Method and device for controlling the position of a head restraint in a vehicle.

Abstract

The present invention relates to a method and a device for controlling the position of a headrest (121) in a vehicle (10). Indeed, the method comprises receiving first data representative of morphological characteristics of a user (100) of the vehicle acquired for example by an on-board camera or a sensor integrated in the headrest, determining a position of the headrest as a function of the first data and controlling at least one actuator configured to position the headrest in the previously determined position. Figure for abstract: Figure 2

Description

Title of the invention: Method and device for controlling the position of a head restraint in a vehicle. Technical field

[0001] The present invention relates to methods and devices for controlling the position of a head restraint in a vehicle, in particular a motor vehicle. The present invention also relates to a method and a device for adjusting an element of a vehicle seat. Technological background

[0002] A vehicle seat has numerous adjustments in order to adapt to the size or morphology of a user of this seat. For example, it is possible to move the seat base forward or backward, to tilt the backrest, or to adjust the height of a headrest via manual or electric controls.

[0003] In the event of a non-optimal seat adjustment, a user is then poorly installed, which presents numerous risks. A first risk is of the order of discomfort, the position of the user being for example not natural, the latter may experience pain during a journey in the vehicle. A second risk is of the medical order, poor installation being able to cause, after numerous journeys, for example, musculoskeletal disorders, all the more significant if the user uses the vehicle very frequently. Finally, a third risk is of a safety order, a poorly installed user not having, for example, an optimal field of vision when driving the vehicle.

[0004] Poor adjustment frequently occurs, particularly when many users with different body shapes are in a vehicle. It is then not easy to find an optimal adjustment and some users sometimes skip the step of adjusting the position of their seat. Summary of the present invention

[0005] An object of the present invention is to solve at least one of the drawbacks of the technological background.

[0006] Another object of the present invention is to improve the adjustment of a seat or headrest of a vehicle.

[0007] According to a first aspect, the present invention relates to a method for controlling the position of a head restraint in a vehicle, the method comprising the following steps: - reception of first data representative of morphological characteristics of a vehicle user; - determining a position of the head restraint based on the first data; - controlling at least one actuator configured to position the head restraint in the position.

[0008] According to a variant of the method, the first data are received from a camera on board the vehicle.

[0009] According to another variant of the method, the first data are received from at least one sensor embedded in the headrest.

[0010] According to an additional variant, the method further comprises sending second data to a first remote server, the second data being associated with a blockchain and representative of a first user profile, the second data comprising the first data.

[0011] The use of a blockchain for storing and processing data received from vehicles ensures the security and confidentiality of the data collected and of the data resulting from the processing of the collected data. The blockchain makes it possible, for example, to trace data, from its collection to its use.

[0012] According to another variant, the method further comprises a step of receiving, from a second remote server, third data representative of a second user profile, the determination step furthermore being a function of the second user profile.

[0013] According to another variant, the first data belong to a set of data comprising data associated with: - a position and / or a neck height, - a head height and / or a distance between the head and the headrest, - a gender, and - a type of hairstyle.

[0014] According to an additional variant, the position is determined from a digital model, the digital model having been learned during a learning phase from fourth data representative of morphological characteristics of a set of users.

[0015] According to a second aspect, the present invention relates to a device for controlling the position of a head restraint in a vehicle, the device comprising a memory associated with a processor configured for implementing the steps of the method according to the first aspect of the present invention.

[0016] According to a third aspect, the present invention relates to a system for controlling the position of a head restraint in a vehicle comprising a device as described above according to the second aspect of the present invention and at least one vehicle connected in wireless communication to the device as described above according to the second aspect of the present invention.

[0017] According to a fourth aspect, the present invention relates to a computer program which comprises instructions adapted for executing the steps of the method according to the first aspect of the present invention, in particular when the computer program is executed by at least one processor.

[0018] Such a computer program may use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any other desirable form.

[0019] According to a fifth aspect, the present invention relates to a computer-readable recording medium on which is recorded a computer program comprising instructions for carrying out the steps of the method according to the first aspect of the present invention.

[0020] On the one hand, the recording medium may be any entity or device capable of storing the program. For example, the medium may comprise a storage means, such as a ROM memory, a CD-ROM or a microelectronic circuit type ROM memory, or a magnetic recording means or a hard disk.

[0021] Furthermore, this recording medium may also be a transmissible medium such as an electrical or optical signal, such a signal being able to be conveyed via an electrical or optical cable, by conventional or hertzian radio or by self-directed laser beam or by other means. The computer program according to the present invention may in particular be downloaded from an Internet-type network.

[0022] Alternatively, the recording medium may be an integrated circuit in which the computer program is incorporated, the integrated circuit being adapted to perform or to be used in performing the method in question. Brief description of the figures

[0023] Other characteristics and advantages of the present invention will emerge from the description of the particular and non-limiting exemplary embodiments of the present invention below, with reference to the appended figures 1 to 4, in which:

[0024] [Fig-1] schematically illustrates a passenger compartment of a vehicle, according to an example of particular and non-limiting embodiment of the present invention;

[0025] [Fig.2] schematically illustrates a user installed in a seat of the vehicle of [Fig.l], according to a particular and non-limiting exemplary embodiment of the present invention;

[0026] [Fig.3] illustrates a flowchart of the different steps of a method for controlling the position of a head restraint in the vehicle of [Fig.l], according to an example of rea- particular and non-limiting use of the present invention; and

[0027] [Fig.4] schematically illustrates a device configured to control the position of a head restraint in the vehicle of [Fig.l], according to a particular and non-limiting exemplary embodiment of the present invention. Description of examples of implementation

[0028] A method and a device for controlling the position of a head restraint in a vehicle will now be described in the following with joint reference to Figures 1 to 4. The same elements are identified with the same reference signs throughout the description which follows.

[0029] The terms "first(s)", "second(s)" (or "first(s)", "second(s)"), etc. are used in this document by arbitrary convention to enable different elements (such as operations, means, etc.) implemented in the embodiments described below to be identified and distinguished. Such elements may be distinct or correspond to a single element, depending on the embodiment.

[0030] According to a particular and non-limiting example of embodiment of the present invention, a method and a device for controlling the position of a headrest in a vehicle. Indeed, the method comprises the reception of first data representative of morphological characteristics of a user of the vehicle acquired for example by an on-board camera or a sensor integrated in the headrest, the determination of a position of the headrest as a function of the first data and the control of at least one actuator configured to position the headrest in the previously determined position.

[0031] Such a method or device makes it possible to perfectly adjust the position of a headrest according to the morphology of a user, thus improving the comfort, health and / or safety of this user.

[0032] [Fig. 1] schematically illustrates a passenger compartment of a vehicle 10, according to a particular and non-limiting exemplary embodiment of the present invention.

[0033] The vehicle 10 corresponds for example to a vehicle with a thermal engine, with electric motor(s) or even a hybrid vehicle with a thermal engine and one or more electric motors. The vehicle 10 thus corresponds for example to a land vehicle, for example an automobile, a truck, a bus.

[0034] According to a particular embodiment, the vehicle 10 advantageously carries a communication system configured to communicate with one or more remote devices via an infrastructure of a wireless communication network. The remote device advantageously corresponds to a device configured to host data, for example data stored in the memory of the remote device, for example data received from one or more data processing devices of the computer or server type and / or data received from a set of vehicles, including for example the vehicle 10, and / or data received from one or more mobile communication devices (for example a smartphone or a tablet). Each remote device corresponds for example to a server in the “cloud”, also called a “node” of the network.

[0035] The data processing device(s) correspond(s) for example to devices controlled by a vehicle manufacturer, advantageously the manufacturer of the vehicles in the set of vehicles. This or these devices are for example configured to process and analyze data received from the set of vehicles and / or data received from the mobile communication device(s). This or these mobile communication device(s) are for example associated with the owners or drivers of the vehicles in the set of vehicles.

[0036] The data processing device(s) are for example connected in communication with the “cloud” via a wired connection (for example according to Ethernet and / or via a fiber optic connection) and / or via a wireless connection of the Wifi® type (according to IEEE 802.11 or one of the variations of IEEE 802.11 or via a wireless connection of the 4G or 5G cellular network type).

[0037] Each device is thus configured to transmit data to the “cloud” and to receive data from the “cloud”.

[0038] The communication system of the vehicle 10 and / or of each vehicle of the set of vehicles comprises for example one or more communication antennas connected to a telematic control unit, called TCU (from the English "Telematic Control Unit"), itself connected to one or more computers of the on-board system of the vehicle 10 and / or of each vehicle of the set of vehicles. The antenna(s), the TCU unit and the computer(s) form for example a multiplexed architecture for the realization of different services useful for the proper functioning of the vehicle and for assisting the driver and / or the passengers of the vehicle in the control or maintenance of the vehicle 10 and / or of each vehicle of the set of vehicles, for example by displaying notifications relating to recall campaigns orchestrated by the device(s) via the "cloud" 100.The computer(s) and the TCU communicate and exchange data with each other via one or more computer buses, for example a communication bus of the data bus type CAN (from the English "Controller Area Network" or in French "Network of controllers"), CAN FD (from the English "Controller Area Network Flexible Data-Rate" or in French "Network of controllers with flexible data rate"), FlexRay (according to the ISO 17458 standard) or Ethernet (according to the ISO / IEC 802-3 standard).

[0039] The mobile communication infrastructure enabling wireless data communication between the vehicle 10 and / or each vehicle of the set of vehicles and the "cloud" and the remote device(s) hosted in the "cloud" includes, for example, one or more communication devices of the relay antenna (cellular network) or roadside unit type, known as UBR. In a communication mode using such a network architecture, data is, for example, received from the "cloud" or transmitted to the "cloud" by the vehicle 10 and / or each vehicle of the set of vehicles via one or more relay antennas (each relay antenna being, for example, connected to the "cloud" via a wired link).

[0040] The wireless communication system allowing the exchange of data between the vehicle 10 and / or each vehicle of the set of vehicles and the “cloud” corresponds for example to: - a vehicle-to-infrastructure (V2I) communication system, for example based on the 3GPP LTE-V or IEEE 802.1 Ip standards of ITS G5; or - a cellular network type communication system, for example an LTE (Long-Term Evolution), LTE-Advanced, LTE 4G or 5G type network; or - a Wi-Fi type communication system according to IEEE 802.11, for example according to IEEE 802.1 In or IEEE 802.1 lac.

[0041] For example, the vehicle 10 carries communication systems implementing wireless communication technologies grouped under the name V2X (from the English "Vehicle to Everything"). These technologies include in particular 1TTS G5 (from the English "Intelligent Transportation System G5" or in French "Système de transport intelligent G5") in Europe or DSRC (from the English "Dedicated Short Range Communications" or in French "Communications réservés à courte gamme") in the United States of America which are both based on the IEEE 802.1 Ip standard or even the technology based on cellular networks called C-V2X (from the English "Cellular - Vehicle to Everything" or in French "Cellulaire - Véhicule vers tout") which is based on 4G based on LTE (from the English "Long Term Evolution" or in French "Evolution à long terme") or 5G.

[0042] The passenger compartment of the vehicle 10 comprises one or more seats 12 and / or one or more benches. In the remainder of the description, the term “seat” refers indifferently to a seat or a bench. As illustrated in [Fig. 2], a seat 12 comprises for example several elements such as a seat 123, a backrest 122 and a headrest 121. These different elements are for example adjustable, manually or via an interface comprising buttons connected to electric or pneumatic actuators, pressing or acting on one of the buttons generating a movement of one of these elements. It is thus possible to move the seat 12 forward and backward, to tilt the seat and / or the backrest, to raise, approach and / or pivot the headrest.

[0043] The passenger compartment of the vehicle 10 comprises, for example, a central rearview mirror 13 or interior rearview mirror. This is, for example, equipped with a camera 11 oriented towards the passenger compartment so as to have in its field of vision 111 one or more passengers or users of the vehicle 10, for example the driver of the vehicle 10 seated on a driver's seat 12 and / or a front passenger of the vehicle 10. Such a camera makes it possible, for example, to observe the interior of the passenger compartment of the vehicle 10 to detect the presence of occupants, check that the seat belt is being worn or even analyze the driver's face in order to detect, for example, signs of fatigue. It should be noted that, according to other examples, the camera 11 is integrated into the dashboard or a ceiling light.

[0044] According to a particular exemplary embodiment, the passenger compartment of the vehicle 10 comprises a screen 14 and a computer configured to control the display of content(s) of a graphic Human Machine Interface, called HMI, on the screen 14. The computer corresponds for example to the computer of the infotainment system, called IVI computer (from the English “In-Vehicle Infotainment” or in French “Infodivertissement embargo”) of the vehicle.

[0045] The screen 14 is for example touch-sensitive and corresponds for example to a screen of the LCD type (from the English “Liquid Crystal Display” or in French “Display à cristals liquide”), for example of the TFT type (from the English “Thin-Film Transistor” or in French “Transistor en film mince”), or OLED type (from the English “Organic Light-Emitting Diode” or in French “Diode électroluminescente biologique”). The screen is for example arranged in the center of the dashboard, for example above a central facade. Of course, the position of the screen is not limited to this example, the screen being able to be arranged in any position, for example on the central facade.

[0046] The screen 14 makes it possible to display content intended for the driver and passengers of the vehicle. The screen is also configured to allow the driver and / or passengers of the vehicle to interact with one or more systems embedded in the vehicle via a human-machine interface (HMI) displayed on the screen 14. For example, the screen makes it possible to control the infotainment system, also called the IVI (In-Vehicle Infotainment) system of the vehicle, as well as, for example, the system responsible for controlling the position of a headrest of a seat of the vehicle 10, as described below.

[0047] A process for controlling the position of a headrest 121 in a vehicle 10, the method is for example implemented by an on-board computer of the vehicle 10.

[0048] In a first operation, first data representative of morphological characteristics of a user 100 of the vehicle 10 are received.

[0049] The morphological characteristics of a user 100 correspond for example to dimensional information such as: - a position h3 and / or a neck height h2, - a head height hl and / or a distance dl between the head and the headrest 121, - a gender, and - a type of hairstyle.

[0050] Thus, a first user presents for example the following morphological characteristics: hl = 20cm, h2 = 10cm and h3 = 60cm, dl = 15cm, woman, hair in a bun, while a second user presents the following morphological characteristics: hl = 22cm, h2 = 12cm and h3 = 67cm and dl = 9cm, man, bald.

[0051] According to a first particular exemplary embodiment, such characteristics are obtained from the on-board camera 11, an image acquired by this camera having been processed in order to determine these measurements and these attributes. The image processing is for example carried out with distance prediction and / or feature extraction models. These models use, for example, previously trained neural networks.

[0052] According to a second particular exemplary embodiment, the first data are received from at least one sensor embedded in the headrest 121. A sensor embedded in the headrest 121 corresponds for example to an optical distance sensor, for example of the infrared or laser type, or even to an ultrasonic sensor.

[0053] According to a third particular embodiment, the morphological characteristics are obtained both from a camera 11 and from sensors positioned in the seat 12, for example in the headrest 121. These sensors and this camera 11 are for example connected to the computer implementing this process, by direct or indirect wired connection.

[0054] According to a particular exemplary embodiment, the first data also comprises data representative of user preferences, the user 100 having for example entered preferences or made adjustments via the HMI using, for example, the screen 14.

[0055] According to yet another particular exemplary embodiment, the first data comprises data representative of an attitude of the user 100, for example with the aim of detecting signs of fatigue or signs of discomfort.

[0056] According to a particular exemplary embodiment, these first data are classified, in a second operation, according to typical user profiles 100a, 100b, 100c.

[0057] In a third optional operation, second data are sent to a first remote server, the second data being associated with a blockchain and representative of a first user profile, the second data comprising the first data. For example, these second data comprise the previously received morphological characteristics to which an identifier relating to the vehicle 10 and / or to the user 100 is added. These data make it possible, for example, to subsequently supply a second system for controlling a position of a headrest in a second vehicle when the user 100 occupies it, the second vehicle not having sensors or cameras such as those equipping the vehicle 10.

[0058] According to an alternative embodiment, the second transmitted data are time-stamped, that is to say that a time label (from the English "timestamp") is associated with all or part of the information transmitted to a data processing device. Such time information is for example associated with information by the system which generates or uses the information, such time information making it possible to know the time at which a parameter setting of a system was implemented or modified, the time or moment at which a parameter is associated, a route is taken, etc.

[0059] The collection of the second data is advantageously compliant with any legislation or regulation on data collection, for example European, for example the general data protection regulation, known as GDPR.

[0060] For this purpose, the consent of users is for example required before any collection by the data processing device. Consent is for example required by the display of a query to which the user responds, for example by a touch on a touch interface associated with the screen 14 on which the query is displayed.

[0061] The blockchain, also called distributed ledger technology, is a digital tool for storing and communicating data without a central control body. The blockchain is configured to allow users of the blockchain (in this case the vehicle 10 and each vehicle in the set of vehicles previously presented and the data processing device(s) and / or the mobile communication device(s)) connected in a network to share data directly, without an intermediary. A blockchain is a register or a large database which has the particularity of being shared simultaneously with all its users, all of whom are also holders of this register, and who also all have the capacity to write data therein, according to specific rules set by a computer protocol secured by means of cryptography.

[0062] In a blockchain, the identification of each party (for example the vehicle 10 or each vehicle of the set of vehicles and / or the device(s) and / or the mobile communication device(s)) is carried out by a crypto-process. chart.

[0063] Each transaction is sent to a network (also called a storage “node”) of remote devices or calculations (for example computers or servers) located in different locations, for example in the “cloud”. Each node hosts a copy of the database in which the history of the transactions carried out is recorded. All stakeholders (i.e. for example the vehicle10 or each vehicle of the set of vehicles and / or the device(s) and / or the mobile communication device(s)) can access it simultaneously.

[0064] The security system is based on a consensus mechanism of all nodes each time information or data is added. The data is decrypted and authenticated by data centers (also called "miners"). Each transaction thus validated is added to the database in the form of a block (of the blockchain) of encrypted data, a block being able to host several transactions.

[0065] Decentralization of security management prevents transaction tampering. Each new block added to the blockchain is linked to the previous one (except for the first block in the chain) and a copy of this new block is transmitted to all nodes in the network. The integration of blocks is chronological, indelible and tamper-proof.

[0066] Blockchain technology is known to those skilled in the art. For example, it is described in a summary report from the French National Assembly dated December 2018 and entitled “Report of the joint information mission on blockchain and its uses: a sovereignty issue”.

[0067] Terms relating to blockchain have also been standardized, notably in the following standards: ISO 22739:2020, ISO / TR 23244:2020, ISO / TR 23455:2019 and ISO / TR 23576:2020.

[0068] In a fourth optional operation, third data are received from a second remote server. These third data are representative of a second user profile, the determination operation being furthermore a function of the second user profile. The second remote server corresponds for example to the first remote server. The third data are for example extracted from the blockchain. They are for example representative of preferences or habits of the user 100 or morphological characteristics associated with the user 100 that the on-board system of the vehicle 10 is not able to detect or measure.

[0069] In a fifth operation, a position of the headrest 121 is determined based on the first data and, for example, from the third data if these have been received previously.

[0070] The position of the headrest 121 corresponds to an ideal position adapted to the morphology of the user 100 and for example to his attitude.

[0071] The position of the headrest 121 is for example determined from a digital model, the digital model having been learned during a learning phase from fourth data representative of morphological characteristics of a set of users. The set of users thus constitutes a panel of users whose morphological characteristics are representative of a real distribution of morphological characteristics. Each user of the set of users has for example made adjustments to seats and headrests thus making it possible to define the ideal position of each element constituting a seat, including the headrest. These data are then recorded and processed, so as to define a digital model capable of determining the ideal position offering for example maximum comfort to a user according to his own morphological characteristics.This digital model corresponds, for example, to simulation models or to lookup tables (in English “Lookup Table” or “LUT”).

[0072] Thus, the position of the headrest 121 is determined from the morphological characteristics previously received via the digital model.

[0073] The position of the headrest 121 is for example defined in the seat reference frame, or even associated with positions of different actuators.

[0074] In a sixth operation, at least one actuator configured to position the headrest 121 in the position is controlled. The control comprises, for example, sending signals or orders to the actuators of the seat 12 and / or the headrest 121 making it possible to position the headrest 121 in the previously determined position.

[0075] An actuator corresponds for example to a rotary motor or to a jack, electric or pneumatic. The command sent by the computer corresponds for example to a position order or to a forward order, the actuator being for example controlled and communicating with the computer implementing the process. For example, the computer sends an order representing a speed and a direction of rotation or movement to an actuator and receives signals representative of the current position of the actuator. Thus, by control, the actuator reaches the desired position corresponding to the position of the headrest 121 previously determined. The headrest 121 is thus placed in the ideal position for the user 100.

[0076] It should be noted that, according to a particular embodiment, the ideal position of a headrest, for example of a passenger, is defined as a function of his attitude. A headrest 121 of a passenger showing signs of fatigue will for example move into a position suitable for resting the head of the passenger user 100, the ideal position in this case being that allowing him to relax or unwind.

[0077] Thus, this process makes it possible to adapt the position of a user's headrest without the user needing to adjust it. This automatic adjustment then allows the user to benefit from maximum comfort and a driving position or ideal transportation. Recording your profile and preferences or habits also allows you to benefit from these settings or adjustments in other vehicles connected to the blockchain in which your data is recorded.

[0078] In addition, exploitation of the data recorded in the blockchain allows the vehicle manufacturer to develop new models or update its vehicles based on the morphological characteristics and preferences of the vehicle users of the vehicle set, thus improving the comfort, ergonomics and safety of new vehicles.

[0079] [Fig. 4] schematically illustrates a device 4 configured for controlling the position of a head restraint in a vehicle, for example in the vehicle 10, according to a particular and non-limiting exemplary embodiment of the present invention. The device 4 corresponds for example to a device on board a vehicle, for example a computer.

[0080] The device 4 is for example configured for the implementation of the operations described with regard to figures 1 and 2 and / or the steps of the method described with regard to [Fig.3]. Examples of such a device 4 include, but are not limited to, on-board electronic equipment such as an on-board computer of a vehicle, an electronic calculator such as an ECU (“Electronic Control Unit”), a smartphone, a tablet, a computer, a laptop, a server. The elements of the device 4, individually or in combination, can be integrated into a single integrated circuit, into several integrated circuits, and / or into discrete components. The device 4 can be produced in the form of electronic circuits or software (or computer) modules or even a combination of electronic circuits and software modules.

[0081] The device 4 comprises one (or more) processor(s) 40 configured to execute instructions for carrying out the steps of the method and / or for executing the instructions of the software(s) embedded in the device 4. The processor 40 may include integrated memory, an input / output interface, and various circuits known to those skilled in the art. The device 4 further comprises at least one memory 41 corresponding for example to a volatile and / or non-volatile memory and / or comprises a memory storage device which may comprise volatile and / or non-volatile memory, such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, flash, magnetic or optical disk.

[0082] The computer code of the embedded software(s) comprising the instructions to be loaded and executed by the processor is for example stored in the 4L memory.

[0083] According to various particular and non-limiting embodiments, the device 4 is coupled in communication with other similar devices or systems and / or with communication devices, for example a TCU (from the English "Telematic Control Unit" or in French "Telematic Control Unit"), for example via a communication bus or through dedicated input / output ports.

[0084] According to a particular and non-limiting exemplary embodiment, the device 4 comprises a block 42 of interface elements for communicating with external devices. The interface elements of the block 42 comprise one or more of the following interfaces: - RF radio frequency interface, for example Wi-Fi® type (according to IEEE 802.11), for example in the 2.4 or 5 GHz frequency bands, or Bluetooth® type (according to IEEE 802.15.1), in the 2.4 GHz frequency band, or Sigfox type using UBN (Ultra Narrow Band) radio technology, or LoRa in the 868 MHz frequency band, LTE (Long-Term Evolution), LTE-Advanced; - USB interface (from the English “Universal Serial Bus” or “Universal Serial Bus” in French); - HDMI interface (from the English “High Definition Multimedia Interface” or “High Definition Multimedia Interface” in French); - LIN interface (from the English “Local Interconnect Network”).

[0085] According to another particular and non-limiting exemplary embodiment, the device 4 comprises a communication interface 43 which makes it possible to establish communication with other devices (such as other computers of the on-board system) via a communication channel 430. The communication interface 43 corresponds for example to a transmitter configured to transmit and receive information and / or data via the communication channel 430. The communication interface 43 corresponds for example to a wired network of the CAN (from the English "Controller Area Network" or in French "Réseau de contrôles") type, CAN FD (from the English "Controller Area Network Flexible Data-Rate" or in French "Réseau de contrôles à débit de données flexible"), FlexRay (standardized by the ISO 17458 standard) or Ethernet (standardized by the ISO / IEC 802-3 standard).

[0086] According to a particular and non-limiting exemplary embodiment, the device 4 can provide output signals to one or more external devices, such as a display screen 440, 14, touch-sensitive or not, one or more speakers 450 and / or other peripherals 460 (projection system) via output interfaces 44, 45 and 46 respectively. According to a variant, one or other of the external devices is integrated into the device 4.

[0087] [Fig.3] illustrates a flowchart of the different stages of a control process of the position of a headrest in a vehicle, for example in the vehicle 10, according to a particular and non-limiting exemplary embodiment of the present invention. The method is for example implemented by a computer on board the vehicle 10.

[0088] In a first step 31, first data representative of morphological characteristics of a user (100) of the vehicle (10) are received.

[0089] In a second step 32, a position of the headrest is determined based on the first data.

[0090] In a third step 33, at least one actuator configured to position the headrest in said position is controlled.

[0091] According to a variant, the variants and examples of the operations described in relation to figures 1 and 2 apply to the steps of the method of [Fig.3].

Claims

Claims

1. Method for controlling the position of a headrest (121) in a vehicle (10), said method comprising the following steps: - receiving (31) first data representative of morphological characteristics of a user (100) of the vehicle (10); - determining (32) a position of said headrest as a function of said first data; - controlling (33) at least one actuator configured to position said headrest (121) in said position.

2. Method according to claim 1, wherein said first data is received from a camera (11) on board the vehicle (10).

3. Method according to claim 1 or 2, for which the first data is received from at least one sensor embedded in said headrest (121).

4. Method according to one of claims 1 to 3, further comprising sending second data to a first remote server, said second data being associated with a blockchain and representative of a first user profile, said second data comprising said first data.

5. Method according to one of claims 1 to 4, further comprising a step of receiving, from a second remote server, third data representative of a second user profile, said determination step (32) further being a function of said second user profile.

6. Method according to one of claims 1 to 5, for which said first data belong to a set of data comprising data associated with: - a position and / or a neck height, - a head height and / or a distance between the head and said headrest (121), - a gender, and - a type of hairstyle.

7. Method according to one of claims 1 to 6, for which said position is determined from a digital model, said digital model having been learned during a learning phase from fourth data representative of morphological characteristics of a set of users.

8. Computer program comprising instructions for implementing implementation of the method according to any one of the preceding claims, when these instructions are executed by a processor.

9. Device (4) for controlling the position of a head restraint in a vehicle, said device (4) comprising a memory (41) associated with at least one processor (40) configured for implementing the steps of the method according to any one of claims 1 to 7.

10. Vehicle comprising the device according to claim 9.

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