proposal of metal bellows-based fiber Bragg grating accelerometer  

作　　者：张敬花 乔学光 忽满利 冯忠耀 高宏 杨扬 周锐 

机构地区：[1]Department of Physics,Northwest University of China

出　　处：《Chinese Optics Letters》2011年第9期21-24,共4页中国光学快报（英文版）

基　　金：supported by the International S&T Cooperation Project of China by the MOST of China (No. 2009DFG13050);the National "863" Program of China (Nos. 2007AA06Z413 and 2009AA06Z203);the Key Scientific and Technological Research Project of Shaanxi Province (Nos. 20092KC01-19 and 2008ZDGC-14);the National Natural Science Foundation of China ( Nos. 60727004 and 61077060)

摘　　要：A metal bellows-based fiber Bragg grating （FBG） accelerometer is proposed and experimentally demonstrated. The optical fiber （containing the FBG） is pre-tensioned, and the two ends of the optical fiber are fixed directly from the shell to the inertial mass. In this design, the FBG is uniformly tensioned to obtain a constant strain distribution over it. By employing this configuration, the FBG always has a sharp reflection characteristic with no broadening in its reflection spectrum during wavelength shifting. Dynamic vibration measurements show that the proposed FBG accelerometer has a wide frequency response range （5-110 Hz） and an extremely high sensitivity （548.7 pro/g）. The two important indicators of FBG accelerometer can be tuned by the addition of mass to tailor the sensor performance to specific applications, identifying it as a good candidate for structural health monitoring.A metal bellows-based fiber Bragg grating （FBG） accelerometer is proposed and experimentally demonstrated. The optical fiber （containing the FBG） is pre-tensioned, and the two ends of the optical fiber are fixed directly from the shell to the inertial mass. In this design, the FBG is uniformly tensioned to obtain a constant strain distribution over it. By employing this configuration, the FBG always has a sharp reflection characteristic with no broadening in its reflection spectrum during wavelength shifting. Dynamic vibration measurements show that the proposed FBG accelerometer has a wide frequency response range （5-110 Hz） and an extremely high sensitivity （548.7 pro/g）. The two important indicators of FBG accelerometer can be tuned by the addition of mass to tailor the sensor performance to specific applications, identifying it as a good candidate for structural health monitoring.

关 键 词：Accelerometers BELLOWS Electric arc welding Fibers Frequency response Structural health monitoring 

分 类 号：TN253[电子电信—物理电子学] U464.134.4[机械工程—车辆工程]