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Distributed Temperature and Strain
Luna Technologies' Distributed Temperature and Strain Sensing Software, when combined with the Optical Backscatter Reflectometer (OBR), transforms your standard telecom-grade fiber into a high spatial-resolution strain and temperature sensor.
The OBR uses swept wavelength interferometry (SWI) to measure the Rayleigh backscatter as a function of length in optical fiber with high spatial resolution. An external stimulus (like a strain or temperature change) causes temporal and spectral shifts in the local Rayleigh backscatter pattern. The OBR measures these shifts and scales them to give a distributed temperature or strain measurement. The SWI approach enables robust and practical distributed temperature and strain measurements in standard fiber with millimeter-scale spatial resolution over tens to hundreds of meters of fiber with strain and temperature resolution as fine as 1 µstrain and 0.1 °C.
ADVANTAGES:
Use standard telecom-grade fiber. No more expensive specialty fibers needed for measurements.
Highly distributed fiber sensing for strain and temperature
Very high spatial resolution: down to 2 mm
Hundreds of meters of sensing length
+/- 0.1°C , +/- 1µstrain resolution at 1 cm
High speed – 5 s acquisition times at high resolution
High temperature capabilties - up to 900°C
APPLICATIONS:
Short range communications networks (local intranet, fiber to the home, shipboard and aircraft data bus):
- Find high operational temperatures that degrade lifetime or performance of components
- Determine if strain induced during installation exceeds safe threshold
- Look for long-term strain concentrations that threaten fiber integrity
Structural monitoring for naval, aerospace and civil structures:
- Conformal deformation and shape sensing
- Composite damage assessment
- Bonded joint integrity monitoring
Temperature profile monitoring in extreme environments:
- Cryogenic fuel tanks
- Fuel cells
- Concrete cure temperature monitoring in large structures
- Industrial chemical process monitoring
- High temperature capabilities - up to 900°C
Pipeline shift and leak detection
Electrical power line sag and temperature monitoring
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