Submarine Device Branch Member Fiber Segmentation

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Solution Overview

Problem

As the transmission capacity of submarine cables increases, the existing submarine devices face limitations in accommodating the growing number of optical fibers, leading to reduced durability of the tail cables due to stress concentration at joints.

Innovation Solution

A submarine device is designed with a branch member that branches a main tail cable into multiple branch tail cables, each carrying a group of optical fibers, and these branch tail cables are introduced into the device main body through separate introduction parts, with the branch member being fixed to the device main body to prevent movement under external forces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the number of optical fibers in the submarine cable is increased to increase transmission capacity, then the transmission capacity is improved, but the tail cable durability deteriorates due to stress concentration at joints

Engineering Contradiction:
Improvetransmission capacityVSAvoidtail cable durability
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent divides the tail cable into multiple separate tail cables, each carrying a subset of optical fibers. Instead of having all optical fibers pass through a single joint in the main tail cable, the cable structure is segmented into multiple parallel tail cables that can be independently routed and fixed, distributing the stress and improving overall durability while maintaining high transmission capacity through the combined capacity of all tail cables.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces a cable support structure with multiple introduction parts as an intermediary component. This structure provides dedicated pathways and support points for each tail cable, allowing the tail cables to be properly routed and secured without creating stress concentration points. The intermediary cable support structure enables the tail cables to be fixed at multiple locations, preventing movement and reducing stress on any single joint.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Device complexity

If a single introduction part is used to introduce the tail cable into the device main body, then the device structure is simple, but the number of optical fibers that can be introduced is limited

Engineering Contradiction:
Improvedevice structureVSAvoidnumber of optical fibers
Core Design Contradiction:
Device complexityVSQuantity of substance

Solution Approach 1:

The patent divides the introduction function into multiple separate introduction parts, with each introduction part dedicated to receiving and routing a specific tail cable. This segmentation allows multiple optical fibers to be introduced simultaneously through different pathways, increasing the total capacity while keeping each individual introduction part relatively simple in structure.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent transitions from a single-point introduction approach to a multi-point introduction approach, utilizing spatial distribution across multiple introduction parts. By distributing the fiber introduction across multiple locations and pathways within the device main body, the system can accommodate more optical fibers without significantly increasing the complexity of any single introduction mechanism.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Ease of manufacture

If the branch member is not fixed to the device main body, then the installation process is simpler, but the tail cable durability deteriorates due to movement under external forces

Engineering Contradiction:
Improveinstallation processVSAvoidtail cable durability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent incorporates the fixation of the branch member as a preliminary action during the installation process. The branch member is pre-positioned and then fixed to the device main body before the tail cables are fully routed and secured. This preliminary fixation ensures that the branch member is stable and properly positioned from the start, preventing movement under external forces and ensuring long-term durability of the tail cable connections.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12210205B2Submarine device, method of configuring submarine device, and submarine cable system
Publication Date: 2025.01.28 NEC CORP
  • US12210205B2 patent drawing
  • US12210205B2 patent drawing
  • US12210205B2 patent drawing

AI summary

A submarine device includes a main tail cable connected to a submarine cable, a first branch tail cable including a first group of optical fibers among a plurality of optical fibers included in the main tail cable, a second branch tail cable including a second group of optical fibers among the plurality of optical fibers, a branch member that couples the main tail cable to the first and second branch tail cables and including therein a through hole for branching the plurality of optical fibers included in the main tail cable into the first group and the second group, and a device main body including a first introduction part for introducing the first branch tail cable into the device main body and a second introduction part for introducing the second branch tail cable into the device main body. The branch member is fixed to the device main body.