CN104865173A - Light scattering-based particulate matter concentration detection device - Google Patents
Light scattering-based particulate matter concentration detection device Download PDFInfo
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- CN104865173A CN104865173A CN201410061150.3A CN201410061150A CN104865173A CN 104865173 A CN104865173 A CN 104865173A CN 201410061150 A CN201410061150 A CN 201410061150A CN 104865173 A CN104865173 A CN 104865173A
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Abstract
The invention discloses a light scattering-based particulate matter concentration detection device. The light scattering-based particulate matter concentration detection device comprises a particulate matter sampling and cutting device, a scattered light intensity detector, a circuit board, and a display device; the particulate matter sampling and cutting device is connected with the scattered light intensity detector; cut diameter of the particulate matter sampling and cutting device is 2.5+/-0.2<mu>m, and collection efficiency geometric standard deviation is 1.2+/-0.1<mu>m; the circuit board is provided with a data processing module, and a mass concentration conversion coefficient externally arranged interface; the data processing module is connected with the scattered light intensity detector; the mass concentration conversion coefficient externally arranged interface is connected with the data processing module; and the display device is connected with the data processing module. The light scattering-based particulate matter concentration detection device is convenient for people to obtain PM2.5 concentration at a certain time timely, and is capable of providing convenience for air quality PM2.5 index real-time monitoring, and air pollution degree evaluation of certain areas, and providing favorable conditions for active treatment of PM2.5 pollution.
Description
Technical field
The invention belongs to particle concentration detection field, particularly relate to a kind of particle concentration checkout equipment based on light scattering.
Background technology
In recent months, Beijing, Deng Ge big city, Shanghai are subject to serious haze and pollute.PM2.5 and PM10 is the main composition part of haze weather, but is not exclusively equal to gray haze.Haze weather causes visibility to reduce, and very easily traffic hazard occurs.PM2.5 refers to and mixes by solids and liquid particles the fine particle that the particle diameter that forms is less than 2.5 μm, also be referred to as fine particle and maybe can enter lung particle, 1/20 of its diameter not enough mankind hair thickness, easily long-time suspension also can be floating at a distance in an atmosphere.
Ultra micro small-particle PM2.5 not only causes serious gray haze, and aggravation air pollution, also easily causes the phenomenons such as asthma, breathing problem, serious harm health, may contain carcinogenicity simultaneously.The international monitoring method of existing PM2.5 has two kinds: β rays method and binary channels oscillating balance method.The ultimate principle of these two kinds of methods is similar.But the instrument that these two kinds of methods are used is all very huge, is not suitable for civil small-scale.For common citizen, they are only the most direct victim of PM2.5, and the numerical value therefore understanding the PM2.5 of every day is necessary.If resident is aware of this data, just can properly protect before going out or when house, by such as reducing outdoor sport, put on the methods such as safety appliance such as mouth mask time out of doors and reducing the harm of PM2.5 to human body as far as possible.
In addition, PM2.5 has larger concentration difference for the feature of landform and region, and mensuration common at present cannot evade this problem, and individually the reference value of region measurement value is in fact not high.
Summary of the invention
Based on this, for above-mentioned technical matters, provide a kind of particle concentration checkout equipment based on light scattering.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of particle concentration checkout equipment based on light scattering, comprise particle sampling cutter, scattered light intensity detector, circuit board and display device, described particle sampling cutter is connected with described scattered light intensity detector, the incising control of this particle sampling cutter is 2.5 ± 0.2 μm, the geometric standard deviation of arresting efficiency is 1.2 ± 0.1 μm, described circuit board has data processing module and mass concentration conversion coefficient outer setting interface, described data processing module is connected with described scattered light intensity detector, described mass concentration conversion coefficient outer setting interface is connected with described data processing module, described display device is connected with described data processing module.
Described circuit board is also provided with communication special purpose interface, and described communication special purpose interface is connected with described data processing module.
Described circuit board is also provided with power module.
Described mass concentration conversion coefficient outer setting interface is the cable interface for connecting computer.
Apparatus of the present invention volume is little, noise is low, sampled air is substantially lossless, "dead" material (relative to β rays method), can apply in numerous environment, do not limit place, the real-time continuous monitoring of a certain regional PM2.5 value can be realized, not only facilitate the PM2.5 concentration value that the common people grasp a certain moment in time, also providing great facility by the assessment of the Real-Time Monitoring to air quality PM2.5 index, somewhere air pollution degree, providing advantage for actively administering PM2.5 pollution.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Fig. 1 is structural representation of the present invention;
Fig. 2 is experimental fit Line Chart one of the present invention;
Fig. 3 is experimental fit Line Chart two of the present invention.
Embodiment
As shown in Figure 1, a kind of particle concentration checkout equipment based on light scattering, comprises particle sampling cutter 110, scattered light intensity detector 120, circuit board 130 and display device 140.
The incising control of particle sampling cutter 110 is 2.5 ± 0.2 μm, and the geometric standard deviation of arresting efficiency is 1.2 ± 0.1 μm, for being separated with larger particles by the particle of the PM2.5 in sampling air.This particle sampling cutter 110 is connected with scattered light intensity detector 120, after having sampled, is carried out the detection of scattered light intensity by scattered light intensity detector 120.
Circuit board 130 have data processing module 131, mass concentration conversion coefficient outer setting interface 132, communication special purpose interface 133 and power module 134.
Data processing module 131 is connected with scattered light intensity detector 120, and mass concentration conversion coefficient outer setting interface 132, communication special purpose interface 133 and power module 134 are all connected with described data processing module.
Mass concentration conversion coefficient outer setting interface 132 is for from outer setting mass concentration conversion coefficient.
Particularly, mass concentration conversion coefficient outer setting interface 132 is the cable interface for connecting computer 2, arranges mass concentration conversion coefficient in advance by computer 2 to data processing module 131.
Display device 140 is connected with data processing module 131, for showing testing result.
Be understandable that, testing result also can show on computer 2.
Principle of the present invention:
The present invention adopts light scattering method to detect the mass concentration of particle.
Light scattering method irradiates the rear loose mass concentration measuring particle by the size of penetrating light signal sent by measuring particle light.The method utilizes each parameter of Mie scattering theory and particle to carry out inverting particle mass concentration.When light is by particulate matter, for the particle that the order of magnitude is equal or larger with using optical wavelength, light scattering is the principal mode of optical energy attenuation.Its principle is that the scatter light flux that particle mass concentration and photometer receive is linear.
According to Mie scattering theory, scattered light intensity and particle size, lambda1-wavelength are relevant.Namely, under the more stable clean environment of temperature and humidity, when illumination is penetrated on the particle suspended in atmosphere, scattered light is produced.Under the condition that particle character is certain, the scattered light intensity of particle is directly proportional to its mass concentration.By measuring scattered light intensity, application quality concentration conversion coefficient K value, can try to achieve particle mass concentration.
Above-mentioned mass concentration conversion coefficient K value can be arranged by computer 2 in advance.
During detection, first particle sampling cutter 110 pairs of air are sampled, and larger particles is separated, then the detection of scattered light intensity is carried out by scattered light intensity detector 120, obtaining the intensity of scattered light, is particle mass concentration according to the mass concentration conversion coefficient K preset by the intensity-conversion of scattered light by data processing module 131 afterwards.
Apparatus of the present invention volume is little, noise is low, sampled air is substantially lossless, "dead" material (relative to β rays method), can apply in numerous environment, do not limit place, the real-time continuous monitoring of a certain regional PM2.5 value can be realized, not only facilitate the PM2.5 concentration value that the common people grasp a certain moment in time, also providing great facility by the assessment of the Real-Time Monitoring to air quality PM2.5 index, somewhere air pollution degree, providing advantage for actively administering PM2.5 pollution.
Reliability of the present invention is verified below by way of testing.
Apparatus of the present invention, as experiment place, are placed in 7th floors draughty balconies, test respectively in 10:00-16:00 and 2013 on October 4th, 2013 10:00-11:00 in 17, on November by community, Yangpu Pingliang Prefecture, experimental selection Shanghai.
Table 1 is 10:00-16:00 period PM2.5 concentrations versus on October 4th, 2013, every hour record one secondary data.
Table 1
Line Chart according to table 1 matching is shown in Fig. 2.
Table 2 represented 10:00-11:00 period PM2.5 hour concentration contrast on November 17th, 2013, every ten minutes record one secondary data.
Table 2
Line Chart according to table 2 matching is shown in Fig. 3.
Above reference value all comes from PM2.5 monitoring net:
http://www.cnpm25.cn/city/shanghai.html
As shown in FIG. 2 and 3, fitting a straight line is substantially identical, and measurement result is more higher than reference value.PM2.5 concentration mainly affects by height, humidity, temperature, these four factors of wind-force.Because the instrument of monitoring point, city is generally all arranged on eminence, and measuring height of this experiment is lower, is more more close to dust from land surface, and the numerical value of PM2.5 will be bigger than normal, and for going out resident, more subaerial data more have reference value.
But, those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (4)
1. the particle concentration checkout equipment based on light scattering, it is characterized in that, comprise particle sampling cutter, scattered light intensity detector and circuit board display device, described particle sampling cutter is connected with described scattered light intensity detector, the incising control of this particle sampling cutter is 2.5 ± 0.2 μm, the geometric standard deviation of arresting efficiency is 1.2 ± 0.1 μm, described circuit board has data processing module and mass concentration conversion coefficient outer setting interface, described data processing module is connected with described scattered light intensity detector, described mass concentration conversion coefficient outer setting interface is connected with described data processing module, described display device is connected with described data processing module.
2. a kind of particle concentration checkout equipment based on light scattering according to claim 1, it is characterized in that, described circuit board is also provided with communication special purpose interface, described communication special purpose interface is connected with described data processing module.
3. a kind of particle concentration checkout equipment based on light scattering according to claim 1 and 2, it is characterized in that, described circuit board is also provided with power module, and described power module is connected with described data processing module.
4. a kind of particle concentration checkout equipment based on light scattering according to claim 3, is characterized in that, described mass concentration conversion coefficient outer setting interface is the cable interface for connecting computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410061150.3A CN104865173A (en) | 2014-02-21 | 2014-02-21 | Light scattering-based particulate matter concentration detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410061150.3A CN104865173A (en) | 2014-02-21 | 2014-02-21 | Light scattering-based particulate matter concentration detection device |
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| CN104865173A true CN104865173A (en) | 2015-08-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135897A (en) * | 2015-09-10 | 2015-12-09 | 湖南长重机器股份有限公司 | Self-adjusting system and method for PM 2.5 flue gas flow fields |
| CN105527208A (en) * | 2016-01-27 | 2016-04-27 | 北京市环境保护监测中心 | Correction method for mass concentration data of atmospheric particulates |
| CN106680161A (en) * | 2015-11-09 | 2017-05-17 | 无锡中衡环境科技有限公司 | Flying dust particulate monitoring system |
| CN113720741A (en) * | 2021-07-27 | 2021-11-30 | 深圳市正精达仪器有限公司 | Smoke concentration detection method and device, terminal equipment and medium |
-
2014
- 2014-02-21 CN CN201410061150.3A patent/CN104865173A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135897A (en) * | 2015-09-10 | 2015-12-09 | 湖南长重机器股份有限公司 | Self-adjusting system and method for PM 2.5 flue gas flow fields |
| CN105135897B (en) * | 2015-09-10 | 2018-02-13 | 湖南长重机器股份有限公司 | A kind of PM2.5 flue gas flow fields self-adjusting system and its method |
| CN106680161A (en) * | 2015-11-09 | 2017-05-17 | 无锡中衡环境科技有限公司 | Flying dust particulate monitoring system |
| CN105527208A (en) * | 2016-01-27 | 2016-04-27 | 北京市环境保护监测中心 | Correction method for mass concentration data of atmospheric particulates |
| CN113720741A (en) * | 2021-07-27 | 2021-11-30 | 深圳市正精达仪器有限公司 | Smoke concentration detection method and device, terminal equipment and medium |
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Application publication date: 20150826 |