Patent ID: 11885849
Assignee: STMICROELECTRONICS INTERNATIONAL N.V.
Field: Measurement (Instruments)
Classification: CPC G  F | IPC G

Claim 11:
12. A device intended for a machine powered with electric current, the device comprising:
an electric current sensor configured to acquire an electric current signal;
a microcontroller configured to:
collect, during a learning phase, a first electric current signal generated by the machine during a normal operation of the machine, the first electric current signal being collected in the time domain;
apply a transformation to the first electric current signal to a first electric current signature;
create a knowledge base by recording the first electric current signature therein, the recording being in response to a first similarity rate between the first electric current signature and each electric current signature in the knowledge base being less than a predetermined first threshold;
collect, during a supervision phase, a second electric current signal generated by the machine in the time domain;
apply a transformation to the second electric current signal to a second electric current signature;
generate a warning in response to a second similarity rate between the second electric current signature and each of the electric current signatures in the knowledge base being less than a predetermined second threshold, and the warning indicating an anomaly related to the second electric current signature; and

a memory configured to record the electric current signature.