Abstract
With the development of industrialization, the surrounding areas of the city gradually become the important chemical industry bases, which have made important contributions to the economic development of the city. However, there are also some safety risks in the process of production, storage and transportation for chemical products. Once hazardous gas leaks, it will not only cause pollution of the environment, but also harm the health of people and animals. In order to deal with leakage incidents in time, many chemical enterprises have already built their own real-time monitoring system. However, most of these platforms are only for real-time monitoring within the enterprise, and can not meet the needs of the city's overall monitoring for hazardous gases. Fourier Transform Infrared (FTIR) is a comprehensive monitoring technology developed rapidly in recent years, which is widely used in the emergency monitoring of pollution source gas. In this paper, a large area dangerous chemical gas monitoring platform is proposed by using the technology of Solar Occultation Flux (SOF-FTIR). First of all, this paper briefly introduces the gas monitoring technology. What is more, the principal component analysis (PCA) in FITR technology is described in detail. Secondly, in view of the large amount of noise in the infrared spectrum data, an improved threshold denoising method is proposed by introducing the correction coefficient. Compared with traditional FTIR, SOF-FTIR can monitor hazardous chemical gas in a wider area, and has better mobility. Finally, the simulation results show that the improved denoising algorithm has better performance. Theoretically, the real-time monitoring platform for urban hazardous gas based on SOF-FTIR can effectively monitor the leakage of hazardous gas in cities.
