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Photoacoustic spectral enhancement device and method for gas detection using the same

A technology for enhancing devices and photoacoustic spectroscopy, which is applied in the direction of material analysis, measuring devices, instruments, etc. by optical means to achieve the effects of stable photoacoustic effect, good anti-interference ability, and good photoacoustic signal amplification ability.

Active Publication Date: 2022-07-01
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cylindrical photoacoustic gas chamber still has a certain upper limit for the amplification of acoustic signals, so a photoacoustic spectroscopy gas detection structure that further amplifies acoustic signals is needed, and an efficient photoacoustic spectroscopy that can detect multiple gases is urgently needed Detection device

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  • Photoacoustic spectral enhancement device and method for gas detection using the same
  • Photoacoustic spectral enhancement device and method for gas detection using the same
  • Photoacoustic spectral enhancement device and method for gas detection using the same

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Embodiment Construction

[0043]The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

[0044] It should be noted t...

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Abstract

The invention provides a photoacoustic spectrum enhancement device and a gas detection method. The photoacoustic spectrum enhancement device includes the following structure: a prismatic photoacoustic gas cell with a bottom surface of an even number of regular polygons; A plurality of mutually intersecting gas resonant cavities in the gas pool, the resonant cavities extend along the direction parallel to the bottom surface and between two sides symmetrical along the center of the prism, the number of sides of the prism is an even number, and all The center points of the plurality of resonant cavities in the same plane parallel to the bottom surface intersect and overlap each other; there is a buffer cavity between the side surface of the prism and the resonant cavity, and each resonant cavity is connected to two of the resonant cavities. The buffer chambers communicate with each other; a hole slot is provided at the cross-overlapping position, and a microphone is arranged in the hole slot. In practical application, it can be finely adjusted as required to realize photoacoustic signal enhancement or simultaneous detection of multiple gases, and the invention also has the advantages of simple processing and small volume.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a resonant photoacoustic spectrum enhancement device for gas photoacoustic spectrum detection and a method for gas detection using the photoacoustic spectrum enhancement device. Background technique [0002] Photoacoustic spectroscopy is a gas detection technology based on the principle that gas has selective absorption of infrared light of different wavelengths. The technology mainly uses the gas to absorb light to generate thermal expansion, and then modulate the input light periodically to make the gas expansion appear periodic to induce sound waves, and use a microphone to detect the sound waves to achieve gas sensing. However, because the photoacoustic effect is very weak, it is difficult to detect photoacoustic signals, and the high application cost of photoacoustic spectroscopy limits the application of photoacoustic spectroscopy. The photoacoustic gas chamber of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/17G01N21/01
CPCG01N21/1702G01N21/01G01N2021/1704
Inventor 朱维润黎敏
Owner WUHAN UNIV OF TECH
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