In a German slab track system ('Feste Fahrbahn' FF, system Bögl) for speeds up to 300 km/h and more different fibre optic sensors have been embedded in several levels and locations of the track system. The track system consist of prestressed precast panels of fibre-optic-sensors - fibre Fabry-Perot and Bragg grating sensors - have been embedded very near to the interface of the layers. They are to measure the bond behaviour or the stress transfer in the track system. Measurements were taken on a full scale test sample (slab track panel of 6.45 m lenght) as well as on a real high speed track. The papet discusses aspects with regard to sensor design as well as the embedding procedure into the concrete track. Results from static and dynamic full scale tests carried out in the testing laboratory of BAM and from measurements on a track are given.
Strain monitoring of a high speed railway track using embedded fiber-optic sensors
Dehnungsmessung an Hochgeschwindigkeits-Eisenbahntrassen mittels eingebetteter faseroptischer Sensoren
2002
8 Seiten, 8 Bilder, 5 Quellen
Aufsatz (Konferenz)
Englisch
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