Method and system for correcting a temperature measurement...

G - Physics – 01 – K

Patent

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G01K 7/42 (2006.01) G01K 13/02 (2006.01)

Patent

CA 2745974

The method according to the invention includes: a step of digitally modeling, by means of a modeled signal (T2), a temperature measured by a sensor (10); a step of estimating a lag error signal (elag) for said sensor from the modeled signal (T2) and a signal (T3) that is obtained by filtering the modeled signal, said filtering being parameterized by an estimate of a time constant (t) of the sensor; and a step of correcting the measurement signal (T1) that is produced by the sensor (10) by means of the estimated lag error signal; said method being characterized in that the estimate of the time constant of the sensor is carried out on the basis of the time from the measurement signal (T1) and the modeled signal (T2).

Le procédé selon l'invention comprend : une étape de modélisation numérique, par un signal modélisé (T2), d'une température mesurée par un capteur (10); une étape d'estimation d'un signal d'erreur de traînage (%) pour ce capteur, à partir du signal modélisé (T2) et d'un signal (T3) obtenu par filtrage du signal modélisé, ce filtrage étant paramétré par une estimation d'une constante de temps (.tau.) du capteur; et une étape de correction du signal de mesure (T1) délivré par le capteur (10) à l'aide du signal d'erreur de traînage estimé; ledit procédé étant caractérisé en ce que l'estimation de la constante de temps du capteur est réalisée en fonction du temps à partir du signal de mesure (T1) et du signal modélisé (T2).

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