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Application of Fiber Bragg Gratings on Impact Monitoring and Source Locating
Date Issued
2010
Date
2010
Author(s)
Chen, Bo-Lian
Abstract
Experimental and numerical analyses have been carried out to demonstrate the feasibility and evaluate the limitation of using fiber Bragg gratings for impact source location on a cold rolled aluminum plate. Within the area enveloped by a four-FBG-array, source location is reasonably accurate. Beyond that area, prediction error may not be acceptable. Numerical simulations show that such error may be attributed to the limitation of equipment resolution on the one hand and angular insensitivity of the FBG on the other hand. An FBG rosette, which eliminated the limitation of angular sensitivity, was used to repeat impact source location experiment on the aluminum plate. The scope where impact events can be precisely located was expanded a lot by FBG rosettes.
An impact monitoring system using an array of fibre Bragg grating (FBG) sensors has been established on a wind turbine blade. The effect of the locations and detection capability of the FBG has been investigated. One dimensional impact location along the longitudinal direction of the blade was achieved on over two-thirds of the blade. With such a system, the corresponding strain history and occurrence of local damage can be monitored, thus helping to narrow down the scope of more detailed examination during an overhaul and enabling the integrity of a wind turbine blade to be more reliably assessed and monitored.
An impact monitoring system using an array of fibre Bragg grating (FBG) sensors has been established on a wind turbine blade. The effect of the locations and detection capability of the FBG has been investigated. One dimensional impact location along the longitudinal direction of the blade was achieved on over two-thirds of the blade. With such a system, the corresponding strain history and occurrence of local damage can be monitored, thus helping to narrow down the scope of more detailed examination during an overhaul and enabling the integrity of a wind turbine blade to be more reliably assessed and monitored.
Subjects
Fiber Bragg Gratings
Impact Source Location
FBG Rosette
Wind Turbine Blade
One-dimensional Impact Location
Type
thesis
File(s)
No Thumbnail Available
Name
ntu-99-F92522525-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):77590414dbbce5a7e0c5a499c77e125f