Electrostatic Sensor
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United States of America Patent
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Issued Date -
Dec 11, 2008
app pub date -
Dec 15, 2006
filing date -
Dec 23, 2005
priority date (Note) -
Abandoned
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Abstract
An electrostatic sensor generally includes 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 includes 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.
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