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Structural sensors for use in cryogenic environments Daniele Inaudi, CTO
SMARTEC SA
Part of Roctest Group / Nova Metrix World’s largest supplier of structural health
monitoring systems World’s largest supplier of fiber optic sensors Offices in Canada, US, Switzerland, UK, France Supply of sensing HW and SW components,
SHM systems and associated services Experience in sensing for cryogenic and
radiation environments: CERN, ITER, instrumentation of superconductive magnets, LNG tanks and pipelines, nuclear power plants, nuclear waste disposal
Fiber optic Sensors: Why?
Small size Great variety in the measurable parameters Distributed and Multiplexed topologies Insensitive to external perturbations Reliability in demanding environments Long-distance remote monitoring Compatible with data-transmission network
Point Sensor:
Sensoptic (Fabry-Pérot)
Distributed: DiTest / DiTemp (Brillouin and Raman)
Long base:
SOFO
Quasi distributed (multiplexed):
MuST (FBG)
Fiber Optic Sensor Types
Distributed Sensing
FF
e
T1
Position [m]Str
ain
[m
e]
Reading Unit
Distributed Sensor0m
1m 100m
1000m
20km
T1
e
T2
T2
Position [m]
Tem
p. [°
C]
ITER projects
Qualification and production of fiber-optic sensors for the monitoring of superconductive magnets:StrainSmall displacement (contact)Large displacement (contact)Laser-distance-meters: contactless displacement
Point temperaturesDistributed temperatures
Fabry – Perot FO sensor for ITER
FBG FO sensors for ITER
Qualification for cryogenic conditions
Strain and Displacement sensors welded on test support during test at nytrogen temperature
Non-contact: Laser Distance Meter
Distributed T Testing
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For more informationwww.roctest-group.com
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