CN103674793A - Apparatus and method for particle sampling and measurement in the ambient air - Google Patents
Apparatus and method for particle sampling and measurement in the ambient air Download PDFInfo
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- CN103674793A CN103674793A CN201310432492.7A CN201310432492A CN103674793A CN 103674793 A CN103674793 A CN 103674793A CN 201310432492 A CN201310432492 A CN 201310432492A CN 103674793 A CN103674793 A CN 103674793A
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- 239000002245 particle Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 title claims description 5
- 238000005070 sampling Methods 0.000 title abstract description 25
- 239000012080 ambient air Substances 0.000 title abstract description 4
- 239000013078 crystal Substances 0.000 claims abstract description 26
- 239000010453 quartz Substances 0.000 claims abstract description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011362 coarse particle Substances 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000004044 response Effects 0.000 claims abstract description 6
- 230000008021 deposition Effects 0.000 claims description 18
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 4
- 239000013618 particulate matter Substances 0.000 abstract 1
- 239000003570 air Substances 0.000 description 22
- 238000000151 deposition Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
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- 238000012544 monitoring process Methods 0.000 description 3
- 238000003380 quartz crystal microbalance Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 2
- 231100001243 air pollutant Toxicity 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004442 gravimetric analysis Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012372 quality testing Methods 0.000 description 2
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- 229910052786 argon Inorganic materials 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0272—Investigating particle size or size distribution with screening; with classification by filtering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
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- Chemical & Material Sciences (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)
- Dispersion Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
环境空气中的颗粒的采样和测量设备和方法。用于采样和测量大气中的颗粒物的设备和方法包括用于含有气体的颗粒进入的入口。机构然后用于除去大于选定尺寸的粗颗粒，同时允许小于选定尺寸的被过滤的颗粒穿过。包括石英晶体传感器的腔室允许已经穿过的被过滤的颗粒沉积，以响应于沉积的颗粒物产生输出信号。
Device and method for sampling and measuring particles in ambient air. Apparatus and methods for sampling and measuring particulate matter in the atmosphere include an inlet for entry of gas-containing particles. The mechanism is then used to remove coarse particles larger than the selected size while allowing filtered particles smaller than the selected size to pass through. A chamber including a quartz crystal sensor allows filtered particles that have passed through to settle to generate an output signal in response to the deposited particles.
Description
The cross reference of related application
The rights and interests of the application based on following patented claim and the following patented claim of requirement: the U.S. non-provisional application sequence No.14/031 that on September 19th, 2013 submits to, the U.S. Provisional Application sequence No.61/704 that on September 21st, 661 and 2012 submits to, 148, the full content of above patented claim is incorporated to herein by reference.
Technical field
For the instrument of sampling and measure airborne particle, can be used for various objects.This instrument can be used to scientific research, to study the character of particle air pollutants and transporting and disperseing in ambient atmosphere thereof.This instrument also can be used for studying the impact of particle air pollutants on human health.In addition, for rules, defer to object, this instrument can also be used to sampling and measure the particle in atmosphere, to determine that ambient level is whether in the maximum safe limit of legal provisions.
Summary of the invention
The invention describes for sampling and the method and apparatus of the air particle of measurement environment atmosphere.Using easiness and the most important part of measuring accuracy, the method and equipment are particularly useful for deferring to measurement object.
Equipment of the present invention comprises the entrance that the particle for containing gas enters.Then mechanism for removing the coarse particle that is greater than selected size, allows the particle that is less than selected size to pass simultaneously.The chamber that comprises quartz crystal sensor allows the particle deposition having passed, and with the particle in response to deposition, produces output signal.
The present invention also comprises a kind of for using the method for concentration of the particle of device measuring gas, and the particle that wherein contains gas enters chamber.This chamber comprises quartz crystal sensor, and particle deposits on quartz crystal sensor, with the particle in response to deposition, produces output signal.This chamber is maintained to be enough to prevent at the temperature of steam condensation on sensor.The method comprises: remove the coarse particle that equivalent aerodynamic diameter is greater than approximately 10 μ m, the particle that allows equivalent aerodynamic diameter to be less than approximately 10 μ m passes.Make particle that equivalent aerodynamic diameter is less than approximately 10 μ m with the ion producing in corona discharge.The particle deposition passing, on quartz crystal sensor, and is measured to the output signal of quartz crystal sensor.
Accompanying drawing explanation
Fig. 1 be in a preferred embodiment for sampling and the schematic diagram of the system of the air particles of measurement environment atmosphere.
Fig. 2 is for being greater than the schematic diagram of entrance particle separator of the particle of 10 μ m for removing diameter.
Fig. 3 is for for collecting the schematic diagram for the filtrator sampling thief of the particle of gravimetric analysis or chemico-analytic atmosphere.
Fig. 4 be in a preferred embodiment for by the particle deposition of atmosphere to the sampling thief on quality detection sensor.
Fig. 5 A and 5B are the schematic diagram for detection of the quartz crystal microbalance of the particle of the deposition on quartz crystal.
Embodiment
Fig. 1 shows according to of the present invention for sampling and measuring the system of the particle of atmosphere.In the system shown in 100 places, there is the sampling entrance 110 entering for carrying the surrounding air of suspended particle generally.Entrance 110 is provided with particle separator, and particle separator, for removing the coarse particle that is greater than about 10 μ m, only allows flow through and arrive the components downstream for sample collection and analysis compared with granule (being less than the particle of about 10 μ m) thus.
Along path, a part for 120 mobile air enters sampling chamber 130, and sampling chamber 130 comprises filtrator 134, for the particle that gathers atmosphere on filtrator, for analyzing, along the speed of the air stream in this path, by little electric pump 140, keeps.The flow velocity of air is measured by flow sensor and electronic controller 150.At electronic controller 150(, it has FEEDBACK CONTROL) help under, flow velocity can be maintained at specific setting value.Typically, flow velocity is less than approximately 30 liters/min.Can use higher flow velocity.Yet, in a small amount material can use equipment described herein and method by Accurate Analysis for quality and/or chemical composition analysis.Using high sampling flow velocity to gather lot of materials is unnecessary for analyzing.Small-sized and compact instrument described herein is easy to assembling and uses in laboratory or wilderness, provides simultaneously and measures needed degree of accuracy.By contrast, the operated in flow rate with about 40 cubic feet/min (1120 liters/min) for the conventional air sampling thief of environmental monitoring.The flow velocity of 30 liters/min described herein is only for about 2.5% of traditional flow velocity of this object.
Along path, another part of 160 mobile air-flows enters chamber 170, and chamber 170 comprises granular mass detecting sensor 174, to monitor the quality of the lip-deep particle of detection that is deposited on sensor 174.Air-flow along this path also keeps by little pump 180, and flow velocity is measured by flow sensor and controller 190, air velocity is remained on to specific setting value.
The third part of air 200 flows and enters another coarse separator 210 along path, to remove the coarse particle that is greater than about 2.5 μ m or about 1.0 μ m.After coarse separator, air is divided into two path downstreams 220 and 230.Air path 220 is led to chamber 240, and chamber 240 comprises filtrator sampling thief, and the particulate samples that filtrator sampling thief gathers in atmosphere is used for analyzing.Another air path 230 is led to chamber 250, chamber 250 comprises sensor 254, sensor 254 is for monitoring the quality of the lip-deep particle of detection that is deposited on sensor, is less than the mass concentration of particle of the atmosphere of about 2.5 μ m or about 1.0 μ m for monitoring diameter.
The downstream of each in chamber 240 and 250 is little electric pump 260 and 270 and flow sensor and controller 280 and 290, for the speed of the air stream through chamber 240 and 250 is controlled as their setting values separately.Therefore, the schematic diagram that is arranged in generally the system at 100 places can be collected the particulate samples of atmosphere of PM10 and PM2.5 or PM1.0 range of size for quality and/or chemical analysis, and is provided for the mass concentration value in atmosphere that PM10 and PM2.5 or PM10 and PM1.0 measure.Term PM 10, PM2.5 and PM1.0 particle are defined as equivalent aerodynamic diameter and are greater than the Atmospheric particulates that the particle of 10 μ m, 2.5 μ m or 1.0 μ m has been removed.About for sampling and measuring in the situation of the present invention of method and apparatus of Atmospheric particulates, this term refers to that equivalent aerodynamic diameter is greater than the sample stream that the particle of 10 μ m, 2.5 μ m or 1.0 μ m has been removed.
Fig. 2 be sampling entrance 110 in Fig. 1 in Fig. 2 generally with the schematic diagram of 300 expressions, for sampling from the air of ambient atmosphere.The air being represented by arrow 312 is sampled the entrance covering under 310.What be positioned at this sampling entrance downstream is generally with the inertial impaction device (particle separator) shown in 320.Ram is provided with inlet nozzle 330, with the air stream that arrow 332 is represented, accelerates at a high speed.Bulky grain, due to its large scale and momentum, is knocked on impact surface 340 and from mobile air stream 332 and removes.Ram is designed to remove the particle that equivalent aerodynamic diameter is greater than about 10 μ m.The particle that equivalence aerodynamic diameter is less than about 10 μ m is carried through flowtube 350 and 360 and enters the downstream flow passage 370 that arrow 372 represents by air stream, then through outlet 380, leaves ram.
The equivalent aerodynamic diameter of particle is the diameter with the unit intensity ball of the settling velocity same with the Particle Phase of paying close attention to.When Inertia of design particle sorting apparatus, the concept of equivalent aerodynamic diameter is separated with the size of inertial impaction is known for a person skilled in the art, therefore will further not discuss.
Fig. 3 is for for collecting the schematic diagram for the filtrator sampling thief of the particle of gravimetric analysis and/or chemico-analytic atmosphere.Filter plant illustrates with 400 generally.Filtrator sampling thief 400 is positioned at chamber 130 and 240 and shown in Figure 1.The air that arrow 405 represents is sampled through the entrance 410 of housing 420.Carrying the air that diameter is less than the suspended particle of 10 μ m then flows through being positioned at inner filtrator 430.Filtrator 430 is clamped between two sheet metals 440 and 450 tightly, with prevent edge around flow dew.Filtrator is supported on downstream by the porous metals support member 460 of rigidity.Alternatively, the expanded metal of rigidity can be used as filter support use.Filtrator is as general as circular, has circular shape, but also can use other filter shape, for example rectangle or square.
Filtrator sample devices in Fig. 3 is maintained at the temperature that approaches ambient air temperature generally, to guarantee that the size of the particle (it may contain a certain amount of water) in atmosphere is not subject to very large impact.Sometimes, sampling thief can operate at than the temperature of high several degrees Celsius of ambient air temperature, to prevent that a large amount of water is present in the particle being gathered.
Fig. 4 show for make the particle of atmosphere charged and by this particle deposition on quartz crystal microbalance for detection of the particle of deposition.In outfit of equipment, at 500 places, illustrate, and equipment 500 is arranged in chamber 170 and 250 and be provided with two chambers.Upper chamber 510 is for making particle charged, and lower chambers 520 sends sensor as solids precipitation device charged particle deposition is arrived to quality, for granular mass concentration determination.
The wall 610 of lower chambers 520 for example, consists of insulating material (plastics or pottery).Metal electrode 590 is positioned on quartz crystal quality detection sensor 600.High voltage source 550 is connected to electrode 590, and quartz crystal sensor 600 ground connection.Thereby high voltage source 550 is also provided with control circuit (not shown) and obtains optimal performance to change voltage, provides simultaneously and can repeat Voltage-output to guarantee the stable operation of settling vessel.
In order to prevent the condensation on sensor 600 of airborne water vapor, the upper chamber in Fig. 4 and lower chambers are maintained at suitable high temperature to prevent the water vapor condensation in chamber.Typical temperature is 40 ℃.According to the application-specific of environmental baseline and equipment, can use higher or lower temperature.
Fig. 5 a and 5b are the schematic diagram for detection of the quartz crystal microbalance of the particle depositing on quartz crystal.Fig. 5 a illustrates the front side of sensor and Fig. 5 b illustrates the rear side of sensor.
On the rear side of quartz crystal sensor, also there is the electrode 640 of coated with gold, the diameter of electrode 640 is approximate identical with the diameter of surveyed area on front side.Uncoated quartz areas illustrates at 650 places.Sensor is set to by applying driving voltage to electrode at its resonant frequency vibration.For the traditional AT cutting quartz crystal sending for quality, vibration is at transverse mode, in the parallel direction in the surface with having deposited particle.With when crystal, be that clean resonant frequency is compared, the resonant frequency with the crystal of the particle depositing on plane of crystal can become less.This variation of frequency thereby becomes than direct ratio with the granular mass of deposition, this can be definite for granular mass.
The foregoing description of instrument is described about the particle sizing for atmosphere.The particle that identical equipment can also suspend for the gas medium of measuring outside deacration.The particle suspending in nitrogen, argon gas and other inert gas also can comprise the measured suspended particle of needs.Method and apparatus described herein is also applicable to such application.
Although invention has been described with reference to preferred embodiment, those skilled in the art should recognize under prerequisite without departing from the spirit and scope of the present invention can carry out the modification of form and details.
Claims (19)
1. for an equipment for the particle of measurement gas, described equipment comprises:
The entrance entering for described gas;
Mechanism, described mechanism, for removing the coarse particle that is greater than selected size, allows to be less than passing compared with granule of described selected size; With
The first chamber, described the first chamber comprises quartz crystal sensor, described in be less than described selected size particle can on described quartz crystal sensor, deposit, with the particle in response to deposition, produce output signal.
2. equipment according to claim 1, described chamber is maintained to be enough to prevent at the temperature of steam condensation on described sensor.
3. equipment according to claim 2, described temperature is in the approximate extents of 25 ℃ to 55 ℃.
4. equipment according to claim 1, described equipment comprises for the gas flow rate through described chamber being remained to the mechanism of particular set value.
5. equipment according to claim 1, described equipment comprises gas filter, described gas filter is for collecting the particulate samples for analyzing.
6. equipment according to claim 1, described gas filter comprises for the gas flow rate through described filtrator being remained to the mechanism of particular set value.
7. equipment according to claim 1, the described coarse grained equivalent aerodynamic diameter being removed is greater than approximately 10 μ m.
8. equipment according to claim 1, comprises another coarse particle gatherer, and described another coarse particle gatherer is for removing the particle that equivalent aerodynamic diameter is greater than about 2.5 μ m or about 1.0 μ m.
9. equipment according to claim 1, comprise with claim 1 in similar the second chamber of described the first chamber, described the second chamber for make ion that particle produces with corona discharge and by charged particle deposition at quartz crystal sensor, with the particle in response to described deposition, produce output signal.
10. equipment according to claim 6, wherein saidly comprises speed-variable pump, flow sensor and electronic controller for described gas flow rate being remained to the mechanism of particular set value.
11. equipment according to claim 10, wherein the described gas flow rate through described filtrator is less than about 100 liters/min.
12. equipment according to claim 10, the temperature of the described chamber that wherein said gas flow passes is not higher than about 10 ℃ of the temperature that enters the described gas of described entrance.
13. 1 kinds for using the method for concentration of the particle of device measuring gas, described equipment has: the entrance entering for described gas and the chamber that comprises quartz crystal sensor, particle deposits on described quartz crystal sensor, with the particle in response to deposition, produce output signal, described chamber is maintained to be enough to prevent, at the temperature of steam condensation on described sensor, said method comprising the steps of:
Remove the coarse particle that equivalent aerodynamic diameter is greater than approximately 10 μ m, allow equivalent aerodynamic diameter to be less than passing compared with granule of approximately 10 μ m;
Make described compared with granule with the ion producing in corona discharge;
By described charged particle deposition on described quartz crystal sensor; With
Measure the described output signal of described quartz crystal sensor.
14. methods according to claim 13, comprise following other step:
Remove the coarse particle that equivalent aerodynamic diameter is greater than about 2.5 μ m or about 1.0 μ m;
In comprising another chamber of quartz crystal sensor, make equivalent aerodynamic diameter be less than the particle of 2.5 μ m or 1.0 μ m charged, to produce charged particle;
By described charged particle deposition on described quartz crystal sensor;
Measure the described output signal of described quartz crystal sensor, to determine that equivalent aerodynamic diameter is less than the particle of the deposition of about 2.5 μ m or about 1.0 μ m.
15. methods according to claim 13, described chamber is maintained to be enough to prevent at the temperature of steam condensation on described sensor.
16. methods according to claim 15, described temperature is in the approximate extents of 25 ℃ to 55 ℃.
17. methods according to claim 13, the described coarse grained equivalent aerodynamic diameter being removed is less than approximately 10 μ m.
18. methods according to claim 13, comprise for keeping the mechanism of stable gas flow rate, through the described stable gas flow rate of described filtrator, are less than about 100 liters/min.
19. methods according to claim 13, the temperature of described chamber is not higher than about 10 ℃ of the temperature that enters the described gas of described entrance.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261704148P | 2012-09-21 | 2012-09-21 | |
| US61/704,148 | 2012-09-21 | ||
| US14/031,661 | 2013-09-19 | ||
| US14/031,661 US9541488B2 (en) | 2012-09-21 | 2013-09-19 | Particle sampling and measurement in the ambient air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103674793A true CN103674793A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310432492.7A Pending CN103674793A (en) | 2012-09-21 | 2013-09-22 | Apparatus and method for particle sampling and measurement in the ambient air |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103674793A (en) |
| GB (1) | GB2506991A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181395A (en) * | 2015-09-10 | 2015-12-23 | 麦克传感器股份有限公司 | Multifunctional intelligent portable air sampler and detecting method thereof |
| CN106468648A (en) * | 2015-08-19 | 2017-03-01 | 财团法人工业技术研究院 | Micro-particle detector and method for manufacturing screening element |
| CN108918321A (en) * | 2018-07-16 | 2018-11-30 | 中国烟草总公司郑州烟草研究院 | A kind of quality characterization method for dividing particles for cigarette smoke |
| CN109490160A (en) * | 2017-09-12 | 2019-03-19 | 日立-Lg数据存储韩国公司 | Using the dust sensor of impactor |
| CN109916694A (en) * | 2019-04-10 | 2019-06-21 | 重庆交通大学 | An ultra-low wall loss submicron terminal virtual impactor |
| CN111551470A (en) * | 2019-10-02 | 2020-08-18 | 香港理工大学 | A semi-online device and method for measuring acidic particles in the atmosphere |
| CN111712701A (en) * | 2017-12-15 | 2020-09-25 | ams 国际有限公司 | Filter-based integrated particulate sensor |
| CN113728219A (en) * | 2018-08-30 | 2021-11-30 | 科学和技术中心 | Fine particle sensor with in-line microbalances |
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| JP6390169B2 (en) * | 2014-05-28 | 2018-09-19 | 富士通株式会社 | Measuring apparatus and measuring method |
| CN104865347A (en) * | 2015-04-24 | 2015-08-26 | 北京林业大学 | Portable experiment device for analysis of particle wet deposition ability of plant |
| WO2018089674A1 (en) * | 2016-11-09 | 2018-05-17 | The Board Of Trustees Of The University Of Illinois | Particulate matter sensor |
| US11460444B2 (en) * | 2019-04-23 | 2022-10-04 | Pall Corporation | Aircraft air contaminant analyzer and method of use |
| US10955318B2 (en) | 2019-04-23 | 2021-03-23 | Pall Corporation | Aircraft air contaminant analyzer and method of use |
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| GB2023831B (en) * | 1978-04-06 | 1982-09-22 | Graviner Ltd | Detection of particles in a gaseous medium |
| GB9523812D0 (en) * | 1995-11-21 | 1996-01-24 | Sun Electric Uk Ltd | Method and apparatus for analysis of particulate content of gases |
| AT411628B (en) * | 1999-12-14 | 2004-03-25 | Avl List Gmbh | ARRANGEMENT AND METHOD FOR THE QUANTITATIVE AND QUALITATIVE ANALYSIS OF PARTICLES IN GASES |
| AU2001297736A1 (en) * | 2000-11-13 | 2002-10-08 | University Of Southern California | High-quality continuous particulate matter monitor |
| AT409799B (en) * | 2001-04-18 | 2002-11-25 | Avl List Gmbh | METHOD FOR MEASURING AEROSOL PARTICLES IN GASEOUS SAMPLES |
| AUPR600701A0 (en) * | 2001-06-28 | 2001-07-26 | Commonwealth Scientific And Industrial Research Organisation | Method and apparatus for measuring a property of air |
| US7168292B2 (en) * | 2003-05-15 | 2007-01-30 | The Regents Of The University Of California | Apparatus for particulate matter analysis |
| US7251982B2 (en) * | 2003-11-13 | 2007-08-07 | Sensors, Inc. | Apparatus for analysis of aerosols |
| US7174767B2 (en) * | 2003-12-01 | 2007-02-13 | Sensors, Inc. | Particulate matter analyzer and method of analysis |
| DE102005056718A1 (en) * | 2005-11-29 | 2007-05-31 | Georg-August-Universität Göttingen Stiftung Öffentlichen Rechts | Impactor, especially for fine dust measurement |
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2013
- 2013-09-22 CN CN201310432492.7A patent/CN103674793A/en active Pending
- 2013-09-23 GB GB201316822A patent/GB2506991A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106468648A (en) * | 2015-08-19 | 2017-03-01 | 财团法人工业技术研究院 | Micro-particle detector and method for manufacturing screening element |
| US10458893B2 (en) | 2015-08-19 | 2019-10-29 | Industrial Technology Research Institute | Miniaturized particulate matter detector and manufacturing method of a filter |
| CN105181395A (en) * | 2015-09-10 | 2015-12-23 | 麦克传感器股份有限公司 | Multifunctional intelligent portable air sampler and detecting method thereof |
| CN109490160A (en) * | 2017-09-12 | 2019-03-19 | 日立-Lg数据存储韩国公司 | Using the dust sensor of impactor |
| CN111712701A (en) * | 2017-12-15 | 2020-09-25 | ams 国际有限公司 | Filter-based integrated particulate sensor |
| CN108918321A (en) * | 2018-07-16 | 2018-11-30 | 中国烟草总公司郑州烟草研究院 | A kind of quality characterization method for dividing particles for cigarette smoke |
| CN113728219A (en) * | 2018-08-30 | 2021-11-30 | 科学和技术中心 | Fine particle sensor with in-line microbalances |
| CN113728219B (en) * | 2018-08-30 | 2024-05-24 | 科学和技术中心 | Fine particle sensor with in-line microbalance |
| CN109916694A (en) * | 2019-04-10 | 2019-06-21 | 重庆交通大学 | An ultra-low wall loss submicron terminal virtual impactor |
| CN109916694B (en) * | 2019-04-10 | 2021-03-16 | 重庆交通大学 | Virtual impacter of submicron terminal is decreased to ultralow wall |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB201316822D0 (en) | 2013-11-06 |
| GB2506991A (en) | 2014-04-16 |
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