CN106018314A - Multi-band multi-gas detection device and method - Google Patents
Multi-band multi-gas detection device and method Download PDFInfo
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- CN106018314A CN106018314A CN201610528903.6A CN201610528903A CN106018314A CN 106018314 A CN106018314 A CN 106018314A CN 201610528903 A CN201610528903 A CN 201610528903A CN 106018314 A CN106018314 A CN 106018314A
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- 238000001514 detection method Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 238000000862 absorption spectrum Methods 0.000 claims abstract description 6
- 238000004148 unit process Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 59
- 238000005259 measurement Methods 0.000 claims description 25
- 230000003287 optical effect Effects 0.000 claims description 19
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 8
- 238000004847 absorption spectroscopy Methods 0.000 claims description 6
- 229910052724 xenon Inorganic materials 0.000 claims description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical group [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 3
- 229910052805 deuterium Inorganic materials 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000001658 differential optical absorption spectrophotometry Methods 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000001285 laser absorption spectroscopy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
- G01N2021/396—Type of laser source
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
- G01N2201/06113—Coherent sources; lasers
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- Spectroscopy & Molecular Physics (AREA)
- Analytical Chemistry (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a multi-band multi-gas detection device and method. The method comprises the steps that 1, first measuring light and second measuring light are sent into a detection cell; 2, the first measuring light and the second measuring light which are sent into the detection cell are reflected back and forth among a second concave reflecting mirror, a first concave reflecting mirror and a third concave reflecting mirror, and selective absorption is conducted by gas to be detected; 3, a detector converts the first measuring light and the second measuring light which are sent out of the detection cell into a first electric signal and a second electric signal respectively and sends the first electric signal and the second electric signal to an analysis unit; 4, the analysis unit processes the first electric signal and the second electric signal respectively according to an absorption spectrum technique, and therefore the content of at least three types of gas in the gas to be detected is obtained respectively. The multi-band multi-gas detection device has the advantages of being simple in structure, low in cost and the like.
Description
Technical field
The present invention relates to gas detecting, particularly relate to the many gas-detecting devices of multiband and method.
Background technology
Along with surrounding air is caused seriously by the discharge of the acceleration of China's process of industrialization, harmful gas and flue dust
Polluting, human health, surrounding air gaseous contaminant (SO in air pollution serious threat2、NO2、O3、
CO) monitoring is the most very urgent.Traditional flue gas analysis ultraviolet difference absorption spectrum (DOAS) system can be same
Time detection SO2、NO2、O3Deng there being the gas of characteristic absorpting spectrum at ultraviolet band, but for characteristic absorption at
In the CO gas of infrared band, DOAS technology has had limitation, it is impossible to enough detect CO.CO detection is generally
Using tunable diode laser absorption spectroscopy (TDLAS) technology to realize, existing analyser mostly can not
Realize two kinds of technology and carry out gas detecting simultaneously, but need the instrument of more than two to realize multicomponent gas
Detection, cost is high and to monitor efficiency low.
Summary of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of simple in construction, low cost many
The many gas-detecting devices of wave band.
The goal of the invention of the present invention is achieved by the following technical programs:
A kind of many gas-detecting devices of multiband, described detection device includes detection cell；The many gas of described multiband
Detection device farther includes:
First light source, the wavelength of the first measurement light that described first light source sends covers at least one in gas to be measured
The absorption line of gas；Described first wavelength measuring light is in visible or infrared band；
Secondary light source, the wavelength of the second measurement light that described secondary light source sends covers in gas to be measured at least simultaneously
The absorption line of two kinds of gases；Described second wavelength measuring light is in ultraviolet band；
First concave mirror, described first concave mirror is arranged on the side in described detection cell；
Second concave mirror, described second concave mirror is oppositely disposed at described first concave mirror
Opposite side in described detection cell；
3rd concave mirror, described 3rd concave mirror is oppositely disposed at described first concave mirror
Opposite side in described detection cell；Described second concave mirror and the 3rd concave mirror are about described first recessed
The central axis of face reflecting mirror is symmetrical arranged, and described first concave mirror, the second concave mirror and the 3rd are recessed
The radius of curvature of the reflecting surface of face reflecting mirror is equal；Described second concave mirror and the 3rd concave mirror recessed
The focus in face is in the center of the concave surface of described first concave mirror；Described center is to the first concave mirror
The distance of focus is three times of described radius；
First detector, described first detector is interior and anti-at described second concave surface for injecting described detection cell
Penetrate roundtrip between mirror, the first concave mirror and the 3rd concave mirror by after GAS ABSORPTION to be measured
One measures light is converted to first signal of telecommunication, and is sent to analytic unit；
Light-splitting device, described light-splitting device will be in injecting described detection cell and at described 3rd concave reflection
Roundtrip by second after GAS ABSORPTION to be measured between mirror, the first concave mirror and the second concave mirror
Measurement light is spatially separated；
Second detector, separate for light-splitting device light is converted to second signal of telecommunication, and passes by described second detector
Deliver to analytic unit；
Analytic unit, described analytic unit is used for processing respectively described first signal of telecommunication according to absorption spectroscopy techniques,
Utilize second signal of telecommunication described in difference absorption spectrum technical finesse, thus obtain at least three kinds of gases in gas to be measured
Content.
According to above-mentioned many gas-detecting devices, it is preferable that described first light source and secondary light source are in described inspection
Survey outside pond relative to both sides.
According to above-mentioned many gas-detecting devices, it is preferable that described first light source is laser instrument, described second light
Source is xenon lamp or deuterium lamp.
According to above-mentioned many gas-detecting devices, alternatively, described many gas-detecting devices farther include:
At least two reflecting mirrors, described first measures light and/or second measures light through described at least two reflections
Inject after mirror or penetrate described detection cell.
According to above-mentioned many gas-detecting devices, it is preferable that described first light source and the first detector are in described
Outside detection cell relative to both sides.
According to above-mentioned many gas-detecting devices, it is preferable that described secondary light source and the second detector are in described
Outside detection cell relative to both sides.
According to above-mentioned many gas-detecting devices, alternatively, described many gas-detecting devices farther include:
First optical window, described first optical window is arranged on the wall of described detection cell, and described first measures
Light injects described detection cell through described first optical window obliquely；
Second optical window, described second optical window is arranged on the wall of described detection cell, by after absorbing
One measures light penetrates described detection cell through described second optical window obliquely.
The present invention also aims to provide a kind of many gas detection methods of multiband, namely the inspection of above-mentioned many gases
Surveying the method for work of device, described many gas detection methods comprise the following steps:
(A1) the first measurement light and the second measurement light are injected in detection cell；
(A2) the first measurement light of detection cell is entered to inject successively by the second concave mirror, the first concave mirror
Reflect with the 3rd concave mirror, and roundtrip between three concave mirrors, and selected by gas to be measured
Selecting property absorbs；
Enter to inject the second measurement light of detection cell successively by the 3rd concave mirror, the first concave mirror and second
Concave mirror reflects, and roundtrip between three concave mirrors, and is inhaled by gas-selectively to be measured
Receive；
(A3) detector measures light by penetrate described detection cell first, the second measurement light is respectively converted into first
The signal of telecommunication, second signal of telecommunication, and it is sent to analytic unit；
(A4) analytic unit processes described first signal of telecommunication, second signal of telecommunication respectively according to absorption spectroscopy techniques,
Thus obtain the content of at least three kinds of gases in gas to be measured respectively.
According to above-mentioned many gas detection methods, it is preferable that described at least three kinds of gases include: sulfur dioxide,
Nitrogen dioxide, carbon monoxide.
Compared with prior art, the method have the advantages that
1. the light path of three concave mirror compositions adds light path, it is possible to measure the gas of low concentration；
2. being combined with LASER Light Source by ultraviolet source and carry out gas analysis at a gas compartment, ultraviolet source is with sharp
Radiant lays respectively at the both sides of detection cell, and two-way light interlocks, and receiving terminal Position Design is alternating expression, it is to avoid light
Road is mutually blocked；
3. all there is certain angle with logical light window when detection cell is injected and penetrated to LASER Light Source, it is possible to effectively keep away
Exempt from interaction noise, improve certainty of measurement.
Accompanying drawing explanation
Referring to the drawings, the disclosure will be easier to understand.Skilled addressee readily understands that
: these accompanying drawings are used only for illustrating technical scheme, and are not intended to the present invention's
Protection domain is construed as limiting.In figure:
Fig. 1 is the flow chart of many gas detection methods of the embodiment of the present invention.
Detailed description of the invention
Fig. 1 and following description describe the optional embodiment of the present invention with teaching those skilled in the art how
Implement and reproduce the present invention.In order to instruct technical solution of the present invention, simplify or eliminated some conventional aspects.
Those skilled in the art should understand that be derived from these embodiments modification or replace will be in the scope of the present invention
In.Those skilled in the art should understand that following characteristics can combine to form the present invention in every way many
Individual modification.Thus, the invention is not limited in following optional embodiment, and only by claim and they
Equivalent limit.
Embodiment 1:
Multiband many gas gas detection device of the embodiment of the present invention, described multiband many gas-detecting devices bag
Include:
Detection cell, described detection cell has air inlet and gas outlet；
First light source, such as semiconductor laser with tunable, the wavelength of the first measurement light that described first light source sends
Cover the absorption line of at least one gas such as CO in gas to be measured；Described first wavelength measuring light is in can
See or infrared band；
Secondary light source, such as xenon lamp, deuterium lamp, the wavelength of the second measurement light that described secondary light source sends covers simultaneously
At least two kinds of gas such as SO in gas to be measured2、NO2、O3Absorption line；Described second wavelength measuring light
It is in ultraviolet band；
First concave mirror, described first concave mirror is arranged on the side in described detection cell；
Second concave mirror, described second concave mirror is oppositely disposed at described first concave mirror
Opposite side in described detection cell；
3rd concave mirror, described 3rd concave mirror is oppositely disposed at described first concave mirror
Opposite side in described detection cell；Described second concave mirror and the 3rd concave mirror are about described first recessed
The central axis of face reflecting mirror is symmetrical arranged, and described first concave mirror, the second concave mirror and the 3rd are recessed
The radius of curvature of the reflecting surface of face reflecting mirror is equal；Described second concave mirror and the 3rd concave mirror recessed
The focus in face is in the center of the concave surface of described first concave mirror；Described center is to the first concave mirror
The distance of focus is three times of described radius；
First detector, described first detector is interior and anti-at described second concave surface for injecting described detection cell
Penetrate roundtrip between mirror, the first concave mirror and the 3rd concave mirror by after GAS ABSORPTION to be measured
One measures light is converted to first signal of telecommunication, and is sent to analytic unit；
Light-splitting device, such as spectro-grating or Amici prism, described light-splitting device will be for injecting in described detection cell
And at described 3rd concave mirror, the quilt of roundtrip between the first concave mirror and the second concave mirror
The second measurement light after GAS ABSORPTION to be measured is spatially separated；
Second detector, such as line array CCD, linear array CMOS, light-splitting device is separated by described second detector
Light be converted to second signal of telecommunication, and be sent to analytic unit；
Analytic unit, described analytic unit is used for processing respectively described first signal of telecommunication according to absorption spectroscopy techniques,
Utilize second signal of telecommunication described in difference absorption spectrum technical finesse, thus obtain at least three kinds of gases in gas to be measured
Content.
In order to avoid first measures light and second and measure light and stop mutually in detection cell internal phase, further, described the
One light source be in secondary light source outside described detection cell relative to both sides.
In order to reduce the assembly difficulty of device, further, described many gas-detecting devices farther include:
At least two reflecting mirrors, described first measures light and/or second measures light through described at least two reflections
Inject after mirror or penetrate described detection cell.
In order to reduce optical noise to improve accuracy of detection, further, described many gas-detecting devices are further
Including:
First optical window, described first optical window is arranged on the wall of described detection cell, and described first measures
Light injects described detection cell through described first optical window obliquely；
Second optical window, described second optical window is arranged on the wall of described detection cell, by after absorbing
One measures light penetrates described detection cell through described second optical window obliquely.
Fig. 1 schematically illustrates the flow chart of the many gas detection methods of multiband of the embodiment of the present invention, namely
According to the method for work of above-mentioned many gas-detecting devices, as it is shown in figure 1, described many gas detection methods include
Following steps:
(A1) the first measurement light and the second measurement light are injected in detection cell；
(A2) the first measurement light of detection cell is entered to inject successively by the second concave mirror, the first concave mirror
Reflect with the 3rd concave mirror, and roundtrip between three concave mirrors, and selected by gas to be measured
Selecting property absorbs；
Enter to inject the second measurement light of detection cell successively by the 3rd concave mirror, the first concave mirror and second
Concave mirror reflects, and roundtrip between three concave mirrors, and is inhaled by gas-selectively to be measured
Receive；
(A3) detector measures light by penetrate described detection cell first, the second measurement light is respectively converted into first
The signal of telecommunication, second signal of telecommunication, and it is sent to analytic unit；
(A4) analytic unit processes described first signal of telecommunication, second signal of telecommunication respectively according to absorption spectroscopy techniques,
Thus obtain the content of at least three kinds of gases in gas to be measured respectively.
Embodiment 2:
According to embodiments of the present invention 1 many gas-detecting devices and the application examples of method.
In this application examples, the first light source uses semiconductor laser with tunable, the first wavelength measuring light to cover
The absorption line at infrared band of CO；Secondary light source uses xenon flash lamp, the second wavelength measuring light to cover
SO2、NO2、O3Absorption line；First light source be respectively at secondary light source outside described detection cell relative to
Both sides, on detection cell relative to both sides be respectively provided with first, second, third, fourth transparent window sheet, first
Measure light obliquely through after being reflected by a reflector after the first transparent window sheet successively by the second concave mirror, the
One concave mirror and the reflection of the 3rd concave mirror, and roundtrip between three concave mirrors, finally
It is reflected mirror reflection hypsokinesis and tiltedly passes the second transparent window sheet, received by the first detector；Second measures light wears
After being reflected by a reflector after crossing the 3rd transparent window sheet successively by the 3rd concave mirror, the first concave mirror and
Second concave mirror reflection, and roundtrip between three concave mirrors, after being finally reflected mirror reflection
Through the 4th transparent window sheet, by grating beam splitting；Described first light source and grating are in the same side of detection cell,
Secondary light source and the first detector are in the same side of detection cell；Analytic unit utilizes at laser absorption spectroscopy
Manage first signal of telecommunication of the first detector output, thus know the concentration of CO；Utilize difference absorption spectrum technology
Process second signal of telecommunication of the second detector output, thus know SO simultaneously2、NO2、O3Concentration.
Claims (9)
1. the many gas-detecting devices of multiband, described detection device includes detection cell；It is characterized in that:
The many gas-detecting devices of described multiband farther include:
First light source, the wavelength of the first measurement light that described first light source sends covers at least one in gas to be measured
The absorption line of gas；Described first wavelength measuring light is in visible or infrared band；
Secondary light source, the wavelength of the second measurement light that described secondary light source sends covers in gas to be measured at least simultaneously
The absorption line of two kinds of gases；Described second wavelength measuring light is in ultraviolet band；
First concave mirror, described first concave mirror is arranged on the side in described detection cell；
Second concave mirror, described second concave mirror is oppositely disposed at described first concave mirror
Opposite side in described detection cell；
3rd concave mirror, described 3rd concave mirror is oppositely disposed at described first concave mirror
Opposite side in described detection cell；Described second concave mirror and the 3rd concave mirror are about described first recessed
The central axis of face reflecting mirror is symmetrical arranged, and described first concave mirror, the second concave mirror and the 3rd are recessed
The radius of curvature of the reflecting surface of face reflecting mirror is equal；Described second concave mirror and the 3rd concave mirror recessed
The focus in face is in the center of the concave surface of described first concave mirror；Described center is to the first concave mirror
The distance of focus is three times of described radius；
First detector, described first detector is interior and anti-at described second concave surface for injecting described detection cell
Penetrate roundtrip between mirror, the first concave mirror and the 3rd concave mirror by after GAS ABSORPTION to be measured
One measures light is converted to first signal of telecommunication, and is sent to analytic unit；
Light-splitting device, described light-splitting device will be in injecting described detection cell and at described 3rd concave reflection
Roundtrip by second after GAS ABSORPTION to be measured between mirror, the first concave mirror and the second concave mirror
Measurement light is spatially separated；
Second detector, separate for light-splitting device light is converted to second signal of telecommunication, and passes by described second detector
Deliver to analytic unit；
Analytic unit, described analytic unit is used for processing respectively described first signal of telecommunication according to absorption spectroscopy techniques,
Utilize second signal of telecommunication described in difference absorption spectrum technical finesse, thus obtain at least three kinds of gases in gas to be measured
Content.
Many gas-detecting devices the most according to claim 1, it is characterised in that: described first light source and
Secondary light source be in outside described detection cell relative to both sides.
Many gas-detecting devices the most according to claim 2, it is characterised in that: described first light source is
Laser instrument, described secondary light source is xenon lamp or deuterium lamp.
Many gas-detecting devices the most according to claim 1, it is characterised in that: described many gas detecting
Device farther includes:
At least two reflecting mirrors, described first measures light and/or second measures light through described at least two reflections
Inject after mirror or penetrate described detection cell.
Many gas-detecting devices the most according to claim 1, it is characterised in that: described first light source and
First detector be in outside described detection cell relative to both sides.
Many gas-detecting devices the most according to claim 1, it is characterised in that: described secondary light source and
Second detector be in outside described detection cell relative to both sides.
Many gas-detecting devices the most according to claim 1, it is characterised in that: described many gas detecting
Device farther includes:
First optical window, described first optical window is arranged on the wall of described detection cell, and described first measures
Light injects described detection cell through described first optical window obliquely；
Second optical window, described second optical window is arranged on the wall of described detection cell, by after absorbing
One measures light penetrates described detection cell through described second optical window obliquely.
8. according to many gas detection methods of the arbitrary described many gas-detecting devices of claim 1-7, described
Many gas detection methods comprise the following steps:
(A1) the first measurement light and the second measurement light are injected in detection cell；
(A2) the first measurement light of detection cell is entered to inject successively by the second concave mirror, the first concave mirror
Reflect with the 3rd concave mirror, and roundtrip between three concave mirrors, and selected by gas to be measured
Selecting property absorbs；
Enter to inject the second measurement light of detection cell successively by the 3rd concave mirror, the first concave mirror and second
Concave mirror reflects, and roundtrip between three concave mirrors, and is inhaled by gas-selectively to be measured
Receive；
(A3) detector measures light by penetrate described detection cell first, the second measurement light is respectively converted into first
The signal of telecommunication, second signal of telecommunication, and it is sent to analytic unit；
(A4) analytic unit processes described first signal of telecommunication, second signal of telecommunication respectively according to absorption spectroscopy techniques,
Thus obtain the content of at least three kinds of gases in gas to be measured respectively.
Many gas detection methods the most according to claim 8, it is characterised in that: described at least three kinds of gas
Body includes: sulfur dioxide, nitrogen dioxide, carbon monoxide.
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| CN201610528903.6A CN106018314A (en) | 2016-06-30 | 2016-06-30 | Multi-band multi-gas detection device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643261A (en) * | 2017-09-25 | 2018-01-30 | 珠海广睿汇利发展有限公司 | A kind of monitor of long light path White pond DOAS methods measurement dusty gas concentration |
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| CN107643261A (en) * | 2017-09-25 | 2018-01-30 | 珠海广睿汇利发展有限公司 | A kind of monitor of long light path White pond DOAS methods measurement dusty gas concentration |
| CN108318427A (en) * | 2018-05-09 | 2018-07-24 | 杭州纳清光电科技有限公司 | Surrounding air detection device |
| CN108535191A (en) * | 2018-06-15 | 2018-09-14 | 上海理工大学 | LR laser raman gas-detecting device based on diamond shape hysteroscope |
| CN108898846A (en) * | 2018-07-23 | 2018-11-27 | 王丽燕 | A kind of road traffic group's mist early warning system and its method for early warning |
| CN109100317A (en) * | 2018-09-11 | 2018-12-28 | 杭州因诺维新科技有限公司 | Photo-electric gas monitoring system and method |
| CN109164057A (en) * | 2018-10-12 | 2019-01-08 | 北京环境特性研究所 | The infrared multi-spectral imaging remote sense monitoring system of chemical gas, device and method |
| CN110057760A (en) * | 2019-01-25 | 2019-07-26 | 北京航天计量测试技术研究所 | A kind of synthetic gas automatic testing method based on combination laser light source |
| CN109946232A (en) * | 2019-03-18 | 2019-06-28 | 安徽优思天成智能科技有限公司 | A kind of marine exhaust scan tracing monitoring system |
| CN114136884A (en) * | 2021-11-23 | 2022-03-04 | 杭州谱育科技发展有限公司 | Device and method for detecting radioactive elements |
| CN114136884B (en) * | 2021-11-23 | 2024-07-23 | 中国核电工程有限公司 | Device and method for detecting radioactive element |
| CN114324209A (en) * | 2021-12-29 | 2022-04-12 | 杭州谱育科技发展有限公司 | Fluid detection device and method based on absorption spectrum technology |
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