CN110160990A - Trace gas and its isotope real time on-line detection device - Google Patents
Trace gas and its isotope real time on-line detection device Download PDFInfo
- Publication number
- CN110160990A CN110160990A CN201910460342.4A CN201910460342A CN110160990A CN 110160990 A CN110160990 A CN 110160990A CN 201910460342 A CN201910460342 A CN 201910460342A CN 110160990 A CN110160990 A CN 110160990A
- Authority
- CN
- China
- Prior art keywords
- gas
- light
- laser
- signal
- photodetector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000010521 absorption reaction Methods 0.000 claims abstract description 59
- 230000003287 optical effect Effects 0.000 claims abstract description 47
- 239000013307 optical fiber Substances 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 18
- 241000931526 Acer campestre Species 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims description 18
- 239000004809 Teflon Substances 0.000 claims description 12
- 229920006362 Teflon® Polymers 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 4
- 238000007405 data analysis Methods 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 134
- 238000001816 cooling Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000661 Mercury cadmium telluride Inorganic materials 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- YBNMDCCMCLUHBL-UHFFFAOYSA-N (2,5-dioxopyrrolidin-1-yl) 4-pyren-1-ylbutanoate Chemical compound C=1C=C(C2=C34)C=CC3=CC=CC4=CC=C2C=1CCCC(=O)ON1C(=O)CCC1=O YBNMDCCMCLUHBL-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000001285 laser absorption spectroscopy Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000005436 troposphere Substances 0.000 description 1
Classifications
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
-
- 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
- G01N21/11—Filling or emptying of cuvettes
-
- 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
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
-
- 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
-
- 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
-
- 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
-
- 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
- G01N2021/0162—Arrangements or apparatus for facilitating the optical investigation using microprocessors for control of a sequence of operations, e.g. test, powering, switching, processing
-
- 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
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
- G01N2021/151—Gas blown
-
- 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
- G01N2021/3129—Determining multicomponents by multiwavelength light
- G01N2021/3133—Determining multicomponents by multiwavelength light with selection of wavelengths before the sample
-
- 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
-
- 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
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/126—Microprocessor processing
Landscapes
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of trace gas and its isotope real time on-line detection devices, it is characterized by comprising optical path measurement part, air path part, control and signal processings, and wherein optical path measurement portion point includes laser, beam splitter, the first collimating optical fibre head, the second collimating optical fibre head, light gas absorption cell, the first photodetector, the second photodetector；Air path part includes air inlet gas circuit and outlet gas circuit；Control and signal processing include host computer, lock-in amplifier, difference amplifier, preamplifier, optical maser wavelength locking module, signal generator, current controller, temperature controller.The present invention can be achieved to detect the real-time online of trace gas and its isotope, can be realized laser stabilization output, and reduce interference of the external environment to laser.
Description
Technical field
The present invention relates to trace gas optical detection apparatus field, specifically a kind of trace gas and its isotope exist in real time
Line detector.
Background technique
Nitrogen, oxygen, argon, carbon dioxide account for the 99.997% of dry air in atmosphere, other gases only account for 0.003%, their contents
Seldom, CO, N2O, SO2, O3, NO, NO2 such as in atmosphere, CH4, NH3, H2S, halide, organic compound, these are in sky
The less gas of content belongs to trace gas in gas.Trace gas by various physics, chemistry, biology, earth process work
With and participate in biogeochemical circulation, significant impact is caused to global atmosphere environment and ecology.Such as photochemical fog,
Acid rain, greenhouse effects, depletion of the ozone layer etc..
A kind of atom that isotope refers to that atomic nucleus endoplasm subnumber is identical and neutron population is different is called isotope.Isotope is real-time
On-line measurement has important research significance in fields such as geochemistry, paleontology, atmospheric physics chemistry, biomedicines.It surveys
The content of Indium isotopes can effectively identify and analyze the source of isotope species.Such as to photosynthesis of plant, biology
Metabolism, tracking, troposphere chemical process, the stratospheric ozone chemical process of global carbon emission etc. are studied.Equally, isotope
It can also be used for the tracking to trace gas source.Therefore a kind of trace gas and its isotope of capable of quick and precisely detecting is needed
Device.
Summary of the invention
The object of the present invention is to provide a kind of trace gas and its isotope real time on-line detection devices, to realize to trace
The on-line checking of gas and its isotope.
In order to achieve the above object, the technical scheme adopted by the invention is as follows:
Trace gas and its isotope real time on-line detection device, it is characterised in that: including optical path measurement part, air path part,
Control and signal processing, in which:
Optical path measurement portion point including laser, beam splitter, the first collimating optical fibre head, the second collimating optical fibre head, light gas absorption cell,
First photodetector, the second photodetector, the entering light for going out light end and connecting beam splitter by optical fiber optics of the laser
End, the first collimating optical fibre head, the second collimating optical fibre head pass through respectively optical fiber optics connection beam splitter it is different go out light end, described the
One photodetector is set to the emitting light path of the first collimating optical fibre head, and the light inlet of the gas absorption cell is set to the second collimated light
The emitting light path of fine head, second photodetector are set to the light-emitting window of gas absorption cell；
Air path part includes air inlet gas circuit and outlet gas circuit, and sample gas under study is accessed in air inlet gas circuit one end, the other end accesses institute
The air inlet of gas absorption cell is stated, outlet optical path accesses the gas outlet of gas absorption cell；
Control and signal processing include host computer, lock-in amplifier, difference amplifier, preamplifier, optical maser wavelength lock
Cover half block, signal generator, current controller, temperature controller, wherein signal generator output respectively with current controller, lock
The input of phase amplifier is electrically connected, and the output of current controller, temperature controller is electrically connected with the laser respectively；Described
One photodetector, the second photodetector are electrically connected with the input of preamplifier respectively, the output of preamplifier and poor
The input electrical connection of point amplifier, the output of difference amplifier are electrically connected with the input of lock-in amplifier, lock-in amplifier it is defeated
It is electrically connected out with the input of host computer, the output of host computer is electrically connected with the input of optical maser wavelength locking module, optical maser wavelength lock
The output of cover half block is electrically connected with the input of current controller；
In air path part, sample gas under study enters gas absorption cell by air inlet gas circuit, the letter in control and signal processing
Number generator loads preset modulating frequency information to current controller, and current controller is based on modulating frequency information to laser
The driving current of respective frequencies is exported, to drive laser works to generate the emergent light of corresponding wavelength；
The emergent light of laser is divided into two-way light beam through beam splitter, wherein light beam is as reference light, another way light beam conduct all the way
Light is measured, reference light reenters after the first collimating optical fibre head collimation and is incident upon the first photodetector, measures light through the second collimated light
Enter gas absorption cell after fine head collimation, is finally gone out after multiple reflections in the gas absorption cell for being filled with sample gas under study
It is incident upon the second photodetector；
Received optical signal is respectively converted into after electric signal by the first photodetector, the second photodetector is sent into preposition amplification
Device is sent into difference amplifier after preamplifier amplifies, and eliminates the noise generated due to laser shake through difference amplifier
After be sent into lock-in amplifier, lock-in amplifier is demodulated according to the corresponding electric signal of reference light electric signal corresponding with measurement light
The harmonic signal of information is absorbed comprising under test gas, harmonic signal is sent into host computer by lock-in amplifier；
Host computer carries out data analysis after harmonic signal is converted to data, is missed with calculating under test gas information data and feedback
Poor information data；Host computer is sent into optical maser wavelength locking mould after feedback error information data is converted to feedback error signal simultaneously
Block, optical maser wavelength locking module will be loaded onto current controller after feedback error signal converted voltage, current controller will be electric
Pressure, which is converted to, to be superimposed to current controller after electric current and exports to the driving current of laser, is realized to laser output light wavelength
Feedback control.
The trace gas and its isotope real time on-line detection device, it is characterised in that: optical path measures in part, swashs
Light device carries automatically controlled temperature-adjusting device, and the output of current controller and the current input terminal of laser connect, temperature controller
The automatically controlled temperature-adjusting device that carries of output and laser connect.
The trace gas and its isotope real time on-line detection device, it is characterised in that: optical path measures in part, point
The beam splitting ratio of beam device is 1:99, wherein 1% light beam enters the first collimating optical fibre head as reference light, 99% light beam is as survey
It measures light and enters the second collimating optical fibre head.
The trace gas and its isotope real time on-line detection device, it is characterised in that: optical path measures in part, root
The laser that wave band is corresponded to according to the wave band type selecting of under test gas determines the first photodetector, further according to the type selecting of laser
Two photodetector type selectings.
The trace gas and its isotope real time on-line detection device, it is characterised in that: in air path part, air inlet gas
Road includes injection port fast joint, drying tube, early gate, Teflon filter, thermoelectric module, U-tube, injection port fast joint one
It terminates into sample gas under study, the injection port fast joint other end is connected to by pipeline with drying tube one end, and the drying tube other end is logical
It crosses pipeline to be connected to early gate one end, the early gate other end passes through the inlet communication of pipeline and Teflon filter, Teflon mistake
The outlet of filter is connected to by pipeline with U-tube one end, and the U-tube other end is connected by the air inlet of pipeline and gas absorption cell
Logical, the thermoelectric module clamping contact U-tube forms heat exchange；
Outlet gas circuit includes late gate, vacuum pump, outlet fast joint, and late gate one end is gone out by pipeline and gas absorption cell
Port connection, the late gate other end pass through the inlet communication of pipeline and vacuum pump, and the outlet of vacuum pump passes through pipeline and outlet
The connection of fast joint one end.
The trace gas and its isotope real time on-line detection device, it is characterised in that: hot in the air inlet gas circuit
Temperature sensor is equipped at electric cooling piece, pipeline is equipped with pressure biography between late gate and gas absorption cell in the outlet gas circuit
Sensor, the host computer output respectively with the rear valve in early gate, thermoelectric module and the outlet gas circuit in air inlet gas circuit
Door, vacuum pump electrical connection, host computer input respectively with the temperature sensor in air inlet gas circuit, the pressure sensing in outlet gas circuit
Device electrical connection；
Host computer receives the signal of pressure sensor, and the switch of the control of the signal based on pressure sensor early gate, late gate
And the work of vacuum pump, to realize air inlet and the outlet of gas absorption cell；
Host computer receive temperature sensor signal, and based on temperature sensor signal control thermoelectric module work, make into
The under test gas for entering gas absorption cell reaches set temperature.
The trace gas and its isotope real time on-line detection device, it is characterised in that: control and signal processing part
In point, host computer also with other external processing equipment communication connections.
Trace gas of the present invention for detection includes but is not limited to CH4, CO2、H20、CO、O2、O3、C2H6、CH2O、NO、
N2O、NO2、NH3、H2S、SO2Deng, for detection isotope be aforementioned trace gas in isotope.
In the present invention, the spectral region of laser covering is including but not limited to ultraviolet band, visible light wave range, near-infrared
Wave band, middle infrared band etc..
Advantages of the present invention are as follows:
The present invention is based on laser absorption spectroscopies, are cooperated using laser and long-range gas absorption cell, realize to trace gas
And its real-time online detection of isotope, and using the modulation and lock-in techniques of optical maser wavelength, it can be realized laser stabilization
Output, and reduce interference of the external environment to laser.
Detailed description of the invention
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is U-tube and thermoelectric cooling chip architecture constitutional diagram of the present invention.
Fig. 3 is gas absorption cell structural schematic diagram of the present invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1 and Figure 2, trace gas and its isotope real time on-line detection device, including optical path measurement part, gas
Road part, control and signal processing, in which:
Optical path measurement portion point includes laser 1, beam splitter 3, the first collimating optical fibre head 4a, the second collimating optical fibre head 4b, phosgene body
The light end that goes out of absorption cell 5, the first photodetector 6a, the second photodetector 6b, laser 1 pass through the connection point of 2 optics of optical fiber
The light inlet of beam device 3, the first collimating optical fibre head 4a, the second collimating optical fibre head 4b pass through optical fiber optics connection beam splitter 3 not respectively
Same goes out light end, and the first photodetector 6a is set to the emitting light path of the first collimating optical fibre head 4a, the light inlet of gas absorption cell 5
Set on the emitting light path of the second collimating optical fibre head 4b, the second photodetector 6b is set to the light-emitting window of gas absorption cell 5；
Air path part includes air inlet gas circuit and outlet gas circuit, and sample gas under study is accessed in air inlet gas circuit one end, the other end accesses gas
The air inlet of body absorption cell 5, outlet optical path access the gas outlet of gas absorption cell 5；
Control and signal processing include host computer 14, lock-in amplifier 9, difference amplifier 8, preamplifier 7, laser wave
Long locking module 10, signal generator 13, current controller 12, temperature controller 11, the wherein output of signal generator 13 are distinguished
Be electrically connected with the input of current controller 12, lock-in amplifier 9, current controller 12, temperature controller 11 output respectively with
Laser 1 is electrically connected；First photodetector 6a, the second photodetector 6b are electrically connected with the input of preamplifier 7 respectively,
The output of preamplifier 7 is electrically connected with the input of difference amplifier 8, and the output of difference amplifier 8 is defeated with lock-in amplifier 9
Enter electrical connection, the output of lock-in amplifier 9 is electrically connected with the input of host computer 14, and the output of host computer 14 and optical maser wavelength lock
The input of module 10 is electrically connected, and the output of optical maser wavelength locking module 10 is electrically connected with the input of current controller 12；
In air path part, sample gas under study enters gas absorption cell 5 by air inlet gas circuit, the letter in control and signal processing
Number generator 13 loads preset modulating frequency information to current controller 12, current controller 12 be based on modulating frequency information to
Laser 1 exports the driving current of respective frequencies, to drive the work of laser 1 to generate the emergent light of corresponding wavelength；
The emergent light of laser 1 divides through beam splitter 3 for two-way light beam, wherein light beam is made as reference light, another way light beam all the way
To measure light, reference light reenters after the first collimating optical fibre head 4a collimation and is incident upon the first photodetector 6a, measures light through second
Enter gas absorption cell 5 after collimating optical fibre head 4b collimation, by repeatedly anti-in the gas absorption cell 5 for being filled with sample gas under study
The second photodetector 6b is finally emitted to after penetrating；
First photodetector 6a, the second photodetector 6b received optical signal is respectively converted into after electric signal be sent into it is preposition
Amplifier 7 is sent into difference amplifier 8 after the amplification of preamplifier 7, eliminates through difference amplifier 8 since laser shakes production
Lock-in amplifier 9 is sent into after raw noise, lock-in amplifier 9 is according to the corresponding electric signal of reference light telecommunications corresponding with measurement light
Number, the harmonic signal that information is absorbed comprising under test gas is demodulated, harmonic signal is sent into host computer 14 by lock-in amplifier 9；
Host computer 14 carries out data analysis after harmonic signal is converted to data, to calculate under test gas information data and feedback
Control information data；Host computer 14 is sent into optical maser wavelength lock after feedback error information data is converted to feedback error signal simultaneously
Cover half block 10, optical maser wavelength locking module 10 will be loaded onto current controller 12, electric current after feedback error signal converted voltage
Controller 12 converts voltages into after electric current the driving current for being superimposed to the output of current controller 12 to laser 1, realizes to swashing
The feedback control of 1 output light wavelength of light device.
Optical path measures in part, and laser 1 carries automatically controlled temperature-adjusting device, the output of current controller 12 and laser
1 current input terminal connection, the output of temperature controller 11 are connect with the automatically controlled temperature-adjusting device that laser 1 carries.
Optical path measures in part, and the beam splitting ratio of beam splitter 3 is 1:99, wherein 1% light beam enters first as reference light
Collimating optical fibre head 4a, 99% light beam enter the second collimating optical fibre head 4b as measurement light.
Optical path measures in part, the laser 1 of wave band is corresponded to according to the wave band type selecting of under test gas, further according to laser 1
Type selecting determine the first photodetector 6a, the second photodetector 6b type selecting.
In air path part, air inlet gas circuit includes injection port fast joint 16, drying tube 17, early gate 18, Teflon filter
19, sample gas under study is accessed in thermoelectric module 20, U-tube 21,16 one end of injection port fast joint, and injection port fast joint 16 is another
End is connected to by pipeline with 17 one end of drying tube, and 17 other end of drying tube is connected to by pipeline with 18 one end of early gate, early gate
18 other ends by the inlet communication of pipeline and Teflon filter 19, the outlet of Teflon filter 19 pass through pipeline with it is U-shaped
The connection of 21 one end of pipe, 21 other end of U-tube are connected to by pipeline with the air inlet of gas absorption cell 5, and thermoelectric module 20 clamps
It contacts U-tube 21 and forms heat exchange；
Outlet gas circuit includes late gate 23, vacuum pump 24, outlet fast joint 25, and 23 one end of late gate is inhaled by pipeline and gas
The gas outlet of receives pond 5 is connected to, and 23 other end of late gate passes through the inlet communication of pipeline and vacuum pump 24, and the outlet of vacuum pump 24 is logical
Pipeline is crossed to be connected to 25 one end of outlet fast joint.
Temperature sensor, late gate 23 and gas absorption cell in outlet gas circuit are equipped in air inlet gas circuit at thermoelectric module 20
Pipeline is equipped with pressure sensor 22 between 5, the output of host computer 14 respectively with the early gate 18 in air inlet gas circuit, thermoelectric cooling
Late gate 23, vacuum pump 24 in piece 20 and outlet gas circuit are electrically connected, and the input of host computer 14 is respectively and in air inlet gas circuit
Pressure sensor 22 in temperature sensor, outlet gas circuit is electrically connected；
Host computer 14 receives the signal of pressure sensor 22, and controls early gate 18, rear valve based on the signal of pressure sensor 22
The work of the switch and vacuum pump 24 of door 23, to realize air inlet and the outlet of gas absorption cell 5；
Host computer 14 receives the signal of temperature sensor, and the control thermoelectric module 20 of the signal based on temperature sensor works,
The under test gas into gas absorption cell 5 is set to reach set temperature.
In control and signal processing, host computer 14 also with other external 15 communication connections of processing equipment.
In air path part of the invention, the pipeline in air inlet gas circuit and outlet gas circuit is high-boron-silicon glass pipe, air inlet gas
Teflon filter 19 in road is Teflon granule phase substance filter.Thermoelectric module 20 is used in air inlet gas circuit, U-tube 21 is buried
Among thermoelectric module 20, for realizing the heat treatment of cryogenic gas or the cooling treatment of high-temperature gas, and then realize pair
The temperature of under test gas controls, and the influence of high temperature and low temperature to detection result is avoided, to realize high-precision isotope abundance
Value measurement.Particularly, for there is gas (such as NH of characterization of adsorption3) can be achieved to purge gass (N2) high-temperature pre-heat is carried out, it is used to
Elute the gas of absorption.
Early gate 18 and late gate 23 are solenoid valve, and vacuum pump 24 and solenoid valve can realize the fast sample of under test gas
And sample out.Vacuum pump 24 can realize positive pressure >=0.2Mpa, negative pressure≤- 0.075Mpa, gas flow 12L/min, it is contemplated that gas
The gas of 20 times/min most can be achieved in volume shared by absorption cell 5, gas circuit and solenoid valve and solenoid valve switching time, the present apparatus fastly
Body varies frequency.
In optical path measurement of the invention part, the type selecting of laser 1 includes but is not limited to: Distributed Feedback Laser, ICL laser,
QCL laser etc..The covering spectral region of laser 1 including but not limited to: ultraviolet band, visible light wave range, near infrared band,
Middle infrared band etc..
The type selecting of first, second photodetector 6a, 6b including but not limited to: GaP photodetector (150-550nm),
Si photodetector (200-1100nm), InGaAs photodetector (800-1700nm, 900-2600nm), Ge photodetector
(800-1800nm), PbS photodetector (1.0-2.9 μm), PbSe photodetector (1.0-2.9 μm), HgCdTe (MCT) light
Electric explorer (1.5-4.8 μm), photomultiplier tube PMT etc..
As shown in figure 3, gas absorption cell includes absorption cell stainless steel frame 56 and quartz glass cavity 55, quartz glass cavity
55 are connected in absorption cell stainless steel frame 56, and 55 axial ends of quartz glass cavity is respectively equipped with laser input window 53a(entering light
Mouthful), laser output window 53b(light-emitting window), absorption cell stainless steel frame 56 is equipped with and is connected to inside quartz glass cavity 55
Air inlet 51, gas outlet 52, axial end positions are respectively equipped with reflecting mirror 54a, reflecting mirror 54b in quartz glass cavity.
The light being emitted from the second collimating optical fibre head 4b is repeatedly round-trip in gas absorption cell, can be under conditions of 20cm base is long
Realize the light path of 25m.Gas absorption cell volume is only 400ml, greatly reduces under test gas sampling quantity.
In control and signal processing of the invention, current controller 12 can realize the electric current output of 0-2000ma, electricity
± 1 μ A of control precision of stream.Temperature controller 11 can realize that laser stablizes output under 0-60 DEG C of working environment, and control precision can
Up to 10mK.
13 module of signal generator can realize 0.1Hz-40MHz waveform modulated (containing triangular wave and sine wave), according to sampling
Frequency and the time of integration can determine the modulating frequency and carrier frequency of final actual detection.
Preamplifier 7 is used to realize the conversion of photosignal, the electricity that first, second photodetector 6a, 6b is converted
Press signal amplification (current signal then amplifies after overcurrent turns voltage module)
Difference amplifier 8 is used to eliminate the noise that the own power shake of laser generates, to further increase photosignal
Signal-to-noise ratio.
Lock-in amplifier 9 can extract signal amplitude and phase information in extremely strong noise circumstance.Lock-in amplifier 9 uses
Homodyne detection method and low-pass filtering technique measure signal amplitude and phase relative to periodic reference signal.Locking phase measurement
Signal in the extractable assigned frequency band centered on reference frequency of method, effectively filters out every other frequency component.Phase sensitivity inspection
The output of wave device is filtered out by low-pass filter compression bandwidth, a large amount of broadband noise, has lock-in amplifier 9 very strong
Inhibit noise immune.The passband width of lock-in amplifier 9 depends on the time constant of low-pass filter, and time constant is longer, band
It is wide narrower, it is also higher to the improvement of signal-to-noise ratio.The improvement of signal-to-noise ratio is directly proportional to the square root of time constant (time of integration).
The feedback error signal that host computer 14 is calculated is converted voltage signal superposition by optical maser wavelength locking module 10
Adder is integrated in laser diode current controller 12(current controller 12 and voltage turns current module, is realized after superimposed current
Control to output wavelength), to realize the feedback control exported to 1 wavelength of laser, stablize the output of 1 wavelength of laser.
The type selecting of host computer 14 is including but not limited to: MCU(8051 series monolithic, PIC series monolithic, STM32 series
Single-chip microcontroller), DSP(TI series, ADI series, Microchip series), CPU(Intel series, AMD series) etc..Host computer is used for
Realize signal acquisition, data analysis, feedback value signal output, the solenoid valve control, vacuum pump control, gas preheater of data
The functions such as the setting of (cooling) module temperature, airline pressure monitor, data show and transmit.
The real-time online testing process of trace gas and its isotope of the present invention is as follows:
Early gate 18 is closed in the control of host computer 14, and host computer 14 opens late gate 23, and host computer 14 is opened vacuum pump 24, will be absorbed
Residual gas extraction in pond 5 and gas channels, absorption cell 5 and gas channels form negative pressure.Sample gas under study via
Gas circuit connects 16 access detection devices fastly.Host computer 14 opens early gate 18, negative pressure of the sample gas under study in 18 rear end of early gate
Under the influence of and the swabbing action of vacuum pump 22 under, run through drying tube 17(to filter out the steam in sample to be tested) and
Teflon filter 19(is to filter out granule phase substance and aerosol in sample to be tested), under test gas passes through two panels thermoelectric module
It is heated or cooled to after the temperature of setting (as shown in Figure 2) after U-tube 21 among 20, quickly fills with absorption cell 5(such as Fig. 3
It is shown) and remaining gas channels.The real-time pressure in gas circuit is measured by the pressure sensor 22 being embedded in pipeline, until pressure
After power meets measurement standard, host computer 14 simultaneously closes off early gate 18 and late gate 23.Device enters measurement pattern at this time.
The temperature controller 11 and current controller 12 of laser 1 are opened in the control of host computer 14, are previously written modulating frequency
Information is injected into current controller 12 via signal generator 13 to realize the control to laser 1.1 output light of laser warp
By optical fiber 2, into 1:99 beam splitter 3, light beam is divided into two-way.1% that pass through the first collimating optical fibre head 4a all the way and directly squeeze into function
Rate detects detector 6a.99% that pass through the optical path entrance that the second collimating optical fibre head 4b enters absorption cell 5 all the way, which exists
It is driven into the second photodetector 6b after absorption cell multiple reflections by the optical path outlet of absorption cell 5.First photodetection
Device 6a and the second photodetector 6b converts optical signal into electric signal and send to pre-amplifier module 7, amplified signal warp
By difference amplifier 8, optical power photoextinction (photoextinction is to eliminate the shake of laser itself optical power herein) is realized, thus
Further improve the detectivity of system.Subsequent signal enters lock-in amplifier 9, demodulates and absorbs the humorous of information containing gas
Wave signal (signal contains gas concentration information, gas absorption peak information and Wavelength stabilized error signal), the signal is subsequent
It send to host computer 14.
Host computer 14 is responsible for signal acquisition, and signal acquisition includes acquiring harmonic signal, the acquisition pressure that lock-in amplifier 9 exports
The pressure signal of the output of force snesor 22, the temperature sensor signal being embedded between thermoelectric module 20.
Host computer 14 is responsible for signal control, and signal control includes start and stop laser 1, opens, closes 18 late gate of early gate
23, start and stop vacuum pump 24.
Host computer 14 is responsible for the analysis of data, converts digital signal for collected each road analog signal, calculate to
Survey concentration information, intensity signal, the absorption peak location information (under test gas identification) of gas, gas circuit pressure information, thermoelectric cooling
The temperature information of piece.
Host computer 14 is responsible for feedback error signal, the feedback comprising wavelength locking error signal, temperature control signals it is anti-
Feedback.To realize the locking of laser wavelength output and the stability contorting of gas path temperature.Its feedback principle is all based on PID control
System.
The wave band of surveyed gas is determined by HITRAN database, thus the laser 1 of selected different-waveband, laser 1
Type selecting has determined the type selecting of detector 6a, 6b, and then 5 laser input window 53a of absorption cell, laser output window 53b has been determined
Type selecting (typically seen light, near-infrared using K9 glass window, in it is infrared use calcirm-fluoride material window), window interface use
Mode is connect fastly to design.Near-infrared and visible light use fiber coupling mode to inject absorption cell, and mid-infrared light source uses free space
Coupled modes inject absorption cell.While according to the characteristic of laser scans width, achievable pure gas or multicomponent gas
Detection (including isotope detection).
Any step described in this embodiment can be carried out in any sequence or be carried out simultaneously, unless otherwise indicated
Or context demands.
All features disclosed in the present embodiment can be combined with any combination, in addition to this category feature and/or
The combining form of at least some of step phase mutual repulsion.Specifically, preferred feature of the invention is suitable for the invention institute
There is aspect and can use in any combination.Equally, feature described in nonessential combining form can be used alone
(without combination).
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (7)
1. trace gas and its isotope real time on-line detection device, it is characterised in that: including optical path measurement part, gas circuit portion
Point, control and signal processing, in which:
Optical path measurement portion point including laser, beam splitter, the first collimating optical fibre head, the second collimating optical fibre head, light gas absorption cell,
First photodetector, the second photodetector, the entering light for going out light end and connecting beam splitter by optical fiber optics of the laser
End, the first collimating optical fibre head, the second collimating optical fibre head pass through respectively optical fiber optics connection beam splitter it is different go out light end, described the
One photodetector is set to the emitting light path of the first collimating optical fibre head, and the light inlet of the gas absorption cell is set to the second collimated light
The emitting light path of fine head, second photodetector are set to the light-emitting window of gas absorption cell；
Air path part includes air inlet gas circuit and outlet gas circuit, and sample gas under study is accessed in air inlet gas circuit one end, the other end accesses institute
The air inlet of gas absorption cell is stated, outlet optical path accesses the gas outlet of gas absorption cell；
Control and signal processing include host computer, lock-in amplifier, difference amplifier, preamplifier, optical maser wavelength lock
Cover half block, signal generator, current controller, temperature controller, wherein signal generator output respectively with current controller, lock
The input of phase amplifier is electrically connected, and the output of current controller, temperature controller is electrically connected with the laser respectively；Described
One photodetector, the second photodetector are electrically connected with the input of preamplifier respectively, the output of preamplifier and poor
The input electrical connection of point amplifier, the output of difference amplifier are electrically connected with the input of lock-in amplifier, lock-in amplifier it is defeated
It is electrically connected out with the input of host computer, the output of host computer is electrically connected with the input of optical maser wavelength locking module, optical maser wavelength lock
The output of cover half block is electrically connected with the input of current controller；
In air path part, sample gas under study enters gas absorption cell by air inlet gas circuit, the letter in control and signal processing
Number generator loads preset modulating frequency information to current controller, and current controller is based on modulating frequency information to laser
The driving current of respective frequencies is exported, to drive laser works to generate the emergent light of corresponding wavelength；
The emergent light of laser is divided into two-way light beam through beam splitter, wherein light beam is as reference light, another way light beam conduct all the way
Light is measured, reference light reenters after the first collimating optical fibre head collimation and is incident upon the first photodetector, measures light through the second collimated light
Enter gas absorption cell after fine head collimation, is finally gone out after multiple reflections in the gas absorption cell for being filled with sample gas under study
It is incident upon the second photodetector；
Received optical signal is respectively converted into after electric signal by the first photodetector, the second photodetector is sent into preposition amplification
Device is sent into difference amplifier after preamplifier amplifies, and eliminates the noise generated due to laser shake through difference amplifier
After be sent into lock-in amplifier, lock-in amplifier is demodulated according to the corresponding electric signal of reference light electric signal corresponding with measurement light
The harmonic signal of information is absorbed comprising under test gas, harmonic signal is sent into host computer by lock-in amplifier；
Host computer carries out data analysis after harmonic signal is converted to data, is missed with calculating under test gas information data and feedback
Poor information data；Host computer is sent into optical maser wavelength locking mould after feedback error information data is converted to feedback error signal simultaneously
Block, optical maser wavelength locking module will be loaded onto current controller after feedback error signal converted voltage, current controller will be electric
Pressure, which is converted to, to be superimposed to current controller after electric current and exports to the driving current of laser, is realized to laser output light wavelength
Feedback control.
2. trace gas according to claim 1 and its isotope real time on-line detection device, it is characterised in that: optical path is surveyed
It measures in part, laser carries automatically controlled temperature-adjusting device, and the output of current controller and the current input terminal of laser connect,
The output of temperature controller is connect with the automatically controlled temperature-adjusting device that laser carries.
3. trace gas according to claim 1 and its isotope real time on-line detection device, it is characterised in that: optical path is surveyed
Measure in part, the beam splitting ratio of beam splitter is 1:99, wherein 1% light beam as reference light into the first collimating optical fibre head, 99%
Light beam as measurement light enter the second collimating optical fibre head.
4. trace gas according to claim 1 and its isotope real time on-line detection device, it is characterised in that: optical path is surveyed
It measures in part, the laser of wave band is corresponded to according to the wave band type selecting of under test gas, determines the first light further according to the type selecting of laser
Electric explorer, the second photodetector type selecting.
5. trace gas according to claim 1 and its isotope real time on-line detection device, it is characterised in that: gas circuit portion
In point, air inlet gas circuit includes injection port fast joint, drying tube, early gate, Teflon filter, thermoelectric module, U-tube, into
Sample gas under study is accessed in the outspoken connector one end of sample, and the injection port fast joint other end is connected to by pipeline with drying tube one end, does
The dry pipe other end is connected to by pipeline with early gate one end, and the early gate other end is connected by the import of pipeline and Teflon filter
Logical, the outlet of Teflon filter is connected to by pipeline with U-tube one end, and the U-tube other end passes through pipeline and gas absorption cell
Air inlet connection, the thermoelectric module clamping contact U-tube forms heat exchange；
Outlet gas circuit includes late gate, vacuum pump, outlet fast joint, and late gate one end is gone out by pipeline and gas absorption cell
Port connection, the late gate other end pass through the inlet communication of pipeline and vacuum pump, and the outlet of vacuum pump passes through pipeline and outlet
The connection of fast joint one end.
6. trace gas according to claim 5 and its isotope real time on-line detection device, it is characterised in that: it is described into
Temperature sensor is equipped in gas gas circuit at thermoelectric module, pipeline is pacified between late gate and gas absorption cell in the outlet gas circuit
Equipped with pressure sensor, the host computer output respectively with early gate, thermoelectric module and the outlet gas in air inlet gas circuit
Late gate in road, vacuum pump electrical connection, the input of host computer respectively in air inlet gas circuit temperature sensor, in outlet gas circuit
Pressure sensor electrical connection；
Host computer receives the signal of pressure sensor, and the switch of the control of the signal based on pressure sensor early gate, late gate
And the work of vacuum pump, to realize air inlet and the outlet of gas absorption cell；
Host computer receive temperature sensor signal, and based on temperature sensor signal control thermoelectric module work, make into
The under test gas for entering gas absorption cell reaches set temperature.
7. trace gas according to claim 1 and its isotope real time on-line detection device, it is characterised in that: control and
In signal processing, host computer also with other external processing equipment communication connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460342.4A CN110160990A (en) | 2019-05-30 | 2019-05-30 | Trace gas and its isotope real time on-line detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460342.4A CN110160990A (en) | 2019-05-30 | 2019-05-30 | Trace gas and its isotope real time on-line detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110160990A true CN110160990A (en) | 2019-08-23 |
Family
ID=67629953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910460342.4A Pending CN110160990A (en) | 2019-05-30 | 2019-05-30 | Trace gas and its isotope real time on-line detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110160990A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726793A (en) * | 2019-11-20 | 2020-01-24 | 中国科学院植物研究所 | Isotope mass spectrum sample introduction system for researching photosynthesis gas exchange |
| CN111007025A (en) * | 2019-12-27 | 2020-04-14 | 深圳华领医学技术有限公司 | Detection device capable of detecting and displaying three concentrations of methane gas |
| CN113063756A (en) * | 2021-02-26 | 2021-07-02 | 河北地质大学 | TDLAS-based on-line measurement method and device for ratio of nitrogen isotopes in ammonia |
| CN113959981A (en) * | 2021-10-21 | 2022-01-21 | 中国科学院合肥物质科学研究院 | Real-time online observation device for carbonyl sulfide (COS) trace gas |
| CN114279496A (en) * | 2021-12-17 | 2022-04-05 | 中国科学院长春光学精密机械与物理研究所 | Gas optical isolation device and method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6369387B1 (en) * | 1999-10-15 | 2002-04-09 | Li-Cor, Inc. | Gas analyzer |
| CN102954948A (en) * | 2011-08-26 | 2013-03-06 | 中国科学院安徽光学精密机械研究所 | Gas sensor based on photoacoustic spectrometry |
| CN104964948A (en) * | 2015-06-11 | 2015-10-07 | 李昌伟 | System for detecting Helicobacter pylori infection |
| CN105277503A (en) * | 2015-08-20 | 2016-01-27 | 安徽大学 | Two quantum cascade laser spectrum-based multicomponent gas simultaneous detection device and method |
| CN105388125A (en) * | 2015-10-30 | 2016-03-09 | 苏州优康通信设备有限公司 | Optical detection system for carbon monoxide concentration |
| CN107014774A (en) * | 2017-06-08 | 2017-08-04 | 武汉米字能源科技有限公司 | A kind of double air chamber trace gas analysis systems and gas concentration in parallel calculate method |
| CN208013060U (en) * | 2018-04-11 | 2018-10-26 | 中国石油大学(华东) | A kind of more gas detecting systems of wave-length coverage and wavelength continuously adjustable |
-
2019
- 2019-05-30 CN CN201910460342.4A patent/CN110160990A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6369387B1 (en) * | 1999-10-15 | 2002-04-09 | Li-Cor, Inc. | Gas analyzer |
| CN102954948A (en) * | 2011-08-26 | 2013-03-06 | 中国科学院安徽光学精密机械研究所 | Gas sensor based on photoacoustic spectrometry |
| CN104964948A (en) * | 2015-06-11 | 2015-10-07 | 李昌伟 | System for detecting Helicobacter pylori infection |
| CN105277503A (en) * | 2015-08-20 | 2016-01-27 | 安徽大学 | Two quantum cascade laser spectrum-based multicomponent gas simultaneous detection device and method |
| CN105388125A (en) * | 2015-10-30 | 2016-03-09 | 苏州优康通信设备有限公司 | Optical detection system for carbon monoxide concentration |
| CN107014774A (en) * | 2017-06-08 | 2017-08-04 | 武汉米字能源科技有限公司 | A kind of double air chamber trace gas analysis systems and gas concentration in parallel calculate method |
| CN208013060U (en) * | 2018-04-11 | 2018-10-26 | 中国石油大学(华东) | A kind of more gas detecting systems of wave-length coverage and wavelength continuously adjustable |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726793A (en) * | 2019-11-20 | 2020-01-24 | 中国科学院植物研究所 | Isotope mass spectrum sample introduction system for researching photosynthesis gas exchange |
| CN110726793B (en) * | 2019-11-20 | 2020-12-08 | 中国科学院植物研究所 | Isotope mass spectrum sample introduction system for researching photosynthesis gas exchange |
| CN111007025A (en) * | 2019-12-27 | 2020-04-14 | 深圳华领医学技术有限公司 | Detection device capable of detecting and displaying three concentrations of methane gas |
| CN113063756A (en) * | 2021-02-26 | 2021-07-02 | 河北地质大学 | TDLAS-based on-line measurement method and device for ratio of nitrogen isotopes in ammonia |
| CN113959981A (en) * | 2021-10-21 | 2022-01-21 | 中国科学院合肥物质科学研究院 | Real-time online observation device for carbonyl sulfide (COS) trace gas |
| CN114279496A (en) * | 2021-12-17 | 2022-04-05 | 中国科学院长春光学精密机械与物理研究所 | Gas optical isolation device and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110160990A (en) | Trace gas and its isotope real time on-line detection device | |
| CN106802288B (en) | Gas-detecting device and method based on tunable laser and super continuous spectrums laser | |
| CN104280362B (en) | A kind of superheated vapor laser spectrum on-line detecting system | |
| CN107144549B (en) | Detection device and method based on TDLAS trace CO gas concentration | |
| von Bobrutzki et al. | Field inter-comparison of eleven atmospheric ammonia measurement techniques | |
| CN109085133B (en) | Off-axis integral cavity atmosphere CH based on real-time reflectivity correction4Concentration measuring device and measuring method thereof | |
| CN101308090A (en) | Fire field multi- parameter optical maser wavelength modulated spectrum detector method and apparatus | |
| Edwards et al. | A diode laser based gas monitor suitable for measurement of trace gas exchange using micrometeorological techniques | |
| CN108801977B (en) | Device and method for detecting carbon dioxide gas of non-calibrated trace carbon 12 and carbon 13 | |
| CN111707634A (en) | Multi-channel gas concentration detection system and method based on mid-infrared absorption spectrum | |
| CN106382987A (en) | All-fiber laser heterodyne solar radiometer | |
| CN110320178A (en) | A kind of gas detecting system and its detection method based on wavelength modulation spectrum technology | |
| CN107389560A (en) | Multiband all -fiber high spectral resolution total atmospheric spectral transmittance simultaneous measuring apparatus and measuring method | |
| CN114993987B (en) | Temperature and gas concentration measuring method and system based on absorption spectrum amplitude modulation | |
| CN201210140Y (en) | Multi-parameter laser wavelength modulation spectrum detection apparatus used in fire field | |
| CN206862883U (en) | Detection means based on TDLAS trace CO gas concentrations | |
| Dang et al. | A compact self-calibration atmospheric CH4 sensor based on NIR laser and new type multi-pass gas cell | |
| CN203275292U (en) | Instrument for detecting concentration and visibility of CO (Carbonic Oxide) | |
| CN108613946A (en) | Seed vitality measuring system based on laser absorption spectroscopy and method | |
| Zou et al. | Multigas sensing based on wavelength modulation spectroscopy using frequency division multiplexing combined with time division multiplexing | |
| CN213633165U (en) | Nitrogen oxide measuring system based on laser spectrum absorption method | |
| Pilgrim et al. | Optical multi-gas monitor technology demonstration on the International Space Station | |
| CN113533249A (en) | N2O detection system and method based on open optical path and wavelength modulation | |
| Chang et al. | Detection of O18 and D Isotopes in Water Vapor using a Fiber-Coupled Tunable Diode Laser Absorption Spectroscopy Multi-Pass Cell | |
| Hu et al. | Triple-range adjustable plane-concave multipass gas cell for high-precision trace gas detection based on TDLAS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200805 Address after: 518000 Laiweis Industrial Plant 505A, Sunshine Fourth Road, Sunshine Community, Xili Street, Nanshan District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Hualing Medical Technology Co.,Ltd. Address before: 518000 laiweisi industrial plant 505a, sunshine community, Xili street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: Shenzhen Hualing Gas Technology Co.,Ltd. |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190823 |