Motor vehicle equipped with a system for detecting the approach of a user
First Claim
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1. Motor Vehicle equipped with a system for detecting the approach of a user, comprising:
- a metallic surface which is isolated from a chassis of the vehicle and is connected to a high-frequency wave generator, so that the chassis of the vehicle and the surface define a radiating dipole with high impedance behaving as an untuned antenna which is underdimensioned relative to the wavelength, anda capacitance-variation detector which is connected to the metallic surface and detects a variation in a capacitance of the dipole, the capacitance of the dipole varies as a function of a capacitance of a capacitor formed by the metallic surface and the user, which capacitance increases when the user'"'"'s hand approaches the surface.
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Abstract
Motor vehicle equipped with a system for detecting the approach of a user, comprising a metallic surface (15) which is isolated from the chassis of the vehicle (V) and is connected to a high-frequency wave generator (16), so that the pair formed by the chassis of the vehicle and the said surface defines a radiating dipole, and a capacitance-variation detector (2) which is connected to the said surface and is intended to detect the variation in capacitance of a capacitor (C) formed by the (surface (15)/user'"'"'s hand) pair.
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Citations
20 Claims
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1. Motor Vehicle equipped with a system for detecting the approach of a user, comprising:
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a metallic surface which is isolated from a chassis of the vehicle and is connected to a high-frequency wave generator, so that the chassis of the vehicle and the surface define a radiating dipole with high impedance behaving as an untuned antenna which is underdimensioned relative to the wavelength, and a capacitance-variation detector which is connected to the metallic surface and detects a variation in a capacitance of the dipole, the capacitance of the dipole varies as a function of a capacitance of a capacitor formed by the metallic surface and the user, which capacitance increases when the user'"'"'s hand approaches the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification