The protection method of optical fiber built in composite material

A composite material with built-in optical fiber technology, applied in the direction of fiber mechanical structure, can solve the problems of optical fiber damage, brittle and easy to break, etc., achieve good protection, reduce optical fiber damage rate, and improve work efficiency

Active Publication Date: 2016-05-18
SHANGHAI COMPOSITES SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As a pure optical fiber as a semiconductor material, there are shortcomings such as brittleness, easy fracture, slippage, etc., and the process of manufacturing composite materials, including the placement, fixing, composite material curing, and demolding of optical fibers, may cause damage to optical fibers. And slippage, so it is necessary to take protective measures to protect the fixed position of the optical fiber without affecting the subsequent detection

Method used

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  • The protection method of optical fiber built in composite material

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Embodiment 1

[0016] The manufacturing process of the built-in optical fiber composite material of this embodiment is as follows: figure 1 Shown: The prepreg layer of the composite material is first laid, and the optical fiber is placed on it (the inserted part of the optical fiber has been treated with surface protection), and then the prepreg layer is continued; after the layering is completed, the optical fiber part Carry out protection (cast silicone rubber after covering the demoulding step), and make a vacuum bag after curing at room temperature for 24 hours; after demoulding, the silicone rubber is demoulded, and then the composite material is demoulded.

[0017] The specific methods for the protection of the part of the inserted fiber and the part of the outgoing fiber are as follows:

[0018] 1) Insert part of the optical fiber protection:

[0019] The protection process is as follows: a layer of polymer film (acrylic film or polyimide film can be used, acrylic film is used in thi...

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Abstract

The invention discloses a method for protecting a built-in optical fiber of a composite material. The method comprises the following steps of: protecting an embedded optical fiber part, namely coating a layer of polymer film on the surface of the embedded optical fiber part; and protecting a leading-out optical fiber part, namely wrapping demoulding cloth on the leading-out optical fiber part, and packaging the leading-out optical fiber part by using silicon rubber for protection. After the embedded part of the composite material with the built-in optical fiber is protected, because the coating layer is relatively thin, the sensitivity of the optical fiber is not influenced; and repeated experiments prove that the leading-out part is well protected, the optical fiber damage rate of the composite material with the built-in optical fiber is greatly reduced, and working efficiency is improved.

Description

technical field [0001] The invention relates to the field of optical fiber intelligent composite material and structure manufacturing, in particular to a method for protecting an optical fiber built in a composite material. Background technique [0002] Fiber-reinforced resin matrix composites have excellent specific strength, specific stiffness, fatigue resistance and durability, and have been widely used in the load-bearing structures of aircraft. However, composites are very sensitive to damage due to the lack of reinforcement in the thickness direction. Efficient nondestructive testing technology is of great significance for damage inspection and continuous monitoring of composite material structures. Embedding optical fibers in fiber-reinforced composite structures can realize real-time health monitoring of composite structures, which has the characteristics of low cost, no electromagnetic interference, and the ability to monitor internal changes in the structure. Usi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
Inventor 李涛郝旭峰居建国
Owner SHANGHAI COMPOSITES SCI & TECH CO LTD
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