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FBG (Fiber
Bragg Grating Sensors)
"
The Most Important Innovation of the 1990s in optica fiber sensing is the
development of Fiber Grating Sensors"
Fiber Bragg Gratings reflect a narrow
spectral part of light that is guided in the fiber core at the Bragg wavelength,
which is dependent on the grating period and the refractive index of the fiber.
The grating period is sensitive to mechanical strain and temperature. What
distinguish the FBG sensor from conventional electrical strain gauges is its
excellent linear characteristics, immune to Electromagnetic Interference (EMI),
low fiber loss (transmission over many kilometers), highly multiplexed
distributed sensor arrays and intrinsic safe in explosive environments)
Features
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stable and durable
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can be highly
multiplexed (many sensing points in one single fiber cable)
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low fiber loss
-
metal-Seal technology
(patent pending)
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stand alone or
distributed Array
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immune to EMI
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cost efficient
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Application
- Strain measurement for
civil structure , steel and cement structure
- Continuous monitoring
of structural health of ships and aircraft, building, bridge, tunnel
etc
- Risk and damage
assessment for bridges , road and dams in earthquake zone
- Down-hole oil pressure
and temperature sensing
- Deep-sea oil platform
riser monitoring
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