METHOD FOR DETECTING TWIST IN CABLE, POWER SUPPLY CABLE WITH TWISTING SENSOR AND METHODS OF MAKING SUCH CABLE Russian patent published in 2017 - IPC G01L3/12 

FIELD: electricity.

SUBSTANCE: invention describes a method for tracking the status of the twisted cable, which has a central longitudinal axis. The method comprises the steps of: providing a cable comprising a torsion sensor, extending longitudinally along the cable. Mentioned twisting sensor comprises a single mode optical fibre placed substantially along the central longitudinal axis of the cable, and at least three longitudinal structural element. Furthermore, at least one of the longitudinal structural elements forms a conductive wire. Twisting sensor mechanically connected to at least one of the longitudinal structural elements; measured twisted state mode optical fibre using a polarization-sensitive optical reflectometry and associated cable twisted state along a longitudinal axis with a measured state twisted single mode optical fibre.

EFFECT: tracking the twist during use and providing a reliable measure of the actual placement of the cable, which may be performed periodically.

12 cl, 8 dwg