Telecommunications tunnel monitoring system based on distributed optical fiber strain measurement

Naruse, Hiroshi; Komatsu, K.; Fujihashi, Kazuhiko; Okutsu, Masaru

doi:10.1117/12.623645

Cited by 14 publications

(15 citation statements)

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“…There was a displacement sensor unit, the BOTDR, and a personal computer to acquire strain data and calculate displacements. The displacement sensor unit consisted of two aluminum plates PL 1 and PL 2 , and a single special optical fiber sensor [7] . Plate PL 1 was fixed to the surface of a table by an adapter used for adjusting its height, and PL 2 was fixed to an XY stage for giving displacements u g and v g in the directions of the x and y axes, respectively.…”

Section: Displacement Measurement Experimentsmentioning

confidence: 99%

Displacement measurement by sensor unit with a pair of crossed optical fibers

Naruse

Yoshikawa

Arevalo³

et al. 2009

SPIE Proceedings

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We have been researching a displacement measurement system for monitoring rock damage such as cracks in tunnel walls and pillars in an underground mine. The system consists of a displacement sensor unit with a pair of crossed optical fibers and a distributed fiber optic strain measuring device. The strain measuring device measures displacement-induced strains in the optical fibers and, from these measured strains, displacements in two directions are obtained. We analyzed the influence of the strain measurement error and sensor unit configuration on the displacement measurement. Moreover, we confirmed the usefulness of displacement measurement by the sensor unit through experiments using a prototype.

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Section: Displacement Measurement Experimentsmentioning

confidence: 99%

Displacement measurement by sensor unit with a pair of crossed optical fibers

Naruse

Yoshikawa

Arevalo³

et al. 2009

SPIE Proceedings

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“…Earthquake prone areas of the world are particularly relevant here, especially many are highly populated and have well developed infrastructure [24] . Stimulated Brillouin scatter has a remarkable capacity to make distributed measurements over interrogation lengths which may extend to many tens of kilometres so that testing an extensive network using the fibre optic cables which are already installed can be a relatively straight forward undertaking.…”

Section: Generating New Prospectsmentioning

confidence: 99%

Research to reality: bringing fibre optic sensors into applications

Culshaw

2005

SPIE Proceedings

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Approaching four decades have elapsed since the first patents were filed on fibre optic sensor technology. During that time basic principles have become well characterised and established and technological approaches and sensor realisation have become commercially and practically viable. This paper reviews just some of the progress in fibre sensors highlighting in particular the mechanisms involved in turning the bench demonstrator into competitive and effective product

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“…So, we developed an underground mine monitoring system using BOTDR and conducted a field trial to investigate the applicability of the system to mine monitoring. The system was based on the telecommunication tunnel monitoring system that we developed [3]. This paper outlines the underground mine and the monitoring system used for the trial and presents the monitoring results.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the practicality of the BOTDR-based system for monitoring various structures has already been demonstrated [2,3]. So, we developed an underground mine monitoring system using BOTDR and conducted a field trial to investigate the applicability of the system to mine monitoring.…”

Section: Introductionmentioning

confidence: 99%