CN109765184A - Optical gas absorbance pond and optical gas detection system - Google Patents
Optical gas absorbance pond and optical gas detection system Download PDFInfo
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- CN109765184A CN109765184A CN201910039861.3A CN201910039861A CN109765184A CN 109765184 A CN109765184 A CN 109765184A CN 201910039861 A CN201910039861 A CN 201910039861A CN 109765184 A CN109765184 A CN 109765184A
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Abstract
The present invention relates to field of gas detection, more particularly to a kind of optical gas absorbance pond and optical gas detection system.A kind of optical gas absorbance pond, comprising: incident mirror has multiple incident windows；Be emitted mirror, be arranged in parallel with the incident mirror, the outgoing mirror with the multiple incident window multiple exit windows correspondingly；Wherein, the wavelength of the light beam through each exit window outgoing is different, for carrying out Concentration Testing simultaneously to each ingredient in mixed gas.Above-mentioned optical gas absorbance pond and optical gas detection system, by the way that multiple incident windows are arranged on incident mirror, multiple exit windows are set correspondingly on outgoing mirror, and the wavelength of the laser of each exit window outgoing is different, to realize while detect the function of the concentration of each ingredient in mixed gas, and air consumption is small, reaction speed is fast.
Description
Technical field
The present invention relates to field of gas detection, more particularly to a kind of optical gas absorbance pond and optical gas detection system
System.
Background technique
Gas absorption cell has multiple realization method, wherein optical gas absorbance pond is usually that two panels reflecting optics are arranged, and is led to
Cross adjustment two panels reflecting optics so that detection luminous energy multiple reflections between two panels reflecting optics, and eventually by it is preset go out
Perforating site projects.
Generally, when carrying out gas multi measurement, using multiple one-component detection gas absorption cell tandems,
Gas passes sequentially through each gas absorption cell, and air consumption is big, and reaction speed is slow.
Summary of the invention
Based on this, a kind of optical gas absorbance pond and optical gas detection system are provided, gaseous mixture can be detected simultaneously
The concentration of each ingredient in body, air consumption is small, and reaction speed is fast.
A kind of optical gas absorbance pond, comprising:
Incident mirror has multiple incident windows；
It is emitted mirror, is arranged in parallel with the incident mirror, the outgoing mirror has to be corresponded with the multiple incident window
Multiple exit windows；
Wherein, the wavelength of the light beam through each exit window outgoing is different, for each ingredient in mixed gas
Concentration Testing is carried out simultaneously.
The distance between the center of each incident window and the center of the incident mirror are equal in one of the embodiments,
It is not identical.
The multiple incident window is uniformly distributed on the incident mirror in one of the embodiments,.
The multiple incident window includes center incident window in one of the embodiments, the center incident window
Central point it is Chong Die with the incident central point of mirror.
The incident mirror includes center incident mirror section and at least one lateral incident mirror section in one of the embodiments,
At least one described lateral incident mirror section is radially around the center incident mirror section；
The outgoing mirror includes that center is emitted mirror section and at least one lateral outgoing mirror section, at least one described lateral outgoing
Mirror section is emitted mirror section radially around the center；And
The multiple incident window includes being distributed in the center incident window of the center incident mirror section and being distributed in described
At least one incident lateral window of at least one lateral incident mirror section；
The multiple exit window includes being distributed in the outgoing center window of the center outgoing mirror section and being distributed in described
At least one of at least one lateral outgoing mirror section is emitted lateral window；
Wherein, the center of circle of at least one lateral incident mirror section is overlapped with the center of circle of the center incident mirror section, described
The center of circle of at least one lateral outgoing mirror section is overlapped with the center of circle of center outgoing mirror section；
The adjacent center incident mirror section and at least one lateral incident mirror section have different parameters；
The adjacent center outgoing mirror section and at least one lateral outgoing mirror section have different parameters；And
The parameter is at least one of radius or focal length.
At least one described lateral incident mirror section includes that the second incident mirror section and third are incident in one of the embodiments,
Mirror section, at least one described lateral outgoing mirror section includes that the second outgoing mirror section and third are emitted mirror section.
The optical gas absorbance pond in one of the embodiments, further include:
Air chamber, for accommodating the mixed gas；
Wherein, the incident mirror and the outgoing mirror are located at the both ends of the air chamber.
The air chamber includes at least one air inlet and at least one venthole in one of the embodiments,.
A kind of optical gas detection system, comprising:
Multiple lasers；And
Optical gas absorbance pond as described in any one of claim 1-5；
Wherein, each ingredient to be detected matches in the wavelength of the laser and mixed gas.
The laser is tunable laser in one of the embodiments,.
The position of the laser is according to the matched gas componant setting of institute in one of the embodiments,；
Wherein, the laser that the gas componant low with to laser absorption concentration matches is set to far from the incident mirror
The incident window of the heart increases so that corresponding gas absorbs light path.
The optical gas detection system in one of the embodiments, further include:
Multiple collimators, the multiple collimator be located at the multiple laser and the multiple incident window it
Between, for collimating the shoot laser of the laser.
The optical gas detection system in one of the embodiments, further include:
Multiple detectors, after the multiple detector is respectively arranged in the multiple exit window, the multiple detector
For detecting the intensity of the laser after absorbing, to obtain the concentration of each ingredient of the mixed gas.
Above-mentioned optical gas absorbance pond and optical gas detection system, by the way that multiple entrance windows are arranged on incident mirror
Mouthful, multiple exit windows are set correspondingly on outgoing mirror, and the wavelength of the laser of each exit window outgoing is different, from
And the function of the concentration of each ingredient in mixed gas being realized while detecting, and air consumption is small, reaction speed is fast.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of gas absorption cell in one embodiment；
Fig. 2 is the structural schematic diagram of incident mirror in one embodiment；
Fig. 3 is the structural schematic diagram that mirror is emitted in Fig. 2 embodiment；
Fig. 4 is the structural schematic diagram of optical gas detection system in one embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
A kind of optical gas absorbance pond 100, can be used for detecting the concentration of each ingredient in mixed gas, and the optical gas is inhaled
Receives pond 100 may include incident mirror 110 and outgoing mirror 120, wherein the incidence mirror 110 has multiple incident windows, the outgoing
Mirror 120 is arranged in parallel relative to the incident mirror 110, and the outgoing mirror 120 has to be corresponded with the multiple incident window
Multiple exit windows.
Fig. 1 is the structural schematic diagram of gas absorption cell in one embodiment, as shown in Figure 1, the multiple incident window can
Including the first incident window 111, the second incident window 112 and third incident window 113, correspondingly, the multiple exit window
Mouth may include the first exit window 121, the second exit window 122 and third exit window 123.
The wavelength of the first light beam in one of the embodiments, through the outgoing of the first exit window 121 is λ1, go out through second
The wavelength for penetrating the second light beam of the outgoing of window 122 is λ2, the wavelength for the third light beam being emitted through third exit window 123 is λ3, and
And meet λ1≠λ2≠λ3.First light beam, the second light beam, third light beam are respectively used to three kinds of differences in measurement mixed gas
The concentration of ingredient.
It specifically, is respectively λ to obtain wavelength1、λ2、λ3The first light beam, the second light beam and third light beam, can be
It is λ that one incident window 111, the second incident window 112 and third incident window 113, which distinguish incident wavelength,1、λ2、λ3Light beam,
It can also be incident comprising λ respectively in the first incident window 111, the second incident window 112 and third incident window 1131、λ2、λ3
The mixed light of light beam, and filtered respectively through the first incident window 111, the second incident window 112, third incident window 113, to obtain
Obtaining wavelength is respectively λ1、λ2、λ3Monochromatic wave.
First incident window 111, second incident window 112, third incident window 113 in one of the embodiments,
The distance at center to 110 center of incident mirror is respectively R1、R2、R3, and meet R1≠R2≠R3, i.e., the center of the described incident mirror 110
Distance to the center of each incident window is all different.Specifically, the first incident window 111 may be provided at away from incident mirror
110 centre distances are R1Annulus on any point, the second incident window 112 may be provided at away from incident 110 centre distance of mirror be R2
Annulus on any point, third incident window 113 may be provided at away from incident 110 centre distance of mirror be R3Annulus on it is any one
Point.
First incident window 111, the second incident window 112,113 edge of third incident window in one of the embodiments,
The radially uniform distribution of the incidence mirror 110, that is, meet R1-R2=R2-R3.Being uniformly distributed for each incident window reduces each light
Interference between beam.
The center of third incident window 113 is located on the center of the incident mirror 110 in one of the embodiments, i.e.,
Meeting the multiple incident window includes the incident window that a center is located at 110 center of the incident mirror.
It should be noted that above-mentioned first incident window 111, the second incident window 112, third incident window 113 are uniform
Arrangement and an incident window center are located at the arrangement mode at 110 center of the incident mirror, it is therefore intended that reduce as far as possible each
Interference between light beam, and accommodate greater number of light beam as far as possible, with can be used to detect greater number of mixed gas at
The concentration divided.When the constituent of mixed gas is simple, the arrangement of each incident window may not necessarily require to be uniformly distributed,
Incident mirror center is not needed to be located at yet.
The incident mirror includes center incident mirror section and at least one lateral incident mirror section in one of the embodiments,
At least one described lateral incident mirror section is radially around the center incident mirror section；
The outgoing mirror includes that center is emitted mirror section and at least one lateral outgoing mirror section, at least one described lateral outgoing
Mirror section is emitted mirror section radially around the center；And
The multiple incident window includes being distributed in the incident center window of the center incident mirror section and being distributed in described
At least one incident lateral window of at least one lateral incident mirror section；
The multiple exit window includes being distributed in the outgoing center window of the center outgoing mirror section and being distributed in described
At least one of at least one lateral outgoing mirror section is emitted lateral window；
Wherein, the adjacent center incident mirror section and at least one lateral incident mirror section have different radius or coke
Away from；And
The adjacent center outgoing mirror section and at least one lateral outgoing mirror section have different radius or focal length.
At least one described lateral incident mirror section includes that the second incident mirror section and third are incident in one of the embodiments,
Mirror section, at least one described lateral outgoing mirror section includes that the second outgoing mirror section and third are emitted mirror section.
Specifically, first light beam roundtrip propagation between the described first incident mirror section and the first outgoing mirror section is inhaled
It receives, to measure the concentration of the first composition of the mixed gas；Second light beam is in the described second incident mirror section and described the
Roundtrip propagation absorbs between two outgoing mirror sections, to measure the concentration of the second composition of the mixed gas；The third light beam exists
Roundtrip propagation absorbs between the third reflecting mirror section and third outgoing mirror section, with measure the third of the mixed gas at
The concentration divided.
The optical gas absorbance pond 100 in one of the embodiments, further include:
Air chamber, for accommodating the mixed gas；
Wherein, the incident mirror and the outgoing mirror are located at the both ends of the air chamber.
The air chamber includes at least one air inlet and at least one venthole in one of the embodiments,.
Below with reference to specific application, optical gas absorbance pond in the application is described in detail:
Fig. 2 is the structural schematic diagram of incident mirror in one embodiment, and Fig. 3 is the structural representation that mirror is emitted in Fig. 2 embodiment
Figure.As shown in Fig. 2, there are three incident window A1, C1, E1 for incident mirror tool, wherein the center E1 is located on the center of incident mirror, and full
Sufficient A1, C1, E1 are on same straight line；Correspondingly, as described in Figure 3, there are three exit window B1, D8, F1 for outgoing mirror tool.It needs
Illustrate, any one place on the circle of the incident mirror centre distance R1 of distance can be set in A1, and C1 can be set to be entered in distance
Penetrate any one place on the circle of mirror centre distance R2.In measurement process, the first incident beam enters optics gas from A1 incident window
Body absorption cell, the B1 point being transmitted on outgoing mirror, then through the A2 point on B1 point reflection to incident mirror, by A2 point reflection to being emitted mirror
On B2 point, successively incident mirror and outgoing mirror between Circulated reflection, finally from outgoing mirror B12 point outgoing；Second incident light
Beam enters optical gas absorbance pond from C1 incident window, the D1 point being transmitted on outgoing mirror, then through on D1 point reflection to incident mirror
C2 point, by C2 point reflection to outgoing mirror on D2 point, successively incident mirror and outgoing mirror between Circulated reflection, finally from outgoing
The D8 point of mirror is emitted；Third incident beam enters optical gas absorbance pond from E1 incident window, the F1 being transmitted on outgoing mirror, and
It is emitted from F1 point.
The application also provides a kind of optical gas detection system 10, and Fig. 4 is optical gas detection system in one embodiment
Structural schematic diagram, as shown in figure 4, the optical gas detection system 10 is used to detect the concentration of each ingredient in mixed gas,
The optical gas detection system 10 may include multiple lasers 200, and the optics gas as provided in above-mentioned any embodiment
Body absorption cell 100, wherein the multiple laser 200 can generate the light beam of multiple single wavelengths, the multiple laser respectively
200 wavelength can be selected according to the ingredient of the mixed gas.It should be noted that the quantity of the laser is according to needs
The composition quantity of the mixed gas of measurement determines, when mixed gas to be measured ingredient to be measured be it is N number of, then in requisition for setting
Number of lasers is N number of.
The multiple laser 200 can be tunable laser in one of the embodiments,.The tunable laser
Laser output wavelength can continuously be changed in a certain range.
The multiple laser 200 can be arranged according to corresponding gas componant in one of the embodiments, wherein
It is set to the incident window far from incident mirror center with to the corresponding laser of the low gas componant of laser absorption concentration, so that
Corresponding gas absorbs light path and increases.Specifically, detection accuracy and the gas pair of the optical gas detection system 10 to each gas
The absorption intensity of corresponding light beam is directly proportional with light path is absorbed, to guarantee detection of the optical gas detection system 10 to each ingredient
Precision is as close as the high gas componant of settable absorption intensity is incident from the incident window close to incident mirror center, i.e.,
Reduce its and absorb light path, and the gas componant weak to absorption intensity can be incident from the incident window far from incident mirror, that is, increase it
Absorb light path.
The optical gas detection system 10 further includes multiple collimators 300 in one of the embodiments, the multiple
Collimator 300 is located between the multiple laser 200 and the multiple incident window, for collimating the laser
200 shoot laser.
The optical gas detection system 10 further includes multiple detectors 400 in one of the embodiments, the multiple
After detector 400 is respectively arranged in the multiple exit window, the multiple detector 400 is used to detect the laser beam after absorbing
Intensity, to obtain the concentration of each ingredient of the mixed gas.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of optical gas absorbance pond characterized by comprising
Incident mirror has multiple incident windows；
It is emitted mirror, is arranged in parallel with the incident mirror, the outgoing mirror has more correspondingly with the multiple incident window
A exit window；
Wherein, the wavelength of the light beam through each exit window outgoing is different, for each ingredient in mixed gas simultaneously
Carry out Concentration Testing.
2. optical gas absorbance pond according to claim 1, which is characterized in that the center of each incident window with it is described
The distance between the center of incident mirror is all different.
3. optical gas absorbance pond according to claim 2, which is characterized in that the multiple incident window is uniformly distributed in
On the incidence mirror.
4. optical gas absorbance pond according to claim 1, which is characterized in that the multiple incident window includes that center enters
Window is penetrated, the central point of the center incident window is Chong Die with the incident central point of mirror.
5. optical gas absorbance pond described in any one of -4 according to claim 1, which is characterized in that it is described incidence mirror include
Center incident mirror section and at least one lateral incident mirror section, at least one described lateral incident mirror section enter radially around the center
Penetrate mirror section；
The outgoing mirror includes center outgoing mirror section and at least one lateral outgoing mirror section, at least one described lateral outgoing mirror section
Mirror section is emitted radially around the center；And
The multiple incident window include be distributed in the center incident window of the center incident mirror section and be distributed in it is described at least
At least one incident lateral window of one lateral incident mirror section；
The multiple exit window include be distributed in the outgoing center window of center outgoing mirror section and be distributed in it is described at least
At least one of one lateral outgoing mirror section is emitted lateral window；
Wherein, the center of circle of at least one lateral incident mirror section is overlapped with the center of circle of the center incident mirror section, it is described at least
The center of circle of one lateral outgoing mirror section is overlapped with the center of circle of center outgoing mirror section；
The adjacent center incident mirror section and at least one lateral incident mirror section have different parameters；
The adjacent center outgoing mirror section and at least one lateral outgoing mirror section have different parameters；And
The parameter is at least one of radius or focal length.
6. a kind of optical gas detection system characterized by comprising
Multiple lasers；And
Optical gas absorbance pond as described in any one of claim 1-5；
Wherein, each ingredient to be detected matches in the wavelength of the laser and mixed gas.
7. optical gas detection system according to claim 6, which is characterized in that the laser is tunable laser
Device.
8. optical gas detection system according to claim 6, which is characterized in that the position of the laser is according to institute
The gas componant setting matched；
Wherein, the laser that the gas componant low with to laser absorption concentration matches is set to far from the incident mirror center
Incident window increases so that corresponding gas absorbs light path.
9. optical gas detection system according to claim 6, which is characterized in that further include:
Multiple collimators, the multiple collimator are located between the multiple laser and the multiple incident window, are used
In the shoot laser for collimating the laser.
10. optical gas detection system according to claim 6, which is characterized in that further include:
Multiple detectors, after the multiple detector is respectively arranged in the multiple exit window, the multiple detector is used for
The intensity of laser after detection absorption, to obtain the concentration of each ingredient 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 |
| CN110987813A (en) * | 2019-12-26 | 2020-04-10 | 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 |
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| CN109765184B (en) | 2022-06-07 |
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