Leakage coaxial optical fiber cable with double-steel-wire reinforced inner conductor and method for making same

Abstract

The leaky coaxial cable with dual steel wire strengthening inner conductor has plastic hollow tubes with strength steel wire at both ends as mechanical support, the central line of two steel wires and plastic hollow tube on the same surface, to ensure the setting of the leaky coaxial cable not being twisted. The vertically wrapped copper and foil compound strip outside the plastic hollow tube to form the inner conductor of the leaky coaxial cable, saving a lot of copper. There are many oil filled fiber optic bundled tube inside the inner conductor, being able to form a communication system with high quality vehicle and road photographic conversion, ensuring the running safety of the vehicle. Outside the inner conductor, there is the extruded plastic physical foaming insulating layer on which vertically strained with periodic radiating groove cooper band, forming the outside conductor of the leaky coaxial calbe with protective sheath. It dramatically reduces copper consumption, with increased anti stretch strength, being able to ensure the radiating groove facing the antenna of the vehicle permanently, with reliable coupling stability, and great economic benefits.

Description

technical field [0001] The invention relates to the technical field of rail transit vehicle-ground communication. Specifically, it is a leaky coaxial optical cable with double steel wire reinforced inner conductor used in high-speed railway vehicle-to-ground communication and its manufacturing method. Background technique [0002] At present, there are two kinds of inner conductors of leaky coaxial cables used in rail transit vehicle-to-ground communication. One is metal copper tubes, which need to consume hundreds of kilograms of high-purity electrolytic copper. Due to the increasing scarcity of copper resources, the price of copper has increased several times in the past two years, so the inner conductor made of copper tubes is expensive and must be improved. Another kind of inner conductor is composed of copper-clad aluminum wire. Its tensile strength is low, and it is easy to stretch and deform during construction, which makes the characteristics of the entire leaky coa...

AI Technical Summary

Problems solved by technology

One is metal copper tubes, which need to consume hundreds of kilograms of high-purity electrolytic copper. Due to the increasingly scarce copper resources, the price of copper has increased several times in the past two years, so the inner conductor made of copper tubes is expensive and must be improved.

Another kind of inner conductor is composed of copper-clad aluminum wire. Its tensile strength is low, and it is easy to stretch and deform during construction, which makes the characteristics of the entire leaky coaxial line worse. The leaky coaxial line with the above two inner conductors is in the It is easy to reverse during the construction process, so that the radiation trough of the leaky coaxial line is not in a straight line, causing large fluctuations in the coupling loss between the leaky coaxial line and the locomotive antenna, and greatly increasing the bit error rate of the vehicle-ground communication

In addition, neither of these two kinds of leaky coaxial cables can be made into optical cables containing optical fiber bundles, and cannot make optical fiber transmission and leaky cable radiation transmission organically form a highly stable vehicle-to-ground communication system.

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