US 10,104,510 B2 · Method for locating, via ultra high frequency, a mobile device for “hands-free” access to an automotive vehicle and associated locating device

Abstract

A method for locating, via ultra high frequency, a mobile device (T) for “hands-free” access to a vehicle (V), via a locating device (D′) on board the vehicle (V), the locating device (D′) including an ultra high frequency transceiver (10′), an electrical power supply source (Vcc) and an antenna (A′), the locating method being noteworthy in that the transceiver (10′) is disconnected from the antenna (A′), and that the transceiver (10′) is connected to an attenuation module (M1, M2, M3) located at a predetermined distance (L1, L2, L3) from the transceiver (10′) and including an impedance (Z1, Z2, Z3) of predetermined value connected to ground, the predetermined distance (L1, L2, L3) between the transceiver (10′) and the attenuation module (M1, M2, M3) and the predetermined value of the impedance (Z1, Z2, Z3) defining an area (A1, A2, A3) for locating the mobile device (T) around the vehicle (V).

Claims12

Dependent claims

A method for locating, via ultra high frequency, a mobile device for hands-free access to a vehicle, via a locating device on board the vehicle, said locating device comprising an electrical power supply source, and an ultra high frequency transceiver connected to an antenna via an electrical communication line, said locating method comprising:

disconnecting the transceiver from the antenna;
and
connecting the transceiver to an attenuation module located at a predetermined distance from the transceiver on the electrical communication line and comprising an impedance of predetermined value connected to ground, the predetermined distance between the transceiver and the attenuation module and the predetermined value of the impedance corresponding to an attenuation of ultra high frequency waves and defining an area for locating the mobile device around the vehicle.

A device for locating, via ultra high frequency, a mobile device for hands-free access, said locating device being on board an automotive vehicle and comprising:

an electrical power supply source;
an ultra high frequency transceiver, comprising a printed circuit board connected to an antenna via an electrical communication line;
on the electrical communication line, at least one attenuation module that is located at a predetermined distance from the transceiver, the at least one attenuation module comprising
a switch, and
an impedance of predetermined value, connected to ground, the predetermined distance between the transceiver and the at least one attenuation module along with the predetermined value of the impedance corresponding to an attenuation of ultra high frequency waves and defining an area for locating the mobile device around the vehicle;
a controller configured to control the at least one attenuation module;
a hardware location determining device configured to determine the location of the mobile device, the hardware location determining device being configured to electrically connected to the transceiver and to the controller,
wherein the switch has
a first position in which the transceiver is disconnected from the antenna and is electrically connected to the impedance associated with the switch, and;
a second position in which the switch electrically connects the transceiver to the antenna.

7 more elements

Dependencies are inferred from the claim text.

Method for locating, via ultra high frequency, a mobile device for “hands-free” access to an automotive vehicle and associated locating device

Life of this patent

Method for locating, via ultra high frequency, a mobile device for “hands-free” access to an automotive vehicle and associated locating device

Life of this patent

Abstract

Claims12