METHOD FOR DETECTING TORSION IN A CABLE, ELECTRIC CABLE WITH TORSION SENSOR AND METHOD FOR MANUFACTURING SAID CABLE

摘要

The present disclosure describes a method for monitoring a torsional state of a cable having a central longitudinal axis, the method comprising: providing a cable including a torsion sensor longitudinally extending along the cable, said torsion sensor including a single-mode optical fibre arranged substantially along the central longitudinal axis of the cable, and at least three longitudinal structural elements, at least one of the longitudinal structural elements being an electrically conductive core, wherein the torsion sensor is mechanically coupled with at least one of the longitudinal structural elements; measuring a torsional state of the single-mode optical fibre by polarisation- sensitive optical reflectometry, and associating the torsional state of the cable along the longitudinal axis with the measured torsional state of the single-mode optical fibre. The present disclosure relates also to a method of manufacturing an electric cable and to an electric cable.