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.
Fiber optic sensors, which work on the basis of Distributed Acoustic Sensing (DAS), provide comprehensive access to a wide range of information surrounding the railway....These solutions allow an overview of the entire railway network, including rolling stock, to be formed in real-time.
Frauscher Sensor Technology USA exhibited at the ASLRRA (American Short Line Railroad Association) 2019 Connections Convention, April 7-9 in Orlando, Florida. Representatives from Frauscher’s Technical Sales and Engineering teams were on hand to showcase wheel detection and axle counter products.
Fiber optic sensing technology converts cables installed alongside transport infrastructure, such as railroads or highways, into an array of thousands of sensors which can detect acoustics, temperature or strain signals by using optical sensing techniques.