Publication Details

Category Text Publication
Reference Category Journals
DOI 10.3390/s24144659
Licence creative commons licence
Title (Primary) The impact of liquids and saturated salt solutions on polymer-coated fiber optic sensors for distributed strain and temperature measurement
Author Weisbrich, M.; Messerer, D.; Holzer, F. ORCID logo ; Trommler, U.; Roland, U.; Holschemacher, K.
Source Titel Sensors
Year 2024
Department TECH
Volume 24
Issue 14
Page From art. 4659
Language englisch
Topic T7 Bioeconomy
Keywords DFOS; distributed fiber optic sensing; fiber optic sensor; fiber coating; strain measurement; temperature measurement; SHM (Structural Health Monitoring)
Abstract The application of distributed fiber optic strain and temperature measurement can be utilized to address a multitude of measurement tasks across a diverse range of fields, particularly in the context of structural health monitoring in the domains of building construction, civil engineering, and special foundation engineering. However, a comprehensive understanding of the influences on the measurement method and the sensors is essential to prevent misinterpretations or measurement deviations. In this context, this study investigated the effects of moisture exposure, including various salt solutions and a high pH value, on a distributed strain measurement using Rayleigh backscattering. Three fiber optic sensors with different coating materials and one uncoated fiber were exposed to five different solutions for 24 h. The study revealed significant discrepancies (38%) in deformation between the three coating types depending on the surrounding solution. Furthermore, in contrast to the prevailing literature, which predominantly describes swelling effects, a negative deformation (47 με) was observed in a magnesium chloride solution. The findings of this study indicate that corresponding effects can impact the precision of measurement, potentially leading to misinterpretations. Conversely, these effects could be used to conduct large-scale monitoring of chemical components using distributed fiber optic sensing.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=29220
Weisbrich, M., Messerer, D., Holzer, F., Trommler, U., Roland, U., Holschemacher, K. (2024):
The impact of liquids and saturated salt solutions on polymer-coated fiber optic sensors for distributed strain and temperature measurement
Sensors 24 (14), art. 4659 10.3390/s24144659