Abstract
A novel fiber Bragg grating (FBG) accelerometer is proposed. The accelerometer is based on a compact symmetrical structure consisting of a Y-shaped beam and an FBG. The mechanical model and sensing principle of the accelerometer are well illustrated. Then, the structural parameters are numerically studied. In experiment, the measured resonant frequency is 700 Hz, and the stable working frequency range is 50 ~ 400 Hz with an average sensitivity of 57.4 pm/g. The wavelength shift of FBG is linearly related to the acceleration with linearity better than 99.9%. Moreover, temperature effect on the accelerometer is also tested. The accelerometer exhibits good dynamic performance, as well as the advantages of compact structure and easy manufacturing, making it a candidate for vibration measurement.
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