A device for two-way detection of the approach of a portable apparatus for near-field hands-free access to a vehicle, said device including a communication antenna having a near-field communication frequency, the device including: a first passive inductive sensor oriented towards the outside of the vehicle, a second passive inductive sensor oriented towards the inside of the vehicle, the two sensors being arranged so as to face one another, separated by a ferrite, and receiving the electromagnetic field emitted by the communication antenna, and being capable of detecting the approach of the portable apparatus; a device for measuring a first voltage across the terminals of the first sensor and a device for measuring a second voltage across the terminals of the second sensor; a device for comparing the first voltage and the second voltage in order to detect the approach of the portable apparatus coming from outside or coming from inside the vehicle.
DISPOSITIF DE DETECTION BIDIRECTIONNELLE D'APPROCHE D'UN EQUIPEMENT PORTABLE D'ACCES MAIN LIBRE A UN VEHICULE ET PROCEDE DE DETECTION ASSOCIE
2017-11-17
Patent
Electronic Resource
French
European Patent Office | 2020
|European Patent Office | 2019
|PROCEDE DE DETECTION D'APPROCHE ET/OU DE CONTACT ET DISPOSITIF ASSOCIE
European Patent Office | 2016
|