Device for remotely detecting hazardous gas on basis of TeraHertz wave

Abstract

The invention relates to a device for remotely detecting hazardous gases on the basis of TeraHertz waves. The device comprises a TeraHertz emission source, a TeraHertz signal receiver, a high-speed time delay module, a sealed gas box, a vacuum pump and a gas valve, wherein TeraHertz waves received by the TeraHertz signal receiver in a vacuum environment is taken as a reference signal; TeraHertz waves received by the TeraHertz signal receiver in an environment that remote hazardous gases are introduced into the sealed gas box from a long-distance vacuum pipeline; the two groups of TeraHertz waves are compared, and then the components and the concentration content ratios of hazardous gases in the sealed gas box can be obtained. The remote hazardous gases can be detected by using the TeraHertz waves; the influence that in a common method, light waves can be absorbed by moisture in the atmosphere when probe laser is remotely transmitted in the atmosphere can be avoided; the hazardous gases can be absorbed into the sealed gas box for detection through the long-distance vacuum pipeline, then possible danger of the hazardous gases in the detection process can be reduced, and the device is high in resolution ratio, simple in structure, easy to operate and wide in application range.

Description

technical field [0001] The invention relates to a gas detection device, in particular to a device for long-distance detection of dangerous gas based on terahertz waves. Background technique [0002] Terahertz waves refer to electromagnetic waves (1THz=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, such as low photon energy, at the millielectron volt level, it will not cause harmful photoionization to biological tissues, and many substances have strong Absorption and dispersion can be used to identify different substances, etc. [0003] Water vapor in the atmosphere has a certain non-cooperative effect on terahertz radiation transmission, that is, there is absorption attenuation. At present, all commercial, industrial and scientific research on terahertz waves pays great attention to avoiding the influence of water vapor. T...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the current short-distance detection of dangerous gas is very dangerous to the human body, but the long-distance detection cannot be detected or the detection accuracy is too low. A device for long-distance detection of dangerous gas based on terahertz waves is proposed. Emission source and signal receiver, high-speed delay module, airtight gas box, vacuum pump, gas valve, can draw dangerous gas into the airtight gas box through long-distance vacuum pipeline, so that terahertz wave can detect long-distance dangerous gas

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