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):
- 10495573
- Application Number:
- 16/007,513
- Assignee:
- Caubel, Julien J., Emeryville, CA (United States)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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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