CN106769923A - A kind of water vapor condensation characteristic measuring device based on laser absorption and scattering - Google Patents
A kind of water vapor condensation characteristic measuring device based on laser absorption and scattering Download PDFInfo
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- CN106769923A CN106769923A CN201611065131.3A CN201611065131A CN106769923A CN 106769923 A CN106769923 A CN 106769923A CN 201611065131 A CN201611065131 A CN 201611065131A CN 106769923 A CN106769923 A CN 106769923A
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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
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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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
Abstract
The invention discloses a kind of water vapor condensation characteristic measuring device based on laser absorption and scattering, including the condensation chamber exchanged heat for gas mixing and the optical measurement module that is arranged in condensation chamber, in vacuum tank, condensation chamber is respectively arranged at two ends with air inlet and exhaust outlet to condensation chamber；Air inlet carries air intake and nitrogen inlet arranged side by side；Optical measurement module includes U-shaped bearing and the miniature laser generator and micro spectral detector that are arranged in U-shaped bearing two-arm；Miniature laser generator lower section is provided with the second speculum and the 4th speculum；Micro spectral detector top is provided with the first speculum and the 3rd speculum, and lower section is provided with micro temperature sensor.Water smoke formed and condensation in condenser pipe in the vapor in air there is.Miniature laser generator can produce the laser of certain strength and wavelength, and the measurement of micro spectral detector, according to light intensity and the corresponding relation of water smoke concentration, can accurately measure the volume fraction of water smoke in air by the laser intensity after absorption and scattering.
Description
Technical field
The present invention relates to fluid phase change experimental provision, and in particular to a kind of water vapor condensation based on laser absorption and scattering
Characteristic measuring device.
Background technology
Water smoke extinguish electrically, naval vessel, building all kinds fire be widely used, in oil, natural gas line
Conveying and mine gas anti-explosion explosion-suppression field there has also been certain application and develop.Water smoke concentration is to characterize water smoke feature in space
One of important parameter.It is general for the research of the condensing characteristic of vapor and other gases to be limited to be exchanged heat with the contact of solid
Research, such as gas is studied in the condensing characteristic of pipe inner surface or fin surface.The liquid that gas interior heat exchange condensation is formed
Often vaporific, and lumped together with gas, the amount for condensing the liquid of generation is difficult to measure, therefore gas interior heat exchange is cold
Solidifying characteristic research is extremely difficult.So wanting the condensing characteristic of learning gas internal heat, it is critical only that and realize condensation generation
The measurement of the amount of liquid.
At present, water smoke measurement of concetration is typically by the way of conventional amounts agar diffusion method and weight method.These methods exist it is following not
Foot：1) measurement process need to take a long time, it is impossible to realize measurement in real time；2) average water in certain volume space can only be measured
Mistiness degree, it is impossible to realize point measurement.
The foundation of absorption spectrum detection material concentration is that material has characteristic absorption to light radiation, is treated when beam of laser is passed through
When surveying gas, light can make it have changing features in intensity by material selective absorbing.
The liquid that gas interior heat exchange condensation is formed is often vaporific, and mist is uniformly distributed in atmosphere, forms aerosol
Form, its absorption characteristic to certain strength and the laser of wavelength is similar with gas.However, different from pure gas, mist is by countless
Minute particles composition, these minute particles can also produce dispersion effect to specific spectrum, therefore mist is to certain strength
And the laser of wavelength has absorption and dispersion effect simultaneously.Absorption and scattering with reference to mist to certain strength and the laser of wavelength,
The water smoke concentration that vapor condenses generation in atmosphere can be measured quickly.
The Chinese patent literature of Publication No. CN101256130A discloses a kind of water content of high-precision coal gas machinery measurement
Method and device, its feature is to load appropriate superfine high-purity degree glass fibre inside glass filter cylinder, and the filter cylinder is fixed
In in taper, it is fixed using polytetrafluoroethylene (PTFE) adhesive tape, in the glass layer that it is formed, can be by coal gas
Mechanical water is intercepted.Weight difference before and after being measured equipped with glass fiber filter cylinder by accurate weighing, and write down to flow through simultaneously and adopt
The gas flow of sample pipe, just can obtain the mechanical water content in coal gas.The certainty of measurement of the device reaches 0.1mg/m3But, survey
Amount once needs 10 minutes, it is impossible to water smoke content in the quick air of measurement in real time.
Notification number discloses a kind of water smoke apparatus for measuring concentration and measurement side for the Chinese patent literature of CN103558187A
Method, is related to water smoke concentration measuring apparatus, water smoke concentration calibration device and water smoke concentration measuring method.Water smoke concentration measuring apparatus include branch
Frame, installed in the optical emitting unit and optical receiver unit of support both sides, gas flow purging device.Water smoke concentration calibration device bag
The casing equipped with water fog generator is included, casing side is equipped with door leaf equipped with fog fan, casing opposite side is blown, and casing is placed in pressure biography
On sensor, pressure acquisition instrument couples with pressure sensor.Measuring method is：Preparation water smoke concentration measuring apparatus, water smoke concentration calibration
Device；The relational expression of water smoke concentration and scattering voltage is inscribed when measuring and set up corresponding sedimentation；The relational expression is placed in single-chip microcomputer
After in control circuit, so that it may water smoke concentration measuring apparatus are arranged in real water smoke environment, in real time measurement water smoke concentration value.
However, there is following defect in the device and method：
1. the invention prevents lens to be stained with by the way of gas purging device blows air to diversing lens and receiving lens
Water smoke, if measuring water smoke concentration using the invention device in the atmospheric environment containing water smoke, the air that blow device is used is same
Sample contains water smoke, and not mentioning blow device in the invention has the pre-treatment of moisture filter, therefore in real atmosphere environment
Water smoke measurement of concetration in lens cannot be prevented to be stained with water smoke；
2. determine that standard water mistiness degree uses following methods during the prepared water smoke concentration calibration of the invention：" collection is blown
Go out the water smoke quality of the suspension before and after the water smoke that suspends in the weight difference i.e. T1 time point casings of casing, with the water smoke quality divided by case
Body volume is the water smoke concentration in casing ", this method have ignored the influence that the phase transition process of water brings, and blow out suspension water smoke
Before, part water smoke is settled in casing, and the water smoke during this is not always maintained at liquid, and water smoke can gasify as water steams
Gas, the influence of water phase transformation is not notable in a short time, but with the growth of sedimentation time, phase transition process is to water smoke concentration
Calibration result influence is increasing, brings larger error, and the demarcation mode error that the invention is used is larger；
3. water smoke concentration value standard deviation respectively less than 5g/m is mentioned in the content of the invention3, reference《The thing of Nanling hilly area thick fog
Reason feature》(Deng Xuejiao is published in equal in August, 2002《Tropical meteorology report》3rd phase volume 18), 0.2g/m3Water smoke concentration
Already belong to thick fog scope, 5g/m3Error do not allowed in the water smoke measurement of concetration of real atmosphere environment, measurement error
It has been far longer than measured value.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of water vapor condensation based on laser absorption and scattering
Characteristic measuring device, solves following problem present in gas interior heat exchange condensing characteristic research：The small model in flow field inside
The local water smoke concentration enclosed is difficult to the problem for quick and precisely measuring；The measurement problem of the water smoke concentration of diverse location；Heat transfer characteristic
The variable working condition control problem of research.
Technical scheme is as follows：
A kind of water vapor condensation characteristic measuring device based on laser absorption and scattering, including exchanged heat for gas mixing
Condensation chamber and the optical measurement module being arranged in condensation chamber, described condensation chamber in vacuum tank, divide by condensation chamber two ends
Air inlet and exhaust outlet are not provided with；Described air inlet carries air intake and nitrogen inlet arranged side by side；Described optical measurement
Module includes U-shaped bearing and the miniature laser generator and micro spectral detector that are separately positioned in U-shaped bearing two-arm；It is described
Miniature laser generator lower section be provided with the second speculum and the 4th speculum；Described micro spectral detector top is set
There are the first speculum and the 3rd speculum, lower section is provided with micro temperature sensor.
In above-mentioned technical proposal, mixed in condensation chamber by air and low temperature nitrogen, make the vapor in air
Generation condensation forms water smoke.Vacuum tank makes condensation chamber adiabatic with environment, and the miniature laser generator of optical measurement module can be produced
The laser of certain strength and wavelength, this laser is successively in the first speculum, the second speculum, the 3rd speculum, the 4th speculum
Surface there is mirror-reflection, be finally radiated on micro spectral detector, the air containing various concentrations water smoke is to specific strong
The absorptivity and scattered power of the laser of degree and wavelength are different, are measured by swashing after absorption and scattering by micro spectral detector
Luminous intensity, according to light intensity and the corresponding relation of water smoke concentration, can rapidly and accurately measure the volume fraction of water smoke in air, with this
Water smoke concentration in measurement air.Micro temperature sensor below micro spectral detector can be used to measure the gas at detection
Temperature.
Preferably, the first electrified rail being powered to micro spectral detector is provided with described condensation chamber side by side
With the second electrified rail being powered to miniature laser generator；Between the first described electrified rail and the second electrified rail
It is provided with the electric signal for transmitting micro spectral detector and micro temperature sensor and micro temperature sensor is powered
The 3rd electrified rail.Optical measurement module can be moved along three guide rails.
Preferably, the bottom of the U-shaped bearing is provided with first passage, second channel and third channel, described first
Passage is provided with the first contact block of the first electrified rail of connection, and described second channel is provided with the second electrified rail of connection
Second contact block, described third channel is provided with the 3rd contact block of the 3rd electrified rail of connection.
Preferably, the upper wall inner side of the condensation chamber is provided with the microheater being equally spaced, microheater pair
Gas in condensation chamber carries out local heating, it is had different temperature along the diverse location of gas flow direction.
Preferably, the lower wall outside of the condensation chamber is provided with power slide rail and is guided along the power that power slide rail is moved
Block.
Preferably, described power slide rail is connected with the stepper motor of control power bootstrap block motion.
Preferably, being respectively equipped with the first attracting permanent magnet at the top of the bottom of the U-shaped bearing and power bootstrap block
With the second permanent magnet, optical measurement module can be translated with power bootstrap block.
Preferably, described air intake connects warm and humid control cabinet by air intake conduit；Described air inlet
Air air pump, air air valve and mass air flow sensor are sequentially provided with pipeline.Control to be passed through the sky of condensation chamber by warm and humid control cabinet
Temperature and moisture.Air air pump is used for the air mass flow for controlling to be passed through condensation chamber；Air air valve is used to control the switch of air pipe line；
Mass air flow sensor is used to measure the flow of the air for being passed through condensation chamber.
Preferably, described nitrogen inlet connects the liquid nitrogen container for being provided with liquid nitrogen heater by nitrogen inlet duct road；Institute
Nitrogen air valve, nitrogen stream gauge, nitrogen heater and nitrogen gas thermometer are sequentially provided with the nitrogen inlet duct road stated.By liquid nitrogen
Heater heating makes liquid-nitrogen boiling gasify to form low temperature nitrogen, and the heating power for changing liquid nitrogen heater can change and be passed through condensation chamber
Nitrogen flow.Nitrogen air valve is the switch for controlling nitrogen pipeline；Nitrogen stream gauge is used to measure the nitrogen for being passed through condensation chamber
The flow of gas；Nitrogen heater is used for heated nitrogen, and the heating power for changing nitrogen heater can change the nitrogen for being passed through condensation chamber
Temperature degree.Nitrogen gas thermometer is used to measure the nitrogen temperature for being passed through condensation chamber.
Preferably, described exhaust outlet is connected with the gas exhaust piping of air bleeding valve, air bleeding valve be used to controlling condensation chamber to
External environment condition discharges mixed gas.
Preferably, described micro spectral detector sealer, miniature laser generator camera lens, the first reflection
Mirror, the second speculum, the 3rd speculum and the 4th speculum, material used are super-hydrophobic glass, prevent water smoke to be bonded at phase
Close surface influence certainty of measurement.
Preferably, described liquid nitrogen container is provided with safety valve, for preventing liquid nitrogen container hypertonia from exploding.
Preferably, described water vapor condensation characteristic measuring device is provided with controller, for controlling liquid nitrogen heater, nitrogen
The heating power of hot-air heater and microheater, is miniature laser generator and micro spectral inspection while controlling stepper motor
Instrument is surveyed to power, and for receiving the electric signal of micro temperature sensor and micro spectral detector.
Compared with prior art, beneficial effects of the present invention are：
(1) moved on slide rail of the U-shaped bearing of optical measurement module of the invention using Magnetic Control in condensation chamber, filled
Divide the quantity and volume for reducing part in condensation chamber, so as in the case where the influence of measurement part stream field is reduced as far as possible, obtain
Obtain the water smoke concentration and temperature of diverse location in cold chamber.
(2) the first speculum, the second speculum, the 3rd speculum, the 4th are arranged in optical measurement module of the invention
Speculum, increased the laser of certain strength and wavelength in miniature laser generator and micro spectral detector in the confined space
Between light path, improve the sensitivity of measuring system.
(3) present invention is passed through the air of condensation chamber and parameter (aerial temperature and humidity, the flow, nitrogen temperature of nitrogen by control
Degree, flow), the microheater heating in condensation chamber change the gas temperature of diverse location, be capable of achieving different operating modes, feasibility study
Study carefully the water vapor condensation characteristic under the conditions of various heat exchange.
Brief description of the drawings
Fig. 1 is that the system architecture of water vapor condensation characteristic measuring device of the present invention based on laser absorption and scattering is illustrated
Figure；
Fig. 2 is vacuum tank inner structure schematic diagram of the invention；
Fig. 3 is optical measurement module structural representation；
Fig. 4 is bottom and the electrified rail connection diagram of the U-shaped bearing of optical measurement module；
Fig. 5 is the light path schematic diagram of optical measurement module；
Each reference is in figure：
1. warm and humid control cabinet；2. air air pump；3. air air valve；4. mass air flow sensor；5. nitrogen heater；6. nitrogen stream
Gauge；7. nitrogen air valve；8. liquid nitrogen container；9. liquid nitrogen heater；10. safety valve；11. nitrogen gas thermometers；12. vacuum tanks；13. rows
Air valve；14. controllers；15. condensation chambers；16. microheaters；17. optical measurement modules；18. electrified rails；19. power draw
Guide block；20. power slide rails；21. stepper motors；22. micro spectral measuring instruments；23. miniature laser generators；24. first permanent magnetism
Body；25. second permanent magnets；26. first electrified rails；27. second electrified rails；28. the 3rd electrified rails；29；First contact
Block；30. the 3rd contact blocks；31. second contact blocks；32. micro temperature sensors；33. miniature laser generator camera lenses；34. is micro-
Type optical spectrum instrumentation protective layer；35. first speculums；36. second speculums；37. the 3rd speculums；38. the 4th speculums.
Specific embodiment
With reference to the accompanying drawings and detailed description to a kind of water vapor condensation based on laser absorption and scattering of the present invention
Characteristic measuring device is described in further detail.
As shown in figure 1, a kind of water vapor condensation characteristic measuring device based on laser absorption and scattering, including vacuum tank 12
And the inside of vacuum tank 12 is arranged on for the condensation chamber 15 of gas mixing heat exchange, vacuum tank 12 makes condensation chamber 15 exhausted with environment
Heat, one end of condensation chamber 15 is provided with nitrogen inlet and air intake, and nitrogen inlet is connected by nitrogen inlet duct road with liquid nitrogen container 8,
Air intake is connected by air intake conduit with warm and humid control cabinet 1.The other end of condensation chamber 15 is provided with exhaust outlet, the row of being connected with
The gas exhaust piping of air valve 13, air bleeding valve 13 is used to control condensation chamber external environment to discharge mixed gas.
Nitrogen air valve 7, nitrogen stream gauge 6, nitrogen heater 5 and nitrogen gas thermometer are sequentially provided with nitrogen inlet duct road
11.Nitrogen air valve 7 is the switch for controlling nitrogen pipeline；Nitrogen stream gauge 6 is used to measure the nitrogen stream for being passed through condensation chamber 15
Amount；Nitrogen heater 5 is used for heated nitrogen, and the heating power for changing nitrogen heater 5 can change the nitrogen for being passed through condensation chamber 15
Temperature.Nitrogen gas thermometer 11 is used to measure the nitrogen temperature for being passed through condensation chamber 15.
Air air pump 2, air air valve 3 and mass air flow sensor 4 are sequentially provided with air intake conduit.Air air pump 2 is used for
Control is passed through the air mass flow of condensation chamber 15；Air air valve 3 is used to control the switch of air pipe line；Mass air flow sensor 4 is used to survey
Amount is passed through the flow of the air of condensation chamber 15.Warm and humid control cabinet 1 is used for the aerial temperature and humidity for controlling to be passed through condensation chamber 15.
There is liquid nitrogen heater 9 in liquid nitrogen container 8, the heating of liquid nitrogen heater 9 makes liquid-nitrogen boiling gasify to form low temperature nitrogen, changes
The heating power of liquid nitrogen heater 9 can change the nitrogen flow for being passed through condensation chamber 15.Liquid nitrogen container 8 is provided with safety valve 10, for preventing
Only the hypertonia of liquid nitrogen container 8 is exploded.Nitrogen heater 5 is used for heated nitrogen, and the heating power for changing nitrogen heater 5 can
Change is passed through the nitrogen temperature of condensation chamber 15.
Package unit is provided with a controller 14.
As shown in Fig. 2 the inside of vacuum tank 12 includes condensation chamber 15, the upper wall of condensation chamber 15 inner side is arranged in equal spacing with miniature adding
Hot device 16, microheater 16 is heated to the gas in condensation chamber 15, it is had in the diverse location along velocity attitude
Different temperature.The lower wall outside of condensation chamber 15 is provided with power slide rail 20 and the power bootstrap block moved along power slide rail 20
19.Optical measurement module 17 and electrified rail 18 are disposed with inside condensation chamber 15, optical measurement module 17 can be along electrified rail 18
It is mobile.Optical measurement module 17 keeps relative position to fix with power bootstrap block 19 by magnetic force, and stepper motor 21 drives power
Bootstrap block 19 is moved on power slide rail 20, and movement of the optical measurement module 17 in condensation chamber is realized with this.
As shown in Figure 3,4, the U-shaped rest base of optical measurement module 17 is provided with the first permanent magnet 24, power bootstrap block 19
Top be provided with the second permanent magnet 25, the first permanent magnet 24 is attracting with the second permanent magnet 25, is between the two the wall of condensation chamber 15,
Power bootstrap block 19 guides optical measurement module 17 to move by magnetic force.In the U-shaped bearing two-arm of optical measurement module 17 respectively
Miniature laser generator 23 and micro spectral detector 22 are disposed with, the top of micro spectral detector 22 is provided with the first speculum
35 and the 3rd speculum 37, lower section is provided with micro temperature sensor 32, and it is anti-that the lower section of miniature laser generator 23 is provided with second
Penetrate the speculum 38 of mirror 36 and the 4th.Micro spectral detector sealer 34, miniature laser generator camera lens 33, first reflect
Mirror 35, the second speculum 36, the 3rd speculum 37, the 4th speculum 38, material used are super-hydrophobic glass, prevent water smoke
It is bonded at relevant surfaces influence certainty of measurement.Miniature laser generator 23 can produce the laser of certain strength and wavelength, this laser elder generation
There is mirror-reflection on the surface of the first speculum 35, the second speculum 36, the 3rd speculum 37, the 4th speculum 38 afterwards, most
It is radiated at eventually on micro spectral detector 22, micro spectral detector 22 is detectable by the laser intensity after absorption and scattering,
The corresponding relation of the laser intensity after laser absorption and scattering according to different water smoke concentration with certain strength and wavelength can be obtained
Go out air reclaimed water mistiness degree.Micro temperature sensor 32 is used to measure the gas temperature at detection.
18 points of electrified rail inside condensation chamber 15 is the first electrified rail 26, the second electrified rail 27 and threeway conductance
Rail 28, the bottom of the U-shaped bearing of optical measurement module 17 is provided with first passage, second channel and third channel, on first passage
The first contact block 29 of the first electrified rail 26 of connection is provided with, second channel is provided with second connecing for the second electrified rail 27 of connection
Contact block 31, third channel is provided with the 3rd contact block 30 of the 3rd electrified rail 28 of connection.Contact block 29, contact block 31 and contact
Block 30 is respectively provided with electric conductivity.Electrified rail 27 is powered for miniature laser generator 23, and electrified rail 26 is micro spectral detector
22 power supplies, electrified rail 28 is used to transmit the electric signal of micro spectral detector 22 and micro temperature sensor 32.
When package unit is normally used, controller 14 be used for control liquid nitrogen heater 9, nitrogen heater 5 and it is miniature plus
The heating power of hot device 16, is miniature laser generator 23, micro spectral detector 22 and miniature while controlling stepper motor 21
Temperature sensor 32 is powered, and for receiving the electric signal of micro temperature sensor 32 and micro spectral detector 22.
The nitrogen of the air and different flow and temperature of different flow and humiture mixes in condensation chamber 15, makes sky
There is condensation and form water smoke in the vapor in gas, the gas in the heating condensation chamber 15 of microheater 16 changes in condensation chamber 15
Temperature Distribution so that the water smoke concentration of diverse location is changed, and optical measurement module 17 is moved inside condensation chamber 15, can
Measure the water smoke concentration and temperature of diverse location.
Optical measurement module 17 needs to be demarcated with traditional absorption weight method, it is determined that the sky containing various concentrations water smoke
Absorption and scattering degree of the gas to certain strength and the laser of wavelength, fit water smoke concentration and are inhaled with certain strength and wavelength laser
Receive and scatter the homologous thread of degree.Optical measurement module 17 after demarcation can be according to measurement after water smoke absorbs and scatters
Laser intensity, be quickly calculated the water smoke concentration in air.
Intend as follows using scaling method:
1st, control is passed through the air of condensation chamber and the parameter (aerial temperature and humidity, flow, nitrogen temperature, flow) of nitrogen,
Certain density water smoke is produced in condensation chamber；
2nd, using the gas temperature in the measurable nearly exit of micro temperature sensor, the microheater in regulation condensation chamber
Power so that the gas temperature in nearly exit is consistent with ambient temperature in condensation chamber and stablizes constant, keeps gas temperature
It is consistent with room temperature to avoid water smoke that strong phase transformation influence stated accuracy occurs after discharging condensation chamber, due to condensation intracavity gas discharge
Afterwards, water smoke therein is absorbed by follow up device immediately, therefore influence of the phase transformation to measurement is negligible；
3rd, miniature laser generator and micro spectral detector are opened, miniature laser generator produces certain strength and wavelength
Laser, this laser successively the first speculum, the second speculum, the 3rd speculum, the 4th speculum surface occur minute surface
Reflection, is finally radiated on micro spectral detector, and micro spectral detector measures being absorbed by water smoke and scattered for nearly exit
Laser intensity after penetrating, and transmit the result to controller, test constantly absorbed by water smoke until the nearly exit of condensation chamber and
Laser intensity stabilization after scattering；
4th, the gas discharged by condensation chamber air bleeding valve is passed through the glass fibers equipped with appropriate superfine high-purity degree glass fibre
Dimension filter cylinder, the weight difference before and after being measured equipped with glass fiber filter cylinder by accurate weighing, and the gas for flowing through sampling pipe is write down simultaneously
Body flow, the weight difference before and after glass fiber filter cylinder measurement is divided by the gas gross for being passed through glass fiber filter cylinder, you can obtain water smoke
Concentration, the standard in this, as water smoke concentration can determine that this corresponding water smoke of water smoke concentration to certain strength and the laser of wavelength
Laser intensity after absorbing and scattering；
5th, the parameter (aerial temperature and humidity, flow, nitrogen temperature, flow) of the air and nitrogen that are passed through condensation chamber, weight are changed
Multiple step 2-4, laser intensity after can obtain the laser absorption of different water smoke concentration and certain strength and wavelength and scattering it is right
Should be related to, finally simulate corresponding relation curve with computer.
The foregoing is only preferable implementation example of the invention, be not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of water vapor condensation characteristic measuring device based on laser absorption and scattering, including for gas mixing exchange heat it is cold
Solidifying chamber and the optical measurement module being arranged in condensation chamber, it is characterised in that：
In vacuum tank, condensation chamber is respectively arranged at two ends with air inlet and exhaust outlet to described condensation chamber；
Described air inlet carries air intake and nitrogen inlet arranged side by side；
Described optical measurement module include U-shaped bearing and the miniature laser generator that is separately positioned in U-shaped bearing two-arm and
Micro spectral detector；
Described miniature laser generator lower section is provided with the second speculum and the 4th speculum；
Described micro spectral detector top is provided with the first speculum and the 3rd speculum, and lower section is provided with Miniature temperature biography
Sensor.
2. water vapor condensation characteristic measuring device as claimed in claim 1, it is characterised in that：Set side by side in described condensation chamber
There are the first electrified rail being powered to micro spectral detector and second be powered to miniature laser generator to be powered
Guide rail；It is provided with for transmitting micro spectral detector and Miniature temperature between the first described electrified rail and the second electrified rail
The electric signal of sensor and the 3rd electrified rail being powered to micro temperature sensor.
3. water vapor condensation characteristic measuring device as claimed in claim 1 or 2, it is characterised in that：The bottom of the U-shaped bearing
It is provided with first passage, second channel and third channel, what described first passage was provided with the first electrified rail of connection first connects
Contact block, described second channel is provided with the second contact block of the second electrified rail of connection, and described third channel is provided with company
Connect the 3rd contact block of the 3rd electrified rail.
4. water vapor condensation characteristic measuring device as claimed in claim 1, it is characterised in that：The upper wall inner side of the condensation chamber
It is provided with the microheater being equally spaced.
5. water vapor condensation characteristic measuring device as claimed in claim 1, it is characterised in that：The lower wall outside of the condensation chamber
It is provided with power slide rail and the power bootstrap block moved along power slide rail.
6. the water vapor condensation characteristic measuring device as described in claim 1 or 5, it is characterised in that：The bottom of described U-shaped bearing
Attracting the first permanent magnet and the second permanent magnet is respectively arranged with the top of portion and power bootstrap block.
7. water vapor condensation characteristic measuring device as claimed in claim 1, it is characterised in that：Described air intake is by sky
Gas air inlet pipeline connects warm and humid control cabinet；Air air pump, air air valve and air are sequentially provided with described air intake conduit
Flowmeter.
8. water vapor condensation characteristic measuring device as claimed in claim 1, it is characterised in that：Described nitrogen inlet passes through nitrogen
The connection of gas air inlet pipeline is provided with the liquid nitrogen container of liquid nitrogen heater；Nitrogen air valve, nitrogen are sequentially provided with described nitrogen inlet duct road
Air-flow gauge, nitrogen heater and nitrogen gas thermometer.
9. water vapor condensation characteristic measuring device as claimed in claim 1, it is characterised in that：Described exhaust outlet is connected with
The gas exhaust piping of air bleeding valve.
10. water vapor condensation characteristic measuring device as claimed in claim 1, it is characterised in that：Described micro spectral detection
Instrument sealer, miniature laser generator camera lens, the first speculum, the second speculum, the 3rd speculum and the 4th speculum,
Material used is super-hydrophobic glass.
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| CN201611065131.3A CN106769923B (en) | 2016-11-28 | 2016-11-28 | A kind of vapor condensing characteristic measuring device based on laser absorption and scattering |
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| CN201611065131.3A CN106769923B (en) | 2016-11-28 | 2016-11-28 | A kind of vapor condensing characteristic measuring device based on laser absorption and scattering |
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| CN106769923B CN106769923B (en) | 2019-05-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637304A (en) * | 2019-01-23 | 2019-04-16 | 长江大学 | A kind of standing wave demonstrating instrument |
| CN111366830A (en) * | 2020-03-17 | 2020-07-03 | 苏州长光华芯光电技术有限公司 | Semiconductor laser low temperature testing arrangement |
| US10950108B2 (en) | 2019-08-09 | 2021-03-16 | Rosemount Aerospace Inc. | Characterization of aerosols |
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| EP0409546A2 (en) * | 1989-07-17 | 1991-01-23 | Osaka Sanso Kogyo KK | Apparatus for measuring the water content of a gas |
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| CN109637304A (en) * | 2019-01-23 | 2019-04-16 | 长江大学 | A kind of standing wave demonstrating instrument |
| US10950108B2 (en) | 2019-08-09 | 2021-03-16 | Rosemount Aerospace Inc. | Characterization of aerosols |
| CN111366830A (en) * | 2020-03-17 | 2020-07-03 | 苏州长光华芯光电技术有限公司 | Semiconductor laser low temperature testing arrangement |
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