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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

Active Publication Date: 2022-03-29
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it requires additional preparation of samples, equipped with a molding device, and the prepared samples need to be transmitted to a special detection platform, which makes the overall structure of the detection system complex, bulky, cumbersome, and time-consuming, which is not conducive to the online real-time analysis of powder samples. detection

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In this embodiment, the power control unit 2 includes an air compressor 201 and two control branches connected to the air compressor 201 . Specifically, seefigure 1 , one of the control branches includes a first solenoid valve 203 and a first speed regulating valve 205, the input end of the first solenoid valve 203 is connected to the first air flow branch of the air compressor 201, and the output end of the first solenoid valve 203 is connected to the first The input end of a speed regulating valve 205 . Another control branch includes a second solenoid valve 204 and a second speed regulating valve 206, the input end of the second solenoid valve 204 is connected to the second air flow branch of the air compressor 201, and the output end of the second solenoid valve 204 is connected to the second The input end of the speed control valve 206.

[0032] The air compressor 201 is the driving source of the powder sample processing module, which can provide a maximum pressur...

Embodiment 2

[0050] In this embodiment, the power control unit 2 includes an air compressor 201, a hydraulic pump 202, and two control branches connected to the hydraulic pump 202. The structure of the control branch is the same as that of the control branch in Embodiment 1. Let me repeat. The two pushing sub-units both include a hydraulic cylinder, an inner rod of the hydraulic cylinder and a push rod. One end of the push rod is connected to the inner rod of the hydraulic cylinder, and the other end of the push rod is inserted into the constrained metal long pipe 1. The hydraulic cylinder and the control branch are one by one Corresponding connectivity, such as figure 2 shown. The two hydraulic branches generated by the hydraulic pump 202 are respectively adjusted in speed and direction by the two control branches, and then enter the hydraulic cylinders connected to each control branch to push the inner rod and push rod of the hydraulic cylinder relative to the restrained metal long pip...

Embodiment 3

[0053] In this embodiment, the power control unit 2 includes an air compressor 201, two guide rails located at both ends of the constraining long metal tube 1, and servo motors arranged on each guide rail, and the servo motors can move on the guide rails. Both of the above two pushing subunits include push rods, and the servo motors are connected to the push rods in one-to-one correspondence, such as image 3 As shown, to drive the push rod to move relative to the constrained metal long pipe 1.

[0054] In this embodiment, the driving source in the power control unit 2 is replaced by the first guide rail 207, the second guide rail 208, the first servo motor 209, and the second servo motor 210; putter. The drive source and drive device can provide faster movement speed and higher control precision, and the device as a whole is simpler and easier to automate, and is suitable for scenarios that require high detection speed and the sample itself is easy to form. Other structures...

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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. .

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/71G01N1/28
CPCG01N21/718G01N1/286
Inventor 李祥友占凯平贺超刘可陈吉汤志阳李青洲张闻刘坤朱晨薇曾晓雁
Owner HUAZHONG UNIV OF SCI & TECH
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