CN108414408A - A kind of compact-sized coaxial-type whole audience rainbow drop measurement probe - Google Patents
A kind of compact-sized coaxial-type whole audience rainbow drop measurement probe Download PDFInfo
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- CN108414408A CN108414408A CN201810233166.6A CN201810233166A CN108414408A CN 108414408 A CN108414408 A CN 108414408A CN 201810233166 A CN201810233166 A CN 201810233166A CN 108414408 A CN108414408 A CN 108414408A
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- probe
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- 239000000523 sample Substances 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 title abstract description 5
- 239000013307 optical fiber Substances 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims description 15
- 238000009423 ventilation Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 3
- 239000000112 cooling gas Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000012625 in-situ measurement Methods 0.000 abstract description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 238000006477 desulfuration reaction Methods 0.000 description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 229910001425 magnesium ion Inorganic materials 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000003189 isokinetic effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
- G01N15/0227—Investigating particle size or size distribution by optical means using imaging; using holography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- 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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
-
- 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
- G01N21/84—Systems specially adapted for particular applications
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to drop measuring techniques, it is desirable to provide a kind of compact-sized coaxial-type whole audience rainbow drop measurement probe.Its light path system includes front lens, rear lens and the disk with centre bore that sequence is mounted in lens sleeve, and the digital camera with tight shot is set after disk；One optical fiber collimator for being parallel to lens sleeve axis is fixed on disk border, and transmitting terminal is directed at the through-hole on rear lens；The focal length for being smaller than the two lens of front lens and rear lens, for the equivalent image space focal plane of the two lens between rear lens and rear lens focal plane, the centre bore of disk is located at the rear focus of rear lens；The parameter of tight shot, which should ensure that, can record front lens and the clear rainbow images at the equivalent image space focal plane of rear lens.The present invention substantially reduces the axial dimension of whole audience rainbow probe using coaxial design, alleviates the weight of probe, easy to use.In situ measurement can be realized to the slurry drops of desulphurization system and many kinds of parameters of droplet.
Description
Technical field
The present invention relates to drop measuring technique, more particularly to a kind of compact-sized coaxial-type whole audience rainbow drop, which measures, to be visited
Needle.Camera of the probe based on double lens and with tight shot, for measuring the grain of slurry drops or droplet in power plant desulphurization system
The parameters such as diameter distribution, refractive index, temperature (or component).
Background technology
In today of problem of environmental pollution getting worse, clean coal utilization is trend of the times.The dirt that coal burning generates
It includes sulfur dioxide, nitrogen oxides, pellet, heavy metal, polycyclic aromatic hydrocarbon etc. to contaminate object.Wherein sulfur dioxide is as main
One of pollutant can cause acid rain, corrode vegetation and building, can also endanger human health.In China, lime-gypsum is
The most widely used sulfur dioxide removal technology of power plant, slurry drops are mixed with flue gas in desulphurization system, temperature, particle diameter distribution,
Group gradation parameter influences sulfur dioxide removal efficiency very big.The measurement of slurry drops is only exported in demister at present and measures cigarette
The content of slurry drops in gas：A kind of method is the magnesium thought in slurry drops pond in the concentration of magnesium ion and demister outlet slurry drop
Ion concentration is equal, using isokinetic sampling's method and magnesium ion titration, measures magnesium ion content in slurry drops, then be converted into drop
Amount.Another method is so that flue gas is passed through level-one, two level capturing device using isokinetic sampling, is distinguished afterwards before it is dried after sampling
It weighs, the difference between the two is the amount of drop.
But effective measurement method is lacked to the slurry drops of spraying zone at present, and the amount of slurry drops is difficult to fully instead
Reflect influence of the slurry drops to desulfurization effect.It is usually necessary to use the lens being relatively large in diameter for rainbow scattering technology, and then obtain larger
Scattering light-receiving range, to ensure the accuracy of parametric inversion.However, the larger probe of axial dimension is difficult to stretch into desulfurization system
Unified test hole is unfavorable for the practical application of engineering.As can a kind of small size whole audience rainbow probe is invented, it can be to the slurry of desulphurization system
The parameters such as particle diameter distribution, refractive index, the temperature (component) of drop realize in situ measurement, this is for furtheing investigate slurry drops parameter pair
Desulfuration efficiency influences, and the atomization for improving with this slurry drops is of great significance to improve wet desulphurization efficiency, while
Further investigation for multiphase flow in desulphurization system creates condition.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a kind of compact-sized coaxial-type
Whole audience rainbow drop measures probe.
To solve technical problem, the technical solution adopted by the present invention is：
A kind of compact-sized coaxial-type whole audience rainbow drop measurement probe, including light path system and digital camera are provided；
The light path system include sequence be mounted on lens sleeve in front lens, rear lens and the disk with centre bore, disk it
The digital camera with tight shot is set afterwards；One optical fiber collimator for being parallel to lens sleeve axis is fixed on disk border,
Its transmitting terminal is directed at the through-hole on rear lens；The focal length for being smaller than the two lens of front lens and rear lens, the two are thoroughly
For the equivalent image space focal plane of mirror between rear lens and rear lens focal plane, the centre bore of disk is located at the image space coke of rear lens
Point；The parameter of tight shot, which should ensure that, can record front lens and the clear rainbow images at the equivalent image space focal plane of rear lens.
In the present invention, the front lens is non-spherical lens, a diameter of D, focal length f1, D/f1>0.77；The rear lens
For spherical lens, a diameter of D, focal length f2；The diameter d of the through-hole>3mm is located at the 0.3D of rear lens center.
In the present invention, front lens and rear lens are embedded in snap ring respectively；The lens sleeve carries internal thread, snap ring and circle
Disk is by the external screw thread at respective edge in lens sleeve.
In the present invention, it is provided with semicircle orifice in the side of lens sleeve, in the outer eccentricity welding ventilation sleeve of lens sleeve；
One end of ventilation sleeve is connected to semicircle orifice, for making the protection gas from the ventilation sleeve enter lens sleeve, sleeve of ventilating
The other end be connected with hose for access protection gas.
In the present invention, the optical fiber collimator carries inseparable tail optical fiber, and the side of disk is fixed on by three screws
On edge.
In the present invention, the imaging sensor of the digital camera is CCD or CMOS, and photosensitive unit is linear array or face battle array, cross
It is not less than 1k to resolution ratio.
Further include an extension casing, after the mode that front end is connected through a screw thread is connected to lens sleeve in the present invention
End；Extension casing is double-layer structure, is the channel for being passed through cooling air between outer tube and inner tube, and cooling air inlet is set to outer tube
Rear end；The tail optical fiber of optical fiber collimator and the power cord of digital camera, data line are arranged in inner tube, and the rear end of inner tube sets cooling air
Outlet.
In the present invention, the material that lens sleeve, disk, extension casing are corroded by acid resistance is made, and protection gas hose also may be used
It is arranged in inner tube.
Compared with prior art, the beneficial effects of the present invention are：
1, probe of the invention can be to the slurry drops of desulphurization system and particle diameter distribution, refractive index, the temperature (group of droplet
Point) etc. parameters realize in situ measurement, this influences desulfuration efficiency further investigation slurry drops parameter, and improves slurry drops with this
Atomization be of great significance to improve wet desulphurization efficiency, while also be desulphurization system in multiphase flow further investigation wound
Condition is made.
2, small size whole audience rainbow probe of the present invention, fully takes into account the portability needs of practical implementation,
By using coaxial design, under the premise of lens sizes are certain, substantially reduce the axial dimension of whole audience rainbow probe, to
The weight for alleviating probe, facilitates engineering to use.
Description of the drawings
Fig. 1 is coaxial-type whole audience rainbow probe index path.
Fig. 2 is coaxial-type whole audience rainbow probe structure exploded view.
Fig. 3 is to extend casing schematic diagram.
1 optical fiber collimator in figure；2 front lens；3 rear lens；4 disks；5 tight shots；6 digital cameras；7 lens sleeves；8
Snap ring；9 screws；10 cooling air inlets；11 inner tubes；12 outer tubes.
Specific implementation mode
It is further described in detail below in conjunction with the accompanying drawings：
Coaxial-type whole audience rainbow drop in the present invention measures probe, and light path system includes that sequence is mounted on lens sleeve
Front lens 2, rear lens 3 in 7 and the disk 4 with centre bore, disk 4 set 5 digital cameras 6 with tight shot later；
Front lens 2 and rear lens 3 are embedded in snap ring 8 respectively, and lens sleeve 7 carries internal thread, and snap ring 8 and disk 4 pass through respective edge
External screw thread in the lens sleeve 7.Front lens 2 is non-spherical lens, a diameter of D, focal length f1, D/f1>0.77；Rear lens 3
For spherical lens, a diameter of D, focal length f2；Diameter d there are one being set on rear lens 3>The through-hole of 3mm, through-hole are located at after distance thoroughly
At 3 center 0.3D of mirror.One optical fiber collimator 1 for being parallel to 7 axis of lens sleeve is fixed on 4 edge of disk, transmitting terminal pair
Through-hole on quasi- rear lens 3.Optical fiber collimator carries inseparable tail optical fiber, and the edge of disk is fixed on by three screws 9
On, three screws 9 can facilitate the left and right inclination angle for adjusting optical fiber collimator 1 and pitch angle.The imaging sensor of digital camera 6 is
CCD or CMOS, photosensitive unit are that linear array or face battle array, lateral resolution are not less than 1k.
Due to avoid front lens 2 from being stain by slurry drops, needing to sweep using protection air-blowing.It is opened in the side of lens sleeve 7
There is semicircle orifice, in the outer eccentricity welding ventilation sleeve of lens sleeve 7.One end of ventilation sleeve is connected to semicircle orifice, comes for making
Enter lens sleeve from the protection gas of the ventilation sleeve；The other end of ventilation sleeve is connected with hose for accessing protection gas.
Gas is protected to enter from rear end, being transferred to 2 front of front lens along ventilation sleeve is purged.
The side semicircle orifice of lens sleeve 7 is set to the lower half portion of the side wall of lens sleeve, is elongated strip shaped through-hole, purpose
It is to allow the protection gas from ventilation sleeve radially into lens sleeve inside, protection lens prevent from staiing.Why adopt
It is to minimize the radial dimension of entire probe with semicircle orifice, ventilation sleeve is eccentric downwards, the only logical protection in lower half portion
The protection gas entrance of gas, sleeve rear end of ventilating also is designed in lower part.Why select to lower part be biased to rather than top, be consider
It is to enter probe from oblique upper on the whole to slurry drops, the protection gas entry design of lens sleeve 7 can be made into protection in lower part
Air-flow is obliquely upward to protecting effect is more notable.
In view of the high temperature of usage scenario may have an impact internal components, an extension casing has also been devised, before
The mode being connected through a screw thread is held to be connected to the rear end of lens sleeve 7.Extension casing is double-layer structure, outer tube 12 and inner tube 11 it
Between be to be passed through the channel of cooling air, cooling air inlet 10 is set to the rear end of outer tube 12；Tail optical fiber, the digital camera of optical fiber collimator 1
Power cord, data line and protection gas hose be arranged in inner tube 11, the rear end of inner tube 11 sets cooling gas outlet.Cooling air
Entering from cooling air inlet 10, the channel between outer tube 12 and inner tube 11 reaches front end, cooling optical fiber collimator 1 and camera 6,
Again probe, and cooled camera power cord, data line, optical fiber and protection gas hose are reversely left along inner tube 11.In addition, extending casing
Can also and increase the length of entire probe, so that probe is can extend into desulphurization system center and measure slurry drops parameter.
Light path arrangement requirement：The focal length for being smaller than the two lens of front lens 2 and rear lens 3, the two lens
Equivalent image space focal plane is located between 3 focal plane of rear lens 2 and rear lens, and the centre bore of disk 4 is located at the image space coke of rear lens 3
Point；The parameter of tight shot 5, which should ensure that, can record front lens 2 and the clear rainbow images at 3 equivalent image space focal plane of rear lens.
The laser level that optical fiber collimator 1 emits passes through the through-hole of rear lens 3, the focus of front lens 2 is converged to by front lens 2, in coke
Drop back warp at point is crossed an internal reflection light beam and is interfered, and forms interference fringe, is collected by front lens 2, change again
For directional light, the centre bore of the disk 4 of 3 focal point of rear lens is disposed through through the meeting of rear lens 3 coalescence, into tight shot 5, and
Clearly whole audience rainbow images are presented on the target surface of digital camera 6.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (7)
1. a kind of compact-sized coaxial-type whole audience rainbow drop measures probe, including light path system and digital camera；Its feature
It is, the light path system includes front lens, rear lens and the disk with centre bore that sequence is mounted in lens sleeve, circle
The digital camera with tight shot is set after disk；One optical fiber collimator for being parallel to lens sleeve axis is fixed on disk side
Edge, transmitting terminal are directed at the through-hole on rear lens；The focal length for being smaller than the two lens of front lens and rear lens, the two
For the equivalent image space focal plane of lens between rear lens and rear lens focal plane, the centre bore of disk is located at the image space of rear lens
Focus；The parameter of tight shot, which should ensure that, can record front lens and the clear rainbow images at the equivalent image space focal plane of rear lens.
2. probe according to claim 1, which is characterized in that the front lens is non-spherical lens, a diameter of D, focal length
For f1, D/f1>0.77；The rear lens are spherical lens, a diameter of D, focal length f2；The diameter d of the through-hole>3mm is located at
At the 0.3D of rear lens center.
3. probe according to claim 1, which is characterized in that front lens and rear lens are embedded in snap ring respectively；It is described
Mirror sleeve cylinder is mounted in by the external screw thread at respective edge in lens sleeve with internal thread, snap ring and disk.
4. according to the probe described in claims 1 to 3 any one, which is characterized in that be provided with half in the side of lens sleeve
Circular hole, in the outer eccentricity welding ventilation sleeve of lens sleeve；One end of ventilation sleeve is connected to semicircle orifice, for making from described
The protection gas of ventilation sleeve enters lens sleeve, and the other end for sleeve of ventilating is connected with hose for accessing protection gas.
5. according to the probe described in claims 1 to 3 any one, which is characterized in that the optical fiber collimator carries can not
The tail optical fiber of separation, and be fixed on the edge of disk by three screws.
6. according to the probe described in claims 1 to 3 any one, which is characterized in that the image sensing of the digital camera
Device is CCD or CMOS, and photosensitive unit is that linear array or face battle array, lateral resolution are not less than 1k.
7. according to the probe described in claims 1 to 3 any one, which is characterized in that further include an extension casing, before
The mode being connected through a screw thread is held to be connected to the rear end of lens sleeve；Extension casing is double-layer structure, is between outer tube and inner tube
It is passed through the channel of cooling air, cooling air inlet is set to the rear end of outer tube；The tail optical fiber of optical fiber collimator and the power cord of digital camera,
Data line is arranged in inner tube, and the rear end of inner tube sets cooling gas outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810233166.6A CN108414408B (en) | 2018-03-21 | 2018-03-21 | Coaxial full-field rainbow liquid drop measuring probe with compact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810233166.6A CN108414408B (en) | 2018-03-21 | 2018-03-21 | Coaxial full-field rainbow liquid drop measuring probe with compact structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108414408A true CN108414408A (en) | 2018-08-17 |
| CN108414408B CN108414408B (en) | 2024-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810233166.6A Active CN108414408B (en) | 2018-03-21 | 2018-03-21 | Coaxial full-field rainbow liquid drop measuring probe with compact structure |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068398A (en) * | 2019-05-08 | 2019-07-30 | 陕西科技大学 | A kind of measuring device and method of the heating of noble metal nano particles solution photo-thermal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068398A (en) * | 2019-05-08 | 2019-07-30 | 陕西科技大学 | A kind of measuring device and method of the heating of noble metal nano particles solution photo-thermal |
| CN110068398B (en) * | 2019-05-08 | 2023-11-24 | 陕西科技大学 | Measuring device and method for photo-thermal temperature rise of noble metal nanoparticle solution |
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| Publication number | Publication date |
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| CN108414408B (en) | 2024-02-20 |
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