Capacitive measuring sensor and associated ,measurement method
First Claim
1. Capacitive sensor including at least one measuring capacitor (Cm) having a first plate and a second plate of which at least one plate is a mobile plate capable of moving with respect to a rest position when, in a measuring phase, a measuring voltage is applied between the first and second plates, characterised in that it includes means for applying, simultaneously to the measuring voltage, between the first and second plates, an actuation voltage (Va) capable of bringing the first and second plates to a position substantially equal to the rest position.
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Accused Products
Abstract
The invention relates to a capacitive measuring sensor including at least one measuring capacitor (Cm) and means (I1, I2, I3) for applying, in a measuring phase, an actuation voltage to at least one plate of the measuring capacitor.
133 Citations
6 Claims
- 1. Capacitive sensor including at least one measuring capacitor (Cm) having a first plate and a second plate of which at least one plate is a mobile plate capable of moving with respect to a rest position when, in a measuring phase, a measuring voltage is applied between the first and second plates, characterised in that it includes means for applying, simultaneously to the measuring voltage, between the first and second plates, an actuation voltage (Va) capable of bringing the first and second plates to a position substantially equal to the rest position.
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6. Measuring method with the help of a capacitive sensor including at least one measuring capacitor (Cm) having a first plate and a second plate of which at least one plate is a mobile plate capable of moving, with respect to a rest position, when a measuring voltage is applied between the first and second plates, characterised in that it includes, simultaneously to the application of a measuring voltage between the first and second plates, the application, between said first and second plates, of an actuation voltage (Va) capable of bringing the first and second plates to a position substantially equal to the rest position.
Specification