US 12,272,190 B2
Monitoring method, computer program product, and associated monitoring system and aircraft by comparing an image of interest from a video stream to a library of signatures
Josselin Xavier Coupard, Moissy-Cramayel (FR); and Alrick Patrick Michel Jacques Verrier, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/632,472
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Aug. 6, 2020, PCT No. PCT/FR2020/051442
§ 371(c)(1), (2) Date Feb. 2, 2022,
PCT Pub. No. WO2021/023950, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 1909040 (FR), filed on Aug. 7, 2019.
Prior Publication US 2022/0277601 A1, Sep. 1, 2022
Int. Cl. B64F 5/00 (2017.01); B64D 45/00 (2006.01); G07C 5/08 (2006.01); B64D 47/08 (2006.01)
CPC G07C 5/0825 (2013.01) [B64D 45/00 (2013.01); G07C 5/0808 (2013.01); B64D 2045/0085 (2013.01); B64D 47/08 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of monitoring an aircraft apparatus, comprising:
receiving, from a video acquisition device, a video stream representing at least part of the apparatus;
performing a diagnostic, based on the video stream, of the video acquisition device, the performing the diagnostic of the video acquisition device comprises:
selecting at least two control images from the video stream, separated in time by a predetermined period, and
evaluating, from a result of a comparison of the at least two control images, at least one of a level of quality and a fault of the video acquisition device;
providing a sensor associated with the apparatus, the sensor being configured to generate, over time, a measurement signal representing an operation of the apparatus, the video stream and the measurement signal being synchronized;
in case of detection of fulfillment of a predetermined condition, extracting part of the video stream to form a sequence of interest, the predetermined condition being fulfilled if an anomaly is detected in the measurement signal generated by the sensor;
identifying, in the extracted sequence of interest, at least one image of interest;
comparing a signature, obtained by processing the at least one image of interest by at least one of filtering, adjusting contrast, edge detection, and adjusting colors based on the diagnostic of the video acquisition device, with at least one predetermined signature from a library of known signatures, the library of known signatures comprising a library of faults updated by learning at a time of occurrence of an event considered to be anomalous; and
generating an anomaly detection signal if the result of the comparison meets a predetermined criterion.