Loose particle deposit particle size detection method and system, and a storage medium
A technology of particle accumulation and detection method, which is applied in the field of atomic emission spectrometry to achieve the effect of convenient operation, convenient and fast in-situ and real-time detection
Active Publication Date: 2021-01-22
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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These works have shown that some restrictions on the placement of samples before component analysis can improve the accuracy of LIBS technology in the analysis of loose particle accumulations with soft matter characteristics to a certain extent, but these literatures have never studied the laser-induced shock. Discussion on the application of transspectroscopy technology to the detection of particle size in loose accumulations
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[0059] This embodiment is only exemplary, not intended to limit the scope of the present invention and its application. The detection method of the present invention is described by taking the accumulation of simple copper sphere microparticles as an example. The detection method of the present embodiment comprises the following steps:
[0060] 1) Nine kinds of copper ball particles with narrow particle size distribution and particle size center size (d) of 218±15, 190±15, 165±10, 132±10, 109±5, 95±5, 77±5, 69±5, and 49±5μm were used form a set of samples. Each sample particle is naturally accumulated in a cuboid box of 70mm*70mm*10mm, and the surface of the accumulation is gently scraped without any pressure;
[0061] 2) Place the prepared 9 sample sets on the two-dimensional moving platform of the LIBS device in turn, set the moving speed of the platform to 0.8cm / s, set the laser pulse energy to 120mJ, set the laser repetition frequency to 1Hz, and the focal plane is on th...
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The invention relates to a loose particle deposit particle size detection method and system, and a storage medium. The method comprises the steps: preparing N loose particle deposit samples with different particle sizes, and forming a group of particle deposit sample set; sequentially placing samples in the particle deposit sample set on a sample platform of an LIBS system, and carrying out laserplasma emission spectral line measurement to obtain a characteristic spectrogram corresponding to each sample; selecting two characteristic spectral lines from the characteristic spectrogram of each sample, and calculating the ratio of the integral areas of the two characteristic spectral lines corresponding to each sample; taking the measured ratio as a probe for representing the particle size inthe loose particle deposit, and constructing a calibration relationship between spectral data and the particle size by adopting a spectral intensity ratio of the two selected spectral lines of each sample corresponding to the sample set; obtaining characteristic spectral data of the loose particle deposits to be detected; and according to the characteristic emission spectrum data corresponding tothe loose particle deposits to be detected, obtaining the particle size in the particle deposits to be detected by utilizing the calibration relationship between the spectrum data and the particle size.
Description
technical field [0001] The invention relates to the technical field of atomic emission spectrometry, in particular to a method, system and storage medium for detecting the particle size of loose particle accumulations based on laser-induced breakdown spectroscopy. Background technique [0002] In actual production, environmental exploration and scientific research activities, it is often necessary to face the problem of on-line / in-situ detection of particle size in the accumulation of loose micro-particles (particles ranging from tens to hundreds of microns). There are many traditional methods for measuring particle size in particle accumulations, such as standard sieves, microscopes, and laser particle size analyzers. Although these methods have the advantages of relatively simple equipment and relatively easy operation, they cannot meet the online / in-situ detection requirements conveniently and quickly. [0003] Due to its own technical advantages, Laser Induced Breakdown...
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IPC IPC(8): G01N15/02G01N21/73
CPCG01N15/0205G01N21/73
Inventor 钱东斌李亚举李小龙马新文
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI