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US 11,885,849 B2Granted
Method for monitoring a machine on the basis of electric current signals and device for implementing such a method
AssigneeSTMicroelectronics International N.V.
InventorsHe Huang, Francois De Grimaudet De Rochebouet
Life of this patent
Estimating the term…
Abstract
A method can be used for supervising the operation of a machine powered with electric current. The method includes operating the machine in a normal operation mode, repeatedly performing a learning phase for learning the normal operation machine of the machine to create a knowledge base, autonomously switching from the learning phase into a supervision phase when the knowledge base is considered to have been created, and repeatedly performing the supervision phase.
Claims20
A method for supervising an operation of a machine powered with electric current, the method comprising:
- collecting, 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, the learning phase repeated periodically;
- applying a transformation to the first electric current signal to a first electric current signature;
- creating 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;
- collecting, during a supervision phase, a second electric current signal generated by the machine in the time domain, the machine autonomously switching from the learning phase to the supervision phase in response to a creation of the knowledge base;
- applying a transformation to the second electric current signal to a second electric current signature;
- and
- generating 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.
4 more elements
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.
7 more elements
A machine comprising:
- a component operated using an electric current;
- an electric current sensor configured to acquire an electric current signal of the component;
- a memory storing a program;
- and
- a microcontroller coupled to the memory to execute the program 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, the learning phase repeated periodically;
- 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, the machine autonomously switching from the learning phase to the supervision phase in response to a creation of the knowledge base;
- apply a transformation to the second electric current signal to a second electric current signature;
- and
- 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, the warning indicating an anomaly related to the second electric current signature.
9 more elements
Dependencies are inferred from the claim text.