19-10-2012, 05:46 PM
Sensing Technology.
[attachment=36770]
Measuring system.
Raman effect.
For temperature sensing only.
Intensity change method.
Uses multimode fibres.
Cost effective solution for distances up to 8-10 km.
Brillouin effect.
For Temperature and strain sensing.
Frequency shift method.
Uses singlemode fibres.
For distances up to 30 km and more.
Can be combined with singlemode communication transmission.
Raman vs. Brillouin sensing techniques.
Brillouin-based temperature/strain sensing.
Brillouin scattering is sensitive to strain and temperature.
Possibilities to be stimulated through dedicated optical
processing.
Requires singlemode optical fibers.
Offers greater distance range (up to more than 30km).
Advantage of frequency-based measurement technique.
More advanced measurement system.
Compatibility with singlemode fiber communication system
(sensing can be multiplexed with data transmission.
Applications and markets (general).
Oil and gas industries.
Pipelines, storage tanks, off-shore platforms, subsea
exploration…
Civil engineering.
Structural monitoring (dams, dikes, highways, ...).
Surveillance and Safety systems.
Tunnels, buildings, heating systems, waste disposal sites, power
cables, air-con systems, dikes
Land slide.
Environmental sciences.
Telecommunications.
Maintenance activities on fiber cables.
[attachment=36770]
Measuring system.
Raman effect.
For temperature sensing only.
Intensity change method.
Uses multimode fibres.
Cost effective solution for distances up to 8-10 km.
Brillouin effect.
For Temperature and strain sensing.
Frequency shift method.
Uses singlemode fibres.
For distances up to 30 km and more.
Can be combined with singlemode communication transmission.
Raman vs. Brillouin sensing techniques.
Brillouin-based temperature/strain sensing.
Brillouin scattering is sensitive to strain and temperature.
Possibilities to be stimulated through dedicated optical
processing.
Requires singlemode optical fibers.
Offers greater distance range (up to more than 30km).
Advantage of frequency-based measurement technique.
More advanced measurement system.
Compatibility with singlemode fiber communication system
(sensing can be multiplexed with data transmission.
Applications and markets (general).
Oil and gas industries.
Pipelines, storage tanks, off-shore platforms, subsea
exploration…
Civil engineering.
Structural monitoring (dams, dikes, highways, ...).
Surveillance and Safety systems.
Tunnels, buildings, heating systems, waste disposal sites, power
cables, air-con systems, dikes
Land slide.
Environmental sciences.
Telecommunications.
Maintenance activities on fiber cables.