Method and apparatus for non-intrusive, continuous noise...

G - Physics – 01 – C

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G01C 19/72 (2006.01)

Patent

CA 2285590

The extra bandwidth of a fiber optic sensor is suitably appropriated to determine the integrity of a sensor. The present apparatus preferably consists of a means for finding the amplitude of the noise within the chosen frequency range which preferably includes one of several types of signal processors. Once the amplitude of noise is suitably determined from the sensor's output, the computed amplitude is suitably compared to pre-established upper and lower noise bounds. If the noise amplitude falls outside these bounds, a flag or interrupt is set to notify the system processor or other monitoring device of the sensor failure.

La largeur de bande complémentaire d'un capteur à fibre optique permet de déterminer l'intégrité d'un capteur. Ce dispositif est composé de préférence de moyens permettant de relever l'amplitude du bruit dans une plage de fréquences sélectionnée, ces moyens comportant, de préférence, un processeur de signal choisi parmi plusieurs types de processeurs. Une fois que l'amplitude du bruit est convenablement déterminée à la sortie du capteur, elle est comparée à des limites de bruit supérieure et inférieure prédéfinies. Si l'amplitude du bruit se situe en dehors de ces limites, un drapeau est mis en place ou une interruption est déclenchée pour signaler la défaillance du capteur au processeur du système ou à une autre unité de surveillance.

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