New Distributed Fibre Optic 3DSensor with Thermal Self-Compensation System: Design, Research and Field Proof Application Inside Geotechnical Structure
The design and applications of the new DFOS sensor dedicated to 3D displacement sensing are described in the article. The novelty of the presented solution lies in several features, including design, application, production technology and materials. This paper is focused on the operational rules governing DFOS and proving their effectiveness in the laboratory and geotechnical field applications.
Distributed Fibre Optic Sensing (DFOS) for Deformation Assessment of Composite Collectors and Pipelines
The article presents an approach for monitoring displacements and strains in Glass Fiber Reinforced Polymer (GFRP) collectors and pipelines using DFOS. The research verifies the effectiveness of the proposed monitoring solution for the health monitoring of composite pipelines. Analysis of strain profiles allowed for calculating the actual displacements (shape) of the pipe within its cross-section plane using the trapezoidal method
Monitoring of Large Diameter Sewage Collector Strengthened with Glass-Fiber Reinforced Plastic (GRP) Panels by Means of Distributed Fiber Optic Sensors (DFOS)
The issue of selecting appropriate sensors enabling correct strain transfer is discussed in the article, indicating both limitations of layered cables and the advantages of sensors with monolithic cross-section design in terms of reliable measurements. The results obtained thanks to monolithic DFOS sensors are presented on the example of real engineering structure - the Burakowski concrete collector in Warsaw during its strengthening with glass-fibre reinforced plastic (GRP) panels.
Distributed fibre optic sensors in FRP composite bridge monitoring: Validation through proof load tests
The distributed fibre optic sensors (DFOS) technique based on Rayleigh scattering has been chosen as the basic structural health monitoring (SHM) system of the first Polish fibre reinforced polymer (FRP) composite bridge. The DFOS strain profiles were first compared with discrete strain measurements and then converted into deflection profiles and validated against discrete deflection measurements.
Smart Composite Rebars based on DFOS Technology as Nervous System of Hybrid Footbridge Deck: A Case Study
The paper presents the concept and application of the smart pedestrian footbridge, equipped with DFOS strain sensors called EpsilonRebars. These sensors, in the form of composite rods being simultaneously the structural reinforcement for the concrete deck, were placed along the entire span of nearly 80 m.