LIBS soil detection method, system and equipment for realizing self-adaptive spectral line balance

A soil detection and self-adaptive technology, applied in the field of LIBS detection, can solve problems such as unbalanced spectral lines, low maximum value of spectral intensity, inaccurate measurement results, etc., to achieve the effect of improving accuracy and reducing experimental errors

A soil detection and self-adaptive technology, applied in the field of LIBS detection, can solve problems such as unbalanced spectral lines, low maximum value of spectral intensity, inaccurate measurement results, etc., to achieve the effect of improving accuracy and reducing experimental errors

CN111855643APending Publication Date: 2020-10-30华谱智能科技(天津)有限公司
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  • LIBS soil detection method, system and equipment for realizing self-adaptive spectral line balance
  • LIBS soil detection method, system and equipment for realizing self-adaptive spectral line balance
  • LIBS soil detection method, system and equipment for realizing self-adaptive spectral line balance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Please refer to figure 1 A kind of LIBS soil detection method that realizes self-adaptive spectral line equalization provided for the application, comprises the following steps:

[0064] Pre-excitation: Acquire the laser at maximum energy value E max emission, and in accordance with the first attenuation degree A i (i=1...N) After attenuation, it hits the surface of the sample to be tested to obtain the original spectrum; calculate the maximum intensity value Q of the original spectrum i (i=1...N), and with the maximum standard strength value Q Bmax and / or minimum standard strength value Q Bmin Compare;

[0065] Determine the maximum intensity value Q i (i=1...N) greater than the maximum standard strength value Q Bmax , the first attenuation degree A i (i=1...N) increase according to the first preset ratio; and continue with the adjusted first attenuation degree A i+1 (i=1...N) perform a pre-excitation step;

[0066] Determine the maximum intensity value Q i (...

Embodiment 2

[0114] Please refer to figure 2 A LIBS soil detection system for realizing adaptive spectral line equalization provided by the present application includes a laser emitting device, a pre-excitation device, a control module, and a processing module; the pre-excitation device includes: an adjustable attenuator 3 and a spectrometer 9; The laser emitting device includes: a laser 1;

[0115] The spectrometer 9 has a collecting mirror 8 for taking spectra, and the laser 1 is used for emitting laser light to the surface of the sample 15 to be measured; the adjustable attenuator 3 is used for adjusting the laser intensity of the laser 1;

[0116] The spectrometer 9 is connected to the input end of the processing module, and the processing module is configured to receive the maximum intensity value of the spectrum;

[0117] The input end of the control module is connected to the output end of the processing module, and the output end of the control module is connected to the adjustab...

Embodiment 3

[0172] Please refer to image 3 A LIBS soil detection device for realizing adaptive spectral line equalization provided by the present application includes a test bench body 17, and a through hole 18 runs through the top of the test bench body 17;

[0173] A lifting platform 11 is installed below the through hole 18 in the test bench body 17;

[0174] The top of the test bench body 17 is equipped with a laser emitting device, a spectroscopic device and a pre-excitation device; as Figure 3 to Figure 5 As shown, the laser emitting device includes: a laser 1, a first reflecting device 2, a second reflecting device 4, a beam shaper 5, a focusing mirror 6, and a laser deflecting mirror 7; the spectroscopic device includes an adjustable attenuator 3; The laser 1 is used to emit laser light, so that the laser light passes through the first reflection device 2, the adjustable attenuator 3, the second reflection device 4, the beam shaper 5, the focusing mirror 6, the laser deflection...

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Abstract

The invention provides a LIBS soil detection method, system and equipment for realizing self-adaptive spectral line balance. The method comprises the following steps of exciting laser to be emitted ata maximum energy value, attenuating according to a first attenuation degree and then emitting to the surface of a to-be-detected sample to obtain an original spectrum, calculating the maximum intensity value of the original spectrum, comparing the maximum intensity value with a spectrograph measurement range standard value, and adjusting the first attenuation degree, obtaining a standard spectrumfor the to-be-detected sample, obtaining a laser splitting value, and calculating a laser energy measurement value, acquiring a spark image of the to-be-detected sample, determining the boundary of the spark image, and calculating the spark area and spark intensity, and taking the spark area and the spark intensity as operation parameters, forming a sequence with a standard spectrum and a laser energy measurement value, and entering a neural network algorithm to obtain a final spectrum. By means of the method, spectrum correction is conducted through the spark area, the spark intensity, the standard spectrum and the laser energy measurement value parameters, the obtained final spectrum line is balanced, reliability is high, and the reliability of spectrum analysis is improved.

Description

technical field [0001] The present disclosure generally relates to the technical field of LIBS detection, and specifically relates to a LIBS soil detection method, system and equipment for realizing adaptive spectral line equalization. Background technique [0002] LIBS (Laser Induced Breakdown Spectroscopy) laser-induced breakdown spectrometer uses high peak power pulsed laser to irradiate the sample, and the beam is focused to a small analysis point. In the laser-irradiated spot area, the material in the sample is ablated and stripped away, forming a cloud of nanoparticles above the sample. Since the peak energy of the laser beam is quite high, its absorption and multiphoton ionization effects increase the opacity of the gas and aerosol clouds generated above the sample, even when excited by only a short laser pulse. As the energy of the laser light is significantly absorbed by the cloud, a plasma gradually forms. The high-energy plasma melts the nanoparticles, exciting ...

Claims

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Application Information

Patent Timeline
30 Oct 2020
Publication
CN111855643A
IPC
G01N21/71
CPC
G01N21/718
Inventors
王锐; 马晓红