| Laser-induced breakdown spectroscopy(LIBS)is a new technology of element analysis method.The advantage of laser induced breakdown spectroscopy(LIBS)is fast,one-time testing of a variety of elemental content,small damage to the sample,support for remote testing and support for online testing and so on.The technology has developed rapidly in recent years,replacing the traditional detection methods in multiple detection fields.In the field of coal quality detection,because of the wide variety of coal,the difficultyfor coal detection and high cost of traditional detection method.At present,there is no mature LIBS analytical instrument in the field of coal quality testing.Aiming at the application goal of LIBS in coal quality testing industry,based in LIBS theory,I designed and produced a prototype of LIBS fast coal quality analyzer,and completed the laboratory and field test with this prototype.Specific research work includes:(1)In this paper,according to the complex characteristics of coal composition,using partial least squares model,a mathematical model is established to predict the coal industry index using multiple elements.Analysis of various factors affecting spectral repeatability.(2)A laser phase locking system based on optical lattice experiment is designed and developed.Analyze the effect of laser phase on the contrast of atoms in the optical lattice.(3)Through the analysis and comparison of different optical path structure,selecting appropriate devices the best structure for design and manufacture,and completing the design of the analyzer chassis structure and the relevant modules;(4)Complete the laboratory test and go to Shanxi for field testing.The test results are up to national standards.In this paper,the implementation of LIBS laser coal quality analyzer provides a new method for the rapid online detection of coal quality,and also lays a certain theoretical foundation for the relevant application of LIBS.This paper consist of 50 figures,5 tables and 68 references. |
PDF Full Text Request