A Laser-Induced Breakdown Spectrum Correction Method Based on Homogeneous Matter
A laser-induced breakdown and uniform technology, applied in thermal excitation analysis, material excitation analysis, material analysis through optical means, etc., can solve the problems of high labor cost, low dust removal efficiency, easy damage to the atomized mirror, etc., to achieve extended Maintenance cycle, the effect of reducing the number of times of use
Active Publication Date: 2019-02-26
山西祎恒光电科技有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problems of high labor cost, low dust removal efficiency and easy damage in the optical dust prevention method of laser induced breakdown spectrum correction using manual cleaning method, electrostatic dust removal method, positive pressure protection method, water spray or atomization wiping method, etc. or poor technical problems such as atomized mirror surface and poor dust removal effect, a laser-induced breakdown spectrum correction method based on homogeneous substances is provided
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[0018] In this embodiment, cement is used as the sample to be tested, and a laser-induced breakdown spectrum correction method based on a homogeneous substance of the present invention is specifically introduced, including the following steps:
[0019] (a) Select a homogeneous material with hard texture, surface ablation resistance, uniform distribution, and internal and external consistency; because 6061 aluminum alloy is hard, ablation resistant, uniform distribution, internal and external consistency, and the RSD between groups is small, it is selected as the uniform material Meet the relevant selection requirements. figure 1 The calculation value of RSD between 45 spectral lines in the plasma spectrum of the aluminum alloy 1800 group is shown, and the variation range is 0.4-1.8%;
[0020] (b) After weighing five clean lenses of the same kind, use a blower to blow up the dust and scatter it evenly on the surface of these lenses to make them accept different degrees of pollu...
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The invention belongs to the technical fields of spectral analysis and detection method, and specifically relates to a uniform substance based laser induced breakdown spectroscopy correction method. Because the environment of an industrial site is bad and there are many dusts, the optical elements (especially the optical transceiving windows contacted with the external environment) of an optical detection system used in a laser induced breakdown spectroscopy technology (LIBS) are easily polluted by the dusts; the excitation light power and fluorescence collection efficiency are reduced, and thus the error of the detection results is large. According to the method, the plasma spectroscopy of a uniform substance is used to correct the element characteristic emission lines in the plasma spectroscopy of a sample so as to inverse the strength of element characteristic emission lines under a pollution-free situation, and thus the influence of dusts on the measurement precision of LIBS can be effectively corrected. By combining the provided correction method and a conventional optical dustproof method, the maintenance period of LIBS detection equipment is largely prolonged.
Description
technical field [0001] The invention belongs to the technical field of spectral analysis and detection methods, and in particular relates to a laser-induced breakdown spectrum correction method based on a uniform substance. Background technique [0002] Laser-induced breakdown spectroscopy is a brand-new method for material element analysis, which has the advantages of fast analysis speed, simple installation, no need for sample pretreatment and simultaneous analysis of multiple elements, and is very suitable for industrial on-line detection. However, due to the harsh environment and a lot of dust in the industrial site, the optical components inside the laser-induced breakdown spectroscopy (LIBS) optical detection system, especially the optical transceiver window that is in contact with the external environment, are easily polluted by dust, which reduces the excitation. Optical power and fluorescence collection efficiency change the collected spectrum, which eventually lead...
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IPC IPC(8): G01N21/71
CPCG01N21/718
Inventor 赵洋张雷尹王保肖连团贾锁堂
Owner 山西祎恒光电科技有限公司