Method for converting particle number concentration measured by using light scattering method into mass concentration and detector

A mass concentration and conversion method technology, which is applied in the field of concentration conversion methods and detectors, can solve problems such as K value differences and errors, and achieve accurate conversion and measurement

Inactive Publication Date: 2013-08-14
西藏净源科技有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0014] This method has good guiding significance, but the method recommends to use a K mean value in all cases, and this mean value is only measured in four specific indoor places, which is obviously not enough: firstly, different particle pollution concentrations The difference in the lower K values ​​is obvious, and if they are all unified into one value to calculate, it will inevitably cause a large error

Method used

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  • Method for converting particle number concentration measured by using light scattering method into mass concentration and detector
  • Method for converting particle number concentration measured by using light scattering method into mass concentration and detector
  • Method for converting particle number concentration measured by using light scattering method into mass concentration and detector

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no. 1 example

[0060] figure 1 is a flowchart of the transformation parameter calibration process according to the first embodiment of the present invention.

[0061] like figure 1 As shown, in step S1010, the particle number concentration R and the mass concentration C x The transformation model is determined as a non-linear transformation model C x = w env , x · C 0 = w env , x · K 1 , env ( R - B ) K 2 , env , in

[006...

no. 2 example

[0094] In this embodiment, the same symbols and subscripts as those in the first embodiment are used, and their meanings are the same as those in the first embodiment, so the description will not be repeated here.

[0095] figure 2 is a flowchart of the conversion parameter calibration process according to the second embodiment of the present invention.

[0096] like figure 2 As shown, in step S2010, the particle number concentration R and mass concentration C x The transformation method is determined as a nonlinear transformation model

[0097] Next, step S2020 is executed, in the selected reference measurement environment (such as outdoor atmosphere), for the reference mass concentration, such as PM10 or PM2.5, by measuring the control values ​​of multiple particle number concentrations and mass concentrations, directly use Double-parameter regression method returns the conversion coefficient K 1 and K 2 .

[0098] Then, in step S2030, by comparing the conversion c...

no. 3 example

[0103] In this embodiment, the same symbols and subscripts as those in the first embodiment are used, and their meanings are the same as those in the first embodiment, so the description will not be repeated here.

[0104] image 3 is a flowchart of the concentration conversion process according to the third embodiment of the present invention.

[0105] refer to image 3 , through the non-linear conversion model determined by the present invention, wherein the conversion parameters can be obtained in the manner described in the first embodiment or the second embodiment, and the conversion process can be completed by the following steps:

[0106] Step S3010: Measure the particle number concentration R of the inhalable particles in the air with a light-scattering particle detector;

[0107] Step S3020: Determine the conversion parameter K according to the measurement environment 1,env and K 2,env ;

[0108] Step S3030: Determine the conversion coefficient w according to the t...

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Abstract

The invention provides a method for converting the particle number concentration measured by using a light scattering method into the mass concentration, and a detector. The conversion method adopts an accurate dual-parameter nonlinear conversion model, and in the method, corresponding changes can be made according to the different particle number concentrations, different measurement environments and different concrete types of the outputted mass concentrations. Meanwhile, the invention also provides the portable particulate matter detector using the conversion method. The method and the detector provided by the invention can accurately complete the conversion between the particle number concentration and the mass concentration as well as the measurement of the particle number concentration and the mass concentration.

Description

technical field [0001] The invention relates to a concentration conversion method and a detector, in particular to a method and a detector for converting the particle number concentration measured by a light scattering method into a mass concentration. Background technique [0002] The measurement result of the light-scattering particle measuring instrument is the number of particles of particle pollution (number / minute, cpm), and the unit is generally the number of particles. Although the concentration can reflect the degree of particle pollution to a certain extent, due to the difference in mass of different particles is very Therefore, the relevant standards for particulate matter pollutants (including PM10, PM2.5) all use mass concentration units (mg / m 3 ). [0003] In previous related research, many people tried to study the relationship between these two indicators, and found that within a certain confidence interval, the two indicators can be converted to each other....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/49G01N15/06
Inventor 高鹏
Owner 西藏净源科技有限公司
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