System for managing a sensor for detecting an intention to open and/or unlock an opening panel of a motor vehicle
A system that is intended to be integrated into a motor vehicle, includes a medium-range detection module for measuring a current distance relative to a portable user authentication device; and an intention sensor for detecting an intention to open and/or unlock an opening panel of the motor vehicle. The medium-range detection module has a standby state and an active state. It is able to receive control data for controlling its standby or active state, and, in response, to switch from its standby state to its active state. The intention sensor has a standby state and an active state. It is able to receive control data for controlling its standby or active state, and, in response, to switch from its standby state to its active state, with said control data depending on a detection carried out by the medium-range detection module.
1 . A system for managing an intention sensor, the system comprising:
a long-range detector and authenticator configured to be integrated into the motor vehicle and to exchange data user with a portable authentication device to detect an arrival of an authenticated user within a wide perimeter;
a medium-range detector configured to be integrated into the motor vehicle and to measure a current distance relative to the portable user authentication device via a two-way communication therewith; and
an intention sensor configured to be integrated into the motor vehicle and is able to detect an intention, expressed by a user, to one or more of open and unlock an opening panel of the motor vehicle,
wherein the medium-range detector has a standby state and an active state, the medium-range detector being configured to receive control data as input sto control the standby state or the active state, and, in response, to switch from the standby state to the active state, with said control data depending on the long-range detector and authenticator detecting the arrival of the authenticated user within the wide perimeter,
in the active state only of the medium-range detector, the medium-range detector is configured to carry out successive measurements of current distance relative to the portable user authentication device, in order to detect the arrival of the authenticated user within a predetermined restricted perimeter,
the intention sensor has a standby state and an active state, the intention sensor being configured to detect said intention to one or more of open and unlock the opening panel when it the intention sensor is in the active state only, and
the intention sensor is configured to receive control data as input to control the standby state or the active state, and, in response, to switch from the standby state to the active state of the intention sensor, with said control data depending on the medium-range detector detecting the arrival of the user within the restricted perimeter.
2 . The system as claimed in claim 1 , wherein the medium-range detector comprises at least one transmitter and receiver system that is configured to transmit and receive an ultra-wideband radio-frequency signal, having a spectral band with a width that is strictly greater than 500 MHz or is strictly greater than 20% of a central frequency of said spectral band.
3 . The system as claimed in claim 1 , wherein said control data to control the standby state or the active state of the intention sensor depend on data relating to a movement of the user toward the motor vehicle, the control data being obtained using the medium-range detector.
4 . The system as claimed in claim 1 , wherein the intention sensor comprises a capacitive-type presence sensor that is configured to be integrated into a handle on the motor vehicle and to detect the presence of the user in close proximity to said handle.
5 . The system as claimed in claim 4 , wherein the intention sensor further comprises a short-range authenticator that is configured to exchange authentication data with the portable user authentication device to authenticate said user.
6 . The system as claimed in claim 1 , wherein the intention sensor comprises a radar sensor that is configured to detect gestures.
7 . The system as claimed in claim 1 , wherein the long-range detector and authenticator comprises at least one radio-frequency system that is configured to transmit an ultra-high frequency radio-frequency signal with a carrier frequency higher than 2 GHZ.
8 . A method for waking-up the intention sensor, implemented within the system as claimed in claim 1 , the method comprising: implemented from an initial state of the system in which each one from among the medium-range detector and the intention sensor is in the standby state:
using the long-range detector and authenticator to monitor an environment of the vehicle in order to detect the arrival of an authenticated user within the wide perimeter;
when the arrival of an authenticated user within the wide perimeter is detected, generating and sending control data to control the standby state or the active state of the medium-range detector;
receiving, by the medium-range detector, control data for controlling its to control the standby state or the active state of the medium-range detector, and, in response, switching the medium-range detector from the standby state of the medium-range detector to the active state of the medium-range detector;
using the medium-range detector to successively measure a current distance between the medium-range detector and the portable user authentication device, in order to detect the arrival of a user within a restricted perimeter;
when the arrival of the user within the restricted perimeter is detected, generating and sending the control data to control the standby state or the active state of the intention sensor; and
receiving, by the intention sensor said control data to control the standby state or the active state of the intention sensor, and, in response, switching the intention sensor from the standby state to the active state of the intention sensor.