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Distributed fiber optic sensors for monitoring pressure and stiffness changes in out‐of‐round pipes
Author(s) -
Lim Kenneth,
Wong Leslie,
Chiu Wing Kong,
Kodikara Jayantha
Publication year - 2016
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.1771
Subject(s) - optical fiber , fiber optic sensor , stiffness , brillouin zone , structural health monitoring , structural engineering , time domain , pressure sensor , domain analysis , acoustics , internal pressure , materials science , cross section (physics) , fiber , engineering , mechanical engineering , optics , computer science , composite material , physics , telecommunications , software construction , software , quantum mechanics , software system , computer vision , programming language
Summary Distributed fiber optic sensors have been shown to be promising when used to monitor the structural health of pipes. The body of work thus far has only considered pipes whose cross sections are assumed to remain circular under load. In some applications, the cross section of the pipe has been known to deform when loaded. Subsequent loading on a deformed pipe then generates additional stresses that may have been unaccounted for when designing the pipe. This paper addresses the effects of the initial non‐circular cross section of a pipe under internal pressure and its detection with a distributed fiber optic sensor based on Brillouin Optical Time Domain Analysis. This ability of the Brillouin Optical Time Domain Analysis sensor to detect local stiffness irregularities on an out‐of‐round pipe subjected to internal pressures is also demonstrated. Copyright © 2015 John Wiley & Sons, Ltd.