Composite Cable Layout for Noise-Resistant Diameter Reduction
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Solution Overview
Problem
Conventional composite cables experience a decrease in resistance to external noise when the twist of the twisted pair wires collapses due to a reduction in diameter.
Innovation Solution
A composite cable design featuring a plurality of power lines, one signal line unit with pairs of signal lines arranged at opposing vertices of a polygon, and an inner sheath covering the signal lines, which are twisted together to maintain a reduced diameter while suppressing noise resistance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the diameter of the composite cable is reduced by twisting the twisted pair wires, then the cable becomes more compact and easier to install, but the resistance to external noise decreases
Solution Approach 1:
The patent applies nesting by placing the twisted pair wires inside an inner sheath, which is then covered by an outer sheath. This nested structure allows the cable to maintain a compact diameter while the inner sheath provides continuous protection for the signal lines, preventing noise interference even when the outer cable is twisted or bent.
Solution Approach 2:
The cable is segmented into distinct functional layers: signal lines are separated from power lines by the inner sheath, and the entire assembly is protected by the outer sheath. This segmentation isolates sensitive signal lines from electromagnetic interference generated by power lines and external sources, maintaining noise resistance in a compact configuration.
2Ease of manufacture
If multiple power lines and signal lines are collectively covered with a sheath, then the cable structure is simplified and easier to manufacture, but the cable diameter increases
Solution Approach 1:
The patent uses a nested structure where the inner sheath contains the signal lines and twisted pair wires, and the outer sheath encompasses the entire assembly. This nesting allows all conductors to be protected by sheaths without requiring a large-diameter single sheath, as the inner components are compactly arranged before being covered by the outer protection layer.
Data Source
AI summary
A composite cable includes a plurality of power lines, one signal line unit, and a sheath collectively covering the plurality of power lines and the one signal line unit. The signal line unit includes a plurality of pairs of signal lines, and an inner sheath covering a first assembled article. The first assembled article is formed by arranging the signal lines to be paired at each pair of opposing vertices of a polygon with an even number of vertices in a cross-section perpendicular to a longitudinal direction of the signal line unit and twisting all the signal lines together.