Fibre optic sensing in geotechnics - analysis and evaluation of measured data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00242566" target="_blank" >RIV/68407700:21110/16:00242566 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Fibre optic sensing in geotechnics - analysis and evaluation of measured data

Popis výsledku v původním jazyce

The paper presents the basic principles of the application of Brillouin Optical Time Domain Analysis (BOTDA) for distributed deformation measurement in geotechnics. It briefly describes the possible and tested utilization of this method (laboratory testing, on site applications) and in more details it deals with several issues and problems concerning data interpretation and evaluation. The first problem applies to unexpected increases of measured strain located at the points of attachment of measuring cable (local compression of measuring cables). The other problem deals also with unexpected increase of measured strain, particularly during borehole measurements. These measurements are provided with four measuring fibres at the same time, but the unexpected strain increases occur only at some of them. The measuring (analyzing) unit used for the basic BOTDA data evaluation enables more deep analysis of the measured data at each point of the measurement. This analysis was provided for selected measurement points of laboratory testing; the results are presented at the end of this paper.

Název v anglickém jazyce

Fibre optic sensing in geotechnics - analysis and evaluation of measured data

Popis výsledku anglicky

The paper presents the basic principles of the application of Brillouin Optical Time Domain Analysis (BOTDA) for distributed deformation measurement in geotechnics. It briefly describes the possible and tested utilization of this method (laboratory testing, on site applications) and in more details it deals with several issues and problems concerning data interpretation and evaluation. The first problem applies to unexpected increases of measured strain located at the points of attachment of measuring cable (local compression of measuring cables). The other problem deals also with unexpected increase of measured strain, particularly during borehole measurements. These measurements are provided with four measuring fibres at the same time, but the unexpected strain increases occur only at some of them. The measuring (analyzing) unit used for the basic BOTDA data evaluation enables more deep analysis of the measured data at each point of the measurement. This analysis was provided for selected measurement points of laboratory testing; the results are presented at the end of this paper.

Druh

O - Ostatní výsledky

CEP obor

JM - Inženýrské stavitelství

OECD FORD obor

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Projekt

<a href="/cs/project/FR-TI3%2F609" target="_blank" >FR-TI3/609: Výzkum a vývoj detekce a kontrolního sledování kritických míst geotechnických konstrukcí zejména podzemního stavitelství, báňského průmyslu i ostatních inženýrských staveb</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů