Judgment method for detecting defects of wave absorption coating by using pulse infrared thermal waves

A technology of infrared thermal wave and wave absorbing coating, which is used in optical testing for flaws/defects, etc.

Active Publication Date: 2014-03-12
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Other methods, such as enhancing the image signal-to-noise ratio and image contrast, neural network and pulse phase heat map analysis methods, etc...

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  • Judgment method for detecting defects of wave absorption coating by using pulse infrared thermal waves
  • Judgment method for detecting defects of wave absorption coating by using pulse infrared thermal waves
  • Judgment method for detecting defects of wave absorption coating by using pulse infrared thermal waves

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Embodiment

[0032] For coating structures, simply use figure 1 Indicated, the three main defect forms of the coating structure are depicted from left to right in the figure: surface damage, internal pores and debonding between the coating and the substrate.

[0033] figure 2 It is a schematic diagram of the pulsed infrared thermal wave technology used in the detection of wave-absorbing coatings of the present invention, and it is also a structural schematic diagram of an actual system applying the method of the present invention.

[0034]The process of using the pulse thermal imaging method to detect the wave-absorbing coating will be described below in conjunction with an embodiment. A standard sample of absorbing coating is used in this embodiment, its structure is as follows image 3 As shown, the coating thickness is designed to be 1mm, but the actual thickness is slightly larger than 1mm.

[0035] refer to image 3 , the high-energy flash lamp applies visible light energy to the...

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Abstract

The invention relates to a judgment method for detecting defects of a wave absorption coating by using pulse infrared thermal waves and belongs to the technical field of nondestructive inspection. According to the judgment method, heating equipment for stimulating a test piece to be detected can be a high-energy flash lamp or other pulse type heating equipment; a high-energy flash lamp or other pulse type heating equipment with relatively short pulse acting time is suitable for being adopted; the collection frequency of a thermal imaging device is relatively high and the collection time is set according to the specific property of a material of the test piece to be detected. According to the judgment method, firstly, a standard test piece with a common defect type needs to be selected to be subjected to an experiment; thermal diffusion characteristics are extracted and defect judgment criteria are established to realize the judgment on different defect types; when the structure of the coating is changed, such as a coating material and a coating thickness, reconstructed unstuck defect criteria need to be referred.

Description

technical field [0001] The invention relates to a method for judging defects of a wave-absorbing coating by using pulsed infrared thermal waves, and belongs to the technical field of non-destructive flaw detection. Background technique [0002] Because the wave-absorbing coating has the characteristics of thin thickness, large coating area, harsh use environment, and high performance requirements; defects such as pores and interface debonding may occur during the forming process. To ensure the quality of large-area coatings, it is necessary Conduct non-destructive testing of coatings. At present, the only methods for detecting the quality of absorbing coatings are visual inspection and tapping, etc., and it is urgent to find a fast and reliable detection method. Therefore, the non-destructive testing technology of absorbing coating is a blank. [0003] Pulse thermal imaging technology is one of the commonly used infrared thermal wave nondestructive testing technologies dev...

Claims

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Application Information

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IPC IPC(8): G01N21/88
Inventor 葛丽曾智伍颂朱军辉刘哲军程茶园李晓丽
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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