Hands-free vehicle access and automatic start ID

Abstract

The invention relates to a hands-free access and automatic start identifier (1) for a vehicle (2), said identifier (1) comprising: - a battery (10), - an electronic module (11) for performing an operation (Fct) after the identifier (1) has been located relative to the vehicle (2), - said BLE component (12) configured to connect to the vehicle (2), - said locating component (13) configured to locate said identifier (1) relative to the vehicle (2), characterized in that said identifier (1) further comprises: - a step detector (14) configured to detect walking (a1) or running (a2) by a person carrying the identifier (1), and if walking (a1) or running (a2) is detected, to wake up said electronic module (11) so that it activates said BLE component (12) and said locating component (13). Figure for the abstract: Figure 1

Description

Title of the invention: Hands-free access and automatic start identifier for vehicle

[0001] The present invention relates to a hands-free access and automatic start identifier for a vehicle. The invention also relates to a hands-free access and automatic start method for a vehicle. The invention finds a particular but non-limiting application in motor vehicles.

[0002] In the field of motor vehicles, a hands-free access and automatic start identifier known to those skilled in the art comprises: - a battery, - an electronic module configured to perform an operation after locating said identifier in relation to the vehicle, - a BLE component configured to connect to the vehicle upon detection of movement of the identifier, - a location component configured to locate said identifier relative to the vehicle, - a motion detector configured to detect any movement of the identifier originating from a movement of the hand carrying the identifier or originating from a container such as a bag which moves in which the identifier is located.

[0003] A disadvantage of this state of the art is that the use of BLE technology and localization consume a lot of energy and the battery of the identifier is discharged in less than a year. However, according to a request from the manufacturers, the battery of the identifier must last approximately two years.

[0004] In this context, the present invention aims to propose a hands-free access and automatic start identifier for a vehicle which makes it possible to solve the mentioned drawback.

[0005] To this end, the invention proposes a hands-free access and automatic start identifier for a vehicle, said identifier comprising: - a battery, - an electronic module for performing an operation after locating said identifier in relation to the vehicle, - said BLE component configured to connect to the vehicle, - said location component configured to locate said identifier relative to the vehicle, characterized in that said identifier further comprises: - a step detector configured to detect walking or running of a person carrying the identifier, and if there is a detection of walking or running to wake up said electronic module so that it activates said BLE component and said location component.

[0006] Thus, as will be seen in detail later, the fact of activating the BLE component and the location component only during a movement corresponding to walking or running by a person carrying the identifier makes it possible to avoid activating them during any other movement (for example when the person does not move but moves their hand, or is seated and moves while remaining seated, etc.). This reduces the energy consumed by the BLE component and the location component, and consequently saves the battery.

[0007] According to non-limiting embodiments, said hands-free access and automatic start identifier for a vehicle may further comprise one or more additional characteristics taken alone or in all technically possible combinations, among the following.

[0008] According to a non-limiting embodiment, said location component is a UWB component.

[0009] According to a non-limiting embodiment, said BLE component and said location component are combined.

[0010] According to a non-limiting embodiment, after a connection to the vehicle, when the electronic module activates said BLE component, the latter goes into a scanning mode or into a broadcasting mode.

[0011] According to a non-limiting embodiment, said electronic module is configured to transmit to the vehicle a request for authorization to put the identifier into standby mode.

[0012] According to a non-limiting embodiment, when the step detector detects a stop in walking or running, said electronic module is configured to switch to standby mode and to put said BLE component and said location component into standby mode.

[0013] According to a non-limiting embodiment, said step detector is composed of the electronic module and a motion detector which is configured to transmit acceleration signals to the electronic module, and said electronic module is configured to perform digital processing to evaluate whether said acceleration signals correspond to walking or running.

[0014] According to a non-limiting embodiment, said electronic module is configured to switch to standby mode periodically after being woken up.

[0015] According to a non-limiting embodiment, said electronic module is independent of the step detector which is configured to transmit to the electronic module an interruption relating to walking or running.

[0016] According to a non-limiting embodiment, said step detector is configured to detect the stopping of said walking or said running.

[0017] According to a non-limiting embodiment, the electronic module integrates said BLE component.

[0018] There is further provided a method for hands-free access and automatic starting of a vehicle by means of an identifier comprising an electronic module, a BLE component, a location component and a step detector, characterized in that said method comprises: - detection by said step detector of a walk or run by a person carrying said identifier, - an alarm clock of said electronic module, - activation by said electronic module of said BLE component, - a connection by said BLE component to said vehicle, - activation by said electronic module of said location component, - a location by said location component of said identifier in relation to said vehicle, - execution by said electronic module of an operation depending on said location.

[0019] According to a non-limiting embodiment, the waking up of said electronic module is carried out by transmitting to it an interruption relating to a walk or a run.

[0020] According to a non-limiting embodiment, the waking up of said electronic module is carried out by transmitting an acceleration signal to it.

[0021] According to a non-limiting embodiment, said electronic module is part of said step detector which further comprises a motion detector and said acceleration signal is transmitted by said motion detector.

[0022] According to a non-limiting embodiment, when said electronic module activates said BLE component, the latter goes into scanning mode or broadcasting mode.

[0023] According to a non-limiting embodiment, said electronic module is independent of said step detector and said interruption is transmitted by said step detector.

[0024] The invention and its various applications will be better understood upon reading the following description and examining the accompanying figures:

[0025] [Fig.l] is a diagram of a hands-free access and automatic start identifier for a vehicle according to a first non-limiting embodiment of the invention, said identifier comprising a battery, an electronic module, a BLE component, a location component, and a step detector,

[0026] [Fig.2] is a diagram of a hands-free access and automatic start identifier for a vehicle according to a second non-limiting embodiment of the invention, said identifier comprising a battery, a location component, a BLE component, and a step detector integrating an electronic module and a motion detector,

[0027] [Fig.3] illustrates a diagram of a hands-free access and automatic starting method for a vehicle according to a first non-limiting embodiment of the invention,

[0028] [Fig.4] illustrates a diagram of a hands-free access and automatic starting method for a vehicle according to a second non-limiting embodiment of the invention.

[0029] Identical elements, by structure or by function, appearing in different figures retain, unless otherwise specified, the same references.

[0030] The identifier 1 according to the invention is described with reference to figures 1 and 2.

[0031] Identifier 1 is a hands-free access and auto-start identifier for a vehicle 2 (illustrated in figures 1 and 2). In a non-limiting embodiment, the vehicle 2 is a motor vehicle. In non-limiting variant embodiments, the vehicle 2 is a vehicle with a thermal engine, an electric motor or a hybrid vehicle. The hands-free access and automatic start function is called in English “Passive Entry - Passive Start” and referenced PEPS in figures 1 and 2.

[0032] As illustrated in Figures 1 and 2, identifier 1 comprises: - a 10 battery, - an electronic module 11, - a BLE 12 component, BLE being the abbreviation for “Bluetooth Low Energy” in English, - a localization component 13, - a step detector 14.

[0033] In a non-limiting embodiment, the identifier 1 is configured to also perform a remote access function, called in English “Remote Keyless Entry” and referenced RKE in Figures 1 and 2. For this purpose, in a non-limiting embodiment, the identifier 1 further comprises push buttons 15 and 17 (illustrated in Figures 1 and 2) to perform the RKE remote access function. In a non-limiting example, the push button 15 performs remote opening and the push button 17 performs remote closing.

[0034] In a non-limiting embodiment, the battery 10 is a button cell. In a non-limiting example, the battery 10 has a capacity of 620 milliamp hours. In a non-limiting example, the button cell provides a power supply of 3 Volts.

[0035] The electronic module 11 is configured to be in active ON mode or in standby SLP mode.

[0036] The electronic module 11 is configured to: - activate the BLE component 12 (function illustrated f 10(11, 12, ON)), - activate the location component 13 after connection to the vehicle 2 (function illustrated fl 1(11, 13, ON)).

[0037] In a non-limiting embodiment illustrated in Figures 1 and 2, the electronic module 11 and the BLE component 12 are independent of each other. In another non-limiting embodiment not illustrated, the electronic module 11 integrates the BLE component 12.

[0038] In a first non-limiting embodiment illustrated in [Fig.l], the electronic module 11 and the step detector 14 are independent of each other. In this case, the step detector 14 is a pedometer. The electronic module 11 is not part of the step detector 14. In this case, the electronic module 11 is further configured to receive from the step detector 14 an interruption itl relating to a walk al or a run a2 (illustrated function f 14(11, 14, itl(al,a2)) in [Fig.l]). This interruption itl makes it possible to wake up the electronic module 11. It will be noted that in the context of an experiment it was found that this case consumes approximately 2.6 milliamp hours over 2 years.

[0039] In a second non-limiting embodiment illustrated in [Fig.2], the electronic module 11 is part of the step detector 14. In this case, the step detector 14 further comprises a motion detector (such as an accelerometer) 16 and the electronic module 11 is configured to: - receive acceleration signals sxyz from the motion detector 16 (illustrated function f 15(11, 16, sxyz(al,a2)) in [Fig.2]), and - perform digital processing on these acceleration signals sxyz to evaluate whether they correspond to a walk al or a run a2 (function illustrated f 16(11, sxyz (al,a2)) in [Fig.2]).

[0040] The first acceleration signal sxyz wakes up the electronic module 11. It should be noted that in the context of an experiment it was found that this case consumes approximately 108 milliampere hours over 2 years.

[0041] In a non-limiting exemplary embodiment, a step al corresponds to acceleration signals sxyz which are peaks spaced 200 milliseconds apart with an amplitude of 350 mg (milli gauss). In a non-limiting exemplary embodiment, a stroke a2 corresponds to acceleration signals sxyz which are peaks of 100 milliseconds with an amplitude of 500 mg (milli gauss).

[0042] In this second non-limiting embodiment, in a non-limiting variant embodiment, the electronic module 11 is further configured to return to SLP standby mode (after having been activated) and this periodically (function illustrated f 17(11, SLP / ON) in [Fig.2]). This makes it possible to reduce its power consumption. The electronic module 11 thus alternates between the activated ON mode and the SLP standby mode. In a non-limiting embodiment, it is in SLP standby mode for a duration of approximately 250 milliseconds and every second. It will be noted that the electronic module 11 consumes more than the BLE component 12, and the location component 13 when it is a UWB component consumes more than the electronic module 11 and the BLE component 12.

[0043] In a non-limiting embodiment, the electronic module 11 is further configured to send to the vehicle 2 an authorization request RqO to put the identifier 1 into standby mode (illustrated function f 12(11, 1, RqO, OFF)). The standby mode of the identifier 1 means that the electronic module 11 as well as the BLE component 12 and the location component 13 are in standby mode SLP.

[0044] The electronic module 11 is further configured to execute an operation Fct after locating the identifier 1 relative to the vehicle 2 (illustrated function f 13( 11, Fct). In non-limiting embodiments, the operation Fct is selected from: - a welcome light signature, called in English “Welcome”, - automatic unlocking of the doors of vehicle 2, - automatic starting of vehicle 2, - locking the vehicle doors 2.

[0045] As illustrated in Figures 1 and 2, the BLE component 12 is configured to: - connect to the vehicle 2 (illustrated function f21(12, 2, Cnt)), - put itself in SCN scanning mode (illustrated function f22(12, SCN)) or in ADV broadcast mode (illustrated function f23(12, ADV)) after a connection to the vehicle 2. For this purpose, it comprises one or more BLE transmitting / receiving antennas referenced 120.

[0046] The SCN scanning mode is called in English “scanning mode”. The ADV broadcasting mode is called in English “advertising mode”. These terms are subsequently used interchangeably with the terms SCN scanning mode and ADV broadcasting mode respectively.

[0047] It should be noted that the mode is chosen according to the customer's request, namely here the car manufacturer.

[0048] In SCN scanning mode, the BLE component of identifier 1 periodically scans a BLE signal transmitted by vehicle 2, and identifier 1 connects to vehicle 2 when BLE component 12 receives this BLE signal. In ADV broadcast mode, the BLE component of identifier 1 periodically transmits a BLE signal and vehicle 2 connects to identifier 1 when it receives this BLE signal. Note that identifier 1 connects via its BLE component to vehicle 2 if it is within the BLE range distance. It is recalled that the range distance is between 40 meters and 100 meters.

[0049] In a non-limiting embodiment, the BLE component 12 is further configured to go into SLP standby mode upon request from the electronic module 11 (function illustrated f24(12, 11, SLP) in FIGS. 1 and 2).

[0050] In a non-limiting embodiment illustrated in Figures 1 and 2, the BLE component 12 is integrated into the electronic module IL. In another non-limiting embodiment, the BLE component 12 is independent of the electronic module IL.

[0051] As illustrated in Figures 1 and 2, the location component 13 is configured to locate the identifier 1 relative to the vehicle 2 (illustrated function f31(13, 1, 2, pos)). For this purpose, it comprises one or more UWB transmitting / receiving antennas referenced 130.

[0052] In a non-limiting embodiment, the location component 13 is a UWB component which is the abbreviation for “Ultra Wide Band” in English. A UWB location is located at a distance of less than 10 meters from the vehicle 2. Since location via a UWB component is known to those skilled in the art, it is not described here.

[0053] In a first non-limiting embodiment, the location component 13 is a component independent of the BLE component.

[0054] In a second non-limiting embodiment, the location component 13 and the BLE component 12 are combined. In this case, the location component 13 is a BLE component with a location function. Since location via a BLE component is known to those skilled in the art, it is not described here. Such location via a BLE component is called “channel sounding” or “High Accuracy Distance Measurement” in English.

[0055] In a non-limiting embodiment, the location component 13 is further configured to go into SLP standby mode upon request from the electronic module 11 (function illustrated f32(13, 11, SLP) in FIGS. 1 and 2).

[0056] The step detector 14 is configured to: - detect a walk al or a run a2 of a person carrying the identifier 1 (illustrated function f41(14, al, a2)), - if a walk al or a run a2 is detected, wake up the electronic module 11 so that it activates the BLE component 12 and the location component 13 (illustrated function f42(14, 11, ON)).

[0057] In a first non-limiting embodiment illustrated in [Fig.l], the step detector 14 is independent of the electronic module 11, namely it does not integrate the electronic module 11. In this case, the step detector 14 is configured to transmit to the electronic module 11 the interruption itl relating to a step al or a stroke a2 (illustrated function f43(14, 11, itl(al,a2)) in [Fig.l]).

[0058] In a non-limiting example, the step detector 14 is a pedometer.

[0059] In a second non-limiting embodiment illustrated in [Fig. 2], the step detector 14 comprises the electronic module 11 and a motion detector 16. In a non-limiting example, the motion detector 16 is an accelerometer. In this case, the motion detector 16 is further configured to transmit the acceleration signals sxyz to the electronic module 11 (illustrated function f44(16, 11, sxyz (a1, a2)).

[0060] [Fig. 3] illustrates a non-limiting embodiment of a method 3 for hands-free access and automatic starting of a vehicle 2 by means of the identifier 1 described previously, when the identifier 1 is configured to be in SCN “scanning” mode. It will be noted that when the BLE component of the identifier 1 is configured to be in SCN “scanning” mode, the vehicle 2 is configured to be in ADV “advertising” mode. In this illustrated non-limiting embodiment, the electronic module 11, the BLE component 12 and the step detector 14 are independent of each other.

[0061] Method 3 comprises the following steps.

[0062] Initially, the step detector 14 is mainly always activated: it is in an active ON mode. Initially, the electronic module 11, the BLE component 12 and the location component 13 are in SLP standby mode.

[0063] In a step El 1 illustrated Fl 1(14, al, a2), the step detector 14 detects a step al or a stroke a2.

[0064] In a step E12 illustrated F12(14, 11, ON, itl), when the step detector 14 detects a step al or a run a2, it wakes up the electronic module 11 by sending an interrupt itl relating to what it has detected: a step al or a run a2. The latter is woken up and thus goes into an active ON mode. It will be noted that there is no verification to know if the identifier 1 is approaching the vehicle 2. It will be noted that the operation of a step detector 14 (such as a pedometer) being known to those skilled in the art, it is not described here.

[0065] In a step E13 illustrated F13(1 1, 12, ON), the electronic module 11 activates the BLE component 12 and the latter then goes into “scanning” mode SCN according to its initial configuration. It thus goes into reception mode to receive a BLE signal which is an ADV frame.

[0066] Upon receipt of an ADV frame, when the identifier 1 has identified the vehicle 2, in a step E14 illustrated F14(12, 2, Rql), the BLE component 12 transmits a BLE connection request Rql to the vehicle 2 and in a step E15 illustrated F 15(12, 2, Cnt) connects to the vehicle 2 after authorization from the vehicle 2. The identification of a vehicle 2 via an ADV frame and the connection of a BLE component to a vehicle 2 being known to those skilled in the art, they are not described here. The BLE connection makes it possible to open a communication session between the BLE component 12 and the vehicle 2 when identifier 1 is within the UWB range area. In a non-limiting embodiment, identifier 1 measures the power of the BLE signal received from vehicle 2 to determine whether it is within the UWB range area. In a non-limiting embodiment, the communication session is a UWB communication session. Note that to have UWB communication, a BLE connection is required beforehand.

[0067] Once the BLE connection is established, in a step E16 illustrated F16(11, 13, ON), the electronic module 11 activates the location component 13 which goes into active ON mode, and transmits to it a location request Rq2 (step E17 illustrated F17(11, 13, Rq2)). Thus, upon request, the latter locates the identifier 1 around the vehicle 2 (step E18 illustrated F18(13, 1, pos)) and transmits in a step E19 illustrated F19(13, 11, pos), the location Pos of the identifier 1 to the electronic module 11 which receives it in a step E19' illustrated F19'(11, 13, pos). In a non-limiting embodiment, the location is done in UWB. Such location being known to those skilled in the art, it is not described here.

[0068] Depending on the location of the identifier 1, in a step E20 illustrated F20(1 1, Fct) the electronic module 11 executes an operation Fct of the vehicle 2 among the non-limiting operations Fct described previously.

[0069] In non-limiting examples: - the welcome light signature is produced when identifier 1 is in an access zone around 5 to 6 meters from vehicle 2, - the doors of vehicle 2 are opened when identifier 1 is in an access zone around 1.5 meters from vehicle 2, - automatic starting of vehicle 2 is carried out when identifier 1 is in the passenger compartment of vehicle 2, - the doors of vehicle 2 are locked when identifier 1 moves away from vehicle 2 and is located within an access zone of 2 meters around vehicle 2.

[0070] If the step detector 14 detects the stopping of walking al or running a2 (step E21 illustrated F21(14, al / a2, OFF), in a step E22 illustrated F22(14, 11, al / a2, OFF) it transmits this information that walking al or running a2 has stopped to the electronic module 11. It will be noted that the operation of a step detector 14 (such as a pedometer) being known to those skilled in the art, it is not described here.

[0071] In a step E23 illustrated F23(l 1, SLP), the electronic module 11 goes into SLP standby mode and in a step E25 illustrated F25(l 1, 12, 13, SLP) puts the BLE component 12 and the location component 13 into SLP standby mode: the identifier 1 is in standby (apart from its step detector 14). Thus, only the step detector 14 remains activated. The vehicle 2 remains in an ADV “advertising” mode. The electronic module 11, the BLE component 12 and the location component 13 will be activated again if a walk al or a run a2 is detected again or if a person presses one of the push buttons 15 or 17 described above.

[0072] In a non-limiting embodiment, prior to placing the identifier 1 on standby, in a step E22' illustrated F22'(ll, 2, RqO), the electronic module 11 transmits to the vehicle 2 an authorization request RqO to place the identifier 1 on standby. Indeed, in the following non-limiting cases the vehicle 2 will not necessarily authorize the placing of the identifier 1 on standby: - if vehicle 2 is moving, - if vehicle 2 is stationary but the engine is not off, and identifier 1 needs to be located, - if the engine of vehicle 2 is off but identifier 1 must be detected to restart the engine, - if you want to turn off the engine (via the ignition key or a button) but you have to detect the presence of identifier 1 to do so.

[0073] Thus, by not putting the electronic module 11, the BLE component 12 or the location component 11 into SLP standby mode, less time is lost in carrying out the operations described above.

[0074] Upon receipt of the authorization request RqO (step E22” illustrated F22”(11, 12, RqO, OK)), if it is positive, then the electronic module 11 puts identifier 1 on standby. Otherwise, it does not put identifier 1 on standby: all elements 11, 12 and 13 remain activated.

[0075] [Fig. 4] illustrates a method 3 for hands-free access and automatic starting of a vehicle 2 by means of the identifier 1 described previously, when the identifier 1 is configured to be in “advertising mode” ADV. In this case, the vehicle 2 must be configured in “scanning” mode SCN and must always integrate the “advertising” mode ADV to detect mobile phones which are themselves always in “scanning” mode SCN. Consequently, the vehicle 2 alternates between the two modes “advertising” ADV and “scanning” SCN. In this non-limiting embodiment illustrated, the electronic module 11, the BLE component 12 and the step detector 14 are independent of each other.

[0076] Method 3 comprises the following steps.

[0077] Initially, the step detector 14 is activated: it is in an active ON mode. Initially, the electronic module 11, the BLE component 12 and the location component 13 are in SLP standby mode.

[0078] In a step E31 illustrated F31(14, al, a2), the step detector 14 detects a step al or a stroke a2.

[0079] In a step E32 illustrated F32(14, 11, ON, itl), when the step detector 14 detects a step al or a run a2, it wakes up the electronic module 11 by sending an interrupt itl relating to what it has detected: a step or a run. The latter is woken up and thus goes into an active ON mode. Note that there is no check to see if identifier 1 is approaching vehicle 2.

[0080] In a step E33 illustrated F33(1 1, 12, ON), the electronic module 11 activates the BLE component 12 and the latter then goes into ADV “advertising” mode according to its initial configuration. It thus sends BLE signals which are ADV frames.

[0081] Upon receipt of an ADV frame, the vehicle 2 identifies the identifier 1 and in a step E34 illustrated F34(2, 12, Rql'), the vehicle 2 makes a connection request Rql' to the BLE component 12 and in a step E35 illustrated F35(2, 12, Cnt) connects to the BLE component 12 after having verified that the identifier 1 belongs to the vehicle 2. Such a verification being known to those skilled in the art, it is not described here. The identification of an identifier 1 via an ADV frame and the connection of a vehicle 2 to a BLE component being known to those skilled in the art, they are not described here. The BLE connection makes it possible to open a communication session between the BLE component 12 and the vehicle 2. In a non-limiting embodiment, the communication session is opened according to the UWB communication protocol.

[0082] The following steps E36 to 44 illustrated are respectively the same as steps E16 to E24 described in the first non-limiting embodiment of [Fig.3].

[0083] It will be noted that the method 3 has been described when the electronic module 11 is not part of the step detector 14. But, of course, the same steps apply when the step detector 14 comprises the electronic module 11 and a motion detector 16, apart from the steps of exchanging an interruption itl and waking up the electronic module by this interruption itl which are replaced by steps of exchanging acceleration signals sxyz and waking up the electronic module 11 by a first acceleration signal sxyz as described previously.

[0084] Of course, the description of the invention is not limited to the application or embodiments described above and to the field described above.

[0085] Thus, the invention described presents in particular the following advantages: - it allows to increase the life of the battery 10 compared to the prior art where the BLE component is activated on any movement even if the person is not walking or running.

Claims

Claims

1. Hands-free access and automatic start identifier (1) for a vehicle (2), said identifier (1) comprising: - a battery (10), - an electronic module (11) for executing an operation (Fct) after locating said identifier (1) relative to the vehicle (2), - a BLE component (12) configured to connect to the vehicle (2), - a location component (13) configured to locate said identifier (1) relative to the vehicle (2), characterized in that said identifier (1) further comprises: - a step detector (14) configured to detect a walk (al) or a run (a2) of a person carrying the identifier (1), and if there is a detection of a walk (al) or a run (a2) to wake up said electronic module (11) so that it activates said BLE component (12) and said location component (13).

2. Identifier (1) according to claim 1, wherein said location component (13) is a UWB component.

3. Identifier (1) according to claim 1, wherein said BLE component (12) and said location component (13) are merged.

4. Identifier (1) according to any one of the preceding claims, wherein after a connection to the vehicle (2), when the electronic module (11) activates said BLE component, the latter goes into a scanning mode (SCN) or into a broadcast mode (ADV).

5. Identifier (1) according to any one of the preceding claims, wherein said electronic module (11) is configured to transmit to the vehicle (2) an authorization request (RqO) to put the identifier (1) into standby mode (SLP).

6. Identifier (1) according to any one of the preceding claims, wherein the step detector (14) detects a stop of walking (al) or running (a2), said electronic module (11) is configured to switch to sleep mode (SLP) and to put said BLE component (12) and said location component (13) into sleep mode (SLP).

7. Identifier (1) according to any one of the preceding claims, wherein said step detector (14) is composed of the electronic module (11) and a motion detector (16) which is configured to transmit to the electronic module (11) acceleration signals (sxyz), and said electronic module (11) is configured to perform a digital processing to evaluate whether said acceleration signals (sxyz) correspond to walking (al) or running (a2).

8. Identifier (1) according to the preceding claim, wherein said electronic module (11) is configured to switch to sleep mode (SLP) periodically after being woken up.

9. Identifier (1) according to any one of the preceding claims 1 to 6, wherein said electronic module (11) is independent of the step detector (14) which is configured to transmit to the electronic module (11) an interruption (itl) relating to a walk (al) or a run (a2).

10. Method (3) for hands-free access and automatic starting of a vehicle (2) by means of an identifier (1) comprising an electronic module (11), a BLE component (12), a location component (13) and a step detector (14), characterized in that said method (3) comprises: - a detection by said step detector (14) of a walk (al) or a run (a2) of a person carrying said identifier (1), - a waking up of said electronic module (11), - an activation by said electronic module (11) of said BLE component (12), - a connection by said BLE component (12) to said vehicle (2), - an activation by said electronic module (11) of said location component (13), - a location by said location component (13) of said identifier (1) relative to said vehicle (2), - an execution by said electronic module (11) of an operation (Fct) as a function of said location.

11. Method (3) according to claim 10, wherein the waking up of said electronic module (11) is carried out by transmitting to it an acceleration signal (Sxyz)-

12. Method (3) according to claim 10, in which the waking up of said electronic module (11) is carried out by transmitting to it an interruption (itl) relating to a step (al) or a race (a2).

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