Absorption cell for gas detection

A gas absorption cell and gas detection technology, which is used in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of difficult adjustment of the optical path and poor shock resistance, and achieve compact structure, good shock resistance and small volume. Effect

Active Publication Date: 2017-09-15
上海禾楷电气科技有限公司
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  • Abstract
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Problems solved by technology

[0005] In order to solve the above-mentioned problems of the long optical path cell and the adjustable optical path cell in the prior art, the present invention provides a small volume short optical path gas absorpt...

Method used

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  • Absorption cell for gas detection

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Embodiment Construction

[0021] The technical solutions of the present invention will be described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some, not all, implementations of the application; and the structures shown in the drawings are only schematic and do not represent real objects. It should be noted that, based on these embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art belong to the protection scope of the present application.

[0022] In the present invention, the terms "gas absorption cell" and "absorption cell" have the same meaning and can be interchanged.

[0023] Herein, the term "front" represents the positional relationship along the upstream of the light beam direction in the gas absorption cell of the present invention, but it does not mean that it must face a certain fixed direction in the actual installation operation, only to show the relationship between the various c...

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Abstract

The invention discloses an absorption cell for gas detection. The absorption cell comprises an optical fiber collimation module, a focusing module and a cavity located between the optical fiber collimation module and the focusing module, wherein the optical fiber collimation module comprises an optical fiber collimator, a precise dimming structure and an optical fiber collimation module fixing end; the focusing module comprises a focusing lens and a focusing module fixing end, and the optical axis of the focusing lens coincides with the central axis of a cavity air chamber and the optical axis of the optical fiber collimation module; two ends of the cavity are connected with the optical fiber collimation module fixing end and the focusing module fixing end in a sealed manner, the hollow part of the cavity is the air chamber for accommodating to-be-detected gas, and the lateral side of the air chamber is provided with a gas inlet and a gas outlet, and the top of the gas chamber is provided with threaded holes used for mounting at least one sensor for detecting parameters such as the temperature and the pressure of the gas chamber. The gas absorption cell is small in size, short in optical path, simple in structure, convenient to mount, debug and maintain, applicable to the detection of ppm-level dissolved gas in transformer oil, and the like.

Description

technical field [0001] The invention belongs to the field of precision detection instruments, and in particular relates to an absorption cell for gas detection, in particular to a gas absorption cell for detecting dissolved gas in transformer oil. Background technique [0002] The technology of measuring single-component or multi-component gases by spectrometry has become more and more widely used in industry. For example, laser spectrometers can be used to monitor dissolved gases in transformer oil. Due to the "fingerprint" characteristics of gas absorption, after the light passes through the absorption cell filled with the gas to be detected, a single frequency of light is absorbed by the gas in the cell, the single frequency reflects the gas composition, and the change of the single frequency light intensity reflects the The concentration of the gas to be detected. The detection process of this gas composition is widely used in the fields of industrial production and en...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/3504
CPCG01N21/01G01N21/3504
Inventor 陈银龙
Owner 上海禾楷电气科技有限公司
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