An online powder detection device based on laser-induced breakdown spectroscopy

A technology of laser-induced breakdown and detection device, applied in the field of atomic emission spectrometry detection, can solve the problems of online real-time detection of unfavorable powder samples, the overall structure of the detection system is complex, and the volume is large, so as to improve detection accuracy, wide application range, The effect of the simple structure of the device
CN112595705BActive Publication Date: 2022-03-29HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2022-03-29

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Abstract

The invention discloses an online powder detection device based on laser-induced breakdown spectroscopy, belonging to the field of atomic emission spectroscopy detection, comprising: a long metal tube constrained, with a sample inlet and a detection port on the side, and the powder sample enters the tube through the sample inlet Middle; pushing unit, including two pushing sub-units located at both ends of the constrained metal long tube and partially inserted into it; power control unit, providing power for the pushing unit, pushing the pushing sub-unit to move relative to the constrained metal long tube , to extrude the powder sample into a sample column, and push the sample column to the detection port; the spectral detection module uses laser ablation of the sample column to generate an optical signal, and generates the detection result of the sample column according to the spectral information corresponding to the optical signal . The structure of the device is simple, which realizes the rapid preparation and inspection of powder samples. The detection form of the sample column enhances the intensity and stability of the spectral signal, improves the detection accuracy, and satisfies the needs of fast and accurate online detection of powder components in actual production. .
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Description

technical field

[0001] The invention belongs to the field of atomic emission spectrometry detection, and more specifically relates to an online powder detection device based on laser-induced breakdown spectroscopy. Background technique

[0002] Laser-induced breakdown spectroscopy (LIBS) is a kind of atomic emission spectroscopy, which uses laser pulses emitted by lasers to ablate matter and generate short-lived plasmas. The elemental characteristic spectrum is used to achieve the purpose of detecting the composition information of the sample. Powder samples are characterized by their fluffy shape, weak interaction with each other, uneven density distribution, and no flat surface. When the laser pulse directly acts on the powder sample, the phenomenon of sample sputtering, low laser energy absorption efficiency and sharp fluctuation of spectral signal will appear, which will affect the stability and accuracy of LIBS spectrum. Therefore, rapid preparation and meeting the re...

Claims

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