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

A harmful gas and monitoring device technology, which is applied in measuring devices, analytical materials, color/spectral characteristic measurement, etc., can solve the problems of low measurement accuracy of electrochemical methods, dependence on imports of key components, complex structure, etc., so as to save quantity and avoid Discrete, high-response effects

Inactive Publication Date: 2011-09-07
赵瑜
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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

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

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Embodiment Construction

[0041] The main components of the intelligent infrared multi-component harmful gas monitoring method and device include: stepping motor 1, infrared light source 2, focusing lens 3, gas correlation filter wheel 4, multiple reflection gas absorption pool 5, sampling air pump 6, infrared detector 7. Signal processing board 8. Operation and display unit 9. The system configuration is as attached Figure 5 shown.

[0042] The infrared light emitted by the infrared light source 2 is focused by the focusing lens 3, filtered and modulated by the gas-related filter wheel 4, then sent to the multiple reflection gas absorption pool 5, and then sent to the infrared detector 7 after multiple reflections. The optical signal is converted into a weak electrical signal, and the electrical signal is sent to the signal processing board 8 after being amplified, and then sent to the display unit 9 after analog and digital processing, and communicates with the PC at the same time.

[0043] A shadi...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/35G01N21/03G01N21/3504
Inventor 赵瑜赵建华
Owner 赵瑜
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