Laser Gas-Analyser for Monitoring a Source of Gas Pollution

Abstract

Currently, the problem of growing air pollution of the Earth is of relevance. Many countries have taken measures to protect the environment in order to limit the negative anthropogenic impacts. In such a situation an objective information on the actual content of pollutants in the atmosphere is of importance. For operational inspection of the pollutant concentrations and for monitoring pollution sources, it is necessary to create high-speed high-sensitivity gas analysers. Laser meters are the most effective to provide operational remote and local inspection of gas pollution of the Earth atmosphere. Laser meter for routine gas analysis should conduct operational analysis of the gas mixture (air). For this a development of appropriate information support is required. Such information support should include a database with absorption coefficients of pollutants (specific to potential sources of pollution) at possible measuring wavelengths (holding data for a particular emitter of the laser meter) and an efficient algorithms to search the measuring wavelengths and conduct a quantitative analysis of gas mixtures. Currently, the issues, important for practice and related to the development of information support for the laser gas analyzer to conduct important for practice routine measurements remain unclear. In this paper we develop an algorithm to provide an operational search of the measuring wavelengths of laser gas analyser and an algorithm to recover quantitively the gaseous component concentrations of controlled gas mixture from the laser multi-spectral measurements that take into account a priori information about the source-controlled gas pollution and do not require a large amount of computation. The method of mathematical simulation shows the effectiveness of the algorithms described both for seach of measuring wavelengths and for quantitative analysis of gas releases.