Lossless implementation method for laser-induced breakdown spectroscopy component detection and application thereof

A technology of laser-induced breakdown and composition detection, which is applied in thermal excitation analysis, material excitation analysis, and material analysis through optical means, and can solve problems such as ablation damage, weakening of spectral signal propagation, and reduction of test accuracy and reliability. , to achieve the effect of reducing ablation, avoiding excessive loss, and reducing loss

Active Publication Date: 2021-12-03
SHANDONG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007]In order to solve the ablation damage caused by the laser-induced breakdown spectrum detection in the existing atmospheric environment, the laser-induced breakdown spectrum detection in the underwater environment Due to the ionization loss of laser beam energy caused by liquid water and the large weakening of spectral signal propagation by liquid water, the test accuracy and reliability are reduced. This invention proposes a non-destructive realization method and application of laser-induced breakdown spectral component detection. , through a new method of constrained improvement of the laser-induced breakdown spectroscopy test process in the atmospheric environment, the laser pulse forms a spectral signal on the surface of the material, while introducing strengthening effects such as residual compressive stress distribution and microstructure evolution.

Method used

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  • Lossless implementation method for laser-induced breakdown spectroscopy component detection and application thereof
  • Lossless implementation method for laser-induced breakdown spectroscopy component detection and application thereof
  • Lossless implementation method for laser-induced breakdown spectroscopy component detection and application thereof

Examples

Experimental program
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experiment example 1

[0062] Such as figure 1 As shown, it is a schematic diagram of a laser-induced breakdown spectroscopy detection device in an atmospheric environment disclosed in this experimental example. In this method, 1 is a laser, 2 is a reflector, 3 is a focusing mirror, 4 is a spectrometer, and 5 is an optical fiber. , 6 is the receiving head, 7 is the material to be tested, and 8 is the focusing position of the laser beam. After the laser beam generated by the laser 1 is reflected by the mirror 2 and focused by the focusing mirror 3, it directly irradiates the surface of the material to be tested to form ablation And during the excitation effect of the material, the other end of the laser 1 is connected to a spectrometer 4, and the spectrometer 4 collects spectral signals through the optical fiber 5 and the receiving head 6, and then analyzes information such as element types and composition content on the surface of the material. In the process, the laser beam focusing position 8 is o...

experiment example 2

[0066] Such as figure 2 As shown, it is a schematic diagram of a laser-induced breakdown spectroscopy detection device in an atmospheric environment disclosed in this experimental example. The difference from Experimental Example 1 is that the material 7 to be detected is completely located in the underwater environment 9, and the rest of the settings are the same as in Experimental Example 1. .

[0067] In this method, the laser beam passes through the underwater environment 9 to irradiate the surface of the material 7 to be detected, and in the process of forming ablation and material excitation effects, the spectrometer 4 collects spectral signals through the receiving head 6, and then analyzes the element types on the surface of the material and content of ingredients. In this process, the laser beam focus position 8 is on the material surface, that is, the laser beam is in a state of no defocus relative to the material surface; in addition, the propagation of the laser ...

Embodiment 1

[0069] Such as image 3 As shown, it is a schematic diagram of a laser-induced breakdown spectrum detection device in an atmospheric environment disclosed in this embodiment. The laser beam generated by the laser 1 is reflected by the reflector 2 and focused by the focusing mirror 3, and then passes through the water confinement layer 10 to radiate During the process of irradiating the surface of the material to be tested by irradiating the surface of the material to be tested to form ablation and material excitation effects, the other end of the laser 1 is connected to a spectrometer 4, and the spectrometer 4 collects spectral signals through the optical fiber 5 and the receiving head 6, and then analyzes the material. Information such as the type and content of elements on the surface. In the process, the laser beam focusing position 8 is above the water confinement layer 10 on the material surface, that is, the laser beam is in a positive defocus state relative to the mater...

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Abstract

The invention relates to the technical field of material microscopic information monitoring and detection, in particular to a lossless implementation method for laser-induced breakdown spectroscopy component detection and application thereof. In order to solve the problems that laser-induced breakdown spectroscopy detection in an existing atmospheric environment causes ablation damage to the surface of a material, and laser-induced breakdown spectroscopy detection in an underwater environment reduces test precision and reliability due to ionization loss of liquid water to laser beam energy and great weakening of the liquid water to spectral signal propagation. According to the lossless implementation method for laser-induced breakdown spectroscopy component detection and the application thereof, a laser-induced breakdown spectroscopy test process in an atmospheric environment is subjected to constraint type improvement, and a laser-induced breakdown spectroscopy destructive result is effectively compensated by adopting a pulse laser shock peening effect, so that lossess laser-induced breakdown spectroscopy component detection is realized.

Description

technical field [0001] The invention relates to the technical field of material microscopic information monitoring and detection, in particular to a non-destructive realization method and application of laser-induced breakdown spectrum component detection. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Laser-induced breakdown spectroscopy (LIBS) technology focuses ultrashort pulse laser on the surface of the sample to form plasma, and then analyzes the plasma emission spectrum to determine the material composition and content of the sample. After the ultrashort pulse laser is focused, the energy density is high, and it can excite samples in any state of matter (solid, li...

Claims

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Application Information

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IPC IPC(8): G01N21/71
CPCG01N21/718
Inventor 卢国鑫田野鲁艳红
Owner SHANDONG UNIV
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