US 9,310,419 B2Granted

Method for detecting defective electrodes in a micro-electrode matrix

AssigneeCommissariat a l'Energie Atomique

InventorsAlexandre Chibane, Pierre Grangeat

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Abstract

The method for detecting defective electrodes in an electrode matrix comprises measurement of an electrochemical impedance spectrum for each of the electrodes. Modeling of the spectrum impedance relative to each electrode by means of an implicit non-integral frequency model is performed in the form of a parameter matrix. Principal components analysis of the matrix is performed to transform said parameter matrix into a final matrix containing decorrelated variables representing the parameter matrix in a new space. The distance between each electrode and a reference point is calculated. These calculated distances are compared with a preset threshold distance and the electrodes having a distance greater than the threshold distance are classified as being defective.

Claims10

Dependent claims

A method for detecting a defective electrode in an electrode matrix comprising:

immersing a matrix of electrodes in an electrolyte;
connecting the matrix of electrodes to a potentiostat that applies a sine-wave signal to the matrix of electrodes;
measuring an impedance spectrum for one or more electrodes of the electrode matrix when the sine-wave signal is being applied to the matrix of electrodes;
representing the impedance spectrum by a first set of parameters based on a parametric model;
calculating a second set of parameters from the first set of parameters;
calculating a distance between the second set of parameters and a predetermined reference point;
comparing the calculated distance with a predetermined threshold distance;
and
classifying an electrode of the one or more electrodes as being defective if the calculated distance is greater than the threshold distance.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/847,799Filed 20 Mar 2013 · continuation
Priority: FR 07 0444621 Jun 2007
Published: US 2013/0297236 A17 Nov 2013
Granted: 12 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01R 31/1227
Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an…
G01N 27/4163
Systems: checking the operation of, or calibrating, the measuring apparatus
G01R
Measuring electric variables
G01N
Investigating or analysing materials by determining their chemical or physical properties