Optical Fiber Unit Inspection Device Width Measurement

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Solution Overview

Problem

Existing optical fiber unit inspection devices fail to reliably detect improper adhesion of binding materials, which can lead to instability and errors in mid-span branching and other operations.

Innovation Solution

An inspection device that measures the width of optical fiber units in orthogonal directions and uses bending portions to differentiate between properly and improperly adhered binding materials, determining the presence of abnormalities based on these measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If binding materials are wound in an SZ shape on optical fibers, then workability of mid-span branching is improved, but reliability of binding adhesion deteriorates

Engineering Contradiction:
Improveworkability of mid-span branchingVSAvoidbinding adhesion reliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent applies preliminary action by measuring the width of the optical fiber unit at multiple positions along its length before the binding adhesion problem occurs. This allows detection of width variations that indicate improper adhesion, enabling preventive measures to be taken before reliability issues manifest during mid-span branching operations.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by using measurement results from width detection to determine the binding state. The system continuously monitors the optical fiber unit width and provides feedback on the adhesion quality, allowing real-time assessment of binding reliability while maintaining the SZ winding configuration for operational flexibility.

Inventive Principle:
Principle #23Feedback

2Stability of the object's composition

If binding materials are spirally wound on optical fibers, then binding stability is improved, but ease of operation for mid-span branching deteriorates

Engineering Contradiction:
Improvebinding stabilityVSAvoidmid-span branching operation
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent measures the width of the optical fiber unit at multiple positions along its length to detect variations that indicate binding issues before they affect mid-span branching operations. This preliminary detection allows operators to identify stable versus unstable binding sections in advance.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system provides feedback on binding stability through width measurements, enabling operators to make informed decisions about where to perform mid-span branching operations. The feedback mechanism bridges the stability of spiral winding with the operational flexibility needed for branching.

Inventive Principle:
Principle #23Feedback

3Reliability

If multiple binding materials are adhered at reversal points, then detection of improper adhesion becomes necessary, but device complexity increases

Engineering Contradiction:
Improvebinding state monitoringVSAvoidinspection device structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical inspection systems with a simpler width measurement approach. By measuring the width of the optical fiber unit at multiple positions and analyzing variations, the system detects improper adhesion without requiring complex mechanical probes or sensors that would increase device complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the measurement parameter from direct adhesion strength measurement to width variation measurement. This parameter change simplifies the inspection device while maintaining reliability, as width variations serve as an indirect but effective indicator of binding adhesion quality at reversal points.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP3502759B1Device and method for inspecting optical fiber unit
Publication Date: 2021.08.25 FUJIKURA LTD
  • EP3502759B1 patent drawingFigure 1
  • EP3502759B1 patent drawingFigure 2A
  • EP3502759B1 patent drawingFigure 2B~3A

AI summary

An inspection device of an optical fiber unit inspects an optical fiber unit in which a plurality of binding materials are wound in an SZ shape on a plurality of optical fibers. The inspection device of an optical fiber unit includes a measurement unit that is configured to measure a width of the optical fiber units in a first direction orthogonal to a longitudinal direction in which the optical fiber unit extends; and a determination unit that is configured to determine presence or absence of an abnormality in a binding state, based on a measurement result of the measurement unit.