US 12,188,812 B2
Method for monitoring the operation of a machine generating vibrations and device for the implementation of such a method
François De Grimaudet De Rochebouet, Toulon (FR)
Assigned to STMicroelectronics International N.V., Geneva (CH)
Appl. No. 17/277,126
Filed by CARTESIAM, Toulon (FR)
PCT Filed Sep. 12, 2019, PCT No. PCT/EP2019/074339
§ 371(c)(1), (2) Date Mar. 17, 2021,
PCT Pub. No. WO2020/058075, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 1858412 (FR), filed on Sep. 18, 2018.
Prior Publication US 2022/0011154 A1, Jan. 13, 2022
Int. Cl. G01H 1/00 (2006.01); G01M 7/02 (2006.01); G05B 23/02 (2006.01); G06N 20/00 (2019.01)
CPC G01H 1/003 (2013.01) [G01M 7/025 (2013.01); G05B 23/0235 (2013.01); G05B 23/024 (2013.01); G06N 20/00 (2019.01)] 20 Claims
OG exemplary drawing
 
1. A method for monitoring the operation of a machine generating vibrations, the method comprising:
collecting, during a learning phase, a first vibratory signal generated by the machine during its normal operation, the first vibratory signal being collected in the time domain, the learning phase repeated periodically;
applying a transformation to the first vibratory signal to create a first vibratory signature;
creating a knowledge base by recording the first vibratory signature therein, the recording being in response to a first similarity rate between the first vibratory signature and each vibratory signature in the knowledge base being less than a predetermined first threshold;
collecting, during a monitoring phase, a second vibratory signal generated by the machine in the time domain, the machine autonomously switching from the learning phase to the monitoring phase in response to a creation of the knowledge base;
applying a transformation to the second vibratory signal to create a second vibratory signature; and
generating a warning in response to a second similarity rate between the second vibratory signature and each of the vibratory signatures in the knowledge base being less than a predetermined second threshold, the warning indicating an anomaly related to the second vibratory signature, wherein the predetermined second threshold is less than the predetermined first threshold.