US 11,988,707 B2
Sensor status determination based on independent fundamental frequency measurements
Keith Ray, Houston, TX (US); and David Conn, Katy, TX (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 17/755,238
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Oct. 26, 2020, PCT No. PCT/US2020/070694
§ 371(c)(1), (2) Date Apr. 25, 2022,
PCT Pub. No. WO2021/081561, PCT Pub. Date Apr. 29, 2021.
Claims priority of provisional application 62/925,709, filed on Oct. 24, 2019.
Prior Publication US 2022/0373591 A1, Nov. 24, 2022
Int. Cl. G01R 31/28 (2006.01); G01D 3/08 (2006.01)
CPC G01R 31/2829 (2013.01) [G01D 3/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for detecting sensor malfunctioning status, comprising:
receiving sensor measurements of a first type from a first type of sensor;
deriving a first frequency associated with equipment that corresponds to the first type of sensor based on the sensor measurements of the first type and a first transformation algorithm;
receiving sensor measurements of a second type from a second type of sensor different than the first type of sensor associated with the equipment that corresponds to the first type of sensor and the second type of sensor, wherein the sensor measurements of the second type include a second frequency;
determining whether the first type of sensor or the second type of sensor is malfunctioning based on the first frequency being outside a threshold range with respect to the second frequency;
in response to determining that the first frequency is outside the threshold range with respect to the second frequency, determining that the first type of sensor is operating properly by:
deriving a third frequency based on the sensor measurements of the second type and a second transformation algorithm different from the first transformation algorithm; and
detecting that the first frequency is present in the third frequency; and
storing or outputting information representing the first type of sensor is operating properly.