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On-line carbon fiber stability monitoring device and on-line carbon fiber stability monitoring method

A monitoring device and carbon fiber technology, applied in the field of carbon fiber, can solve problems such as poor timeliness and inability to achieve long-distance full inspection, and achieve the effect of ensuring effective judgment, ensuring non-destructive testing and stability, and fast feedback

Active Publication Date: 2015-02-04
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems that the existing carbon fiber testing device and method can only detect the products after production, and cannot achieve long-distance full inspection and poor timeliness, the present invention provides an online monitoring device and method for carbon fiber stability

Method used

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  • On-line carbon fiber stability monitoring device and on-line carbon fiber stability monitoring method
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  • On-line carbon fiber stability monitoring device and on-line carbon fiber stability monitoring method

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Experimental program
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Effect test

Embodiment 1

[0031] The device is located between carbonization and surface treatment.

[0032] Design parameters: Tow spacing: 10mm (center distance between adjacent tows), 4-5mm (net distance between adjacent tows)

[0033] Tow width: 5-6mm; effective test length: 200-400mm; DC voltage: 6-12V, (using constant voltage power supply) scope of application: T800-6K / 12K; current measurement accuracy: 1mA

Embodiment 2

[0035] Taking T800-6K carbon fiber as an example, the theoretical resistance calculation is performed as follows:

[0036] Calculation formula: Tow amount: 6K; single wire diameter: 5.10μm; resistivity ρ: 1.4×10 -3 Ω·cm; length l: 1.0m; A is the cross-section of the tow; it can be known by calculation that R=120Ω.

[0037] Therefore, the theoretical resistance of T800-6K carbon fiber tow is 120Ω / m; calculated according to this, the theoretical resistance of T800-12K carbon fiber tow is 60Ω / m.

[0038] According to the above calculation results, by installing an online resistance measurement and control system at the end of the carbonization process of the carbon fiber production line, the resistance test of carbon fiber products can be realized, and real-time detection can be achieved, and evaluation can be made according to the change of resistance of each bundle of fibers Long-distance, inter-axis and batch-to-batch stability of the product, rapid recording and feedback o...

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Abstract

The invention relates to an on-line carbon fiber stability monitoring device and an on-line carbon fiber stability monitoring method. The device comprises a bracket, a power supply, a measurer, a positive electrode roller and a negative electrode roller, wherein the positive electrode roller and the negative electrode roller are fixedly arranged on the bracket and are arranged in sequence along the running direction of carbon fibers; the positive electrode roller is connected with a positive electrode of the power supply; the negative electrode roller is connected with a negative electrode of the power supply; insulating materials are arranged between the positive electrode roller and the bracket and between the negative electrode roller and the bracket; the positive electrode roller is connected with a positive electrode of the measurer; the negative electrode roller is connected with a negative electrode of the measurer. According to the on-line monitoring device disclosed by the invention, the technical problems that an existing carbon fiber test device and an existing carbon fiber test method can only detect products delivered from a production line, cannot realize long-term full detection and is low in timeliness are solved; by virtue of the change of resistance, the product stability is evaluated; on-line monitoring is realized, and nondestructive examination on the product and effective judgment on the stability are guaranteed.

Description

technical field [0001] The invention relates to the field of carbon fibers, in particular to an online monitoring device and method for the stability of carbon fibers. Background technique [0002] As a composite material reinforcement, carbon fiber has been more and more widely used in aerospace, national defense and military and various civil high-tech fields because of its excellent properties. As a basic raw material, the key to the application of carbon fiber in the above fields is the stable and reliable product quality. Carbon fiber is a long-range material, and stability has always been a difficult point in production control. For example, the most widely used PAN-based carbon fiber is currently the most widely used. The production process includes polymerization, spinning , oxidative carbonization and other series of processes, the production process is long, the process route is complicated, and the product quality control, especially the stability monitoring, has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04
Inventor 王浩静顾红星范立东薛林兵赵佑军
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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