Measurements of transient elastic wave using a fiber grating displacement and strain sensing system
Journal Volume
2010
Journal Issue
574 CP
Start Page
25
End Page
28
ISBN (of the container)
9780863417290
9780863419003
9781849191609
9781839530029
9781849195584
9781849198172
9781849196246
9781849195690
9781785610462
9780863419027
Date Issued
2010
Author(s)
Ma, Chien-Ching
Abstract
We demonstrate an all-fiber three-dimensional dynamical measurement system as well as a gluing concept for setting up fiber Bragg grating (FBG) displacement or strain sensors with high sensitivity. To show the dynamic measurement ability of the proposed system, the multidimensional transient elastic wave propagation in an Aluminum thick square plate subjected to impact loadings is investigated. The proposed system employs an FBG filter as well as a long-period fiber grating (LPFG)-based wavelength-optical intensity modulation technique. To verify the dynamic sensing ability of the proposed sensing system, a non-contact laser Doppler vibrometer (LDV) as well as traditional strain gauges are employed to compare the transient results measured by the FBG sensors. Frequency contents of the transient in-plane displacement and strain responses are compared to further demonstrate the dynamic sensing ability of the FBG sensors.
Event(s)
9th International Conference on Optical Communications and Networks, ICOCN 2010
Subjects
Fiber Bragg Grating (fbg)
In-plane
Intensity Modulation Technique
Long-period Fiber Grating (lpfg)
Out-of-plane
Fiber Bragg Grating (fbg)
In-plane
Intensity Modulation Technique
Long Period Fiber Grating
Out-of-plane
Diffraction Gratings
Elastic Waves
Electric Sensing Devices
Fiber Bragg Gratings
Fiber Optic Components
Frequency Modulation
Gages
Laser Doppler Velocimeters
Optical Communication
Sensors
Soil Structure Interactions
Wave Propagation
Fibers
Description
9th International Conference on Optical Communications and Networks, ICOCN 2010. Nanjing. Conference code: 84932
Type
conference paper