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Fine particle sensor with cascaded microscales

A micro balance and sensor technology, applied in the field of sensors, can solve the problems of few devices and no measuring devices, etc., and achieve the effect of compact processing and control, continuous and real-time monitoring

Pending Publication Date: 2021-11-30
科学和技术中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it should be noted that these devices are currently used very sparingly because of their many metering constraints (Berthelot, 2015)
[0007] It becomes very clear from the preceding elements that there are currently no devices for real-time or low time-step measurements of particle mass concentrations that meet European requirements and that are sized and operated for multiple deployments in indoor or outdoor environments

Method used

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  • Fine particle sensor with cascaded microscales
  • Fine particle sensor with cascaded microscales
  • Fine particle sensor with cascaded microscales

Examples

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Embodiment Construction

[0090] The present invention presents a sensor 1 for continuous in situ analysis of aerosol flows, which allows the measurement of the mass of micro / submicron particles 2 suspended in an air fluid, and at Figures 1 to 3 Indicated.

[0091] This sensor 1 comprises an aerodynamic sorting device which allows performing a granulometric determination of the particles 2 according to their size while integrating the measurement system.

[0092] The aerodynamic sorting device according to the present invention comprises:

[0093] - an impactor body 3 with one or more segments 4a, 4b, 4c connected in series, with a sampling head for particles at the inlet (the size of these particles, more specifically, the aerodynamic diameter corresponding to the mean diameter, favorably smaller than 10 microns, that is to say, the particles are called PM10 in the prior art), followed by flow tubes 6 for each segment, and along the direction of the aerosol flow: at least one axial nozzle 10, follow...

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Abstract

The present invention discloses a sensor (1) for the continuous in situ analysis of an aerosol stream allowing the mass of the micronic / submicronic particles (2) in suspension in the air stream to be measured, comprising an aeraulic sorting device allowing the particle size distribution of the particles (2) to be determined depending on their size with a cascade impactor body (3) with one or more stages; at least one MEMS microscale (7) per stage, with a silicon oscillating membrane (7a), situated on the particle impact zone (2); calculation means connected to each MEMS microscale (7) for determining the mass of all of the particles (2) on the impact zone; a system for cleaning the MEMS microscales allowing the particles (2) to be removed from the MEMS microscales; means for entraining the aerosol stream.

Description

technical field [0001] The present invention relates to sensors for measuring the mass concentration of fine particles of air pollution, potential indoor air and contamination of biological origin. Background technique [0002] Particulate matter pollution and all kinds adopted by the "Higher Council of Public Health (Haut Conseil de la Santé Publique)" (HCSP) ("Particulate matter pollution in the air environment 2 - Recommendations for the protection of health", 2012 ("Pollution par les particulates 2 dans I'air ambiant–Recommandations pour protéger la santé", 2012)) are associated with various cardiovascular, cerebrovascular and respiratory diseases through the mechanism of toxicity described. In 2013, the International Agency for Research on Cancer (IARC) classified air pollution and airborne particles as "definitely carcinogenic to humans" (Monograph on Carcinogenic Risk Assessment to Humans; Vol. 109). This pollution has also been identified as the cause of approximate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00G01N1/22G01N15/02G01G3/12G01G3/16
CPCG01G3/16G01N1/2208G01N5/00G01N2015/0261G01N15/0255
Inventor 艾曼纽·阿格雷乌格·索伊萨尔弗雷德里克·马蒂查尔斯·莫茨库斯昂里克·罗比纳布赖斯·贝特洛埃弗利娜·热安
Owner 科学和技术中心
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