CN109765184B - Optical gas absorption cell and optical gas detection system - Google Patents
Optical gas absorption cell and optical gas detection system Download PDFInfo
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- CN109765184B CN109765184B CN201910039861.3A CN201910039861A CN109765184B CN 109765184 B CN109765184 B CN 109765184B CN 201910039861 A CN201910039861 A CN 201910039861A CN 109765184 B CN109765184 B CN 109765184B
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Abstract
The invention relates to the field of gas detection, in particular to an optical gas absorption cell and an optical gas detection system. An optical gas absorption cell comprising: an incident mirror having a plurality of incident windows; the exit mirror is arranged in parallel with the incident mirror and is provided with a plurality of exit windows which are in one-to-one correspondence with the plurality of incident windows; the wavelengths of the light beams emitted through the exit windows are different, and the light beams are used for simultaneously detecting the concentration of each component in the mixed gas. According to the optical gas absorption cell and the optical gas detection system, the plurality of incident windows are arranged on the incident mirror, the plurality of emergent windows are arranged on the emergent mirror in a one-to-one correspondence mode, and the wavelengths of laser emitted by the emergent windows are different, so that the function of simultaneously detecting the concentration of each component in the mixed gas is achieved, the gas consumption is low, and the reaction speed is high.
Description
Technical Field
The invention relates to the field of gas detection, in particular to an optical gas absorption cell and an optical gas detection system.
Background
The gas absorption cell has multiple implementation methods, wherein the optical gas absorption cell is generally provided with two reflectors, and the two reflectors are adjusted to enable the detection light to be reflected for multiple times between the two reflectors and finally to be emitted through a preset emergent hole position.
Generally, when gas multi-component measurement is carried out, a plurality of single-component detection gas absorption cells are connected in series from front to back, and gas passes through each gas absorption cell in sequence, so that the gas consumption is high, and the reaction speed is low.
Disclosure of Invention
Therefore, the optical gas absorption cell and the optical gas detection system can simultaneously detect the concentration of each component in the mixed gas, and are low in gas consumption and high in reaction speed.
An optical gas absorption cell comprising:
an incident mirror having a plurality of incident windows;
the exit mirror is arranged in parallel with the incident mirror and is provided with a plurality of exit windows which are in one-to-one correspondence with the plurality of incident windows;
the wavelengths of the light beams emitted through the exit windows are different, and the light beams are used for simultaneously detecting the concentration of each component in the mixed gas.
In one embodiment, the distance between the center of each of the entrance windows and the center of the entrance mirror is different.
In one embodiment, the plurality of entrance windows are uniformly distributed over the entrance mirror.
In one embodiment, the plurality of entrance windows includes a central entrance window having a center point overlapping a center point of the entrance mirror.
In one embodiment, the entrance mirror comprises a central entrance mirror segment and at least one lateral entrance mirror segment radially surrounding the central entrance mirror segment;
the exit mirror comprises a central exit mirror section and at least one lateral exit mirror section, and the at least one lateral exit mirror section radially surrounds the central exit mirror section; and
the plurality of incidence windows comprise a central incidence window distributed on the central incidence mirror segment and at least one incidence side window distributed on the at least one side incidence mirror segment;
the plurality of exit windows comprise an exit central window distributed in the central exit mirror segment and at least one exit lateral window distributed in the at least one lateral exit mirror segment;
the circle center of the at least one lateral incident mirror segment is superposed with the circle center of the central incident mirror segment, and the circle center of the at least one lateral emergent mirror segment is superposed with the circle center of the central emergent mirror segment;
the adjacent central incident mirror segment and at least one lateral incident mirror segment have different parameters;
the adjacent central exit mirror segment and at least one lateral exit mirror segment have different parameters; and
the parameter is at least one of a radius or a focal length.
In one embodiment, the at least one lateral entrance mirror segment comprises a second entrance mirror segment and a third entrance mirror segment, and the at least one lateral exit mirror segment comprises a second exit mirror segment and a third exit mirror segment.
In one embodiment, the optical gas absorption cell further comprises:
the gas cavity is used for containing the mixed gas;
wherein the incident mirror and the exit mirror are respectively positioned at two ends of the gas cavity.
In one embodiment, the gas chamber includes at least one gas inlet hole and at least one gas outlet hole.
An optical gas detection system comprising:
a plurality of lasers; and
an optical gas absorption cell according to any one of claims 1 to 5;
the wavelength of the laser is matched with each component to be detected in the mixed gas.
In one embodiment, the laser is a tunable laser.
In one embodiment, the position of the laser is set according to the matched gas composition;
the laser matched with the gas component with low laser absorption concentration is arranged on the incident window far away from the center of the incident mirror, so that the corresponding gas absorption optical path is increased.
In one embodiment, the optical gas detection system further comprises:
and the collimators are respectively positioned between the lasers and the incident windows and are used for collimating the emergent laser of the lasers.
In one embodiment, the optical gas detection system further comprises:
and the detectors are respectively arranged behind the exit windows and are used for detecting the intensity of the absorbed laser light so as to obtain the concentration of each component of the mixed gas.
According to the optical gas absorption cell and the optical gas detection system, the plurality of incident windows are arranged on the incident mirror, the plurality of emergent windows are arranged on the emergent mirror in a one-to-one correspondence mode, and the wavelengths of laser emitted by the emergent windows are different, so that the function of simultaneously detecting the concentration of each component in the mixed gas is achieved, the gas consumption is low, and the reaction speed is high.
Drawings
FIG. 1 is a schematic view of the structure of a gas absorption cell in one embodiment;
FIG. 2 is a schematic diagram of an embodiment of an incident mirror;
FIG. 3 is a schematic structural diagram of an exit mirror in the embodiment of FIG. 2;
FIG. 4 is a schematic diagram of an optical gas detection system in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An optical gas absorption cell 100 can be used for detecting the concentration of each component in a mixed gas, and the optical gas absorption cell 100 can comprise an incident mirror 110 and an exit mirror 120, wherein the incident mirror 110 is provided with a plurality of incident windows, the exit mirror 120 is arranged in parallel relative to the incident mirror 110, and the exit mirror 120 is provided with a plurality of exit windows corresponding to the incident windows one by one.
Fig. 1 is a schematic structural diagram of a gas absorption cell in an embodiment, as shown in fig. 1, the plurality of entrance windows may include a first entrance window 111, a second entrance window 112, and a third entrance window 113, and correspondingly, the plurality of exit windows may include a first exit window 121, a second exit window 122, and a third exit window 123.
In one embodiment, the first light beam exiting through the first exit window 121 has a wavelength λ1The wavelength of the second light beam exiting through the second exit window 122 is λ2The wavelength of the third light beam exiting through the third exit window 123 is λ3And satisfy λ1≠λ2≠λ3. The first light beam, the second light beam and the third light beam are respectively used for measuring the concentration of three different components in the mixed gas.
In particular, to obtain wavelengths respectively λ1、λ2、λ3The first, second and third light beams can be incident on the first, second and third incident windows 111, 112 and 113 respectively with a wavelength λ1、λ2、λ3The light flux of (2) may be incident on the first incidence window 111, the second incidence window 112, and the third incidence window 113, respectively, and may include λ1、λ2、λ3The mixed light of the light beams is filtered by a first incidence window 111, a second incidence window 112 and a third incidence window 113 respectively to obtain the wavelengths lambda respectively1、λ2、λ3The monochromatic wave of (2).
In one embodiment, the distances from the centers of the first entrance window 111, the second entrance window 112 and the third entrance window 113 to the center of the entrance mirror 110 are R1、R2、R3And satisfy R1≠R2≠R3I.e. the distance from the center of the entrance mirror 110 to the center of each entrance window is different. Specifically, the first incident window 111 may be disposed at a distance R from the center of the incident mirror 1101At any point on the ring, the second entrance window 112 may be disposed away from the entranceMirror 110 center distance R2At any point on the ring, the third entrance window 113 may be disposed at a distance R from the center of the entrance mirror 1103At any point on the ring.
In one embodiment, the first entrance window 111, the second entrance window 112, and the third entrance window 113 are uniformly distributed along the radial direction of the entrance mirror 110, that is, R is satisfied1-R2＝R2-R3. The uniform distribution of the entrance windows reduces interference between the beams.
In one embodiment, the third entrance window 113 is centered on the center of the entrance mirror 110, that is, the plurality of entrance windows includes an entrance window centered on the center of the entrance mirror 110.
It should be noted that the first incidence window 111, the second incidence window 112, and the third incidence window 113 are uniformly arranged, and the center of one incidence window is located at the center of the incidence mirror 110, so as to reduce interference between the light beams as much as possible, and accommodate a larger number of light beams as much as possible, so as to be able to detect the concentration of a larger number of mixed gas components. When the composition of the mixed gas is simple, the arrangement of the incident windows may not necessarily require uniform distribution, nor may they be located at the center of the incident mirror.
In one embodiment, the entrance mirror comprises a central entrance mirror segment and at least one lateral entrance mirror segment radially surrounding the central entrance mirror segment;
the exit mirror comprises a central exit mirror section and at least one lateral exit mirror section, and the at least one lateral exit mirror section radially surrounds the central exit mirror section; and
the plurality of incidence windows comprise an incidence central window distributed on the central incidence mirror section and at least one incidence lateral window distributed on the at least one lateral incidence mirror section;
the plurality of exit windows comprise an exit central window distributed in the central exit mirror segment and at least one exit lateral window distributed in the at least one lateral exit mirror segment;
wherein the adjacent central incident mirror segment and at least one lateral incident mirror segment have different radii or focal lengths; and
the adjacent central exit mirror segments and at least one lateral exit mirror segment have different radii or focal lengths.
In one embodiment, the at least one lateral entrance mirror segment comprises a second entrance mirror segment and a third entrance mirror segment, and the at least one lateral exit mirror segment comprises a second exit mirror segment and a third exit mirror segment.
Specifically, the first light beam propagates back and forth between the first incident mirror section and the first exit mirror section to be absorbed so as to measure the concentration of the first component of the mixed gas; the second light beam propagates back and forth between the second incident mirror section and the second exit mirror section for absorption to measure a concentration of a second component of the mixed gas; the third light beam is absorbed by traveling back and forth between the third reflector segment and the third exit mirror segment to measure the concentration of a third component of the mixed gas.
In one embodiment, the optical gas absorption cell 100 further comprises:
the gas cavity is used for containing the mixed gas;
wherein the incident mirror and the exit mirror are respectively positioned at two ends of the gas cavity.
In one embodiment, the gas chamber includes at least one gas inlet hole and at least one gas outlet hole.
The optical gas absorption cell of the present application will be described in detail below with reference to specific applications:
fig. 2 is a schematic structural diagram of an incident mirror in an embodiment, and fig. 3 is a schematic structural diagram of an exit mirror in the embodiment of fig. 2. As shown in fig. 2, the incidence mirror has three incidence windows a1, C1, E1, wherein the center of E1 is located on the center of the incidence mirror, and a1, C1, E1 are on the same straight line; accordingly, as shown in fig. 3, the exit mirror has three exit windows B1, D8, F1. Note that a1 may be provided at any position on a circle at a distance R1 from the center of the incident mirror, and C1 may be provided at any position on a circle at a distance R2 from the center of the incident mirror. In the measurement process, a first incident beam enters an optical gas absorption cell from an A1 incident window, is transmitted to a B1 point on an exit mirror, is reflected to an A2 point on the incident mirror through a B1 point, is reflected to a B2 point on the exit mirror through an A2 point, is circularly reflected between the incident mirror and the exit mirror in sequence, and finally exits from a B12 point of the exit mirror; the second incident beam enters the optical gas absorption cell from the C1 incident window, is transmitted to a D1 point on the exit mirror, is reflected to a C2 point on the incident mirror through a D1 point, is reflected to a D2 point on the exit mirror through a C2 point, is circularly reflected between the incident mirror and the exit mirror in sequence, and finally exits from a D8 point of the exit mirror; the third incident beam enters the optical gas absorption cell from the E1 entrance window, is transmitted to F1 on the exit mirror, and exits from point F1.
The present application further provides an optical gas detection system 10, fig. 4 is a schematic structural diagram of an optical gas detection system in an embodiment, as shown in fig. 4, the optical gas detection system 10 is configured to detect concentrations of components in a mixed gas, the optical gas detection system 10 may include a plurality of lasers 200, and the optical gas absorption cell 100 provided in any of the above embodiments, wherein the plurality of lasers 200 may respectively generate a plurality of light beams with a single wavelength, and the wavelengths of the plurality of lasers 200 may be selected according to the components of the mixed gas. It should be noted that the number of the lasers is determined according to the number of the components of the mixed gas to be measured, and when the number of the components to be measured of the mixed gas to be measured is N, the number of the lasers to be correspondingly set is N.
In one embodiment, the plurality of lasers 200 may be tunable lasers. The tunable laser may continuously vary the laser output wavelength over a range.
In one embodiment, the plurality of lasers 200 may be disposed according to the corresponding gas components, wherein the laser corresponding to the gas component having a low absorption concentration of laser light is disposed at the incident window far from the center of the incident mirror, so that the corresponding gas absorption optical path length is increased. Specifically, the detection accuracy of the optical gas detection system 10 for each gas is proportional to the absorption intensity and the absorption optical path of the gas for the corresponding light beam, and in order to ensure that the detection accuracy of the optical gas detection system 10 for each component is as close as possible, a gas component with high absorption intensity may be incident from an incident window close to the center of the incident mirror, that is, the absorption optical path of the gas component is reduced, and a gas component with low absorption intensity may be incident from an incident window far from the incident mirror, that is, the absorption optical path of the gas component is increased.
In one embodiment, the optical gas detection system 10 further comprises a plurality of collimators 300, and the plurality of collimators 300 are respectively located between the plurality of lasers 200 and the plurality of entrance windows and are used for collimating the emitted laser light of the lasers 200.
In one embodiment, the optical gas detection system 10 further includes a plurality of detectors 400, the plurality of detectors 400 are respectively installed behind the plurality of exit windows, and the plurality of detectors 400 are used for detecting the intensity of the absorbed laser beam to obtain the concentration of each component of the mixed gas.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. An optical gas detection system, comprising:
a plurality of lasers; and
an optical gas absorption cell is used for simultaneously detecting the concentration of each component in mixed gas;
the optical gas absorption cell includes:
an entrance mirror having a plurality of entrance windows for filtering wavelengths of the laser to obtain a monochromatic wave;
the emergent mirror is arranged in parallel relative to the incident mirror and is provided with a plurality of emergent windows which are in one-to-one correspondence with the incident windows;
the wavelengths of the light beams emitted by the emitting windows are different, the light beams are used for simultaneously detecting the concentration of each component in the mixed gas, and the wavelength of the laser is matched with each component to be detected in the mixed gas.
2. The optical gas detection system of claim 1 wherein the distance between the center of each of the entrance windows and the center of the entrance mirror is different.
3. The optical gas detection system of claim 2 wherein the plurality of entrance windows are uniformly distributed over the entrance mirror.
4. The optical gas detection system of claim 1 wherein the plurality of entrance windows includes a central entrance window having a center point that overlaps a center point of the entrance mirror.
5. The optical gas detection system of any one of claims 1-4 wherein the entrance mirror comprises a central entrance mirror segment and at least one lateral entrance mirror segment radially surrounding the central entrance mirror segment;
the exit mirror comprises a central exit mirror section and at least one lateral exit mirror section, the at least one lateral exit mirror section radially surrounds the central exit mirror section; and
the plurality of incidence windows comprise a central incidence window distributed on the central incidence mirror segment and at least one incidence side window distributed on the at least one side incidence mirror segment;
the plurality of exit windows comprise an exit central window distributed in the central exit mirror segment and at least one exit lateral window distributed in the at least one lateral exit mirror segment;
the circle center of the at least one lateral incident mirror segment is superposed with the circle center of the central incident mirror segment, and the circle center of the at least one lateral emergent mirror segment is superposed with the circle center of the central emergent mirror segment;
adjacent central incident mirror segments and at least one lateral incident mirror segment have different parameters;
the adjacent central exit mirror segment and the at least one lateral exit mirror segment have different parameters; and
the parameter is at least one of a radius or a focal length.
6. The optical gas detection system of claim 1, wherein the laser is a tunable laser.
7. The optical gas detection system of claim 1 wherein the position of the laser is set in accordance with the matched gas composition;
the laser matched with the gas component with low laser absorption concentration is arranged on the incident window far away from the center of the incident mirror, so that the corresponding gas absorption optical path is increased.
8. The optical gas detection system of claim 1, further comprising:
and the collimators are respectively positioned between the lasers and the incident windows and are used for collimating the emergent laser light of the lasers.
9. The optical gas detection system of claim 1, further comprising:
and the detectors are respectively arranged behind the exit windows and are used for detecting the intensity of the absorbed laser light so as to obtain the concentration of each component of the mixed gas.
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| CN110715909A (en) * | 2019-10-30 | 2020-01-21 | 山东大学 | Multi-channel multi-reflection gas detection device |
| CN110987813B (en) * | 2019-12-26 | 2022-10-21 | 深圳华领医学技术有限公司 | Combined type optical enhancement absorption cell |
| CN111157470A (en) * | 2020-01-06 | 2020-05-15 | 武汉米字能源科技有限公司 | Method for simultaneously measuring contents of multi-component gases on line by multiple lasers |
| CN111562237A (en) * | 2020-05-26 | 2020-08-21 | 中国科学院合肥物质科学研究院 | CO based on double-beam cavity enhanced spectroscopy technology2、N2O stable isotope simultaneous detection device and method |
| CN114166795A (en) * | 2021-11-16 | 2022-03-11 | 山西祎恒光电科技有限公司 | Multi-channel pool construction method shared by multi-wavelength lasers |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1736111A (en) * | 2002-11-07 | 2006-02-15 | 索尼德国有限责任公司 | Illumination arrangement for a projection system |
| CN1758051A (en) * | 2005-07-19 | 2006-04-12 | 中国科学院安徽光学精密机械研究所 | Undispersed infrared method multicomponent gas analyser based on gas filter correlation |
| CN101281125A (en) * | 2008-05-19 | 2008-10-08 | 安徽敏测光电科技有限公司 | Method and apparatus for monitoring intelligent infrared multi-component harmful gas |
| TW201135213A (en) * | 2010-03-25 | 2011-10-16 | Goodrich Corp | Multi-channel optical cell |
| CN103712932A (en) * | 2013-12-29 | 2014-04-09 | 西藏民族学院 | Multi-channel optical absorption detection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201009327D0 (en) * | 2010-06-03 | 2010-07-21 | Duvas Technologies Ltd | Optical absorption spectroscopy |
| CN102661918A (en) * | 2012-05-28 | 2012-09-12 | 中国科学院电工研究所 | Off-resonance photoacoustic spectrometric detection and analysis device |
| CN107727638B (en) * | 2017-11-02 | 2020-08-14 | 嘉兴镭光仪器科技有限公司 | Laser Raman spectrum gas analyzer with resonant cavity enhancement |
| CN207528621U (en) * | 2017-12-11 | 2018-06-22 | 国网重庆市电力公司电力科学研究院 | A kind of on-Line Monitor Device for the detection of electrical equipment HF gases |
-
2019
- 2019-01-16 CN CN201910039861.3A patent/CN109765184B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1736111A (en) * | 2002-11-07 | 2006-02-15 | 索尼德国有限责任公司 | Illumination arrangement for a projection system |
| CN1758051A (en) * | 2005-07-19 | 2006-04-12 | 中国科学院安徽光学精密机械研究所 | Undispersed infrared method multicomponent gas analyser based on gas filter correlation |
| CN101281125A (en) * | 2008-05-19 | 2008-10-08 | 安徽敏测光电科技有限公司 | Method and apparatus for monitoring intelligent infrared multi-component harmful gas |
| TW201135213A (en) * | 2010-03-25 | 2011-10-16 | Goodrich Corp | Multi-channel optical cell |
| CN103712932A (en) * | 2013-12-29 | 2014-04-09 | 西藏民族学院 | Multi-channel optical absorption detection device |
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