CN107167449A - A kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas - Google Patents
A kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas Download PDFInfo
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- CN107167449A CN107167449A CN201710389284.1A CN201710389284A CN107167449A CN 107167449 A CN107167449 A CN 107167449A CN 201710389284 A CN201710389284 A CN 201710389284A CN 107167449 A CN107167449 A CN 107167449A
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- G—PHYSICS
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- 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
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The present invention proposes a kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas, including：Supply gas retracting device；Laser cavity ring-down spectroscopy gas, which declines, swings chamber, and laser cavity ring-down spectroscopy gas, which declines, to be swung chamber and be connected with retracting device of supplying gas；Laser group and detector, laser group and detector relatively decline with laser cavity ring-down spectroscopy gas to be swung chamber and is connected；Physical parameter monitors chamber, and physical parameter monitoring chamber is connected with retracting device of supplying gas；Physical parameter sensor, physical parameter sensor is located at the physical parameter that physical parameter monitoring intracavitary is used to detect sulfur hexafluoride；Signal acquisition control module, the signal acquisition control module is connected with the laser group, the detector and physical parameter sensor respectively.The multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to embodiments of the present invention, with reference to the multi-parameter of laser cavity ring-down spectroscopy technology for detection sulfur hexafluoride decomposition gas, high accuracy, strong integration.
Description
Technical field
The present invention relates to trace gas multi-parameter detection field, particularly a kind of multi-parameter comprehensive of sulfur hexafluoride decomposition gas
Monitoring device.
Background technology
Currently for SF6The fault characteristic research of mixed gas has begun to progressively carry out, but is also in and uses analytical instrument
Laboratory research, for catabolite multi-parameter on-line monitoring technique research it is less.While SF6Catabolite is in insulated electro
Content is relatively low in gas, lacks a kind of high sensitivity, a variety of decomposition components concentration online measuring techniques of quick response.Profit of the invention
With the concentration of laser cavity ring-down spectroscopy technology for detection sulfur hexafluoride decomposition gas composition, with reference to temperature in decomposition gas, internal pressure and
Purity detecting, realizes quick, high accuracy, the comprehensive on-line monitoring of the multi-parameter of strong integration and early warning, is SF6Insulation electrical
Leakage, failure realize early warning and diagnosis.The closed cycle connected mode of gas circuit, can promote to reclaim the recycling of gas simultaneously,
Reduce SF6Discharge the environmental problem caused.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
Therefore, a kind of with reference to the lithium sulphur content of laser cavity ring-down spectroscopy technology for detection it is an object of the present invention to propose
Multi-parameter, high accuracy, the multi-parameter comprehensive monitoring device of the sulfur hexafluoride decomposition gas of strong integration vented one's spleen.
A kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to embodiments of the present invention, including：
Supply gas-retracting device；
Laser cavity ring-down spectroscopy gas, which declines, swings chamber, and the laser cavity ring-down spectroscopy gas, which declines, to be swung chamber and supply gas-reclaim with described
Device is connected, it is described supply gas-retracting device is used to decline to the laser cavity ring-down spectroscopy gas to swing chamber and convey and reclaim lithium
Sulphur is so that the laser cavity ring-down spectroscopy gas declines and swings the sulfur hexafluoride tolerance of intracavitary and at least keep dynamic equilibrium in monitoring；
Laser group and detector, the laser group and the detector relatively with the laser cavity ring-down spectroscopy gas
Body decline swing chamber be connected, wherein, the laser group be used for declined to the laser cavity ring-down spectroscopy gas swings chamber transmitting laser beam, institute
Stating detector is used to detect the laser cavity ring-down spectroscopy gas and decline to swing the ring-down spectroscopy of intracavitary generation；
Physical parameter monitors chamber, physical parameter monitoring chamber with it is described supply gas-retracting device is connected, described to supply gas-return
Receiving apparatus is used to convey to physical parameter monitoring chamber and reclaims sulfur hexafluoride so that the physical parameter monitors the six of intracavitary
Sulfur fluoride tolerance at least keeps dynamic equilibrium in monitoring；
Physical parameter sensor, the physical parameter sensor, which is located at the physical parameter monitoring intracavitary, to be used to detect hexafluoro
Change the physical parameter of sulphur；
Signal acquisition control module, the signal acquisition control module respectively with the laser group, the detector and
Physical parameter sensor is connected.
Advantageously, the multi-parameter comprehensive monitoring device of described sulfur hexafluoride decomposition gas is also described sharp including being relatively located at
Cavity ring-down spectroscopy gas, which declines, swings the first speculum and the second speculum of intracavitary, and first speculum is adjacent to the laser
Group, second speculum is adjacent to the detector.
Advantageously, the multi-parameter comprehensive monitoring device of described sulfur hexafluoride decomposition gas also includes laser driven module, institute
Laser driven module is stated to be located between the signal acquisition control module and the laser group to drive the laser group defeated
Go out the laser beam of multi-wavelength.
Advantageously, the laser driven module includes signal generating unit and laser drive unit, and the signal occurs single
Member is connected with the signal acquisition control module and the laser drive unit respectively, the laser drive unit and the laser
Device group is connected.
Advantageously, the centre wavelength of the laser beam of the laser group output is 1200nm~1600nm.
Advantageously, the laser group is semiconductor laser group.
Advantageously, the physical parameter sensor includes the SF being connected respectively with the signal acquisition control module6Purity
Sensor, pressure sensor and temperature sensor.
Advantageously, in addition to fault pre-alarming analysis module, the fault pre-alarming analysis module is controlled with the signal acquisition
Module is connected.
Advantageously, the laser cavity ring-down spectroscopy gas, which declines, swings chamber with the first import and first outlet, described to supply gas-return
Receiving apparatus is declined by first import to the laser cavity ring-down spectroscopy gas to be swung chamber conveying sulfur hexafluoride and described supply gas-return
Receiving apparatus is declined by the first outlet from the laser cavity ring-down spectroscopy gas swings chamber recovery sulfur hexafluoride.
Advantageously, physical parameter monitoring chamber has the second import and a second outlet, it is described supply gas-retracting device passes through
Second import to physical parameter monitoring chamber conveying sulfur hexafluoride and it is described supply gas-retracting device goes out by described second
Mouth reclaims sulfur hexafluoride from physical parameter monitoring chamber.
The advantage of the present invention compared with prior art is：
(1) a kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas of the invention, utilizes laser cavity ring-down spectroscopy gas
Physical examination survey technology, is improved in the relevant enhancing of intracavitary by gas and absorbs light path, can be achieved to the fast of sulfur hexafluoride decomposition gas composition
Speed, high-precision on-line checking.
(2) the multi-parameter comprehensive monitoring device of a kind of sulfur hexafluoride decomposition gas of the invention, with reference to laser cavity ring-down spectroscopy skill
Art detection sulfur hexafluoride decomposition gas (HF, H2S and CO) concentration, pressure, purity and temperature, realize many ginsengs of decomposition gas composition
Several, strong integration and high-sensitivity detection.
(3) the multi-parameter comprehensive monitoring device of a kind of sulfur hexafluoride decomposition gas of the invention, by believing a variety of detection parameters
Number analysis and assessment, failure is judged and early warning, safety guarantee is provided for power equipment operation maintenance personnel.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Fig. 1 is a kind of showing for the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to an embodiment of the invention
It is intended to.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings it is comprehensive a kind of multi-parameter of sulfur hexafluoride decomposition gas according to embodiments of the present invention is described in detail
Close monitoring device.
As shown in figure 1, a kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to embodiments of the present invention, bag
Include：Supply gas-retracting device 101, laser cavity ring-down spectroscopy gas, which declines, swings chamber 102, laser group 103, detector 104, physics ginseng
Number monitoring chamber 105, physical parameter sensor, signal acquisition control module 106.
Specifically, laser cavity ring-down spectroscopy gas decline swing chamber 102 and supply gas-retracting device 101 is connected, supply gas-reclaim
Device 101 swings chamber 102 for being declined to laser cavity ring-down spectroscopy gas and conveys and reclaim sulfur hexafluoride so that laser cavity ring-down spectroscopy
Gas, which declines, to be swung sulfur hexafluoride tolerance in chamber 102 and at least keeps dynamic equilibrium in monitoring.Advantageously, laser cavity ring-down spectroscopy gas
Body, which declines, swings chamber 102 with the first import 1021 and first outlet 1022, supply gas-retracting device 101 by the first import 1021 to
Laser cavity ring-down spectroscopy gas decline swing the conveying of chamber 102 sulfur hexafluoride and supply gas-retracting device 101 by first outlet 1022 from swashing
Cavity ring-down spectroscopy gas, which declines, swings the recovery sulfur hexafluoride of chamber 102.
Laser group 103 and detector 104 relatively decline with laser cavity ring-down spectroscopy gas to be swung chamber 102 and is connected, wherein, swash
Light device group 103, which is used to decline to laser cavity ring-down spectroscopy gas, swings the transmitting laser beam of chamber 102, and detector 104 is used for exploring laser light chamber
Ring-down spectroscopy gas, which declines, swings the ring-down spectroscopy of generation in chamber 102.
Physical parameter monitor chamber 105 and supply gas-retracting device 101 is connected, supply gas-retracting device 101 is to physics for joining
Number monitoring chamber 105 conveys and reclaims sulfur hexafluoride so that the sulfur hexafluoride tolerance in physical parameter monitoring chamber 105 is at least in monitoring
When keep dynamic equilibrium.Advantageously, physical parameter monitoring chamber 105 has the second import 1051 and second outlet 1052, supplies gas-returns
Receiving apparatus 101 by the second import 1051 to physical parameter monitor chamber 105 convey sulfur hexafluoride and supply gas-retracting device 101 leads to
Cross second outlet 1052 and reclaim sulfur hexafluoride from physical parameter monitoring chamber 105.
Physical parameter sensor is located at the physical parameter for being used to detect sulfur hexafluoride in physical parameter monitoring chamber 105.Favorably
Ground, the physical parameter sensor includes the SF being connected respectively with the signal acquisition control module6Purity sensor 1061, pressure
Force snesor 1062 and temperature sensor 1063.
Signal acquisition control module 107 is connected with laser group 103, detector 104 and physical parameter sensor respectively.
According to the example of the present invention, the multi-parameter comprehensive monitoring device of described sulfur hexafluoride decomposition gas also includes phase
It is located at laser cavity ring-down spectroscopy gas over the ground to decline the first speculum 1081 and the second speculum 1082 swung in chamber 102, first is anti-
Mirror 1081 is penetrated adjacent to laser group 103, the proximity detection device 104 of the second speculum 1082.
According to the example of the present invention, the multi-parameter comprehensive monitoring device of described sulfur hexafluoride decomposition gas also includes swashing
Optical drive module 109, laser driven module 109 is located between signal acquisition control module 107 and laser group 103 to be swashed with driving
Light device group 103 exports the laser beam of multi-wavelength.Advantageously, laser driven module 109 includes signal generating unit (not shown)
With laser drive unit (not shown), the signal generating unit drives with signal acquisition control module 107 and the laser respectively
Moving cell is connected, and the laser drive unit is connected with laser group 103.Advantageously, the laser beam that laser group 103 is exported
Centre wavelength is 1200nm~1600nm.Advantageously, the laser group is semiconductor laser group.
According to the example of the present invention, the multi-parameter comprehensive monitoring device of described sulfur hexafluoride decomposition gas also includes event
Hinder early warning analysis module 110, fault pre-alarming analysis module 110 is connected with signal acquisition control module 107.
In other words, supply gas-retracting device 101 and laser cavity ring-down spectroscopy gas declines and swings chamber 102 and physical parameter is monitored
Gas circuit connected mode between chamber 105 is annular enclosed connection, and plenum system is that circulation takes gas take-back model.Laser group 103
Three kinds of lasers can be included；Laser cavity ring-down spectroscopy gas, which declines to swing on chamber 102, the first import 1021 and first outlet 1022,
First import 1021 and first outlet 1022 decline positioned at laser cavity ring-down spectroscopy gas swings the top surface of chamber 102, and both sides are respectively mounted
First speculum 1081 and the second speculum 1082, laser cavity ring-down spectroscopy gas, which declines, to be swung in chamber 102 full of sulfur hexafluoride decomposition
Gas.Laser driven module 109 includes signal generating unit and laser drive unit.
Three kinds of lasers of laser group 103 export the laser beam of different wave length, and laser beam is inputted to laser by optical fiber
Cavity ring-down spectroscopy gas, which declines, swings chamber 102, and light declines in laser cavity ring-down spectroscopy gas and swung in chamber 102 through the first speculum 1081 and the
The multiple reflections of two-mirror 1082 are absorbed, and obtained ring-down spectroscopy is detected by detector 104, is converted into three road electric signals, should
Electric signal realizes acquisition process by signal acquisition control module 106；Synchronous signal acquisition control module 106 controls Laser Driven
Signal generating unit produces modulated signal, the modulated signal feeding Laser Driven of generation in module 109, laser driven module 109
Unit is used for modulating the laser output wavelength of various lasers.Laser drive unit controls the temperature and electric current of each laser,
For adjusting the output wavelength of various lasers.Thus, sulfur hexafluoride decomposition gas concentration signal is detected.
In addition, being located at the SF in physical parameter monitoring chamber 1056Purity sensor 1061, pressure sensor 1062 and temperature
Sensor 1063 is detected to the sulfur hexafluoride decomposition gas being filled in physical parameter monitoring chamber 105 respectively, obtains SF6It is pure
Degree, the parameter signal of pressure and temperature.
The sulfur hexafluoride decomposition gas concentration signal and SF of acquisition6Purity, the parameter signal of pressure and temperature are adopted by signal
Collection control module 107 is acquired processing, and the signal after processing carries out analysis calculating by fault pre-alarming analysis module 110, if
The concentration of decomposition gas exceedes predetermined value (such as when the concentration of three kinds decomposition gas reaches 0.5ppm), sends fault pre-alarming signal.
The laser beam centre wavelength that laser group is sent is respectively near 1.2 μm~1.6 μm.
The reflectivity of first speculum 1081 and the second speculum 1082 at 1.2 μm~1.6 μm of laser beam centre wavelength
Reach more than 99.996%.
Described SF6The detection range of purity detecting module 1061 is 0-100%, and resolution ratio is up to 0.1%；Pressure detecting
The detection range of module 1062 is 40-115KPa；The detection range of temperature detecting module 1063 is -30~+65 DEG C, precision 0.5
℃。
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more, unless separately
There is clearly specific limit.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is within the scope of the invention to above-mentioned implementation
Example is changed, changed, replacing and modification, each falls within protection scope of the present invention.
Claims (10)
1. a kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas, it is characterised in that including：
Supply gas-retracting device；
Laser cavity ring-down spectroscopy gas, which declines, swings chamber, and the laser cavity ring-down spectroscopy gas, which declines, swings chamber and the-retracting device of supplying gas
Be connected, it is described supply gas-retracting device be used for declined to the laser cavity ring-down spectroscopy gas swing chamber convey and reclaim sulfur hexafluoride with
Make the laser cavity ring-down spectroscopy gas decline to swing the sulfur hexafluoride tolerance of intracavitary and at least keep dynamic equilibrium in monitoring；
Laser group and detector, the laser group and the detector relatively decline with the laser cavity ring-down spectroscopy gas
Chamber is swung to be connected, wherein, the laser group, which is used to decline to the laser cavity ring-down spectroscopy gas, swings chamber transmitting laser beam, the spy
Surveying device is used to detect the laser cavity ring-down spectroscopy gas and decline to swing the ring-down spectroscopy of intracavitary generation；
Physical parameter monitors chamber, physical parameter monitoring chamber with it is described supply gas-retracting device is connected, the dress of supplying gas-reclaim
Put for being conveyed to physical parameter monitoring chamber and reclaiming sulfur hexafluoride so that the physical parameter monitors the lithium of intracavitary
Sulphur tolerance at least keeps dynamic equilibrium in monitoring；
Physical parameter sensor, the physical parameter sensor, which is located at the physical parameter monitoring intracavitary, to be used to detect sulfur hexafluoride
Physical parameter；
Signal acquisition control module, the signal acquisition control module respectively with the laser group, the detector and physics
Parameter sensors are connected.
2. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 1, it is characterised in that also include
Relatively it is located at the laser cavity ring-down spectroscopy gas and declines and swings the first speculum and the second speculum of intracavitary, first reflection
Mirror is adjacent to the laser group, and second speculum is adjacent to the detector.
3. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 1, it is characterised in that also include
Laser driven module, the laser driven module is located between the signal acquisition control module and the laser group to drive
The laser group exports the laser beam of multi-wavelength.
4. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 3, it is characterised in that described to swash
Optical drive module include signal generating unit and laser drive unit, the signal generating unit respectively with the signal acquisition control
Molding block is connected with the laser drive unit, and the laser drive unit is connected with the laser group.
5. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 3, it is characterised in that described to swash
The centre wavelength of the laser beam of light device group output is 1200nm~1600nm.
6. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 3, it is characterised in that described to swash
Light device group is semiconductor laser group.
7. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 1, it is characterised in that the thing
Reason parameter sensors include the SF being connected respectively with the signal acquisition control module6Purity sensor, pressure sensor and temperature
Spend sensor.
8. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 1, it is characterised in that also include
Fault pre-alarming analysis module, the fault pre-alarming analysis module is connected with the signal acquisition control module.
9. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 1, it is characterised in that described to swash
Cavity ring-down spectroscopy gas, which declines, swings chamber with the first import and first outlet, it is described supply gas-retracting device enters by described first
Mouth declined to the laser cavity ring-down spectroscopy gas swing chamber conveying sulfur hexafluoride and it is described supply gas-retracting device goes out by described first
Mouth declines from the laser cavity ring-down spectroscopy gas swings chamber recovery sulfur hexafluoride.
10. the multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas according to claim 1, it is characterised in that described
Physical parameter monitoring chamber has the second import and a second outlet, it is described supply gas-retracting device by second import to described
Physical parameter monitoring chamber conveying sulfur hexafluoride and it is described supply gas-retracting device supervised by the second outlet from the physical parameter
Survey chamber and reclaim sulfur hexafluoride.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710389284.1A CN107167449A (en) | 2017-05-27 | 2017-05-27 | A kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710389284.1A CN107167449A (en) | 2017-05-27 | 2017-05-27 | A kind of multi-parameter comprehensive monitoring device of sulfur hexafluoride decomposition gas |
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ID=59822230
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| CN108088707A (en) * | 2017-10-12 | 2018-05-29 | 国网重庆市电力公司电力科学研究院 | A kind of closed cycle gas on-line period retracting device for GIS device |
| CN109060719A (en) * | 2018-06-13 | 2018-12-21 | 北京航天控制仪器研究所 | A kind of detection of gas with multiple constituents device |
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Application publication date: 20170915 |