Electrostatic sensor

G - Physics – 01 – R

Patent

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Details

G01R 29/14 (2006.01) A01K 11/00 (2006.01) G01D 5/24 (2006.01) F41H 11/12 (2006.01)

Patent

CA 2629614

An electrostatic sensor generally comprises a sensor head with at least one passive sensing electrode responsive to an electric field and a high-impedance amplification stage associated with the sensing electrode. The high-impedance amplification stage is configured for outputting at least one output signal in response to an electric signal induced on the at least one sensing electrode by the electric field. The sensor head further comprises a screen of electrically insulating material, which is associated with the at least one sensing electrode. In an operational mode of the electrostatic sensor, the screen is electrically charged and induces an electric field in the surroundings of the sensing electrode.

Le capteur électrostatique selon l~invention comprend généralement une tête de capteur avec au moins une électrode de captage passive répondant à un champ électrique et un étage d~amplification à forte impédance associé à l~électrode de captage. L~étage d~amplification à forte impédance est configuré pour émettre au moins un signal de sortie en réponse à un signal électrique induit sur ladite ou lesdites électrode(s) de captage par le champ électrique. La tête de capteur comprend en outre un écran de matériau électriquement isolant, qui est associé avec ladite ou lesdites électrode(s) de captage. Dans un mode de fonctionnement du capteur électrostatique, l~écran est chargé électriquement et induit un champ électrique dans le voisinage de l'électrode de captage.

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