公开(公告)号：US20230213426A1

公开(公告)日：2023-07-06

申请号：US17998979

申请日：2021-05-20

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Aloka Khanna ,  Deepti Pachauri ,  Michael L. Munson

IPC: G01N15/06 ,  G01N15/02

CPC classification number: G01N15/06 ,  G01N15/0205 ,  G01N2015/0693

Abstract: A method and system of determining air quality are disclosed. In examples, a method comprises identifying one or more aerosol particle types based on an absorbance spectra of aerosol particles captured on a filter and determining a mass concentration of each of the one or more aerosol particle types based on the absorbance spectra and the aerosol particle type. The method further comprises detecting a median particle size of each of the one or more aerosol particle types based on a rate of change of the absorbance spectra and the aerosol particle type. The method further comprises determining an air quality metric based on the identified one or more aerosol particle types, the determined mass concentration of each of the one or more aerosol particle types, and the determined median particle size of each of the one or more aerosol particle types.

公开(公告)号：US20230213428A1

公开(公告)日：2023-07-06

申请号：US17998828

申请日：2021-04-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Aloka Khanna ,  Deepti Pachauri ,  Himanshu Jasuja ,  Michael L. Munson

IPC: G01N15/06 ,  G01N15/02 ,  B01D46/44 ,  B01D46/00

CPC classification number: G01N15/0618 ,  G01N15/0205 ,  B01D46/442 ,  B01D46/0086 ,  B01D2273/18

Abstract: A method and system of determining a filter life are disclosed. In examples, a method comprises capturing aerosol particles on a filter and measuring absorbance spectra of the aerosol particles captured on the filter. The method further comprises identifying one or more aerosol particle types based on the measured absorbance spectra and determining a mass accumulation of each of the one or more aerosol particle types based on the measured absorbance spectra and the aerosol particle type. The method further comprises determining a median particle size of each of the one or more aerosol particle types based on the measured absorbance spectra and the aerosol particle type and determining a filter life based on the determined mass accumulation and the determined median particle size of each of the one or more aerosol particle types.