NDLI: Design and Analysis of a High Sensitivity FBG Accelerometer Based on Local Strain Amplification

Content Provider	IEEE Xplore Digital Library
Author	Jun Wang Gangding Peng Zhengliang Hu Huayong Yang Yongming Hu
Copyright Year	2001
Abstract	A fiber Bragg grating (FBG) accelerometer based on a push-pull elastic cylinder structure is demonstrated. First, the model based on the uniform cylinder structure is analyzed and the optimized accelerometer parameters are given. Then, by designing a radius-varying cylinder structure, the FBG strain becomes larger than the cylinder strain, which leads to enhanced sensitivity amplification for a small accelerometer size and relatively high resonant frequency. Meanwhile, the influence of the transverse force on the accelerometer is theoretically analyzed. These results indicate that the transverse-induced FBG deformation is very big so that a strict transverse constrain is needed. The formula of the strain magnification is derived and the design rules of the strain magnification are given. After structure optimization according to the rules, the FBG strain increases to 1.5 times, the sensitivity increases to 1.82 times, whereas the resonant frequency reduces to 0.9 times compared with the parameters of accelerometer based on uniform cylinder structure. Finally, the accelerometer size reduces to Φ20 mm × 34 mm, the sensitivity increases to 623 pm/g, and the resonant frequency reduces to 449 Hz.
Sponsorship	IEEE Sensors Council
Starting Page	5442
Ending Page	5449
Page Count	8
File Size	1497782
File Format	PDF
ISSN	1530437X
Volume Number	15
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Accelerometers Sensitivity Strain Resonant frequency Force Sensors Fiber gratings local strain amplification FBG accelerometer elastic cylinder structure optimization
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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