smart sleepers consolis - strängbetong railmoving towards predictive maintenance smart sleepers®...
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CONSOLIS 31 Place Ronde - Quartier ValmyLa Défense 92800 PuteauxFranceTel: +33 (0)1 46 53 24 00www.consolis.com
SMART SLEEPERS®
Moving Towards Predictive Maintenance
SMART SLEEPERS®
SATEBA, CONSOLIS’ French subsidiary and the European leader in concrete sleepers manufactur-ing, and CEMENTYS, a French company specialized in infrastructure monitoring, have joined forces to develop an innovative track monitoring solution: the SMART SLEEPERS®.
The SMART SLEEPERS® are prestressed mono-block concrete sleepers equipped with Microlux sensors.
These sensors are embedded horizontally in the sleeper in the center and in the rail seats. They allow the SMART SLEEPERS® to gather static or dynamic data on the mechanical behaviour of the railway track when subjected to rolling stock loads.
SMART SLEEPERS® A Concrete Sleeper with Accurate and Resistant Embedded Sensors
The Microlux sensors have the following characteristics: • Resistant to weather, heat and cold and shocks and
vibrations•Accurate, reliable and durable (lasting up to 50 years)•Not subject to electromagnetic interference
BeLgIumCONSOLIS Services Co Chaussée de la Hulpe, 120 BE - 1 000 Brussels Tel: +32 2 290 3600www.consolis.com
eStONIaaS SWetRaKTammi tee 51 - Harku EE - 76 902 Harju Maakond Tel: +372 6 71 2500 Email: [email protected]
FINLaNdPaRma RaILPL 76 - Hiidenmäentie 20 FI - 03 101 Nummela Tel: +358 20 577 5500 Email: [email protected] www.parma.fi
FRaNCeSateBaQuartier Valmy - 31, place Ronde FR - 92800 Paris La Défense Tel: +33 (0)1 46 53 29 00 www.sateba.com
geRmaNydW SChWeLLeN gmbhHeerdterbuschstrasse 8 D - 41 460 Neuss Tel: +49 (0)2131 / 186-0 Email: [email protected]
LIthuaNIauaB SWetRaKGamyklų str. 1 - LT-68108 Marijampole Tel: +370 343 98712 / +370 5 2133479 Email: [email protected] www.swetrak.lt
mOROCCOSateBa maROCImmeuble 1 - Zénith 1 - 1er étageSidi Maarouf - 20 000 Casablanca Tel: +212 522 78 78 68
NORWaySPeNNCON RaIL aSHensmoveien 98 -3516 Hønefoss
POLaNdWPSWytwórnia Podkładów Strunobetonowych S.A. Mirosław Ujski 51 - 64 850 Ujście Tel: +48 67 28 40 340www.wps-sa.com.pl
PORtugaLSatePOREdificio Coopali - Rua José Afonso 4-C, 1° PT-1600-130 LISBON - (São Domingos de Benfica) Tel: +351 217 200 670
SeRBIaRaj SChWeLLeN dOO28, Octobra 66 - 13 320 Velika Plana Tel: +381 (0)26 515 140 Email: [email protected]
SWedeNStRäNgBetONg RaIL aBGjörwellsgatan 30 - 112 60 Stockholm Tel: +46 (0)8 615 82 00 Email: [email protected]
the NetheRLaNdSSPaNBetON B.v.Hoogewaard 207 / 209 NL - 2 396 AS Koudekerk a/d Rijn Tel: +31 (0)71 342 02 00 Email: [email protected] www.spanbeton.nl
uKSBC RaILLittlewell Lane - Stanton-by-Dale Ilkeston - Derbyshire - UK - DE74QW Tel: +44 (0)115 944 1448 Email: [email protected] www.stanton-bonna.co.uk
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After calibration, the sensors are able to measure the extent to which the SMART SLEEPERS® are bent in each location, providing instant and accurate measurements on the sleeper’s mechanical behavior.
Thanks to these measurements, the track can be immediately checked for the effects of the following: • Rolling stock speed•Under-sleeper pads, rail pad stiffness•Sleeper spacing•Ballast and platform quality•The Rail fastening system
The sensors can also improve monitoring. • They provide better knowledge of S&C bearers behaviour.•The characteristics of specific areas, such as tight-radius curves,
splice bars and expansion joints, are clearer.•They allow the design of the sleeper (length, etc.) to be optimized.
In the long term, these real-time measurements provide critical data on the mechanical behaviour of the railway track.This monitoring reveals the state of the ballasted track at any given time, how it changes and the exact manner sleepers lay on the ballast.The data collected by the SMART SLEEPERS® can be used for predictive main-tenance, reducing the need for costly preventive and corrective maintenance operations.
Track measurements provide information on how sleepers react to the following in the long term:•TEMPERATURE: ballast freezing, rail pad stiffening in cold weather, etc.•TRACk MAINTENANCE: before and after tamping, before and after
rail milling, etc.
Delivered in 2014, the first SMART SLEEPERS® will be in operation in 2015 on France's eastern SNCF high-speed line extension.
•DURABLE The Microlux sensors are embedded, not glued, in the concrete sleepers. Protected during the sleeper’s entire lifespan (up to 50 years), the sensors are very robust and resistant (as are the cables, connecting components, etc.).•UNOBTRUSIVE
The sensors are not intrusive (<0.05%) and do not affect the track’s mechanical properties.•RELIABLE
The Microlux sensors use fiber optics. A similar technology has been used for years in other industries, such oil and gas, construction and healthcare.•HIgH-QUALITY MEASUREMENTS
The measurements are accurate, reliable, linear and repeatable. The same quality is achieved whether the measurement is static or dynamic.•MULTIPLExINg
The technology allows for long-distance multiplexing of up to 15km.
The FBg is the sensing element in the Microlux sensor.A light source shines a light into the optical fiber. The FBg reflects the spectral component which satisfies the Bragg condition, a monochromatic Bragg wave-length that is analyzed by a data logger. When the FBg is subjected to changes in strain, the measurement causes a shift in the Bragg wavelength.Depending on the characteristics of the data logger used, the FBg enables dynamic measurements in the tens of kHz to be recorded.The FBg reports the frequency not the intensity. The signal can therefore be analyzed even if it weakens. Consequently, up to 20 sensors can be multiplexed to a single optical fiber con-nected to the data logger. It is possible to plug and unplug the sensors without interfering with the measurements
LoNG-TERM MoNiToRiNGiNSTANT MEASuREMENTS
MiCRoLuX SENSoRS
Moving Towards Predictive Maintenance
The Best Possible Railway Track Monitoring
Embedded Fiber Bragg Grating (FBG) Sensors
FBG Operating Principle