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Single-fiber mixed gas component recognition and concentration detection sensing device

A mixed gas and concentration detection technology, applied in the measurement of scattering characteristics, etc., can solve the problems of increasing the system volume and structural complexity, and achieve the effect of good technology transformation foundation, good market prospects, and reduced complexity.

Active Publication Date: 2018-12-07
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the identification of more components of the mixed gas, a large number of filters need to be used, thus increasing the volume and structural complexity of the system

Method used

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  • Single-fiber mixed gas component recognition and concentration detection sensing device
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  • Single-fiber mixed gas component recognition and concentration detection sensing device

Examples

Experimental program
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Embodiment 1

[0039] The embodiment of the present invention mainly utilizes the spatial distribution law of the cores of the multi-core optical fiber to effectively reduce the volume of the optical fiber gas detection device through the single fiber structure. Since the signal light transmitted by different fiber cores has different wavelengths, there is no need for a multi-core fiber coupling device, and it is not limited by the problem of signal crosstalk between different core fibers of the multi-core fiber. The device can effectively realize mixed gas detection and greatly enrich the performance of the gas sensor.

[0040] Firstly, the microstructure of different cores of the multi-core optical fiber is processed, and the microstructure gratings related to the central wavelength and the absorption peak of different gases are respectively written, and then a square perforation is made in the unetched multi-core optical fiber area as a gas chamber for the mixed gas. Together with the mod...

Embodiment 2

[0043] The scheme in Example 1 is further introduced below in conjunction with specific implementation methods, see the following description for details:

[0044] Such as figure 2 As shown, the single-fiber mixed gas component identification and concentration detection simultaneous sensing device provided by the embodiment of the present invention mainly includes two parts: a mode field adaptive optical fiber structure and a micro-processed multi-core optical fiber. The organic combination of the two realizes the single-fiber mixed gas component identification and concentration detection device proposed by the embodiment of the present invention.

[0045] Among them, the mode-field-adapted fiber structure includes: a single-mode fiber 1 with a core / cladding diameter of 10 / 125 μm connected in sequence, a mode-field matching region 2, and a multi-mode fiber with a core / cladding diameter of 105 / 125 μm 3. The single-mode optical fiber 1 and the multi-mode optical fiber 3 are c...

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Abstract

The invention discloses a single-fiber mixed gas component recognition and concentration detection sensing device. The device includes two parts: a mode-field adaptive optical fiber structure and micro-processed multi-core optical fiber. The spatial distribution law of the fiber core in the micro-processed multi-core optical fiber is utilized, and the mode-field adaptive optical fiber structure isemployed to reduce the volume of the optical fiber gas detection device, and micro-structure processing is carried out on different fiber cores of the multi-core optical fiber to etch microstructuregratings with the central wavelength related to different gas absorption peaks respectively; and a hole is punched in an unetched multi-core optical fiber area to serve as an air chamber of mixed gasto compose the single-fiber gas component recognition and concentration detection device together with the mode-field adaptive optical fiber structure. According to the invention, the complexity of optical fiber mixed gas concentration detection device is lowered, the system volume is reduced, and the structural stability and multiplexing ability of the system are improved.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing and detection, in particular to a single fiber mixed gas component identification and concentration detection simultaneous sensing device. Background technique [0002] Optical fiber gas sensing is widely used in the detection of toxic and harmful gases in environmental governance, chemical production, electric power and other industries due to its advantages of strong anti-electromagnetic interference, high reliability, and easy networking for remote detection. The traditional optical fiber gas sensing system focuses on the concentration detection of a single gas, which reduces the reuse rate of the system. Compared with single gas concentration detection, the design of mixed gas component identification and concentration detection system can effectively expand the function of the system and reduce the cost of using the optical fiber gas concentration detection system. [0003] Opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/55
CPCG01N21/55Y02A50/20
Inventor 张海伟薛力芳白扬博杨晓苹苗银萍任广军
Owner TIANJIN UNIVERSITY OF TECHNOLOGY