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US 2022/0091188 A1Published application
Method for monitoring a machine on the basis of electric current signals and device for implementing such a method
AssigneeCartesiam
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 the operation of a machine powered with electric current, the method comprising:
- operating the machine in a normal operation mode;
- performing a learning phase for learning the normal operation of the machine, the learning phase being periodically repeated 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
- performing the supervision phase, the supervision phase being periodically repeated;
- wherein the learning phase comprises:
- acquiring, in the time domain, a first electric current signal generated by the machine;
- determining a first electric current signature corresponding to the first electric current signal;
- determining a first similarity rate between the first electric current signature and each electric current signature recorded in the knowledge base;
- comparing the first similarity rate with a predetermined first threshold;
- and
- recording the first electric current signature in the knowledge base when the first similarity rate is lower than the first threshold;
- and
- wherein the supervision phase comprises:
- acquiring, in the time domain, a second electric current signal generated by the machine;
- determining a second electric current signature corresponding to the second electric current signal;
- determining a second similarity rate between the second electric current signature and each of the electric current signatures recorded in the knowledge base;
- comparing the second similarity rate with a predetermined second threshold;
- and
- generating a warning when the second similarity rate is lower than the second threshold, the warning to indicate an anomaly related to the second electric current signature.
17 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 programmed to determine an electric current signature corresponding to the electric current signal, to determine a similarity rate between the electric current signature and a knowledge base in which electric current signatures are recorded, and to compare the similarity rate with a predetermined threshold;
- and
- a memory configured to record the electric current signature.
1 more element
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 supervise operation of the component by repeatedly performing a learning phase, autonomously switching from the learning phase into a supervision phase when a knowledge base is considered to have been created, and repeatedly performing the supervision phase;
- wherein the learning phase comprises:
- acquiring, in the time domain, a first electric current signal generated by the machine;
- determining a first electric current signature corresponding to the first electric current signal;
- determining a first similarity rate between the first electric current signature and each electric current signature recorded in the knowledge base;
- comparing the first similarity rate with a predetermined first threshold;
- and
- recording the first electric current signature in the knowledge base when the first similarity rate is lower than the first threshold;
- and
- wherein the supervision phase comprises:
- acquiring, in the time domain, a second electric current signal generated by the machine;
- determining a second electric current signature corresponding to the second electric current signal;
- determining a second similarity rate between the second electric current signature and each of the electric current signatures recorded in the knowledge base;
- comparing the second similarity rate with a predetermined second threshold;
- and
- generating a warning when the second similarity rate is lower than the second threshold, the warning to indicate an anomaly related to the second electric current signature.
17 more elements
Dependencies are inferred from the claim text.