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Spectroscopic data processing method based on xenon lamp source

A technology of spectral data and processing method, which is applied in the field of spectral data processing based on xenon lamp source, can solve the problems of large fluctuation of measurement results, poor repeatability of light source, large fluctuation of spectral data, etc., so as to avoid poor repeatability and measurement The effect of stable value and elimination of influence

Active Publication Date: 2016-02-24
CHONGQING CHUANYI AUTOMATION
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Problems solved by technology

However, in the actual application process, due to the characteristics of the xenon light source itself, the pulsed xenon light source is a flickering light source. The intensity of each flickering light source of the xenon light source is different, and the repeatability of the light source is poor. Under the same measurement environment, the light source The repeatability is also poor, and its spectral data has a large jump, which has a great influence on the jump of the measurement results

Method used

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  • Spectroscopic data processing method based on xenon lamp source
  • Spectroscopic data processing method based on xenon lamp source

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Embodiment Construction

[0019] figure 1 It is a process flowchart in the present invention, figure 2 Be respectively to 100 groups of standard 100ppm SO in the present invention The optical thickness test result figure of gas, wherein (a) figure is the data without the process of the present invention's method, (b) is the data after the process of the present invention's method, (a ) and (b), the ordinate represents the SO of standard 100ppm The optical thickness of the gas, and the abscissa represents the sequence of points in the 290-310nm wave band used; The data processing method comprises the steps of:

[0020] Including the following steps:

[0021] a. Store a set of raw lamp spectra I lamp , select at least one peak point in a non-absorbing ultraviolet band, denoted as Lamp_Peak;

[0022] b. Take the absorption spectrum I absorb , in the absorption spectrum I absorb Take out the peak point absorb_Peak corresponding to the frequency of Lamp_Peak in step a;

[0023] c. Use the following ...

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Abstract

The invention discloses a spectroscopic data processing method based on a xenon lamp source. The spectroscopic data processing method disclosed by the invention has the beneficial effects that a proportional coefficient K is solved by selecting a wave peak point Lamp_Peak of an original lamp spectrum in a non-absorbing ultraviolet band and by a wave peak point absorb_Peak which is simultaneously selected in an corresponding frequency of an absorption spectrum; an original lamp spectrum can be processed by utilizing the solved proportional coefficient K so as to obtain a new lamp spectrum; the defects of poor light source repeatability and large spectroscopic data bouncing can be avoided, the accuracy of the lamp spectrum is increased, the influence on a measuring result of a light source can be eliminated, processed data of the light source can be subjected to algorithm operation again, the bouncing of a concentration measuring result is reduced, and the stability of concentration measuring values of SO2 and NO is ensured.

Description

technical field [0001] The invention relates to the field of smoke concentration measurement, in particular to a spectral data processing method based on a xenon lamp source. Background technique [0002] In the gas analyzer based on differential optical absorption spectrum (DOAS, Differential Optical Absorption Spectroscopy), the light source is an important part of it. In the gas analyzer of the differential algorithm, it is mainly used to measure the gas concentration of SO2 and nitrogen oxides. In the DOAS algorithm, when calculating the gas concentration, the spectral intensity I of the xenon lamp light source needs to be used lamp (Concentration when there is no absorbing gas) and absorption spectrum intensity I absorb (spectral intensity when there is absorption gas) to do correlation calculations; and in the prior art, in the current mainstream algorithm, because the lamp spectrum cannot be measured in real time, so for the original spectral intensity I of the light...

Claims

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Application Information

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IPC IPC(8): G01N15/06G01N21/33
CPCG01N15/06G01N21/33G01N15/075
Inventor 王菁甄长飞
Owner CHONGQING CHUANYI AUTOMATION
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