A laser ultrasonic testing system and method for carbon fiber braided composite materials

A carbon fiber weaving, laser ultrasonic technology, applied in the analysis of materials, material analysis by optical means, analysis of solids using sonic/ultrasonic/infrasonic waves, etc., can solve the problems of large volume, low accuracy, high cost, and improve the scanning rate. , the effect of reducing production cost and low cost

Active Publication Date: 2022-06-24
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0005] This application provides a laser ultrasonic testing system and method for carbon fiber braided composite materials, which are used to solve the problem of insufficient comprehensive detection of structural defects of carbon fiber braided composite materials in the production stage in the prior art, low detection efficiency, large volume, high cost and Technical issues with lower accuracy

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  • A laser ultrasonic testing system and method for carbon fiber braided composite materials
  • A laser ultrasonic testing system and method for carbon fiber braided composite materials
  • A laser ultrasonic testing system and method for carbon fiber braided composite materials

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[0041] In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0042] For ease of understanding, see figure 1 , a carbon fiber braided composite material laser ultrasonic detection system provided by the embodiment of the present application includes: a pulsed laser 1, a one-dimensional laser galvanometer 2, a field mirror 3, a linear array air-coupled laser ultrasonic probe 6 and...

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Abstract

This application discloses a laser ultrasonic testing system and method for carbon fiber braided composite materials. A pulsed laser beam is sent out by a pulsed laser to generate laser ultrasonic signals on the surface of the carbon fiber braided composite material to be tested, and the linear array air-coupled laser ultrasonic probe uses a preset The phase-controlled focusing method receives the laser ultrasonic signal generated on the surface, and calculates the light absorption rate of the surface structure of the carbon fiber woven composite material to be tested and the attenuation amplitude of the laser ultrasonic signal of the internal structure, and compares the light absorption rate with the preset light absorption rate. Threshold comparison, and image characterization of the surface structure defects of the carbon fiber woven composite material to be tested according to the comparison results, and the attenuation amplitude of the laser ultrasonic signal is compared with the preset laser ultrasonic signal attenuation threshold, and according to the comparison results The image characterization of the internal structural defects of the woven composite material realizes the purpose of micron-level precision detection of the surface and internal structural defects of the flat material to be tested.

Description

technical field [0001] The present application relates to the technical field of laser ultrasonic testing, and in particular, to a laser ultrasonic testing system and a corresponding testing method applied to carbon fiber woven composite materials. Background technique [0002] Carbon fiber braided composite materials are widely used in civil industrial manufacturing, aerospace and military industries due to their excellent structural properties. Because carbon fiber braided composite materials have many components, anisotropy of materials, and complicated process, this puts forward new requirements for the quality inspection of carbon fiber braided composite materials in the production stage. [0003] At present, how to solve the interference of the complex micro-surface structure of carbon fiber composite sheet on the detection system and the detection efficiency, and obtain high-resolution surface micro-structure and internal deep defects at the same time has become an ur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/22G01N29/27G01N29/28G01N21/17
CPCG01N29/041G01N29/22G01N29/27G01N29/28G01N21/1702G01N2291/023G01N2021/1706
Inventor 曾吕明王宝定纪轩荣何勇邓丽军
Owner GUANGDONG UNIV OF TECH
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