Calibration-free remote quantitative laser-induced breakdown spectroscopy analysis method

A laser-induced breakdown and spectral analysis technology, which is applied in the field of photoelectric detection, can solve the problems of wavelength response of spectral detectors and low accuracy of quantitative analysis without considering the geometric relationship between LIBS transmitting and receiving optical systems

Active Publication Date: 2015-12-30
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calibration-free LIBS quantitative analysis method (Calibration-FreeLIBS technique, referred to as CF-LIBS) can be applied to the above occasions, but the traditional CF-LIBS does not consider ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Calibration-free remote quantitative laser-induced breakdown spectroscopy analysis method
  • Calibration-free remote quantitative laser-induced breakdown spectroscopy analysis method
  • Calibration-free remote quantitative laser-induced breakdown spectroscopy analysis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The detection system used in the remote LIBS quantitative analysis method proposed by the present invention mainly includes a telescope assembly 1 , a LIBS spectrometer 2 and a pulse laser assembly 3 . The detector in the LIBS spectrometer 2 adopts a CCD (Chargecoupled device, ie charge coupled device, CCD for short) array detector 6 .

[0040] Let the long-range LIBS detection distance be R, the telescope entrance pupil diameter be D, and the receiving solid angle be Ω, the relationship between the three is The specific embodiment of the present invention realizes according to the following steps:

[0041] (1) Determination of spectral reference function

[0042] The known radiation spectral intensity distribution E s The standard light source 5 of (λ) (in the present embodiment selects the radiation standard lamp) to be placed at the detection distance R (i.e. the focal length of the telescope assembly 1), and now the pulsed laser assembly 3 is in a closed state, a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a calibration-free remote quantitative laser-induced breakdown spectroscopy (LIBS) analysis method. According to the method, a spectrum reference function reflecting the relation between LIBS spectrometer detector digital voltage output and a target laser-induced plasma emission coefficient is tested firstly, then a geometrical relationship model of an LIBS emitting and receiving optical system is established, and then the spectrum reference function and the geometrical relationship model are fit in CF-LIBS quantitative calculation, so that quantitative LIBS detection is achieved. The method has the advantage that due to the fact that the spectrum reference function and the geometrical relationship model of the LIBS emitting and receiving optical system are fit in CF-LIBS quantitative calculation, precision is quite high.

Description

technical field [0001] The invention relates to a laser spectrum detection method, in particular to a remote quantitative laser-induced breakdown spectrum analysis method, which is suitable for quantitative analysis of the composition of remote detection target elements and belongs to the field of photoelectric detection. Background technique [0002] Laser-induced breakdown spectroscopy (LIBS for short) is a laser spectroscopy technique for detecting the constituent elements of matter. LIBS technology can perform qualitative detection of target elements well, but quantitative LIBS detection is a recognized technical problem. There are many factors in quantitative LIBS, including: ablation hole effect, chemical matrix effect, etc., which affect the accuracy of quantitative detection. [0003] Quantitative LIBS analysis commonly used calibration methods, the first type is the calibration method of univariate analysis, this method performs calibration on a certain element to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N21/71
Inventor 万雄况耀武章婷婷刘鹏希
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap