CN109358010A - A kind of device and method for surveying haze main component using cell method in optical active fiber - Google Patents
A kind of device and method for surveying haze main component using cell method in optical active fiber Download PDFInfo
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- CN109358010A CN109358010A CN201811291161.5A CN201811291161A CN109358010A CN 109358010 A CN109358010 A CN 109358010A CN 201811291161 A CN201811291161 A CN 201811291161A CN 109358010 A CN109358010 A CN 109358010A
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- gas
- haze
- coupler
- main component
- light source
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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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
Abstract
The invention discloses a kind of device and methods that haze main component is surveyed using cell method in optical active fiber, the present invention polymerize haze by haze generator, haze gas loses activity after polymerization, pass through fibre optical sensor and Bragg grating again, specific gas in mixed gas is sensed, to measure corresponding gas concentration, the present invention can be realized Simultaneous Determination, and each measuring instrument does not need to correct instrument using standard film or calibrating gas, the gas in gas box need to only be changed every time, other measuring instruments do not need to correct, the purpose that feasible system key instrument is reused.
Description
Technical field
The invention belongs to fiber laser arrays fields, and in particular to a kind of to survey haze main component using cell method in optical active fiber
Device and method.
Background technique
The features such as optical fiber is affected by environment small due to inherently safe, easy networking, is answered extensively in more and more fields
With.The PM2.5 of one of air index often by the harassment of haze, is measured, also gradually in one to winter, Chinese north city
It is concerned by people.Tradition measurement PM2.5 is to allow the air of certain flow rate by cutter, under the action of aspiration pump, point
The particle of different-diameter is separated, then is measured concentration respectively.This measurement method can not achieve Simultaneous Determination gas each component
Concentration, and staff will also use standard film and calibrating gas to be modified, calibrate to all analyzers weekly.
Summary of the invention
Haze main component is surveyed using cell method in optical active fiber the purpose of the present invention is to overcome the above shortcomings and to provide a kind of
Device and method, not only may be implemented Simultaneous Determination, and each measuring instrument do not need using standard film or calibrating gas into
Row amendment, it is often more important that due to the features such as optical fiber is light-weight and easy networking, can the multiple measurement points of observation station selection simultaneously
Measurement.
In order to achieve the above object, a kind of device for surveying haze main component using cell method in optical active fiber, including haze
Generator and detection system；
Haze generator includes closed tank body, and gas access, anion entrance and gas vent are provided on tank body；
Detection system includes laser light source, and laser light source connects the first coupler, the first coupler connect pump light source and
Erbium-doped fiber, erbium-doped fiber connect optoisolator, several second couplers of isolator downstream tandem, and each second coupler connects
Corresponding fibre optical sensor is connect, fibre optical sensor connects Bragg grating, and fibre optical sensor and Bragg grating are located at gas box
Interior, Bragg grating connects space division multiplexing device, and space division multiplexing device connects spectrometer, and gas box connects gas vent；
The gas box temperature that space division multiplexing device monitors the external information that fibre optical sensor detects and Bragg grating
Variation, which is transmitted in spectrometer, to be shown, and combined data processing software can obtain gas box by observing image change
In corresponding gas concentration.
Gas inlet valves, anion inlet valve are respectively arranged on gas access, anion entrance and gas vent
And gas outlet valve.
Optoisolator is provided between Er-doped fiber and the second coupler.
Second coupler uses 1 × 2 coupler；
The central wavelength of all Bragg gratings is different.
A kind of working method of device that surveying haze main component using cell method in optical active fiber, comprising the following steps:
Haze gas is passed through in haze generator from gas access, is passed through anion from anion entrance, makes by step 1
The particle of anion and haze gas meets, and falls after polymerization, and haze gas is made to lose activity, and forms the aggregation of particles of saturation
Mixed gas after polymerization is expelled in gas box by object from outlet；
Step 2, laser light source and pump light source are under the action of the first coupler, pump light source energy coupling to laser
It in light source, is transmitted through optical fiber, then by the way that after Erbium-doped fiber amplifier, the light through isolator outflow reaches the second coupler；
Step 3, light a part after the coupling of the second coupler enter gas box, and another part enters to downstream the
In two couplers, a part of light is sent into corresponding gas box by the second coupler of downstream, and another part light enters the of downstream
In two couplers, all light are sent into corresponding gas box by the last one second coupler；
Step 4, the gas in gas box incudes through fibre optical sensor, then monitors cavity inner temperature by Bragg grating
Variation spreads out of the optical signal with information, chooses transmission port by space division multiplexing device, finally shows optical information in spectrometer
Show；
Step 5 maps in conjunction with data processing software Origin by observing spectrometer figure, is able to reflect out figure
Wavelength or energy variation, to obtain corresponding gas concentration.
Compared with prior art, the present invention polymerize haze gas by haze generator, haze gas after polymerization
In the particle that contains polymerize, to lose activity.Mixed gas is passed through detection system, detects phase using fibre optical sensor
Gas and Bragg grating is answered to monitor temperature change in gas box.By observation sensor transmission spectrum variation, to measure haze
The concentration of each main component.The present invention can be realized distributed measurement and each measuring instrument is not needed using standard film or mark
Quasi- gas corrects instrument, need to only change the gas in gas box every time, other measuring instruments do not need amendment, it can be achieved that system
The purpose that key instrument is reused.
Method of the invention makes for haze to be passed through in haze generator, is passed through anion in haze generator and polymerize with it
Mixed gas is finally sent into gas box by deposition, and pump light source energy is coupled in laser light source through coupler effect,
The light of sending carries out erbium-doped fiber amplification and isolator for light one-way transmission, is connected in coupler, the light after a part coupling
To mixed gas in gas box, through fibre optical sensor and Bragg grating sensing, into space division multiplexing device, enter back into spectrometer into
Row display observes figure wavelength or energy variation, obtains corresponding gas concentration in conjunction with mapping software；After another part coupling
Light is sent into another coupler, and another gas concentration is observed.This method can be realized Simultaneous Determination, and each measuring instrument
It does not need to be modified using standard film or calibrating gas, it is often more important that, can due to the features such as optical fiber is light-weight and easy networking
To carry out distributed measurement in observation station.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of haze generator in the present invention；
Fig. 2 is the schematic diagram of detection system in the present invention；
Wherein, 1 is gas access；2 are negative ion entrance；3 be gas vent；4 be gas inlet valves；5 be anion
Valve；6 be gas outlet valve；7 be laser light source；8 be the first coupler；9 be pump light source；10 be erbium-doped fiber；11 are
Isolator；12 be the second coupler；13 be gas box；14 be fibre optical sensor；15 be Bragg grating；16 be space division multiplexing
Device；17 be spectrometer.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
A kind of device for surveying haze main component using cell method in optical active fiber, including haze generator and detection system；
Referring to Fig. 1, haze generator includes closed tank body, and gas access 1, anion entrance 2 are offered on closed tank body
With gas vent 3, gas inlet valves 4, anion are respectively arranged on gas access 1, anion entrance 2 and gas vent 3
Inlet valve 5 and gas outlet valve 6；
Referring to fig. 2, detection system includes laser light source 7 and pump laser 9, and pump laser 9 and laser light source 7 connect
First coupler 8, the first coupler 8 connect erbium-doped fiber amplifier 10 by optical fiber, and erbium-doped fiber amplifier 10 passes through optical fiber
Connect optoisolator 11, several second couplers 12 of 11 downstream tandem of optoisolator, between erbium-doped fiber 10 and the second coupler 12
It is provided with isolator 11, pump light source 9 and laser light source 7 are all connected on the first coupler 8, and each second coupler 12 is all connected with
Corresponding fibre optical sensor 14, fibre optical sensor 14 connect Bragg grating 15, and fibre optical sensor 14 and Bragg grating 15 exist
In gas box 13, Bragg grating 15 connects space division multiplexing device 16, and space division multiplexing device 16 connects spectrometer 17, and spectrometer 17 is shown
Figure observes figure wavelength or energy variation, obtains corresponding gas concentration in conjunction with mapping software；All second couplers 12 are used
In remaining corresponding gas concentration.
Second coupler 12 uses 1 × 2 coupler.
A kind of working method of device that surveying haze main component using cell method in optical active fiber, comprising the following steps:
Step 1 is separated out the haze gas that particle diameter is less than or equal to 2.5 microns using cutter, opens gas and enters
Mouth valve 4, haze gas is passed through in haze generator from gas access 1, is closed gas inlet valves 4 and is opened simultaneously anion
Inlet valve 5 is passed through anion from anion entrance 2, so that anion and the particle of haze gas is met, falls, make after polymerization
Haze gas loses activity, and forms mixed gas, and anion does not react with any gas therein, opens gas vent valve
Door 6, mixed gas is expelled in gas box 13 from gas vent 3；
Step 2, pump light source 9 act on through the first coupler 8, energy are coupled in laser light source 7, and the light of transmission is logical
It crosses after intelligent acess erbium-doped fiber amplifier 10 amplifies through optoisolator 11, optoisolator 11 transmits light to the second coupler
It is coupled in 12；
Step 3, after the coupling of coupler 12, light a part enters gas box 13, through fibre optical sensor and Prague
Grating sensing；Another part light enters in remaining coupler；
Step 4, the fibre optical sensor in gas box can interact with corresponding gas to be detected, such as SO2, CO and
Nitrogen oxides will cause transmitted spectrum and change；Bragg grating 15 monitors gas box internal temperature, it is ensured that fibre optical sensor
Detection gas concentration is carried out in steady temperature；
Step 5, space division multiplexing device 16 connect in corresponding fiber port, then incoming spectrometer 17.According to 17 figure of spectrometer
And data observe figure wavelength or energy variation, to obtain corresponding gas concentration in conjunction with mapping software Origin.Measure with
The negative ion amount that particle reacts completely, and then obtain granule density.
Claims (6)
1. a kind of device for surveying haze main component using cell method in optical active fiber, which is characterized in that including haze generator and
Detection system；
Haze generator includes closed tank body, and gas access (1), anion entrance (2) and gas vent are provided on tank body
(3)；
Detection system includes laser light source (7), and laser light source (7) connects the first coupler (8), the first coupler (8) connection pump
Pu light source (9) and erbium-doped fiber (10), several second couplers (12) of erbium-doped fiber (10) downstream tandem, each second coupler
(12) it is all connected with corresponding fibre optical sensor (14), fibre optical sensor (14) connects Bragg grating (15), fibre optical sensor
(14) it is located in gas box (13) with Bragg grating (15), Bragg grating (15) connects space division multiplexing device (16), spatial division multiplexing
Spectrometer (17) are connected with device (16), gas box (13) connects gas vent (3)；
The gas that space division multiplexing device (16) monitors the external information that fibre optical sensor (14) detects and Bragg grating (15)
Body box (14) temperature change, which is transmitted in spectrometer (17), to be shown, by observing image change, can be obtained in gas box
The concentration of corresponding gas.
2. a kind of device for being surveyed haze main component using cell method in optical active fiber according to claim 1, feature are existed
In being respectively arranged with gas inlet valves (4) on gas access (1), anion entrance (2) and gas vent (3), anion enters
Mouth valve (5) and gas outlet valve (6).
3. a kind of device for being surveyed haze main component using cell method in optical active fiber according to claim 1, feature are existed
In being provided with optoisolator (11) between Er-doped fiber (10) and the second coupler (12).
4. a kind of device for being surveyed haze main component using cell method in optical active fiber according to claim 1, feature are existed
In the second coupler (12) uses 1 × 2 coupler.
5. a kind of device for being surveyed haze main component using cell method in optical active fiber according to claim 1, feature are existed
In the central wavelength of all Bragg gratings (15) is different.
6. a kind of working method of device that haze main component is surveyed using cell method in optical active fiber described in claim 1,
It is characterized in that, comprising the following steps:
Haze gas is passed through in haze generator from gas access (1), is passed through anion from anion entrance (2) by step 1,
So that anion and the particle of haze gas is met, fall after polymerization, haze gas is made to lose activity, forms the aggregation of particles of saturation
Mixed gas after polymerization is expelled in gas box (13) by object from outlet (3)；
Step 2, laser light source (7) and pump light source (9) are under the action of the first coupler (8), pump light source (9) energy coupling
Close in laser light source (7), transmitted through optical fiber, then by Er-doped fiber (10) amplify after, through isolator (11) spread out of light arrive
Up to the second coupler；
Step 3, light a part after the coupling of the second coupler enter gas box (13), and another part enters to downstream the
In two couplers, a part of light is sent into corresponding gas box by the second coupler of downstream, and the of another part soft exchange downstream
In two couplers, all light are sent into corresponding gas box by the last one coupler；
Step 4, the gas in gas box (13) incudes through fibre optical sensor (14), then monitors chamber by Bragg grating (15)
Body temperature variation, the optical signal with information is spread out of, and is shown after space division multiplexing device (16) in spectrometer (17)；
Step 5 maps in conjunction with data processing software Origin by observing spectrometer (17) figure, is able to reflect out figure
Wavelength or energy variation, to obtain corresponding gas concentration.
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| CN201811291161.5A CN109358010A (en) | 2018-10-31 | 2018-10-31 | A kind of device and method for surveying haze main component using cell method in optical active fiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865742A (en) * | 2021-08-20 | 2021-12-31 | 北京工业大学 | Method and device for measuring temperature of inner side of coated film of cavity surface of semiconductor laser based on detection optical fiber |
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