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.
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)
