title: Distributed brillouin scattering sensor for discrimination of wall-thinning defects in steel pipe under internal pressure.
abstract: A distributed Brillouin scattering sensor has been employed to identify several inner wall cutouts in an end-capped steel pipe by measuring the axial and hoop strain distributions along the outer surface of the pipe. The locations of structural indentations that constitute 50-60% of the inner pipe wall are found and distinguished by use of their corresponding strain-pressure data. These results are quantified in terms of the fiber orientation, defect size and depth, and behavior relative to those of unperturbed pipe sections.
authors.affiliation: Fiber Optics Group, Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario K1N 6N5, Canada. lufan.zou@science.uottawa.ca
authors.forename: Lufan
authors.initials: L
authors.lastname: Zou
authors.forename: Graham A
authors.initials: GA
authors.lastname: Ferrier
authors.forename: Shahraam
authors.initials: S
authors.lastname: Afshar
authors.forename: Qinrong
authors.initials: Q
authors.lastname: Yu
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Bao