Coated conductive wire and multi-core cable

Insulated conductors and multi-core cables with controlled twist pitch variation, using a convolutional neural network to calculate twist pitch, address the issue of frequent sparking in automotive brake systems, improving cable reliability.

WO2026126378A1 Publication Date: 2026-06-18SUMITOMO ELECTRIC INDUSTRIES LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SUMITOMO ELECTRIC INDUSTRIES LTD
Filing Date
2024-12-11
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Conventional multi-core cables used in anti-lock braking systems (ABS), electric parking brakes (EPB), or electromechanical brakes (EMB) experience frequent sparking due to variations in twist pitch of the conductor strands.

⚗Method used

The development of insulated conductors and multi-core cables with a controlled twist pitch variation, utilizing a convolutional neural network to generate images that accurately separate strands and calculate twist pitch, ensuring a half-width of the twist pitch histogram is 0.6 times or less the median, thereby reducing sparking frequency.

🎯Benefits of technology

The solution effectively suppresses sparking in multi-core cables by accurately calculating and controlling twist pitch variation, enhancing their performance and reliability in automotive brake systems.

✦ Generated by Eureka AI based on patent content.

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Abstract

A coated conductive wire according to one embodiment of the present disclosure comprises a conductor part and a coating part. The coating part covers the conductor part. The conductor part is formed by twisting together a plurality of strands. The conductor part includes a conductor. The conductor is adjacent to the coating part. The direction in which the conductor part extends is defined as the Z direction. In the conductor, the half-width is 0.6 times or less the median. The half-width and the median are calculated from a histogram of the twist pitch of the conductor in the Z direction. When considering two cross-sections that are perpendicular to the Z direction and are separated from each other in the Z direction, the twist pitch is calculated on the basis of the displacement amount of relative positions of a strand between the two cross-sections, in relative coordinate systems having the conductor centroid in each cross-section as the origin. The distance between the two cross-sections is 1 mm. The histogram is created for a portion of the conductor having a length in the Z direction of 50 mm.
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