CN109085152A - A kind of multichannel optical fiber formula gas Raman scatterometry system - Google Patents
A kind of multichannel optical fiber formula gas Raman scatterometry system Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 171
- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 64
- 239000000835 fiber Substances 0.000 claims abstract description 112
- 238000003384 imaging method Methods 0.000 claims abstract description 65
- 238000002485 combustion reaction Methods 0.000 claims abstract description 50
- 230000003287 optical effect Effects 0.000 claims abstract description 49
- 238000001237 Raman spectrum Methods 0.000 claims abstract description 40
- 241000931526 Acer campestre Species 0.000 claims abstract description 28
- 108091006146 Channels Proteins 0.000 claims description 183
- 101000694017 Homo sapiens Sodium channel protein type 5 subunit alpha Proteins 0.000 claims description 35
- 230000005284 excitation Effects 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims 1
- 210000001367 artery Anatomy 0.000 claims 1
- 238000007747 plating Methods 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 16
- 241000894007 species Species 0.000 abstract description 13
- 230000002269 spontaneous effect Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000003595 spectral effect Effects 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241001067739 Lotis Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002356 laser light scattering Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 230000001052 transient effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
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Abstract
A kind of multichannel optical fiber formula gas Raman scatterometry system category laser diagnostics in combustion field, Optical Maser System in the present invention, Raman spectrum imaging system, 10 channel fiber coupled systems, TT&C system, 45 degree of laser mirrors, laser condensing lens and laser collector set same optical platform, Optical Maser System sets 45 degree of laser mirror dead asterns, laser condensing lens set 45 degree of laser mirror front-rights, combustion zone front-left, laser collector sets combustion zone front-right, Raman spectrum imaging system II sets Optical Maser System front-right, 10 channel fiber coupled systems set Raman spectrum imaging system front-right, combustion zone dead astern, TT&C system IV sets 10 channel fiber coupled system rears；The laser spontaneous vibration Raman spectrum line imaging of Dynamic Burning field gaseous species can be achieved, it can be achieved that the molar fraction of Dynamic Burning field gaseous species and the high-precision fixed measurement of regional temperature in the present invention.
Description
Technical field
The invention belongs to laser diagnostics in combustion fields, and in particular to a kind of multichannel optical fiber formula gas Raman scatterometry
System.
Background technique
High-efficiency cleaning safe combustion is important one of the research topic of the mankind.Either in engine (including aerospace
Engine, communications and transportation engine etc.), in the coal measures system and gas turbine of power supply heat supply, or in all kinds of of basic research
Burning in burner requires to explore combustion mechanism by various advanced combustion diagnosis technological means and further improve
The approaches and methods of combustion position.Due to the closure of some combustion systems (burning in such as IC engine cylinder), transient state, explosion
The problems such as abominable, people generally detect combustion process using various laser diagnostics in combustion at present.Pass through these technologies
It can be directly observed combustion field combustion state, realize that combustion field temperature, component and concentration of component, mobility and flame structure are contour
The precise measurement of time-space resolution provides experimental verification for Theory of Combustion numerical simulation calculation.
By laser spontaneous vibrational Raman scattering species spectral measurement, the dominant species under complicated burning situation may be implemented
Concentration (molar fraction) and regional temperature detection, and there is untouchable, the several species measurement synchronism, quantitative of measurement
Property, time (nanosecond) and space (grade) resolution capability.At present it have been widely used for as in engine combustion room or
In various combustion systems under certain closing or atmospheric environment.There is gaseous species (nitrogen, oxygen of Raman active by synchro measure
Gas, carbon dioxide, hydrocarbon fuel, hydrogen, carbon monoxide etc.) spontaneous vibration Stokes Raman spectral signal, to obtain gas
Body molar fraction, and by the spontaneous vibration Stokes and anti stokes raman spectrum signal of nitrogen, to obtain local space
On temperature.These optical measurements and numerical simulation calculation result are verified and are supplemented mutually, are Theory of Combustion and burning examination
Offer basic data is provided.
But since there are system knots for combustion system (burning such as in the optical engine cylinder in engine test rack)
Structure complexity, bad environments, lab space are limited, arrangement optical imaging system is difficult, space interference of stray light is big and exist mechanical
Many unfavorable factors such as vibration are arranged when causing to measure gas Raman scattered signal in Dynamic Burning field by optical device
Space limitation, the influence of interference of stray light and body vibration and higher time-space resolution ability and bigger gaseous state cannot be obtained
The signal-to-noise ratio of Raman signal.Due to the random fluctuation of the spatial position of actual measurement, and cannot get surveying in accurate Dynamic Burning
Gas Raman scattered signal on amount point or line or face, optical measurements are also just difficult opposite with numbered analog simulation result
It answers.
Summary of the invention
The purpose of the present invention is to provide a kind of gaseous state Raman diffused lights using fiber optic conduction to collect optical system come complete
At the accurate quantification measurement gas molar score based on laser spontaneous vibrational Raman scattering realized in complicated Dynamic Burning field and
Regional temperature measuring technique.By a multichannel optical fiber sensor, straight line close arrangement is pressed respectively at its input and output both ends
10 road optical fiber are arranged, wherein the front of one end is equipped with a collection mirror and constitutes input terminal, and fastens with the combustion system of vibration
Connection guarantees input terminal and the combustion system synchronous vibration of the optical fiber, eliminates influence of the body vibration to measurement position；The other end
For output end, it carried out with two panels collimating mirror it is optical coupled, via being collimated to spectrograph slit after a piece of Excitation Filter with High.
Gaseous species Raman spectrum imaging signal is finally obtained on Raman ICCD camera, to realize mixed under the environment of Dynamic Burning field
Close the spectral detection of gas molar score and regional temperature.
The present invention is by Optical Maser System I, Raman spectrum imaging system II, 10 channel fiber coupled systems III, TT&C system
IV, 45 degree of laser mirrors 1, laser condensing lens 2, combustion zone 3 and laser collector 4 form, Optical Maser System I, Raman spectrum
Imaging system II, 10 channel fiber coupled systems III, IV, 45 degree of laser mirror 1 of TT&C system, laser condensing lens 2 and laser
Collector 4 is placed on same optical platform, and the plated film working faces of 45 degree of laser mirrors 1 is towards positive right back, Optical Maser System I
It is placed in the dead astern of 45 degree of laser mirrors 1, laser condensing lens 2 are placed in the front-right of 45 degree of laser mirrors 1, combustion zone 3
Front-left, laser collector 4 are placed in the front-right of combustion zone 3, and Raman spectrum imaging system II is placed in the positive right side of Optical Maser System I
Side, 10 channel fiber coupled systems III are placed in the dead astern of the front-right of Raman spectrum imaging system II, combustion zone 3, observing and controlling system
System IV is placed in the right at the rear of 10 channel fiber coupled systems III, Raman spectrum imaging system II；The laser of Optical Maser System I
Intersect the center of the plated film working face of device center line 5 and 45 degree laser mirror 1；Light in 10 channel fiber coupled systems III
Fibre input end adapter 21 and scattering light, which collect mirror 23, has same axial direction horizontal center line IV 24, axial horizontal center line IV
24 intersect vertically with the lines of centres of laser condensing lens 2 and laser collector 4, and optic fibre input end adapter 21 and scattering light are collected
On the metal shell body for the combustion system that mirror 23 is fixed in outside combustion zone 3 by mirror holder and magnetic force clamper；Fiber-optic output
The axial horizontal center line V 25 of adapter 26 intersects with the center of the plated film working face of scattering light reflection mirror II 28, and and its
Axial I 15 one-tenth 45 degree of angles of horizontal center line scatter the axial horizontal center line III 19 and Excitation Filter with High 16 of light reflection mirror I 18
Axial II 17 one-tenth 22.5 degree of angles of horizontal center line；10 channels of 10 channel fiber input terminals 22 in 10 channel fiber coupled systems III
The direction arranged in a straight line of optical fiber output port, 10 channel light parallel with the line of centres of laser condensing lens 2 and laser collector 4
The direction arranged in a straight line of 10 channel fiber output ports of 10 channel fiber output ends 27 and Raman spectrum in fine coupled system III
The short transverse of slit 13 is parallel on imaging spectrometer 14 in imaging system II, and slit 13 is located at 10 channel fiber coupled systems
The front-left of Excitation Filter with High 16 in III.
I g of pulse output end mouth of digital delay impulse generator 33 is through private cable and Raman spectrum in TT&C system IV
The external trigger input port d connection of Raman ICCD camera 11 in imaging system II；Digital delay pulse generation in TT&C system IV
Pumping lamp external trigger input terminal of II h of pulse output end mouth of device 33 through laser controller 7 in private cable and Optical Maser System I
Mouth a connection；The external trigger output port c of Raman ICCD camera 11 is through private cable and laser in Raman spectrum imaging system II
The Q-switch external trigger input port b connection of laser controller 7 in system I；Raman ICCD camera in Raman spectrum imaging system II
11 data-out port e is connect through private cable with the data-in port f of data collecting card 30 in TT&C system IV.
The Optical Maser System I is by laser private cable 6, laser controller 7, laser emitter 8, zero-th order waveplates 9
It is formed with laser pulse stretcher 10, laser controller 7, laser emitter 8, zero-th order waveplates 9 and laser pulse stretcher 10 are certainly
Afterwards to being before arranged successively, the laser exit center of laser emitter 8, the center of zero-th order waveplates 9 and laser pulse stretcher 10
The line at laser exit center is filters center line 5；Laser controller 7 passes through laser private cable 6 and laser emitter 8
Connection；Laser controller 7 is equipped with pumping lamp external trigger input port a and Q-switch external trigger input port b.
The Raman spectrum imaging system II is made of Raman ICCD camera 11, adapter 12, imaging spectrometer 14, is drawn
From rear to being before arranged successively, Raman ICCD camera 11 passes through adapter for graceful ICCD camera 11, adapter 12 and imaging spectrometer 14
12 is affixed with imaging spectrometer 14；Imaging spectrometer 14 is equipped with the slit 13 of Raman diffused light input, the height side of slit 13
To consistent with the space axis direction of CCD in Raman ICCD camera 11；Raman ICCD camera 11 be equipped with external trigger output port c,
External trigger input port d and data-out port e.
The 10 channel fiber coupled systems III by Excitation Filter with High 16, scattering light reflection mirror I 18, optical fiber cable 20,
Optic fibre input end adapter 21,10 channel fiber input terminals 22, scattering light collect mirror 23, optical fiber output end adapter 26,10 leads to
Road fiber-optic output 27 and scattering light reflection mirror II 28 form, wherein scattering light reflection mirror II 28 is being placed in Excitation Filter with High 16 just
Front, and its plated film working face is towards front-right；Before optical fiber output end adapter 26 is placed in the positive right side of scattering light reflection mirror II 28
Side, and 10 channel fiber output ends thereon are towards positive left back；Scattering light reflection mirror I 18 is placed in the positive right side of Excitation Filter with High 16
Side, scatters the plated film working face of light reflection mirror I 18 towards left front, and the plated film working face of Excitation Filter with High 16 is towards front-right；
10 channel fiber input terminals 22 on optic fibre input end adapter 21 are towards front；Optic fibre input end adapter 21 passes through optical fiber
Optical cable 20 is connected to optical fiber output end adapter 26；The end face of optic fibre input end adapter 21 and optical fiber output end adapter 26 point
Not She You 10 channel fiber of channel fiber input terminal 22 and 10 output end, 27,10 channel fiber input terminal 22 towards front, 10
Channel fiber output end 27 is towards positive left back.
10 channel fiber input terminals 22 are by 1 input port 1b of optical-fibre channel, 2 input port 2b of optical-fibre channel, optical-fibre channel 3
Input port 3b, 4 input port 4b of optical-fibre channel, 5 input port 5b of optical-fibre channel, 6 input port 6b of optical-fibre channel, optical fiber are logical
7 input port 7b of road, 10 input port 10b of 8 input port 8b of optical-fibre channel, 9 input port 9b of optical-fibre channel and optical-fibre channel
Composition.
10 channel fiber output ends 27 are by 1 output port 1a of optical-fibre channel, 2 output port 2a of optical-fibre channel, optical-fibre channel 3
Output port 3a, 4 output port 4a of optical-fibre channel, 5 output port 5a of optical-fibre channel, 6 output port 6a of optical-fibre channel, optical fiber are logical
7 output port 7a of road, 10 output port 10a of 8 output port 8a of optical-fibre channel, 9 output port 9a of optical-fibre channel and optical-fibre channel
Composition.
1 input port 1b of optical-fibre channel corresponds to the both ends that 1 input port 1b of optical-fibre channel is an optical fiber, and so on,
10 input port 10b of optical-fibre channel corresponds to 10 output port 10a of optical-fibre channel, is two ports of an optical fiber.
1 input port 1b of optical-fibre channel, 2 input port 2b ... of optical-fibre channel are with 10 input port 10b's of optical-fibre channel
The line of centres constitutes the radial centre lines II 35 of optic fibre input end adapter 21, and is parallel to laser condensing lens 2 and laser collection
The line of centres of device 4；1 I/O port 1a of optical-fibre channel, 2 output port 2a of optical-fibre channel ... and 10 output end of optical-fibre channel
The center line of mouth 10a constitutes the radial centre lines I 34 of optical fiber output end adapter 26, and is parallel to narrow in imaging spectrometer 14
The short transverse of seam 13；The line of centres that optic fibre input end adapter 21 and scattering light collect mirror 23 constitutes axial horizontal center line
Ⅳ24；Scattering light reflection mirror II 28 and scattering the line of centres of light reflection mirror I 18 is center line 29；Optical fiber output end adapter
26 axial horizontal center line V 25 intersects with the center of the plated film working face of scattering light reflection mirror II 28, scatters light reflection mirror II
28 axial horizontal center line I 15 respectively with the axial horizontal center line V 25 of optical fiber output end adapter 26 and the line of centres 29
At α angle, α is 45 degree；The line of centres of Excitation Filter with High 16 and scattering light reflection mirror I 18 constitutes axial horizontal center line II 17,
Axial horizontal center line II 17 is parallel to axial horizontal center line I 15, axial horizontal center line III 19 respectively with the line of centres 29
At angle β with axial horizontal center line II 17, β is 22.5 degree；Optical fiber cable 20 is bent the angle less than 90 degree.
The TT&C system IV is by data collecting card 30, industrial personal computer 31, display 32 and digital delayed-pulse generator
33 compositions, wherein data collecting card 30 is equipped with data-in port f, and digital delay impulse generator 33 is exported equipped with pulse
II h of I g of port and pulse output end mouth, display 32 are placed on industrial personal computer 31, industrial personal computer 31 and digital delayed-pulse generator 33
It is arranged by left and right sequence.
The present invention is by the optical coupled technology between multichannel optical fiber and Raman spectrometer slit, it can be achieved that Dynamic Burning
The laser spontaneous vibration Raman spectrum line imaging of field gaseous species, avoids the mechanical oscillation of combustion system to optics in the measurements
The influence of measurement, the stray light avoided are simply saved to the interference of weak gaseous state Raman diffused light and with spectral collection system is built
The advantages that save space, the molar fraction of final achievable Dynamic Burning field gaseous species and the high-precision fixed measurement of regional temperature
Amount.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multichannel optical fiber formula gas Raman scatterometry system
Fig. 2 is the structural schematic diagram of Optical Maser System I
Fig. 3 is the structural schematic diagram of Raman spectrum imaging system II
Fig. 4 is the structural schematic diagram of 10 channel fiber coupled systems III
Fig. 5 is the structural schematic diagram of data collecting card, industrial personal computer, display in TT&C system IV
Fig. 6 is the structural schematic diagram of digital delay impulse generator in TT&C system IV
Fig. 7 is the structural schematic diagram of 10 channel fiber sensors
Fig. 8 is signal timing sequence diagram
Wherein: I, Optical Maser System, II, Raman spectrum imaging system, III .10 channel fiber coupled system, IV, observing and controlling system
1.45 degree of 2. laser condensing lens of laser mirror, 3. combustion zone, 4. laser collector, 5. filters center line, 6. laser of system
10. laser pulse stretcher of device private cable 7. laser controller, 8. laser emitter, 9. zero-th order waveplates, 11. Raman ICCD
The axial horizontal center line of 14. imaging spectrometer of camera 12. adapter, 13. slit 15. I 16. Excitation Filter with High 17. is axial
It is suitable that horizontal center line II 18. scatters the axial horizontal center line of light reflection mirror I 19. III 20. optical fiber cable, 21. optic fibre input ends
22.10 channel fiber input terminal 23. of orchestration scatters light and collects the axial horizontal centre of the axial horizontal center line IV 25. of mirror 24.
V 26. optical fiber output end adapter of line, 27.10 channel fiber output end 28. scatters II 29. line of centres of light reflection mirror
30. 34. radial centre lines of data collecting card 31. industrial personal computer, 32. display, 33. digital delay impulse generator, I 35. diameter
To outside II a. pumping lamp external trigger input port b.Q of center line switch external trigger input port c. external trigger output port d.
Trigger I h. pulse output end mouth II of input port e. data-out port f. data-in port g. pulse output end mouth
1 output port 2a. optical-fibre channel of 1a. optical-fibre channel, 2 output port 3a. optical-fibre channel, 3 output port 4a. optical-fibre channels 4 are defeated
5 output port 6a. optical-fibre channel of exit port 5a. optical-fibre channel, 6 output port 7a. optical-fibre channel, 7 output port 8a. optical fiber
1 input terminal of channel 8 output port 9a. optical-fibre channel, 9 output port 10a. optical-fibre channel, 10 output port 1b. optical-fibre channel
3 input port 4b. optical-fibre channel of mouth 2b. 2 input port 3b. optical-fibre channel of optical-fibre channel, 4 input port 5b. optical-fibre channel
5 input port 6b. optical-fibre channel, 6 input port 7b. optical-fibre channel, 7 input port 8b. optical-fibre channel, 8 input port 9b.
9 input port 10b. optical-fibre channel of optical-fibre channel, 10 input port
Specific embodiment
The description present invention with reference to the accompanying drawing.
As shown in Figure 1, by Optical Maser System I, Raman spectrum imaging system II, 10 channel fiber coupled systems III, observing and controlling
IV, 45 degree of laser mirror 1 of system, laser condensing lens 2, combustion zone 3 and laser collector 4 form, Optical Maser System I, Raman
Spectrum imaging system II, 10 channel fiber coupled systems III, IV, 45 degree of laser mirror 1 of TT&C system, 2 and of laser condensing lens
Laser collector 4 is placed on same optical platform, and the plated film working faces of 45 degree of laser mirrors 1 is towards positive right back, laser
System I is placed in the dead astern of 45 degree of laser mirrors 1, and laser condensing lens 2 are placed in the front-right of 45 degree of laser mirrors 1, burning
The front-left in area 3, laser collector 4 are placed in the front-right of combustion zone 3, and Raman spectrum imaging system II is placed in Optical Maser System I
Front-right, 10 channel fiber coupled systems III are placed in the dead astern of the front-right of Raman spectrum imaging system II, combustion zone 3,
TT&C system IV is placed in the right at the rear of 10 channel fiber coupled systems III, Raman spectrum imaging system II；Optical Maser System I
The center of plated film working face of filters center line 5 and 45 degree laser mirror 1 intersect；10 channel fiber coupled systems III
In optic fibre input end adapter 21 and scattering light collect mirror 23 there is same axial direction horizontal center line IV 24, in axial level
Heart line IV 24 and the line of centres of laser condensing lens 2 and laser collector 4 intersect vertically, optic fibre input end adapter 21 and scattering
On the metal shell body for the combustion system that light collection mirror 23 is fixed in outside combustion zone 3 by mirror holder and magnetic force clamper；Optical fiber
The axial horizontal center line V 25 for exporting end adapter 26 intersects with the center of the plated film working face of scattering light reflection mirror II 28,
And with its I 15 one-tenth 45 degree of angle of axial horizontal center line, the axial horizontal center line III 19 and laser for scattering light reflection mirror I 18 filter
17 one-tenth 22.5 degree of angles of axial horizontal center line II of piece 16；10 channel fiber input terminals 22 in 10 channel fiber coupled systems III
The direction arranged in a straight line of 10 channel fiber output ports, it is parallel with the line of centres of laser condensing lens 2 and laser collector 4,10
The direction arranged in a straight line of 10 channel fiber output ports of 10 channel fiber output ends 27 and drawing in channel fiber coupled system III
The short transverse of slit 13 is parallel on imaging spectrometer 14 in graceful spectrum imaging system II, and slit 13 is located at 10 channel fiber couplings
The front-left of Excitation Filter with High 16 in collaboration system III.
I g of pulse output end mouth of digital delay impulse generator 33 is through private cable and Raman spectrum in TT&C system IV
The external trigger input port d connection of Raman ICCD camera 11 in imaging system II；Digital delay pulse generation in TT&C system IV
Pumping lamp external trigger input terminal of II h of pulse output end mouth of device 33 through laser controller 7 in private cable and Optical Maser System I
Mouth a connection；The external trigger output port c of Raman ICCD camera 11 is through private cable and laser in Raman spectrum imaging system II
The Q-switch external trigger input port b connection of laser controller 7 in system I；Raman ICCD camera in Raman spectrum imaging system II
11 data-out port e is connect through private cable with the data-in port f of data collecting card 30 in TT&C system IV.
As shown in Fig. 2, the Optical Maser System I by laser private cable 6, laser controller 7, laser emitter 8,
Zero-th order waveplates 9 and laser pulse stretcher 10 form, laser controller 7, laser emitter 8, zero-th order waveplates 9 and laser pulse exhibition
Wide device 10 is extremely before arranged successively from rear, the laser exit center of laser emitter 8, the center of zero-th order waveplates 9 and laser pulse exhibition
The line at the laser exit center of wide device 10 is filters center line 5；Laser controller 7 is by laser private cable 6 and swashs
Optical transmitting set 8 connects；Laser controller 7 is equipped with pumping lamp external trigger input port a and Q-switch external trigger input port b.
As shown in figure 3, the Raman spectrum imaging system II is by Raman ICCD camera 11, adapter 12, imaging spectral
Instrument 14 forms, and Raman ICCD camera 11, adapter 12 and imaging spectrometer 14 are extremely before arranged successively from rear, Raman ICCD camera 11
It is affixed by adapter 12 and imaging spectrometer 14；Imaging spectrometer 14 is equipped with the slit 13 of Raman diffused light input, slit
13 short transverse is consistent with the space axis direction of CCD in Raman ICCD camera 11；Raman ICCD camera 11 is equipped with external trigger
Output port c, external trigger input port d and data-out port e.
As illustrated in figures 4 and 7, the 10 channel fiber coupled systems III are by Excitation Filter with High 16, scattering light reflection mirror I
18, optical fiber cable 20, optic fibre input end adapter 21,10 channel fiber input terminals 22, scattering light collect mirror 23, fiber-optic output
Adapter 26,10 channel fiber output ends 27 and scattering light reflection mirror II 28 form, wherein scattering light reflection mirror II 28 be placed in it is sharp
The front of light optical filter 16, and its plated film working face is towards front-right；Optical fiber output end adapter 26 is placed in scattering light reflection
The positive right front of mirror II 28, and 10 channel fiber output ends thereon are towards positive left back；Scattering light reflection mirror I 18 is placed in laser
The front-right of optical filter 16 scatters the plated film working face of light reflection mirror I 18 towards left front, and the plated film of Excitation Filter with High 16 works
Facing towards front-right；10 channel fiber input terminals 22 on optic fibre input end adapter 21 are towards front；Optic fibre input end is suitable
Orchestration 21 is connected to optical fiber output end adapter 26 by optical fiber cable 20；Optic fibre input end adapter 21 and fiber-optic output are suitable
The end face of orchestration 26 is respectively equipped with 10 channel fiber of channel fiber input terminal 22 and 10 output end, 27,10 channel fiber input terminal 22
Towards front, 10 channel fiber output ends 27 are towards positive left back.
10 channel fiber input terminals 22 are by 1 input port 1b of optical-fibre channel, 2 input port 2b of optical-fibre channel, optical-fibre channel 3
Input port 3b, 4 input port 4b of optical-fibre channel, 5 input port 5b of optical-fibre channel, 6 input port 6b of optical-fibre channel, optical fiber are logical
7 input port 7b of road, 10 input port 10b of 8 input port 8b of optical-fibre channel, 9 input port 9b of optical-fibre channel and optical-fibre channel
Composition.
10 channel fiber output ends 27 are by 1 output port 1a of optical-fibre channel, 2 output port 2a of optical-fibre channel, optical-fibre channel 3
Output port 3a, 4 output port 4a of optical-fibre channel, 5 output port 5a of optical-fibre channel, 6 output port 6a of optical-fibre channel, optical fiber are logical
7 output port 7a of road, 10 output port 10a of 8 output port 8a of optical-fibre channel, 9 output port 9a of optical-fibre channel and optical-fibre channel
Composition.
1 input port 1b of optical-fibre channel corresponds to the both ends that 1 input port 1b of optical-fibre channel is an optical fiber, and so on,
10 input port 10b of optical-fibre channel corresponds to 10 output port 10a of optical-fibre channel, is two ports of an optical fiber.
1 input port 1b of optical-fibre channel, 2 input port 2b ... of optical-fibre channel are with 10 input port 10b's of optical-fibre channel
The line of centres constitutes the radial centre lines II 35 of optic fibre input end adapter 21, and is parallel to laser condensing lens 2 and laser collection
The line of centres of device 4；1 I/O port 1a of optical-fibre channel, 2 output port 2a of optical-fibre channel ... and 10 output end of optical-fibre channel
The center line of mouth 10a constitutes the radial centre lines I 34 of optical fiber output end adapter 26, and is parallel to narrow in imaging spectrometer 14
The short transverse of seam 13；The line of centres that optic fibre input end adapter 21 and scattering light collect mirror 23 constitutes axial horizontal center line
Ⅳ24；Scattering light reflection mirror II 28 and scattering the line of centres of light reflection mirror I 18 is center line 29；Optical fiber output end adapter
26 axial horizontal center line V 25 intersects with the center of the plated film working face of scattering light reflection mirror II 28, scatters light reflection mirror II
28 axial horizontal center line I 15 respectively with the axial horizontal center line V 25 of optical fiber output end adapter 26 and the line of centres 29
At α angle, α is 45 degree；The line of centres of Excitation Filter with High 16 and scattering light reflection mirror I 18 constitutes axial horizontal center line II 17,
Axial horizontal center line II 17 is parallel to axial horizontal center line I 15, axial horizontal center line III 19 respectively with the line of centres 29
At angle β with axial horizontal center line II 17, β is 22.5 degree；Optical fiber cable 20 is bent the angle less than 90 degree.
As shown in Figure 5 and Figure 6, the TT&C system IV is by data collecting card 30, industrial personal computer 31, display 32 and number
Delayed-pulse generator 33 forms, and wherein data collecting card 30 is equipped with data-in port f, digital delay impulse generator 33
It is equipped with II h of I g of pulse output end mouth and pulse output end mouth, display 32 is placed on industrial personal computer 31, and industrial personal computer 31 and number are prolonged
Slow impulse generator 33 is arranged by left and right sequence.
Specific connection procedure and requirement of the invention is as follows:
By Optical Maser System I, Raman spectrum imaging system II, 10 channel fiber coupled systems III, observing and controlling system in the present invention
IV, 45 degree of laser mirror 1 of system, laser condensing lens 2 and laser collector 4 are placed in same optical platform.Laser condensing lens 2,
Laser collector 4 and scattering light, which are collected, arranges combustion system between mirror 23, so that combustion zone to be measured 3 is located at laser condensing lens 2
Front-right, the front-left of laser collector 4 and scattering light collect mirror 23 front.
Laser controller 7, laser emitter 8, zero-th order waveplates 9 and laser pulse stretcher 10 are put from rear be extremely before arranged successively
It is placed in the dead astern of 45 degree of laser mirrors 1；45 degree of 1 plated film working faces of laser mirror are towards positive right back；45 degree of laser are anti-
The center of mirror 1, laser condensing lens 2 and laser collector 4 is penetrated on a straight line from left to right.
Scattering light reflection mirror II 28 is placed in the front of Excitation Filter with High 16, and its plated film working face is towards front-right.Light
Fibre output end adapter 26 is placed in the positive right front of scattering light reflection mirror II 28, and 10 channel fiber output ends thereon are towards just
Left back.Scattering light reflection mirror I 18 is placed in the front-right of Excitation Filter with High 16, scatters the plated film working face court of light reflection mirror I 18
To left front, the plated film working face of Excitation Filter with High 16 is towards front-right.10 channel fibers on optic fibre input end adapter 21
Input terminal 22 is towards front.Optic fibre input end adapter 21 is connected to optical fiber output end adapter 26 by optical fiber cable 20.
10 channel fiber input terminals 22 are towards front, and 10 channel fiber output ends 27 are towards positive left back.Optic fibre input end adapter
21 radial centre lines II 35, and it is parallel to 45 degree of laser mirrors 1, laser condensing lens 2 and laser collector 4 from left to right
Center line；The radial centre lines I 34 of optical fiber output end adapter 26, and the slit 13 being parallel in imaging spectrometer 14
Short transverse.Axial horizontal center line IV 24 respectively with radial centre lines II 35 and 45 degree laser mirror 1, laser condensing lens
2 and the line at center from left to right of laser collector 4 intersect vertically.The axial horizontal centre of optical fiber output end adapter 26
Line V 25 intersects with the center of the plated film working face of scattering light reflection mirror II 28, and the axial direction with scattering light reflection mirror II 28 respectively
Horizontal center line I 15 and the line of centres 29 are at 45 degree；Axial horizontal center line II 17 is parallel to axial horizontal center line I 15, axis
To horizontal center line III 19 respectively with the line of centres 29 and axial II 17 one-tenth 22.5 degree of horizontal center line.Optical fiber cable 20 can be curved
Angle of the song less than 90 degree.Optic fibre input end adapter 21 and scattering light are collected mirror 23 and are affixed to by mirror holder and magnetic force clamper
On the metal shell body of combustion system outside combustion zone 3.
It is separately connected with private cable: I g of pulse output end mouth of digital delay impulse generator 33 to Raman spectrum imaging
The external trigger input port d of Raman ICCD camera 11 in system II；II h of pulse output end mouth of digital delay impulse generator 33
The pumping lamp external trigger input port a of laser controller 7 into Optical Maser System I；Raman in Raman spectrum imaging system II
The Q-switch external trigger input port b of the external trigger output port c of ICCD camera 11 laser controller 7 into Optical Maser System I；
The data-out port e of Raman ICCD camera 11 data collecting card 30 into TT&C system IV in Raman spectrum imaging system II
Data-in port f.
Each optical device centre-height of first successive step: each knob position by adjusting mirror holder instrument base, so that laser
Transmitter 8, zero-th order waveplates 9,10,45 degree of laser mirrors 1 of laser pulse stretcher, laser condensing lens 2, combustion zone 3, laser are received
Storage 4, Excitation Filter with High 16, scattering light reflection mirror I 18, optic fibre input end adapter 21, dissipates the slit 13 of imaging spectrometer 14
It penetrates light and collects mirror 23, optical fiber output end adapter 26 and scattering II 28 center of light reflection mirror in same level；By adjusting
So that a each axially and radially horizontal center line is on foregoing position and angle.
All appts equipment is powered and preheats, and each instrument knob position is arranged, and each measurement parameter of instrument is inputted, into industry control
Primary control program on machine 31.
Accurately adjust each optical device center various dimensions position: control laser emitter 8 is emitted the low energy of debugging
532nm (nanometer) visible light original laser beam k passes through the real time imagery functional mode of Raman ICCD camera 11, synchro measure combustion
Burn the laser signal in area 3.Height, left and right and front-rear position, inclination angle and the pitching for finely tuning all devices and mirror holder, guarantee display
Laser real image is shown as on device 32, and on the screen of display 32 vertically or horizontally.
Measurement Dynamic Burning field in gaseous species laser spontaneous vibrational Raman scattering spectrum: by combustion zone 3 be adjusted to
Under the pressure of survey, temperature and concentration of component；It will be under laser emitter 8 and the setting of Raman ICCD camera 11 to measurement functional mode；
Control the original laser beam k that laser emitter 8 is emitted certain experiment energy mJ (millijoule)；According to signal synchronous sequence shown in Fig. 7,
It is completed to collect each species Raman diffused light that mirror 23 is collected by scattering light on combustion zone 3 by the main program in industrial personal computer 31, and
It is imaged in 11 polishing wax of Raman ICCD camera, is calculated by main program, finally calculate each species under this experiment condition
Molar fraction and regional temperature value.
Embodiment:
As shown in Figure 1, selecting the PS2225 type laser controller of Byelorussia LOTIS TII company in Optical Maser System I
7, LS2137 type laser emitter 8,1/2 zero-th order waveplates 9 and independent research laser pulse stretcher 10, laser emitter 8 goes out
532nm (nanometer) original laser beam k is penetrated, outlet spot diameter is about 8mm (millimeter), and pulsewidth halfwidth (FWHM) is about 7ns
(nanosecond), frequency 10Hz, experiment output laser energy are 380mJ (millijoule), and peak power is 0.4GW (gigawatt)；Through zero passage
After grade wave plate 9, laser is changed polarization direction, and the polarization direction of the laser beam j after change is consistent with the short transverse of slit 13；
Laser beam i, FWHM after the output broadening of laser pulse stretcher 10 are about 35ns, spot diameter 6mm, frequency 10Hz,
Energy is 350mJ, peak power 0.02GW.Laser beam i is by 45 degree of incident angles to the center of 45 degree of laser mirrors 1
The heart, then 45 degree of angle of reflection are pressed, a laser beam is formed in combustion zone 3 after focal length is the laser condensing lens 2 of 500mm
Gaseous species in the deexcitation region can mainly generate Raman diffused light, fluorescence and laser light scattering light etc.；Homemade 10 channel
Fibre optical sensor collects inelastic Raman scattering light and elastic scattering laser after the completion of excitation；By 10 channel fiber coupled systemes
Excitation Filter with High 16 in system III filters out elastic scattering light, and gas Raman scattering light is only left on the slit of spectrometer 14
Signal.
Scattering light and collecting distance of the mirror 23 away from test section is 150mm, and scattering light collects the channel fiber input terminal of mirror 23 and 10
Away from for 200mm, every optical fiber effective diameter is 100 μm at 22 center, and away from be 120 μm, fiber-optic output is adapted at center between optical fiber
Device 26 and scattering light reflection mirror II 28 center away from be 50mm, scattering light reflection mirror II 28 and Excitation Filter with High 16 center away from for
The center of 50mm, Excitation Filter with High 16 and scattering light reflection mirror I 18 is away from for 200mm, the center of Excitation Filter with High 16 and slit 13
Away from for 0.8mm.
Excitation Filter with High 16 is that the NF01-532U-25 type Notch optical filter of Semrock company goes that 532nm wavelength is prevented to swash
Light scatters light；Imaging spectrometer 14 is the Surespectrum 500is/sm Imaging grating spectrometer of U.S. BRUKER company, choosing
600g/mm grating, slit height 3mm are selected, slit width is set as 350 μm, and outlet is equipped with Britain Andor company
The Raman ICCD camera 11 of the enhanced CCD of DH720-18F-03；Digital delay impulse generator 33 is U.S. STANFORD company
DG645 pulse daley generator；Grind one piece of Raman ICCD phase of insertion on the Intel mainboard in magnificent 610H type industrial personal computer 31 in Taiwan
The data collecting card 30 of machine 11.
As shown in Figure 8, in which: A is the signal output waveform of II h of I g of pulse output end mouth and pulse output end mouth；B is outer
The signal output waveform of trigger output end mouth c；C is the time domain waveform of original laser beam k；D is the time domain of the laser beam i after broadening
Waveform；E is raman spectral signal time domain waveform；F is to gate time domain waveform inside Raman ICCD camera 11.Setting A1 is 0.1s；
A, the frequency of B, C, D, E and F curve is 10Hz；B1 is 140 μm (microsecond)；F1 is 140.14ns (nanosecond)；F2 is 40ns.
Claims (5)
1. a kind of multichannel optical fiber formula gas Raman scatterometry system, it is characterised in that: by Optical Maser System (I), Raman light
Spectrum imaging system (II), 10 channel fiber coupled systems (III), TT&C system (IV), 45 degree of laser mirrors (1), laser focus
Mirror (2), combustion zone (3) and laser collector (4) composition, Optical Maser System (I), Raman spectrum imaging system (II), 10 channels
Fiber coupling system (III), TT&C system (IV), 45 degree of laser mirrors (1), laser condensing lens (2) and laser collector (4)
It is placed on same optical platform, the plated film working face of 45 degree of laser mirrors (1) towards positive right back, set by Optical Maser System (I)
In the dead astern of 45 degree of laser mirrors (1), laser condensing lens (2) are placed in the front-right of 45 degree of laser mirrors (1), combustion zone
(3) front-left, laser collector (4) are placed in the front-right of combustion zone (3), and Raman spectrum imaging system (II) is placed in laser
The front-right of system (I), 10 channel fiber coupled systems (III) are placed in the front-right of Raman spectrum imaging system (II), combustion zone
(3) dead astern, TT&C system (IV) are placed in the rear of 10 channel fiber coupled systems (III), Raman spectrum imaging system (II)
Right；The center of the plated film working face of the filters center line (5) and 45 degree of laser mirrors (1) of Optical Maser System (I)
Intersection；Optic fibre input end adapter (21) and scattering light in 10 channel fiber coupled systems (III) collect mirror (23) with same
In item axial direction horizontal center line IV (24), axial horizontal center line IV (24) and laser condensing lens (2) and laser collector (4)
Heart line intersects vertically, and optic fibre input end adapter (21) and scattering light collection mirror (23) are affixed by mirror holder and magnetic force clamper
In on the metal shell body of combustion zone (3) external combustion system；The axial horizontal center line of optical fiber output end adapter (26)
V (25) intersects with the center of plated film working face of scattering light reflection mirror II (28), and with its axial direction horizontal center line I (15)
At 45 degree of angles, scatter in the axial horizontal center line III (19) of light reflection mirror I (18) and the axial level of Excitation Filter with High (16)
Heart line II (17) is at 22.5 degree of angles；10 channel fibers of 10 channel fiber input terminals (22) in 10 channel fiber coupled systems (III)
The direction arranged in a straight line of output port, 10 channel light parallel with the line of centres of laser condensing lens (2) and laser collector (4)
The direction arranged in a straight line of 10 channel fiber output ports of 10 channel fiber output ends (27) and Raman in fine coupled system (III)
The short transverse of slit (13) is parallel on imaging spectrometer (14) in spectrum imaging system (II), and slit (13) is located at 10 channels
The front-left of Excitation Filter with High (16) in fiber coupling system III；Digital delay impulse generator (33) in TT&C system (IV)
External trigger of the pulse output end mouth I (g) through private cable and Raman ICCD camera (11) in Raman spectrum imaging system (II) is defeated
Inbound port (d) connection；The pulse output end mouth II (h) of digital delay impulse generator (33) is through Special electric in TT&C system (IV)
Cable is connect with the pumping lamp external trigger input port (a) of laser controller (7) in Optical Maser System (I)；Raman spectrum imaging system
The external trigger output port (c) of Raman ICCD camera (11) is through laser control in private cable and Optical Maser System (I) in system (II)
The Q-switch external trigger input port (b) of device (7) processed connects；Raman ICCD camera (11) in Raman spectrum imaging system (II)
Data-out port (e) is connect through private cable with the data-in port (f) of data collecting card (30) in TT&C system (IV).
2. multichannel optical fiber formula gas Raman scatterometry system according to claim 1, it is characterised in that: the laser
Device system (I) is by laser private cable (6), laser controller (7), laser emitter (8), zero-th order waveplates (9) and laser arteries and veins
Rush stretcher (10) composition, laser controller (7), laser emitter (8), zero-th order waveplates (9) and laser pulse stretcher (10)
It is extremely before arranged successively from rear, the laser exit center of laser emitter (8), the center of zero-th order waveplates (9) and laser pulse stretching
The line at the laser exit center of device (10) is filters center line (5)；Laser controller (7) passes through laser private cable
(6) it is connect with laser emitter (8)；Laser controller (7) is equipped with outside pumping lamp external trigger input port (a) and Q-switch and touches
It sends out input port (b).
3. multichannel optical fiber formula gas Raman scatterometry system according to claim 1, it is characterised in that: the Raman
Spectrum imaging system (II) is made of Raman ICCD camera (11), adapter (12), imaging spectrometer (14), Raman ICCD camera
(11), from rear to being before arranged successively, Raman ICCD camera (11) passes through adapter for adapter (12) and imaging spectrometer (14)
(12) affixed with imaging spectrometer (14)；Imaging spectrometer (14) is equipped with the slit (13) of Raman diffused light input, slit
(13) short transverse is consistent with the space axis direction of CCD in Raman ICCD camera (11)；Raman ICCD camera (11) is equipped with
External trigger output port (c), external trigger input port (d) and data-out port (e).
4. multichannel optical fiber formula gas Raman scatterometry system according to claim 1, it is characterised in that: described 10 are logical
Road fiber coupling system (III) is by Excitation Filter with High (16), scattering light reflection mirror I (18), optical fiber cable (20), optic fibre input end
Adapter (21), 10 channel fiber input terminals (22), scattering light collect mirror (23), optical fiber output end adapter (26), 10 channels
Fiber-optic output (27) and scattering light reflection mirror II (28) composition, wherein scattering light reflection mirror II (28) is placed in Excitation Filter with High
(16) front, and its plated film working face is towards front-right；Optical fiber output end adapter (26) is placed in scattering light reflection mirror II
(28) positive right front, and 10 channel fiber output ends thereon are towards positive left back；Scattering light reflection mirror I (18) is placed in laser
The front-right of optical filter (16) scatters the plated film working face of light reflection mirror I (18) towards left front, the plating of Excitation Filter with High (16)
Film working face is towards front-right；10 channel fiber input terminals (22) on optic fibre input end adapter (21) are towards front；Light
Fibre input end adapter (21) is connected to optical fiber output end adapter (26) by optical fiber cable (20)；Optic fibre input end adapter
(21) and the end face of optical fiber output end adapter (26) is respectively equipped with 10 channel fiber input terminals (22) and the output of 10 channel fibers
It holds (27), 10 channel fiber input terminals (22) are towards front, and 10 channel fiber output ends (27) are towards positive left back；10 channels
Optic fibre input end (22) is by 1 input port of optical-fibre channel (1b), 2 input port of optical-fibre channel (2b), 3 input port of optical-fibre channel
(3b), 4 input port of optical-fibre channel (4b), 5 input port of optical-fibre channel (5b), 6 input port of optical-fibre channel (6b), optical fiber are logical
7 input port of road (7b), 10 input terminal of 8 input port of optical-fibre channel (8b), 9 input port of optical-fibre channel (9b) and optical-fibre channel
Mouth (10b) composition；10 channel fiber output ends (27) are by 1 output port of optical-fibre channel (1a), 2 output port of optical-fibre channel
(2a), 3 output port of optical-fibre channel (3a), 4 output port of optical-fibre channel (4a), 5 output port of optical-fibre channel (5a), optical fiber are logical
6 output port of road (6a), 7 output port of optical-fibre channel (7a), 8 output port of optical-fibre channel (8a), 9 output port of optical-fibre channel
(9a) and 10 output port of optical-fibre channel (10a) composition；1 input port of optical-fibre channel (1b) corresponds to 1 input port of optical-fibre channel
(1b) is the both ends of an optical fiber, and so on, corresponding 10 output port of optical-fibre channel of 10 input port of optical-fibre channel (10b)
(10a) is two ports of an optical fiber；1 input port of optical-fibre channel (1b), 2 input port of optical-fibre channel (2b) ... and
The line of centres of 10 input port of optical-fibre channel (10b) constitutes the radial centre lines II (35) of optic fibre input end adapter (21),
And it is parallel to the line of centres of laser condensing lens (2) and laser collector (4)；1 I/O port of optical-fibre channel (1a), optical fiber are logical
2 output port of road (2a) ... and the center line of 10 output port of optical-fibre channel (10a) constitutes optical fiber output end adapter (26)
Radial centre lines I (34), and the short transverse for the slit (13) being parallel in imaging spectrometer (14)；Optic fibre input end adaptation
The line of centres that device (21) and scattering light collect mirror (23) constitutes axial horizontal center line IV (24)；It scatters light reflection mirror II (28)
The line of centres with scattering light reflection mirror I (18) is center line (29)；In the axial level of optical fiber output end adapter (26)
Heart line V (25) intersects with the center of the plated film working face of scattering light reflection mirror II (28), scatters the axial direction of light reflection mirror II (28)
Horizontal center line I (15) respectively with the axial horizontal center line V (25) of optical fiber output end adapter (26) and the line of centres (29)
At α angle, α is 45 degree；Excitation Filter with High (16) and the line of centres for scattering light reflection mirror I (18) constitute axial horizontal center line II
(17), axial horizontal center line II (17) is parallel to axial horizontal center line I (15), axial horizontal center line III (19) respectively with
The line of centres (29) and axial horizontal center line II (17) are at angle β, and β is 22.5 degree；Optical fiber cable (20) is bent less than 90 degree
Angle.
5. multichannel optical fiber formula gas Raman scatterometry system according to claim 1, it is characterised in that: the observing and controlling
System (IV) is made of data collecting card (30), industrial personal computer (31), display (32) and digital delayed-pulse generator (33),
Middle data collecting card (30) is equipped with data-in port (f), and digital delay impulse generator (33) is equipped with pulse output end
I (g) of mouth and pulse output end mouth II (h), display (32) are placed on industrial personal computer (31), industrial personal computer (31) and digital delay pulse
Generator (33) is arranged by left and right sequence.
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