the passive fiber optic cable, which until now has only been used for data transmission, becomes a long chain of tens of thousands of sensors that detect vibrations and ambient noise along the railroad….forms the nervous system of an acoustic, digital twin of the rail network
Most railway tracks already utilize pre-existing, trackside fiber optic cable infrastructure, which makes fiber optic train and rail monitoring incredibly advantageous.
ASELSAN MIDAS-(R)ailway Multi Purpose Intelligent Distributed Acoustic Sensor rewarded with the "Best Innovation Award 2020" in big companies category in 6th ERCI Innovation Awards - using DAS technology to collect acoustic data and analyze it to detect intrusions on the railway
Using a system supplied by Frauscher, a fiber-optic cable is laid along the line, which uses rail defectoscopy to detect cracks or breaks in the rail by picking up the vibrations produced by the train passing by.
Acoustic Sensing - A train’s vibration pattern as it progresses its journey is picked up by lineside sensing equipment, usually a fiber optic cable....Installations exist worldwide, including on Network Rail and London Underground.