Cable foaming layer uniformity detection method and system

Abstract

The invention discloses a cable foaming layer uniformity detection method and system. The method comprises the following steps: acquiring an internal imaging image of a cable through X-ray flaw detection equipment; dividing the internal imaging image into a plurality of sub-domain images according to an edge curve obtained by detecting the edge of the internal imaging image; identifying a foaming layer area in the internal imaging image according to the domain image; detecting and judging whether a foam structure in the foaming layer area is uniform or not; when the foam structure in the foaming layer area is not uniform, the cable is judged to be an unqualified product, otherwise, the cable is a qualified product, the uniformity detection of the cable with any length can be realized, so that the unqualified cable which cannot ensure that the cable has uniform transmission impedance can be identified; and the limitations of fixed length, large interference, very high distortion degree and the like of the cable in water capacitance measurement are removed, and the cable does not need to be damaged, so that the problem of non-destructive detection of the capacitance stability of the cable is solved, and the transmission bandwidth, transmission rate and data transmission stability of the cable are ensured.

Description

technical field [0001] The disclosure belongs to the field of wire and cable and product testing, and in particular relates to a method and system for testing the uniformity of a cable foam layer. Background technique [0002] At present, the core wire of the twisted pair generally uses three to four layers of materials, generally including plastic PE, foam layer, high-density PE, etc. The structure of the foam layer is a sponge-like structure full of bubbles. During the dynamic measurement process of the core wire, the water capacitance tester is generally used to measure the capacitance per unit length of the control cable to ensure that the cable has a uniform transmission impedance; however, the water capacitance instrument cannot accurately measure the capacitance, but by measuring the capacitance The method has restrictions on the length of the cable. If the capacitance measurement exceeds a certain length, the degree of distortion will be high, the interference will b...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a method and system for detecting the uniformity of the cable foam layer to solve one or more technical problems in the prior art, and at least provide a beneficial option or create conditions

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