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EpsilonRebarthe world’s first monolithic strain DFOS sensor designed for direct embedding into the structural member, concrete or soil
EpsilonRebar enables accurate strain and precise crack measurements over its entire length. It takes the form of composite rebar of any diameter (standard Ø 5 mm). It is designed for direct embedding into the newly-designed structural members (concrete or soil) or to be installed within existing structures (e.g. inside grooves in concrete or on the surface of pipelines). Thanks to its high stiffness and tensile strength, EpsilonRebar could be used as a bar with a double function: measuring and reinforcing. Resistance to mechanical loads and environmental conditions makes EpsilonRebar ideal for in-situ applications within construction sites or existing infrastructure.
SENSOR ADVANTAGES:
- STRAIN & CRACK MEASUREMENT ALONG THE ENTIRE LENGTH of the sensor, optionally also temperature changes
- EXCELLENT INTEGRATION with the monitored structure (ribbed external surface)
- MONOLITHIC SECTION WITH NO INTERMIDIATE LAYERS providing accurate readouts
- SHARP and PRECISE view of any local phenomena, especially cracks in concrete
- EASY INSTALLATION – lightweight sensor, ready to use when unrolled from the drum
- RESISTANT TO ENVIRONMENTAL CONDITIONS, including electromagnetic fields and lightning strikes
Applications:
- STRUCTURAL HEALTH MONITORING of engineering structures
- GEOTECHNICAL AND HYDROTECHNICAL ENGINEERING (e.g. slurry and retaining walls, piles, concrete columns, dams, embankments)
- LINE STRUCTURES: roads and bridges, tunnels, railway lines, pipelines and others
Application of DFOS strain Sensors for the structural health monitoring of real engineering structures allows for strain measurements over the entire length with a spatial resolution starting from 5 mm. The key thing is to use sensors that are accurate and reliable. EpsilonRebar provides new opportunities in the quantitative and qualitative assessment of strains and cracks in concrete. It allows for the precise detecting of the cracks locations and estimating their actual width during changing environmental conditions over the long term.
Technical specifications:
| Strain measurement resolution | 1,0 µɛ |
| Strain measurement range | ± 2% |
| Elastic modulus | 50 GPa |
| Operating temperature | -20 to +100°C |
| Sensor diameter | Ø 5-20 mm (standard Ø 5 mm) |
| Sensor weight | 45 kg/km (for Ø 5 mm) |
| Sensor material | GFRP (glass fiber + epoxide) |
| Scattering used | Rayleigh, Brillouin or Raman |
| Method of delivery | coils or straight sections |
| Sensor length | any length made to order |
the world’s first composite DFOS sensor with strain range up to 4% and elasticity (E = 3 GPa) not influencing the structural behavior of monitored structure
EpsilonSensor enables accurate strains and precise crack measurements over its entire length due to the perfect bonding with the specimen. Specially selected composite material provides unique strain reading precision and sensitivity. EpsilonSensor is a perfect solution for laboratory applications, designed for direct embedding into the newly-designed structural members (made of concrete or soil) or to be installed within existing structural members (e.g. reinforced or prestressed concrete girders). Lightweight, low bending radius and extremely low stiffness allow the sensor to be installed easy and to not influence the behavior of the specimen.
Sensor advantages:
- STRAIN AND CRACK MEASUREMENT ALONG THE ENTIRE LENGTH of the sensor, optionally also temperature
- NO SENSOR INFLUENCE on the monitored structural member (negligible stiffness)
- MONOLITHIC SECTION WITH NO INTERMIDIATE LAYERS providing accurate readouts
- SHARP and PRECISE view of any local phenomena, especially cracks in concrete
- EASY INSTALLATION – lightweight sensor, ready to use when unrolled from the drum
- RESISTANT TO ENVIRONMENTAL CONDITIONS, including electromagnetic fields and lightning strikes
Applications:
- LABORATORY REASERCH – especially crack observation in concrete
- STRUCTURAL HEALTH MONITORING of engineering structures
- reinforced and prestressed CONCRETE specimens
Application of DFOS strain Sensors for the structural health monitoring of real engineering structures allows for strain measurements over the entire length with a spatial resolution starting from 5 mm. The key thing is to use sensors that are accurate and reliable. EpsilonSensor provides new opportunities in the quantitative and qualitative assessment of strains and cracks in concrete. It allows for the precise detecting the cracks locations and estimating their actual width during changing environmental conditions over the long term.
Technical specifications:
| Strain measurement resolution | 1,0 µɛ |
| Strain measurement range | ±4% |
| Elastic modulus | 3 GPa |
| Operating temperature | -20 to +80°C (extended range on request) |
| Sensor diameter | standard Ø 3 mm |
| Sensor weight | 13 kg/km (for Ø 3 mm) |
| Sensor material | PLFRP (polyester fiber + epoxide) |
| Scattering used | Rayleigh, Brillouin or Raman |
| Method of delivery | coils or straight sections |
| Sensor length | any length made to order |
the world’s first shape DFOS sensor for geotechnics and civil engineering, measuring displacements of the structure in 3D space along its entire length
3DSensor enables to measure displacements over its entire length in three-dimensional space. It is designed to be directly embedded into the monitored structure, for example in soil or concrete, or to be installed on the surface of the existing structure. It has adjustable dimensions to fulfill the requirements of the specific project. 3DSensor is most applicable to monitor pipelines, landslide areas, roads, bridges, embankments and other linear structures. It provides quantitative information on displacements, movements or deflections, expressed directly in mm.
Advantages:
- VERTICAL AND HORIZONTAL DISPLACEMENT measurements along the entire length of the sensor
- LABORATORY AND IN SITU version
- ADJUSTABLE GEOMETRY to optimize the sensitivity for a specific project
- NO SENSOR INFLUENCE on the monitored medium (negligible stiffness)
- RESISTANT TO ENVIRONMENTAL CONDITIONS, including electromagnetic fields and lightning strikes
- EASY INSTALLATION – lightweight sensor, ready to use when unrolled from the drum
Applications:
- STRUCTURAL HEALTH MONITORING of engineering structures
- GEO- AND HYDROTECHNICAL ENGINEERING (e.g. slurry and retaining walls, piles, concrete columns, dams, embankments)
- LINE STRUCTURES: roads and bridges, tunnels, railway lines, pipelines and others
- LANDSLIDE and MINING areas
Application of DFOS shape Sensors for the structural health monitoring of real engineering structures allows for displacement measurements over entire length with a spatial resolution starting from 5 mm. The key thing is to use sensors which are accurate and reliable. Due to its negligible stiffness, 3D Sensor allows the determination of the slip plane without impacting the soil structure which may affect the analysis and result in misinterpretation of the data.
Technical specifications
| Displacement measurement resolution | 1,0 mm |
| Displacement measurement range | any, dependent on the medium deformations |
| Operating temperature | -20 to +60 °C |
| Sensor dimensions | 45 x 12 mm |
| Sensor weight | 252 kg/km (in situ version) |
| Sensor material | PLFRP + PE |
| Scattering used | Rayleigh, Brillouin or Raman |
| The method of delivery | storage coils or straight sections |
| Sensor length | any length made to order |