CN107782532B - It is a kind of for measuring the test platform of light source smog penetrability - Google Patents
It is a kind of for measuring the test platform of light source smog penetrability Download PDFInfo
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- CN107782532B CN107782532B CN201710784704.6A CN201710784704A CN107782532B CN 107782532 B CN107782532 B CN 107782532B CN 201710784704 A CN201710784704 A CN 201710784704A CN 107782532 B CN107782532 B CN 107782532B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
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Abstract
The invention discloses a kind of for measuring the test platform of light source smog penetrability, including shell, and the shell is respectively equipped with airflow inlet and air stream outlet at the both ends of length direction, is the channel for continuing through test airflow between airflow inlet and air stream outlet；Arc flow distribution plate, level-one homogenizing plate, second level homogenizing plate and scattering light are successively arranged in the shell between airflow inlet and air stream outlet and eliminates plate；The shell is in the two opposite side walls of width direction, and the scattering light between the two side walls eliminates plate and is equipped with the detection hole that position is corresponding and penetrates through along case width direction, it is respectively equipped with the light source to detection hole projection detection light in shell two sides, and receives the visible detection module of detection light.The present invention is quantitatively to propose that the smog penetration capacity index of light source lays the foundation, and provides foundation to design high Penetrating Fog performance light sources.
Description
Technical field
The present invention relates to the simulated experiment fields of lighting apparatus, in particular to a kind of for measuring light source smoke penetration
Test platform.
Background technique
Highway lighting system once comes into operation, and lamps and lanterns will just be in the state of long-term work, and therefore, it is a kind of suitable to select
Light source, be the important link of Lighting Design.In addition, highway lighting will not only comprehensively consider illumination when selecting light source
The adaptability of effect and driver in driving procedure, also require light source can motor vehicle emission formed smog or in have it is good
Good visibility.This has very high requirement to the light efficiency of light source, luminous flux, service life, photochromic, colour rendering and mist transmitting.But
Focus is all only placed on the base lighting safety and EMC Requirements of street lamp by the prior art all the time, and a consideration street lamp exists
The Penetrating Fog performance of illuminating effect under normal weather, light source does not obtain always enough attention.
With the promotion of China's industrialized level, air pollution is further exacerbated by, and haze has become in modern humans society
The problem of can not be ignored；Due to the scattering and absorption of drop and particle for visible light in haze, it will make driver's
Visibility range reduces, so that the original illuminating effect of street lamp be made to have a greatly reduced quality, increase is hidden in the safety of haze weather down train
Suffer from.
For the smog penetration capacity of light source, specific index there is no to measure it in industry, existing Lighting Design
Relevant regulations are not also made to the Penetrating Fog performance of light source in specification.Design side is generally ensured by increasing powerful measure
Lighting safety under the conditions of haze, to cause a large amount of energy waste during lighting system operation.
Fog is full of in experimental enviroment, the variation of light measurement index is currently used measurement before and after measurement light source Penetrating Fog
The means of light source smog penetration capacity, but from the point of view of test platform architecture and a large amount of measured data result, it is existing at present each
The generally existing internal fog uniformity of kind experimental rig is bad, can not eliminate scattering light interferes measurement result, it is true to simulate
The technological deficiencies such as real fog.
Such as application No. is 201110146119.6,201120535618.X, 201320320369.1 Chinese invention patent
In application, do not consider to scatter interference of the light to experimental result.When scattering light refers to that light is propagated in inhomogeneous medium, part
Light deviates the phenomenon that original direction of propagation.During tunnel illumination, the visual information that human eye obtains mostlys come from direct projection
Enter the light of human eye, scattering light is small relative to information content entrained by direct light, although therefore its can be received by human eye, human eye
The position of object can not be judged according to these scattering light, and during actual tests, these scattering light will be by photometric detection
Part receives and impacts to test result, and not set corresponding device is scattered to eliminate in existing mist transmitting pilot system
The interference of light is penetrated, therefore it is not accurate enough to will lead to measurement result, can not react tunnel illuminating system and people under practical smoky environment
The synergistic effect situation of eye.
Meanwhile application No. is the water mist mixing that 201320320369.1 Chinese invention patent application is generated using humidifier
In sprayed from ducts to test cabinet, it is expected that in haze drop and solid granule simulate.Although actual atmospheric haze
It is made of solid, liquid two-phase dispersate, but is more the sulfuric acid as entrained by vehicle exhaust or industrial waste gas in solid particle
Salt, nitrate, ammonium salt and the substances such as insufficient carbon particle that burn, therefore haze component is carried out using water mist mixed dust
Simulation can not really reflect decaying of the light in communication process.Further, since the different regions level of urbanization and industrialized level
Difference, the ratio and particle diameter distribution of each component are also different in practical haze environment, therefore it is required that smoke generating device must
There must be the adjustable function of contaminant component, partial size, otherwise by the popularization of great limiting light source mist transmitting measuring technology.
In addition, application No. is the Chinese invention of 201110146119.6,201120535618.X, 201320320369.1 are special
Test cabinet uses enclosed construction in benefit application, and agitation fan is arranged inside it, to guarantee the uniformity of flue gas in it.But
When theoretically test cabinet uses enclosed construction, inside smoke certainly exists more apparent attached wall phenomenon, although setting fan energy
Smoke adsorption is avoided to a certain extent, but theoretically agitation fan can only make gas motion in test cabinet more violent, it can not
Promote its uniformity.A large amount of measured result proves that the existing generally existing smog uniformity of mist transmitting experimental rig is not simultaneously
Good, reading fluctuates larger problem.
Summary of the invention
Haze is the atmospheric aerosol system that solid by being scattered in atmosphere and liquid particle are constituted.Visible light is at it
The decaying mechanism of middle propagation is predominantly scattered and is absorbed.Wherein, scattering strength is mainly influenced by haze particle diameter, and is absorbed strong
It spends then related with haze particle kind.Therefore, carrying out accurate simulation to the partial size of real atmosphere haze and component is to guarantee light source
The important prerequisite of mist transmitting reliable test result.
The present invention provides a kind of for measuring the test platform of light source smog penetrability, in order to overcome existing Penetrating Fog
Generally existing inside fog uniformity is bad in system safety testing device, can not eliminate scattering light to measurement result interference, Wu Famo
Intend the technological deficiencies such as true fog.
It is a kind of for measuring the test platform of light source smog penetrability, including shell, the shell in length direction two
End is respectively equipped with airflow inlet and air stream outlet, continues through the logical of test airflow between airflow inlet and air stream outlet
Road；
Arc flow distribution plate, level-one homogenizing plate, second level are successively arranged between airflow inlet and air stream outlet in the shell
Homogenizing plate and scattering light eliminate plate；
Scattering light of the shell in the two opposite side walls of width direction and between the two side walls is eliminated to be set on plate
There is position accordingly and along the detection hole of case width direction perforation, is respectively equipped in shell two sides to detection hole projection detection light
Light source, and receive the visible detection module of detection light.
Shell uses communicating structure in the present invention, that is, test airflow is continuously across airflow inlet and air stream outlet when testing.
Provide a kind of test platform based on dynamic test.
Arc flow distribution plate, level-one homogenizing plate, second level homogenizing plate can make test airflow stable allocation, it is often more important that the present invention
Plate is eliminated using scattering light and eliminates scattering light to measurement result interference, improves the accuracy of test.
Chamber, diversion cavity and test are flowed preferably, being followed successively by between airflow inlet and air stream outlet in the shell
Room；
The arc flow distribution plate is two pieces and is oppositely disposed in stream chamber；
The level-one homogenizing plate is arranged in the junction for flowing chamber and diversion cavity；
The second level homogenizing plate is arranged in the junction of diversion cavity and test cabinet；
The scattering light is eliminated plate and is arranged in test cabinet, and the scattering light eliminates plate and arranges along the width direction of shell
There is muti-piece.
The prior art can be used with regard to light source and visible detection module in the present invention, emphasis of the present invention is for the shell
Body and in-built improvement.
Preferably, being additionally provided with the exhaust gas processing device being connected to the air stream outlet of test platform.
Preferably, being additionally provided with haze source for mating test and module occurring, including the hair for containing haze source solution
Raw device, for the gas source to the generator supplies airflow, and connection is in the airflow inlet of the generator and test platform
Between linking pipeline.
In the present invention, the major function of haze source solution is to generate the controllable haze of component, concentration, particle diameter distribution.Subject to
Each component and its distribution in true simulated atmosphere haze, the feature of generated haze can be according to the meteorological data of objective area one
Determine to be adjusted in range, the partial size of generated haze particle can be controlled by adjusting solution concentration, by adjusting gas source pressure
Power controls its concentration.
Preferably, the solute of haze source solution is water-soluble sulfate, nitrate or ammonium salt etc., and bleed pressure is
15~25psi, solution concentration are 6~12g/l.
Preferably, the section (perpendicular to the section in shell length direction) for flowing chamber is in rectangle, rectangle long side is
Case width direction, rectangle short side are body height direction, and the two sidewalls angle of stream chamber width direction is arranged so that flowing chamber
Width is gradually widened.
I.e. along the flow direction of test airflow, the rectangle long side of different parts is sequentially increased, and stream chamber width is gradually widened.
Preferably, the two sidewalls angle for flowing chamber width direction is 50 °~80 °.
As further preferred, to ensure that level-one flows the air-flow even results of chamber, in the section of stream chamber, rectangle short side
Length is w1, unit m, then:
l1For the width for flowing chamber the widest part, also meet l1≥2w1And l1≤ 1.5, unit m；
Flow of the q by test airflow (i.e. generation haze), unit m3/h。
Flow the long side length of rectangle at width i.e. position of chamber the widest part.
Preferably, the radian of the arc flow distribution plate is between 5 °~8 °.
Preferably, the angle that two pieces of arcs shunt between front edge of board tangent line line is 20 °~45 °.
Preferably, on shell length direction, the distance between the front end of the arc flow distribution plate and airflow inlet are
100mm~200mm, distance is 100mm~150mm between the tail end and the homogenizing plate of the arc flow distribution plate.
The front end of the arc flow distribution plate is i.e. towards airflow inlet side, and tail end is i.e. towards air stream outlet side, and in shell
On body length direction, it also generally speaking is understood as the flow direction of test airflow.
In the present invention, the initial pressure that air-flow completes air-flow when passing through level-one homogenizing plate is adjusted, to realize said effect,
Uniform pore openings on the level-one homogenizing plate, percent opening are 30~45%, and aperture is 10mm~20mm.
In the present invention, to further increase uniformity of the air-flow when entering test cabinet, second level homogenizing plate has also been devised.
Preferably, the spacing d of the level-one homogenizing plate and second level homogenizing plate1It should meet:
Wherein, n and d0The percent opening and open pore size of the respectively described level-one homogenizing plate.d0And d1Unit be mm.
Preferably, the second level homogenizing plate percent opening is 15~20%, open pore size is 6mm~14mm.
In the present invention, the rectangular in cross-section of the test cabinet, rectangle long side length is l2, and l2=l1, rectangle bond length
For w2, and w2=w1。l2、w2Unit be m.
Length of the test cabinet along test airflow direction is h1, and h1≥0.5m。
In the present invention, in test cabinet be arranged by muti-piece scattering light eliminate board group at scattering photocontrol module, be to ensure that
The critical component of measurement result accuracy, for eluting gas at guarantee second level homogenizing plate when entering the module with uniform enough,
Preferably, the second level homogenizing plate eliminates plate towards distance d between airflow inlet side with scattering light2Meet:
Wherein, n ' and d0' be respectively the second level homogenizing plate percent opening and open pore size.d0' and d2Unit be mm.
The phenomenon that scattering light is when referring to that light is propagated in inhomogeneous medium, and some light deviates original direction of propagation.It dissipates
The effect for penetrating photocontrol module is to eliminate the scattering light in the other directions that may be irradiated in visible detection module, is retained straight
Penetrate the light in direction, restore human eye under fog environment with the synergistic effect situation of lighting system.
To realize the above effect, preferably, it is rectangular slab that the scattering light, which eliminates plate, and center is provided with the test
Hole, rectangle bond length are w3, and w3=w1；Rectangle long side length is h2, and h2=h1-d2。h1It is test cabinet along airflow direction
Length, preferably, h1Preferably 0.8m~1.2m.w3、h2Unit be m.
For guarantee scattering photocontrol module control effect, preferably, the scattering light eliminate plate be successively arrange and
Several pieces aligned, scattering light eliminate the open pore size d of plate, arrange the rectangle long side length of quantity k and test cabinet section
l2Meet following relationship:
Wherein, d, l2Unit be m.
The present invention is adjusted to means respectively according to principles of fluid mechanics with pressure field, setting promotes cigarette in test cabinet
The uniform module of the dynamic air current of mist stability of concentration；According to Rayleigh's law of scattering and MIE scattering law, setting can be by stray light pair
Test result influence is reduced to 5% scattering light cancellation module below；And the haze source of use component, concentration, size tunable, from
And be that the quantitative smog penetration capacity index for proposing light source lays the foundation, foundation is provided to design high Penetrating Fog performance light sources.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of experiment porch of the present invention；
Fig. 2 is each spot size schematic diagram of experiment porch of the present invention；
Fig. 3 is bleed pressure 20psi, concentration 8gL-1The haze concentration distribution generated of ammonium nitrate mixed solution
With Nanjing day haze actual measurement concentration profiles versus figure；
Fig. 4 is velocity profile of the haze generated after second level homogenizing plate；
Fig. 5 is open pore size when being 10mm, consumption and set scattering light of the scattering photocontrol module to scattering light
Eliminate the relation curve of plate quantity.
Specific embodiment
It is a kind of for measuring the test platform of light source smog penetrability, including shell, institute in the present invention referring to each attached drawing
It states shell and is respectively equipped with airflow inlet and air stream outlet at the both ends of length direction, connect between airflow inlet and air stream outlet
The continuous channel by test airflow；
It is followed successively by between airflow inlet and air stream outlet in shell and flows chamber, diversion cavity and test cabinet；Arc flow distribution plate 6
For two pieces and it is oppositely disposed in stream chamber；Level-one homogenizing plate 7 is arranged in the junction for flowing chamber and diversion cavity；Second level flows
Plate 8 is arranged in the junction of diversion cavity and test cabinet；Scattering light is eliminated plate 9 and is arranged in test cabinet, and is placed with muti-piece.
Scattering light of the shell in the two opposite side walls of width direction and between the two side walls is eliminated to be equipped on plate 9
Position is corresponding and along the detection hole that case width direction penetrates through, and is respectively equipped with the light to detection hole projection detection light in shell two sides
Source 1, and receive the visible detection module 10 of detection light.Visible detection module 10 can be by integrating sphere, spectrometer or light
Color electricity overall analysis system is constituted.
Shell uses communicating structure in the present invention, that is, when testing test airflow continuously across airflow inlet and air stream outlet,
Scattering light eliminates plate 9 and extends to air stream outlet position.
It is additionally provided with haze source and module occurs, including the generator 3 for containing haze source solution, for being mentioned to generator 3
For the gas source 5 of air-flow, gas source 5 is using air compressor machine and is connected to via the pipeline with pressure reducing valve 2 with generator 3, the tube outlet position
Under liquid level and atomizer 4 is installed.
Be equipped between generator 3 and the airflow inlet of test platform and be connected pipeline, by necessary reducer and air-flow into
Mouth linking transition.
Bleed pressure 20psi, concentration 8gL are used in the present embodiment-1Aqueous ammonium nitrate solution is used to the test gas generated
Stream, the distribution of haze concentration can be found in Fig. 3 with Nanjing day haze actual measurement concentration profiles versus, substantially close to wanting mould
Quasi- object.Generated air flow rate is 7.2m3/h。
Arc flow distribution plate 6, level-one homogenizing plate 7 and second level homogenizing plate 8 form the uniform module of dynamic air current, and main function is real
The dynamic equilibrium for now testing indoor air flow, makes haze concentration maintain stable level.It is negative to avoid air-flow from being formed in the cavity
Pressure area, stream chamber rectangular in cross-section, rectangle long side are parallel to detection light transmission direction, and the short side of rectangle flows chamber in level-one
On both side plate, both side plate angle is 60 °.
The long edge air current flow direction flowed between chamber both side plate is sequentially increased, and takes long side full-size l1=0.5m, root
There is w according to formula (1)1>=0.2m, takes w1=0.2m, meets l1≥2w1Restrictive condition.
In the present invention, after haze enters the uniform module of dynamic air current, it can be cut flowing the arc flow distribution plate being arranged in chamber
Weak inlet jet effect, and just sub-distribution is carried out to air-flow.
Arc flow distribution plate has two pieces, is arranged symmetrically flowing in chamber, the recess side of the two is opposite.Arc flow distribution plate is along wind direction
It is bent, in the present embodiment, flow distribution plate radian is 5 °, and the angle between two pieces of flow distribution plate vertex tangent lines is 45 °.
The distance between the front end of arc flow distribution plate and airflow inlet are 100mm, distance between tail end and level-one homogenizing plate
For 150mm.
Level-one homogenizing plate aperture is rounded, aperture 12mm, plate thickness 2mm, percent opening 35%.It can be obtained according to formula (2), with
Second level homogenizing plate spacing d1It should be greater than 200mm, take d1=200mm.
Second level homogenizing plate aperture is rounded, aperture 8mm, plate thickness 2mm, percent opening 15%, can be obtained according to formula (3), with
It scatters light and eliminates plate towards the distance d between airflow inlet side2It should be greater than 300mm, take d2=300mm.
The uniform module of the dynamic air current according to set by this example, after actual measurement, second level homogenizing plate, which goes out to flow flow velocity, to be up to
0.125m·s-1, minimum 0.109ms-1, mean flow rate 0.115ms-1, each air outlet velocity maximum difference is 8.69%, can
Wind speed difference is reduced to 10% hereinafter, there are preferable even results.Velocity flow profile is as shown in Figure 4 at each hole of second level homogenizing plate.
To eliminate interference of the scattering light to experimental result, setting scattering light eliminates plate, a large amount of test datas in test cabinet
Show that scattering light eliminates plate working efficiency by open pore size and lay quantity joint effect, graph of relation is as shown in Figure 5.
Curve show when scatter light eliminate plate quantity be 4~5 pieces when, abatement efficiency have been approached highest, therefore, in the present embodiment
5 blocks of scattering light of setting eliminate plate in test cabinet.It scatters light and eliminates the long w of plate short side3=w1=0.2m, test cabinet are long along airflow direction
Spend h10.8m is taken, then h2=h1-d2=0.5m, test cabinet section long side l2=l1=0.5m then must scatter light according to formula (4) finally
D≤0.013m should be met by eliminating plate detection aperture, consider that the too small relative error that will lead to data in aperture increases, at the same for convenient for
Processing, therefore d=0.01m=10mm is taken in the present embodiment.Fig. 5 shows according to the value in the present embodiment, can will scatter light pair
As a result interference mitigation is to 4% or less.
Disclosed above is only specific embodiments of the present invention, but the present invention is not limited to this, the technology of this field
Various changes and modifications can be made to the invention by personnel without departing from the spirit and scope of the present invention.Obviously these changes and change
Type should belong to the present invention claims protection scope protection in.In addition, although being used some specific terms in this specification,
These terms are merely for convenience of description, does not constitute to the present invention any specifically limited.
Claims (8)
1. a kind of for measuring the test platform of light source smog penetrability, including shell, which is characterized in that the shell is in length
The both ends in direction are respectively equipped with airflow inlet and air stream outlet, continue through test gas between airflow inlet and air stream outlet
The channel of stream；
Arc flow distribution plate, level-one homogenizing plate, second level is successively arranged between airflow inlet and air stream outlet in the shell to flow
Plate and scattering light eliminate plate；
Scattering light of the shell in the two opposite side walls of width direction and between the two side walls, which is eliminated, is equipped with position on plate
Set detection hole corresponding and along the perforation of case width direction；
It is respectively equipped with the light source to detection hole projection detection light in shell two sides, and receives the visible detection mould of detection light
Block；It is followed successively by between airflow inlet and air stream outlet in the shell and flows chamber, diversion cavity and test cabinet；
The arc flow distribution plate is two pieces and is oppositely disposed in stream chamber；
The level-one homogenizing plate is arranged in the junction for flowing chamber and diversion cavity；
The second level homogenizing plate is arranged in the junction of diversion cavity and test cabinet；
The scattering light is eliminated plate and is arranged in test cabinet, and scattering light elimination plate be placed with along the width direction of shell it is more
Block；
The rectangular in cross-section for flowing chamber, rectangle long side are case width direction, and rectangle short side is body height direction, rectangle
Bond length is w1, thenUnit is m；
l1For the width for flowing chamber the widest part, also meet l1≥2w1And l1≤ 1.5, unit m；
Q is the flow of test airflow, unit m3/h。
2. as described in claim 1 for measuring the test platform of light source smog penetrability, which is characterized in that be additionally provided with haze
Module occurs for source, including the generator for containing haze source solution, for the gas source to the generator supplies airflow, and
Connection is connected pipeline between the generator and the airflow inlet of test platform.
3. as described in claim 1 for measuring the test platform of light source smog penetrability, which is characterized in that stream chamber width
The two sidewalls angle in direction is arranged so that stream chamber width is gradually widened, and the two sidewalls angle of stream chamber width direction is 50 °~
80°。
4. as described in claim 1 for measuring the test platform of light source smog penetrability, which is characterized in that the arc point
The radian of flowing plate is between 5 °~8 °；The angle that two pieces of arcs shunt between front edge of board tangent line line is 20 °~45 °.
5. as claimed in claim 4 for measuring the test platform of light source smog penetrability, which is characterized in that in shell length
On direction, the distance between the front end of the arc flow distribution plate and airflow inlet are 100mm~200mm, the arc flow distribution plate
Tail end and the homogenizing plate between distance be 100mm~150mm.
6. as described in claim 1 for measuring the test platform of light source smog penetrability, which is characterized in that the level-one is equal
The spacing d of flowing plate and second level homogenizing plate1Meet:
Wherein, n and d0The percent opening of the respectively described level-one homogenizing plate and aperture
Aperture.
7. as claimed in claim 6 for measuring the test platform of light source smog penetrability, which is characterized in that the second level
Homogenizing plate eliminates plate towards distance d between airflow inlet side with scattering light2It should meet:
Wherein, n ' and d0' be respectively the second level homogenizing plate percent opening and open pore size.
8. as described in claim 1 for measuring the test platform of light source smog penetrability, which is characterized in that the scattering
Light, which eliminates plate detection hole aperture d, to be met:
Wherein, k is that scattering light eliminates plate quantity, l2For the width of test cabinet, unit m.
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| CN109000894B (en) * | 2018-08-02 | 2021-03-26 | 瑞和建设(山东)有限公司 | Smoke penetration performance precision detection device for fire-fighting lamp |
| CN109712501B (en) * | 2018-11-21 | 2024-02-02 | 浙江大学 | Underground traffic conversion channel fire simulation experiment platform |
| CN111077345A (en) * | 2019-12-20 | 2020-04-28 | 西安航天动力研究所 | Mach number calibration method under high-temperature supersonic velocity pure gas flow field environment |
| CN112165358B (en) * | 2020-11-11 | 2023-08-15 | 上海第二工业大学 | Utilize haze of visible light technique to detect car networking |
| WO2023004933A1 (en) * | 2021-07-27 | 2023-02-02 | 浙江大学 | All-weather road surface reflection characteristic detection apparatus and method |
| CN113655030B (en) * | 2021-07-27 | 2022-11-01 | 浙江大学 | Device and method for detecting reflection coefficient of wet pavement |
| CN113670853B (en) * | 2021-07-27 | 2023-03-03 | 浙江大学 | Road surface reflection coefficient detection device and method in haze weather |
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