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Optical frequency comb gas detection system and method based on neural network

A gas detection system and optical frequency comb technology, applied in neural learning methods, biological neural network models, neural architectures, etc., can solve the problems of inability to achieve identification and effective measurement, no gas identification, etc., to increase the effective optical path, The effect of fast training speed and increased absorption

Active Publication Date: 2021-09-17
SHANDONG UNIV
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Problems solved by technology

That is: gas measurement is performed on the premise of known gas composition, and it is impossible to identify and effectively measure unknown gases
There is no research on gas identification based on optical frequency comb at home and abroad

Method used

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  • Optical frequency comb gas detection system and method based on neural network
  • Optical frequency comb gas detection system and method based on neural network
  • Optical frequency comb gas detection system and method based on neural network

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Embodiment Construction

[0031] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0032] In order to solve the problems existing in gas detection in the prior art, this embodiment provides a neural network-based optical frequency comb gas detection system, such as figure 1 As shown, the system mainly includes: a laser controller 1 , an optical frequency comb 2 , a detection gas chamber 3 , a reference gas chamber 4 , an InGaAs avalanche photodiode 5 , a data acquisition card 6 , and a...

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Abstract

The invention belongs to the technical field of gas measurement, and relates to an optical frequency comb gas detection system and method. The system comprises an optical frequency comb, an air chamber, a photodiode, a data acquisition card and a detection unit, wherein the gas chamber is connected with the photodiode through an optical fiber, and the data acquisition card acquires an electric signal transmitted by the photodiode and sends the electric signal to the detection unit; the detection unit is used for calculating and processing the received electric signal to measure the type and the concentration of the gas; and the gas chamber comprises a reference gas chamber and a reference gas chamber. The system is provided with double air chambers, spherical mirrors are installed at the two ends of the air chambers, and the spherical mirrors form an array through a plurality of small spherical mirrors; therefore, the incident light beam can be reflected for multiple times in the gas chamber, the effective optical path is increased, and the absorbance of the gas to the incident light is effectively increased. Besides, after the trace gas components are determined by adopting the neural network model, the concentration calculation is performed on specific gas, so that the method has the advantages of high nonlinear mapping capability, high training speed and the like.

Description

technical field [0001] The invention belongs to the technical field of gas measurement, and relates to an optical frequency comb gas detection system and method. Background technique [0002] With the rapid development of the national economy and the continuous advancement of industrial technology, environmental pollution problems such as air pollution and soil pollution have become increasingly serious. Especially air pollution, industrial waste gas, domestic waste gas, leaked toxic gas, automobile exhaust, etc. will not only cause environmental problems such as global warming, but also cause human respiratory system infection, cardiovascular and cerebrovascular, oxidative damage of vascular skin cells and other diseases . Under this background, the new laser spectrum gas detection technology has become a new research hotspot in the application of environmental monitoring. [0003] Optical Frequency Comb (Optical Frequency Comb) technology emerged under the above backgrou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/27G06K9/62G06N3/04G06N3/08
CPCG01N21/31G01N21/278G06N3/084G06N3/045G06F18/241Y02A50/20
Inventor 张飒飒田遴博陈天弟夏金宝王骏齐王韬
Owner SHANDONG UNIV
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