Capacitive measuring system

G - Physics – 01 – D

Patent

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Details

G01D 5/24 (2006.01) G01R 1/28 (2006.01)

Patent

CA 2451961

The invention relates to a measuring device comprising at least one measuring probe (10), means for sequentially applying a controlled supply voltage between the measuring probe (10) and a reference element, and means for integrating accumulated electric charges on the measuring probe (10), characterized in that said device also comprises at least one auxiliary measuring probe (100) which is also sequentially linked to controlled electric supply means and to charge integrating means, said auxiliary measuring probe (100) having a capacity, in relation to a potential detection zone, which is different from the main measuring probe (10), whereby comparative utilization of signals respectively emitted by the two measuring probes (10,100) enables the influence of the main measuring probe to be determined.

La présente invention concerne un dispositif de mesure comprenant au moins une sonde de mesure (10), des moyens aptes à appliquer séquentiellement une tension d'alimentation contrôlée entre la sonde de mesure (10) et un élément de référence et des moyens aptes à intégrer les charges électriques accumulées sur la sonde de mesure (10), caractérisé par le fait qu'il comprend en outre au moins une sonde de mesure auxiliaire (100), reliée également séquentiellement à des moyens d'alimentation électrique contrôlée et a des moyens d'intégration de charges, la dite sonde de mesure auxiliaire (100) présentant, vis à vis d'une zone potentielle de détection une capacite différente de la sonde de mesure principale (10), de telle sorte que I'exploitation comparative des signaux issus respectivement des deux sondes de mesure (10, 100) permette de déterminer I'influence de la sonde de mesure principale.

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