Carbon fiber lapped type strain sensor

A strain sensor and carbon fiber technology, applied in the sensing field, can solve the problems of poor resistivity stability, easy to be affected by the environment, difficult to make sensors, etc., and achieve the effect of improving stability and sensing sensitivity.

Inactive Publication Date: 2010-03-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the cement matrix is ​​a product of long-term hydration and is easily affected by the environment, the resistivit

Method used

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  • Carbon fiber lapped type strain sensor
  • Carbon fiber lapped type strain sensor
  • Carbon fiber lapped type strain sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a carbon fiber lap sensor includes: resin-based fixed-length carbon fiber 1, carbon fiber lap layer 2, conductive adhesive 3, electrode 4, backing plate 5, carbon fiber surface coated with conductive adhesive 3, and conductive adhesive with electrodes 4. The carbon fiber, resin, conductive glue and electrodes are fixed on the backing plate 5 to form a complete carbon fiber lap sensor, and the entire surface of the sensor is coated with a protective layer 6 . Wherein: the resin is epoxy resin or unsaturated resin; the conductive glue is silver glue material; the protective layer is ultraviolet-proof resin material.

[0033] In the carbon fiber lap strain sensor, the resin is used as the matrix and the adhesive, and the continuous carbon fibers with two overlapping ends are molded and solidified on the backing plate; at the end of the carbon fiber that is not overlapped, electrodes are provided through conductive glue, and the entire The sensor...

Embodiment 2

[0040] Embodiment 2: as figure 2 as shown,

[0041] It is basically the same as Example 1, except that the overlapping interface of Example 1 is a two-bundle fiber laminated structure, while the overlapping interface of Example 2 is a multi-bundle fiber laminated structure, forming a multi-layer fiber interface Sensitive layer, and an insulating layer 7 between the fiber bundle interfaces of the non-overlapping sections.

Embodiment 3

[0042] Embodiment 3: as image 3 as shown,

[0043] It is basically the same as Example 1, except that in Example 1, two bundles of carbon fibers are directly overlapped, while in Example 3, there is an interlayer 8 at the overlapping interface, and the interlayer material is selected from fixed-length continuous carbon fiber, chopped carbon fiber felt, or carbon fiber. fabric, or other conductive substances such as carbon black.

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Abstract

The invention belongs to the technical field of sensors, in particular relating to a carbon fiber lapped type strain sensor and a manufacturing process thereof. Through lapping two or more than two bundles of carbon fiber of a certain length with each other, a resin carbon fiber lapping layer is formed; the lapping layer is stressed to generate deformation so that the resistance is caused to change; and through utilizing an electrode arranged on the carbon fiber to collect the change of the resistance, the function of deformation sensing is realized. The carbon fiber lapped type strain sensoris characterized by high sensitivity, good stability, large coverage area and the like.

Description

technical field [0001] The invention belongs to the technical field of sensing, and in particular relates to a carbon fiber lap joint type strain sensor. Background technique [0002] Carbon fiber is a high-elastic and high-strength fiber material with conductive properties. The resistivity of continuous carbon fiber can change with the force of carbon fiber, but this change rate is very small, that is, the sensitivity of its sensing is very small. Therefore, the use of continuous carbon fibers as sensors has limitations. [0003] The carbon fiber is evenly dispersed in the cement matrix to form a cement-based carbon fiber-reinforced smart material. The resistivity of the material can produce a large change rate for force deformation, which means that its sensing sensitivity is relatively high. However, since the cement matrix is ​​a product of long-term hydration and is easily affected by the environment, the resistivity stability of the material is poor. Therefore, cemen...

Claims

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Application Information

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IPC IPC(8): G01B7/16
Inventor 朱四荣郑华升李卓球
Owner WUHAN UNIV OF TECH
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