Gas detection and identification sorting system based on terahertz waves

A technology for identification, classification and gas detection, which is used in measurement devices, analysis materials, and material analysis by optical means. , Wide application range, high resolution effect

Inactive Publication Date: 2015-06-24
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The present invention aims at the problem that the resolution of the gas absorption spectrum is not high enough for the current spectrum detection technology, and the mixed gas or unknown gas cannot be classified, and proposes

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  • Gas detection and identification sorting system based on terahertz waves
  • Gas detection and identification sorting system based on terahertz waves

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Embodiment Construction

[0019] Such as figure 1 Shown is a schematic structural diagram of an embodiment of a gas detection, identification and classification system based on terahertz waves, including a laser light source 1, a monochromatic beam splitter 2, a mirror A3, a slow delay line module 4, a fast delay line module 5, an attenuation plate A6, an attenuation Sheet B7, mirror B8, convex lens A9, terahertz transmitting system 10, parabolic mirror A11, pressure sensor 12, parabolic mirror B13, terahertz receiving system 14, convex lens B15, reflecting mirror C16, parabolic mirror C17, gas tube 18, gas Cavity 19, pumping port 20, parabolic mirror D21, the ultrashort pulse laser output from the laser source 1 passes through the monochromatic beam splitter 2, and part of the reflected pump light passes through the slow delay line module 4, the fast delay line module 5, and the attenuation Sheet B7, mirror B8, and convex lens A9 reach the terahertz emission system 10, and the generated terahertz wave...

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Abstract

The invention relates to a gas detection and identification sorting system based on terahertz waves. By virtue of a terahertz wave gas detection device, the terahertz waves and gas molecules have a resonance effect in a sealed cavity; electrons at the peripheries of gas atoms are stimulated to jump, so that the molecules rotate and vibrate to obtain a characteristic absorption peak; an absorption spectral line of the gas atoms/molecules is detected; a heuristic algorithm is used for accurately identifying a detected gas spectral line; the system adopts the sealed cavity, a vacuum pump, a pressure monitoring device and the heuristic algorithm, so that the terahertz waves and the gas in the cavity are interacted under different pressure conditions and the function of predicating unknown gas by further sorting is realized; and the gas detection and identification sorting system has the advantages of simple device, easiness in operation and wide application range.

Description

technical field [0001] The invention relates to a gas detection and identification technology, in particular to a gas detection, identification and classification system based on terahertz waves. Background technique [0002] Gas molecules have a large number of characteristic absorption peaks in the infrared band. This feature has become a hot spot in the international academic circle for many years. The rotational energy level of gas is more obvious in the terahertz band, especially for polar molecules such as gaseous water and carbon monoxide. , Methanol, its absorption peak showed specificity and repeatability. Utilizing these properties of gases in the terahertz spectrum enables rapid detection of many gases. [0003] Terahertz waves refer to electromagnetic waves (1 THz=10 12 Hz), which lies between microwaves and infrared radiation on the electromagnetic spectrum. The special electromagnetic spectrum position of terahertz wave makes it have many unique advantages,...

Claims

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Application Information

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IPC IPC(8): G01N21/3586
Inventor 霄炜朱亦鸣彭滟陈向前周云燕罗坤
Owner UNIV OF SHANGHAI FOR SCI & TECH
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