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Metal microcrack three-dimensional characterization system and method based on reflection type laser thermal imaging

A micro-crack and thermal imaging technology, which is applied in image detector methods, image signal processing, radiation pyrometry, image enhancement, etc., can solve the problem of incomplete characterization results and achieve comprehensive characterization results

Active Publication Date: 2021-05-25
ZHONGBEI UNIV
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Problems solved by technology

[0003] In order to solve the problem of incomplete characterization results of traditional metal surface microcrack characterization techniques, the present invention provides a three-dimensional characterization system and method for metal microcracks based on reflective laser thermal imaging

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  • Metal microcrack three-dimensional characterization system and method based on reflection type laser thermal imaging
  • Metal microcrack three-dimensional characterization system and method based on reflection type laser thermal imaging
  • Metal microcrack three-dimensional characterization system and method based on reflection type laser thermal imaging

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Embodiment Construction

[0038] A three-dimensional characterization system for metal microcracks based on reflective laser thermal imaging, including a metal workpiece under test 1, a Fourier lens 2, a semiconductor laser 3, a computer 4, a signal generator 5, and an infrared thermal imager 6; among them, the semiconductor laser 3 The outgoing end of the Fourier lens is facing the incident end of the Fourier lens 2; the outgoing end of the Fourier lens 2 is facing the front of the measured metal workpiece 1; the signal output end of the computer 4 and the signal output end of the signal generator 5 are all connected to the semiconductor laser 3 The signal input terminal is connected; the detection terminal of the infrared thermal imager 6 is inclined to the front of the metal workpiece 1 to be tested.

[0039] A three-dimensional characterization method for metal microcracks based on reflective laser thermal imaging (this method is realized based on the three-dimensional characterization system for me...

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Abstract

The invention relates to a metal surface microcrack characterization technology, in particular to a metal microcrack three-dimensional characterization system and method based on reflective laser thermal imaging. With the metal microcrack three-dimensional characterization system and method based on reflective laser thermal imaging adopted, the problem that the characterization result of a traditional metal surface microcrack characterization technology is not comprehensive is solved. The metal microcrack three-dimensional characterization system based on reflection type laser thermal imaging comprises a metal workpiece to be detected, a Fourier lens, a semiconductor laser, a computer, a signal generator and a thermal infrared imager; the emergent end of the semiconductor laser directly faces the incident end of the Fourier lens; the emergent end of the Fourier lens directly faces the front surface of the metal workpiece to be detected; the signal output end of the computer and the signal output end of the signal generator are connected with the signal input end of the semiconductor laser; and the detection end of the thermal infrared imager is obliquely opposite to the front surface of the metal workpiece to be detected. The system is suitable for metal surface microcrack characterization.

Description

technical field [0001] The invention relates to metal surface microcrack characterization technology, in particular to a three-dimensional characterization system and method for metal microcracks based on reflective laser thermal imaging. Background technique [0002] Metals are widely used in the manufacture of aero-engines, automobiles, and ships because of their advantages such as high strength, good heat resistance, and strong corrosion resistance. During the use of metal workpieces, surface micro-cracks are prone to appear due to fatigue aging or harsh environments, which will affect the mechanical properties, vibration and noise, and service life of metal workpieces. Therefore, in order to ensure the mechanical properties, vibration and noise, and service life of metal workpieces, it is necessary to characterize the surface microcracks of metal workpieces. However, due to the limitation of its own principle, the traditional metal surface microcrack characterization te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/39G01N21/55G01N21/17G01J5/00G06T7/00G06T7/11G06T7/13G06T7/136G06T7/62G06T5/00
CPCG01N21/39G01N21/55G01N21/171G01J5/00G06T7/0004G06T7/11G06T7/13G06T7/136G06T7/62G01N2021/1765G01J2005/0077G06T2207/10048G06T2207/30136G01J5/48G06T5/70
Inventor 张志杰刘佳琪尹武良赵晨阳
Owner ZHONGBEI UNIV
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