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Fine particle measuring device and measuring method

A fine particle and measuring device technology, applied in the direction of measuring device, particle suspension analysis, suspension and porous material analysis, etc., can solve the problems of PM2.5 measurement error and unknown particle density, and achieve the effect of eliminating influence and measuring accurately

Active Publication Date: 2015-11-25
YUANTAI AUTOMATION TECH SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually the laser scattering method is only sensitive to particles above 0.3 microns, and the density of the particles is also unknown, resulting in a large error in PM2.5 measurement

Method used

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  • Fine particle measuring device and measuring method
  • Fine particle measuring device and measuring method
  • Fine particle measuring device and measuring method

Examples

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Embodiment 1

[0043] see figure 1 , figure 2 as well as image 3 , as shown in the legend therein, a fine particle measuring device is used to detect the content of PM2.5 in the air, comprising a PM10 collector 1 for collecting air samples, a device for separating fine particles in the air samples A PM2.5 cutter 2, a detection device for detecting the content of fine particles in air samples, a filter 6 for collecting fine particles in air samples, a dryer 7 for removing moisture in air samples, and An air pump 8 based on a stable air flow and a flow splitting device 9 for recycling the purified residual gas, the detection device includes,

[0044] A 1# laser scattering sensor 3, used to measure the scattering intensity of fine particles in air samples;

[0045] A 2# laser scattering sensor 4, used to measure the scattering intensity of fine particles in air samples;

[0046] a signal processor 5, configured to convert the scattering intensity of the fine particles into the concentration...

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PUM

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Abstract

The invention discloses a fine particle measuring device for detecting PM 2.5 content in the air. The measuring device comprises a PM10 collector for collecting an air sample, a PM 2.5 cutter for separating fine particles of the air sample, a detector for detecting the fine particle content of the air sample, and an air pump for stabilizing an air current. The measuring device generates small measuring errors and can be monitored in real time. The invention also provides a measuring method for fine particles.

Description

technical field [0001] The invention relates to a fine particle measuring device, in particular to a fine particle measuring device and a measuring method thereof. Background technique [0002] Because fine particles are very harmful to human health, especially particles smaller than 2.5 microns, PM2.5 has a relatively small volume and a large specific surface area, so it is easy to absorb toxic substances, and these particles can easily reach the lungs Deep in the head, thus causing various lung diseases, for this reason the country has issued a newly revised "Ambient Air Quality" standard. The new standard increases the concentration limit detection standard of PM2.5. Therefore, there is an urgent need for a simple, reliable and inexpensive PM2.5 real-time measurement device. [0003] The most classic method of measuring PM2.5 is the filter membrane method invented in the 1950s. This method only requires a PM2.5 cutting head, a pump, a membrane holder and its filter memb...

Claims

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Application Information

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IPC IPC(8): G01N15/06
Inventor 贺竞人
Owner YUANTAI AUTOMATION TECH SUZHOU
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