TDR cables for landslides monitoring
In the recent years many companies started to use this technique in order to inspect landslides. Coaxial cables, cemented into the ground, are deformed by landslides movements and it is possible to detect and measure the deformation, thank to an impedance variation of cable’s sectors. The instrument’s detector send an electrical signal through the cable and it measure the time that the pulse need to come back. The return time is directly proportional with the distance between the detector (signal source) and the position of the impedance variation.