Cantilever-based FBG sensor for temperature-independent acceleration measurement

Wenjun Zhou; Xinyong Dong; Yongxing Jin; Chun-Liu Zhao

doi:10.1117/12.851995

25 November 2009 Cantilever-based FBG sensor for temperature-independent acceleration measurement

Wenjun Zhou, Xinyong Dong, Yongxing Jin, Chun-Liu Zhao

Proceedings Volume 7634, Optical Sensors and Biophotonics; 763413 (2009) https://doi.org/10.1117/12.851995
Event: Asia Communications and Photonics, 2009, Shanghai, Shanghai , China

Abstract

A novel accelerometer based on a strain-chirped optical fiber Bragg grating (FBG) is proposed. The FBG is glued in a slanted direction onto the lateral side of a right-angled triangle cantilever beam with a mass bonded on its free end. Vertical acceleration applied to the cantilever beam leads to a uniform bending along the beam length. As a result, the FBG is chirped and its reflection bandwidth changes linearly with the applied acceleration. A high sensitivity of 0.679 nm/g has been achieved in the experiment. The experimental results of the sensor are compared with the results of a conventional accelerometer for the dynamic measurements. This sensor is temperature insensitive, owning to the temperature-independence nature of reflection bandwidth of the FBG.

Citation Download Citation

Wenjun Zhou, Xinyong Dong, Yongxing Jin, and Chun-Liu Zhao "Cantilever-based FBG sensor for temperature-independent acceleration measurement", Proc. SPIE 7634, Optical Sensors and Biophotonics, 763413 (25 November 2009); https://doi.org/10.1117/12.851995

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