CN205786294U - The many gas-detecting devices of multiband - Google Patents
The many gas-detecting devices of multiband Download PDFInfo
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- CN205786294U CN205786294U CN201620715552.5U CN201620715552U CN205786294U CN 205786294 U CN205786294 U CN 205786294U CN 201620715552 U CN201620715552 U CN 201620715552U CN 205786294 U CN205786294 U CN 205786294U
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Abstract
The utility model discloses a kind of many gas-detecting devices of multiband, including: what the first light source, secondary light source sent measures the absorption line of light at least three kinds of gases of covering；First concave mirror is oppositely arranged with second, third concave mirror；Measure light to reflect between above-mentioned concave mirror, first measurement light of outgoing is received by the first detector, second measurement light of outgoing is received by the second detector after light splitting, and analytic unit processes the output signal of detector, thus knows the content of at least three kinds of gases.This utility model has simple in construction, low cost and other advantages.
Description
Technical field
This utility model relates to gas detecting, particularly relates to the many gas-detecting devices of multiband.
Background technology
Along with the discharge of the acceleration of China's process of industrialization, harmful gas and flue dust causes serious dirt to surrounding air
Dye, human health, surrounding air gaseous contaminant (SO in air pollution serious threat2、NO2、O3, CO) monitoring the most very urgent.
Traditional flue gas analysis ultraviolet difference absorption spectrum (DOAS) system can detect SO simultaneously2、NO2、O3Spy is had Deng at ultraviolet band
Levying the gas of absorption spectra, but characteristic absorption is in the CO gas of infrared band, DOAS technology has had limitation, it is impossible to enough
Detection CO.CO detection generally uses tunable diode laser absorption spectroscopy (TDLAS) technology to realize, and existing analyser is most
Two kinds of technology can not be realized and carry out gas detecting simultaneously, but need the instrument of more than two to realize the inspection of multicomponent gas
Surveying, cost is high and to monitor efficiency low.
Utility model content
In order to solve the deficiencies in the prior art, it is many that this utility model provides a kind of simple in construction, low cost
The many gas-detecting devices of wave band.
Utility model purpose of the present utility model is achieved by the following technical programs:
A kind of many gas-detecting devices of multiband, described detection device includes detection cell, analytic unit；Described multiband is many
Gas-detecting device farther includes:
First light source, the wavelength of the first measurement light that described first light source sends covers at least one gas in gas to be measured
Absorption line；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 two kinds simultaneously
The absorption line of gas；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 and described first concave mirror are oppositely disposed at described
Opposite side in detection cell；
3rd concave mirror, described 3rd concave mirror and described first concave mirror are oppositely disposed at described
Opposite side in detection cell；Described second concave mirror and the 3rd concave mirror are about in described first concave mirror
Mandrel line is symmetrical arranged, the song of the reflecting surface of described first concave mirror, the second concave mirror and the 3rd concave mirror
Rate radius is equal；The focus of the concave surface of described second concave mirror and the 3rd concave mirror is in described first concave reflection
The center of the concave surface of mirror；Described center to distance is described radius three times of the focus of the first concave mirror；
First detector, described first detector will be in injecting described detection cell and at described second concave reflection
Between mirror, the first concave mirror and the 3rd concave mirror, roundtrip is turned by the first measurement light after GAS ABSORPTION to be measured
It is changed to first signal of telecommunication, and is sent to analytic unit；
Light-splitting device, described light-splitting device for will inject in described detection cell and described 3rd concave mirror, the
Between one concave mirror and the second concave mirror, roundtrip is measured light in space by second after GAS ABSORPTION to be measured
The most separately；
Second detector, separate for light-splitting device light is converted to second signal of telecommunication, and is sent to by described second detector
Analytic unit.
According to above-mentioned many gas-detecting devices, it is preferable that described first light source and secondary light source are in described detection cell
Outward relative to both sides.
According to above-mentioned many gas-detecting devices, it is preferable that described first light source is laser instrument, and described secondary 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 after described at least two reflecting mirrors
Inject 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 detection
Outside pond 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 detection
Outside pond 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 inclines
Tiltedly inject described detection cell through described first optical window；
Second optical window, described second optical window is arranged on the wall of described detection cell, by the first survey after absorbing
Amount light penetrates described detection cell through described second optical window obliquely.
Compared with prior art, this utility model has 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. ultraviolet source is combined with LASER Light Source and carry out gas analysis, ultraviolet source and LASER Light Source at a gas compartment
Laying respectively at the both sides of detection cell, two-way light interlocks, and receiving terminal Position Design is alternating expression, it is to avoid light path 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 be prevented effectively from interference
Noise, improves certainty of measurement.
Accompanying drawing explanation
Referring to the drawings, disclosure of the present utility model will be easier to understand.Skilled addressee readily understands that
It is: these accompanying drawings are used only for illustrating the technical solution of the utility model, and are not intended to protection of the present utility model
Scope is construed as limiting.In figure:
Fig. 1 is the structure diagram of the many gas-detecting devices of multiband of this utility model embodiment.
Detailed description of the invention
Fig. 1 and how real following description describe optional embodiment of the present utility model with teaching those skilled in the art
Execute and reproduce this utility model.In order to instruct technical solutions of the utility model, simplify or eliminated some conventional aspects.Ability
Field technique personnel should be appreciated that be derived from these embodiments modification or replace will be in the range of this utility model.This area skill
Art personnel should be appreciated that following characteristics can combine to form multiple modification of the present utility model in every way.Thus, this reality
It is not limited to following optional embodiment with novel, and is only limited by claim and their equivalent.
Embodiment 1:
Fig. 1 schematically illustrates the structure diagram of the many gas-detecting devices of multiband of this utility model embodiment, as
Shown in Fig. 1, the many gas-detecting devices of described multiband 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 covers
The absorption line of at least one gas such as CO in gas to be measured；Described first wavelength measuring light is in visible 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 gas to be measured simultaneously
At least two kinds of gas such as SO in body2、NO2、O3Absorption line；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 and described first concave mirror are oppositely disposed at described
Opposite side in detection cell；
3rd concave mirror, described 3rd concave mirror and described first concave mirror are oppositely disposed at described
Opposite side in detection cell；Described second concave mirror and the 3rd concave mirror are about in described first concave mirror
Mandrel line is symmetrical arranged, the song of the reflecting surface of described first concave mirror, the second concave mirror and the 3rd concave mirror
Rate radius is equal；The focus of the concave surface of described second concave mirror and the 3rd concave mirror is in described first concave reflection
The center of the concave surface of mirror；Described center to distance is described radius three times of the focus of the first concave mirror；
First detector, described first detector will be in injecting described detection cell and at described second concave reflection
Between mirror, the first concave mirror and the 3rd concave mirror, roundtrip is turned by the first measurement light after GAS ABSORPTION to be measured
It is changed 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 in injecting described detection cell and
Described 3rd concave mirror, roundtrip by GAS ABSORPTION to be measured between the first concave mirror and the second concave mirror
After second measurement light spatially separated；
Second detector, such as line array CCD, linear array CMOS, separate for light-splitting device light is converted to by described second detector
Second signal of telecommunication, and it is sent to analytic unit；
Analytic unit, described analytic unit, for processing described first signal of telecommunication respectively according to absorption spectroscopy techniques, utilizes
Second signal of telecommunication described in difference absorption spectrum technical finesse, thus obtain the content of at least three kinds of gases in gas to be measured.Analyze
Unit is prior art, does not repeats them here.
Measure light in order to avoid first and the second measurement light stops mutually in detection cell internal phase, further, described first 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 after described at least two reflecting mirrors
Inject or penetrate described detection cell.
In order to reduce optical noise to improve accuracy of detection, further, 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 inclines
Tiltedly inject described detection cell through described first optical window；
Second optical window, described second optical window is arranged on the wall of described detection cell, by the first survey after absorbing
Amount light penetrates described detection cell through described second optical window obliquely.
Work process according to above-mentioned many gas-detecting devices is:
(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 and the 3rd
Concave mirror reflects, and roundtrip between three concave mirrors, and is absorbed by gas-selectively to be measured；
Enter to inject the second measurement light of detection cell successively by the 3rd concave mirror, the first concave mirror and the second concave surface
Reflecting mirror reflects, and roundtrip between three concave mirrors, and is absorbed by gas-selectively to be measured；
(A3) detector measures light by penetrate described detection cell first, the second measurement light is respectively converted into the first telecommunications
Number, second signal of telecommunication, and be sent to analytic unit；
(A4) analytic unit processes described first signal of telecommunication, second signal of telecommunication respectively according to absorption spectroscopy techniques, thus divides
Do not obtain the content of at least three kinds of gases in gas to be measured.
Embodiment 2:
The application examples of the many gas-detecting devices according to this utility model embodiment 1.
In this application examples, the first light source uses semiconductor laser with tunable, the first wavelength measuring light to cover CO's
Absorption line at infrared band；Secondary light source uses xenon flash lamp, the second wavelength measuring light to cover SO2、NO2、O3Absorption
Spectral 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 respectively
Having first, second, third, fourth transparent window sheet, first measures light is reflected obliquely after the first transparent window sheet
Reflected by the second concave mirror, the first concave mirror and the 3rd concave mirror successively after mirror reflection, and at three concave surfaces
Roundtrip between reflecting mirror, is finally reflected mirror reflection hypsokinesis and tiltedly passes the second transparent window sheet, connect by the first detector
Receive；Second measure light through after being reflected by a reflector after the 3rd transparent window sheet successively by the 3rd concave mirror, the first concave surface
Reflecting mirror and the reflection of the second concave mirror, 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
First detector is in the same side of detection cell；Analytic unit utilizes laser absorption spectroscopy to process the first detector output
First signal of telecommunication, thus know the concentration of CO；Utilize the second telecommunications that difference absorption spectrum technical finesse the second detector exports
Number, thus know SO simultaneously2、NO2、O3Concentration.
Claims (7)
1. the many gas-detecting devices of multiband, described detection device includes detection cell, analytic unit；It is characterized in that: institute
State the many gas-detecting devices of multiband to farther include:
First light source, the wavelength of the first measurement light that described first light source sends covers the suction of at least one gas in gas to be measured
Receive spectral line；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 at least two kinds of gases in gas to be measured simultaneously
Absorption line；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 and described first concave mirror are oppositely disposed at described detection
Opposite side in pond；
3rd concave mirror, described 3rd concave mirror and described first concave mirror are oppositely disposed at described detection
Opposite side in pond；Described second concave mirror and the 3rd concave mirror are about the central shaft of described first concave mirror
Line is symmetrical arranged, the curvature of the reflecting surface of described first concave mirror, the second concave mirror and the 3rd concave mirror half
Footpath is equal；The focus of the concave surface of described second concave mirror and the 3rd concave mirror is in described first concave mirror
The center of concave surface；Described center to distance is described radius three times of the focus of the first concave mirror；
First detector, described first detector for will inject in described detection cell and described second concave mirror, the
Between one concave mirror and the 3rd concave mirror, roundtrip is converted to by the first measurement light after GAS ABSORPTION to be measured
First signal of telecommunication, and it is sent to analytic unit；
Light-splitting device, described light-splitting device will be for injecting in described detection cell and at described 3rd concave mirror, first recessed
Between face reflecting mirror and the second concave mirror, roundtrip is spatially divided by the second measurement light after GAS ABSORPTION to be measured
Open；
Second detector, separate for light-splitting device light is converted to second signal of telecommunication, and is sent to analyze by described second detector
Unit.
Many gas-detecting devices the most according to claim 1, it is characterised in that: described first light source and secondary light source are 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 devices wrap further
Include:
At least two reflecting mirrors, described first measurement light and/or second is measured light and is injected after described at least two reflecting mirrors
Or penetrate described detection cell.
Many gas-detecting devices the most according to claim 1, it is characterised in that: at described first light source and the first detector
Outside described detection cell relative to both sides.
Many gas-detecting devices the most according to claim 1, it is characterised in that: at described secondary light source and the second detector
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 devices wrap further
Include:
First optical window, described first optical window is arranged on the wall of described detection cell, and described first measures light obliquely
Described detection cell is injected through described first optical window；
Second optical window, described second optical window is arranged on the wall of described detection cell, by the first measurement light after absorbing
Described detection cell is penetrated obliquely through described second optical window.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620715552.5U CN205786294U (en) | 2016-06-30 | 2016-06-30 | The many gas-detecting devices of multiband |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620715552.5U CN205786294U (en) | 2016-06-30 | 2016-06-30 | The many gas-detecting devices of multiband |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709867A (en) * | 2018-08-07 | 2018-10-26 | 杭州春来科技有限公司 | A kind of double spectrum detection devices |
| CN110553986A (en) * | 2019-08-26 | 2019-12-10 | 国网吉林省电力有限公司四平供电公司 | Multifunctional comprehensive analyzer for each component of decomposition product in SF6 gas |
| CN110715909A (en) * | 2019-10-30 | 2020-01-21 | 山东大学 | Multi-channel multi-reflection gas detection device |
-
2016
- 2016-06-30 CN CN201620715552.5U patent/CN205786294U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709867A (en) * | 2018-08-07 | 2018-10-26 | 杭州春来科技有限公司 | A kind of double spectrum detection devices |
| CN110553986A (en) * | 2019-08-26 | 2019-12-10 | 国网吉林省电力有限公司四平供电公司 | Multifunctional comprehensive analyzer for each component of decomposition product in SF6 gas |
| CN110715909A (en) * | 2019-10-30 | 2020-01-21 | 山东大学 | Multi-channel multi-reflection gas detection device |
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