2011
DOI: 10.1051/epjconf/20111203004
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Qualification of a truly distributed fiber optic technique for strain and temperature measurements in concrete structures

Abstract: Abstract. Structural health monitoring is a key factor in life cycle management of infrastructures. Truly distributed fiber optic sensors are able to provide relevant information on large structures, such as nuclear power plants or nuclear waste disposal facilities. The sensing chain includes an optoelectronic unit and a sensing cable made of one or more optical fibers. A new instrument based on Optical Frequency Domain Reflectometry (OFDR), enables to perform temperature and strain measurements with a centime… Show more

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Cited by 20 publications
(13 citation statements)
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“…Veröffentlichungen [15][16][17][18][19] [10,11]. Dem Lehrstuhl für Massivbau der Technischen Universität München (TUM) stehen die zwei neuesten Geräte (entsprechend der Produktspezifikation des Herstellers: Typ "A" und Typ "B") zur Verfügung.…”
Section: Fachthema Articleunclassified
“…Veröffentlichungen [15][16][17][18][19] [10,11]. Dem Lehrstuhl für Massivbau der Technischen Universität München (TUM) stehen die zwei neuesten Geräte (entsprechend der Produktspezifikation des Herstellers: Typ "A" und Typ "B") zur Verfügung.…”
Section: Fachthema Articleunclassified
“…As such, the backscatter sensing technology used in the current research is based on Rayleigh Backscatter, which occurs due to interactions between the propagated light pulse and the silica density composition of the fiber at each point along its length. The light pulse reflects off of these imperfections along the fiber length and scatters portions of the light spectrum back to the analyzing unit 8 . When the fiber is strained the distance between these imperfections changes, which in turn changes the backscattered light spectrum measured at that location.…”
Section: Fiber Optic Strain Sensingmentioning
confidence: 99%
“…The measurement range is approximately 70m with a measurement time less than 10s. This sensing technique has already been tested successfully for damage detection in composites laminates [2], for crack detection in concrete [3,4] and for structural tests of wind turbine blade [5]. Its main limitation is the measurement time, which allows making measurements only under static loads.…”
Section: Fiber Optic Sensors and Measurement Systemmentioning
confidence: 99%