US 11,656,146 B2
Diagnostic system for a closed fluid system
Omid B. Nakhjavani, Tukwila, WA (US); Ryan K. Coleman, Seal Beach, CA (US); Franz David Betz, Seattle, WA (US); Greg Jackson, Tukwila, WA (US); Sean Warlick, Tukwila, WA (US); Darren Puigh, Bellevue, WA (US); Andrey Aleksandrovich Zaikin, Tukwila, WA (US); James Schimert, Tukwila, WA (US); and Steven C. Runo, Seattle, WA (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by THE BOEING COMPANY, Chicago, IL (US)
Filed on Dec. 6, 2017, as Appl. No. 15/833,564.
Prior Publication US 2019/0170606 A1, Jun. 6, 2019
Int. Cl. G01M 3/28 (2006.01); G05B 23/02 (2006.01)
CPC G01M 3/2876 (2013.01) [G05B 23/024 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A diagnostic system for a closed fluid system composed of a first fluid subsystem and a second fluid subsystem connected using a valve, the diagnostic system comprising:
a first sensor disposed in the first fluid subsystem and configured to measure a first fluid level of the first fluid subsystem, and output first time-ordered fluid level measurements corresponding thereto;
a second sensor disposed in the second fluid subsystem and configured to measure a second fluid level of the second fluid subsystem, and output second time-ordered fluid level measurements corresponding thereto; and
a computer coupled to the first sensor and the second sensor, and configured to:
receive the first time-ordered fluid level measurements and the second time-ordered fluid level measurements from respectively the first sensor and the second sensor;
perform a comparison of the first fluid level with the second fluid level from the first time-ordered fluid level measurements and the second time-ordered fluid level measurements;
produce a notification indicating a predicted malfunction of the valve when, based on the comparison, the first time-ordered fluid level measurements and the second time-ordered fluid level measurements have at least a threshold divergence; and
output the notification for display to a user,
wherein the computer configured to perform the comparison includes being configured to determine a correlation and an absolute difference between the first time-ordered fluid level measurements and the second time-ordered fluid level measurements that define a divergence thereof, and
wherein the computer configured to produce the notification includes being configured to produce the notification when the divergence is at least the threshold divergence.