FIBER OPTIC SENSING
Fiber bragg grating
A Fiber Bragg Grating (FBG) is a microstructure with a few millimeters length within an optical fiber.
- Monitor well defined points
- Sensors for strain, temperature, tilt, acceleration, displacement, etc.
- Up to 40 multiplexed sensors per channel
- Fiber Bragg Grating Technology
- up to 16 channels on one interrogation unit
- Monitor parameters on the complete length of the fiber
- Strain and / or temperature
- Up to 50km with one device
- Raman and Brillouin sensing technology
Distributed Acoustic Sensing (DAS) relies on Rayleigh backscatter, which interacts with the optical fiber, exposed by acoustic waves.
- Monitor acoustic events
- Detect location with accuracy 1-10m
- Up to 50 km with one device
- Rayleigh sensing technology
Why Fiber Optics
Almost no maintenance. Cable lifetime >20 years
No electrical power at the measurement point
Remote monitoring (50 km and more)
High sensitivity and accuracy
At sensing point Insensitive lead in to reduce disturbances
Harsh and explosive environments
Resistant to corrosion, lightning, etc.
Immune to EMI
A Fiber Bragg Grating (FBG) is a sensitive optical microstructure of a few millimeters length which is integrated into a standard single-mode fiber.
Fiber Bragg Gratings
A Distributed Acoustic Sensing (DAS) is a microstructure with a few millimeters in length.
Fiber Optic Sensing Specialist.
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