Scattering enhanced gas sensing probe

A gas sensing and enhanced technology, applied in measuring devices, material analysis through optical means, instruments, etc., can solve the problem of low sensitivity of non-resonant photoacoustic systems, improve working stability and reliability, and improve absorption Effect of improving optical path length and detection sensitivity

Inactive Publication Date: 2019-06-11
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to propose a scattering-enhanced gas sensing probe based on photoacoustic spectroscopy to solve the problem of low sensitivity of traditional non-resonant photoacoustic systems

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  • Scattering enhanced gas sensing probe

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0018] It should be understood that the appended drawings are not to scale, presenting a suitably simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, locations and shapes will be determined in part by the particular intended application and use environment.

[0019] In the accompanying figures, the same or equivalent parts (elements) are designated with the same reference numerals.

[0020] figure 1 It is a structural schematic diagram of the scattering-enhanced gas sensing probe provided in the embodiment of the present invention. see figure 1 , the scattering-enhanced gas sensing probe provided in this embodiment includes a metal she...

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Abstract

The invention belongs to the technical field of trace gas detection, and provides a scattering enhanced gas sensing probe comprising a metal shell, a non-resonant photo-acoustic cavity, a porous scattering medium, a fiber F-P sonic sensor sensitive film, a gold-plated reflector, a photo-acoustic excitation light source incident fiber, a fiber collimator, a fiber F-P sonic sensor detection light source incident fiber, a F-P cavity, an air inlet and an air outlet, wherein the metal shell is detachably connected with one end of the non-resonant photo-acoustic cavity, and the gold-plated reflectoris fixed at the other end of the non-resonant photo-acoustic cavity; the porous scattering medium is filled into the non-resonant photo-acoustic cavity; a groove is formed in one surface of the metalshell and sealed by the fiber F-P sonic sensor sensitive film, and thus the F-P cavity is formed; the metal shell is provided with the fiber F-P sonic sensor detection light source incident fiber andthe photo-acoustic excitation light source incident fiber. The scattering enhanced gas sensing probe can improve the absorption optical distance of the gas, and enhance the detection sensitivity of the trace gas.

Description

technical field [0001] The invention belongs to the technical field of trace gas detection, and relates to a high-sensitivity scattering-enhanced gas sensing probe based on photoacoustic spectrum technology. Background technique [0002] Trace gas detection technology plays an important role in applications such as power system fault characteristic gas analysis, respiratory gas detection in the medical field, and industrial harmful gas emission monitoring. At present, the trace gas detection methods mainly include gas chromatography, semiconductor gas sensor method, electrochemical sensor method, absorption spectroscopy and photoacoustic spectroscopy. With the development of laser technology, photoacoustic spectroscopy has become a gas detection method with high sensitivity, fast response time and strong selectivity. Photoacoustic spectroscopy is a spectrocalorimetric technique that directly measures the heat energy produced by a gas due to the absorption of light energy, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
Inventor 宫振峰梅亮陈珂于清旭
Owner DALIAN UNIV OF TECH
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