Method and apparatus for monitoring intelligent infrared multi-component harmful gas

Abstract

The invention discloses an intelligent infrared multi-component noxious gas monitoring method and the equipment, an infrared light source self with a parabolic reflection mirror sends out infrared light focused by a focusing lens, after vortically filtered and modulated by a gas related filtering round and the focused infrared light enters the entrance port of a multiple reflections gas absorption cell, the testing multi-component gas flows through the multiple reflections gas absorption cell, after reflected many times in the multiple reflections gas absorption cell the incident light outgoes from an exit portal, and is received by an infrared detector, which converts a light signal to an electrical signal, the electrical signal is amplified and sent to a signal processing and a display unit to carry on analysis processing, simultaneously, communicates with a PC machine. Because the invention combines with the gas related filter and the optical filter, the problem of the cross interference of the testing of the multi-component gas can be solved well, a time multi-beams system formed by the gas related filtering round only needs one infrared detector, so that the quantity of the infrared detectors can be saved, and the divergence due to different detectors can be avoided.

Description

Technical field: [0001] The invention belongs to the technical field of environmental monitoring, emergency response and early warning, in particular to an intelligent infrared multi-component harmful gas monitoring method and device. Background technique: [0002] Quantitative analysis of multi-component gases has a wide range of applications in the field of environmental protection. Changes in industry, transportation, and climate are putting increasing pressure on environmental protection. The development of advanced gas monitoring technology in the field of environmental protection is in line with my country's policy orientation of building a conservation-oriented society and energy conservation and emission reduction. Therefore, high-precision detection of harmful gases is of great significance to economic and social development. [0003] At present, gas measurement methods mainly include electrochemical method, non-dispersive infrared method, laser absorption harmonic...

AI Technical Summary

Problems solved by technology

The electrochemical method has low measurement accuracy and poor repeatability, and is only suitable for general applications; the simple non-dispersive infrared method has the disadvantage of cross-sensitivity; although the laser absorption harmonic method and Fourier transform analysis method have good measurement results, the structure is complex and Expensive, and key components must rely on imports

Images