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Hydrogen acoustic rotational relaxation detection method

A technology of hydrogen and gas, which is applied in the direction of measuring devices, acoustic resonance analysis, instruments, etc., can solve the problems of inapplicability of hydrogen, lack of theoretical models and detection methods, etc.

Active Publication Date: 2018-09-07
XUCHANG UNIV
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Problems solved by technology

[0004] To sum up, the problems existing in the existing technologies and theories are that most current acoustic relaxation detection methods are based on the vibrational relaxation detection of gas molecules, which are not applicable to hydrogen; For the complex, flammable and explosive dangerous gas hydrogen and hydrogen mixture, there is a lack of effective theoretical models and detection methods

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  • Hydrogen acoustic rotational relaxation detection method
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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] The application principle of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] like figure 1 As shown, the hydrogen acoustic rotational relaxation method provided by the embodiment of the present invention includes the following steps:

[0041] S101, using the relationship between ideal gas enthalpy change and constant pressure heat capacity, deduce the total effective constant pressure heat capacity formula of hydrogen;

[0042] S102. Using the relationship between the thermodynamic acoustic formula and the effective wave number, calculate the acoustic re...

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Abstract

The invention discloses a hydrogen acoustic rotational relaxation detection method and a theoretical model. The invention puts forward a detection theoretical model based on hydrogen molecule rotational relaxation by utilizing a relationship between ideal gas enthalpy change and heat capacity at constant pressure, and relaxation characteristics of hydrogen can be detected. The theoretical model not only is suitable for the hydrogen, but also is capable of combining with a vibration relaxation model of other gases so as to solve an acoustic relaxation absorption curve and an acoustic speed frequency spectrum of a hydrogen-containing mixed gas and generating a standard acoustic relaxation spectrum database of the hydrogen and the hydrogen-containing mixed gas, so that the components and theconcentration of the hydrogen mixed gas can be detected.

Description

technical field [0001] The invention belongs to the technical field of gas detection, and in particular relates to an acoustic theoretical model and method for detecting hydrogen and including hydrogen mixing. Background technique [0002] Hydrogen is rich in resources, high in calorific value, and has no pollution after combustion. The gas detection of hydrogen is of strategic significance. Hydrogen sensors currently on the market include resistive, electrochemical, spectral, semiconductor, quartz crystal, acoustic and other types. Sensing technology based on acoustic relaxation spectroscopy is an emerging interdisciplinary field. Compared with other sensing technologies, it has the following three advantages: first, the technology is simple and low-cost, and the resulting sensor is durable and repeatable; second, it can measure real-time , highly versatile and does not produce drift; finally, no pretreatment (combustion, chemical reaction or calibration) gases are require...

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Application Information

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IPC IPC(8): G01N24/00
CPCG01N24/004
Inventor 张向群陈艳格袁雅婧程菊明张克声宋运隆丁毅王奎甫
Owner XUCHANG UNIV
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