CN108303359A - The two-parameter monitor of Atmospheric particulates list sampling channel and monitoring method - Google Patents
The two-parameter monitor of Atmospheric particulates list sampling channel and monitoring method Download PDFInfo
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Abstract
The invention discloses a kind of two-parameter monitor of Atmospheric particulates list sampling channel and monitoring methods, the monitor includes sample gas channel, the light scattering measurement module and beta radionetric survey modules set gradually on sample gas channel, and data processing unit, the wherein described light scattering measurement module is used to measure the ratio of PM10 and PM2.5 using light scattering method, the beta measurement modules are used to measure the concentration of PM10 using beta ray methods, the PM10 concentration that the ratio and the beta measurement modules that data processing unit is used to be provided according to the light scattering measurement module measure calculates the concentration of PM2.5.This method surveys two kinds of concentrations using a kind of equipment, highly combines beta methods and light scattering method advantage and bridge, realizes that low cost, low complex degree, equipment are simple, safeguards simple products.
Description
Technical field
The present invention relates to the monitoring fields atmospheric environment PM2.5 and PM10 more particularly to a kind of sampling of Atmospheric particulates list are logical
The two-parameter monitor in road and monitoring method.
Background technology
PM2.5 is also known as fine particle, particulate, fine grained, refers to that equivalent aerodynamic diameter is less than or equal to 2.5 microns
Grain object.It can be suspended in the air the long period, and content concn is higher in air, and it is more serious just to represent air pollution.
PM10 is also known as pellet, refers to the particulate matter of equivalent aerodynamic diameter≤10 micron.
The common measurement method of PM2.5 concentration has：Gravimetric method, β attenuation sensors, trace oscillating balance method, so far,
Since any measurement has error, so being practically without a kind of instrument and equipment can measure in air like clockwork
PM2.5 mass concentrations.As concussion sedimentation balance method, β ray methods and big flow or middle flow filter membrane method all can only be conditionally used for
Air PM2.5 mass concentrations monitor, therefore also need to add to improve in terms of instrument.
PM10 concentration often has with measurement method：Gravimetric method, micro concussion sedimentation balance method, β alpha cellulose a gage method, laser scattering method.Mesh
Before, most of environmentally friendly the most of of base stations use in China are beta ray methods.
Light-scattering measurement is that optical sensor measures the scattering light generated when light path of the particulate matter by 880nm wavelength,
The response of optical sensor and the concentration of particulate matter are linear, can be with the scatter light flux of Continuous plus second grade to obtain
Particle concentration value.Then, particulate matter can be deposited on glass fibre strainer.
β ray methods based on penalty method are that the measurement method of difference mechanism is replaced with compensation mechanism, overcome calculus of finite differences
The air of certain flow is continuously drawn into as sample air in sampling pipe by deficiency, is measured being set to the sampling pipe downstream
The capturing device of collecting zone filter bag etc. continuously traps the PM in aforementioned specimen gas, to the PM β rays trapped
Source (being usually C14 radioactive sources) irradiation β rays, when being mapped on PM due to the β rays that C14 radioactive sources radiate, β rays can be by PM
It absorbs so as to cause β radiation attenuations, the β transmitted intensities after decaying and PM relative densities are in correspondence, therefore when C14 is put
When the β ray energies that the source of penetrating is radiated are constant, the β transmitted intensities of PM are penetrated using detector, final realize uses the radiation absorption sides β
Formula measures the concentration of the PM trapped.
Professional environment monitoring needs provide the concentration value of PM2.5 and PM10 simultaneously, at present using it is more be two samplings
The Dual channel detection instrument in channel or two device measuring two kinds of particles object concentration.It will appear the 1 of PM2.5 in actually measuring
The PM10 situations that hourly average mass concentration is higher than cause " PM2.5 and PM10 are projecting ".
Invention content
The purpose of the present invention is to provide a kind of two-parameter monitors of Atmospheric particulates list sampling channel, realize single equipment
Two kinds of particles object concentration is monitored simultaneously with single sample gas channel, to solve the problems, such as " PM2.5 and PM10 are projecting ".
The present invention also aims to provide a kind of double concentration monitoring methods of Atmospheric particulates single channel, single equipment is realized
Two kinds of particles object concentration is monitored simultaneously with single sample gas channel, to solve the problems, such as " PM2.5 and PM10 are projecting ".
For this purpose, one aspect of the present invention provides a kind of two-parameter monitor of Atmospheric particulates list sampling channel, including sample gas
Channel, the light scattering measurement module set gradually on sample gas channel and beta radionetric surveys module and data processing
Unit, wherein the light scattering measurement module is used to measure the ratio of PM10 and PM2.5 using light scattering method, the beta is measured
Module is used to measure the concentration of PM10 using beta ray methods, and data processing unit according to the light scattering measurement module for carrying
The PM10 concentration that the ratio of confession and the beta measurement modules measure calculates the concentration of PM2.5.
Further, in the measurement period that the beta measurement modules measure PM10 concentration next time, at the data
Reason unit is modified the real-time ratio that the light scattering module measures, and revised ratio is used for the PM2.5
Concentration calculate.
According to another aspect of the present invention, a kind of two-parameter monitor of Atmospheric particulates list sampling channel is provided, including
At sample gas channel, the light scattering measurement module set gradually on sample gas channel, beta radionetric surveys module and data
Unit is managed, wherein the light scattering measurement module is used to measure the ratio of PM10 and PM2.5 using light scattering method, the beta is surveyed
The concentration that module is used to measure PM2.5 using beta ray methods is measured, the data processing unit is used to survey according to the light scattering
The PM2.5 concentration that the ratio and the beta measurement modules that amount module provides measure calculates the concentration of PM10.
Further, in the measurement period that the beta measurement modules measure PM2.5 concentration next time, at the data
Reason unit is used to be modified the real-time ratio that the light scattering module measures, and by revised ratio for described
The concentration of PM10 calculates.
The present invention also provides a kind of two-parameter monitoring methods of Atmospheric particulates list sampling channel, include the following steps：
With the real-time ratio for first passing through light scattering method measurement PM2.5 and PM10 in equally gas channel, then measured by beta ray methods
The concentration of PM10 and PM2.5 alternative one；It is right in the measurement period that beta ray methods measure PM10 or PM2.5 concentration
The real-time ratio amendment, and the concentration by revised ratio for the PM2.5 or PM10 calculates；According to revised
The concentration of ratio and PM10 the and PM2.5 alternative one measured calculates another concentration in PM10 and PM2.5 the two.
The present invention surveys two kinds of concentrations using a kind of one sample gas channel of equipment, highly combines beta methods and light scattering
Method advantage realizes product low cost, high certainty of measurement and the reliable composite request of result, PM2.5 and PM10 is effectively avoided to fall
It hangs.
Other than objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is described in further detail.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the two-parameter monitor of Atmospheric particulates list sampling channel according to the present invention；
Fig. 2 shows the structures of the light scattering module of the double concentration detectors of Atmospheric particulates single channel according to the present invention to show
It is intended to；And
Fig. 3 shows the principle schematic of the double concentration monitoring methods of Atmospheric particulates single channel according to the present invention.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Present invention combination beta ray methods and light scattering method, using single sample gas channel and same equipment, simultaneously
The concentration that two kinds of concentration, that is, PM2.5 and PM10 of particulate matter are monitored in monitoring of environmental air, reaches national standard method monitoring standard, keeps away
It is projecting to have exempted from PM2.5 and PM10, has had the advantages that two methods.
This monitor is mainly used in urban function region, Industrial Enterprise Factory Boundary, construction boundary and the monitoring of social life airborne dust
In field, airborne dust concentration is monitored, product is towards environment monitoring department, high pollution enterprise periphery, remote sensing, meteorology, climate change etc.
Department provides detection means for the fields such as climate change, environmental monitoring, remote sensing application dust from land surface concentration data.
In one embodiment, in conjunction with referring to Figure 1 and Figure 3, the two-parameter monitor of Atmospheric particulates list sampling channel includes sample
Gas channel 20, sampling channel 20 top be arranged sampler 10, be serially connected on sample gas channel light scattering module 30,
And host 40, beta radionetric surveys module 50 and data processing unit 60 are wherein equipped in host, light scattering module passes through logical
News bus is connected to host, realizes real-time Data Transmission.
As shown in Fig. 2, the entrance 31 of light scattering module 30 is in upper end, outlet 32 is serially connected in lower end in sample gas channel, interior
Portion's gas circuit 33 is used for light scattering measurement, and sample gas enters follow-up beta radionetric surveys module after oversampler, light scattering module 30.
During the work time, sample gas is filtered by sampler 10, into sample gas channel, then by the upper end of light scattering module
Entrance enters, and realizes light scattering method nondestructive measurement into inner air path, then sample gas enters host, by beta radionetric survey modules
50 carry out.
Wherein, light scattering module 30 is used to measure the ratio of PM10 and PM2.5 using light scattering method, in the host
Beta radionetric survey modules are used to measure the concentration of PM10 using beta ray methods, and data processing unit is used for according to ratio and dense
Degree calculates the concentration of PM2.5.
As shown in figure 3, the monitoring method of the two-parameter monitor of Atmospheric particulates list sampling channel of the present invention is as follows：
Sample gas is introduced into light scattering module after oversampler, and the ratio that PM10 and PM2.5 is measured by light scattering module is closed
It is K, then which is once measured the concentration of PM10, measurement week in shorter such as 1 minute by beta radionetric survey modules
Longer such as 1 hour of phase is primary, the concentration for the PM10 that then data processing unit 60 is obtained according to beta radionetric survey modules with
The proportionate relationship K obtained in the measurement period calculates PM, 2.5 concentration.
Preferably, the modification method of proportionate relationship K is as follows：
A, standard method PM10 concentration values PM10 is measuredbeta；
B, light scattering module measures the 1st minute PM10/PM2.5 concentration relative value k1, and light scattering module measures the 2nd minute
PM10/PM2.5 concentration relative value k2, light scattering module measure n-th minute PM10/PM2.5 concentration relative values kn；
C, n times concentration proportion, last K=(k1+k2+.....)/n, or the meter by way of iteration are measured in 60min
Calculate Kn=(Kn-1+kn)/2, n >=2；And
D, PM2.5=PM10 is calculatedbeta* K or PM2.5=PM10beta*Kn。
This method makes full use of beta methods and light scattering method principle, advantage, measures out two kinds of particles object concentration.We
Method breaks traditional thinking mode, indirectly measurement two kinds of particles object concentration, but a kind of high-precision directly measures PM10, another
Proportionate relationship is measured, then calculates another particle concentration, which is relative ratio, measures gas on-site at this time and fills
Divide both reactions real-time relationship, eliminating the other factors such as site environment, measuring apparatus, cross-ventilation influences PM10, PM2.5,
Measurement accuracy and reliability are improved, prevents from hanging upside down.
Light is dissipated module and is added in pipeline by monitor according to the present invention, air path part, is having no effect on beta methods just
It is often used, by beta radionetric survey PM10, data are accurate.
Preferably, in beta measurement modules, by adding a damping mechanism before radioactive source, pass through an adaptive calculation
Method adjusts attenuation in the reading of the GM counters of blank filter paper according to the count value of counter and measures the GM countings of dust-laden filter paper
The reading of device reaches identical corresponding counts value.It can get by attenuation in the case of two kinds of blank filter paper and dust-laden filter paper
Grain object concentration.
In another embodiment, light scattering module is used to measure the ratio of PM10 and PM2.5 using light scattering method, described
Beta measurement modules are used to measure the concentration of PM2.5, data processing unit, for according to ratio and concentration using beta ray methods
Calculate the concentration of PM10.
Preferably, in the measurement period that the beta measurement modules measure PM2.5 concentration next time, the data processing
The concentration of the real-time ratio that unit is measured according to the light scattering module, the concentration and PM10 of correcting the PM2.5 is simultaneously defeated in real time
Go out.
The Atmospheric particulates binary channels monitoring method of the present invention has the following technical effects：
(1) 1, computational methods are novel, unique；2, it is not necessarily to directly measure two kinds of particles object concentration, calculates and obtain indirectly
It takes, method is more effective, and hardware component is reduced；3, sampling element is reduced, and reduces the risk of error of the links such as calibration, O＆M；4, melt
Beta ray methods and light scattering method advantage are closed, the deficiency of the two is made up.
(2) 1, it is greatly reduced in equipment cost, two equipment become a hardware, reduce by 50% cost；2, O＆M letter
Single, installation cost simplifies, and labour cost reduces；Day-to-day loss part (paper tape etc.) continues expense deduction and exemption；3, plateform system software is opened
Hair simplifies, and archives foundation need not be cumbersome；4, administrative department's more manageability, management cost reduce.5, be easier, convenient monitoring it is more
Local air quality for environmental quality monitoring, provides more channels.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of two-parameter monitor of Atmospheric particulates list sampling channel, which is characterized in that including sample gas channel, in the sample gas
The light scattering measurement module and beta radionetric surveys module and data processing unit set gradually on channel, wherein
The light scattering measurement module is used to measure the ratio of PM10 and PM2.5, the beta measurement modules using light scattering method
Concentration for measuring PM10 using beta ray methods, what data processing unit was used to be provided according to the light scattering measurement module
The PM10 concentration that ratio and the beta measurement modules measure calculates the concentration of PM2.5.
2. the two-parameter monitor of Atmospheric particulates list sampling channel according to claim 1, which is characterized in that described
Beta measurement modules are measured next time in the measurement period of PM10 concentration, and the data processing unit surveys the light scattering module
The real-time ratio obtained is modified, and the concentration by revised ratio for the PM2.5 calculates.
3. a kind of two-parameter monitor of Atmospheric particulates list sampling channel, which is characterized in that including sample gas channel, in the sample gas
Light scattering measurement module, beta radionetric surveys module and the data processing unit set gradually on channel, wherein
The light scattering measurement module is used to measure the ratio of PM10 and PM2.5, the beta measurement modules using light scattering method
Concentration for being measured PM2.5 using beta ray methods, the data processing unit are used for according to the light scattering measurement module
The PM2.5 concentration that the ratio of offer and the beta measurement modules measure calculates the concentration of PM10.
4. the two-parameter monitor of Atmospheric particulates list sampling channel according to claim 3, which is characterized in that described
Beta measurement modules are measured next time in the measurement period of PM2.5 concentration, and the data processing unit is used for the light scattering
The real-time ratio that module measures is modified, and the concentration by revised ratio for the PM10 calculates.
5. a kind of two-parameter monitor of Atmospheric particulates list sampling channel, which is characterized in that include the following steps：
The real-time ratio that light scattering method measures PM2.5 and PM10 is first passed through in equally gas channel, then passes through beta rays
Method measures the concentration of PM10 and PM2.5 alternative one；
In the measurement period that beta ray methods measure PM10 or PM2.5 concentration, to the real-time ratio amendment, and will
Concentration of the revised ratio for the PM2.5 or PM10 calculates；And
According to modified ratio PM2.5/PM10 and the concentration of the PM10 and PM2.5 alternative one measured, PM10 is calculated
With the concentration of another in PM2.5 the two.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109791101A (en) * | 2018-09-05 | 2019-05-21 | 武汉四方光电科技有限公司 | Method and device that is a kind of while measuring different diameter airborne particle mass concentration |
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| KR20210016624A (en) * | 2018-09-05 | 2021-02-16 | 큐빅 센서 앤드 인스트루먼트 컴퍼니 리미티드 | Method and apparatus for simultaneously measuring mass concentration of particulate matter of different particle size |
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| KR102435967B1 (en) | 2018-09-05 | 2022-08-24 | 큐빅 센서 앤드 인스트루먼트 컴퍼니 리미티드 | Method and apparatus for simultaneously measuring mass concentrations of particulate matter of different particle sizes |
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