A method for improving the accuracy and stability of measuring the electrical performance of multi-core cables
By setting current contact points on both sides of the cable sample and fusing the two ends of the cable in a cup-shaped container using a low-melting-point metal or alloy, the problem of uneven current density in multi-core cables is solved, the accuracy and repeatability of resistivity measurement are improved, and the influence of mechanical force on the sample is reduced.
Patent Information
- Application Number
- CN202510058803.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for measuring the resistivity of multi-core cables suffer from uneven current density due to uneven contact resistance between cores, leading to inaccurate measurement results and poor repeatability.
The four-wire Kelvin method is adopted, with current contact points set on both sides of the cable sample and voltage contact points set on the inside. The two ends of the cable are fused in a cup-shaped container with a low melting point metal or alloy to form a stable electrical connection, avoiding mechanical clamping. The uniform conduction resistance of the low melting point metal or alloy is used to reduce the influence of contact resistance between the wire cores.
This method achieves a uniform distribution of current density among the cores, improves the accuracy and repeatability of resistivity measurements, reduces the influence of mechanical force on the electrical properties of the sample, and lowers the fluctuation of test results.
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Figure CN122410148A_ABST