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Pollution source emission flux measurement method based on airborne and vehicle-mounted DOAS synchronous observation

A technology of emission flux and measurement method, which is applied in the field of optical telemetry of emission flux of pollution sources, which can solve the problems of lack of data support for calculation and lack of actual calculation of component proportion list, so as to improve detection accuracy, high resolution, and correct decay. Effect

Pending Publication Date: 2020-05-01
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

In the previous method, the influence of factors such as wind field and gas life on the emission flux of atmospheric pollutants was considered, but the calculation of real-time gas decay on emission flux lacked real-time monitoring and effective data support, and some observation methods There is a lack of actual calculation of the proportion of each component of nitrogen oxides in polluting gases

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  • Pollution source emission flux measurement method based on airborne and vehicle-mounted DOAS synchronous observation
  • Pollution source emission flux measurement method based on airborne and vehicle-mounted DOAS synchronous observation

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as figure 1 As shown, a method for synchronously measuring regional air pollution gas emission flux based on airborne and vehicle-mounted passive differential absorption spectroscopy technology includes the following steps:

[0027] Step 1. Carry out simultaneous navigation observation of airborne and vehicle-mounted DOAS systems;

[0028] For the airborne spectrometer acquisition unit, the spectrometer completes the spectrum acquisition work in the zenith direction and the nadir direction through the detection lens, respectively realizes the measurement of the reference spectrum and the measurement spectrum, and then transmits the collected optical signal to the imaging spectrometer by the optical fiber. The dispersive element separates the electromagnetic radiation of the radiation source into a specific wavelength region, and pe...

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Abstract

The invention discloses a pollution source emission flux measurement method based on airborne and vehicle-mounted DOAS synchronous observation. The method comprises the following steps of 1, performing synchronous voyage observation of airborne and vehicle-mounted DOAS systems; 2, obtaining the concentration distribution condition and diffusion trend of NO2 in a region by using spectral inversion;3, analyzing the correlation of airborne and vehicle-mounted observation results, and performing data matching; 4, converting the density of a slant column into the density of a vertical column by using a radiation transmission model, and further obtaining the total emission flux of NO 2; 5, obtaining the concentration of initially discharged NO and the proportion of NO2 through Gaussian fittingaccording to real-time wind field data; 6, deducing the NOx attenuation condition by combining an NOx attenuation model in the atmosphere; and 7, finally obtaining the total emission flux of NOx by synthesizing the results. The pollution source emission flux measurement method is more beneficial to mastering the pollution diffusion trend; and by utilizing the airborne and vehicle-mounted synchronous observation method, the attenuation of NOx in the atmosphere is corrected, and the detection precision is improved.

Description

technical field [0001] The invention relates to the technical field of optical remote measurement of emission flux of pollution sources, in particular to a method for measuring emission flux of pollution sources through synchronous observation of airborne and vehicle-mounted DOAS. Background technique [0002] Differential absorption spectroscopy is an effective means of air pollution monitoring and research, and plays an important role in evaluating and predicting air quality and pollution levels in specific regions. Research institutions at home and abroad have used the DOAS system to measure the emission of pollution sources. Using vehicle-mounted or airborne DOAS to evaluate the emission flux of pollution sources, there are two main sources of error, the most important is the influence of wind field, including the change of wind speed and wind direction, and the second is the chemical transport and lifetime of nitrogen oxides in the air . In the previous method, the in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 曾议司福祺杨东上廖捷鲁晓峰曹子昊奚亮周海金邱晓晗叶帅
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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