US 12,007,301 B2
Variable composition gas mixture sensor
Robert Geiger, Seattle, WA (US); Jackson Matthew Pleis, Carnation, WA (US); Donald Kendrick, Bellevue, WA (US); and Christopher A. Wiklof, Everett, WA (US)
Assigned to ClearSign Technologies Corporation, Tulsa, OK (US)
Filed by ClearSign Technologies Corporation, Seattle, WA (US)
Filed on Dec. 28, 2020, as Appl. No. 17/135,517.
Application 17/135,517 is a continuation of application No. PCT/US2019/039467, filed on Jun. 27, 2019.
Claims priority of provisional application 62/821,543, filed on Mar. 21, 2019.
Claims priority of provisional application 62/756,468, filed on Nov. 6, 2018.
Claims priority of provisional application 62/702,475, filed on Jul. 24, 2018.
Claims priority of provisional application 62/694,890, filed on Jul. 6, 2018.
Claims priority of provisional application 62/691,469, filed on Jun. 28, 2018.
Prior Publication US 2021/0255063 A1, Aug. 19, 2021
Int. Cl. G01M 15/14 (2006.01); F23D 11/40 (2006.01); F23D 14/14 (2006.01); F23N 1/02 (2006.01); F23N 5/02 (2006.01); F23N 5/12 (2006.01); F23N 5/18 (2006.01); G01N 33/00 (2006.01)
CPC G01M 15/14 (2013.01) [F23D 11/406 (2013.01); F23D 14/145 (2013.01); F23N 1/022 (2013.01); F23N 5/022 (2013.01); F23N 5/123 (2013.01); F23N 5/184 (2013.01); G01N 33/0027 (2013.01); G01N 33/0062 (2013.01); G01N 33/0073 (2013.01); F23D 2208/10 (2013.01); F23D 2212/103 (2013.01); F23N 2237/26 (2020.01)] 40 Claims
OG exemplary drawing
 
1. A system for measuring a fuel-oxidant equivalence ratio, comprising:
at least one wall defining a gas volume, the gas including fuel and air;
a gas ionization source configured to cause a formation of ions in the gas;
a power supply configured to output a time-varying voltage;
a first electrode disposed in the gas volume, operatively coupled to the power supply, and configured to carry the time-varying voltage;
a second electrode, arranged to operatively couple to a signal from the first electrode through at least a portion of the gas volume;
a receiver circuit operatively coupled to the second electrode and configured to receive the signal, the signal having a characteristic corresponding to the fuel-oxidant equivalence ratio within the gas volume; and
a control circuit operatively coupled to the receiver circuit, configured to determine a value corresponding to the fuel-oxidant equivalence ratio.