Multi-axial passive differential absorption spectrometry measurement system capable of recording sky conditions simultaneously

Abstract

The invention belongs to the technical field of optical measurement, in particular to a multi-axial passive differential absorption spectrometry measurement system capable of recording sky conditionssimultaneously. The multi-axial passive differential absorption spectrometry measurement system capable of recording the sky conditions simultaneously comprises a rotating platform, a telescope, a camera, a central shaft, a spectrograph and a computer, wherein the telescope and the camera are respectively and vertically connected with the central shaft; the centre lines of the telescope and the camera are parallel to each other; the telescope is used for converging scattered light signals of the sun and transmitting the signals into the spectrograph; a corresponding spectrogram is obtained after the signals are subjected to light splitting through the spectrograph; the spectrogram is input into the computer; the camera is used for shooting sky cloud layer pictures and inputting the sky cloud layer pictures into the computer; the computer controls the rotating angle of the central shaft by controlling the rotating platform, so that the telescope and the camera are controlled to acquirespectral signals and sky cloud layer conditions at any angle simultaneously; the computer analyses spectral information to obtain the column concentration of trace pollutants in a troposphere; the vertical distribution information of the pollutants when the cloud layer interference is low is acquired by combining the shot sky cloud layer pictures.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, in particular to a multi-axis passive differential absorption spectrum measurement system capable of simultaneously recording sky conditions. Background technique [0002] Atmospheric environmental issues have been attracting attention in recent decades, and people are paying more and more attention to the study of the temporal and spatial distribution of atmospheric trace gases, which are harmful to human health (such as NO 2 , SO 2 , HCHO), atmospheric oxidation capacity (such as O 3 , OH, HONO) and the formation of secondary organic aerosols (such as CHOCHO) have a significant impact, and its concentration in the atmosphere has become the data that many scientific research institutions urgently need. The current measurement technology is mainly based on traditional chemical point measurement, mass spectrometry and spectroscopy. Compared with chemical point measurement, the latter...

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Problems solved by technology

[0004] Since the passive differential absorption spectroscopy system receives the scattered light from the sun to obtain the absorption spectrum signals of trace gases, when the telescope faces the sky with clouds, the measurement results will have a large error. The traditional conventional passive differential absorption spectroscopy system This situation cannot be recorded in real time, and there is no basis for the screening of follow-up observation results

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