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.
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)
