CN205280540U - Miniature dull and stereotyped atmosphere fine particle of integrative integrated form register for easy reference measuring device - Google Patents
Miniature dull and stereotyped atmosphere fine particle of integrative integrated form register for easy reference measuring device Download PDFInfo
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Abstract
The utility model provides a miniature dull and stereotyped atmosphere fine particle of integrative integrated form register for easy reference measuring device, include mainly by first top panel, first panel, collets, carry on one's shoulder or back electric bottom electrode, the needle point, the electric module of the dull and stereotyped lotus of unipolarity that unipolarity high -voltage power supply and sheath gas air inlet are constituteed, mainly by first swash plate, the second swash plate, the second top panel, second panel, the intermediate washer, the sound spout, symmetry sample gas air inlet, the laminar flow piece, go up the separate mesh electrode, lower separate mesh electrode, hierarchical sample gas gas outlet, faraday cup, hierarchical and the inverting module of particulate matter that first sensitive electrode and second sensitive electrode are constituteed, the special device is composed of a controller, scanning voltage circuit, the little current detection and the signal processing module of vacuum pump and drive circuit and little current detection device constitution. The utility model discloses simple structure can realize integrative integration, and the on line measurement who sets to music for miniaturized hand -held type atmosphere fine particle provides technical guarantee.
Description
Technical field
This utility model relates to atmospheric environment fine particle detection technique field, and specifically one integrates formula miniature plate Fine Particles spectrometry device.
Background technology
Recently as the continuous rising of living standard, air-polluting constantly worsens, and people invest this block of environmental pollution sight gradually, to publilc health growing interest, especially become especially to pay attention to the particulate matter in atmospheric environment. Although fine particle is the component that in earth atmosphere composition, content is little, but air quality and visibility etc. are had important impact by it. Research shows, the more little harm to health of granule is more big. Fine particle can waft to place farther out simultaneously, and coverage is relatively big, therefore is necessary particulate matter is carried out classification when measuring particle concentration.
The method that commonly used light scattering and aerodynamic flight time measurement combine in the world at present is to realize the measurement of light scattering particle diameter or aerodynamic size, such as optical particle counter/aerodynamic size spectrometer, but all it is difficult to the Fine Particles measuring particle diameter at below 300nm. For the particle diameter grain diameter measurement at the Fine Particles of below 100nm, in the world mainly through charged particle electromigration characteristic in the electric field, different according to different-size particles electromobility, realize the classification of particle diameter.
The particle grading instrument body of Nano grade traditional in the world is long-pending all huger, it is divided into several standalone modules, and price is all costly, micro-to electromigration scanning and Faraday cup current detecting is combined by the research staff such as Grimm company of Germany, devise the combination metering system of scanning electromobility particle diameter spectrometer (SMPS)+Faraday cup electrometer (FCE), structure is complicated, bulky, is not suitable for the detection of mobile pollution source; Technical Sourcing Internation of the U.S. devises fast electric mobility particle diameter spectrometer (FMPS), adopt unipolarity corona discharge diffusional charging mode, by using many electrical field gradings and the mode of many electrometers parallel measurement, the single needle point formula corona discharge wherein adopted, ionization district narrow range, the free ion quantity of generation is few, have impact on the charged efficiency of superfine particulate matter, and charge device and DMA grading plant adopt split design, it is difficult to one shielding, reduce the sensitivity of detection. These technology existing generally all adopt the frame for movement of macroscopic view, and the process and assemble of part is proposed high requirement, are generally all difficult to miniaturization and monitoring in real time simultaneously.
Utility model content
The purpose of this utility model is in that to provide one to integrate formula miniature plate Fine Particles spectrometry device, make up the deficiency of existing fine particle spectrometry technology, especially solve existing measurement device volume huge, not portable and can not the problem such as measurement in real time.
The technical solution of the utility model is:
One integrates formula miniature plate Fine Particles spectrometry device, including the charged module of unipolarity flat board, particulate cascade and inverting module and micro-current detecting and signal processing module;
The described charged module of unipolarity flat board include being parallel to each other and just to the first top panel arranged and the first lower panel, the some collets embedding in the first top panel, be arranged on the charged bottom electrode of the first lower panel inner surface, penetrate the unipolar high voltage source that the needle point of collets is connected with needle point and the sheath gas air inlet being arranged on the first top panel and the first lower panel front end;
Described particulate cascade and inverting module include being parallel to each other and just to the second top panel arranged and the second lower panel, adjust the second top panel and the intermediate washer of the second lower panel spacing, it is arranged on the second top panel and the sound spout of the second lower panel front end, it is opened on the second top panel and the second lower panel respectively and the symmetrical sample gas air inlet of next-door neighbour's sound notch setting, it is arranged between the second top panel and the second lower panel and is positioned at the laminar flow sheet on rear side of symmetrical sample gas air inlet, it is arranged on the second top panel inner surface and is positioned at the upper separation electrode on rear side of laminar flow sheet, it is arranged on the second lower panel inner surface and just lower separation electrode to upper separation electrode, it is opened on lower separation electrode the classification sample gas gas outlet of corresponding position on position and the second lower panel rearward, integrate at the second lower panel outer surface and the Faraday cup being positioned at classification sample gas gas outlet place, it is arranged on the first sensitive electrode within Faraday cup and is arranged on Faraday cup inner surface and the second sensitive electrode with the first sensitive electrode electrical connection,
Described micro-current detecting and signal processing module include controller, scanning voltage circuit, vacuum pump and drive circuit thereof and micro-current sensing means; The input of described controller connects the outfan of micro-current sensing means, the outfan of described controller connects the input of scanning voltage circuit and vacuum pump and drive circuit thereof, the input of described micro-current sensing means connects the second sensitive electrode, and the outfan of described scanning voltage circuit connects upper separation electrode and lower separation electrode;
The front end of described second top panel has integrated the first swash plate, and the front end of described second lower panel has integrated the second swash plate; Described first swash plate integrates in the rear end of the first top panel, and described second swash plate integrates in the rear end of the first lower panel; Described second top panel and the second lower panel be smaller than the first top panel and the spacing of the first lower panel.
The described formula that integrates miniature plate Fine Particles spectrometry device, described first top panel, the first lower panel, the second top panel, the second lower panel, the first swash plate and the second swash plate all adopt aluminium oxide ceramics to prepare.
The described formula that integrates miniature plate Fine Particles spectrometry device, the outer surface of described first top panel and the first lower panel is all painted with the first bucking electrode, the outer surface of described second top panel, the second lower panel, the first swash plate and the second swash plate is all painted with secondary shielding electrode, and described first bucking electrode and secondary shielding electrode all adopt thick membrane electrode.
The described formula that integrates miniature plate Fine Particles spectrometry device, described charged bottom electrode, upper separation electrode, lower separation electrode and the second sensitive electrode all adopt thick membrane electrode.
The described formula that integrates miniature plate Fine Particles spectrometry device, described needle point is array structure, described needle point is prepared by tungsten, copper or rustless steel, and needle point radius of curvature is 10��500um, and the spacing of described second top panel and the second lower panel is 0.5��10mm;
Described upper separation electrode with under separate between electrode constitute scanning electric field region, the length of described scanning electric field region is 10��100mm, and width is 10��50mm;
Described first sensitive electrode adopts expanded metal to prepare, and described expanded metal adopts foam metal material to prepare, and the resistivity of wherein said foam metal material is lower than 2.5 �� 10-8�� m, including silver, red copper, gold, the void density of described foam metal material is between 20��120.
The described formula that integrates miniature plate Fine Particles spectrometry device, described charged bottom electrode ground connection.
The described formula that integrates miniature plate Fine Particles spectrometry device, constitutes between described upper separation electrode and the second sensitive electrode and suppresses electric field, it is suppressed that the charged fine particle deflected in Faraday cup spreads to scanning electric field region.
The described formula that integrates miniature plate Fine Particles spectrometry device, described micro-current detecting and signal processing module also include display and memorizer, and the input of described display and memorizer connects the outfan of controller.
The beneficial effects of the utility model are:
(1) this utility model is theoretical based on particle electromigration, can detect that the particle of Nano grade, compared to traditional detection mode, does not have Monitoring lower-cut in theory, simultaneously without working solution and temperature control system and have shorter response time;
(2) particulate cascade of the present utility model adopts with inverting module and integrates formula slab construction, split type Faraday cup is added compared to traditional concentric column DMA hierarchy, this utility model simple in construction, process and assemble required precision is low, internal classification electric fields uniform, shield effectiveness is good simultaneously, it is possible to increase substantially the detection sensitivity of superfine particulate matter;
(3) this utility model uses pinpoint array in the charged module of unipolarity flat board, and ionization district scope is big, and the free ion quantity of generation is many, improves the charged efficiency of superfine particulate matter;
(4) rear end is used for that the Faraday cup structure of micro-charge-trapping is also integrated is produced on classification sample gas gas outlet by this utility model, collision distance between charged superfine particulate matter and the second sensitive electrode after being not only greatly shortened classification, natural utilization also separates the suppressor structure formed between electrode and the second sensitive electrode simultaneously, the diffusion of charged superfine particulate matter and static dissipative after can effectively preventing classification, increase substantially the detection sensitivity of Faraday cup, and in Faraday cup, increase by the first sensitive electrode, advantageously in the charge detection of charged particle;
(5) micro-current detecting of the present utility model adopts digitizing technique with signal processing module, convenient reading is quick, and controller feeds back the working value size that can better control over vacuum pump and drive circuit thereof and scanning voltage circuit by the signal of micro-current sensing means simultaneously;
(6) this utility model volume is little, and integrated level is high, and integrated design is easy to carry with, it may be achieved the multinode networking monitoring of portable Pollution Source Monitoring and big region width scope.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present utility model;
Fig. 2 is needle point of the present utility model distribution side view;
Fig. 3 is needle point of the present utility model distribution top view;
Fig. 4 is intermediate washer schematic diagram of the present utility model;
Fig. 5 is scanning electric part schematic diagram of the present utility model.
Detailed description of the invention
This utility model is further illustrated below in conjunction with the drawings and specific embodiments.
As it is shown in figure 1, one integrates formula miniature plate Fine Particles spectrometry device, including the charged module of unipolarity flat board 1, particulate cascade and inverting module 2, micro-current detecting and signal processing module 3.
Charged for clean sheath gas of the charged module of unipolarity flat board 1, adopt flat structure, including first top panel the 11, first lower panel 12, collets 13, charged bottom electrode 14, needle point 15, unipolar high voltage source 16, sheath gas air inlet 17 and the first bucking electrode 18.
Particulate cascade and inverting module 2 are for the particle classification in sample gas, adopt flat structure, including first swash plate the 201, second swash plate the 202, second top panel the 21, second lower panel 22, intermediate washer 23, sound spout 24, symmetrical sample gas air inlet 25, laminar flow sheet 26, upper separation electrode 27, lower separation electrode 28, classification sample gas gas outlet 29, Faraday cup the 210, first sensitive electrode the 211, second sensitive electrode 212, secondary shielding electrode 213, Faraday cup gas outlet 214 and gas outlet 215.
Micro-current detecting and signal processing module 3 are signal control and part of data acquisition, including controller 31, scanning voltage circuit 32, vacuum pump and drive circuit 33, micro-current sensing means 34, display 35 and memorizer 36.
First top panel 11 and the first lower panel 12 are parallel to each other just to setting; Collets 13 embed in the first top panel 11; Charged bottom electrode 14 is arranged on inner surface the ground connection of the first lower panel 12; One end of needle point 15 penetrates collets 13 and enters the region between the first top panel 11 and the first lower panel 12, and the other end connects unipolar high voltage source 16; Sheath gas air inlet 17 is arranged on the front end of the first top panel 11 and the first lower panel 12; First bucking electrode 18 is arranged on the outer surface of the first top panel 11 and the first lower panel 12.
Second top panel 21 is parallel to each other just to arranging and being connected by intermediate washer 23 with the second lower panel 22; Sound spout 24 is arranged on the front end of the second top panel 21 and the second lower panel 22, symmetrical sample gas air inlet 25 is opened in just position and next-door neighbour's sound spout 24 being arranged on the second top panel 21 and the second lower panel 22 respectively, and laminar flow sheet 26 is arranged on the region between the second top panel 21 and the second lower panel 22 and is positioned at the rear side of symmetrical sample gas air inlet 25; Upper separation electrode 27 is arranged on the inner surface of the second top panel 21, and lower separation electrode 28 is arranged on the inner surface of the second lower panel 22; Upper separation electrode 27 separates electrode 28 just to the rear side arranging and being positioned at laminar flow sheet 26 with lower; Classification sample gas gas outlet 29 is opened in the position rearward on lower separation electrode 28 and the corresponding position on the second lower panel 22.
Faraday cup 210 integrates at the outer surface of the second lower panel 22 and is positioned at classification sample gas gas outlet 29 place; First sensitive electrode 211 is arranged on the inside of Faraday cup 210, and is electrically connected with the second sensitive electrode 212; Second sensitive electrode 212 is arranged on the inner surface of Faraday cup 210; Faraday cup gas outlet 214 is opened in the bottom of Faraday cup 210; Secondary shielding electrode 213 is arranged on the outer surface of the second top panel 21 and the second lower panel 22; Gas outlet 215 is arranged on the rear end of the second top panel 21 and the second lower panel 22.
The front end of the rear end of the first top panel 11 and the first swash plate 201 integrates, and the front end of the rear end of the first swash plate 201 and the second top panel 21 integrates; The front end of the rear end of the first lower panel 12 and the second swash plate 202 integrates, and the front end of the rear end of the second swash plate 202 and the second lower panel 22 integrates; The spacing being smaller than the first top panel 11 and the first lower panel 12 of the second top panel 21 and the second lower panel 22.
Input and second sensitive electrode 212 of micro-current sensing means 34 connect, and for detecting the micro-electric current on the second sensitive electrode 212, the outfan of micro-current sensing means 34 is connected with the input of controller 31; The input of scanning voltage circuit 32 is connected with the outfan of controller 31, and the outfan of scanning voltage circuit 32 connects upper separation electrode 27 and lower separation electrode 28, for controlling upper separation electrode 27 and the lower voltage separated between electrode 28; The input of vacuum pump and drive circuit 33 thereof connects the outfan of controller 31, vacuum pump and drive circuit 33 thereof for controlling sheath gas air inlet 18 and the gas flow rate of symmetrical sample gas air inlet 25; The input of display 35 and memorizer 36 connects the outfan of controller 31.
As shown in Figure 2 and Figure 3, needle point 15 is in array structure, and needle point 15 is generally made up of tungsten, copper or steel, and many use tungsten pins, its radius of curvature is 10��500um. As shown in Figure 4, intermediate washer 23 is for adjusting the spacing of the second top panel 21 and the second lower panel 22, and the spacing of the second top panel 21 and the second lower panel 22 is 0.5��10mm. Laminar flow sheet 26 enters upper separation electrode 27 and the lower scanning electric field region separating and being constituted between electrode 28 for controlling sample gas and sheath gas with laminar condition. The length of scanning electric field region is 10��100mm, and width is 10��50mm.
First top panel 11 and the first lower panel 12 adopt highly purified aluminium oxide ceramics to make. Charged bottom electrode the 14, first bucking electrode 18, upper separation electrode 27, lower separation electrode the 28, second sensitive electrode 212, secondary shielding electrode 213 all adopt thick-film technique brushing to make, sinter on an insulating substrate by metallic conductor, its thickness is generally at about 20 ��m, electrode slurry selects palladium-silver (Pd-Ag) slurry, has the advantages such as adhesive strength height, solderability are good. First sensitive electrode 211 adopts expanded metal to prepare, expanded metal is made up of porous foam metal material, void density is between 20��120, and wherein porous foam metal material is generally adopted silver, red copper, gold or other resistivity less (resistivity should lower than 2.5 �� 10-8The metal of �� m), its thickness is general relevant to its void density, it is desirable to ensure that it has ventilation character. First bucking electrode 18 and secondary shielding electrode 213 are for shielding the interference signal in external environment. Constitute between upper separation electrode 27 and the second sensitive electrode 212 and suppress electric field, it is suppressed that enter the charged fine particle in Faraday cup 210 to scanning electric field region diffusion, form a suppressor structure.
Gas circuit of the present utility model is divided into two-way: first controller 31 controls the sheath gas entrance charged module 1 of unipolarity flat board by vacuum pump and drive circuit 33 thereof, also controls sample gas simultaneously and enters particulate cascade and inverting module 2 by symmetrical sample gas air inlet 25. Needle point 15 is powered by unipolar high voltage source 16, produces corona discharge. The charged ion produced through needle point 15 corona discharge mixes with the sheath gas entering the charged module 1 of unipolarity flat board, comprises a certain amount of charged ion after mixing in sheath entraining air stream. Sheath gas containing charged ion flows into particulate cascade and mixes with sample gas with inverting module 2, and after mixing, the fine particle in sample gas air-flow and the charged ion generation electric charge in sheath entraining air stream shift, and makes the particulate subband in sample gas air-flow power on lotus. The upper separation electrode 27 and the lower separation electrode 28 that wherein constitute scanning electric field have certain distance with symmetrical sample gas air inlet 25, to ensure that mixed air-flow enters scanning electric field region with laminar condition.
Original charged fine particle has certain horizontal flow velocity with air-flow in the horizontal direction, after scanning electric field region generation electromigration, the charged fine particle of only certain particle diameter is deflected in Faraday cup 210, deflect to the charged fine particle in Faraday cup 210 and the first sensitive electrode 211 collides, producing electric charge transfer in collision process, the electric charge that final charged fine particle is with is transferred on the second sensitive electrode 212 by the first sensitive electrode 211.
Electric charge on second sensitive electrode 212 is detected by micro-current sensing means 34, can obtain deflecting to the carried charge of the charged fine particle in Faraday cup 210, and then it is finally inversed by the number of the charged fine particle deflected in Faraday cup 210, namely the charged fine particle number of corresponding particle diameter under respective scanned voltage is learnt, just the fine particle concentration under this particle diameter can be obtained, by changing scanning voltage, it is possible to collect the fine particle concentration under different-grain diameter, fine particle spectrum can be drawn out.
As it is shown in figure 5, fine particle motion in scanning electric field, upper separation electrode 27, lower separation electrode 28 are respectively plus voltage. Fine particle horizontal motion distance is L, and direction of an electric field move distance is H, according to formula:
Wherein, VL, Q respectively air-flow flow into particulate cascade and the flow velocity of inverting module 2, flow, QaThe flow of particulate cascade and inverting module 2, Q is entered for sample gasshFor sheath throughput, H is the spacing of the second top panel 21 and the second lower panel 22, and L is the fine particle effective length in scanning electric field motion, and W is the width of scanning electric field, and U is scanning voltage, neFor the carried charge of fine particle, �� is gas viscosity, ZpFor electromobility, C*For Cunningham's skink index, DPParticle diameter for fine particle.
It can be seen that after fixing these geometric parameters of W, H, L, given stable gas flow rate VLAfter, by changing scanning voltage U, it is possible to collect the fine particle of different-grain diameter, just can realize online fine particle grain size grading.
Measurement apparatus of the present utility model has the features such as volume is little, precision is high, simple in construction, measuring speed are fast, provides technical guarantee for the monitoring in real time of particulate matter in detection environment.
The above embodiment is only that preferred implementation of the present utility model is described; not scope of the present utility model is defined; under the premise designing spirit without departing from this utility model; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present utility model are determined.
Claims (8)
1. one kind integrates formula miniature plate Fine Particles spectrometry device, it is characterised in that: include the charged module of unipolarity flat board (1), particulate cascade and inverting module (2) and micro-current detecting and signal processing module (3);
The charged module of described unipolarity flat board (1) includes being parallel to each other and just to the first top panel (11) arranged and the first lower panel (12), embed the some collets (13) in the first top panel (11), it is arranged on the charged bottom electrode (14) of the first lower panel (12) inner surface, penetrate the needle point (15) of collets (13), the unipolar high voltage source (16) being connected with needle point (15) and sheath gas air inlet (17) being arranged on the first top panel (11) and the first lower panel (12) front end,
Described particulate cascade and inverting module (2) include being parallel to each other and just to the second top panel (21) arranged and the second lower panel (22), adjust the intermediate washer (23) of the second top panel (21) and the second lower panel (22) spacing, it is arranged on the sound spout (24) of the second top panel (21) and the second lower panel (22) front end, it is opened in the symmetrical sample gas air inlet (25) that the second top panel (21) and the second lower panel (22) be upper and next-door neighbour's sound spout (24) is arranged respectively, it is arranged between the second top panel (21) and the second lower panel (22) and is positioned at the laminar flow sheet (26) of symmetrical sample gas air inlet (25) rear side, it is arranged on the second top panel (21) inner surface and is positioned at the upper separation electrode (27) of laminar flow sheet (26) rear side, it is arranged on the second lower panel (22) inner surface and just lower separation electrode (28) to upper separation electrode (27), being opened on lower separation electrode (28), position and the second lower panel (22) go up the classification sample gas gas outlet (29) of corresponding position rearward, integrate at the second lower panel (22) outer surface and the Faraday cup (210) being positioned at classification sample gas gas outlet (29) place, it is arranged on internal the first sensitive electrode (211) of Faraday cup (210) and is arranged on Faraday cup (210) inner surface and the second sensitive electrode (212) being electrically connected with the first sensitive electrode (211),
Described micro-current detecting and signal processing module (3) include controller (31), scanning voltage circuit (32), vacuum pump and drive circuit (33) thereof and micro-current sensing means (34); The input of described controller (31) connects the outfan of micro-current sensing means (34), the outfan of described controller (31) connects the input of scanning voltage circuit (32) and vacuum pump and drive circuit (33) thereof, the input of described micro-current sensing means (34) connects the second sensitive electrode (212), and the outfan connection of described scanning voltage circuit (32) separates electrode (27) and lower separation electrode (28);
The front end of described second top panel (21) has integrated the first swash plate (201), and the front end of described second lower panel (22) has integrated the second swash plate (202); Described first swash plate (201) integrates in the rear end of the first top panel (11), and described second swash plate (202) integrates the rear end in the first lower panel (12); The spacing being smaller than the first top panel (11) and the first lower panel (12) of described second top panel (21) and the second lower panel (22).
2. according to claim 1 integrate formula miniature plate Fine Particles spectrometry device, it is characterised in that: described first top panel (11), the first lower panel (12), the second top panel (21), the second lower panel (22), the first swash plate (201) and the second swash plate (202) all adopt aluminium oxide ceramics to prepare.
3. according to claim 1 integrate formula miniature plate Fine Particles spectrometry device, it is characterized in that: the outer surface of described first top panel (11) and the first lower panel (12) is all painted with the first bucking electrode (18), the outer surface of described second top panel (21), the second lower panel (22), the first swash plate (201) and the second swash plate (202) is all painted with secondary shielding electrode (213), and described first bucking electrode (18) and secondary shielding electrode (213) all adopt thick membrane electrode.
4. according to claim 1 integrate formula miniature plate Fine Particles spectrometry device, it is characterised in that: described charged bottom electrode (14), upper separation electrode (27), lower separation electrode (28) and the second sensitive electrode (212) all adopt thick membrane electrode.
5. according to claim 1 integrate formula miniature plate Fine Particles spectrometry device, it is characterized in that: described needle point (15) is in array structure, described needle point (15) is prepared by tungsten, copper or rustless steel, needle point radius of curvature is 10��500um, and the spacing of described second top panel (21) and the second lower panel (22) is 0.5��10mm;
Described upper separation electrode (27) with under separate between electrode (28) constitute scanning electric field region, the length of described scanning electric field region is 10��100mm, and width is 10��50mm;
Described first sensitive electrode (211) adopts expanded metal to prepare, and described expanded metal adopts foam metal material to prepare, and the resistivity of wherein said foam metal material is lower than 2.5 �� 10-8�� m, including silver, red copper, gold, the void density of described foam metal material is between 20��120.
6. according to claim 1 integrate formula miniature plate Fine Particles spectrometry device, it is characterised in that: described charged bottom electrode (14) ground connection.
7. according to claim 1 integrate formula miniature plate Fine Particles spectrometry device, it is characterized in that: constitute between described upper separation electrode (27) and the second sensitive electrode (212) and suppress electric field, it is suppressed that the charged fine particle deflected in Faraday cup (210) spreads to scanning electric field region.
8. according to claim 1 integrate formula miniature plate Fine Particles spectrometry device, it is characterized in that: described micro-current detecting and signal processing module (3) also include display (35) and memorizer (36), the input of described display (35) and memorizer (36) connects the outfan of controller (31).
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| CN201521075332.2U CN205280540U (en) | 2015-12-19 | 2015-12-19 | Miniature dull and stereotyped atmosphere fine particle of integrative integrated form register for easy reference measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918358A (en) * | 2018-07-17 | 2018-11-30 | 中煤科工集团重庆研究院有限公司 | Particulate matter particle size distribution detection system and method based on DMA |
| WO2021114785A1 (en) * | 2019-12-13 | 2021-06-17 | 中国科学院合肥物质科学研究院 | Differential high-concentration particulate matter measurement system and method based on dynamic faraday cup |
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2015
- 2015-12-19 CN CN201521075332.2U patent/CN205280540U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918358A (en) * | 2018-07-17 | 2018-11-30 | 中煤科工集团重庆研究院有限公司 | Particulate matter particle size distribution detection system and method based on DMA |
| WO2021114785A1 (en) * | 2019-12-13 | 2021-06-17 | 中国科学院合肥物质科学研究院 | Differential high-concentration particulate matter measurement system and method based on dynamic faraday cup |
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