A Fiber Bragg Grating Accelerometer Based on a Hybridization of Cantilever Beam

Author

Dingyi Feng ; Xueguang Qiao ; Hangzhou Yang ; Qiangzhou Rong ; Ruohui Wang ; Yanying Du ; Manli Hu ; Zhongyao Feng

Author_Institution

Dept. of Phys., Northwest Univ., Xi´an, China

Volume

15

Issue

3

fYear

2015

fDate

Mar-15

Firstpage

1532

Lastpage

1537

Abstract

A compact fiber Bragg grating (FBG) accelerometer based on a hybridization of two cantilever beams is demonstrated. Two FBGs are prestressed and fixed on the combined-beam longitudinal symmetrically. When a vibration is exerted on the accelerometer, the reflection-peaks of two gratings shift sharply in opposite directions without unwanted chirp. Experimental results show that the proposed sensor exhibits a high dynamic sensitivity of 218.4 pm/G and broad frequency range of 10-150 Hz with a wide dynamic range of 0.1 to 3 G. The cross-axis response is 3.2% of the main axis, and the temperature is self-compensated owing to the same responses to temperature of two reflection wavelengths.

Keywords

Bragg gratings; accelerometers; beams (structures); cantilevers; compensation; fibre optic sensors; vibration measurement; cantilever beam hybridization; fiber Bragg grating accelerometer; frequency 10 Hz to 150 Hz; reflection peak shifting; temperature self-compensation; vibration measurement; Accelerometers; Fiber gratings; Sensitivity; Temperature sensors; Vibrations; Fiber optics sensors; fiber Bragg gratings; vibration measurement;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2014.2364122

Filename

6949648