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Fiber grating sensor, carbon fiber composite wire and manufacturing method

A technology of optical fiber grating and composite wire, which is applied in the direction of instruments, conductors, insulated conductors, etc., can solve the problems of insufficient sensitivity of optical fiber grating sensors, and achieve the effects of good protection of optical fibers, avoiding thermal stress, and good durability

Pending Publication Date: 2022-07-22
张鹏
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of insufficient sensitivity of the fiber grating sensor in the carbon fiber composite wire in the prior art, thereby providing a kind of fiber grating sensor, carbon fiber composite wire and manufacturing method

Method used

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  • Fiber grating sensor, carbon fiber composite wire and manufacturing method
  • Fiber grating sensor, carbon fiber composite wire and manufacturing method

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Effect test

Embodiment 1

[0043] refer to figure 1 , this embodiment provides a fiber grating sensor, including:

[0044] carbon fiber tube;

[0045] Optical fiber, on which the detection grating is engraved, and the optical fiber is inserted into the carbon fiber tube;

[0046] The carbon fiber sheet is filled between the carbon fiber tube and the optical fiber, and is solidified into one with the carbon fiber tube;

[0047] The fiber is wrapped by carbon fiber sheet to form prestress.

[0048] The above-mentioned optical fiber sensor includes an optical fiber engraved with a detection grating, and the optical fiber can detect the temperature and strain of the surrounding structure. The carbon fiber sheet is used to encapsulate the optical fiber. Since the expansion coefficient of the carbon fiber sheet is an order of magnitude larger than the expansion coefficient of the optical fiber, the sensitivity of the sensor detection will be improved; the carbon fiber tube packaged with the carbon fiber sh...

Embodiment 2

[0052] This embodiment provides a method for fabricating a fiber grating sensor, including the following steps:

[0053] S1. Cut the carbon fiber sheet into a long strip structure, lay it flat on the template 1 to form the first layer of carbon fiber layer, and make the length direction of the strip structure consistent with the optical fiber;

[0054] S2. Apply a layer of epoxy resin glue on the surface of the first carbon fiber layer;

[0055]S3. Lay a long carbon fiber sheet on the surface of the epoxy resin glue to form a second carbon fiber layer;

[0056] S4. Apply a layer of epoxy resin glue on the surface of the second carbon fiber layer, so as to form multiple carbon fiber layers alternately, and in this step, insert the optical fiber with the detection grating into the adjacent two carbon fiber layers, and keep the optical fiber in the prestressed state;

[0057] S5. Press the multi-layer carbon fiber layer with the second template, and extrude the excess epoxy res...

Embodiment 3

[0065] refer to figure 2 , this embodiment provides a carbon fiber composite wire, including:

[0066] carbon fiber mandrel;

[0067] The aforementioned fiber grating sensor, which is parallel to the carbon fiber core rod;

[0068] Aluminum stranded layer, the aluminum stranded layer wraps the carbon fiber rod and the fiber grating sensor to fix it.

[0069] In this embodiment, through the arrangement of the fiber grating sensor, the damaged part can be quickly and effectively detected when the wire is damaged. And using the aforementioned fiber grating sensor, the carbon fiber tube and the carbon fiber core rod are of the same material and have the same thermal expansion coefficient, which facilitates accurate measurement of the stress and strain of the core rod, avoids thermal stress generated between different materials, and improves sensitivity.

[0070] In addition, if the fiber grating sensor is damaged, because carbon fiber and optical fiber are both high-temperatur...

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Abstract

The invention relates to the technical field of carbon fiber composite wires, in particular to a fiber grating sensor, a carbon fiber composite wire and a manufacturing method. The fiber grating sensor includes: a carbon fiber tube; a detection grating is inscribed on the optical fiber, and the optical fiber is inserted into the carbon fiber tube; and the carbon fiber sheet layer is filled between the carbon fiber tube and the optical fiber, and the carbon fiber sheet layer and the carbon fiber tube are solidified into a whole. The carbon fiber composite wire comprises a carbon fiber core rod; the optical fiber grating sensor; and an aluminum stranded layer. According to the fiber grating sensor, the fiber is packaged by the carbon fiber tube and the carbon fiber sheet layer, so that the detection sensitivity can be improved. According to the carbon fiber composite wire, the sensor is packaged by the carbon fiber tube and the carbon fiber sheet layer, and the sensor and the core rod of the carbon fiber composite wire are made of the same material and have the same thermal expansion coefficient, so that the stress strain of the core rod can be accurately measured, thermal stress generated between different materials can be avoided, and the detection sensitivity is further improved.

Description

technical field [0001] The invention relates to the technical field of carbon fiber composite wires, in particular to a fiber grating sensor, a carbon fiber composite wire and a manufacturing method. Background technique [0002] Carbon fiber composite wire is a new structure of energy-saving capacity-enhancing wire. Compared with conventional wires, it has the advantages of light weight, good heat resistance, high conductivity, low line loss, large current carrying capacity, good corrosion resistance, and not easy to be covered with ice. And a series of advantages. The carbon fiber composite wire includes a carbon fiber core rod and its outer aluminum stranded layer. At present, most of the carbon fiber mandrels are single-core, which have weak bending, bending and splitting resistance. Once a small part is damaged, it is very easy to break the whole root, and because it is inside the aluminum stranded layer, it is not suitable to be found. [0003] Therefore, since 2014,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/3206G01L1/24H01B7/17H01B7/28H01B9/02H01B11/22
CPCG01K11/3206G01L1/246H01B7/17H01B7/2806H01B9/02H01B11/22
Inventor 张鹏苏亮宋佳蓉崔世青冯卓君李鹏
Owner 张鹏
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