US 11,874,170 B2
Air quality monitoring system and method
Anna Ailene Scott, Austin, TX (US); Yan Azdoud, Austin, TX (US); and Christopher Daniel Kelley, Austin, TX (US)
Assigned to PROJECT CANARY, PBC, Denver, CO (US)
Filed by Project Canary, PBC, Denver, CO (US)
Filed on Sep. 1, 2023, as Appl. No. 18/241,758.
Application 17/962,171 is a division of application No. 17/716,326, filed on Apr. 8, 2022, granted, now 11,467,032, issued on Oct. 11, 2022.
Application 17/716,326 is a division of application No. 17/540,497, filed on Dec. 2, 2021, granted, now 11,346,717, issued on May 31, 2022.
Application 17/540,497 is a division of application No. 16/953,908, filed on Nov. 20, 2020, granted, now 11,193,822, issued on Dec. 7, 2021.
Application 16/953,908 is a division of application No. 16/823,205, filed on Mar. 18, 2020, granted, now 10,876,890, issued on Dec. 29, 2020.
Application 16/823,205 is a division of application No. 16/188,793, filed on Nov. 13, 2018, granted, now 10,634,558, issued on Apr. 28, 2020.
Application 18/241,758 is a continuation of application No. 18/208,056, filed on Jun. 9, 2023, granted, now 11,788,889.
Application 18/208,056 is a continuation of application No. 18/113,311, filed on Feb. 23, 2023, granted, now 11,768,110.
Application 18/113,311 is a continuation of application No. 17/962,171, filed on Oct. 7, 2022, granted, now 11,604,094, issued on Mar. 14, 2023.
Prior Publication US 2023/0408334 A1, Dec. 21, 2023
Int. Cl. G01J 3/26 (2006.01); G01N 33/00 (2006.01); G01N 15/14 (2006.01); G02B 26/00 (2006.01)
CPC G01J 3/26 (2013.01) [G01N 15/1404 (2013.01); G01N 15/1436 (2013.01); G01N 33/0006 (2013.01); G01N 33/0031 (2013.01); G02B 26/001 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An air quality monitoring method comprising:
accepting analyte gas into a cell comprising:
a gas trap;
adjusting, via the gas trap, a flow rate of the analyte gas through the cell;
emitting light rays into the analyte gas;
reflecting the light rays into the analyte gas repeatedly across the cell;
directing the light rays across a path within the cell into at least one sensor in response to repeated reflections;
generating a first spectra signal and a second spectra signal in response to directing the light rays into the at least one sensor;
deconvoluting the first spectra signal and the second spectra signal based on properties of a light source emitting the light rays and optical properties of the at least one sensor at current temperature and pressure within the cell to generate a deconvoluted first spectra signal and a deconvoluted second spectra signal; and
determining a gaseous chemical based on the deconvoluted first spectra signal.