CN105466491B - The imaging type ignition temperature apparatus for measuring concentration to be filtered based on binary channels molecule - Google Patents
The imaging type ignition temperature apparatus for measuring concentration to be filtered based on binary channels molecule Download PDFInfo
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Abstract
The imaging type ignition temperature apparatus for measuring concentration to be filtered based on binary channels molecule.The invention discloses a kind of imaging type combustion measurement devices based on binary channels molecule optical filtering technique, are related to the measurement of ignition temperature concentration.The device is by optical receiver unit（1）, total beam splitter（2）, first passage molecule optical filtering imaging detection component（3）, second channel molecule optical filtering imaging detection component（4）With data processing and image-display units（5）Composition.Binary channels molecule filter unit uses two sets of molecule filtering assemblies, obtains two groups of different radiation spectrums of temperature-sensitivity coefficient, the inverting for combustion field temperature and concentration of component respectively.It is an advantage of the invention that：Since the imaging type combustion diagnosis device of binary channels molecule optical filtering technique has the ability of high spectral resolution, high time resolution, the ability of high-space resolution and non-contact forecasting, so that the present invention has many advantages, such as high certainty of measurement, stable and reliable in work, strong antijamming capability, the CO concentration and temperature information of combustion zone can be obtained simultaneously.
Description
Technical field
The present invention relates to the imaging type combustion diagnosis dresses that the measurement of ignition temperature concentration more particularly to ultra-narrow filter with molecule
It sets.
Background technology
The fast-developing demand to the energy of national economy is increasing, currently, world energy supplies there are about 80% be all by
Burning generates, thus, realize that the conversion of high efficiency heat is significant for energy conservation and environmental protection in combustion.Studies have shown that
The working condition of the combustion parameters such as the flame structure and temperature of combustion zone, concentration of component and combustion system, efficiency of combustion, burning are produced
Object（Including pollutant effulent）There is substantial connection.Combustion diagnosis technology, especially in combustion can be real-time, online, fixed
Amount obtains the non-contact optical diagnostic techniques of the combustion parameters such as temperature and the concentration of component of combustion zone, and burning in large-sized boiler is
The fields such as system, large-scale gas turbine, aerospace engine have played vital effect, for control combustion process, carry
High burning efficiency reduces pollution production discharge, ensures that combustion system is significant safely.
Imaging type combustion diagnosis method in the case where not interfering combustion process while can obtain time of combustion parameter
Information and spatial information, the working condition in intuitive reactive combustion area, are more widely applied.Traditional imaging type combustion diagnosis dress
Setting mainly has Two-color Measure Thermometer based on black body radiation principle and thermal infrared imager, is based on Fourier transform infrared imaging spectrometer
Combustion diagnosis technology, the Tomographic Diagnosis Technology etc. based on laser light scattering and Optical Absorption Method.Document（”Development
of Two-Color Thermometer Using a Color CCD Camera and Measurement Technology
of Tuyere and Raceway of Blast Furnace”, Tetsu to hagane-journal of the Iron
and Steel Institute of Japan, 2013, 99(5):10-17）It is adopted using Two-color Measure Thermometer and colorful CCD camera
Collect the heat radiation images data of combustion zone, using black body radiation gross energy and the direct functional relation of its thermodynamic temperature, instead
It drills to obtain the Temperature Distribution of combustion zone, but when this method Inversion Calculation ignition temperature, grey body need to be done to tested region it is assumed that making
Obtaining temperature retrieval result, there are large errors with actual conditions；Document（”Mid-IR hyperspectral imaging of
laminar flames for 2-D scalar values”, Optics Express, 2014, 22(18): 21600–
21617）Combustion diagnosis is carried out using Fourier transform infrared imaging spectrometer, the interference image by acquiring combustion zone carries out Fu
In leaf transformation obtain the spectral information of flame, inverting obtains the combustion parameters such as temperature, concentration of component, this method by imaging technique with
Spectral technique is combined, and not only can intuitively obtain the flame structure of combustion zone, but also can identify combustion product according to characteristic spectrum
And production concentration and ignition temperature are measured by correction, but since imaging spectrometer is complicated, need optical scanner so that its
Optical stability and spectral resolution can not be taken into account, mutually be restricted between detectivity and optical property simultaneously, thus, it is based on
There are many engineering challenges in industry spot application for the combustion diagnosis technology of Fourier transform infrared imaging spectrometer；Document（”
Raman/Rayleigh scattering and CO-LIF measurements in laminar and turbulent
jet flames of dimethyl ether”, Combustion and Flame, 2012, 159(8): 2533–2562）
It is obtained using laser and Rayleigh scattering, Raman scattering and laser induced fluorescence effect caused by the interaction of combustion zone gaseous substance
Take combustion zone information of flow, Rayleigh scattering effect that can obtain temperature and velocity information, Raman scattering effect can obtain dense
Degree and temperature information, concentration of component information, in comparison, laser light scattering techniques can be obtained using laser induced fluorescence effect
With lot of advantages, for example, can non-contact measurement pneumatic, hot or chemical disturbance is reduced or avoided, high temperature and severe can be born
Environment has regular hour and spatial resolving power, can obtain the information of flow such as temperature and concentration of component, but the technology
There is significant limitations, the interference of the mainly strong bias light in combustion zone, laser induced effect and the spuious scattering of laser etc. is more difficult to be avoided,
And system complex, equipment are expensive.
Molecule optical filtering technique is to realize optical filtering purpose, the technology to the residual quantity absorption of signal light using gas molecule
The not only imaging capability with high spectral resolution, high time resolution and high-space resolution, but also can effectively inhibit spuious background
Radiated noise has been applied to the satellite remote sensing of atmospheric greenhouse gas, day more particularly to filter out the infrared radiation signal of interference gas
The fields such as right feed channel leakage Scout and survey on-board, hazardous gas spillage early warning.Document（“Real-time gas-correlation
imaging employing hermal background radiation”, Optics Express, 2000, 6(4):
92–103）The leakage of ammonia, ethylene and methane gas is detected using molecule filtering device and thermal infrared imager, high sensitivity reaches
200 ppm×m。
Invention content
The purpose of the present invention is：A kind of imaging type combustion measurement device based on binary channels molecule optical filtering technique is provided, it should
The binary channels molecule filter unit of device uses two sets of molecule filtering assemblies, obtains two groups of different spokes of temperature-sensitivity coefficient respectively
Spectrum is penetrated, the inverting for combustion field temperature and concentration of component.It is an advantage of the invention that：Due to binary channels molecule optical filtering technique
Imaging type combustion diagnosis device has high spectral resolution, high time resolution, the ability of high-space resolution and non-contact forecasting
Ability so that the present invention have high certainty of measurement, stable and reliable in work, strong antijamming capability, combustion zone can be obtained simultaneously
CO concentration and the advantages that temperature information.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
1, structure
A kind of imaging type combustion measurement device based on binary channels molecule optical filtering technique is by optical receiver unit, total beam splitting
Mirror, first passage molecule optical filtering imaging detection component, second channel molecule optical filtering imaging detection component and data processing and image
Display unit forms；
Receive optical unit and use telescope, total beam splitter is placed in the output light path of optical receiver unit, and with look in the distance
The optical axis of mirror is in 45° angle, and the transmission of total beam splitter and reflection beam splitting ratio are 50:50；
First passage molecule optical filtering imaging detection component absorbs molecule bubble, the first speculum, the by the first beam splitter, first
One reference molecule bubble, the second speculum, the first light combination mirror, the first optical filter, the first imaging len and the first infra-red imaging array
Composition；First beam splitter is positioned in the reflected light light path of total beam splitter, and parallel with total beam splitter, the first beam splitter transmitted light
The first absorption molecule bubble and the first speculum are sequentially placed in light path, be sequentially placed in reflected light light path the first reference molecule bubble and
Second speculum places the first light combination mirror in the reflected light light path of the first speculum and the second speculum intersection area, and first closes beam
Mirror is parallel with the first beam splitter, and the transmission of the first light combination mirror and reflection beam splitting ratio are 50:50, the combined beam light side of the first light combination mirror
To the first optical filter, the first imaging len and the first infra-red imaging array is sequentially placed, the first infra-red imaging array is positioned over
On the focal plane of one imaging len, the first speculum and the second speculum are in small angle with the first beam splitter so that first
Speculum reflection absorbs right half of imaging of the light in the first infra-red imaging array, and the reference light of the second speculum reflection is first
The left half of imaging of infra-red imaging array；The first effective air chamber length for absorbing molecule bubble is 4cm, and the CO of 0.1atm is filled in bubble
Effective air chamber length of gas, the first reference bubble is 4cm, and the N2 gases of 1atm are filled in bubble；The centre wavelength of first optical filter
For 4.76 μm, 0.1 μm of transmitted spectrum bandwidth, transmission spectral pattern be the first filter transmission spectrum；
Second channel molecule optical filtering imaging detection component absorbs molecule bubble, third speculum, the by the second beam splitter, second
Two reference molecules bubble, the 4th speculum, the second light combination mirror, the second optical filter, the second imaging len and the second infra-red imaging array
Composition；Second beam splitter is positioned in the reflected light light path of total beam splitter, and parallel with total beam splitter；Second beam splitter transmitted light
The second absorption molecule bubble and third speculum are sequentially placed in light path, be sequentially placed in reflected light light path the second reference molecule bubble and
4th speculum；The second light combination mirror, the second light combination mirror are placed in the reflected light light path intersection area that third speculum and the 4th reflect
Parallel with the second beam splitter, the transmission of the second light combination mirror and reflection beam splitting ratio are 50:50, the combined beam light direction of the second light combination mirror
It is sequentially placed the second optical filter, the second imaging len and the second infra-red imaging array, the second infra-red imaging array is positioned over second
On the focal plane of imaging len, third speculum and the 4th speculum are in small angle with the second beam splitter so that second is anti-
That penetrates mirror reflection absorbs right half of imaging of the light in the second infra-red imaging array, and the reference light of the 4th speculum reflection is red second
The left half of imaging of outer imaging array；The second effective air chamber length for absorbing molecule bubble is 4cm, and the CO gas of 0.3atm is filled in bubble
Body；Effective air chamber length of second reference bubble is 4cm, and the N of 1atm is filled in bubble2The centre wavelength of gas, the second optical filter is
4.9 μm, 0.1 μm of transmitted spectrum bandwidth, transmission spectral pattern be the second filter transmission spectrum；
Data processing shows mould with image-display units by image data acquiring module, image data processing module and image
Block forms；The image data output end of first infra-red imaging array and the second infra-red imaging array is connected respectively to image data and adopts
Collect the data input pin of module, the data that the data output end of image data acquiring module is connected to image data processing module are defeated
Enter end, the data output end of image data processing module is connected to the data input pin of image display.
The advantage of the invention is that：
1, precision height, high sensitivity.Molecule optical filtering technique used by this combustion diagnosis device is a kind of with EO-1 hyperion
The optical filtering means of resolution capability have pectination transmissison characteristic, can not only obtain the strength information of a plurality of transition spectral line simultaneously, but also can
Effectively to inhibit the clutter noise between transition spectral line so that detection system has higher signal-to-noise ratio；In addition the present invention is to utilize
The temperature susceplibility realization combustion parameter acquisition for turning transition spectral line of shaking of molecule, selected transition bands of a spectrum band is that the fundamental frequency of molecule jumps
It moves, strong tens even thousands of times of the general frequency transition bands of a spectrum of spectral line strength ratio；So that this combustion diagnosis device have higher precision and
Sensitivity.
2, strong antijamming capability.Molecule filtering assembly is made of narrowband infrared fileter and molecule filtering device, has comb
Shape transmissison characteristic, not only can inhibit the heat radiated noise of the combustion system itself outside spike filter band, but also can filter out optical filter band
The infra-red radiation of interior high temperature stray gas interferes, and compared with thermal infrared imager and Two-color Measure Thermometer, this combustion diagnosis device has
Stronger environment resistant interference performance.
3, it can be imaged, there is spatial resolving power.This combustion diagnosis device by molecule optical filtering imaging technique with it is infrared heat at
As technology is combined, temperature field and the concentration field information of combustion zone can be obtained simultaneously, with based on laser light scattering method at
As diagnostic techniques is compared, this combustion diagnosis device has higher spatial resolving power.
4, stable and reliable in work.This combustion diagnosis device using the heat radiation of combustion system itself as signal source, using point
Sub- optical filtering image-forming assembly obtains the fine spectral information of combustion zone, with Infrared Imaging Spectrometer and based on laser light scattering method
Tomographic Diagnosis Technology compare, present apparatus temperature simple in structure, critical component is small by environmental disturbances such as temperature disturbances, have work
Reliable and stable advantage.
5, non-contact forecasting.This combustion diagnosis device at work, is not necessarily to catalytic combustion region, will not be to burned
Journey generates any interference, and the combustion parameter obtained is not influenced by detection process, can reactive combustion system real work state,
And it can realize On-line sampling system.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the imaging type combustion measurement device based on binary channels molecule optical filtering technique.
Wherein：1 optical receiver unit, 2 total beam splitters, 3 first passage molecule optical filtering imaging detection components, 4 second channels
Molecule optical filtering imaging detection component, 5 data processings and image-display units.
Fig. 2 is the structural schematic diagram of first passage molecule optical filtering imaging detection component.
Wherein：2 total beam splitters, 3 first passage molecule optical filtering imaging detection components, 5 data processings and image-display units,
31 first beam splitters, 32 first absorb molecule bubbles, 33 first speculums, 34 first reference molecules bubble, 35 second speculums, 36 the
One light combination mirror, 37 first optical filters, 38 first imaging lens, 39 first infra-red imaging arrays.
Fig. 3 is combustion zone image formed by the first infra-red imaging array.
Wherein：39 first infra-red imaging arrays, 391 first absorption images, 392 first reference pictures.
Fig. 4 is the structural schematic diagram of second channel molecule optical filtering imaging detection component.
Wherein：2 total beam splitters, 4 second channel molecule optical filtering imaging detection components, 5 data processings and image-display units,
41 second beam splitters, 42 second absorb molecule bubbles, 43 third speculums, 44 second reference molecules bubble, 45 the 4th speculums, 46 the
Two light combination mirrors, 47 second optical filters, 48 second imaging lens, 49 second infra-red imaging arrays.
Fig. 5 is the structural schematic diagram of data processing and image-display units.
Wherein：3 first passage molecule optical filtering imaging detection components, 4 second channel molecule optical filtering imaging detection components, 5 numbers
According to processing and image-display units, 51 image data acquiring modules, 52 image data processing modules, 53 image displays.
Fig. 6 is the imaging type temperature sensing schematic diagram of binary channels molecule optical filtering technique.
Wherein：CO molecules when 61 first filter transmission spectrum, 62 second filter transmission spectrum, 63 temperature T=800K
Shake-CO molecules shakes when turning Transition Spectra, 64 temperature T=1200K-turn Transition Spectra.
Fig. 7 is the CO spectrum integrals intensity and its ratio variation with temperature curve in two channels.
Wherein：71 first passage CO spectrum integral intensity variation with temperature curves, 72 second channel CO spectrum integrals are strong
Spend variation with temperature curve, 73 two channels CO spectrum integral intensity ratio variation with temperature curve.
Fig. 8 is first passage CO spectrum integrals intensity under different temperatures with the change curve of concentration.
Wherein：When 81 temperature T=800K first passage CO spectrum integrals intensity with the change curve of concentration, 82 temperature T=
First passage CO spectrum integrals intensity when 1000K is with the first passage CO under the change curve of concentration, 83 temperature T=1200K
Spectrum integral intensity with concentration change curve.
Fig. 9 is key component and its infrared radiation spectrum in combustion zone.
Wherein：Infrared radiation spectrum, 92 CO of 91 CO gases2The infrared radiation spectrum of gas, 93 H2O gases it is infrared
Radiation spectrum.
Figure 10 is that CO radiates the transmission spectral line group through the first optical filter and the second optical filter.
Wherein：The equivalent transmission spectral pattern of 101 first passage molecule filtering assemblies, 102 second channel molecule filtering assemblies
Equivalent transmission spectral pattern.
Figure 11 is the filter effect of molecule optical filtering imaging detection component.
Wherein：The infrared radiation spectrum of the 111 CO gases to filter without molecule, 112 H to filter without molecule2O gases
The H after molecule filters of the infrared radiation spectrum of CO gases, 114 after molecule filters of infrared radiation spectrum, 1132O gases it is infrared
Radiation spectrum.
Specific implementation mode
Below in conjunction with the accompanying drawings, the invention will be further described.
1, structure
As shown in Figure 1, a kind of imaging type combustion diagnosis device based on binary channels molecule optical filtering technique receives list by optics
Member 1, total beam splitter 2, first passage molecule optical filtering imaging detection component 3,4 sum number of second channel molecule optical filtering imaging detection component
It is formed according to processing and image-display units 5.
Receiving optical unit 1 uses telescope, the telescope that Galilean type telescope or keplerian telescope can be used
Or Newtonian telescope etc., the reception spectrum of these telescopes cover 4~5 μm.
Total beam splitter 2 is placed in the output light path of optical receiver unit 1, and is in 45° angle, total beam splitting with the optical axis of telescope
The transmission of mirror 2 and reflection beam splitting ratio are 50:50.
It is steeped as shown in Fig. 2, first passage molecule optical filtering imaging detection component 3 absorbs molecule by the first beam splitter 31, first
32, the first speculum 33, the first reference molecule steep the 34, second speculum 35, the first light combination mirror 36, the first optical filter 37, first
Imaging len 38 and the first infra-red imaging array 39 composition.
Wherein, the first beam splitter 31 is positioned in the reflected light light path of total beam splitter 2, and parallel with total beam splitter 2.First
It is sequentially placed the first absorption molecule bubble 32 and the first speculum 33 in 31 transmitted light light path of beam splitter, is put successively in reflected light light path
Set the first reference molecule bubble 34 and the second speculum 35；It is intersected in the reflected light light path of the first speculum 33 and the second speculum 35
The first light combination mirror 36 is placed in area, and the first light combination mirror 36 is parallel with the first beam splitter 31, the transmission and reflection point of the first light combination mirror 36
Light ratio is 50:50, the combined beam light direction of the first light combination mirror 36 is sequentially placed the first optical filter 37, the first imaging len 38 and
One infra-red imaging array 39, the first infra-red imaging array 39 are positioned on the focal plane of the first imaging len 38, the first speculum
33 and second speculum 35 with the first beam splitter 31 be in small angle so that the first speculum 33 reflection absorption light first
The right half of imaging of infra-red imaging array 39, the reference light of the second speculum 35 reflection is left the half of the first infra-red imaging array 39
Side be imaged, as shown in figure 3, wherein in figure 391 be right one side of something image, 392 for left one side of something image.
The above-mentioned first effective air chamber length for absorbing molecule bubble 32 is 4cm, and the CO gases of 0.1atm are filled in bubble；First ginseng
The effective air chamber length for examining bubble 34 is 4cm, and the N2 gases of 1atm are filled in bubble；The centre wavelength of first optical filter 37 is 4.76 μ
M, 0.1 μm of transmitted spectrum bandwidth, transmission spectral pattern are the first filter transmission spectrum 61.
It is steeped as shown in figure 4, second channel molecule optical filtering imaging detection component 4 absorbs molecule by the second beam splitter 41, second
42, third speculum 43, the second reference molecule steep the 44, the 4th speculum 45, the second light combination mirror 46, the second optical filter 47, second
Imaging len 48 and the second infra-red imaging array 49 composition.
Wherein, the second beam splitter 41 is positioned in the reflected light light path of total beam splitter 2, and parallel with total beam splitter 2.Second
It is sequentially placed the second absorption molecule bubble 42 and third speculum 43 in 41 transmitted light light path of beam splitter, is put successively in reflected light light path
Set the second reference molecule bubble 44 and the 4th speculum 45；It is intersected in the reflected light light path of third speculum 43 and the 4th speculum 45
The second light combination mirror 46 is placed in area, and the second light combination mirror 46 is parallel with the second beam splitter 41, the transmission and reflection point of the second light combination mirror 46
Light ratio is 50:50, the combined beam light direction of the second light combination mirror 46 is sequentially placed the second optical filter 47, the second imaging len 48 and
Two infra-red imaging arrays 49, the second infra-red imaging array 49 are positioned on the focal plane of the second imaging len 48, third speculum
43 and the 4th speculum 45 with the second beam splitter 41 be in small angle so that the second speculum 43 reflection absorption light second
The right half of imaging of infra-red imaging array 49, the reference light of the 4th speculum 45 reflection is left the half of the second infra-red imaging array 49
Side is imaged.
The second effective air chamber length for absorbing molecule bubble 42 is 4cm, and the CO gases of 0.3atm are filled in bubble；Second with reference to bubble
44 effective air chamber length is 4cm, and the N of 1atm is filled in bubble2Gas.The centre wavelength of second optical filter 47 is 4.9 μm, transmits
0.1 μm of spectral bandwidth, transmission spectral pattern are the second filter transmission spectrum 62.
As shown in figure 5, data processing and image-display units 5 are by image data acquiring module 51, image real time transfer mould
Block 52 and image display 53 form.The image data of first infra-red imaging array 39 and the second infra-red imaging array 49 exports
End is connected respectively to the data input pin of image data acquiring module 51, the data output end connection of image data acquiring module 51
To the data input pin of image data processing module 52, the data output end of image data processing module 52 is connected to image and shows
The data input pin of module 53.
2, to the detection principle of pure CO gas temperatures and concentration
For pure CO gases, the transition spectral line group of P branch（4.67 μm~5.0 μm）In each spectral line intensity with temperature
Degree and change, the Transition Spectra 63 of CO molecules under temperature T=800K and the transition of CO molecules under temperature T=1200K are illustrated in Fig. 6
Spectrum 64.
4.76 ± 0.05 μm of spectral coverage selections are penetrated using the first optical filter 37, other spectrum are suppressed, and obtain the first filter
The CO of mating plate transmits spectral line group 101, and as shown in Figure 10, the total mark intensity of the spectral line group reduces as the temperature increases, such as
First passage CO spectrum integrals intensity variation with temperature curve 71 shown in Fig. 7.
4.9 ± 0.05 μm of spectral coverage selections are penetrated using the second optical filter 47, other spectrum are suppressed, and obtain the second optical filtering
The CO of piece transmits spectral line group 102, and as shown in Figure 10, the total mark intensity of the spectral line group increases as the temperature increases, such as Fig. 7
In second channel CO spectrum integral intensity variation with temperature curve 72.
By 71 point-by-point correspondence of first passage CO spectrum integral intensity variation with temperature curve divided by second channel CO spectrum
Integrated intensity variation with temperature curve 72 obtains the ratio variation with temperature curve of the CO spectrum integral intensity in two channels
73.Thus, separately detect the CO spectrum integral intensity to two channels, you can obtain the temperature of CO.
Under determining temperature condition, two channel C O spectrum integrals intensity increase with the increase of CO concentration, Fig. 8 displayings
First passage CO spectrum integrals intensity under different temperatures with concentration change curve.As a result, as the CO according to two channels
The ratio of spectrum integral intensity is worth to after temperature, you can obtains the concentration of CO according to the CO spectrum integral intensity of first passage.
3, the molecule optical filtering measuring principle of combustion zone
In combustion zone, other than with CO, also CO2、H2The components such as O, these components have infrared spectral radiant, such as
Shown in Fig. 9, wherein including infrared radiation spectrum 91, the CO of CO gases2The infrared radiation spectrum 92 and H of gas2O gases it is infrared
Radiation spectrum 93.Severe jamming to CO temperature and measurement of concetration, or even is caused not surveying by the presence of the radiation spectrum other than CO
Amount.For this purpose, the present invention is filtered out the radiation spectrum other than CO using the method that molecule filters, reach the mesh of CO signals optical filtering extraction
, it is final to obtain the image for only including CO strength distributing informations.The principle that CO molecules filter is as follows：
In first passage molecule optical filtering probe assembly 3：First reference picture 392 is to steep 34 by the first reference molecule
What light beam was formed, filled with N in the first reference molecule bubble 342Molecule does not have an impact the spectrum of 4.76 ± 0.05 μm of spectral coverages,
So containing all spectral informations of 4.76 ± 0.05 μm of spectral coverages in the first reference picture 392, as shown in figure 11, both contained not
The infrared radiation spectrum 111 of the CO gases to filter through molecule also contains the H to filter without molecule2The infrared radiation spectrum of O gases
112, etc.；And the image of the first absorption image 391 is formed by the light beam of the first absorption molecule bubble 32, first absorbs molecule
The CO spectrum in light beam in 4.76 ± 0.05 μm of spectral coverages are fully absorbed filled with CO gases, CO gases in bubble 32, therefore, first inhales
Receive the spectral signal for having lacked CO in image 391 completely.
After first absorption image 391 and the first reference picture 392 are acquired via image data acquiring module 51, then by image
Data processing module 52 subtracts each other the signal strength of each pixel of the first reference picture 392 is corresponding with the first absorption image 391,
The image of CO intensity distributions in the first the error image A, the first error image A obtained in only 4.76 ± 0.05 μm of spectral coverages.
As shown in figure 11, the infrared radiation spectrum 113 of CO gases there's almost no the interference spectrums of other components after optical filtering, reach CO
The purpose of molecule optical filtering spectrum purification.
In second channel molecule optical filtering probe assembly 2：It is poor that second is obtained by the second absorption image and the second reference picture
The method for being worth image B is identical as first passage molecule optical filtering 1 principle of probe assembly, and detailed process repeats no more.Second differential chart
As the image of the CO intensity distributions in B in only 4.9 μm of ± 0.05 μm of spectral coverages.
The signal strength of each pixel is combustion zone radiant light via first passage CO spectrum on first error image A
Integrated intensity, equally, the signal strength of each pixel is combustion zone radiant light via second channel on the second error image B
CO spectrum integral intensity, then by image data processing module 52 by the signal strength of each pixel of the first error image A with
Second error image B correspondences are divided by, according to the ratio variation with temperature curve 73 of the CO spectrum integral intensity in two channels, i.e.,
The temperature that the CO gases that each pixel is detected can be obtained, thus to obtain the temperature distribution image of combustion zone.Further according to Fig. 8
CO spectrum integrals intensity is with the change curve of concentration under shown different temperatures, the CO spectrum integral intensity obtained according to first passage
The concentration of CO is obtained, thus to obtain the concentration distribution image of combustion zone.
4, workflow
The gaseous product of combustion zone gives off stronger infrared spectrum under the high temperature conditions, these spectral informations connect through optics
It receives after unit 1 receives and is transmitted to total beam splitter 2, reflection and transmission two-way light beam are divided by equal proportion, reflected light path reaches first
Channel molecule optical filtering imaging detection component 3, transmitted light path reach second channel molecule optical filtering imaging detection component 4, the figure of the two
It is shown with image as signal carries out data processing through data line transfer to data processing and image-display units 5.
The reflected light path of total beam splitter 2 is after reaching first passage molecule optical filtering imaging detection component 3, first by first point
Beam mirror 31 divides to reflect and transmiting two-way light beam, and transmitted light path passes sequentially through the first absorption molecule and steeps the 32, first speculum 33, arrives
Up to the first light combination mirror 36, after reflective portion is by the first optical filter 37 and the first imaging len 38, in the first infrared imaging battle array
Right one side of something of row 39 obtains the first absorption image 391；The reflected light path of first beam splitter 31 passes sequentially through the first reference molecule bubble
34, the second speculum 35, reaches the first light combination mirror 36, and transmissive portion passes through the first optical filter 37 and the first imaging len 38
Afterwards, the first reference picture 392 is obtained in left one side of something of the first infra-red imaging array 39.
The transmitted light path of total beam splitter 2 is after reaching second channel molecule optical filtering imaging detection component 4, first by the second beam
Mirror 41 divides to reflect and transmiting two-way light beam, and reflected light path passes sequentially through the second absorption molecule bubble 42, third speculum 43, reaches
Second light combination mirror 46, after reflective portion is by the second optical filter 47 and the second imaging len 48, in the second infra-red imaging array
49 right one side of something obtains the first absorption image；The transmitted light path of second beam splitter 41 passes sequentially through the second reference molecule bubble 44, the
Four speculums 45 reach the second light combination mirror 46, after transmissive portion is by the second optical filtering 47 and the second imaging len 48, second
Left one side of something of infra-red imaging array 49 obtains the second reference picture.
The absorption image and reference picture that first infra-red imaging array 39 and the second infra-red imaging array 49 obtain are through image
After data acquisition module 51 acquires, after being handled by image data processing module 52, it is conveyed to image display 53 and burns
Situation directly displays.
Claims (2)
1. a kind of imaging type combustion measurement device based on binary channels molecule optical filtering technique, which is characterized in that the device is by optics
Receiving unit（1）, total beam splitter（2）, first passage molecule optical filtering imaging detection component（3）, second channel molecule filter imaging
Probe assembly（4）With data processing and image-display units（5）Composition；
Optical receiver unit（1）Using telescope, total beam splitter（2）It is placed in optical receiver unit（1）Output light path in, and with
The optical axis of telescope is in 45° angle, and the transmission of total beam splitter (2) and reflection beam splitting ratio are 50:50；
First passage molecule optical filtering imaging detection component（3）By the first beam splitter（31）, first absorb molecule bubble（32）, it is first anti-
Penetrate mirror（33）, the first reference molecule bubble（34）, the second speculum（35）, the first light combination mirror（36）, the first optical filter（37）, first
Imaging len（38）With the first infra-red imaging array（39）Composition；First beam splitter（31）It is positioned over total beam splitter（2）Reflection
In light light path, and with total beam splitter（2）It is parallel, the first beam splitter（31）The first absorption molecule bubble is sequentially placed in transmitted light light path
（32）With the first speculum（33）, the first reference molecule bubble is sequentially placed in reflected light light path（34）With the second speculum（35）,
The first light combination mirror (36) is placed in the reflected light light path of the first speculum (33) and the second speculum (35) intersection area, first closes beam
Mirror (36) is parallel with the first beam splitter (31), and the transmission of the first light combination mirror (36) and reflection beam splitting ratio are 50:50, first closes beam
The combined beam light direction of mirror (36) is sequentially placed the first optical filter (37), the first imaging len (38) and the first infra-red imaging array
(39), the first infra-red imaging array (39) is positioned on the focal plane of the first imaging len (38), the first speculum (33) and
Two-mirror (35) is in small angle with the first beam splitter (31) so that the absorption light of the first speculum (33) reflection is first
The right half of imaging of infra-red imaging array (39), the reference light of the second speculum (35) reflection is in the first infra-red imaging array (39)
Left half of imaging；The first effective air chamber length for absorbing molecule bubble (32) is 4cm, and the CO gases of 0.1atm are filled in bubble, the
Effective air chamber length that one reference molecule steeps (34) is 4cm, and the N2 gases of 1atm are filled in bubble；In first optical filter (37)
Cardiac wave is 4.76 μm a length of, 0.1 μm of transmitted spectrum bandwidth, transmits the spectrum that spectral pattern is the first filter transmission；
Second channel molecule optical filtering imaging detection component (4) is anti-by the second beam splitter (41), the second absorption molecule bubble (42), third
Penetrate mirror (43), the second reference molecule bubble (44), the 4th speculum (45), the second light combination mirror (46), the second optical filter (47), second
Imaging len (48) and the second infra-red imaging array (49) composition；Second beam splitter (41) is positioned over the reflection of total beam splitter (2)
In light light path, and it is parallel with total beam splitter (2)；The second absorption molecule bubble is sequentially placed in second beam splitter (41) transmitted light light path
(42) and third speculum (43) the second reference molecule bubble (44) and the 4th speculum (45), are sequentially placed in reflected light light path；
The second light combination mirror (46) is placed in the reflected light light path of third speculum (43) and the 4th speculum (45) intersection area, second closes beam
Mirror (46) is parallel with the second beam splitter (41), and the transmission of the second light combination mirror (46) and reflection beam splitting ratio are 50:50, second closes beam
The combined beam light direction of mirror (46) is sequentially placed the second optical filter (47), the second imaging len (48) and the second infra-red imaging array
(49), the second infra-red imaging array (49) is positioned on the focal plane of the second imaging len (48), third speculum (43) and
Four speculums (45) are in small angle with the second beam splitter (41) so that the absorption light of the second speculum (43) reflection is second
The right half of imaging of infra-red imaging array (49), the reference light of the 4th speculum (45) reflection is in the second infra-red imaging array (49)
Left half of imaging；The second effective air chamber length for absorbing molecule bubble (42) is 4cm, and the CO gases of 0.3atm are filled in bubble；The
Effective air chamber length that two reference molecules steep (44) is 4cm, and the N of 1atm is filled in bubble2Gas, in the second optical filter (47)
Cardiac wave is 4.9 μm a length of, 0.1 μm of transmitted spectrum bandwidth, transmits the spectrum that spectral pattern is the second filter transmission；
Data processing is with image-display units (5) by image data acquiring module (51), image data processing module (52) and figure
As display module (53) forms；The image data output end of first infra-red imaging array (39) and the second infra-red imaging array (49)
It is connected respectively to the data input pin of image data acquiring module (51), the data output end of image data acquiring module (51) connects
It is connected to the data input pin of image data processing module (52), the data output end of image data processing module (52) is connected to figure
As the data input pin of display module (53).
2. a kind of imaging type combustion measurement device based on binary channels molecule optical filtering technique according to claim 1, special
Sign is that Galilean type telescope or keplerian telescope or Newtonian telescope, telescope can be used in the telescope
Reception spectrum cover 4~5 μm.
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