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Title: Instrument for measuring airborne particulate matter

Abstract

An apparatus for measuring the optical absorption of airborne matter or other light absorbing species in a sample airflow. The apparatus comprises a flow path through a fibrous filter to collect light absorbing species in the sampled air. The filtered airflow may subsequently pass through a second filter, used for reference measurements. At least one light source impinges in the filter generating one or two optical signals to determine the light absorption of particulate matter or other species in the sampled airflow. The apparatus includes at least one auxiliary sensor in the sample flow path to monitor an environmental factor, such as temperature. During a training period, a mathematical model of the apparatus' environmental sensitivity is derived. Using the mathematical model and measurements from the auxiliary sensor, optical signals are compensated in real time to increase the precision and accuracy of light absorption measurements recorded under fluctuating environmental conditions.

Inventors:
; ;
Issue Date:
Research Org.:
Caubel, Julien J., Emeryville, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1600355
Patent Number(s):
10,495,573
Application Number:
16/007,513
Assignee:
Caubel, Julien J., Emeryville, CA (United States)
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/13/2018
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Caubel, Julien J., Cados, Troy E., and Kirchstetter, Thomas W. Instrument for measuring airborne particulate matter. United States: N. p., 2019. Web.
Caubel, Julien J., Cados, Troy E., & Kirchstetter, Thomas W. Instrument for measuring airborne particulate matter. United States.
Caubel, Julien J., Cados, Troy E., and Kirchstetter, Thomas W. Tue . "Instrument for measuring airborne particulate matter". United States. https://www.osti.gov/servlets/purl/1600355.
@article{osti_1600355,
title = {Instrument for measuring airborne particulate matter},
author = {Caubel, Julien J. and Cados, Troy E. and Kirchstetter, Thomas W.},
abstractNote = {An apparatus for measuring the optical absorption of airborne matter or other light absorbing species in a sample airflow. The apparatus comprises a flow path through a fibrous filter to collect light absorbing species in the sampled air. The filtered airflow may subsequently pass through a second filter, used for reference measurements. At least one light source impinges in the filter generating one or two optical signals to determine the light absorption of particulate matter or other species in the sampled airflow. The apparatus includes at least one auxiliary sensor in the sample flow path to monitor an environmental factor, such as temperature. During a training period, a mathematical model of the apparatus' environmental sensitivity is derived. Using the mathematical model and measurements from the auxiliary sensor, optical signals are compensated in real time to increase the precision and accuracy of light absorption measurements recorded under fluctuating environmental conditions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {12}
}

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Works referenced in this record:

Aethalometer
patent, January 1990


Method for automatic performance diagnosis and calibration of a photometric particle analyzer
patent, April 2015


Multichannel gas analyzer and method of use
patent, March 1990


Airway adapter with backflush tube
patent, August 1991