Structural sensors for use in cryogenic environments Daniele Inaudi, CTO.

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

[email protected]

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