Identification of distortions to FBG spectrum using FBG fixed filters
Paper
Paper/Presentation Title | Identification of distortions to FBG spectrum using FBG fixed filters |
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Presentation Type | Paper |
Authors | Kahandawa, G. C. (Author), Epaarachchi, J. A. (Author) and Wang, H. (Author) |
Editors | Lee, Woo |
Journal or Proceedings Title | Proceedings of the 18th International Conference on Composite Materials (ICCM-18) |
ERA Conference ID | 43257 |
Number of Pages | 6 |
Year | 2011 |
Place of Publication | Korea |
Web Address (URL) of Paper | https://www.iccm-central.org/Proceedings/ICCM18proceedings/papers/T19-1-AF1896.pdf |
Web Address (URL) of Conference Proceedings | https://www.iccm-central.org/Proceedings/ICCM18proceedings/index.htm |
Conference/Event | 18th International Conference on Composite Materials (ICCM-18) |
International Conference on Composite Materials | |
Event Details | International Conference on Composite Materials Rank A A A A A A A A A A A A A A |
Event Details | 18th International Conference on Composite Materials (ICCM-18) Parent International Conference on Composite Materials Delivery In person Event Date 21 to end of 26 Aug 2011 Event Location Jeju, Korea |
Abstract | Recent advances in fibre optic sensor technologies have provided great opportunities to develop more sophisticated in-situ SHM systems. There have been a large number of research reports on health monitoring of composite structures using Fibre Bragg Grating (FBG) sensors. Distortion of FBG sensors has been successfully used by many researchers to identify damage and to locate damage in composite structures. Observations of the distorted sensor spectrums due to stress concentrations caused by delaminations and cracks, have been using to estimate the damage conditions. The majority of the research works were focused on the investigation of the spectra of a FBG sensor embedded in the vicinity of a damage, in order to detect and identify the damage by relating to the distortion of the FBG sensor spectra. However the cause of the distortion of FBG spectra not only depends on the consequences of accumulated damage but also loading types and the fibre orientation. Embedding FBG's in-between non parallel fibre layers and the application of torque have caused substantial distortions to the FBG spectra. A reference FBG spectra needs to be incorporated to FBG measurements to identify the variations to the FBG spectrum and to distinguish the other effects causing distortions. For this purpose, a fixed FBG based system was developed to measure the reflected FBG spectra in time domain. The fixed FBG method was used to estimate the peak using non distorted FBG spectra previously. Unfortunately there was no work done on the identification of distortions of FBG spectra using fixed FBG sensors. This paper details the research work performed to identify distortions of reflected spectra of an embedded FBG sensors inside a composite laminate. The developed method will provide the flexibility of input FBG time domain data directly to post processing algorithms for decoding and damage identification. |
Keywords | FBG sensors; composite materials; structural health monitoring; fibre Bragg grating sensors |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
400999. Electronics, sensors and digital hardware not elsewhere classified | |
400101. Aerospace materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q1310/identification-of-distortions-to-fbg-spectrum-using-fbg-fixed-filters
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