Gas sampling room

A technology of gas sampling and sampling chamber, which is applied in the direction of sampling device, measuring device, material analysis through optical means, etc., to achieve the effect of improving the ability to resist dust or water vapor interference

Active Publication Date: 2008-04-02
SHENZHEN WINPOWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some realistic use environments (such as high dust environment, high humidity environment, small hand-held applications, portable applications with limited energy, etc.), the above measures or Difficult to use, or unable to avoid the adsorption of water vapor and dust on the wall of the sampling chamber

Method used

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the present invention should not be limited to these embodiments.

[0027] As shown in Figure 2, in the present embodiment, the structure of the gas sampling chamber 2 is as follows: the cavity 21 of the gas sampling chamber is provided with openings 23 and 24 through which the inner cavity 22 communicates with the outside world, and in the cavity of the sampling chamber 21 is also provided with windows 25 and 26 that allow light to pass through, and, on the inner cavity wall 27 of the sampling chamber cavity 21, is provided with an impeding reflection layer made of a material with near zero infrared reflectivity—it can be formed by the The material that strongly absorbs infrared light is made, or the inner surface is coated with a material that strongly absorbs infrared light, and the surface of the inner cavity wall 27 of the sampling chambe...

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Abstract

The invention discloses a gas-sampling chamber which is applied in infrared gas analysis instrument (or sensor) field, is capable of reducing the affect of dust and water vapour on measurement accuracy furthermost so as to improve measurement accuracy. The chamber structure comprises a cavity body which is provided with an opening that allows an inner cavity to be communicated with the outside and a window that beam can permeate, and is characterized in that the inner cavity of the sampling chamber is also provided with a device that is capable of blocking the reflection of beams, which can be realized by making the inner cavity wall more rough, making the inner cavity wall with material that absorbs infrared light intensely, painting substance that absorbs infrared light on the inner wall surface or arranging a reflected light blocking ring that can block reflected light from entering the infrared detector in the sampling chamber cavity body. Then the rate of the reflected light reaching the infrared detector is approximate to zero, thereby improving the anti-dust capability and the anti-water vapour interference capability of the infrared gas analysis instrument (or sensor).

Description

technical field [0001] The invention relates to the field of infrared gas analysis instruments, in particular to a gas sampling chamber used in the field of infrared gas analysis or the field of infrared gas sensors. Background technique [0002] In the field of infrared gas analysis, non-dispersive infrared gas analysis technology (Non-Dispersive Infrared, NDIR) has been widely used. NDIR technology has long been considered one of the best methods for gas measurement. Non-dispersive infrared gas analyzer (or sensor) not only has the characteristics of high efficiency, but also has the advantages of special sensitivity, stability, reliability, long life and easy maintenance. The main disadvantage of non-dispersive infrared measurement technology is that the structure is relatively complicated and expensive. The gas sampling chamber is a commonly used component in the field of non-dispersive infrared gas analysis. [0003] As shown in Figure 1, a typical dual-channel non-d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N21/01
Inventor 李明
Owner SHENZHEN WINPOWER TECH CO LTD
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