Manufacturing method of small-cable-diameter optical cable, product of small-cable-diameter optical cable and on-line monitoring device

By monitoring and controlling the residual length and line release tension of optical fibers online, the problem of the attenuation of optical cables exceeding the standard in small cable diameters is solved, and the effect of synchronously improving the attenuation indicators while reducing the cable diameter is achieved, reducing production costs and defective rates, and is suitable for optical cable manufacturing of high-sensitive fibers.

CN119689664APending Publication Date: 2025-03-25YANGTZE OPTICAL FIBRE & CABLE CO LTD
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Patent Information

Application Number
CN202411948482.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The prior art is difficult to simultaneously improve the probability of attenuation exceeding the standard of small-cable cables while reducing the cable diameter, resulting in increased production costs and high defect rate. It is especially suitable for optical cable manufacturing applications of high-sensitive fibers.

Method used

By conducting online monitoring and targeted control of key indicators such as fiber excess length and wire release tension during optical cable manufacturing, the length of the fiber and sleeve is measured by online real-time detection, and the wire release tension is adjusted in real time to control it within the required range.

Benefits of technology

When reducing the cable diameter of the optical cable, ensure that the optical cable attenuation indicators meet the process requirements, reduce the use of casing materials and sheath materials, reduce production costs, and reduce the generation rate of defective products. It is suitable for optical cable manufacturing applications of high-sensitive fibers.

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Abstract

The invention belongs to the related field of optical communication transmission technology, and discloses a manufacturing method of a small-cable-diameter optical cable, in the secondary coating and cabling process of the optical cable, the lengths of a casing pipe in paying off and an optical fiber placed in the casing pipe are respectively detected on line, and the optical cable with the small cable diameter is obtained based on the difference value between the two lengths, namely excess length data. And the pay-off tension of the optical fiber and the sleeve is adjusted in real time so as to be controlled within a required range. The invention further discloses a corresponding product and an online monitoring device. According to the invention, under the condition of reducing the cable diameter of the optical cable, the attenuation standard exceeding probability of the small-cable-diameter optical cable can be synchronously improved, optical cable products with small cable diameters and qualified attenuation indexes can be obtained, correspondingly, not only can the usage amount of sleeve materials and sheath materials be effectively reduced, but also the optical fiber attenuation in the production process can be monitored on line, the generation rate of defective products can be reduced, and the production efficiency can be improved. Therefore, the optical cable is especially suitable for optical cable manufacturing and application occasions of high-sensitive optical fibers such as G.654 optical fibers.
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