Method and device for processing gas Raman spectrum

A Raman spectrum and processing method technology, applied in the field of gas Raman spectrum processing methods and processing devices, can solve the problems of Raman spectrum repeatability and poor accuracy, and achieve the elimination of the influence of Raman spectrum, reduce errors, reduce The effect of error disturbance

Active Publication Date: 2019-12-13
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides a gas Raman spectrum processing method, which can solve the problem of poor repeatability and accuracy in obtaining the Raman spectrum of a mixed gas in the prior art

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  • Method and device for processing gas Raman spectrum
  • Method and device for processing gas Raman spectrum
  • Method and device for processing gas Raman spectrum

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] figure 1 It is a schematic structural diagram of a gas Raman spectrometer provided by an embodiment of the present invention, as figure 1 As shown, the gas Raman spectrometer includes: a laser 1 , an optical fiber 2 , a Raman probe 3 and a fiber optic spectrometer 4 . Among them, laser 1 is a laser with a central wavelength of 532nm, which is used to emit monochromatic laser light to irradiate the sample gas in the gas sampling tube 5, and Raman probe 3 is a fiber optic probe with a central wavelength of 532nm, which is used to focus the monochromatic laser emitted by the laser , and receive the Raman scattered light reflected by the sample gas, the fiber optic spectrometer 4 is a TEC (Thermo Electric Cooler, semiconductor refr...

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Abstract

The invention discloses a method for processing a gas Raman spectrum, and the processing method comprises the following steps of acquiring a background spectrum, which is a Raman spectrum measured inthe case of introducing the gas without Raman response in a sample tube; acquiring an initial sample gas Raman spectrum of the gas to be tested; modifying the background spectrum based on the initialsample gas Raman spectrum to obtain the modified background spectrum; removing the modified background spectrum from the initial sample gas Raman spectrum to obtain a first sample gas Raman spectrum;performing baseline correction on the first sample gas Raman spectrum to obtain a second sample gas Raman spectrum; and normalizing the second sample gas Raman spectrum. The method provided by the invention effectively solves the problem of poor repeatability and accuracy existing in the acquired Raman spectrums in the prior art, and can obviously improve the repeatability and accuracy of Raman spectrums.

Description

technical field [0001] The invention belongs to the field of chemometrics, and in particular relates to a gas Raman spectrum processing method and processing device. Background technique [0002] Raman spectroscopy is a technique that uses inelastic collisions between photons and medium atoms to obtain scattering spectra. It is usually used to study the microstructure of molecules or substances, such as detecting the composition of mixed gases. It can detect all the components of the mixed gas to be tested in a short time, and has the characteristics of fast detection speed and high detection sensitivity. [0003] At present, the Raman spectrum is usually obtained by a Raman spectrometer, but the Raman spectrum (the Raman spectrum is called the background spectrum) will also be generated due to the metal material in the sampling tube containing the mixed gas, so that the detected mixed gas The accuracy of the Raman spectrum of the mixed gas is poor, so it is necessary to el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/65
Inventor 朱华东周理常宏岗
Owner PETROCHINA CO LTD
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