Optical fiber unit with communication and sensing functions and manufacturing method thereof

Abstract

The invention discloses an optical fiber unit with communication and sensing functions. The optical fiber unit comprises a tightly-wrapped optical fiber sensing unit, a plurality of precoated optical fibers and an optical fiber unit protective tube arranged on the outer portion in a loose mode, wherein the precoated fibers are reversely twisted on the tightly-wrapped optical fiber sensing unit and used for communication. The invention further discloses a manufacturing method of the optical fiber unit with the communication and sensing functions. The tightly-wrapped optical fiber sensing unit passes through a center hole of a wire distribution rotating disk driven by a reversible low speed motor, the precoated optical fibers penetrate through distributing holes in the wire distribution rotating disk to wind on the tightly-wrapped optical sensing unit to form optical fiber bundles, the optical fiber bundles are led into an optical fiber convergence device, an optical twisting device and optical fiber unit protective tube forming equipment are started, and the precoated optical fibers are twisted on the tightly-wrapped optical fiber sensing unit at a certain angle and in periodic reversing. The optical fiber unit enables communication transmission to be free of external interference while sensing sensitivities on the changes of external physical fields are also maintained, and the same optical fiber unit acquires the sensing and communication functions.

Description

technical field [0001] The invention relates to an optical fiber unit, in particular to an optical fiber unit with communication and sensing functions. [0002] The invention also relates to a method of manufacturing an optical fiber unit with communication and sensing functions. Background technique [0003] The distributed optical fiber measurement sensing system uses the optical fiber in the optical cable as the sensing element. On the continuous length of the entire optical fiber, the change of the sensed information with the direction of the optical fiber length is given in the form of a continuous function of distance. The optical fiber used also simultaneously For the transmission of sensed information. [0004] For the communication function of the optical cable, the design principle of its structure is to isolate the optical fiber in the cable from the external temperature, external force, vibration, humidity and other influences as much as possible, so as to ensur...

AI Technical Summary

Problems solved by technology

[0007] However, if some optical cables (such as OPGW, OPPC or sea optical cables, etc.) use multiple optical fiber units, it will have a significant impact on the structure, performance and cost of the cable, and it is urgently required that a single optical fiber unit has both communication and sensing functions

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