Apparatus and method for determining ground stability measurements by utilising a distributed optical sensor 12. A first static strain is determined at a location along the length of the distributed optical sensor and detecting a variation in strain at a location caused by an active source. A second static strain is determined at a location after the variation in strain caused by the active source has ended. The difference between the first and second static strains is determined. The detection of variation in strain may be performed by detecting higher frequency variations in strain. The relative strength of the active source may be determined based on the higher frequency variations in strain. The difference between the first and second static strains may be normalised. An indication of ground stability may also be based on a plurality of differences between first and second strains. The active source may be a train and the distributed optical sensor may be associated with train tracks. An interrogator 10 may be optically coupled to the optical fibre and may be configured to transmit and detect optical signals into the and from the optical fibre.
GROUND SENSING UTILISING ACTIVE SOURCES
BODENERFASSUNG UNTER VERWENDUNG AKTIVER QUELLEN
DÉTECTION DU SOL UTILISANT DES SOURCES ACTIVES
2023-12-13
Patent
Electronic Resource
English
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