Verfahren und System zur Bestimmung der Verformung in einem Kabel

Details

Veröffentlichungs-Nr.

EP3879234

Aktenzeichen

EP20305254

Anmeldetag

11. März 2020

Veröffentlichung

31. Juli 2024

Erteilung

31. Juli 2024

Rechtsraum

EP

IPC

G01D5/353

Abstract

A method and system for determining deformation in a cable 110, wherein a sensing optical fiber arrangement is applied along the cable 110. The method comprises injecting a forward pulse pump signal in the optical fiber in a forward direction of the optical fiber; injecting a reverse probe signal in the optical fiber in a reverse direction of the optical fiber; measuring a stimulated Brillouin backscattering; and based on the Brillouin backscattering measurement, providing information about a deformation of the cable. The forward pulse pump signal is provided as a sum of a stationary signal component and an interrogation pulse component, and advantageously, the stationary signal component has an energy below a Brillouin activation level and the interrogation pulse signal component has an energy which results in that the sum of the stationary signal component and the interrogation pulse signal component exceeds the Brillouin activation level. The method and system may be used during deployment of a subsea power cable 110 to a sea bottom 100 from a cable reel 130 positioned on the deck of a cable-laying vessel 120 floating on a sea surface 140.

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Firma

Nexans

Land

🇫🇷 Frankreich

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