Filter membrane-based uncertainty analysis method for automatically weighing concentrations of particulate matters in air

A standard uncertainty, particle technology, applied in the direction of particle suspension analysis, measuring device, suspension and porous material analysis, etc., can solve the problems that cannot be automated

Active Publication Date: 2019-06-11
HENAN PROVINCE INST OF METROLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem that the present invention aims at is: adopt filter membrane weighing method to measure the PM in the air in the prior art 2.5 When the concentration is high, the measurement process is affected by factors such as external temperature and humidity, and human factors, and automatic and batch detection cannot be realized; there is no measurement of PM in the air by the filter weighing method in the prior art. 2.5 Uncertain analysis of concentration, unable to effectively reduce PM 2.5 Factors affecting concentration measurement and improving the accuracy of measurement results

Method used

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  • Filter membrane-based uncertainty analysis method for automatically weighing concentrations of particulate matters in air
  • Filter membrane-based uncertainty analysis method for automatically weighing concentrations of particulate matters in air
  • Filter membrane-based uncertainty analysis method for automatically weighing concentrations of particulate matters in air

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Embodiment 1

[0105] The invention provides a particulate matter sampling and weighing device, see Figure 1-Figure 6 , the device includes a box body 100, a membrane disc 200, a gas collection unit 300, a weighing unit 400, and a transfer unit 500. In this embodiment, the box body 100 is a constant temperature and humidity box body. Specifically, it can be purified by setting an air filter device Filter the air in the box, set up an air circulation system, so that the temperature and humidity in the entire box can be evenly distributed, and set up a constant temperature unit and a constant humidity unit to heat or cool the air, humidify or dehumidify the air; further in the box 100 A support plate 101 made of marble is provided in the middle of the structure, and various components are arranged on the support plate 101 .

[0106] Specifically, the transfer unit 500 in this embodiment includes a guide seat 501, a vertical rod 503 matched in the guide seat, a lower bracket 502 arranged at th...

Embodiment 2

[0119]This embodiment adopts the device and system described in Embodiment 1 to detect PM in the air 2.5 The concentration of particulate matter is detected, and the specific process is as follows:

[0120] S1. Using the device and system described in Embodiment 1 to detect the PM in the unit volume of the gas to be measured 2.5 The concentration of particulate matter (1) is first detected by using this device to detect PM 2.5 Concentration indication error of particle concentration

[0121] According to the measurement range of the instrument, select three concentration measurement points. With a calibrated standard PM 2.5 The measuring instrument and the sampling system of the present invention sample at the same time, and each measurement point is repeatedly operated 3 times, and 3 values ​​of the detection concentration of the standard device are respectively taken Arithmetic mean ρ of 1 3 numerical values ​​related to the detection concentration of this sampling sys...

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Abstract

The invention discloses a filter membrane-based uncertainty analysis method for automatically weighing concentrations of particulate matters in air. According to the method, an automatic weighing andmeasuring system is firstly used for detecting a concentration of PM2.5 particulate matters in to-be-detected air and a mathematic model is established according to the detection result; uncertainty source analysis is carried out according to the established mathematic model and an uncertainty component is metered; and relative standard uncertainty and relative expanded uncertainty are synthesizedin sequence. According to the method, the measuring process is controlled by a computer without manual intervention, concentration values are displayed in real time, and various diagrams can be generated and stored for a long time. On the basis of data storage, the method carries out uncertainty assessment on the detection process, uncertainty components caused by system errors and random errorsare comprehensively analyzed in the uncertainty assessment, and the finally obtained uncertain data is correct and credible. According to the method, reliable data basis is provided for online metering.

Description

technical field [0001] The invention belongs to the technical field of air quality detection. Specifically, it relates to an uncertainty analysis method for measuring the concentration of particulate matter in the air based on automatic weighing of a filter membrane. Background technique [0002] With the development of my country's economy, air pollution is becoming more and more serious. The content of dust particles and harmful gases in the air is gradually increasing. Among them, respirable dust PM 10 , fine dust PM 2.5 After being inhaled, it will accumulate in the respiratory system and cause many diseases. Coarse particles can damage the respiratory system and induce asthma. Fine particulate matter may cause heart disease, lung disease, respiratory disease, and reduce lung function. The finer the particles, the more harmful they are to the human body, and they can even enter the alveoli and blood, which can be life-threatening in severe cases. PM 2.5 It also h...

Claims

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Application Information

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IPC IPC(8): G01N15/06
Inventor 樊玮邹君臣朱永宏王广俊闫继伟师恩洁路兴杰郝霞莉刘文思王琳
Owner HENAN PROVINCE INST OF METROLOGY
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