METHOD FOR CONTROLLING THE DEPTH OF LAYING AN OPTICAL CABLE Russian patent published in 2021 - IPC G01B17/00 G01B11/00 

FIELD: measuring.

SUBSTANCE: invention relates to measuring equipment and can be used for controlling the depth of laying an optical cable, including a cable without conductive elements. Essence: the source of directed acoustic impact is placed on the surface above the cable, and the backscattering characteristic of the optical fibre is measured using a phase-sensitive pulse optical reflectometer. The cable is therein subjected to the impact of an acoustic signal at the same frequency. The source of directed acoustic effect is moved along the normal to the axis of the optical cable in one direction from the cable, and the backscattering characteristics of the optical fibre are measured using a phase-sensitive pulse optical reflectometer at three points located along the normal to the axis of the optical cable at a distance . Based on the results of processing the backscattering characteristics of the optical fibre, measured by the phase-sensitive pulse optical reflectometer, the signal delay time at the impact frequency is determined at a point on the fibre axis corresponding to the intersection with the normal, along which the source of acoustic impact is moved when the source of acoustic impact is placed at a distance relative to the signal received for this point when the source of acoustic impact is placed at a distance . The depth of laying the optical cable is determined by solving the equation

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EFFECT: expanded scope of application.

1 cl, 1 dwg