CN219161976U - Carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres - Google Patents
Carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres Download PDFInfo
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- CN219161976U CN219161976U CN202223035363.8U CN202223035363U CN219161976U CN 219161976 U CN219161976 U CN 219161976U CN 202223035363 U CN202223035363 U CN 202223035363U CN 219161976 U CN219161976 U CN 219161976U
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Abstract
The utility model relates to the technical field of carbon dioxide gas detection, and particularly provides a carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres, wherein the gas detection device comprises a gas chamber, a light source, a micro spectrometer, an integrating sphere group, an optical input fiber and an optical output fiber, wherein the optical input fiber is connected between the light source and the integrating sphere group and is used for forming an optical input path; the light-emitting optical fiber is connected between the integrating sphere group and the micro spectrometer and is used for forming a light-emitting optical path; by arranging the light source, the micro spectrometer and the integrating sphere group, an absorption spectrum detection structure for carbon dioxide can be formed, the detection sensitivity of a spectrum detection method is extremely high, and the calibration effect for low-concentration carbon dioxide gas is good; in addition, the light source and the integrating sphere group are not in vulnerable structures, and the detection precision is not affected after long-term use, so that frequent replacement is not needed, and the use cost is reduced; the utility model has the advantages of reasonable overall design, simple structure, convenient operation and use and high practicality.
Description
Technical Field
The utility model relates to the technical field of carbon dioxide gas detection, in particular to a carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres.
Background
With the rapid development of technology, the living environment of human beings faces a great threat and challenge, and the atmospheric environmental pollution also becomes the primary problem of environmental management. The method is characterized in that the method is used for measuring the harmful gas such as carbon dioxide, and the method is used for measuring the harmful gas such as nitrogen oxides, sulfur oxides, carbon oxides and the like.
In the prior art, a sensor is adopted to detect carbon dioxide, the detection accuracy of the detection mode is not high, and the detection effect is not good for low-concentration carbon dioxide; and the sensor needs to be replaced continuously, so that the use cost is high.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres, which is used for solving the problems of poor detection effect on low-concentration carbon dioxide and high use cost of the sensor in the prior art.
To achieve the above and other related objects, the present utility model provides a carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres, the gas detection device comprising:
the gas chamber is used for filling carbon dioxide gas to be measured;
a light source for emitting light;
the micro spectrometer is used for analyzing the spectrum data of the light emitted by the light source;
the integrating sphere group is arranged in the air chamber and is used for reflecting light entering the integrating sphere for multiple times and forming uniform illuminance;
the light-in optical fiber is connected between the light source and the integrating sphere group and is used for forming a light-in optical path;
the light-emitting optical fiber is connected between the integrating sphere group and the micro spectrometer and is used for forming a light-emitting optical path.
In an embodiment of the present utility model, the integrating sphere set includes a first integrating sphere and a second integrating sphere, and the first integrating sphere and the second integrating sphere are connected through an interface.
In an embodiment of the utility model, the light-in optical fiber is connected between the light source and the first integrating sphere, and the light-out optical fiber is connected between the second integrating sphere and the micro spectrometer.
In an embodiment of the utility model, the light-in optical fiber and the light-out optical fiber are multimode optical fibers.
In an embodiment of the utility model, the light source is a halogen tungsten lamp.
In an embodiment of the utility model, a wavelength range of the light emitted by the light source is 400nm to 500nm.
In an embodiment of the utility model, the gas detection device further includes a computer, and the computer is in communication connection with the micro spectrometer.
As described above, the carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres provided by the utility model has the following beneficial effects:
by arranging the light source, the micro spectrometer and the integrating sphere group, an absorption spectrum detection structure for carbon dioxide can be formed, so that the concentration of the carbon dioxide gas to be detected is extremely high in detection sensitivity of a spectrum detection method, and the calibration effect for the carbon dioxide gas with low concentration is good; in addition, the light source and the integrating sphere group are not in vulnerable structures, and the detection precision is not affected after long-term use, so that frequent replacement is not needed, and the use cost is reduced; the utility model has the advantages of reasonable overall design, simple structure, convenient operation and use and high practicality.
Drawings
Fig. 1 is a schematic diagram showing a structure of a carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres according to the present utility model.
Description of element reference numerals
A light source 1; an optical fiber 2; a gas chamber 3; an interface 4; a light-emitting optical fiber 5; a micro spectrometer 6; a computer 7; a first integrating sphere 8; a second integrating sphere 9.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
Please refer to fig. 1. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
Referring to fig. 1, the utility model provides a carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres, wherein the gas detection device comprises a gas chamber 3, a light source 1, a micro spectrometer 6, an integrating sphere group, an optical input fiber 2 and an optical output fiber 5, wherein the optical input fiber 2 is connected between the light source 1 and the integrating sphere group and is used for forming an optical input path; the light-emitting optical fiber 5 is connected between the integrating sphere group and the micro spectrometer 6 and is used for forming a light-emitting optical path; the gas chamber 3 is used for filling carbon dioxide gas to be measured, the light source 1 is used for emitting light, and the micro spectrometer 6 is used for analyzing spectral data of the light emitted by the light source 1; the integrating sphere group is arranged in the air chamber 3 and is used for reflecting light entering the integrating sphere for a plurality of times and forming uniform illuminance; the gas detection device also comprises a computer 7, wherein the computer 7 is in communication connection with the micro spectrometer 6; light emitted by the light source 1 enters a light incidence port of the integrating sphere group of the air chamber 3 through the light incidence optical fiber 2, then the light which is diffusely reflected and emitted by the integrating sphere group enters an incidence port of the micro spectrometer 6 through the light emitting optical fiber 5, and spectrum data of the micro spectrometer 6 are displayed on the computer 7.
The integrating sphere group comprises a first integrating sphere 8 and a second integrating sphere 9, the first integrating sphere 8 and the second integrating sphere 9 are connected through an interface 4, the light-in optical fiber 2 is connected between the light source 1 and the first integrating sphere 8, and the light-out optical fiber 5 is connected between the second integrating sphere 9 and the micro spectrometer 6.
The light-in optical fiber 2 and the light-out optical fiber 5 are multimode optical fibers, the multimode optical fibers are optical fibers capable of transmitting a plurality of light conduction modes, and the optical paths formed by the multimode optical fibers are simple to connect and convenient to use.
The light source 1 is a halogen tungsten lamp, which is an inflatable incandescent lamp filled with gas and containing partial halogen elements or halides, and has the advantages of small volume, luminous efficiency, stable color temperature, almost no light attenuation, long service life and the like; the wavelength range of the light emitted from the light source 1 is 400nm to 500nm.
The implementation of the carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres comprises the following steps:
step one: connecting instrument equipment, and checking the air tightness of the air chamber 3;
step two: after the system light path is regulated, clean the air chamber 3 by using pure high-purity air to ensure that the background gas in the air chamber 3 is air, turn on the micro spectrometer 6 to scan spectrum data, and record the background spectrum data at the moment on the computer 7;
step three: filling carbon dioxide gas into the air chamber 3, dispersing the carbon dioxide gas into the integrating sphere group, and continuously scanning spectrum data by the micro spectrometer 6, waiting for a period of time to observe the spectrum data on the computer 7, wherein the acquired data is an absorption spectrum;
step four, calculating the absorption spectrum data obtained in the step three through a Lambert-Beer law:
sigma (lambda) is the carbon dioxide gas absorption cross section, l is the integration of light into carbon dioxide gasEquivalent optical path length in the sphere chamber, I (lambda) is the original light intensity, I 0 And (lambda) is the light intensity after gas absorption, the wavelength range of the absorption light selected by the gas to be detected is 400-500 nm, and the concentration c of the carbon dioxide gas to be detected can be obtained.
In summary, according to the carbon dioxide gas detection device based on diffuse reflection of the two connected integrating spheres, the light source, the micro spectrometer and the integrating sphere group are arranged, so that an absorption spectrum detection structure for carbon dioxide can be formed, the concentration of the detected carbon dioxide gas is extremely high, and the detection sensitivity of a spectrum detection method is extremely high, and the correction and detection effect for the carbon dioxide gas with low concentration is good; in addition, the light source and the integrating sphere group are not in vulnerable structures, and the detection precision is not affected after long-term use, so that frequent replacement is not needed, and the use cost is reduced; the utility model has the advantages of reasonable overall design, simple structure, convenient operation and use and high practicality. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (7)
1. Carbon dioxide gas detection device based on diffuse reflection of two consecutive integrating spheres, characterized in that, gas detection device includes:
a gas chamber (3) for filling carbon dioxide gas to be measured;
a light source (1) for emitting light;
a micro spectrometer (6) for analyzing spectral data of the light emitted by the light source (1);
the integrating sphere group is arranged in the air chamber (3) and is used for reflecting light entering the integrating sphere for multiple times and forming uniform illuminance;
the light-entering optical fiber (2), the light-entering optical fiber (2) is connected between the light source (1) and the integrating sphere group and is used for forming a light-entering optical path;
the light-emitting optical fiber (5), the light-emitting optical fiber (5) is connected between the integrating sphere group and the micro spectrometer (6) and is used for forming a light-emitting optical path.
2. The carbon dioxide gas detection apparatus based on diffuse reflection of two connected integrating spheres according to claim 1, wherein: the integrating sphere group comprises a first integrating sphere (8) and a second integrating sphere (9), and the first integrating sphere (8) is connected with the second integrating sphere (9) through an interface (4).
3. The carbon dioxide gas detection apparatus based on diffuse reflection of two connected integrating spheres according to claim 2, wherein: the light-in optical fiber (2) is connected between the light source (1) and the first integrating sphere (8), and the light-out optical fiber (5) is connected between the second integrating sphere (9) and the micro spectrometer (6).
4. A carbon dioxide gas detection apparatus based on diffuse reflection of two connected integrating spheres according to claim 3, wherein: the light-in optical fiber (2) and the light-out optical fiber (5) are multimode optical fibers.
5. The carbon dioxide gas detection apparatus based on diffuse reflection of two connected integrating spheres according to claim 1, wherein: the light source (1) is a halogen tungsten lamp.
6. The carbon dioxide gas detection apparatus based on diffuse reflection of two connected integrating spheres according to claim 5, wherein: the wavelength range of the light emitted by the light source (1) is 400 nm-500 nm.
7. The carbon dioxide gas detection apparatus based on diffuse reflection of two connected integrating spheres according to any one of claims 1 to 6, wherein: the gas detection device also comprises a computer (7), and the computer (7) is in communication connection with the micro spectrometer (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223035363.8U CN219161976U (en) | 2022-11-14 | 2022-11-14 | Carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres |
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| CN202223035363.8U CN219161976U (en) | 2022-11-14 | 2022-11-14 | Carbon dioxide gas detection device based on diffuse reflection of two connected integrating spheres |
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| CN219161976U true CN219161976U (en) | 2023-06-09 |
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