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Photoacoustic spectrum gas detection device and system based on fiber Bragg grating

An optical fiber Bragg and gas detection technology, used in measurement devices, material analysis by optical means, instruments, etc., can solve problems such as low sensitivity, electromagnetic interference, complex structure, etc., to improve sensitivity, reduce noise effects, and simplify measurement. effect of structure

Active Publication Date: 2016-08-31
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] The invention provides a photoacoustic spectrum gas detection device based on fiber Bragg gratings, which solves the technical problems of complex structure, serious electromagnetic interference, low sensitivity and high cost of photoacoustic gas detection in the prior art

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  • Photoacoustic spectrum gas detection device and system based on fiber Bragg grating
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  • Photoacoustic spectrum gas detection device and system based on fiber Bragg grating

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Embodiment Construction

[0064] The embodiments of the present application provide a photoacoustic gas detection device based on fiber Bragg gratings to solve the technical problems of photoacoustic gas detection in the prior art, such as complex structure, serious electromagnetic interference, low sensitivity and high cost; Measurement sensitivity, simplified measurement structure, and technical effects of cost reduction.

[0065] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application. , rather than limiting the technical solutions of the present application, the embodiments of the present application and the technical features in the embodiments can be combin...

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Abstract

The invention belongs to the technical field of gas detection and discloses a photoacoustic spectrum gas detection device based on fiber Bragg grating. The device is characterized by comprising a detection structure, the detection structure is used for containing to-be-detected samples, and the detection structure is matched with an upper wavelength detection device, a broadband light source and a detection light source to detect the concentration of a certain to-be-detected component in mixed gas according to the photoacoustic spectrum principle; the detection structure comprises a detection gas bin and a detection fiber Bragg grating (FBG); the detection FBG is connected with the detection gas bin; when gas detection is conducted, the to-be-detected samples are placed in the detection gas bin, detection light enters the detection gas bin, the detection FBG senses pressure intensity in the detection gas bin, the wavelength shift of the detected FBG is obtained through the upper wavelength detection device, and the concentration of the to-be-detected component in the to-be-detected samples is obtained. The photoacoustic spectrum gas detection device based on fiber Bragg grating has good electromagnetic interference resistance and is reliable in detection precision and low in cost.

Description

technical field [0001] The invention relates to the technical field of gas detection, in particular to a photoacoustic spectroscopy gas detection device and system based on fiber Bragg gratings. Background technique [0002] The photoacoustic effect refers to the formation of sound waves after light is absorbed by the sample material. Can be used for gas detection. [0003] In the ultra-high-precision photoacoustic spectroscopy gas detection technology, the existing detection technology has certain limitations; for example, the sensitivity of traditional acoustic sensors cannot be further improved due to the limitation of physical factors, or the structure of the photoacoustic cell is limited. The photoacoustic effect leading to the photoacoustic pool is not strong and so on. In order to improve the above-mentioned problems, it is necessary to use high-precision acoustic sensors, which may be expensive, and at the same time lead to a complicated system structure. Generall...

Claims

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Application Information

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IPC IPC(8): G01N21/17
CPCG01N21/1702G01N2021/1704G01N2201/088
Inventor 司马朝坦丁一航杨威杨旺孙琪真刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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