CN104596900B - Method and system for automatically realizing grain size correction of atmosphere particles - Google Patents
Method and system for automatically realizing grain size correction of atmosphere particles Download PDFInfo
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- CN104596900B CN104596900B CN201510007478.1A CN201510007478A CN104596900B CN 104596900 B CN104596900 B CN 104596900B CN 201510007478 A CN201510007478 A CN 201510007478A CN 104596900 B CN104596900 B CN 104596900B
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Abstract
The invention discloses a method and a system for automatically realizing grain size correction of atmosphere particles. The system comprises an acquiring unit, a calculation processing unit and a replacing unit. The method comprises the following steps: A, acquiring current sample feeding measuring pressure; B, carrying out calculation processing on the acquired sample feeding measuring pressure according to a mapping relation mathematic model among air dynamic diameters of the atmosphere particles, flight time and the sample feeding measuring pressure so as to calculate to obtain a grain diameter correction curve; and C, replacing the current grain diameter correction curve into the grain diameter correction curve calculated by the step B. By virtue of the method and the system, errors of an instrument grain diameter detection result caused by the air pressure change of the external environment are overcome, so that the accuracy of a data result can be ensured when the air pressure of an instrument is changed. The system and the method can be widely applied to a particle grain diameter detection device.
Description
Technical field
The present invention relates to the automatic Implementation Techniques that grain-size of atmospheric particulate substance is corrected in particle size detection means, especially relate to
And one kind, under certain sample introduction measurement range of pressure fluctuations, particle size detection means is automatically obtained grain-size of atmospheric particulate substance school
Positive method and system.
Background technology
At present, it is usually under a certain pressure by particulate matter to carry out particle size detection by aerodynamic method
Accelerated by aperture, the speed that particulate matter is obtained is related to its aerodynamic diameter.For traditional particle size
Detection means, its operation principle is：Particulate matter is incorporated into aerodynamic lens interior by a sample introduction aperture, and described enters
Sample aperture determines the forefront pressure of quality stream sample introduction and aerodynamic lens；Particulate matter again through lens combination step by step
Focus on, at the perforation hole for leaving lens collide and accelerated with gas molecule；Under a certain specific forefront pressure,
The speed of particulate matter keeps certain functional relationship with its aerodynamic diameter；The speed of particulate matter is detected, then
The speed for detecting is contrasted with particle diameter calibration trace, so as to the aerodynamic that just can accurately extrapolate particulate matter is straight
Footpath；Described particle diameter calibration curve is by under pressure with the spheroidal particle of standard single dispersing particle diameter to variable grain
Thing carries out velocity correction, and so as to be fitted the curve of formation, i.e., described particle diameter calibration curve is the particle diameter of spheroidal particle and flight
The matched curve of time.
However, the final movement velocity of particulate matter is closely related with the forefront pressure of aerodynamic lens, therefore,
When forefront pressure occurs small pressure oscillation, the final speed of particulate matter can also change, and now using existing
Particle diameter calibration trace, then can cause the deviation of droplet measurement.And, forefront pressure occurs the reason for slight pressure changes to be included
Have：1st, the change of ambient pressure environment can cause the change of forefront pressure；2nd, prolonged sampling can cause aperture edge to occur
The situations such as particle rich, Partial Blocking, so that forefront pressure changes.Therefore, in order to ensure the accurate of grain diameter measurement
Property, user then needs the situation of change for paying close attention to constantly forefront pressure, and needs usually to carry out the maintenance clean of appliance arrangement,
Operation ease is low.
The content of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide one kind measures range of pressure fluctuations in certain sample introduction
Under, the method that particle size detection means is automatically obtained grain-size of atmospheric particulate substance correction.
It is a further object of the present invention to provide one kind is under certain sample introduction measurement range of pressure fluctuations, particle size detection
The system that device is automatically obtained grain-size of atmospheric particulate substance correction.
The technical solution adopted in the present invention is：A kind of method for being automatically obtained grain-size of atmospheric particulate substance correction, the method
Including：
The current sample introduction measurement pressure of A, acquisition；
Mapping between B, the aerodynamic diameter according to Atmospheric particulates, flight time and sample introduction measurement pressure is closed
It is mathematical model, the sample introduction measurement pressure to obtaining carries out calculating process, so as to calculate a particle diameter calibration trace；
C, current particle diameter calibration trace is replaced with into the particle diameter calibration trace that step B is calculated.
Further, between the aerodynamic diameter of the Atmospheric particulates, flight time and sample introduction measurement pressure
Mapping relations mathematical model contains the particle diameter of spheroidal particle and the fit equation corresponding to the matched curve of flight time, sample introduction
Fit equation and constant parameter corresponding to the matched curve of the flight time of measurement pressure and spheroidal particle；
The particle diameter of the spheroidal particle is the first fit equation with the fit equation corresponding to the matched curve of flight time,
Fit equation corresponding to the matched curve of the flight time of the sample introduction measurement pressure and spheroidal particle is the second fit equation.
Further, step B includes：
B1, the sample introduction measurement pressure according to acquisition, the second fit equation and constant parameter, so as to calculate in acquisition
Flight time under sample introduction measurement pressure corresponding to the spheroidal particle of different-grain diameter；
B2, the flight time according to corresponding to the spheroidal particle of the first fit equation and the different-grain diameter for calculating, from
And carry out curve fitting, to draw a particle diameter calibration trace.
Further, fit equation of the first described fit equation for exponential form, the second described fit equation are two
The fit equation of order polynomial.
Further, be additionally provided with before step A set up the aerodynamic diameter of Atmospheric particulates, the flight time and
The step of sample introduction measures the mapping relations mathematical model between pressure；
Mapping between the aerodynamic diameter for setting up Atmospheric particulates, flight time and sample introduction measurement pressure
The step for relation mathematic model, which includes：
S1, determine particle size detection means receptible sample introduction measurement pressure maximum and minima；
S2, measure in sample introduction and between the maximum and minima of pressure, choose multiple different sample introductions measurement pressure；
S3, under each sample introduction chosen measurement pressure, respectively the spheroidal particle of multiple different-grain diameters is flown
The detection of time, so as to obtain under each sample introduction chosen measurement pressure, the flight time of the spheroidal particle of different-grain diameter；
S4, according to the flight time of the spheroidal particle of the particle diameter and different-grain diameter of spheroidal particle, so as to carry out curve plan
Close, to obtain under each sample introduction chosen measurement pressure, the particle diameter of spheroidal particle and the matched curve of flight time are described
The particle diameter of spheroidal particle is the first fit equation with the fit equation corresponding to the matched curve of flight time；
S5, according to multiple different sample introductions measurement pressure and the flight time of the spheroidal particle of different-grain diameter, so as to enter
Row curve matching, to obtain the matched curve of sample introduction measurement pressure and the flight time of spheroidal particle, the sample introduction measures pressure
The fit equation corresponding to matched curve with the flight time of spheroidal particle is the second fit equation；
Mapping between S6, the aerodynamic diameter for making Atmospheric particulates, flight time and sample introduction measurement pressure is closed
When being flight of the mathematical model comprising the first fit equation, the second fit equation and sample introduction measurement pressure and spheroidal particle
Between matched curve corresponding to constant parameter.
Another technical scheme of the present invention is：A kind of system for being automatically obtained grain-size of atmospheric particulate substance correction, should
System includes：
Acquiring unit, for obtaining current sample introduction measurement pressure；
Calculation processing unit, measures for the aerodynamic diameter according to Atmospheric particulates, flight time and sample introduction
Mapping relations mathematical model between pressure, the sample introduction measurement pressure to obtaining carry out calculating process, so as to calculate one
Footpath calibration trace
Replacement unit, for current particle diameter calibration trace is replaced with the particle diameter correction that calculation processing unit is calculated
Curve.
Further, between the aerodynamic diameter of the Atmospheric particulates, flight time and sample introduction measurement pressure
Mapping relations mathematical model contains the particle diameter of spheroidal particle and the fit equation corresponding to the matched curve of flight time, sample introduction
Fit equation and constant parameter corresponding to the matched curve of the flight time of measurement pressure and spheroidal particle；
The particle diameter of the spheroidal particle is the first fit equation with the fit equation corresponding to the matched curve of flight time,
Fit equation corresponding to the matched curve of the flight time of the sample introduction measurement pressure and spheroidal particle is the second fit equation.
Further, the calculation processing unit includes：
Computing module, for according to sample introduction measurement pressure, the second fit equation and the constant parameter for obtaining, so as to calculate
Go out the flight time corresponding to the spheroidal particle of different-grain diameter under the sample introduction measurement pressure for obtaining；
Curve fitting module, for according to corresponding to the spheroidal particle of the first fit equation and the different-grain diameter for calculating
Flight time, so as to carry out curve fitting, to draw a particle diameter calibration trace.
Further, fit equation of the first described fit equation for exponential form, the second described fit equation are two
The fit equation of order polynomial.
The invention has the beneficial effects as follows：The method of the present invention is by adopting the aerodynamic diameter of Atmospheric particulates, flying
Mapping relations mathematical model between row time and sample introduction measurement pressure measures pressure suitable for current sample introduction so as to calculate
Particle diameter calibration trace, can so overcome the error of the instrument droplet measurement result brought by external environment air pressure change so that
Instrument also ensures that the accuracy of data result in air pressure change.And user is also without continually tieing up to appliance arrangement
Shield cleaning, operation ease are high.
The present invention another beneficial effect be：The system of the present invention is straight by the aerodynamic using Atmospheric particulates
Mapping relations mathematical model between footpath, flight time and sample introduction measurement pressure is measured suitable for current sample introduction so as to calculate
The particle diameter calibration trace of pressure, can so overcome the error of the instrument droplet measurement result brought by external environment air pressure change,
So that instrument also ensures that the accuracy of data result in air pressure change.And user is also without continually entering to appliance arrangement
Row maintenance clean, operation ease are high.
Description of the drawings
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further：
Fig. 1 be the present invention it is a kind of be automatically obtained grain-size of atmospheric particulate substance correction method the step of flow chart；
Fig. 2 is the particle diameter of spheroidal particle and the matched curve of flight time under each sample introduction chosen measurement pressure
Schematic diagram；
Fig. 3 is the matched curve schematic diagram of sample introduction measurement pressure and the flight time of spheroidal particle；
Fig. 4 is an a kind of specific embodiment steps flow chart of the method for being automatically obtained grain-size of atmospheric particulate substance correction of the present invention
Figure；
Fig. 5 is the particle diameter of spheroidal particle and the matched curve schematic diagram of flight time under new sample introduction measurement pressure；
Fig. 6 is a kind of structured flowchart of the system for being automatically obtained grain-size of atmospheric particulate substance correction of the present invention.
Specific embodiment
Described sample introduction measurement pressure is the forefront pressure of aerodynamic lens, and described particle diameter is air force
Learn diameter.
As shown in figure 1, a kind of be automatically obtained the method that grain-size of atmospheric particulate substance is corrected, the method includes：
The current sample introduction measurement pressure of A, acquisition；
Mapping between B, the aerodynamic diameter according to Atmospheric particulates, flight time and sample introduction measurement pressure is closed
It is mathematical model, the sample introduction measurement pressure to obtaining carries out calculating process, so as to calculate a particle diameter calibration trace；
C, current particle diameter calibration trace is replaced with into the particle diameter calibration trace that step B is calculated.
Be further used as preferred embodiment, the aerodynamic diameter of the Atmospheric particulates, the flight time and
Mapping relations mathematical model between sample introduction measurement pressure contains the particle diameter of spheroidal particle and the matched curve institute of flight time
Corresponding fit equation, sample introduction measurement pressure and spheroidal particle flight time matched curve corresponding to fit equation and
Constant parameter；
The particle diameter of the spheroidal particle is the first fit equation with the fit equation corresponding to the matched curve of flight time,
Fit equation corresponding to the matched curve of the flight time of the sample introduction measurement pressure and spheroidal particle is the second fit equation.
It is further used as preferred embodiment, step B includes：
B1, the sample introduction measurement pressure according to acquisition, the second fit equation and constant parameter, so as to calculate in acquisition
Flight time under sample introduction measurement pressure corresponding to the spheroidal particle of different-grain diameter；
B2, the flight time according to corresponding to the spheroidal particle of the first fit equation and the different-grain diameter for calculating, from
And carry out curve fitting, to draw the particle diameter of a spheroidal particle and the matched curve of flight time, i.e. a particle diameter calibration trace.
It is further used as preferred embodiment, the first described fit equation is the fit equation of exponential form, described
The second fit equation for quadratic polynomial fit equation.
It is further used as preferred embodiment, before step A, is additionally provided with the air force for setting up Atmospheric particulates
The step of learning the mapping relations mathematical model between diameter, flight time and sample introduction measurement pressure；
Mapping between the aerodynamic diameter for setting up Atmospheric particulates, flight time and sample introduction measurement pressure
The step for relation mathematic model, which includes：
S1, determine particle size detection means receptible sample introduction measurement pressure maximum and minima；
S2, measure in sample introduction and between the maximum and minima of pressure, choose multiple different sample introductions measurement pressure, and it is right
In multiple different sample introduction measurement pressure how are chosen between maximum and minima, the selection mode can be according to practical situation
And set；
S3, under each sample introduction chosen measurement pressure, respectively the spheroidal particle of multiple different-grain diameters is flown
The detection of time, so as to obtain under each sample introduction chosen measurement pressure, the flight time of the spheroidal particle of different-grain diameter；
S4, according to the flight time of the spheroidal particle of the particle diameter and different-grain diameter of spheroidal particle, so as to carry out curve plan
Close, to obtain under each sample introduction chosen measurement pressure, the particle diameter of spheroidal particle and the matched curve of flight time are described
The particle diameter of spheroidal particle is the first fit equation with the fit equation corresponding to the matched curve of flight time；
S5, according to multiple different sample introductions measurement pressure and the flight time of the spheroidal particle of different-grain diameter, so as to enter
Row curve matching, to obtain the matched curve of sample introduction measurement pressure and the flight time of spheroidal particle, the sample introduction measures pressure
The fit equation corresponding to matched curve with the flight time of spheroidal particle is the second fit equation；
Mapping between S6, the aerodynamic diameter for making Atmospheric particulates, flight time and sample introduction measurement pressure is closed
When being flight of the mathematical model comprising the first fit equation, the second fit equation and sample introduction measurement pressure and spheroidal particle
Between matched curve corresponding to constant parameter.
One specific embodiment of the inventive method
First, the aerodynamic diameter of Atmospheric particulates, reflecting between flight time and sample introduction measurement pressure are set up
Relation mathematic model is penetrated, and the aerodynamic diameter for setting up Atmospheric particulates, flight time and sample introduction measure pressure
Between mapping relations mathematical model the step for, which includes：
（1）, determine particle size detection means in use receptible sample introduction measure the maximum of pressure
And minima, such as maximum is 2.6torr, and minima is 1.6torr；
（2）, measure in sample introduction and between the maximum and minima of pressure, choose multiple different sample introductions measurement pressure, specifically
Ground, chooses multiple sample introduction measurement pressure between 1.6 torr-2.6torr, it will usually choose 6 different sample introduction measurement pressures
Power, and test the value respectively 1.604,1.736,1.978,2.220,2.440,2.505torr of the sample introduction measurement pressure selected；
（3）, under each sample introduction chosen measurement pressure, to particle diameter be respectively 300nm, 500nm, 720nm,
The standard spheroidal particle of 1000nm, 2000nm carries out the detection of flight time, so as to the sample introduction measurement for obtaining choosing at each
Under pressure, flight time of the particle diameter corresponding to the standard spheroidal particle of 300nm, 500nm, 720nm, 1000nm, 2000nm；
（4）, according to the flight time of the spheroidal particle of the particle diameter and different-grain diameter of spheroidal particle, so as to carry out curve plan
Close, to obtain under each sample introduction chosen measurement pressure, the particle diameter of spheroidal particle and the matched curve of flight time, i.e.
Under six different sample introduction measurement pressure, the particle diameter of a spheroidal particle and the matched curve of flight time can be respectively obtained,
As shown in table 1 and Fig. 2, described table 1 is as follows：
Table 1
Wherein, above-mentioned fit equation Y represents the aerodynamic diameter of particulate matter particle, and X represents particulate matter particle
Flight time；Under the sample introduction measurement pressure of 1.604torr, the particle diameter of spheroidal particle is Y=with the matched curve of flight time
0.01024exp（-X/（-199.26946））+ 0.04109, under the sample introduction measurement pressure of 1.736torr, the grain of spheroidal particle
Footpath is Y=0.00747exp with the matched curve of flight time（-X/（-176.54349））+ 0.06726, and 1.978,
2.220th, 2.440, the sample introduction measurement pressure of 2.505torr, the functional expression of the matched curve then and so on, these matched curves
Fitting precision R2It is more than 0.99；And the fit equation corresponding to the matched curve of the particle diameter of spheroidal particle and flight time
Y=A1exp (- X/t1)+y0 is the first fit equation；
The flight time of particulate matter particle can be become apparent from not only with aerodynamic diameter in good by Fig. 2
Exponential relationship, but also with sample introduction measurement pressure be in fine dependency relation；
（5）, according to multiple different sample introductions measurement pressure and under different sample introduction measurement pressure different-grain diameter ball
The flight time of shape particle, so as to carry out curve fitting, to obtain the plan of sample introduction measurement pressure and the flight time of spheroidal particle
Curve is closed, as shown in Table 2 and Figure 3, described table 2 is as follows：
Table 2
Wherein, above-mentioned fit equation Y represents that sample introduction measurement pressure torr, X represent the flight time of particulate matter particle；It is right
In particle diameter for 300nm spheroidal particle, the matched curve of sample introduction measurement pressure and its flight time be Y=（1.478×10-5）X2
+（-0.02197）X+9.595, for particle diameter is the spheroidal particle of 500nm, sample introduction measurement pressure and the fitting of its flight time
Curve be Y=（1.182×10-5）X2 +（-0.02068）X+10.52, and for particle diameter is 720nm, 1000nm and 2000nm
Spheroidal particle, the sample introduction measures the functional expression of pressure and the matched curve of its flight time then and so on, and these fittings are bent
The fitting precision R of line2It is more than 0.99；And the data of above-mentioned P1, P2 and P3 are then sample introduction measurement pressure and spheroidal particle
Constant parameter corresponding to the matched curve of flight time, and from the foregoing, matched curve correspondence one group of P1, P2 and P3
Data；Sample introduction measures the fit equation Y=P1X corresponding to the matched curve of the flight time of pressure and spheroidal particle2 +
P2X+P3 are the second fit equation；
（6）, make Atmospheric particulates aerodynamic diameter, the flight time and sample introduction measurement pressure between mapping close
It is that mathematical model includes the first fit equation Y=A1exp (- X/t1)+y0, the second fit equation Y=P1X2 + P2X + P3
And constant parameter P1, P2 and P3 corresponding to the matched curve of the flight time of the sample introduction measurement pressure and spheroidal particle.
By setting up above-mentioned mathematical model, so it is known that the particulate matter particle of any one particle diameter is in any pressure
Flight speed below power, so as to carry out the conversion of particle size.
As shown in figure 4, a kind of method for being automatically obtained grain-size of atmospheric particulate substance correction, which specifically includes：
The current sample introduction measurement pressure of step 1, acquisition, such as current sample introduction measurement pressure is 2.1torr；
Step 2, the sample introduction measurement pressure according to acquisition, the second fit equation and constant parameter, are obtaining so as to calculate
Flight time under the sample introduction measurement pressure for taking corresponding to the spheroidal particle of different-grain diameter；
As shown in Table 2 above, according to the second fit equation and constant parameter, it can be deduced that 5 sample introductions measurement pressure with
The functional expression of the matched curve of the flight time of spheroidal particle, i.e., 5, and pass through this 5 functional expressions, can calculate and measure in sample introduction
Pressure be 2.1torr under, the flight time of the spheroidal particle of different-grain diameter, i.e. particle diameter be respectively 300nm, 500nm, 720nm,
Flight time corresponding to the spheroidal particle of 1000nm, 2000nm, as shown in table 3, the table 3 is as follows：
Table 3
Step 3, the flight time according to corresponding to the spheroidal particle of the first fit equation and the different-grain diameter for calculating,
So as to carry out curve fitting, i.e., this group of data shown in table 3 being carried out curve fitting, being applied to when advance so as to just can be derived that
Particle diameter and the matched curve of flight time of the sample measurement pressure for the spheroidal particle of 2.1torr, i.e., one surveys suitable for current sample introduction
Amount pressure for 2.1torr particle diameter calibration trace, as shown in figure 5, the dotted line in Fig. 5 be then expressed as it is above-mentioned suitable for current sample introduction
Particle diameter calibration trace of the measurement pressure for 2.1torr；
Step 4, current particle diameter calibration trace is replaced with into the particle diameter calibration trace that step 3 is calculated.
For the elaboration of the invention described above method, which is suitable for the system of the present invention.
As shown in fig. 6, a kind of be automatically obtained the system that grain-size of atmospheric particulate substance is corrected, the system includes：
Acquiring unit, for obtaining current sample introduction measurement pressure；
Calculation processing unit, measures for the aerodynamic diameter according to Atmospheric particulates, flight time and sample introduction
Mapping relations mathematical model between pressure, the sample introduction measurement pressure to obtaining carry out calculating process, so as to calculate one
Footpath calibration trace
Replacement unit, for current particle diameter calibration trace is replaced with the particle diameter correction that calculation processing unit is calculated
Curve.
Be further used as preferred embodiment, the aerodynamic diameter of the Atmospheric particulates, the flight time and
Mapping relations mathematical model between sample introduction measurement pressure contains the particle diameter of spheroidal particle and the matched curve institute of flight time
Corresponding fit equation, sample introduction measurement pressure and spheroidal particle flight time matched curve corresponding to fit equation and
Constant parameter；
The particle diameter of the spheroidal particle is the first fit equation with the fit equation corresponding to the matched curve of flight time,
Fit equation corresponding to the matched curve of the flight time of the sample introduction measurement pressure and spheroidal particle is the second fit equation.
It is further used as preferred embodiment, the calculation processing unit includes：
Computing module, for according to sample introduction measurement pressure, the second fit equation and the constant parameter for obtaining, so as to calculate
Go out the flight time corresponding to the spheroidal particle of different-grain diameter under the sample introduction measurement pressure for obtaining；
Curve fitting module, for according to corresponding to the spheroidal particle of the first fit equation and the different-grain diameter for calculating
Flight time, so as to carry out curve fitting, to draw a particle diameter calibration trace.
It is further used as preferred embodiment, the first described fit equation is the fit equation of exponential form, described
The second fit equation for quadratic polynomial fit equation.
It is more than that the preferable enforcement to the present invention is illustrated, but the invention is not limited to the enforcement
Example, those of ordinary skill in the art on the premise of without prejudice to spirit of the invention can also be made a variety of equivalent variations or be replaced
Change, the deformation or replacement of these equivalents are all contained in the application claim limited range.
Claims (5)
- It is 1. a kind of to be automatically obtained the method that grain-size of atmospheric particulate substance is corrected, it is characterised in that：The method includes：The current sample introduction measurement pressure of A, acquisition；B, the aerodynamic diameter according to the sample introduction measurement pressure and Atmospheric particulates for obtaining, flight time and sample introduction measurement The second fit equation included in mapping relations mathematical model and constant parameter between pressure, is obtaining so as to calculate Sample introduction measurement pressure under different-grain diameter spheroidal particle corresponding to flight time；Then according to the different-grain diameter for calculating The aerodynamic diameter of flight time and Atmospheric particulates corresponding to spheroidal particle, flight time and sample introduction measurement pressure The first fit equation included in mapping relations mathematical model between power, so as to carry out curve fitting, to draw a particle diameter Calibration trace；Wherein, the second described fit equation is corresponding to the matched curve of the flight time that sample introduction measures pressure and spheroidal particle Fit equation, described the first fit equation is the particle diameter of spheroidal particle and the fitting corresponding to the matched curve of flight time Equation；C, current particle diameter calibration trace is replaced with into the particle diameter calibration trace that step B is calculated.
- It is 2. a kind of according to claim 1 to be automatically obtained the method that grain-size of atmospheric particulate substance is corrected, it is characterised in that：Described Fit equation of first fit equation for exponential form, the second described fit equation are the fit equation of quadratic polynomial.
- It is 3. a kind of according to claim 1 to be automatically obtained the method that grain-size of atmospheric particulate substance is corrected, it is characterised in that：The step It is additionally provided with before rapid A and sets up the aerodynamic diameter of Atmospheric particulates, reflecting between flight time and sample introduction measurement pressure The step of penetrating relation mathematic model；Mapping relations between the aerodynamic diameter for setting up Atmospheric particulates, flight time and sample introduction measurement pressure The step for mathematical model, which includes：S1, determine particle size detection means receptible sample introduction measurement pressure maximum and minima；S2, measure in sample introduction and between the maximum and minima of pressure, choose multiple different sample introductions measurement pressure；S3, under each sample introduction chosen measurement pressure, is respectively carried out to the spheroidal particle of multiple different-grain diameters the flight time Detection, so as to obtain under each sample introduction chosen measurement pressure, the flight time of the spheroidal particle of different-grain diameter；S4, according to the flight time of the spheroidal particle of the particle diameter and different-grain diameter of spheroidal particle, so as to carry out curve fitting, with Obtain under each sample introduction chosen measurement pressure, the particle diameter of spheroidal particle and the matched curve of flight time are described spherical The particle diameter of particle is the first fit equation with the fit equation corresponding to the matched curve of flight time；S5, according to multiple different sample introductions measurement pressure and the flight time of the spheroidal particle of different-grain diameter, so as to march Line is fitted, to obtain the matched curve of sample introduction measurement pressure and the flight time of spheroidal particle, the sample introduction measurement pressure and ball Fit equation corresponding to the matched curve of the flight time of shape particle is the second fit equation；Mapping relations number between S6, the aerodynamic diameter for making Atmospheric particulates, flight time and sample introduction measurement pressure Learn flight time of the model comprising the first fit equation, the second fit equation and sample introduction measurement pressure and spheroidal particle Constant parameter corresponding to matched curve.
- It is 4. a kind of to be automatically obtained the system that grain-size of atmospheric particulate substance is corrected, it is characterised in that：The system includes：Acquiring unit, for obtaining current sample introduction measurement pressure；Calculation processing unit, for aerodynamic diameter, flight according to the sample introduction measurement pressure and Atmospheric particulates for obtaining The second fit equation included in mapping relations mathematical model and constant parameter between time and sample introduction measurement pressure, So as to calculate the flight time under the sample introduction measurement pressure for obtaining corresponding to the spheroidal particle of different-grain diameter；Then according to meter When the aerodynamic diameter of flight time and Atmospheric particulates corresponding to the spheroidal particle of the different-grain diameter for calculating, flight Between and sample introduction measurement pressure between mapping relations mathematical model included in the first fit equation, so as to carry out curve plan Close, to draw a particle diameter calibration trace；Wherein, the second described fit equation is the flight that sample introduction measures pressure and spheroidal particle Fit equation corresponding to the matched curve of time, the first described fit equation are the particle diameter of spheroidal particle and flight time Fit equation corresponding to matched curve；Replacement unit, for current particle diameter calibration trace is replaced with the particle diameter correction song that calculation processing unit is calculated Line.
- It is 5. a kind of according to claim 4 to be automatically obtained the system that grain-size of atmospheric particulate substance is corrected, it is characterised in that：Described Fit equation of first fit equation for exponential form, the second described fit equation are the fit equation of quadratic polynomial.
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| CN105067490A (en) * | 2015-08-12 | 2015-11-18 | 广东省环境监测中心 | Monitoring method of online SPAMS (single particle aerosol mass spectrometer) |
| CN106018194A (en) * | 2016-05-18 | 2016-10-12 | 深圳市青核桃科技有限公司 | Method using laser particle counting machine to calculate particle mass |
| CN111380650B (en) * | 2020-06-01 | 2020-09-18 | 深圳市千分一智能技术有限公司 | Pressure curve calibration method, device, equipment and readable storage medium |
| CN112504922B (en) * | 2020-10-20 | 2022-09-02 | 华南师范大学 | Online measurement system and method for particle size distribution of atmospheric particulates |
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