Method for determining a probe signal, characterisation method using such a signal and device thereof

Patent metadata

Field	Value
Publication number	US-12007448-B2
Application number	US-202017783525-A
Country	US
Kind code	B2
Filing date	Dec 11, 2020
Priority date	Dec 16, 2019
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A method determines a probe signal for acoustically characterising an electrochemical system, the probe signal being determined by an identification signal transmitted in a reference electrochemical system to induce a response from the reference electrochemical system.

First claim

The invention claimed is:

1. A method for determining a probe signal for acoustically characterising an electrochemical system, the probe signal being determined by an identification signal transmitted in a reference electrochemical system so as to induce a response from the reference electrochemical system, the method comprising, for a plurality of operating points {PF i } of the reference electrochemical system, each operating point PF i being defined by at least one operating parameter wp j i of the reference electrochemical system:
a step of transmitting the identification signal, the identification signal being composed of a plurality of frequencies over a predetermined bandwidth and being chosen so as to establish a steady state within the reference electrochemical system and induce a linear response within the reference electrochemical system;
a step of measuring the response of the reference electrochemical system to the identification signal;
in such a way as to obtain a plurality of responses of the reference electrochemical system, each response being associated with a given operating point PF i ; the method further comprising:
a step of determining correlations between the operating parameter or parameters wp j i defining the considered operating point PF i and at least one feature of the response of the reference electrochemical system; and
a step of determining a probe signal from the feature or features wp i having a correlation with the operating parameter or parameters wp i above a predetermined threshold value.

2. The method according to claim 1 , wherein the response of the electrochemical system is associated with at least one time feature ct i and/or with at least one frequency feature cf i .

3. The method according to claim 1 , wherein a variation in the feature or features of the response of the electrochemical system between two extreme values of the operating parameter wp i or of at least one operating parameter wp i among the operating parameters wp i is also taken into account during the step of determining a probe signal.

4. A method for acoustically characterising an electrochemical system by a probe signal obtained using a method according to claim 1 , the method comprising a learning phase making it possible to establish correlations between at least one operating parameter wp i of the electrochemical system and at least two features of the response of the electrochemical system to the probe signal chosen from at least one time feature ct i and/or at least one frequency feature cf i ; and a characterisation phase of the state of the electrochemical system comprising:
a step of transmitting the probe signal in the electrochemical system in such a way as to induce a response in the electrochemical system;
a step of recording the response of the electrochemical system to the probe signal, the recording concerning the chosen features of the response; and
a step of determining the operating parameter or parameters wp i from features of the response recorded during the step of recording the response and from correlations determined during the learning phase.

5. The method according to claim 4 , wherein the correlations established during the learning phase concern at least one first operating parameter wp i and a second operating parameter, referred to as test parameter wp test , said parameters having been taken into account during the determining of the probe signal, and wherein the characterisation phase comprises:
a step of measuring the test parameter wp test , said step of measuring being concurrent with the step of transmitting the probe signal of the characterisation phase;
after the step of determining the operating parameter or parameters wp i , a step of evaluating the precision of the determining according to the measured value of the test parameter wp test and the value determined using correlations of this same parameter.

6. The method according to claim 5 , wherein, during the characterisation phase, when the precision evaluated during the step of evaluating the precision is below a predetermined threshold, the value of the parameter or parameters determined using correlations is invalidated.

7. The method according to claim 6 , wherein, during the characterisation phase, when the value of the operating parameters wp 1 is invalidated, the value of these operating parameters wp 1 is then determined according to the last known value of said parameters.

8. The method according to claim 6 , wherein the steps of the characterisation phase are repeated at regular intervals and wherein, when during a number of successive iterations greater than or equal to a predetermined threshold, the value of the operating parameter or parameters wp 1 determined using correlations is invalidated, the characterisation phase comprises a step of detecting an operating fault of the electrochemical system.

9. The method according to claim 4 , wherein the learning phase comprises, for at least one standard electrochemical system and for each operating point PF i of a plurality of operating points {PF i }:
a step of transmitting the probe signal in such a way as to induce a response in the electrochemical system;
a step of measuring the operating parameter or parameters wp i of the standard electrochemical system relative to the operating point CF i , said step of measuring being concurrent with the step of transmitting the probe signal;
a step of recording the response of the electrochemical system to the probe signal, the recording concerning at least two features of the response chosen from at least one time feature ct i and/or at least one frequency feature cf i ;
in such a way as to obtain a plurality of recordings of the response; the learning phase further comprising a step of determining correlations between the operating parameter or parameters wp i measured and the chosen features of the response.

10. The method according to claim 9 , wherein, during the step of determining correlations, each operating parameter wp i is weighted.

11. The method according to claim 9 , wherein a plurality of operating parameters {wp i } is measured during the step of measuring the operating parameter or parameters wp i and wherein, during the step of determining correlations, the determining of correlations for a given operating parameter wp i takes into account the other operating parameters wp j .

12. A method for managing an electrochemical system implementing a method according to claim 1 .

13. A device comprising means configured to implement a method according to claim 1 .

14. A computer program comprising instructions that, when the program is executed by a computer, lead the latter to implement the method according to claim 1 .

15. A non-transitory computer-readable storage medium on which is recorded the computer program comprising machine executable instruction for carrying out a method according to claim 1 .

Assignees

• Commissariat Energie Atomique

Inventors

• Guillet Nicolas
• Lespinats Sylvain

Classifications

• Y02E60/10

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• G01R31/392

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• G01R31/382 Primary

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