Device and method for rapid scanning and imaging of two-dimensional distribution of pollutant gases

Abstract

The invention relates to a device and method for rapid scanning and imaging of two-dimensional distribution of pollutant gases. A front optical system receives a sun scattered light passing through the pollutant gases, and the sun scattered light is coupled through an introduction optical system, and then enters an imaging spectrometer, and is received by an area array CCD detector after being dispersed by the imaging spectrometer; the area array CCD detector completes the spectrum acquisition work of a spectral dimension and a spatial dimension, and transmits to a computer through a USB afterdigitization; the computer uses a differential absorption spectroscopy analysis method to performing inversion, so as to obtain detected slant column concentration of the pollutant gases in differentspatial dimensions; and the concentration information is matched with pixels on the spatial dimension according to a geometric model of an observation angle and sequentially reconstructed according to the scanning direction, so that the two-dimensional concentration field distribution of the pollutant gas is quickly scanned and imaged without an interval. The invention realizes the rapid imagingof the two-dimensional distribution information of conventional pollutant gases in the area without the interval, which is beneficial for determining the position information and conveying situation of each scattered source in the area, and provides technical support for the environmental protection department to grasp the position situation of each scattered source in the area.

Description

technical field [0001] The invention relates to the technical field of optical measurement, in particular to a device and method for rapid scanning and imaging of two-dimensional distribution of polluted gas. Background technique [0002] In recent years, China's economy has developed rapidly and will continue to develop rapidly in the future. The resulting air pollution has an increasingly serious impact on people's daily life. At the same time, various air pollution gas monitoring technologies have also made great progress. Compared with the fixed-point sampling chemical analysis method, the advantage of the optical telemetry method is that it has the characteristics of long-distance, multi-component, high-resolution and continuous real-time observation. [0003] Imaging telemetry technology based on differential absorption spectroscopy is a passive measurement technology that uses scattered light from the sun. It is mainly used to obtain the two-dimensional distribution o...

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Problems solved by technology

[0003] Imaging telemetry technology based on differential absorption spectroscopy is a passive measurement technology that uses scattered light from the sun. It is mainly used to obtain the two-dimensional distribution of the concentration of polluted gas oblique columns, and can quickly and accurately locate the scattered sources of pollution in a large area. ; However, it is impossible to quickly image the two-dimensional distribution information of conventional pollutant gases in the region without intervals, and at the same time, the two-dimensional distribution of pollutant gases cannot be visualized directly

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