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Microfabricated fractionator for particulate matter monitor

A technology for classifiers and monitors, applied in the field of manufacturing and/or implementing micro-processing classifiers, manufacturing vertical micro-processing classifiers

Inactive Publication Date: 2019-10-11
THE BOARD OF TRUSTEES OF THE UNIV OF ILLINOIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Embodiments address deficiencies of existing classifiers and PM monitors, providing enhanced compactness and manufacturability

Method used

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  • Microfabricated fractionator for particulate matter monitor
  • Microfabricated fractionator for particulate matter monitor
  • Microfabricated fractionator for particulate matter monitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] figure 1 An example particulate matter (PM) monitor 100 is shown for measuring the mass concentration of PM in an air sample according to aspects of the present disclosure.

[0024] PM monitor 100 draws in an air sample from the external environment. Inertial force filters the concentration of micron-sized PM contained in an air sample. PM pollutants can include, for example, coal dust, car exhaust, tobacco smoke, volcanic ash, and airborne particles to which humans are often allergic, such as pollen and food, ranging in size from a few nanometers to tens of microns.

[0025] PM monitor 100 includes a first channel 104 that receives an air sample via air inlet 102 . The PM monitor 100 also includes an air microfluidic circuit 106 in fluid communication with the first channel 104 . The microfluidic circuit 106 provides a vertical classifier as described in further detail below, which splits the air sample into two airflows: a first airflow continues in the first chann...

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Abstract

Microfabricated particulate matter (PM) monitors and fractionators within the PM monitors are provided. A primary channel of a vertical or out-of-plane fractionator receives air samples, comprising particles of varying sizes, from the external environment. The air samples then pass through a plurality of microfluidic channels, wherein inertial forces are applied within the microfluidic channels toseparate the particles by size. The fractionator comprises a horizontal air outlet for particles having a size below a threshold size and a vertical air outlet for particles having a size above a threshold size. Thus, the proportion of PM in the air sample is reduced prior to deposition on a PM monitor. A virtual cyclone may also be provided that comprises a bend positioned at a flow path througha primary channel of the vertical microfabricated fractionator.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 419,705, filed November 9, 2016, the contents of which are hereby incorporated by reference in their entirety. Background technique [0003] Airborne particulate matter (PM) pollutants are small solid particles or liquid droplets suspended in the atmosphere. PM pollutants may include, for example, automobile exhaust, tobacco smoke, coal dust, volcanic ash, or pollen. PM pollutants can range in size from a few nanometers to tens of microns. PM pollutants can be harmful to humans because their size allows them to enter the respiratory system and even blood. Therefore, PM monitors have been developed to detect PM pollutants. [0004] However, existing PM monitors are not sized and configured for convenient and portable use in different types of locations. Additionally, existing PM monitors often fail to provide reliable and accurate measureme...

Claims

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Application Information

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IPC IPC(8): G01N15/02F04B43/04G01N1/22G01N15/06G01N21/17
CPCG01N1/2205G01N1/2211G01N2001/2223G01N2015/0046G01N15/0255G01N15/0637F04B39/0027F04B45/043F04B45/047G01N15/0606F04B43/043G01N1/2273G01N1/24B01L3/502761B01L2300/0864B01L2200/0652
Inventor I·帕普罗特尼D·法希米O·玛赫达维保尔
Owner THE BOARD OF TRUSTEES OF THE UNIV OF ILLINOIS
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