CN105572005A - Light-scattering-method-based PM2.5 monitor calibration method and device - Google Patents
Light-scattering-method-based PM2.5 monitor calibration method and device Download PDFInfo
- Publication number
- CN105572005A CN105572005A CN201510990490.9A CN201510990490A CN105572005A CN 105572005 A CN105572005 A CN 105572005A CN 201510990490 A CN201510990490 A CN 201510990490A CN 105572005 A CN105572005 A CN 105572005A
- Authority
- CN
- China
- Prior art keywords
- monitor
- escape pipe
- light
- tested
- draft tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000000790 scattering method Methods 0.000 title abstract 4
- 239000002245 particle Substances 0.000 claims abstract description 50
- 239000000443 aerosol Substances 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims description 20
- 230000003287 optical effect Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 9
- 230000000153 supplemental effect Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000001186 cumulative effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 36
- 238000005259 measurement Methods 0.000 description 6
- 239000013589 supplement Substances 0.000 description 6
- 101100323157 Arabidopsis thaliana LAP1 gene Proteins 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000001502 supplementing effect Effects 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
- G01N15/06—Investigating concentration of particle suspensions
-
- 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
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides a light-scattering-method-based PM2.5 monitor calibration method and device, and relates to the measuring technology. A light scattering signal generated by an aerosol particle group is converted into an electrical signal; total aerosol particle mass can be obtained according to direct proportion relation of cumulative voltage and cumulative mass of the aerosol particle group; a sample volume of a to-be-tested PM2.5 monitor is used as a standard volume, and standard mass concentration can be obtained according to the ratio of the total aerosol particle mass and the standard volume; an error value of a concentration display value of the to-be-tested PM2.5 monitor and the standard mass concentration is read by comparison, and a test result is judged. The light-scattering-method-based PM2.5 monitor calibration method solves the technical problems of complex calibration process, low calibration efficiency, difficulty in trace to the source of quality benchmark technology of PM2.5 monitors in the prior art. The beneficial effects are as follows: fast measuring speed, high sensitivity and accurate detection. Operation is simple and time saving, detection efficiency is improved, the light-scattering-method-based PM2.5 monitor calibration method is capable of tracing to the source of quality benchmark, can achieve online calibration, and saves testing costs, and the calibration device is reasonable in structure, low in cost, and easy to maintain.
Description
Technical field
The present invention relates to technical field of measurement and test, especially relate to a kind of method and apparatus for PM2.5 monitor concentration calibration.
Background technology
Particle (particulatematter) PM2.5 refers to the particle of aerodynamics equivalent diameter≤2.5 in surrounding air μm, also referred to as fine particle.PM2.5 in air can cause very major injury by lower respiratory tract to health.In addition one of major reason of producing of PM2.5 or Brownish haze, when PM2.5 mass concentration is more than 75 μ g/m3, causes visibility to reduce, occurs gray haze phenomenon, affect normal traffic and life.Current all parts of the country are all in the buying of the construction and PM2.5 monitoring equipment of carrying out air quality monitoring station, and some areas have started externally to announce PM2.5 annual average data.China does not put into effect respective standard for PM2.5 automatic monitor, on market the automatic monitor measuring principle of main flow and performance index also not quite identical.Some import instruments are by automatic equivalent method (EQPM) certification of Environmental Protection Agency (USEPA), and domestic instrument does not then have relevant authentication or instrument performance to prove.Because PM2.5 monitoring technology there are differences, different principle PM2.5 automatic monitor performance index are inconsistent.Current PM2.5 automatic monitor adopts filter membrane weight method to calibrate mostly.Weight method needs more than 18h cumulative measurement, and through 24h balance, the single measurement time is long, and operating process is loaded down with trivial details, inefficiency.Chinese patent application publication No. CN104020089A, on September 3 2014 Shen Qing Publication day, the application for a patent for invention file that name is called " a kind of PM2.5 monitor calibration steps ", provides a kind of PM2.5 monitor calibration steps.It comprises the steps: that aerosol generator prepares the gasoloid of different size, and the blending bin entering its pipeline respectively by every bar respective channel mixes with pure air, by the aerosol dilution of generation to desired concn; Shunt after the gasoloid diluted enters public pipeline, a part is by PM25 monitor, the aerocolloidal concentration of repetitive measurement PM2.5 is also averaged, and another part is successively by preposition particle diameter spectrometer, PM25 cutter and rearmounted particle diameter spectrometer, and the aerocolloidal concentration of repetitive measurement PM25 is also averaged; By comparing the mean value of two pipelines, PM25 monitor is calibrated.This calibration is that the mode adopting particle diameter spectrometer to measure aerosol concentration calibrates PM2.5 monitor, and need two particle diameter spectrometers, cost is higher.Particle diameter spectrometer and PM2.5 monitor lay respectively in two pipelines, and because blending bin aerosol concentration out exists random fluctuation, after reaching two pipelines, the inconsistent calibration result that will cause of CONCENTRATION STATE produces deviation.
Summary of the invention
PM2.5 monitor calibration process complexity is there is in order to solve prior art, calibration efficiency is low, be difficult to the technical matters being traceable to quality criteria, the invention provides a kind of PM2.5 monitor calibrating installation based on light scattering method and method, reach and realize real-time online measuring, measuring speed is fast, highly sensitive, reproducible, cost is low, can the object of METHOD FOR CONTINUOUS DETERMINATION.
Technical scheme of the present invention is: a kind of PM2.5 monitor calibration steps based on light scattering method, it comprises the following steps: the gasoloid gas flow of Y direction and the laser beam of X-direction intersect vertically and form photosensitive area, light signal to photomultiplier, is converted into electric signal through Z-direction spherical reflector reflecting focal by the scattered light that the aerosol particle group in photosensitive area produces; According to accumulation voltage and the proportional gross mass obtaining aerosol particle of aerosol particle group accumulated quality; Using the sampling volume of tested PM2.5 monitor as standard volume, aerosol particle thing gross mass obtains standard quality concentration with the ratio of standard volume; Read the concentration displayed value of tested PM2.5 monitor, compare with standard quality concentration and obtain error amount; Judge that whether tested PM2.5 monitor is qualified by error amount.The method calibration PM2.5 monitor mass concentration value of particle mass concentration is measured based on light scattering technique, highly sensitive, detect accurately; Detection speed is fast, simple to operately saves time, and improves detection efficiency; Can trace to the source to quality criteria, can be implemented in line calibration, save testing cost.
As preferably, the laser beam in photosensitive area is in-line light beam; Good signal to noise ratio (S/N ratio) can be obtained.
As preferably, gasoloid gas flow is wrapped with sheath gas; Avoid aerosol particle thing to glue wall and cause particle loss, guarantee to detect accurately.
As preferably, gasoloid gas flow enters tested PM2.5 monitor and also has make-up gas to enter simultaneously; Make airshed constant, guarantee to detect accurately.
As preferably, laser instrument is semiconductor laser, and emissive power is 8-15mW; The scope of larger measurement of concetration can be obtained.
A kind of PM2.5 monitor calibrating installation based on light scattering method, it comprises the monodisperse aerosol generator, detection module, the mixing chamber that connect successively, detection module is provided with escape pipe I, mixing chamber is provided with escape pipe II, escape pipe I inserts in escape pipe II and escape pipe I outer wall and escape pipe II inwall leave gap, escape pipe II side mixing chamber is also provided with supplementary gas draft tube, escape pipe II is connected with tested PM2.5 monitor, and tested PM2.5 monitor is connected with aspiration pump; Simple and reasonable, cost is low, be convenient to safeguard.
As preferably, detection module is connected with gasoloid draft tube, and the air intake opening of gasoloid draft tube is connected with diluter, and diluter is communicated with monodisperse aerosol generator, the outer wall of gasoloid draft tube is provided with sheath gas draft tube, and sheath gas draft tube is connected with sheath airshed controller.
As preferably, supplement gas draft tube and be connected with supplemental air flow amount controller.
As preferably, the difference of escape pipe II internal diameter and escape pipe I external diameter is 16mm-20mm; It is 10-15mm that escape pipe I inserts escape pipe II degree of depth.
As preferably, detection module comprises: optical scattering chamber and light generating unit, and optical scattering chamber is provided with the anti-reflection mirror of arrangement being aligned, a pair second diaphragms and light trapping, and the second diaphragm both sides are respectively equipped with spherical reflector and photomultiplier; Light generating unit is provided with the laser instrument, beam expanding lens, the first diaphragm and the cylindrical mirror that are arranged in order.
Compared with prior art, the invention has the beneficial effects as follows: the method calibration PM2.5 monitor mass concentration value measuring particle mass concentration based on light scattering technique, measuring speed is fast, highly sensitive, detection is accurate.Simple to operately to save time, improve detection efficiency.Can trace to the source to quality criteria, realize on-line calibration, save testing cost.Based on the calibrating installation that this method is built, simple and reasonable, cost is low, be convenient to safeguard.
Accompanying drawing explanation
Accompanying drawing 1 is connection diagram of the present invention;
Accompanying drawing 2 is that in Fig. 1, A-A analyses and observe connection diagram.
In figure: 1-monodisperse aerosol generator; 2-diluter; 3-detection module; 4-mixing chamber; The tested PM2.5 monitor of 5-; 6-extraction flow meter; 7-aspiration pump; 8-data collecting card; 9-computer; 31-optical scattering chamber; 32-light generating unit; 33-photosensitive area; 41-escape pipe II; 42-supplements gas draft tube; 43-supplemental air flow amount controller; 311-gasoloid draft tube; 312-escape pipe I; 313-sheath gas draft tube; 314-sheath airshed controller; 321-laser instrument; 322-beam expanding lens; 323-first diaphragm; 324-cylindrical mirror; 325-is anti-reflection mirror; 326-second diaphragm; 327-light trapping; 328-spherical reflector; 329-photomultiplier.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1:
As illustrated in fig. 1 and 2, a kind of PM2.5 monitor calibrating installation based on light scattering method, it comprises the monodisperse aerosol generator 1, detection module 3, the mixing chamber 4 that connect successively.In Fig. 1, above-below direction is Y direction; Left and right directions is X-direction; In Fig. 2, above-below direction is Z-direction, and after top is, below is front.In figure: have the double dot dash line of arrow to represent air-flow; The fine line of right arrow represents light path.Detection module 3 comprises: optical scattering chamber 31 and light generating unit 32.Optical scattering chamber 31 is seal chamber structure.Optical scattering chamber 31 is provided with the anti-reflection mirror 325 of arrangement being aligned, a pair second diaphragms 326 and light trapping 327 in X-direction.Second diaphragm 326 both sides are respectively equipped with spherical reflector 328 and photomultiplier 329.Spherical reflector 328 and photomultiplier 329 are located at Z-direction.Anti-reflection mirror 325 and light trapping 327 are located on the left and right wall in optical scattering chamber 31 respectively.Second diaphragm 326, spherical reflector 328 and photomultiplier 329 are located in the cavity in optical scattering chamber 31.The sensitive face of electricity multiplier tube 329 is relative with spherical reflector 328.Electricity multiplier tube 329 is electrically connected with data collecting card 8, and data collecting card 8 is electrically connected with computer 9.Data collecting card 8, computer 9 are positioned at outside the cavity in optical scattering chamber 31.Light generating unit 32 is provided with the laser instrument 321, beam expanding lens 322, first diaphragm 323 and the cylindrical mirror 324 that are arranged in order.Light generating unit 32 is positioned at the outer left side of cavity in optical scattering chamber 31.Detection module 3 is connected with gasoloid draft tube 311, and the air intake opening of gasoloid draft tube 311 is connected with diluter 2.Diluter 2 is communicated with monodisperse aerosol generator 1.The outer wall of gasoloid draft tube 311 is provided with sheath gas draft tube 313.Sheath gas draft tube 313 is connected with sheath airshed controller 314.Sheath airshed controller 314 is communicated with sheath gas generator (not shown).Detection module 3 is provided with escape pipe I 312.Gasoloid draft tube 311 and escape pipe I 312 are positioned at Y direction and axis overlaps.The lower end of gasoloid draft tube 311 is fixedly communicated with in cavity with the upper wall in optical scattering chamber 31.The upper end of gasoloid draft tube 311 is communicated with diluter 2, and diluter 2 is communicated with monodisperse aerosol generator 1.The upper end of escape pipe I 312 is fixedly communicated with in cavity with the lower wall in optical scattering chamber 31.Mixing chamber 4 is seal chamber structure.Mixing chamber 4 is provided with escape pipe II 41.Escape pipe II 41 moves towards as Y direction.Escape pipe II 41 is positioned at mixing chamber 4 cavity through mixing chamber 4 lower wall upper end.Escape pipe II 41 is connected with tested PM2.5 monitor 5.Tested PM2.5 monitor 5 is connected with aspiration pump 7.Escape pipe II 41 lower end is communicated with the air intake opening of tested PM2.5 monitor 5.The gas outlet of tested PM2.5 monitor 5 connects aspiration pump 7.Extraction flow meter 6 is serially connected with between tested PM2.5 monitor 5 and aspiration pump 7.Escape pipe I 312 inserts in escape pipe II 41 and escape pipe I 312 outer wall and escape pipe II 41 inwall leave gap.The lower end of escape pipe I 312 inserts escape pipe II 41 through mixing chamber 4 upper wall in mixing chamber 4.Escape pipe I 312 overlaps with escape pipe II 41 axis.The difference of escape pipe II 41 internal diameter and escape pipe I 312 external diameter is 20mm.It is 15mm that escape pipe I 312 inserts escape pipe II 41 degree of depth.Escape pipe II 41 side mixing chamber 4 is also provided with supplementary gas draft tube 42.Supplement gas draft tube 42 and be connected with supplemental air flow amount controller 43.Supplement gas draft tube 42 to move towards as X-direction or Z-direction, the present embodiment illustrates for X-direction.Supplement gas draft tube 42 right-hand member to be fixedly communicated with in cavity with the left wall of mixing chamber 4.Supplement gas draft tube 42 left end and be communicated with supplemental air flow amount controller 43, supplemental air flow amount controller 43 is communicated with supplementary gas generator (not shown).
Based on a PM2.5 monitor calibration steps for light scattering method, it comprises the following steps:
Laser instrument 321 is semiconductor laser, and emissive power is 15mW.In X-direction, the light beam that laser instrument 321 sends is successively through beam expanding lens 322, first diaphragm 323, cylindrical mirror 324, optical scattering chamber 31 is entered from anti-reflection mirror 325, absorbed by light trapping 327 through a pair second diaphragms 326, the laser beam between a pair second diaphragms 326 is formed as in-line light beam again.In order to obtain good signal to noise ratio (S/N ratio), in-line beam thickness controls be less than 300 μm.In Y direction, there is gasoloid in monodisperse aerosol generator 1, diluted by diluter 2, and gasoloid gas flow enters optical scattering chamber 31 through gasoloid draft tube 311.Gasoloid gas flow flows out from escape pipe I 312 through laser beam, enters escape pipe II 41 entrance in mixing chamber 4.Gasoloid gas flow flows out from escape pipe II 41 and enters tested PM2.5 monitor 5, is retracted to air through extraction flow meter 6 by aspiration pump 7.Opening monodisperse aerosol generator 1 simultaneously, open sheath airshed controller 314, sheath gas enters optical scattering chamber 31 by sheath gas draft tube 313, and sheath gas bag wraps up in gasoloid gas flow.Opening monodisperse aerosol generator 1 simultaneously, open supplemental air flow amount controller 43.Make-up gas is high pure nitrogen.Make-up gas enters mixing chamber 4 by supplementing gas draft tube 42 and arrives escape pipe II 41 entrance, forms protection air-casing around gasoloid gas flow.Make-up gas and gasoloid gas flow enter tested PM2.5 monitor 5 simultaneously.In optical scattering chamber 31, the gasoloid gas flow of Y direction and the laser beam of X-direction intersect vertically and form photosensitive area 33.The scattered light that aerosol particle group in photosensitive area 33 produces is through the sensitive face of Z-direction spherical reflector 328 reflecting focal to photomultiplier 329.The light signal detected is converted into electric signal by photomultiplier 329, is then transferred to data collecting card 8.
According to accumulation voltage and the proportional gross mass obtaining aerosol particle of aerosol particle group accumulated quality.According to Mie scattering theory, when the particle diameter of scattering particles thing is less, the expression formula of the scattered light intensity of Mie scattering is approximate to be written as:
in formula: θ is scattering angle; Is (θ) is the scattered light on θ direction; I
0for the intensity of incident light; D is the diameter of particle; M is refractive index.When particle concentration is less, be equivalent to single particle by photosensitive area, each particle produces scattered light pulse signal.When system one timing, scattered light intensity and d
4be directly proportional.By detection scattered light intensity, obtain the size of particle diameter.By count pulse number, obtain Particle number concentration.When particle concentration is higher, in particle swarm, the scattered light of each particle is superimposed, namely
the pass of its number concentration N and mass concentration W quality inspection is
Obtained by above-mentioned
Definition C is:
when measuring system one timing, the space multistory angle of the wavelength of incident light, the intensity of incident light and scattered light receiving system is definite value.Now, for the particle of the same particle size of same material, C can be regarded as a constant.In optical scattering chamber 31, now, the particle swarm be made up of the particle of the same particle size of same material passes through by the photosensitive area of light source irradiation, in particle swarm, the scattered light intensity of the scattered light superposition of each particle is directly proportional to particle swarm mass concentration: i.e. I=CW, in formula: C can be a constant, I is scattered light intensity, W is particle swarm mass concentration.Mass concentration refers to the quality of unit volume endoparticle thing, and W can be expressed as: W=M/V, in formula: M is Sampling particles material amount, and V is sampling volume.Wherein V can be expressed as V=Q*t, namely sampling flow and the sampling time long-pending.Then can obtain: I=CM/Qt and I*Q*t=CM.When to get the sampling time be Δ t, corresponding formula is I*Q* Δ t=C Δ M.When flow is definite value, integration is got to above formula both sides and obtains: Q* ∑ I=C ∑ M, in formula ∑ I for accumulative light intensity, ∑ M be accumulated quality.Be constant based on Q and C, accumulative light intensity ∑ I is directly proportional to accumulated quality ∑ M, and in measuring system, scattered light intensity converts scattering voltage to through photo-electric conversion element, and scattered light intensity is directly proportional to scattering voltage.So accumulation voltage ∑ U is directly proportional to accumulated quality ∑ M, i.e. ∑ M=K ∑ U.Wherein, the quality demarcation that conversion coefficient K is obtained by accumulation voltage and filter membrane weight method obtains.Sheath airshed controller 314 and supplemental air flow amount controller 43 are set, make sheath airshed and supplemental air flow amount sum be greater than tested PM2.5 monitor 5 working point flow.Sheath airshed is set to fixed value, control supplemental air flow amount controller, it is fixed value that the numerical value that extraction flow meter 6 is read deducts make-up gas flow, ensures that the gasoloid charge flow rate entering optical scattering chamber 31 is fixed value, thus ensure that ∑ M=K ∑ U.The data transmitted by photomultiplier 329 in computer 9 image data capture card 8, through computer disposal, obtain aerosol particle group accumulation voltage.Then the gross mass of aerosol particle is obtained according to ∑ M=K ∑ U.
Using the sampling volume of tested PM2.5 monitor 5 as standard volume.Aerosol particle thing gross mass obtains standard quality concentration with the ratio of standard volume.
Read the concentration displayed value of tested PM2.5 monitor 5.The concentration displayed value of tested PM2.5 monitor 5 is compared with standard quality concentration and obtains error amount.
By error amount control test standard, judge that whether tested PM2.5 monitor 5 is qualified.
Claims (10)
1. the PM2.5 monitor calibration steps based on light scattering method, it is characterized in that, it comprises the following steps: the gasoloid gas flow of Y direction and the laser beam of X-direction intersect vertically and form photosensitive area (33), light signal to photomultiplier (329), is converted into electric signal through Z-direction spherical reflector (328) reflecting focal by the scattered light produced the aerosol particle group of photosensitive area (33); According to accumulation voltage and the proportional gross mass obtaining aerosol particle of aerosol particle group accumulated quality; Using the sampling volume of tested PM2.5 monitor (5) as standard volume, aerosol particle thing gross mass obtains standard quality concentration with the ratio of standard volume; Read the concentration displayed value of tested PM2.5 monitor (5), compare with standard quality concentration and obtain error amount; Judge that whether tested PM2.5 monitor (5) is qualified by error amount.
2. a kind of PM2.5 monitor calibration steps based on light scattering method according to claim 1, is characterized in that: be in-line light beam at the laser beam of photosensitive area (33).
3. a kind of PM2.5 monitor calibration steps based on light scattering method according to claim 1, is characterized in that: gasoloid gas flow is wrapped with sheath gas.
4. a kind of PM2.5 monitor calibration steps based on light scattering method according to claim 1, is characterized in that: gasoloid gas flow enters also has make-up gas to enter tested PM2.5 monitor (5) simultaneously.
5. a kind of PM2.5 monitor calibration steps based on light scattering method according to claim 1, it is characterized in that: laser instrument (321) is semiconductor laser, emissive power is 8-15mW.
6. a kind of PM2.5 monitor calibrating installation based on light scattering method according to claim 1, it comprises the monodisperse aerosol generator (1) connected successively, detection module (3), mixing chamber (4), it is characterized in that: described detection module (3) is provided with escape pipe I (312), mixing chamber (4) is provided with escape pipe II (41), described escape pipe I (312) inserts in escape pipe II (41) and escape pipe I (312) outer wall and escape pipe II (41) inwall leave gap, escape pipe II (41) side mixing chamber (4) is also provided with supplementary gas draft tube (42), described escape pipe II (41) is connected with tested PM2.5 monitor (5), tested PM2.5 monitor (5) is connected with aspiration pump (7).
7. a kind of PM2.5 monitor calibrating installation based on light scattering method according to claim 6, it is characterized in that: described detection module (3) is connected with gasoloid draft tube (311), the air intake opening of gasoloid draft tube (311) is connected with diluter (2), diluter (2) is communicated with described monodisperse aerosol generator (1), the outer wall of described gasoloid draft tube (311) is provided with sheath gas draft tube (313), and sheath gas draft tube (313) is connected with sheath airshed controller (314).
8. a kind of PM2.5 monitor calibrating installation based on light scattering method according to claim 6, is characterized in that: described supplementary gas draft tube (42) is connected with supplemental air flow amount controller (43).
9. a kind of PM2.5 monitor calibrating installation based on light scattering method according to claim 6, is characterized in that: the difference of described escape pipe II (41) internal diameter and escape pipe I (312) external diameter is 16mm-20mm; It is 10-15mm that escape pipe I (312) inserts escape pipe II (41) degree of depth.
10. a kind of PM2.5 monitor calibrating installation based on light scattering method according to claim 6, it is characterized in that: described detection module (3) comprising: optical scattering chamber (31) and light generating unit (32), optical scattering chamber (31) is provided with the anti-reflection mirror (325) of arrangement being aligned, a pair second diaphragms (326) and light trapping (327), and the second diaphragm (326) both sides are respectively equipped with spherical reflector (328) and photomultiplier (329); Light generating unit (32) is provided with the laser instrument (321), beam expanding lens (322), the first diaphragm (323) and the cylindrical mirror (324) that are arranged in order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510990490.9A CN105572005A (en) | 2015-12-24 | 2015-12-24 | Light-scattering-method-based PM2.5 monitor calibration method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510990490.9A CN105572005A (en) | 2015-12-24 | 2015-12-24 | Light-scattering-method-based PM2.5 monitor calibration method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105572005A true CN105572005A (en) | 2016-05-11 |
Family
ID=55882390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510990490.9A Pending CN105572005A (en) | 2015-12-24 | 2015-12-24 | Light-scattering-method-based PM2.5 monitor calibration method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105572005A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483052A (en) * | 2016-10-08 | 2017-03-08 | 北京信息科技大学 | A kind of PM2.5 detector based on light scattering method |
| CN106769722A (en) * | 2016-11-24 | 2017-05-31 | 深圳市翠云谷科技有限公司 | Zero calibration of particle phase concentration monitor, span and method for calibrating measuring range |
| CN107917861A (en) * | 2017-11-27 | 2018-04-17 | 清远市新中科检测有限公司 | The detection method of pellet PM10 in room air |
| CN108120659A (en) * | 2017-12-01 | 2018-06-05 | 上海先积集成电路有限公司 | A kind of particle concentration detecting system and method having from zero calibration |
| CN109781598A (en) * | 2019-03-29 | 2019-05-21 | 西安鼎研科技股份有限公司 | A kind of measuring concentration of granules in certain device and method using white LED light source |
| CN110662952A (en) * | 2017-04-17 | 2020-01-07 | Tsi有限公司 | Particulate matter sensor and method thereof |
| CN112284988A (en) * | 2020-10-15 | 2021-01-29 | 东北大学 | Device and method for measuring equivalent diameter of particle group |
| CN112782123A (en) * | 2020-12-24 | 2021-05-11 | 中国科学院合肥物质科学研究院 | System and method for comprehensively detecting atmospheric optical key parameters based on unmanned aerial vehicle technology |
| CN113504166A (en) * | 2021-06-25 | 2021-10-15 | 青岛众瑞智能仪器股份有限公司 | Aerosol concentration detection method, device and system |
| CN113720738A (en) * | 2021-09-03 | 2021-11-30 | 上海交通大学 | Optimized calibration method for aerosol mass concentration |
| CN114577690A (en) * | 2022-03-08 | 2022-06-03 | 杭州云斐科技有限公司 | Particulate matter concentration detection device |
| CN114813494A (en) * | 2022-06-24 | 2022-07-29 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Application of carbon nanospheres and calibration method of PM2.5 mass concentration determinator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005049228A (en) * | 2003-07-29 | 2005-02-24 | Toto Ltd | Aerosol particle concentration measuring method, device, and composite structure manufacturing device equipped therewith |
| CN201355339Y (en) * | 2008-07-18 | 2009-12-02 | 上海市计量测试技术研究院 | Calibration device of automatic atmospheric particulate matter monitoring system |
| CN203949849U (en) * | 2014-07-21 | 2014-11-19 | 青岛众瑞智能仪器有限公司 | A kind of pick-up unit of measuring particle quality concentration |
| CN104697912A (en) * | 2015-03-13 | 2015-06-10 | 上海钧谐电子科技有限公司 | PM2.5 detector and detection method thereof |
| US20170097294A1 (en) * | 2014-06-10 | 2017-04-06 | Koninklijke Philips N.V. | Aerosol sensor and sensing method |
-
2015
- 2015-12-24 CN CN201510990490.9A patent/CN105572005A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005049228A (en) * | 2003-07-29 | 2005-02-24 | Toto Ltd | Aerosol particle concentration measuring method, device, and composite structure manufacturing device equipped therewith |
| CN201355339Y (en) * | 2008-07-18 | 2009-12-02 | 上海市计量测试技术研究院 | Calibration device of automatic atmospheric particulate matter monitoring system |
| US20170097294A1 (en) * | 2014-06-10 | 2017-04-06 | Koninklijke Philips N.V. | Aerosol sensor and sensing method |
| CN203949849U (en) * | 2014-07-21 | 2014-11-19 | 青岛众瑞智能仪器有限公司 | A kind of pick-up unit of measuring particle quality concentration |
| CN104697912A (en) * | 2015-03-13 | 2015-06-10 | 上海钧谐电子科技有限公司 | PM2.5 detector and detection method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴芳: "颗粒物发生装置与检定系统研究", 《浙江大学硕士专业学位论文》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483052A (en) * | 2016-10-08 | 2017-03-08 | 北京信息科技大学 | A kind of PM2.5 detector based on light scattering method |
| CN106769722A (en) * | 2016-11-24 | 2017-05-31 | 深圳市翠云谷科技有限公司 | Zero calibration of particle phase concentration monitor, span and method for calibrating measuring range |
| CN106769722B (en) * | 2016-11-24 | 2019-03-01 | 深圳市翠云谷科技有限公司 | Zero calibration, span and the method for calibrating measuring range of particle phase concentration monitor |
| CN110662952B (en) * | 2017-04-17 | 2022-09-06 | Tsi有限公司 | Particulate matter sensor and method thereof |
| CN110662952A (en) * | 2017-04-17 | 2020-01-07 | Tsi有限公司 | Particulate matter sensor and method thereof |
| US11604131B2 (en) | 2017-04-17 | 2023-03-14 | Tsi Incorporated | Particulate matter sensor and method therefor |
| CN107917861A (en) * | 2017-11-27 | 2018-04-17 | 清远市新中科检测有限公司 | The detection method of pellet PM10 in room air |
| CN108120659A (en) * | 2017-12-01 | 2018-06-05 | 上海先积集成电路有限公司 | A kind of particle concentration detecting system and method having from zero calibration |
| CN109781598A (en) * | 2019-03-29 | 2019-05-21 | 西安鼎研科技股份有限公司 | A kind of measuring concentration of granules in certain device and method using white LED light source |
| CN112284988A (en) * | 2020-10-15 | 2021-01-29 | 东北大学 | Device and method for measuring equivalent diameter of particle group |
| CN112782123A (en) * | 2020-12-24 | 2021-05-11 | 中国科学院合肥物质科学研究院 | System and method for comprehensively detecting atmospheric optical key parameters based on unmanned aerial vehicle technology |
| CN113504166A (en) * | 2021-06-25 | 2021-10-15 | 青岛众瑞智能仪器股份有限公司 | Aerosol concentration detection method, device and system |
| CN113504166B (en) * | 2021-06-25 | 2023-08-08 | 青岛众瑞智能仪器股份有限公司 | Aerosol concentration detection method, device and system |
| CN113720738A (en) * | 2021-09-03 | 2021-11-30 | 上海交通大学 | Optimized calibration method for aerosol mass concentration |
| CN114577690A (en) * | 2022-03-08 | 2022-06-03 | 杭州云斐科技有限公司 | Particulate matter concentration detection device |
| CN114813494A (en) * | 2022-06-24 | 2022-07-29 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Application of carbon nanospheres and calibration method of PM2.5 mass concentration determinator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105572005A (en) | Light-scattering-method-based PM2.5 monitor calibration method and device | |
| CN103983544B (en) | Hyperchannel aerosol scattering absorption measuring apparatus | |
| CN105334144B (en) | A kind of monodisperse aerosol grain size and apparatus for measuring concentration based on light scattering | |
| Stolzenburg et al. | A DMA-train for precision measurement of sub-10 nm aerosol dynamics | |
| CN102262071B (en) | In-situ measurement device and measurement method of scattering coefficient spectrum of atmospheric aerosol | |
| CN103712777B (en) | Detect device and the detection method of ultraviolet light photo imaging system performance parameter | |
| GB2475458A (en) | Device for measuring physical property of particle | |
| CN105067564B (en) | A kind of optical fiber gas concentration detection method with temperature compensation capability | |
| CN101256140A (en) | Portable apparatus and measuring method for monitoring gas concentration of sulphur dioxide and nitrous oxide meanwhile | |
| CN108827843B (en) | Device and method for measuring mass concentration and particle size spectrum of particulate matters of fixed pollution source | |
| CN108287126B (en) | Nanoparticle size measurement system | |
| CN106018193A (en) | Light scattering measurement system and method for particulate matters | |
| CN106872402A (en) | Gas-detecting device and method based on super continuous spectrums laser | |
| CN104833816B (en) | Laser Doppler speed measuring device and its speed-measuring method based on rotating grating | |
| CN103499391A (en) | Spectrum measuring system | |
| CN103308280A (en) | Quantum efficiency calibration device and calibrating method for CCD (charge coupled device) | |
| CN101122555A (en) | High concentration super fine granule measuring device and method based on backward photon related spectrum | |
| CN105043930A (en) | Detection device and method for metal steam atomic density of microstructure alkali metal gas chambers | |
| CN201622228U (en) | Dynamic polarized light scattered grain measuring device | |
| CN205539338U (en) | Ultraviolet fluorescence detection device of eccentric structure | |
| CN103105360B (en) | A kind of ozone concentration instrument surveying micro-concentrations | |
| CN112557269A (en) | Probing type receiving and transmitting integrated optical fiber dust concentration measuring device and method | |
| CN205103129U (en) | Novel particulate matter sensor | |
| CN216082480U (en) | Aerosol concentration detection device and system | |
| CN201277938Y (en) | Single-beam double-lens laser particle analyzer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160511 |
|
| WD01 | Invention patent application deemed withdrawn after publication |