US 12,436,137 B2
Systems and methods for membrane blockage detection in gas detectors
Jon K. Evju, Shakopee, MN (US); and Robert L. Fillmore, Bloomington, MN (US)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed by Carrier Corporation, Palm Beach Gardens, FL (US)
Filed on Oct. 10, 2022, as Appl. No. 18/045,217.
Claims priority of provisional application 63/262,982, filed on Oct. 25, 2021.
Prior Publication US 2023/0129686 A1, Apr. 27, 2023
Int. Cl. G01N 33/00 (2006.01)
CPC G01N 33/007 (2013.01) 20 Claims
OG exemplary drawing
 
1. A gas detector comprising:
a membrane configured to define a sensing chamber of the gas detector;
a strain sensor operatively connected to the membrane, the strain sensor configured for generating output signals related to strain in the membrane; and
a controller operatively connected to the strain sensor, the controller configured to:
determine a strain in the membrane based on the output signals; and
determine a condition of the membrane based on the determined strain, wherein the determined condition indicates whether the membrane is blocked.