Multicore Coaxial Cable Grounding for Smaller, Flexible Routing
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Solution Overview
Problem
Conventional multicore cables with multiple coaxial wires face challenges in achieving both a small diameter and high flexibility, particularly when used in applications like multijoint robots or medical catheters.
Innovation Solution
The design incorporates coaxial cables with exposed outer conductors that are electrically grounded by contacting a grounding conductor, allowing for reduced cable diameter and enhanced flexibility, while maintaining effective electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional multicore cables with multiple coaxial wires are used, then electrical connectivity is maintained, but cable diameter is large and flexibility is poor
Solution Approach 1:
Multiple outer conductors from different coaxial cables are merged into a single common grounding conductor. This consolidation reduces the overall cable diameter while maintaining electrical connectivity through the shared grounding path, resolving the contradiction between compact size and reliable electrical connection.
Solution Approach 2:
The common grounding conductor serves multiple functions: it provides electrical grounding for multiple coaxial cables simultaneously and acts as a structural element that binds the cables together. This multi-functionality allows reduction in cable diameter while preserving electrical connectivity.
2Ease of operation
If conventional multicore cables with multiple coaxial wires are used, then electrical connectivity is maintained, but flexibility is reduced
Solution Approach 1:
By merging multiple outer conductors into a single common grounding conductor, the cable structure becomes more flexible while maintaining electrical connectivity. The reduced number of separate conductive elements allows greater flexibility without compromising the grounding function.
3Reliability
If outer conductors are covered by insulation, then electrical isolation is improved, but electrical grounding becomes difficult
Solution Approach 1:
The outer conductors are extracted from their insulating coverage at specific locations to create contact points with the common grounding conductor. This selective exposure maintains electrical isolation where needed while enabling grounding where required, resolving the contradiction between isolation and grounding.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables a multicore cable with a reduced diameter and improved flexibility, simplifying system configuration and reducing operational man-hours, while preventing impedance mismatch and signal degradation.
Implementation Method 1
each of the outer conductors of the coaxial cables is electrically grounded by contacting the grounding conductor or the outer conductor of another one of the coaxial cables
Data Source
AI summary
A multicore cable is provided with coaxial cables, each of which includes an inner conductor, an insulator covering around the inner conductor, and an outer conductor arranged around the insulator. The outer conductor is exposed, and the outer conductors of some of the coaxial cables are covered by grounding conductors that are to be electrically grounded. Each of the outer conductors of the coaxial cables is electrically grounded by contacting the grounding conductor or the outer conductor of another one of the coaxial cables.