US 12,146,870 B1
Calibration of humidity and methane inside gas sensor housing
Andrew J. Speck, Cambridge, MA (US); Aditi Chakrabarti, Cambridge, MA (US); Mathieu Dauphin, Cambridge, MA (US); and Albert Ballard Andrews, Cambridge, MA (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Apr. 30, 2024, as Appl. No. 18/650,878.
Int. Cl. G01N 33/00 (2006.01)
CPC G01N 33/0006 (2013.01) [G01N 33/0014 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for calibrating methane measurements from a methane sensor device with a closed housing and an absorbent filter, comprising:
receiving a plurality of external temperature and humidity measurements from an external atmospheric sensor, the plurality of external temperature and humidity measurements having been iteratively taken over a period of time;
receiving a plurality of internal temperature and humidity measurements from an internal atmospheric sensor, the plurality of internal temperature and humidity measurements having been iteratively taken over the period of time;
calculating, using the plurality of internal temperature and humidity measurements and the plurality of external temperature and humidity measurements, predicted internal relative and absolute humidity values;
training a calibration model using additional external temperature and humidity measurements and the predicted internal relative and absolute humidity values;
receiving a methane gas measurement from a methane gas sensor; and
applying the calibration model to the methane gas measurement.