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1 Optica Applicata

1 2012

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A high sensitivity vector accelerometer based on tri-axial fiber Bragg grating

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Jiang Q. , Yang M.

Optica Applicata

2012

tom Vol. 42, nr 4

901--912

Firstly, a single-axis FBG accelerometer with intensity modulation-direct detection interrogation system was put forward and designed in the paper. Experiments with different excitation frequencies were implemented, which demonstrate its good mechanical structure and fabrication technology. Accordingly, a novel tri-axis FBG accelerometer based on the single-axis FBG accelerometer was proposed and a series of periodic vibration tests were finished to prove its performance at different excitation frequencies. The response of the tri-axis vector FBG accelerometer can keep up with the increasing excitation frequency with good signal-to-noise ratio (SNR) within 160 Hz. The suitable measurement frequency range of the accelerator is between 0 and 500 Hz. The cross-axis response among three axes is analyzed. These experiments indicate that horizontal axes have less influence on the vertical axis vibration of FBG.