Optical Cable Internal Module Extraction for Repair

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Solution Overview

Problem

Existing optical cables face issues with repair, as damage to internal optical fibers leads to discontinuity and degradation of optical transmission quality due to the need for soldering new portions, which complicates maintenance and can introduce performance issues.

Innovation Solution

The optical cable design allows for the internal optical cable to be easily extracted from its tube, enabling replacement without cutting or soldering, by providing sufficient play within the tube, facilitating the insertion of a new cable and connection using conventional means, thus maintaining optical performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of repair

If the internal optical cable is soldered to replace damaged sections, then the cable can be repaired, but optical transmission quality deteriorates due to discontinuity

Engineering Contradiction:
Improvecable repairabilityVSAvoidoptical transmission quality
Core Design Contradiction:
Ease of repairVSReliability

Solution Approach 1:

The optical cable is divided into modular components: main optical fiber modules that can be independently extracted and replaced, and an internal optical cable that runs through the center. This segmentation allows damaged sections to be replaced without affecting the entire cable structure, maintaining optical transmission quality while enabling easy repair.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The internal optical cable is designed to be extractable from its protective tube without soldering or complex joining operations. The cable can be completely removed and replaced as a single unit, eliminating the need for intermediate soldering steps that would create discontinuities and degrade optical performance.

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of repair

If the internal optical cable is soldered to replace damaged sections, then the cable can be repaired, but maintenance complexity increases

Engineering Contradiction:
Improvecable repairabilityVSAvoidmaintenance complexity
Core Design Contradiction:
Ease of repairVSDevice complexity

Solution Approach 1:

The internal optical cable is designed to be extractable from its protective tube without soldering or complex joining operations. The cable can be completely removed and replaced as a single unit, eliminating the need for intermediate soldering steps that would create discontinuities and degrade optical performance.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The damaged internal optical cable can be completely extracted and discarded, replaced by a new cable without requiring preservation of any sections or complex joining operations. This simplifies maintenance by allowing complete replacement rather than partial repair with soldering.

Inventive Principle:
Principle #34Discarding and recovering

3Stability of the object's composition

If the internal optical cable is tightly fixed in the tube, then structural stability is improved, but extractability for repair is reduced

Engineering Contradiction:
Improvestructural stabilityVSAvoidcable extractability
Core Design Contradiction:
Stability of the object's compositionVSEase of repair

Solution Approach 1:

The internal optical cable is positioned within the protective tube with sufficient play or movement freedom, allowing it to be extracted when needed for repair. This dynamic design enables the cable to be removed and replaced without requiring complex disassembly operations, while still maintaining structural stability during normal operation.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP2461195B1Optical cable for connecting to a general distribution network including an internal optical cable
Publication Date: 2019.07.24 NEXANS SA
  • EP2461195B1 patent drawingFigure 1
  • EP2461195B1 patent drawingFigure 2
  • EP2461195B1 patent drawingFigure 3

AI summary

The cable (101) has a protective envelope (2) enclosing main optical fiber modules (1). An inner optical cable portion (3) is arranged inside the envelope. The cable portion comprises a protective envelope that encloses inner optical fiber modules (31), where each inner module comprises optical fibers enclosed by an external sheath. The cable portion extends inside a tube (4). The cable portion has an adequate gap inside the tube for extracting the cable portion from the tube. The main modules are arranged around the tube. An independent claim is also included for a method for repairing an inner optical cable portion of an optical cable.