Multi-Core Cable Layout for Accurate Wire Disconnection Prediction
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Solution Overview
Problem
Existing multicore cables face challenges in predicting disconnection of electric power supply wires due to asymmetrical distribution of coated electric wires, making it difficult to accurately determine the magnitude of load and predict disconnections.
Innovation Solution
A multicore cable design with a detection wire disposed between two electric power supply wires and a sheath, ensuring equal load distribution and stable positioning, allowing for accurate prediction of disconnection by measuring electrical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the coated electric wires are disposed non-symmetrically in the multicore cable, then the cable structure becomes more compact and space-efficient, but the load distribution becomes uneven making disconnection prediction difficult
Solution Approach 1:
A detection wire is introduced as an intermediary element between the electric power supply wires. This detection wire experiences the same bending loads as the electric power supply wires and serves as a proxy for monitoring their condition. By measuring the electrical characteristics (resistance, impedance) of the detection wire, the system can predict disconnection of the electric power supply wires even when they are non-symmetrically arranged, thus resolving the contradiction between compact structure and prediction accuracy
Solution Approach 2:
The detection wire is designed to replicate the mechanical loading conditions experienced by the electric power supply wires. It is positioned and constructed to undergo identical bending stresses, effectively creating a copy of the stress state. This allows indirect measurement of the electric power supply wire condition through the detection wire, maintaining prediction accuracy despite non-symmetric arrangement
2Measurement precision
If the detection wire is positioned to experience equal load with electric power supply wires, then disconnection prediction accuracy improves, but the cable structure becomes more complex
Solution Approach 1:
The detection wire serves multiple functions simultaneously: it acts as a load-sensing element for disconnection prediction, provides structural support within the cable assembly, and can be integrated with existing cable routing. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in structural complexity while achieving improved prediction accuracy
Data Source
AI summary
A multicore cable includes a plurality of coated electric wires; a detection wire; and a sheath. The coated electric wires include an electric wire conductor and an electric wire coating. The electric wire conductor is a stranded wire of a plurality of electric wire filaments, and the electric wire coating covers an outer surface of the electric wire conductor. The detection wire includes a detection wire conductor that is a stranded wire of a plurality of detection wire filaments. The sheath covers an outer surface of a core that includes the coated electric wires and the detection wire. The coated electric wires include two electric power supply wires disposed so as to be next to each other, and the detection wire is disposed in a region enclosed by: the two electric power supply wires disposed so as to be next to each other; and the sheath.