CN207816810U - The calibrating installation of Long path differential optical absorption spectroscopy air quality monitor - Google Patents
The calibrating installation of Long path differential optical absorption spectroscopy air quality monitor Download PDFInfo
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- CN207816810U CN207816810U CN201820279485.6U CN201820279485U CN207816810U CN 207816810 U CN207816810 U CN 207816810U CN 201820279485 U CN201820279485 U CN 201820279485U CN 207816810 U CN207816810 U CN 207816810U
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- absorbing cavity
- calibrating installation
- optical absorbing
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- 238000001658 differential optical absorption spectrophotometry Methods 0.000 title claims abstract description 22
- 238000009434 installation Methods 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 239000011521 glass Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 description 26
- 238000010521 absorption reaction Methods 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 description 2
- 238000002211 ultraviolet spectrum Methods 0.000 description 2
- 238000001429 visible spectrum Methods 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 238000004847 absorption spectroscopy Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001831 conversion spectrum Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000001285 laser absorption spectroscopy Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000611 venom Toxicity 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a kind of calibrating installation of Long path differential optical absorption spectroscopy air quality monitor, including cylindrical other optical absorbing cavity, an end face of the other optical absorbing cavity is equipped with air inlet, another end face is equipped with gas outlet；The end face diameter of the other optical absorbing cavity of the cylinder is 300~500mm, and pillar height is 100~300mm；The aperture of the air inlet is within 30mm；The aperture of the gas outlet is within 30mm；The other optical absorbing cavity is made of far ultraviolet quartz-like glass or ultraviolet quartz-like glass.The utility model can be detected and calibrate to the concentration parameter magnitude tracing index of Long path differential optical absorption spectroscopy air quality monitor under work condition state, improve accuracy and the stability of calibration.The utility model also have the characteristics that it is small, simple in structure, easy to operate, be easy to carry about with one.
Description
Technical field
The utility model is related to gauge check technologies, are to be related to a kind of Long path differential optical absorption spectroscopy air more specifically
The calibrating installation of quality monitor.
Background technology
In the measurement process to volatile organic trace compounds and venomous injurant in air, optics monitors skill on-line
Art is a kind of effective ways.Compared to traditional chemical method, optical method is because response is fast, safeguards simple and is widely used in environment
Monitoring.Optical method includes mainly Long path differential optical absorption spectroscopy method (Long Path Differential Optical at present
Absorption Spectroscopy, abbreviation LP-DOAS), infrared conversion spectrum technology (the Fourier transform of Fourier
Infrared spectroscopy, abbreviation FTIR) and tuning diode Laser absorption spectroscopy (Tunable diode laser
Absorption spectrometry, abbreviation TDLAS).
Wherein, LP-DOAS technologies have measuring speed is fast, precision is high, high resolution, measure wide waveband, stray light it is low with
And the features such as signal multiplexing, it is not only not required to sampling and the pretreatment of sample, but also nondestructive analysis may be implemented, thus
Can on-line automatic measurement be carried out to multiple gases pollutant simultaneously, it is qualitative or quantitative to be mainly used in industrial area characteristic contamination
Dynamic analysis, by home and abroad environment monitoring and scientific research field extensive use.But Long path differential optical absorption spectroscopy air quality is supervised
The runnability characteristic state uncertainty for surveying instrument is high, and there is an urgent need for often carry out magnitude tracing to it.
Currently, laboratory conditions are stayed in mostly for the calibration of Long path differential optical absorption spectroscopy air quality monitor, institute
The laboratory conditions of meaning refer to that instrument to be calibrated is disposed entirely in the absorption light pond full of calibrating gas, in this way, to be calibrated
The observation light path of instrument is completely in absorbing light pond.And the polluted gas in air is measured in real time in work condition state
When, the observation light path of Long path differential optical absorption spectroscopy air quality monitor be then exposed to by various ingredients (including particulate solid,
Gaseous pollutant and liquid droplet etc.) composition air in, environmental condition and laboratory conditions have bigger difference.And it tests
The absorption light pond of room is mostly long several meters, up to a hundred kilograms of the equipment of weighing is constituted, it is difficult to be carried under working condition and use.
Utility model content
In view of the deficiencies in the prior art, it is empty to be to provide a kind of Long path differential optical absorption spectroscopy for the purpose of this utility model
The calibrating installation of gas quality monitor.
In order to achieve the above objectives, the utility model adopts the following technical scheme：
A kind of calibrating installation of Long path differential optical absorption spectroscopy air quality monitor, including cylindrical other optical absorb
One end face of chamber, the other optical absorbing cavity is equipped with air inlet, another end face is equipped with gas outlet；
The end face diameter of the other optical absorbing cavity of the cylinder is 300~500mm, and pillar height is 100~300mm；
The aperture of the air inlet is within 30mm；
The aperture of the gas outlet is within 30mm；
The other optical absorbing cavity is made of far ultraviolet quartz-like glass or ultraviolet quartz-like glass.
The end face diameter of the other optical absorbing cavity of the cylinder and the ratio of pillar height are 7:3.
The air inlet is set to the top of corresponding end-faces with a gas port in the gas outlet, another gas port is then set to
The bottom of corresponding end-faces.
Also fixed handle on the side of the other optical absorbing cavity of the cylinder.
Further include horizontal stand, the horizontal stand is set to the lower section of the other optical absorbing cavity of the cylinder.
Compared with prior art, using a kind of school of Long path differential optical absorption spectroscopy air quality monitor of the utility model
Standard apparatus, can be under work condition state to the concentration parameter magnitude tracing index of Long path differential optical absorption spectroscopy air quality monitor
It is detected and calibrates, improve accuracy and the stability of calibration.The utility model also have it is small, simple in structure,
Easy to operate, the features such as being easy to carry about with one.
Description of the drawings
Fig. 1 is that a kind of principle of the calibrating installation of Long path differential optical absorption spectroscopy air quality monitor of the utility model is shown
It is intended to.
Specific implementation mode
The technical solution of the utility model is further illustrated with reference to the accompanying drawings and examples.
A kind of calibrating installation of Long path differential optical absorption spectroscopy air quality monitor shown in please referring to Fig.1, including cylinder
One end face of the other optical absorbing cavity 11 of shape, other optical absorbing cavity is equipped with air inlet 12, and aperture is within 30mm.
Another end face is equipped with gas outlet 13, and aperture is within 30mm.
The end face diameter of cylindrical other optical absorbing cavity is 300~500mm, and pillar height is 100~300mm.
The currently used optical region overwhelming majority of Long path differential optical absorption spectroscopy air quality monitor is ultraviolet (UV)
Wave band, therefore the material for constituting the quartz glass of other optical absorbing cavity must assure that ultraviolet band (the namely work of LP-DOAS
Make wave band) light beam passes through other optical absorbing cavity, and general glass material can then absorb the wave band, cause measurement error very big.
In the prior art, the silica composition in quartz glass should reach 99.99% or more, and hardness reaches Morse seven
Grade.According to the place optical region of calibration species, it is specifically chosen corresponding quartz glass class.Quartz glass can by its optical property
It is divided into three classes：
Far ultraviolet class JGS1:It is transparent within the scope of UV and visible spectra；Without absorption in 185~250nm wavelength bands
Band；There is strong absorption band in 2600~2800nm wavelength bands；Non-luminescent, light radiation is stablized.
Ultraviolet class JGS2:It is transparent within the scope of UV and visible spectra；Without absorption band in 200~250nm wavelength bands；
There is strong absorption band in 2600~2800nm wavelength bands；Non-luminescent, light radiation is stablized.
Infrared class JGS3:It is transparent in visible and infrared range of spectrum；Without apparent in 2600~2800nm wavelength bands
Absorption band.
JGS1 or JGS2 classes are used in this programme.
Meanwhile it is small with the cylinder-shaped body body structure surface tension that silica glass material makes, particulate matter is not easy by its surface
Absorption, and the attachment of particulate matter can influence to observe passing through for light path, cause the calculating error of instrument concentration, and then influence calibration knot
Fruit.Therefore, there is good repeatability and stability as agent structure using silica glass material in calibration.
It please see Figure again shown, coupled horizontal stand 14 be additionally provided with below the side of other optical absorbing cavity so that
The axis of other optical absorbing cavity can be kept in the horizontal direction.It should be noted that horizontal stand can also use monomer knot
Structure, as long as the side of other optical absorbing cavity to be placed on to the level that can keep chamber axis above when use.
An also fixed handle 15 being convenient for carrying on other optical absorbing cavity.
Through proving repeatedly, when the end face diameter of cylindrical other optical absorbing cavity and the ratio of pillar height are 7:When 3, gas
The mixing of the absorption gas of optical absorption intracavitary within a certain period of time is the most uniform.The other optical of the especially described cylinder is inhaled
The end face diameter for receiving chamber is 350mm, when pillar height is 150mm, operates science, conveniently the most, i.e. gas under working condition at the scene
Resident normal concentration gas can be stablized in optical absorption chamber in the shortest time, and intracavity gas is uniformly distributed, and is easy to simultaneously
It carries.
And by as shown in the figure it is found that when the longer gas being filled with of air line distance between air inlet and gas outlet is easier
It is full of entire cavity in a relatively short period of time.Therefore, the air inlet in figure is located at the bottom of end face, and gas outlet is located at the top of end face
Portion, vice versa.Preferably, the aperture of air inlet and gas outlet is 10mm.
In use, the calibrating gas with solution pressure valve and flow regulator is connected to air inlet 12 so that quantitative
The calibrating gas of concentration enters in other optical absorbing cavity 11, meanwhile, exhaust gas processing device is connected to gas outlet 13, prevents dirt
Contaminate surrounding air.After stability of flow, air inlet 12 and gas outlet 13 are closed so that sealed shape is presented in other optical absorbing cavity 11
State.And ensure arrow direction of the observation light path of Long path differential optical absorption spectroscopy air quality monitor to be calibrated in figure (i.e.
The axial direction of other optical absorbing cavity) horizontal pass through other optical absorbing cavity 11.So operate as required, it can be according in measurement Law
Relevant regulations treat the Long path differential optical absorption spectroscopy air quality monitor in school under work condition state accordingly by magnitude of tracing to the source
Index such as concentration parameter etc. is detected, and can also be facilitated and be calculated the concentration error of indication, concentration repeatability and stability of concentration
Etc. performance indicators.
After calibration, air pump is connected to air inlet 12.By purging, make residual in other optical absorbing cavity 11
It is discharged after staying gas to be passed through exhaust gas processing device.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate that this practicality is new
The purpose of type, and it is not used as the restriction to the utility model, as long as in the essential scope of the utility model, to the above
Variation, the modification of embodiment will all be fallen in the scope of the claims of the utility model.
Claims (7)
1. a kind of calibrating installation of Long path differential optical absorption spectroscopy air quality monitor, which is characterized in that
Including cylindrical other optical absorbing cavity, an end face of the other optical absorbing cavity is equipped with air inlet, another
A end face is equipped with gas outlet；
The end face diameter of the other optical absorbing cavity of the cylinder is 300~500mm, and pillar height is 100~300mm；
The aperture of the air inlet is within 30mm；
The aperture of the gas outlet is within 30mm；
The other optical absorbing cavity is made of far ultraviolet quartz-like glass or ultraviolet quartz-like glass.
2. calibrating installation according to claim 1, it is characterised in that：
The end face diameter of the other optical absorbing cavity of the cylinder and the ratio of pillar height are 7:3.
3. calibrating installation according to claim 1, it is characterised in that：
The end face diameter of the other optical absorbing cavity of the cylinder is 350mm, pillar height 150mm.
4. calibrating installation according to claim 1, it is characterised in that：
The aperture of the air inlet and the gas outlet is 10mm.
5. calibrating installation according to claim 1, it is characterised in that：
The air inlet is set to the top of corresponding end-faces with a gas port in the gas outlet, another gas port is then set to corresponding
The bottom of end face.
6. calibrating installation according to claim 1, it is characterised in that：
Also fixed a handle on the side of the other optical absorbing cavity of the cylinder.
7. calibrating installation according to claim 1, it is characterised in that：
Further include horizontal stand, the horizontal stand is set to the lower section of the other optical absorbing cavity of the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820279485.6U CN207816810U (en) | 2018-02-28 | 2018-02-28 | The calibrating installation of Long path differential optical absorption spectroscopy air quality monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820279485.6U CN207816810U (en) | 2018-02-28 | 2018-02-28 | The calibrating installation of Long path differential optical absorption spectroscopy air quality monitor |
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| Publication Number | Publication Date |
|---|---|
| CN207816810U true CN207816810U (en) | 2018-09-04 |
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| CN201820279485.6U Expired - Fee Related CN207816810U (en) | 2018-02-28 | 2018-02-28 | The calibrating installation of Long path differential optical absorption spectroscopy air quality monitor |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141694A (en) * | 2019-12-16 | 2020-05-12 | 交通运输部公路科学研究所 | Calibration device and method for tunnel carbon monoxide content detector based on infrared absorption method |
| CN111323544A (en) * | 2020-03-27 | 2020-06-23 | 沈阳沃尔鑫环保科技有限公司 | Calibration method and system based on miniature air quality monitoring instrument |
-
2018
- 2018-02-28 CN CN201820279485.6U patent/CN207816810U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141694A (en) * | 2019-12-16 | 2020-05-12 | 交通运输部公路科学研究所 | Calibration device and method for tunnel carbon monoxide content detector based on infrared absorption method |
| CN111323544A (en) * | 2020-03-27 | 2020-06-23 | 沈阳沃尔鑫环保科技有限公司 | Calibration method and system based on miniature air quality monitoring instrument |
| CN111323544B (en) * | 2020-03-27 | 2022-09-20 | 沈阳沃尔鑫环保科技有限公司 | Calibration method and system based on miniature air quality monitoring instrument |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |