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Laser ultrasonic detection system and method for carbon fiber braided composite material

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

Active Publication Date: 2020-11-27
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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  • Laser ultrasonic detection system and method for carbon fiber braided composite material
  • Laser ultrasonic detection system and method for carbon fiber braided composite material
  • Laser ultrasonic detection system and method for carbon fiber braided composite material

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Embodiment Construction

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0042] For ease of understanding, see figure 1 , a laser ultrasonic inspection system for carbon fiber braided composite materials provided in the embodiment of the present application, including: a pulsed laser 1, a one-dimensional laser vibrating mirror 2, a field mirror 3, a linear array air-coupled laser ultrasonic probe 6 and a data processing module;

[0043...

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Abstract

The invention discloses a laser ultrasonic detection system and method for a carbon fiber braided composite material. A pulse laser beam emitted by a pulse laser generates a laser ultrasonic signal onthe surface of the to-be-detected carbon fiber braided composite material; a linear array type air coupling laser ultrasonic probe receives laser ultrasonic signals generated on the surface of the linear array type air coupling laser ultrasonic probe in a preset phase control focusing mode; the light absorptivity of the surface structure of the to-be-measured carbon fiber braided composite material and the laser ultrasonic signal attenuation amplitude of the internal structure of the to-be-measured carbon fiber braided composite material are calculated; the light absorptivity is compared witha preset light absorptivity threshold value; image representation is performed on the surface structure defects of the to-be-detected carbon fiber braided composite material according to a comparisonresult; and the laser ultrasonic signal attenuation amplitude is compared with a preset laser ultrasonic signal attenuation threshold value, and image representation is performed on the internal structure defects of the to-be-detected carbon fiber braided composite material according to the comparison result so that the objective of micron-scale precision detection of the surface and internal structure defects of the to-be-detected flat plate type material can be realized.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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