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Multiple windows algorithm for event detection in STFT-BOTDR
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Yu, Yifei, Luo, Linqing, Li, Bo, Yan, Jize and Soga, Kenichi (2016) Multiple windows algorithm for event detection in STFT-BOTDR. In: International Conference on Smart Infrastructure and Construction, Cambridge, UK, 27–29 Jun 2016. Published in: Transforming the Future of Infrastructure through Smarter Information: Proceedings of the International Conference on Smart Infrastructure and Construction pp. 123-128.
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Official URL: https://www.icevirtuallibrary.com/doi/abs/10.1680/...
Abstract
Short-time Fourier Transform (STFT) as a class of the time-frequency analysis have been utilised to deliver a fast-speed, accurate and low-variation BOTDR (Brillouin Optical Time Domain Reflectometer) system. The different window functions applied in the signal processing are important to improve the spatial resolution, frequency resolution, and variance of the BOTDR and to detect small event in the real application such as strain or temperature events smaller than the pulse length along the fibre. Window functions with long duration can achieve high frequency resolution, but be difficult to detect events less than the window length. While, small-length window offers better event detection performance than the long-duration window, but induces high variation along the fibre under test (FUT). For instance, the rectangular window offers a better frequency resolution; and the hamming window is better at the event detection. This paper introduces an optimised algorithm by utilising two separate windows and comparing the Brillouin frequency difference along the distance domain between the results generated by different windows to enhance the capability of small event detection, such as cracks and sharp temperature variation along the fibre.
| Item Type: | Conference Item (Paper) | ||||||
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
| Journal or Publication Title: | Transforming the Future of Infrastructure through Smarter Information: Proceedings of the International Conference on Smart Infrastructure and Construction | ||||||
| Publisher: | ICE | ||||||
| Official Date: | 6 April 2016 | ||||||
| Dates: |
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| Page Range: | pp. 123-128 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Conference Paper Type: | Paper | ||||||
| Title of Event: | International Conference on Smart Infrastructure and Construction | ||||||
| Type of Event: | Conference | ||||||
| Location of Event: | Cambridge, UK | ||||||
| Date(s) of Event: | 27–29 Jun 2016 |
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