EP3084570A1 - Control device for motor vehicle and control method - Google Patents

Control device for motor vehicle and control method

Info

Publication number
EP3084570A1
EP3084570A1 EP14828180.1A EP14828180A EP3084570A1 EP 3084570 A1 EP3084570 A1 EP 3084570A1 EP 14828180 A EP14828180 A EP 14828180A EP 3084570 A1 EP3084570 A1 EP 3084570A1
Authority
EP
European Patent Office
Prior art keywords
variation
feedback
support pressure
pressure
generated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP14828180.1A
Other languages
German (de)
French (fr)
Inventor
Stéphanie DABIC
Jean-Marc Tissot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dav SA
Original Assignee
Dav SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dav SA filed Critical Dav SA
Publication of EP3084570A1 publication Critical patent/EP3084570A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/10—Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/25—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using haptic output
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/143—Touch sensitive instrument input devices
    • B60K2360/1438—Touch screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/143—Touch sensitive instrument input devices
    • B60K2360/1438—Touch screens
    • B60K2360/1442—Emulation of input devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/01—Indexing scheme relating to G06F3/01
    • G06F2203/014—Force feedback applied to GUI

Definitions

  • the present invention relates to a control device for a motor vehicle and a control method of said control device.
  • buttons on the dashboard of a car cockpit results in an increase in the number of buttons on the dashboard of a car cockpit.
  • the number of buttons can not be increased to infinity, especially because of the complexity generated, limited space, accessibility or cognitive load.
  • the interaction of the driver with the systems in the car can reproduce a situation of attentional overload in which the driver can not handle at best all the information of the driving task, resulting in errors and a time of longer detection.
  • buttons are centralize by replacing them with a touch screen. This makes it possible to continue to increase the number of functions, these becoming programmable and reconfigurable and exposed temporarily or permanently depending on the context or the activated function.
  • the screen thus includes a possibility of multifunctionality, while dematerializing the buttons and being customizable.
  • the screens have three other major advantages: they allow on the one hand a direct interaction (co-implementation of the display and input), on the other hand they are flexible (the display can be easily configured for a number of functions), and finally they are intuitive (familiar interaction method such as "point").
  • An object of the present invention is to provide a control device and a control method of said control device, which improves the feeling of the user, without hindering driving, which is well perceived and appreciated by users, and which can be discriminable from other signals for an application of touch screens respecting the automotive constraints.
  • the subject of the present invention is a control device for a motor vehicle comprising:
  • a touch surface comprising a contact sensor adapted to measure a pressing pressure on the touch surface for a predetermined duration, and a sensory feedback module configured to generate a tactile feedback in response to contact of the touch surface
  • the sensory feedback module is configured to determine the profile of the sensory feedback to be generated as a function of the variation of the bearing pressure measured on the touch surface for the predetermined duration.
  • the proposed control device improves the impression of support by matching the profile of the sensory feedback with the variation of the support pressure. Distinct sensory feedback is generated depending on whether the pressure pressure variation is strong, medium or low. The sensory feedback can thus be different for the same user at each of his actions according to the force exerted on the tactile surface.
  • the sensory feedback module is configured to evaluate the speed of variation of the pressing pressure and to determine the profile of the sensory feedback generated as a function of the variation of the pressing pressure and as a function of the speed of variation of the pressing pressure for the predetermined duration,
  • the sensory feedback module is configured to determine the acceleration of variation of the bearing pressure and for determining the profile of the sensed feedback generated as a function of the variation of the pressing pressure and as a function of the acceleration of variation of the pressing pressure for the predetermined duration.
  • the correspondence between the feeling and the support is further improved when the profile of the sensory feedback is based on a pair of parameters representative of the pressing pressure.
  • the sensory feedback profile is for example based on the pair of parameters defined by the variation of the bearing pressure and the rate of variation of the bearing pressure or on the torque defined by the support pressure vanation and the acceleration of variation of the support pressure.
  • a dry and strong support thus causes a sensory feedback distinct from a slow and weak support or a weak and weak support or a slow and strong support.
  • the sensory feedback comprises at least two components selected from a vibration, a sound and a visual representation.
  • a sensory feedback comprising at least two components of different sensory modalities has the advantage that for the user, the presentation of one of the components will cause the activation of the other.
  • the presentation of a visual primer previously associated with a sound component facilitates the perceptual processing of sound targets for the user, the mere presentation of the visual component reactivating the associated sound component.
  • the various components of the sensory feedback are for example generated so as to be perceived with a time shift.
  • the visual component is for example generated so as to be perceived before the sound and / or vibration components.
  • the vibration component is for example generated so as to be perceived before the sound component.
  • the generations of the different components of the sensory feedback are shifted in time. This desynchronization of perceptions of the components of the sensory feedback makes it possible to better reproduce the temporal offsets of tactile, auditory or visual returns that may exist for conventional mechanical buttons, which are linked to their mechanical functioning.
  • the sensory feedback module comprises a library of sensory returns indexed at least as a function of the pressing pressure.
  • the sensory feedback module is configured to determine the profile of the sensory feedback from a preprogrammed control law at least as a function of the variation of the pressing pressure.
  • the subject of the invention is also a method of controlling a control device for motor vehicle as described above in which a sensory feedback is generated in response to a contact of the tactile surface characterized in that the profile of the generated sensory feedback is determined as a function of the variation of the bearing pressure measured on the touch surface for a predetermined duration.
  • the rate of variation of the pressing pressure is determined and the profile of the sensed feedback generated is also determined as a function of the speed of variation of the pressing pressure for the predetermined duration.
  • the acceleration of variation of the bearing pressure is determined and the profile of the sensed feedback generated is also determined as a function of the acceleration of variation of the bearing pressure during the predetermined duration.
  • a first sensory feedback is generated for a pressure variation of less than 1, 2N,
  • a second sensory feedback is generated for a variation of pressing pressure between 1, 2 N and 1, 5N, and
  • a third sensory feedback is generated for a pressure variation greater than 1.5N; the first, second and third sensory feedbacks being distinct from each other.
  • the profile of a vibratory-type sensitive feedback is modified by modifying the value of at least one parameter chosen from the amplitude, the duration, the acceleration and the frequency of the vibration. .
  • the first, the second and the third sensory feedbacks are, for example, vibrations, at least one parameter chosen from among the amplitude, the duration and the acceleration, has a value which increases with the increase of the pressure variation of support .
  • the control method provides, for example, a delay time for which sensory feedback is not generated after the generation of the sensing feedback. This simulates a sensation of abutment of the depression.
  • a sensory abutment feedback is generated after the generation of the back feel feedback.
  • the sensory back-stop intermediate between the sensory back-rest and the sensory-loosened return, makes it possible to reproduce the mechanical sensation of stop perceived when a key reaches its abutment.
  • support since the finger of the user remains pressed on the touch surface by exerting a slight pressure variation, even after a delay time, the user must keep the release control and therefore not activate a function without wanting if this is taken into account when released and if the variation of pressure of support is insufficient.
  • the predetermined duration during which the variation of the pressing pressure is measured is, for example, less than 30 milliseconds.
  • FIG. 1 represents an example of a control device for a motor vehicle
  • FIG. 2 represents a vibratory feedback as a function of time (curve 2) matched to a user's pressing pressure on the tactile surface as a function of time (curve 1), and
  • Figure 3 illustrates a control method of a control device.
  • FIG. 1 represents a control device for a motor vehicle 1, for example arranged in a control panel of the vehicle.
  • the control device 1 comprises a touch-sensitive surface 2 and a sensory feedback module 4 configured to generate a tactile feedback in response to contact of the touch-sensitive surface 2 by a finger or any other activation means (for example a stylus). a user having, for example, modified or selected a command.
  • the touch surface 2 is for example that of a touch screen.
  • a touch screen is an input device that allows users of a system to interact with it through touch. It allows the direct interaction of the user on the zone he wants to select for various uses such as, for example, the selection of a destination address or a name in a directory, the air conditioning system settings, enabling a dedicated function, selecting a track from a list, or generally scrolling through a list of choices, selection, validation, and error.
  • the touch surface 2 comprises a plate carrying a contact sensor capable of measuring a pressing pressure on the touch surface for a predetermined duration.
  • the contact sensor is for example a pressure sensor, such as using the FSR technology for "Force Sensing Resistor” in English, that is to say using pressure-sensitive resistors.
  • SFR technology has a very good resistance and robustness, while having a high resolution. In addition, it is very reactive and precise, while being relatively stable over time. It can have a fairly long life, and can be used with any type of activation means, at a relatively low cost.
  • the senor operates by contacting two conductive layers for example by the action of the finger.
  • One of the embodiments consists in covering a glass slab with a layer of conductive ink, on which is superimposed a sheet of flexible polyester, itself covered on its inner face with a layer of conductive ink. Insulating and transparent pads isolate the slab from the polyester sheet. The activation on the tactile surface produces a slight depression of the polyester layer, which comes into contact with the conductive layer of the glass slab. The local contact of the two conductive layers causes a modification of the electric current applied to the slab, corresponding to a voltage gradient.
  • the contact sensor comprises semiconductor layers flexible sandwiched between for example a conductive layer and a resistive layer.
  • a suitable voltage By exerting pressure or slipping on the FSR layer, its ohmic resistance decreases thus allowing, by application of a suitable voltage, to measure the pressure applied and / or the location of the place where the pressure is exerted.
  • the contact sensor is based on a capacitive technology.
  • the sensory return is for example a haptic feedback, we call "haptic", a return by touch.
  • the haptic feedback is for example a vibratory or vibrotactile signal.
  • the sensory feedback module 4 comprises at least one actuator 3 connected to the plate of the touch surface 2, to generate a vibration as a function of a signal from the contact sensor.
  • the vibration is for example directed in the plane of the touch surface 2 or orthogonally to the plane of the touch surface 2 or directed in a combination of these two directions.
  • the haptic feedback is a vibratory signal such as a vibration produced by a sinusoidal control signal or by a control signal comprising one or a succession of pulses, sent to the actuator 3.
  • the actuator 3 are arranged under the tactile surface 2, in different positions (in the center or on one side) or in different orientations (in the direction of the support on the surface or in another axis).
  • the actuator 3 is based on a technology similar to that of the speaker (in English: "Voice Coil"). It comprises a fixed part and a part movable in translation in an air gap of the fixed part for example of the order of 200 ⁇ , between a first and a second position, parallel to a longitudinal axis of the movable part.
  • the moving part is for example formed by a movable magnet sliding inside a fixed coil or by a movable coil sliding around a fixed magnet, the movable part and the fixed part cooperating by electromagnetic effect.
  • the moving parts are connected to the plate so that the movement of the moving parts causes the translational movement of the plate to generate the haptic feedback to the user's finger.
  • This technology is easily controllable and can move large masses, such as a screen, at various frequencies and meets the strict automotive constraints that are low cost, good resistance to significant temperature variations, and ease of use. in place.
  • the sensory feedback module 4 is configured to determine the profile of the sensory feedback to be generated as a function of the pressure measured on the touch surface 2 for a predetermined duration.
  • the profile of the sensory feedback defines the general form of the sensory feedback, that is to say, its pace or all the parameters allowing to characterize it.
  • the pressing pressure on the touch surface 2 is measured.
  • the pressing pressure is measured over a predetermined time dt, for example by averaging the pressing pressure over the predetermined duration dt.
  • the predetermined duration dt is preferably less than 30 milliseconds, such as of the order of 20 milliseconds.
  • the profile of the sensory feedback to be generated is determined as a function of this measured pressure pressure variation, for example from a library of sensory returns indexed as a function of the pressure variation of support.
  • the profile of the sensory feedback is selected from among several sensory feedback profiles prerecorded in the library.
  • the profile of the sensory feedback is determined from a preprogrammed control law that makes it possible, for example, to calculate a parameter of the profile as a function of the variation of the bearing pressure or to transform the variation of bearing pressure. in a sensitive return.
  • a first sensory feedback is generated for a weak support corresponding to a pressure variation of support less than 1, 2N
  • a second sensory feedback is generated for a mean support corresponding to a variation of pressure of support between 1 , 2N and 1, 5N
  • a third sensory feedback is generated for a strong support corresponding to a pressure variation greater than 1.5N.
  • the first, second and third sensory feedbacks are distinct from each other.
  • the profile of the sensory feedback is modified by modifying the value of at least one parameter chosen from the amplitude, the duration, the acceleration and the frequency of the vibration.
  • the value of these parameters increases for example with the increase of the variation of pressing pressure.
  • the first, second and third sensory feedbacks are vibrations and that at least one parameter selected from amplitude, duration and acceleration have values which increase with the increase of the variation of support pressure.
  • the amplitude of the first vibratory feedback has a value lower than the amplitude of the second vibratory feedback, the amplitude of the second vibratory feedback being less than the amplitude of the third vibratory feedback.
  • These three sensory feedback profiles are not, for example, stored in memory in a library corresponding to the corresponding pressure variations.
  • the sensory feedback module 4 is configured to evaluate the speed of variation of the pressing pressure and to determine the profile of the sensed feedback generated as a function of the variation of the pressing pressure and as a function of the rate of variation of the pressing pressure for the predetermined duration.
  • the sensory feedback module 4 is configured to determine the acceleration of variation of the pressing pressure and to determine the profile of the sensed feedback generated as a function of the variation of the pressing pressure and in function the acceleration of variation of the support pressure during the predetermined duration.
  • the correspondence between felt and support is further improved when the sensory feedback profile is based on a pair of parameters representative of the variation of the pressure of support.
  • the profile of the sensory feedback is for example based on the variation of the pressure of support and the speed of the variation of the pressure of support or on the variation of pressure of support and on the acceleration of the variation of the pressure support.
  • a dry and strong support thus causes a sensory return distinct from a slow and weak return or a weak and weak support or a slow and strong support.
  • the sensory feedback whose profile is a function of the variation of the bearing pressure measured on the touch surface 2 during the predetermined time dt is for example generated after crossing a threshold.
  • This threshold allowing the triggering of the generation of the sensory feedback can be a threshold of variation of the support pressure, of speed or of acceleration of variations of pressing pressure or else of variation of the contact area of the finger.
  • the sensory feedback comprises for example at least two components chosen from a vibration, a sound and a visual representation.
  • a sensory feedback comprising at least two components of different sensory modalities, has the advantage that for the user, the presentation of one of the components will cause the activation of the other.
  • the presentation of a visual primer previously associated with a sound component facilitates the perceptual processing of sound targets for the user, the mere presentation of the visual component reactivating the associated sound component.
  • the various components of the sensory feedback can be provided to generate the various components of the sensory feedback so that they are perceived with a shift in time, for example by shifting in time their respective generation.
  • the different components of sensory feedback are not necessarily perceived simultaneously.
  • This desynchronization of the perceptions of the components of the sensory feedback can correspond as on a conventional push button to the delay necessary for the ascent from the pressed key to its state of rest and the resulting noise.
  • the proposed control device 1 improves the impression of support by matching the profile of the return sensitive with the variation of pressure of support. Distinct sensory feedback is generated depending on whether the support is loud, medium or weak.
  • Figures 2 and 3 illustrate an embodiment of the control method of the control device wherein the sensory feedback comprises at least one vibratory feedback simulating the "pushed-released" of a button-type button.
  • the bearing pressure (curve 1) on the touch surface 2 is measured.
  • the pressing pressure is measured on a first predetermined duration dt1, such as of the order of 20 milliseconds.
  • the profile of a sensory back-rest R1 to be generated is determined as a function of this variation of measured pressure, for example from a library of sensory returns indexed as a function of the bearing pressure or again, from a control law preprogrammed according to the support pressure.
  • the bearing feedback R1 to generate a first vibration for a bearing pressure of less than 1, 2N, a second vibration for a pressure of between 1, 2N and 1.5N, and a third vibration for a bearing pressure greater than 1.5N.
  • the duration of the vibration varies with the measured bearing pressure.
  • a first vibration has a duration less than the duration of the second vibration and the duration of the second vibration is less than the amplitude of the third vibration.
  • the vibration of the sensing feedback R1 whose profile is a function of the variation of the bearing pressure measured on the touch surface 2 during this first predetermined time dt1 (curve 2) is generated, for example, after the bearing pressure has passed a first pressure threshold S1.
  • the sensory feedback feedback R1 perceived by the user can then be different depending on whether he pressed strongly or not on the touch surface 2.
  • the determination of the sensory feedback R1 can also be determined the function of a second parameter, such as the rate of variation of the pressure of support or the acceleration of variation of the pressing pressure.
  • the sensory feedback R1 may vary depending on the value of this second parameter.
  • the vibration is for example produced by a sinusoidal control signal sent to the actuator 3.
  • the vibration felt extends over the vibration duration Dv (curve 2), greater than the duration of the control signal.
  • a delay time Da at least of the order of 20 ms between the generation of the two control signals of the sensory and relaxed feedbacks, during which no sensory feedback is generated.
  • no control signal is sent to the actuator 3 after the one generating the sensing feedback R1 during a delay time Da of 20ms, a duration Da 'of about 10ms from the end of the vibration of the tactile surface 2 of the sensing feedback R1. This simulates a sensation of abutment abutment.
  • a sensory abutment feedback is generated after the generation of the sensing back-rest R1, for example at the end of the vibration of the touch-sensitive surface 2 of the sensing back-rest R1 and / or after the crossing.
  • a pressure threshold to simulate the sensation of thrust abutment between the generation of sensory feedback and relaxation. The sensory feedback stop thus makes it possible to reproduce the perceived mechanical sensation when a depressed key reaches its mechanical stop.
  • a decrease in the pressing pressure is measured over a second predetermined duration dt2, which may be different from the first predetermined duration dt1.
  • the profile of the sensory feedback loop R2 to be generated is determined as a function of this measured bearing pressure, for example from a library of sensory returns indexed as a function of the pressing pressure, or again from 'a law of order preprogrammed according to the pressing pressure.
  • the vibration of the relaxed return return R2 has a smaller amplitude than the amplitude of the vibration of the back rest sensing R1, which makes it possible to further copy the effect of an existing button.
  • a third step 103 the vibration of the relaxed release feedback R2 whose profile is a function of the variation of the bearing pressure measured on the touch surface 2 during this second predetermined duration dt2 (curve 2) is generated for example after the pressure drop has passed a second pressure threshold S2.
  • the sensory stop feedback or the flow of the delay time Da do not necessarily condition the emission of the sensory feedback of release R2.
  • a sensitive return of release R2 can be generated while the sensory stop return has not yet been sent or before the expiration of the delay time Da, for example because the support pressure has stopped increasing and decreases sufficiently before the end of the vibration of the tactile surface 2 of the sensory feedback R1.
  • the total duration of the sensory feedback including the first predetermined duration dt1, the duration of vibration Dv, the duration of the sensory feedback and rest periods R1, R2 and the delay time Da or the sensory feedback of stop is short, that is to say less than 200 ms and preferably between 70 and 200 ms, such that between 110 and 140 ms. Short signals are indeed better perceived by the user.
  • the frequency of the vibration of the touch surface 2 is for example between 60 and 200Hz, such as 120Hz.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

The invention relates to a control device for a motor vehicle, which includes: a touch-sensitive surface (2) including a contact sensor capable of measuring a pressing pressure on the touch-sensitive surface (2) during a predetermined time (dt; dt1, dt2), and a haptic feedback module (4) configured such as to generate a haptic feedback in response to a contact of the touch-sensitive surface (2), characterised in that the haptic feedback module (4) is configured such as to determine the profile of the haptic feedback to be generated in accordance with the variation in the pressing pressure measured on the touch-sensitive surface (2) during the predetermined time (dt; dt1, dt2).

Description

DISPOSITIF DE CONTROLE POUR VEHICULE AUTOMOBILE ET PROCEDE DE  CONTROL DEVICE FOR A MOTOR VEHICLE AND METHOD OF
COMMANDE  ORDERED
La présente invention concerne un dispositif de contrôle pour véhicule automobile et un procédé de commande dudit dispositif de contrôle. The present invention relates to a control device for a motor vehicle and a control method of said control device.
Depuis ces dernières années, les voitures sont devenues plus faciles à manipuler avec l'apparition de nouvelles technologies émergentes (par exemple direction assistée, ABS, régulateur de vitesse, radar de recul etc.). Paradoxalement toutefois, le nombre de fonctions à contrôler pendant la conduite a lui aussi beaucoup augmenté. Ceci peut induire une certaine complexité liée à la mauvaise connaissance de l'utilisation de ces fonctionnalités et à leur diversité. La voiture est devenue un véritable espace de vie, perçue comme un centre de communication personnel et interconnecté : avec par exemple le lecteur MP3, le GPS, la connexion avec les téléphones portables.  In recent years, cars have become easier to handle with the emergence of new emerging technologies (eg power steering, ABS, cruise control, reversing radar etc.). Paradoxically, however, the number of functions to be controlled while driving has also increased significantly. This can lead to some complexity related to the poor knowledge of the use of these features and their diversity. The car has become a real living space, perceived as a personal and interconnected communication center: with for example MP3 player, GPS, connection with mobile phones.
L'introduction de ces nouvelles fonctions se traduit par une augmentation du nombre de boutons sur le tableau de bord d'un cockpit de voiture. Cependant, le nombre de boutons ne peut pas être augmenté à l'infini, du fait notamment de la complexité engendrée, de l'espace limité, de l'accessibilité ou de la charge cognitive. De plus, l'interaction du conducteur avec les systèmes embarqués dans la voiture peut reproduire une situation de surcharge attentionnelle dans laquelle le conducteur peut ne pas traiter au mieux toutes les informations de la tâche de conduite, se traduisant par des erreurs et un temps de détection plus long.  The introduction of these new features results in an increase in the number of buttons on the dashboard of a car cockpit. However, the number of buttons can not be increased to infinity, especially because of the complexity generated, limited space, accessibility or cognitive load. In addition, the interaction of the driver with the systems in the car can reproduce a situation of attentional overload in which the driver can not handle at best all the information of the driving task, resulting in errors and a time of longer detection.
Une possibilité est de centraliser les boutons en les remplaçant par un écran tactile. Ceci permet de continuer à augmenter le nombre des fonctions, celles-ci devenant programmables et reconfigurables et exposées de façon temporaire ou permanente selon le contexte ou la fonction activée. L'écran inclut ainsi une possibilité de multifonctionnalité, tout en dématérialisant les boutons et en étant personnalisable. De plus, les écrans présentent trois autres avantages majeurs : ils permettent d'une part une interaction directe (la co-implantation de l'affichage et de saisie), d'autre part ils sont souples (l'affichage peut être facilement configuré pour un certain nombre de fonctions), et enfin ils sont intuitifs (méthode d'interaction familière comme par exemple « pointer »).  One possibility is to centralize the buttons by replacing them with a touch screen. This makes it possible to continue to increase the number of functions, these becoming programmable and reconfigurable and exposed temporarily or permanently depending on the context or the activated function. The screen thus includes a possibility of multifunctionality, while dematerializing the buttons and being customizable. In addition, the screens have three other major advantages: they allow on the one hand a direct interaction (co-implementation of the display and input), on the other hand they are flexible (the display can be easily configured for a number of functions), and finally they are intuitive (familiar interaction method such as "point").
Cependant, contrairement au cas d'un bouton-poussoir, lorsque le conducteur interagit avec un écran tactile, il ne reçoit aucune rétroaction liée directement à son action sur l'interface, autre que le simple contact de son doigt s'écrasant sur l'écran. Afin de compenser la perte d'informations causée par la substitution d'interfaces mécaniques classiques par des écrans tactiles, il est prévu l'ajout d'un retour, tel que haptique, pour fournir une rétroaction du système à l'utilisateur. Ce retour permet d'éviter l'ambiguïté possible de la prise en compte de l'action de l'utilisateur par le système, susceptible de favoriser l'apparition de situations dangereuses. Il doit cependant en outre éviter de surcharger les voies visuelles et auditives déjà très sollicitées par la tâche de conduite. En effet, l'utilisation d'écrans tactiles dans un véhicule automobile ne doit pas gêner l'attention du conducteur. However, contrary to the case of a push button, when the driver interacts with a touch screen, he receives no feedback directly related to his action on the interface, other than the mere touch of his finger crashing on the screen. screen. In order to compensate for the loss of information caused by the substitution of conventional mechanical interfaces by touch screens, there is provision for the addition of feedback, such as haptic feedback, to provide system feedback to the user. This return makes it possible to avoid the possible ambiguity of taking into account the action of the user by the system, likely to favor the appearance of dangerous situations. However, it must also avoid overloading the visual and auditory pathways already heavily involved in the driving task. Indeed, the use of touch screens in a motor vehicle must not disturb the attention of the driver.
Un but de la présente invention est de fournir un dispositif de contrôle et un procédé de commande dudit dispositif de contrôle, qui améliore le ressenti de l'utilisateur, sans gêner la conduite, qui soit bien perçu et apprécié par les utilisateurs, et qui puisse être discriminable des autres signaux pour une application d'écrans tactiles respectant les contraintes automobiles.  An object of the present invention is to provide a control device and a control method of said control device, which improves the feeling of the user, without hindering driving, which is well perceived and appreciated by users, and which can be discriminable from other signals for an application of touch screens respecting the automotive constraints.
A cet effet, la présente invention a pour objet un dispositif de contrôle pour véhicule automobile comportant :  For this purpose, the subject of the present invention is a control device for a motor vehicle comprising:
une surface tactile comportant un capteur de contact apte à mesurer une pression d'appui sur la surface tactile pendant une durée prédéterminée, et un module de retour sensitif configuré pour générer un retour sensitif en réponse à un contact de la surface tactile,  a touch surface comprising a contact sensor adapted to measure a pressing pressure on the touch surface for a predetermined duration, and a sensory feedback module configured to generate a tactile feedback in response to contact of the touch surface,
caractérisé en ce que le module de retour sensitif est configuré pour déterminer le profil du retour sensitif à générer en fonction de la variation de pression d'appui mesurée sur la surface tactile pendant la durée prédéterminée.  characterized in that the sensory feedback module is configured to determine the profile of the sensory feedback to be generated as a function of the variation of the bearing pressure measured on the touch surface for the predetermined duration.
Contrairement à une situation dans laquelle un même retour sensitif serait généré à l'utilisateur alors même qui réaliserait un appui fort, moyen ou faible, le dispositif de contrôle proposé améliore l'impression d'appui en faisant correspondre le profil du retour sensitif avec la variation de la pression d'appui. Des retours sensitifs distincts sont générés selon que la variation de pression d'appui est forte, moyenne ou faible. Le retour sensitif peut ainsi être différent pour un même utilisateur à chacune de ses actions selon la force exercée sur la surface tactile.  Contrary to a situation in which the same sensory feedback would be generated to the user even if that would achieve a strong, medium or weak support, the proposed control device improves the impression of support by matching the profile of the sensory feedback with the variation of the support pressure. Distinct sensory feedback is generated depending on whether the pressure pressure variation is strong, medium or low. The sensory feedback can thus be different for the same user at each of his actions according to the force exerted on the tactile surface.
On peut prévoir en outre que :  In addition, it can be provided that:
- le module de retour sensitif soit configuré pour évaluer la vitesse de variation de la pression d'appui et pour déterminer le profil du retour sensitif généré en fonction de la variation de la pression d'appui et en fonction de la vitesse de variation de la pression d'appui pendant la durée prédéterminée, the sensory feedback module is configured to evaluate the speed of variation of the pressing pressure and to determine the profile of the sensory feedback generated as a function of the variation of the pressing pressure and as a function of the speed of variation of the pressing pressure for the predetermined duration,
- le module de retour sensitif soit configuré pour déterminer l'accélération de variation de la pression d'appui et pour déterminer le profil du retour sensitif généré en fonction de la variation de la pression d'appui et en fonction de l'accélération de variation de la pression d'appui pendant la durée prédéterminée. - the sensory feedback module is configured to determine the acceleration of variation of the bearing pressure and for determining the profile of the sensed feedback generated as a function of the variation of the pressing pressure and as a function of the acceleration of variation of the pressing pressure for the predetermined duration.
La correspondance entre le ressenti et l'appui est encore améliorée lorsque le profil du retour sensitif est basé sur un couple de paramètres représentatifs de la pression d'appui. Le profil du retour sensitif est par exemple basé sur le couple de paramètres défini par la variation de pression d'appui et la vitesse de variation de la pression d'appui ou sur le couple défini par la vanation de pression d'appui et l'accélération de variation de la pression d'appui. Un appui sec et fort provoque ainsi un retour sensitif distinct d'un appui lent et faible ou d'un appui sec et faible ou encore d'un appui lent et fort.  The correspondence between the feeling and the support is further improved when the profile of the sensory feedback is based on a pair of parameters representative of the pressing pressure. The sensory feedback profile is for example based on the pair of parameters defined by the variation of the bearing pressure and the rate of variation of the bearing pressure or on the torque defined by the support pressure vanation and the acceleration of variation of the support pressure. A dry and strong support thus causes a sensory feedback distinct from a slow and weak support or a weak and weak support or a slow and strong support.
Selon un exemple de réalisation, le retour sensitif comporte au moins deux composantes choisies parmi une vibration, un son et une représentation visuelle. En effet, un retour sensitif comportant au moins deux composantes de modalités sensorielles différentes présente l'avantage que pour l'utilisateur, la présentation d'une des composantes va entraîner l'activation de l'autre. Par exemple, la présentation d'une amorce visuelle préalablement associée à une composante sonore, facilite le traitement perceptif de cibles sonores pour l'utilisateur, la simple présentation de la composante visuelle réactivant la composante sonore associée.  According to an exemplary embodiment, the sensory feedback comprises at least two components selected from a vibration, a sound and a visual representation. Indeed, a sensory feedback comprising at least two components of different sensory modalities has the advantage that for the user, the presentation of one of the components will cause the activation of the other. For example, the presentation of a visual primer previously associated with a sound component, facilitates the perceptual processing of sound targets for the user, the mere presentation of the visual component reactivating the associated sound component.
Les différentes composantes du retour sensitif sont par exemple générées de manière à être perçues avec un décalage temporel. La composante visuelle est par exemple générée de manière à être perçue avant les composantes sonores et/ou de vibration. La composante de vibration est par exemple générée de manière à être perçue avant la composante sonore. Par exemple pour cela, les générations des différentes composantes du retour sensitif sont décalées dans le temps. Cette désynchronisation des perceptions des composantes du retour sensitif permet de mieux reproduire les décalages temporels de retours tactiles, auditifs ou visuels pouvant exister pour des boutons mécaniques classiques, qui sont liés à leur fonctionnement mécanique.  The various components of the sensory feedback are for example generated so as to be perceived with a time shift. The visual component is for example generated so as to be perceived before the sound and / or vibration components. The vibration component is for example generated so as to be perceived before the sound component. For example for this, the generations of the different components of the sensory feedback are shifted in time. This desynchronization of perceptions of the components of the sensory feedback makes it possible to better reproduce the temporal offsets of tactile, auditory or visual returns that may exist for conventional mechanical buttons, which are linked to their mechanical functioning.
Selon un exemple de réalisation, le module de retour sensitif comporte une bibliothèque de retours sensitifs répertoriés au moins en fonction de la pression d'appui.  According to an exemplary embodiment, the sensory feedback module comprises a library of sensory returns indexed at least as a function of the pressing pressure.
Selon un autre exemple de réalisation, le module de retour sensitif est configuré pour déterminer le profil du retour sensitif à partir d'une loi de commande préprogrammée au moins en fonction de la variation de la pression d'appui.  According to another exemplary embodiment, the sensory feedback module is configured to determine the profile of the sensory feedback from a preprogrammed control law at least as a function of the variation of the pressing pressure.
L'invention a aussi pour objet un procédé de commande d'un dispositif de contrôle pour véhicule automobile tel que décrit précédemment dans lequel un retour sensitif est généré en réponse à un contact de la surface tactile caractérisé en ce que le profil du retour sensitif généré est déterminé en fonction de la variation de la pression d'appui mesurée sur la surface tactile pendant une durée prédéterminée. The subject of the invention is also a method of controlling a control device for motor vehicle as described above in which a sensory feedback is generated in response to a contact of the tactile surface characterized in that the profile of the generated sensory feedback is determined as a function of the variation of the bearing pressure measured on the touch surface for a predetermined duration.
Selon un exemple de réalisation du procédé de commande, on détermine la vitesse de variation de la pression d'appui et le profil du retour sensitif généré est également déterminé en fonction de la vitesse de variation de la pression d'appui pendant la durée prédéterminée.  According to an exemplary embodiment of the control method, the rate of variation of the pressing pressure is determined and the profile of the sensed feedback generated is also determined as a function of the speed of variation of the pressing pressure for the predetermined duration.
Selon un autre exemple de réalisation du procédé de commande, on détermine l'accélération de variation de la pression d'appui et le profil du retour sensitif généré est également déterminé en fonction de l'accélération de variation de la pression d'appui pendant la durée prédéterminée.  According to another exemplary embodiment of the control method, the acceleration of variation of the bearing pressure is determined and the profile of the sensed feedback generated is also determined as a function of the acceleration of variation of the bearing pressure during the predetermined duration.
Selon un exemple de réalisation du procédé de commande:  According to an exemplary embodiment of the control method:
- un premier retour sensitif est généré pour une variation de pression d'appui inférieure à 1 , 2N,  a first sensory feedback is generated for a pressure variation of less than 1, 2N,
- un deuxième retour sensitif est généré pour une variation de pression d'appui comprise entre 1 , 2 N et 1 , 5N, et  a second sensory feedback is generated for a variation of pressing pressure between 1, 2 N and 1, 5N, and
un troisième retour sensitif est généré pour une variation de pression d'appui supérieure à 1 , 5N; le premier, le deuxième et le troisième retour sensitifs étant distincts les uns des autres.  a third sensory feedback is generated for a pressure variation greater than 1.5N; the first, second and third sensory feedbacks being distinct from each other.
Selon un exemple de réalisation du procédé de commande, on modifie le profil d'un retour sensitif de type vibratoire en modifiant la valeur d'au moins un paramètre choisi parmi l'amplitude, la durée, l'accélération et la fréquence de la vibration.  According to an exemplary embodiment of the control method, the profile of a vibratory-type sensitive feedback is modified by modifying the value of at least one parameter chosen from the amplitude, the duration, the acceleration and the frequency of the vibration. .
Le premier, le deuxième et le troisième retour sensitifs sont par exemple des vibrations, au moins un paramètre choisi parmi l'amplitude, la durée et l'accélération, présente une valeur qui augmente avec l'augmentation de la variation de pression d'appui.  The first, the second and the third sensory feedbacks are, for example, vibrations, at least one parameter chosen from among the amplitude, the duration and the acceleration, has a value which increases with the increase of the pressure variation of support .
Selon un exemple de réalisation du procédé de commande:  According to an exemplary embodiment of the control method:
on mesure une augmentation de la pression d'appui sur une durée prédéterminée et on génère un retour sensitif d'appui dont le profil est fonction de la variation de la pression d'appui mesurée,  an increase in the pressing pressure is measured over a predetermined period of time and a back-up pressure return is generated whose profile is a function of the variation of the measured bearing pressure,
- puis, lorsque la pression d'appui mesurée cesse d'augmenter et décroît, on mesure une diminution de la pression d'appui sur une durée prédéterminée et on génère un retour sensitif de relâché dont le profil est fonction de la variation de la pression d'appui mesurée. Ainsi, on simule le « poussé-relâché » d'un bouton mécanique. En outre, le retour sensitif d'appui peut être différent du retour sensitif de relâché, selon les intensités et le cas échéant, selon les vitesses de l'appui pour l'actionnement d'un bouton de type touche. - Then, when the measured bearing pressure ceases to increase and decreases, a decrease in the pressing pressure is measured over a predetermined time and generates a relaxed release feedback whose profile is a function of the pressure variation. measured support. Thus, we simulate the "pushed-loose" of a mechanical button. In addition, the sensory back-rest may be different from the sensitive back-release, depending on the intensities and, if appropriate, on the speeds of the support for the actuation of a button-type button.
Le procédé de commande prévoit par exemple une durée de temporisation pour laquelle on ne génère pas de retour sensitif après la génération du retour sensitif d'appui. On simule ainsi une sensation de butée de l'enfoncement.  The control method provides, for example, a delay time for which sensory feedback is not generated after the generation of the sensing feedback. This simulates a sensation of abutment of the depression.
Selon un autre exemple, on génère un retour sensitif de butée après la génération du retour sensitif d'appui. Le retour sensitif de butée, intermédiaire entre le retour sensitif d'appui et le retour sensitif de relâché, permet de reproduire la sensation mécanique de butée perçue lorsqu'une touche atteint sa butée.  According to another example, a sensory abutment feedback is generated after the generation of the back feel feedback. The sensory back-stop, intermediate between the sensory back-rest and the sensory-loosened return, makes it possible to reproduce the mechanical sensation of stop perceived when a key reaches its abutment.
En outre, on peut prévoir de ne pas générer de retour sensitif tant que la pression d'appui mesurée cesse d'augmenter et décroît avec une variation de pression d'appui inférieure à un seuil de variation de pression prédéterminé après la génération du retour sensitif d'appui. En effet, lorsque le doigt de l'utilisateur reste appuyé sur la surface tactile en exerçant une faible variation de pression, même après une durée de temporisation, l'utilisateur doit garder le contrôle du relâché et donc ne pas activer une fonction sans le vouloir si celle-ci est prise en compte au relâché et si la variation de pression d'appui est insuffisante.  In addition, provision can be made not to generate sensory feedback as long as the measured bearing pressure ceases to increase and decreases with a variation of bearing pressure lower than a predetermined pressure variation threshold after the generation of the sensory feedback. support. Indeed, when the finger of the user remains pressed on the touch surface by exerting a slight pressure variation, even after a delay time, the user must keep the release control and therefore not activate a function without wanting if this is taken into account when released and if the variation of pressure of support is insufficient.
La durée prédéterminée pendant laquelle on mesure la variation de pression d'appui est par exemple inférieure à 30 millisecondes.  The predetermined duration during which the variation of the pressing pressure is measured is, for example, less than 30 milliseconds.
DESCRIPTION SOMMAIRE DES DESSINS SUMMARY DESCRIPTION OF THE DRAWINGS
D'autres avantages et caractéristiques apparaîtront à la lecture de la description de l'invention, ainsi que sur les figures annexées qui représentent un exemple de réalisation non limitatif de l'invention et sur lesquelles : Other advantages and characteristics will appear on reading the description of the invention, as well as on the appended figures which represent a non-limiting exemplary embodiment of the invention and in which:
La figure 1 représente un exemple de dispositif de contrôle pour véhicule automobile,  FIG. 1 represents an example of a control device for a motor vehicle,
là figure 2 représente un retour vibratoire en fonction du temps (courbe 2) mis en correspondance avec la pression d'appui d'un utilisateur sur la surface tactile en fonction du temps (courbe 1), et  FIG. 2 represents a vibratory feedback as a function of time (curve 2) matched to a user's pressing pressure on the tactile surface as a function of time (curve 1), and
la figure 3 illustre un procédé de commande d'un dispositif de contrôle.  Figure 3 illustrates a control method of a control device.
Sur ces figures, les éléments identiques portent les mêmes numéros de référence. DESCRIPTION DÉTAILLÉE In these figures, the identical elements bear the same reference numbers. DETAILED DESCRIPTION
La figure 1 représente un dispositif de contrôle pour véhicule automobile 1 , par exemple agencé dans un tableau de commande du véhicule. FIG. 1 represents a control device for a motor vehicle 1, for example arranged in a control panel of the vehicle.
Le dispositif de contrôle 1 comporte une surface tactile 2 et un module de retour sensitif 4 configuré pour générer un retour sensitif en réponse à un contact de la surface tactile 2 par un doigt ou tout autre moyen d'activation (par exemple un stylet) d'un utilisateur ayant par exemple modifié ou sélectionné une commande.  The control device 1 comprises a touch-sensitive surface 2 and a sensory feedback module 4 configured to generate a tactile feedback in response to contact of the touch-sensitive surface 2 by a finger or any other activation means (for example a stylus). a user having, for example, modified or selected a command.
La surface tactile 2 est par exemple celle d'un écran tactile. Un écran tactile est un périphérique d'entrée permettant aux utilisateurs d'un système d'interagir avec celui-ci grâce au toucher. Il permet l'interaction directe de l'utilisateur sur la zone qu'il veut sélectionner pour des utilisations diverses comme par exemple, la sélection d'une adresse de destination ou d'un nom dans un répertoire, les réglages du système de climatisation, l'activation d'une fonction dédiée, la sélection d'une piste parmi une liste, ou d'une manière générale le défilement parmi une liste de choix, la sélection, la validation, et l'erreur.  The touch surface 2 is for example that of a touch screen. A touch screen is an input device that allows users of a system to interact with it through touch. It allows the direct interaction of the user on the zone he wants to select for various uses such as, for example, the selection of a destination address or a name in a directory, the air conditioning system settings, enabling a dedicated function, selecting a track from a list, or generally scrolling through a list of choices, selection, validation, and error.
La surface tactile 2 comporte une plaque portant un capteur de contact apte à mesurer une pression d'appui sur la surface tactile pendant une durée prédéterminée.  The touch surface 2 comprises a plate carrying a contact sensor capable of measuring a pressing pressure on the touch surface for a predetermined duration.
Le capteur de contact est par exemple un capteur de pression, tel qu'utilisant la technologie FSR pour « Force Sensing Resistor » en anglais, c'est-à-dire utilisant des résistances sensibles à la pression. La technologie SFR présente une très bonne résistance et robustesse, tout en ayant une résolution élevée. De plus, elle est très réactive et précise, tout en étant relativement stable dans le temps. Elle peut avoir une durée de vie assez longue, et est utilisable avec tout type de moyen d'activation, à un coût relativement faible.  The contact sensor is for example a pressure sensor, such as using the FSR technology for "Force Sensing Resistor" in English, that is to say using pressure-sensitive resistors. SFR technology has a very good resistance and robustness, while having a high resolution. In addition, it is very reactive and precise, while being relatively stable over time. It can have a fairly long life, and can be used with any type of activation means, at a relatively low cost.
Selon une conception de la technologie FSR, le capteur fonctionne en mettant en contact deux couches conductrices par exemple par l'action du doigt. Une des réalisations consiste à recouvrir une dalle de verre d'une couche d'encre conductrice, sur laquelle est superposée une feuille de polyester souple, elle-même recouverte sur sa face interne d'une couche d'encre conductrice. Des plots isolants et transparents isolent la dalle de la feuille polyester. L'activation sur la surface tactile produit un léger enfoncement de la couche polyester, qui vient en contact avec la couche conductrice de la dalle de verre. Le contact local des deux couches conductrices entraîne une modification du courant électrique appliqué sur la dalle, correspondant à un gradient de tension.  According to a design of the FSR technology, the sensor operates by contacting two conductive layers for example by the action of the finger. One of the embodiments consists in covering a glass slab with a layer of conductive ink, on which is superimposed a sheet of flexible polyester, itself covered on its inner face with a layer of conductive ink. Insulating and transparent pads isolate the slab from the polyester sheet. The activation on the tactile surface produces a slight depression of the polyester layer, which comes into contact with the conductive layer of the glass slab. The local contact of the two conductive layers causes a modification of the electric current applied to the slab, corresponding to a voltage gradient.
Selon un autre exemple, le capteur de contact comprend des couches semi-conductrices souples prises en sandwich entre par exemple une couche conductrice et une couche résistive. En exerçant une pression ou un glissé sur la couche FSR, sa résistance ohmique diminue permettant ainsi, par application d'une tension électrique adaptée, de mesurer la pression appliquée et / ou la localisation de l'endroit où la pression est exercée. In another example, the contact sensor comprises semiconductor layers flexible sandwiched between for example a conductive layer and a resistive layer. By exerting pressure or slipping on the FSR layer, its ohmic resistance decreases thus allowing, by application of a suitable voltage, to measure the pressure applied and / or the location of the place where the pressure is exerted.
Selon un autre exemple, le capteur de contact est basé sur une technologie capacitive. In another example, the contact sensor is based on a capacitive technology.
Le retour sensitif est par exemple un retour haptique, on désigne par « haptique », un retour par le toucher. Ainsi, le retour haptique est par exemple un signal vibratoire ou vibrotactile. Dans ce cas, le module de retour sensitif 4 comporte au moins un actionneur 3 relié à la plaque de la surface tactile 2, pour générer une vibration en fonction d'un signal issu du capteur de contact. La vibration est par exemple dirigée dans le plan de la surface tactile 2 ou orthogonalement au plan de la surface tactile 2 ou encore dirigée selon une combinaison de ces deux directions. The sensory return is for example a haptic feedback, we call "haptic", a return by touch. Thus, the haptic feedback is for example a vibratory or vibrotactile signal. In this case, the sensory feedback module 4 comprises at least one actuator 3 connected to the plate of the touch surface 2, to generate a vibration as a function of a signal from the contact sensor. The vibration is for example directed in the plane of the touch surface 2 or orthogonally to the plane of the touch surface 2 or directed in a combination of these two directions.
Le retour haptique est un signal vibratoire tel qu'une vibration produite par un signal de commande sinusoïdal ou par un signal de commande comportant un ou une succession de puises, envoyé à l'actionneur 3. Dans le cas de plusieurs actionneurs, ces derniers sont agencés sous la surface tactile 2, dans différentes positions (au centre ou sur un côté) ou dans différentes orientations (dans la direction de l'appui sur la surface ou dans un autre axe).  The haptic feedback is a vibratory signal such as a vibration produced by a sinusoidal control signal or by a control signal comprising one or a succession of pulses, sent to the actuator 3. In the case of several actuators, the latter are arranged under the tactile surface 2, in different positions (in the center or on one side) or in different orientations (in the direction of the support on the surface or in another axis).
Selon un exemple de réalisation, l'actionneur 3 repose sur une technologie similaire à celle du Haut-Parleur (en anglais : « Voice Coil »). Il comporte une partie fixe et une partie mobile en translation dans un entrefer de la partie fixe par exemple de l'ordre de 200μηη, entre une première et une deuxième position, parallèlement à un axe longitudinal de la partie mobile. La partie mobile est par exemple formée par un aimant mobile coulissant à l'intérieur d'une bobine fixe ou par une bobine mobile coulissant autour d'un aimant fixe, la partie mobile et la partie fixe coopérant par effet électromagnétique. Les parties mobiles sont reliées à la plaque de manière que le mouvement des parties mobiles engendre le mouvement en translation de la plaque pour générer le retour haptique au doigt de l'utilisateur. Cette technologie est facilement contrôlable et permet de déplacer de fortes masses, comme celle d'un écran, à diverses fréquences et respecte les contraintes automobiles très strictes que sont un faible coût, une bonne résistance aux variations de températures importantes, et une facilité de mise en place.  According to an exemplary embodiment, the actuator 3 is based on a technology similar to that of the speaker (in English: "Voice Coil"). It comprises a fixed part and a part movable in translation in an air gap of the fixed part for example of the order of 200μηη, between a first and a second position, parallel to a longitudinal axis of the movable part. The moving part is for example formed by a movable magnet sliding inside a fixed coil or by a movable coil sliding around a fixed magnet, the movable part and the fixed part cooperating by electromagnetic effect. The moving parts are connected to the plate so that the movement of the moving parts causes the translational movement of the plate to generate the haptic feedback to the user's finger. This technology is easily controllable and can move large masses, such as a screen, at various frequencies and meets the strict automotive constraints that are low cost, good resistance to significant temperature variations, and ease of use. in place.
Le module de retour sensitif 4 est configuré pour déterminer le profil du retour sensitif à générer en fonction de la pression d'appui mesurée sur la surface tactile 2 pendant une durée prédéterminée. Le profil du retour sensitif définit la forme générale du retour sensitif, c'est-à-dire son allure ou l'ensemble des paramètres permettant de le caractériser. Ainsi, en cours d'utilisation, la pression d'appui sur la surface tactile 2 est mesurée. Lorsqu'une variation de pression d'appui devient détectable, on mesure la pression d'appui sur une durée prédéterminée dt, par exemple en faisant la moyenne de la pression d'appui sur la durée prédéterminée dt. The sensory feedback module 4 is configured to determine the profile of the sensory feedback to be generated as a function of the pressure measured on the touch surface 2 for a predetermined duration. The profile of the sensory feedback defines the general form of the sensory feedback, that is to say, its pace or all the parameters allowing to characterize it. Thus, in use, the pressing pressure on the touch surface 2 is measured. When a variation of pressing pressure becomes detectable, the pressing pressure is measured over a predetermined time dt, for example by averaging the pressing pressure over the predetermined duration dt.
En outre, afin d'éviter que l'utilisateur perçoive un décalage entre son appui et le ressenti, la durée prédéterminée dt est de préférence inférieure à 30 millisecondes, telle que de l'ordre de 20 millisecondes.  In addition, in order to prevent the user from perceiving an offset between his support and the feeling, the predetermined duration dt is preferably less than 30 milliseconds, such as of the order of 20 milliseconds.
Puis, on détermine le profil du retour sensitif à générer en fonction de cette variation de pression d'appui mesurée, à partir par exemple d'une bibliothèque de retours sensitifs répertoriés en fonction de la variation de pression d'appui. On sélectionne ainsi le profil du retour sensitif parmi plusieurs profils de retour sensitifs préenregistrés dans la bibliothèque. Selon un autre exemple, on détermine le profil du retour sensitif à partir d'une loi de commande préprogrammée permettant par exemple de calculer un paramètre du profil en fonction de la variation de pression d'appui ou de transformer la variation de pression d'appui en un retour sensitif.  Then, the profile of the sensory feedback to be generated is determined as a function of this measured pressure pressure variation, for example from a library of sensory returns indexed as a function of the pressure variation of support. The profile of the sensory feedback is selected from among several sensory feedback profiles prerecorded in the library. According to another example, the profile of the sensory feedback is determined from a preprogrammed control law that makes it possible, for example, to calculate a parameter of the profile as a function of the variation of the bearing pressure or to transform the variation of bearing pressure. in a sensitive return.
Par exemple, un premier retour sensitif est généré pour un appui faible correspondant à une variation de pression d'appui inférieure à 1 , 2N, un deuxième retour sensitif est généré pour un appui moyen correspondant à une variation de pression d'appui comprise entre 1 , 2N et 1 , 5N, et un troisième retour sensitif est généré pour un appui fort correspondant à une variation de pression d'appui supérieure à 1 , 5N. Le premier, le deuxième et le troisième retour sensitifs sont distincts les uns des autres.  For example, a first sensory feedback is generated for a weak support corresponding to a pressure variation of support less than 1, 2N, a second sensory feedback is generated for a mean support corresponding to a variation of pressure of support between 1 , 2N and 1, 5N, and a third sensory feedback is generated for a strong support corresponding to a pressure variation greater than 1.5N. The first, second and third sensory feedbacks are distinct from each other.
Par exemple, on modifie le profil du retour sensitif en modifiant la valeur d'au moins un paramètre choisi parmi l'amplitude, la durée, l'accélération et la fréquence de la vibration. La valeur de ces paramètres augmente par exemple avec l'augmentation de la variation de pression d'appui.  For example, the profile of the sensory feedback is modified by modifying the value of at least one parameter chosen from the amplitude, the duration, the acceleration and the frequency of the vibration. The value of these parameters increases for example with the increase of the variation of pressing pressure.
On prévoit par exemple que le premier, le deuxième et le troisième retour sensitifs sont des vibrations et qu'au moins un paramètre choisi parmi l'amplitude, la durée et l'accélération présentent des valeurs qui augmentent avec l'augmentation de la variation de pression d'appui.  For example, it is expected that the first, second and third sensory feedbacks are vibrations and that at least one parameter selected from amplitude, duration and acceleration have values which increase with the increase of the variation of support pressure.
Par exemple, l'amplitude du premier retour vibratoire présente une valeur inférieure à l'amplitude du deuxième retour vibratoire, l'amplitude du deuxième retour vibratoire étant inférieure à l'amplitude du troisième retour vibratoire. Ces trois profils de retours sensitifs sont pas exemple stockés en mémoire dans une bibliothèque en correspondance avec les variations de pression d'appui correspondantes. Selon un exemple de réalisation, le module de retour sensitif 4 est configuré pour évaluer la vitesse de variation de la pression d'appui et pour déterminer le profil du retour sensitif généré en fonction de la variation de pression d'appui et en fonction de la vitesse de variation de la pression d'appui pendant la durée prédéterminée. For example, the amplitude of the first vibratory feedback has a value lower than the amplitude of the second vibratory feedback, the amplitude of the second vibratory feedback being less than the amplitude of the third vibratory feedback. These three sensory feedback profiles are not, for example, stored in memory in a library corresponding to the corresponding pressure variations. According to an exemplary embodiment, the sensory feedback module 4 is configured to evaluate the speed of variation of the pressing pressure and to determine the profile of the sensed feedback generated as a function of the variation of the pressing pressure and as a function of the rate of variation of the pressing pressure for the predetermined duration.
Selon un autre exemple de réalisation, le module de retour sensitif 4 est configuré pour déterminer l'accélération de variation de la pression d'appui et pour déterminer le profil du retour sensitif généré en fonction de la variation de pression d'appui et en fonction de l'accélération de variation de la pression d'appui pendant la durée prédéterminée.  According to another exemplary embodiment, the sensory feedback module 4 is configured to determine the acceleration of variation of the pressing pressure and to determine the profile of the sensed feedback generated as a function of the variation of the pressing pressure and in function the acceleration of variation of the support pressure during the predetermined duration.
La correspondance entre le ressenti et l'appui est encore améliorée lorsque le profil du retour sensitif est basé sur un couple de paramètres représentatifs de la variation de la pression d'appui. Le profil du retour sensitif est par exemple basé sur la variation de pression d'appui et sur la vitesse de la variation de la pression d'appui ou sur la variation de pression d'appui et sur l'accélération de la variation de la pression d'appui. Un appui sec et fort provoque ainsi un retour sensitif distinct d'un retour lent et faible ou d'un appui sec et faible ou encore d'un appui lent et fort.  The correspondence between felt and support is further improved when the sensory feedback profile is based on a pair of parameters representative of the variation of the pressure of support. The profile of the sensory feedback is for example based on the variation of the pressure of support and the speed of the variation of the pressure of support or on the variation of pressure of support and on the acceleration of the variation of the pressure support. A dry and strong support thus causes a sensory return distinct from a slow and weak return or a weak and weak support or a slow and strong support.
Le retour sensitif dont le profil est fonction de la variation de la pression d'appui mesurée sur la surface tactile 2 pendant la durée prédéterminée dt est par exemple généré après le franchissement d'un seuil. Ce seuil permettant le déclenchement de la génération du retour sensitif peut être un seuil de variation de la pression d'appui, de vitesse ou d'accélération de variations de pression d'appui ou encore par exemple de variation de l'aire de contact du doigt.  The sensory feedback whose profile is a function of the variation of the bearing pressure measured on the touch surface 2 during the predetermined time dt is for example generated after crossing a threshold. This threshold allowing the triggering of the generation of the sensory feedback can be a threshold of variation of the support pressure, of speed or of acceleration of variations of pressing pressure or else of variation of the contact area of the finger.
Le retour sensitif comporte par exemple au moins deux composantes choisies parmi une vibration, un son et une représentation visuelle. Un retour sensitif comportant au moins deux composantes de modalités sensorielles différentes, présente l'avantage que pour l'utilisateur, la présentation d'une des composantes va entraîner l'activation de l'autre. Par exemple, la présentation d'une amorce visuelle préalablement associée à une composante sonore, facilite le traitement perceptif de cibles sonores pour l'utilisateur, la simple présentation de la composante visuelle réactivant la composante sonore associée.  The sensory feedback comprises for example at least two components chosen from a vibration, a sound and a visual representation. A sensory feedback comprising at least two components of different sensory modalities, has the advantage that for the user, the presentation of one of the components will cause the activation of the other. For example, the presentation of a visual primer previously associated with a sound component, facilitates the perceptual processing of sound targets for the user, the mere presentation of the visual component reactivating the associated sound component.
En outre, on peut prévoir de générer les différentes composantes du retour sensitif de manière qu'elles soient perçues avec un décalage dans le temps, par exemple en décalant dans le temps leur génération respective. Ainsi, les différentes composantes du retour sensitif ne sont pas nécessairement perçues simultanément. Par exemple, lorsque l'utilisateur cesse d'appuyer sur la surface tactile 2, on peut générer un changement d'état visuel perceptible presqu'immédiatement tandis que le son peut être généré par exemple avec un décalage par rapport au changement d'état visuel de manière à n'être perçu qu'après que le doigt ait quitté la surface tactile 2. Cette désynchronisation des perceptions des composantes du retour sensitif peut correspondre comme sur un bouton poussoir classique au délai nécessaire à la remontée de la touche enfoncée vers son état de repos et au bruit qui en découle. In addition, it can be provided to generate the various components of the sensory feedback so that they are perceived with a shift in time, for example by shifting in time their respective generation. Thus, the different components of sensory feedback are not necessarily perceived simultaneously. For example, when the user stops pressing on the touch surface 2, it is possible to generate a perceptible visual state change almost immediately while the sound can be generated for example with an offset by relative to the visual state change so that it is perceived only after the finger has left the tactile surface 2. This desynchronization of the perceptions of the components of the sensory feedback can correspond as on a conventional push button to the delay necessary for the ascent from the pressed key to its state of rest and the resulting noise.
Ainsi, contrairement à une situation dans laquelle un même retour sensitif serait généré à l'utilisateur alors même qui réaliserait un appui fort, moyen ou faible, le dispositif de contrôle 1 proposé améliore l'impression d'appui en faisant correspondre le profil du retour sensitif avec la variation de pression d'appui. Des retours sensitifs distincts sont générés selon que l'appui est fort, moyen ou faible.  Thus, unlike a situation in which the same sensory feedback would be generated to the user even if that would achieve a strong support, medium or low, the proposed control device 1 improves the impression of support by matching the profile of the return sensitive with the variation of pressure of support. Distinct sensory feedback is generated depending on whether the support is loud, medium or weak.
Les figures 2 et 3 illustrent un exemple de réalisation du procédé de commande du dispositif de contrôle dans lequel le retour sensitif comporte au moins un retour vibratoire simulant le « poussé-relâché » d'un bouton de type touche.  Figures 2 and 3 illustrate an embodiment of the control method of the control device wherein the sensory feedback comprises at least one vibratory feedback simulating the "pushed-released" of a button-type button.
Comme décrit précédemment, dans une première étape 101 , la pression d'appui (courbe 1) sur la surface tactile 2 est mesurée. Lorsqu'une variation de pression d'appui devient détectable, on mesure la pression d'appui sur une première durée prédéterminée dt1 , telle que de l'ordre de 20 millisecondes.  As previously described, in a first step 101, the bearing pressure (curve 1) on the touch surface 2 is measured. When a variation of pressing pressure becomes detectable, the pressing pressure is measured on a first predetermined duration dt1, such as of the order of 20 milliseconds.
Puis, on détermine le profil d'un retour sensitif d'appui R1 à générer en fonction de cette variation de pression d'appui mesurée, à partir par exemple d'une bibliothèque de retours sensitifs répertoriés en fonction de la pression d'appui ou encore, à partir d'une loi de commande préprogrammée en fonction de la pression d'appui.  Then, the profile of a sensory back-rest R1 to be generated is determined as a function of this variation of measured pressure, for example from a library of sensory returns indexed as a function of the bearing pressure or again, from a control law preprogrammed according to the support pressure.
Comme décrit précédemment, on prévoit par exemple pour le retour sensitif d'appui R1 de générer une première vibration pour une pression d'appui inférieure à 1 , 2N, une deuxième vibration pour une pression comprise entre 1 , 2N et 1 , 5N, et une troisième vibration pour une pression d'appui supérieure à 1 , 5N. On prévoit par exemple que la durée de la vibration varie avec la pression d'appui mesurée. Ainsi, une première vibration présente une durée inférieure à la durée de la deuxième vibration et la durée de la deuxième vibration est inférieure à l'amplitude de la troisième vibration.  As previously described, it is provided, for example, for the bearing feedback R1 to generate a first vibration for a bearing pressure of less than 1, 2N, a second vibration for a pressure of between 1, 2N and 1.5N, and a third vibration for a bearing pressure greater than 1.5N. For example, the duration of the vibration varies with the measured bearing pressure. Thus, a first vibration has a duration less than the duration of the second vibration and the duration of the second vibration is less than the amplitude of the third vibration.
La vibration du retour sensitif d'appui R1 dont le profil est fonction de la variation de la pression d'appui mesurée sur la surface tactile 2 pendant cette première durée prédéterminée dt1 (courbe 2) est par exemple générée après que la pression d'appui ait franchi un premier seuil de pression S1. Le retour sensitif d'appui R1 perçu par l'utilisateur peut alors être différent selon qu'il a appuyé fortement ou non sur la surface tactile 2.  The vibration of the sensing feedback R1 whose profile is a function of the variation of the bearing pressure measured on the touch surface 2 during this first predetermined time dt1 (curve 2) is generated, for example, after the bearing pressure has passed a first pressure threshold S1. The sensory feedback feedback R1 perceived by the user can then be different depending on whether he pressed strongly or not on the touch surface 2.
En outre, la détermination du retour sensitif d'appui R1 peut également être déterminée -l ien fonction d'un deuxième paramètre, tel que la vitesse de variation de pression d'appui ou l'accélération de variation de la pression d'appui. Ainsi, le retour sensitif d'appui R1 peut varier en fonction de la valeur de ce deuxième paramètre. In addition, the determination of the sensory feedback R1 can also be determined the function of a second parameter, such as the rate of variation of the pressure of support or the acceleration of variation of the pressing pressure. Thus, the sensory feedback R1 may vary depending on the value of this second parameter.
La vibration est par exemple produite par un signal de commande sinusoïdal envoyé à l'actionneur 3. La vibration ressentie s'étend sur la durée de vibration Dv (courbe 2), supérieure à la durée du signal de commande.  The vibration is for example produced by a sinusoidal control signal sent to the actuator 3. The vibration felt extends over the vibration duration Dv (curve 2), greater than the duration of the control signal.
Dans une deuxième étape 102, selon un premier exemple, on prévoit une durée de temporisation Da, au minimum de l'ordre de 20ms entre la génération des deux signaux de commande des retours sensitifs d'appui et de relâché, pendant laquelle aucun retour sensitif n'est généré. Ainsi, dans l'exemple, aucun signal de commande n'est envoyé à l'actionneur 3 après celui générant le retour sensitif d'appui R1 pendant une durée de temporisation Da de 20ms, soit une durée Da' d'environ 10ms à partir de la fin de la vibration de la surface tactile 2 du retour sensitif d'appui R1. On simule ainsi une sensation de butée d'enfoncement.  In a second step 102, according to a first example, there is provided a delay time Da, at least of the order of 20 ms between the generation of the two control signals of the sensory and relaxed feedbacks, during which no sensory feedback is generated. Thus, in the example, no control signal is sent to the actuator 3 after the one generating the sensing feedback R1 during a delay time Da of 20ms, a duration Da 'of about 10ms from the end of the vibration of the tactile surface 2 of the sensing feedback R1. This simulates a sensation of abutment abutment.
Selon un deuxième exemple, on génère un retour sensitif de butée après la génération du retour sensitif d'appui R1 , par exemple à la fin de la vibration de la surface tactile 2 du retour sensitif d'appui R1 et/ou après le franchissement d'un seuil de pression, pour simuler la sensation de butée d'enfoncement entre la génération des retours sensitifs d'appui et de relâché. Le retour sensitif de butée permet ainsi de reproduire la sensation mécanique perçue lorsqu'une touche enfoncée atteint sa butée mécanique.  According to a second example, a sensory abutment feedback is generated after the generation of the sensing back-rest R1, for example at the end of the vibration of the touch-sensitive surface 2 of the sensing back-rest R1 and / or after the crossing. a pressure threshold, to simulate the sensation of thrust abutment between the generation of sensory feedback and relaxation. The sensory feedback stop thus makes it possible to reproduce the perceived mechanical sensation when a depressed key reaches its mechanical stop.
On peut également prévoir de ne pas générer de retour sensitif tant que la pression d'appui mesurée cesse d'augmenter et décroît avec une variation de pression d'appui inférieure à un seuil de variation de pression prédéterminé après la génération du retour sensitif d'appui R1. En effet, lorsque le doigt de l'utilisateur reste appuyé sur la surface tactile 2 en exerçant une faible variation de pression, même après une durée de temporisation Da, l'utilisateur doit garder le contrôle du relâché et donc ne pas activer une fonction sans le vouloir si celle-ci est prise en compte au relâché et si la variation de pression d'appui est insuffisante.  It is also possible not to generate sensory feedback as long as the measured bearing pressure ceases to increase and decreases with a variation of bearing pressure lower than a predetermined pressure variation threshold after the generation of the sensory feedback. support R1. Indeed, when the user's finger remains pressed on the touch surface 2 exerting a small pressure variation, even after a delay time Da, the user must keep the release control and therefore not activate a function without the will if it is taken into account when released and if the variation of pressure of support is insufficient.
Simultanément, on poursuit la mesure de la pression d'appui sur la surface tactile 2.  Simultaneously, measurement of the bearing pressure on the touch surface 2 is continued.
Lorsque la pression d'appui cesse d'augmenter et décroît suffisamment, on mesure une diminution de la pression d'appui sur une deuxième durée prédéterminée dt2, pouvant être différente de la première durée prédéterminée dt1.  When the pressing pressure ceases to increase and decreases sufficiently, a decrease in the pressing pressure is measured over a second predetermined duration dt2, which may be different from the first predetermined duration dt1.
Puis, on détermine le profil du retour sensitif de relâché R2 à générer en fonction de cette pression d'appui mesurée, à partir par exemple d'une bibliothèque de retours sensitifs répertoriés en fonction de la pression d'appui ou encore, à partir d'une loi de commande préprogrammée en fonction de la pression d'appui. Then, the profile of the sensory feedback loop R2 to be generated is determined as a function of this measured bearing pressure, for example from a library of sensory returns indexed as a function of the pressing pressure, or again from 'a law of order preprogrammed according to the pressing pressure.
On prévoit par exemple de générer une vibration dont l'amplitude est fonction de la vitesse de la diminution de la pression d'appui. On peut prévoir en outre que la vibration du retour sensitif de relâché R2 présente une amplitude inférieure à l'amplitude de la vibration du retour sensitif d'appui R1 , ce qui permet de copier davantage l'effet d'un bouton existant.  For example, it is expected to generate a vibration whose amplitude is a function of the speed of the decrease of the bearing pressure. It can further be provided that the vibration of the relaxed return return R2 has a smaller amplitude than the amplitude of the vibration of the back rest sensing R1, which makes it possible to further copy the effect of an existing button.
Dans une troisième étape 103, la vibration du retour sensitif de relâché R2 dont le profil est fonction de la variation de la pression d'appui mesurée sur la surface tactile 2 pendant cette deuxième durée prédéterminée dt2 (courbe 2) est générée par exemple après que la baisse de pression d'appui ait franchi un deuxième seuil de pression S2.  In a third step 103, the vibration of the relaxed release feedback R2 whose profile is a function of the variation of the bearing pressure measured on the touch surface 2 during this second predetermined duration dt2 (curve 2) is generated for example after the pressure drop has passed a second pressure threshold S2.
En outre, le retour sensitif de butée ou l'écoulement de la durée de temporisation Da, ne conditionnent pas nécessairement l'émission du retour sensitif de relâché R2. En effet dans certains cas, un retour sensitif de relâché R2 peut être généré alors que le retour sensitif de butée n'a pas encore été émis ou avant l'écoulement de la durée de temporisation Da, par exemple parce que la pression d'appui a cessé d'augmenter et décru suffisamment avant la fin de la vibration de la surface tactile 2 du retour sensitif d'appui R1. En effet, sur un bouton mécanique, on peut activer et désactiver une fonction sans avoir atteint la butée mécanique du bouton.  In addition, the sensory stop feedback or the flow of the delay time Da do not necessarily condition the emission of the sensory feedback of release R2. Indeed, in some cases, a sensitive return of release R2 can be generated while the sensory stop return has not yet been sent or before the expiration of the delay time Da, for example because the support pressure has stopped increasing and decreases sufficiently before the end of the vibration of the tactile surface 2 of the sensory feedback R1. Indeed, on a mechanical button, you can activate and deactivate a function without having reached the mechanical stop of the button.
Selon un exemple de réalisation, la durée totale du retour sensitif comportant la première durée prédéterminée dt1 , la durée de vibration Dv, les durées des retours sensitifs d'appui et de relâché R1 , R2 et la durée de temporisation Da ou le retour sensitif de butée, est courte, c'est- à-dire inférieure à 200 ms et de préférence comprise entre 70 et 200ms, telle que comprise entre 110 et 140 ms. Les signaux courts sont en effet mieux perçus par l'utilisateur. La fréquence de la vibration de la surface tactile 2 est par exemple comprise entre 60 et 200Hz, telle que 120Hz.  According to an exemplary embodiment, the total duration of the sensory feedback including the first predetermined duration dt1, the duration of vibration Dv, the duration of the sensory feedback and rest periods R1, R2 and the delay time Da or the sensory feedback of stop, is short, that is to say less than 200 ms and preferably between 70 and 200 ms, such that between 110 and 140 ms. Short signals are indeed better perceived by the user. The frequency of the vibration of the touch surface 2 is for example between 60 and 200Hz, such as 120Hz.

Claims

REVENDICATIONS
1. Dispositif de contrôle pour véhicule automobile comportant : 1. Control device for a motor vehicle comprising:
une surface tactile (2) comportant un capteur de contact apte à mesurer une pression d'appui sur la surface tactile (2) pendant une durée prédéterminée (dt ; dt1 , dt2), et a touch surface (2) comprising a contact sensor capable of measuring a pressing pressure on the touch surface (2) for a predetermined duration (dt; dt1, dt2), and
un module de retour sensitif (4) configuré pour générer un retour sensitif en réponse à un contact de la surface tactile (2), a sensitive feedback module (4) configured to generate sensitive feedback in response to contact with the tactile surface (2),
caractérisé en ce que le module de retour sensitif (4) est configuré pour déterminer le profil du retour sensitif à générer en fonction de la variation de pression d'appui mesurée sur la surface tactile (2) pendant la durée prédéterminée (dt ; dt1 , dt2). characterized in that the sensitive feedback module (4) is configured to determine the profile of the sensitive feedback to be generated as a function of the variation in support pressure measured on the tactile surface (2) during the predetermined duration (dt; dt1, dt2).
2. Dispositif de contrôle selon la revendication précédente, caractérisé en ce que le module de retour sensitif (4) est configuré pour évaluer la vitesse de variation de la pression d'appui et pour déterminer le profil du retour sensitif généré en fonction de la variation de la pression d'appui et en fonction de la vitesse de variation de la pression d'appui pendant la durée prédéterminée (dt ; dt1 , dt2). 2. Control device according to the preceding claim, characterized in that the sensitive feedback module (4) is configured to evaluate the speed of variation of the support pressure and to determine the profile of the sensitive feedback generated as a function of the variation of the support pressure and as a function of the speed of variation of the support pressure during the predetermined duration (dt; dt1, dt2).
3. Dispositif de contrôle selon l'une des revendications précédentes, caractérisé en ce que le module de retour sensitif (4) est configuré pour déterminer l'accélération de variation de la pression d'appui et pour déterminer le profil du retour sensitif généré en fonction de la variation de la pression d'appui et en fonction de l'accélération de variation de la pression d'appui pendant la durée prédéterminée (dt ; dt1 , dt2). 3. Control device according to one of the preceding claims, characterized in that the sensitive feedback module (4) is configured to determine the acceleration of variation of the support pressure and to determine the profile of the sensitive feedback generated in function of the variation of the support pressure and as a function of the acceleration of variation of the support pressure during the predetermined duration (dt; dt1, dt2).
4. Dispositif de contrôle selon l'une des revendications précédentes, caractérisé en ce que le retour sensitif comporte au moins deux composantes choisies parmi une vibration, un son et une représentation visuelle. 4. Control device according to one of the preceding claims, characterized in that the sensory feedback comprises at least two components chosen from a vibration, a sound and a visual representation.
5. Dispositif de contrôle selon la revendication précédente, caractérisé en ce que les composantes du retour sensitif sont générées de manière à être perçues avec un décalage temporel. 5. Control device according to the preceding claim, characterized in that the components of the sensory feedback are generated so as to be perceived with a temporal shift.
6. Dispositif de contrôle selon l'une des revendications précédentes, caractérisé en ce que le module de retour sensitif (4) comporte une bibliothèque de retours sensitifs répertoriés au moins en fonction de la pression d'appui. 6. Control device according to one of the preceding claims, characterized in that the sensitive feedback module (4) comprises a library of sensitive feedback listed at least as a function of the support pressure.
7. Dispositif de contrôle selon l'une des revendications 1 à 5, caractérisé en ce que le module de retour sensitif (4) est configuré pour déterminer le profil du retour sensitif à partir d'une loi de commande préprogrammée au moins en fonction de la variation de la pression d'appui. 7. Control device according to one of claims 1 to 5, characterized in that the sensitive feedback module (4) is configured to determine the profile of the sensitive feedback from a pre-programmed control law at least as a function of the variation of the support pressure.
8. Procédé de commande d'un dispositif de contrôle pour véhicule automobile selon l'une des revendications précédentes dans lequel un retour sensitif est généré en réponse à un contact de la surface tactile (2) caractérisé en ce que le profil du retour sensitif généré est déterminé en fonction de la variation de la pression d'appui mesurée sur la surface tactile (2) pendant une durée prédéterminée (dt ; dt1 , dt2). 8. Method for controlling a control device for a motor vehicle according to one of the preceding claims in which sensitive feedback is generated in response to contact with the tactile surface (2) characterized in that the profile of the sensitive feedback generated is determined as a function of the variation in the support pressure measured on the tactile surface (2) for a predetermined duration (dt; dt1, dt2).
9. Procédé de commande selon la revendication précédente, caractérisé en ce qu'on détermine la vitesse de variation de la pression d'appui et en ce que le profil du retour sensitif généré est également déterminé en fonction de la vitesse de variation de la pression d'appui pendant la durée prédéterminée. 9. Control method according to the preceding claim, characterized in that the speed of variation of the support pressure is determined and in that the profile of the sensitive feedback generated is also determined as a function of the speed of variation of the pressure support for the predetermined duration.
10. Procédé de commande selon l'une des revendications 8 ou 9, caractérisé en ce qu'on détermine l'accélération de variation de la pression d'appui et en ce que le profil du retour sensitif généré est également déterminé en fonction de l'accélération de variation de la pression d'appui pendant la durée prédéterminée. 10. Control method according to one of claims 8 or 9, characterized in that the acceleration of variation of the support pressure is determined and in that the profile of the sensitive feedback generated is also determined as a function of the acceleration of variation of the support pressure during the predetermined duration.
1. Procédé de commande selon l'une des revendications 8 à 10, caractérisé en ce que : 1. Control method according to one of claims 8 to 10, characterized in that:
un premier retour sensitif est généré pour une variation de pression d'appui inférieure à 1 , 2N, a first sensitive feedback is generated for a variation in support pressure less than 1.2N,
un deuxième retour sensitif est généré pour une variation de pression d'appui comprise entre 1 , 2 N et 1 , 5N, et a second sensitive feedback is generated for a variation in support pressure between 1.2 N and 1.5 N, and
un troisième retour sensitif est généré pour une variation de pression d'appui supérieure à 1 , 5N, le premier, le deuxième et le troisième retour sensitifs étant distincts les uns des autres. a third sensitive feedback is generated for a variation in support pressure greater than 1.5N, the first, second and third sensitive feedback being distinct from each other.
12. Procédé de commande selon l'une des revendications 8 à 11 , caractérisé en ce qu'on modifie le profil d'un retour sensitif de type vibratoire en modifiant la valeur d'au moins un paramètre choisi parmi l'amplitude, la durée, l'accélération et la fréquence de la vibration. 12. Control method according to one of claims 8 to 11, characterized in that the profile of a sensitive feedback of the vibration type is modified by modifying the value of at least one parameter chosen from the amplitude, the duration , acceleration and frequency of the vibration.
13. Procédé de commande selon l'une des revendications 11 ou 12, caractérisé en ce que le premier, le deuxième et le troisième retour sensitifs sont des vibrations, au moins un paramètre choisi parmi l'amplitude, la durée et l'accélération, présente une valeur qui augmente avec l'augmentation de la variation de pression d'appui. 13. Control method according to one of claims 11 or 12, characterized in that the first, second and third sensitive feedback are vibrations, at least one parameter chosen from amplitude, duration and acceleration, presents a value which increases with the increase in the variation of support pressure.
14. Procédé de commande selon l'une des revendications 8 à 13, caractérisé en ce : 14. Control method according to one of claims 8 to 13, characterized in this:
on mesure une augmentation de la pression d'appui sur une durée prédéterminée (dt1) et on génère un retour sensitif d'appui (R1 ) dont le profil est fonction de la variation de la pression d'appui mesurée, - puis, lorsque la pression d'appui mesurée cesse d'augmenter et décroît, on mesure une diminution de la pression d'appui sur une durée prédéterminée (dt2) et on génère un retour sensitif de relâché (R2) dont le profil est fonction de la variation de la pression d'appui mesurée. we measure an increase in the support pressure over a predetermined duration (dt1) and we generate a sensitive support feedback (R1) whose profile is a function of the variation in the measured support pressure, - then, when the measured support pressure stops increasing and decreases, we measure a decrease in the support pressure over a predetermined duration (dt2) and we generate a sensitive release feedback (R2) whose profile is a function of the variation of the measured support pressure.
15. Procédé de commande selon la revendication précédente, caractérisé en ce qu'on prévoit une durée de temporisation (Da) pour laquelle on ne génère pas de retour sensitif après la génération du retour sensitif d'appui (R1). 15. Control method according to the preceding claim, characterized in that a time delay duration (Da) is provided for which no sensitive feedback is generated after the generation of the support sensitive feedback (R1).
16. Procédé de commande selon l'une des revendications 8 à 14, caractérisé en ce qu'on génère un retour sensitif de butée après la génération du retour sensitif d'appui (R1). 16. Control method according to one of claims 8 to 14, characterized in that a stop sensitive feedback is generated after the generation of the support sensitive feedback (R1).
17. Procédé de commande selon l'une des revendications 14 à 16, caractérisé en ce qu'on ne génère pas de retour sensitif tant que la pression d'appui mesurée cesse d'augmenter et décroît avec une variation de pression d'appui inférieure à un seuil de variation de pression prédéterminé après la génération du retour sensitif d'appui (R1).17. Control method according to one of claims 14 to 16, characterized in that no sensitive feedback is generated as long as the measured support pressure stops increasing and decreases with a lower support pressure variation at a predetermined pressure variation threshold after the generation of the sensitive support feedback (R1).
18. Procédé de commande selon l'une des revendications 8 à 17, caractérisé en ce que la durée prédéterminée (dt ; dt1 , dt2) pendant laquelle on mesure la variation de pression d'appui est inférieure à 30 millisecondes. 18. Control method according to one of claims 8 to 17, characterized in that the predetermined duration (dt; dt1, dt2) during which the variation in support pressure is measured is less than 30 milliseconds.
EP14828180.1A 2013-12-19 2014-12-18 Control device for motor vehicle and control method Ceased EP3084570A1 (en)

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FR1303011A FR3015383B1 (en) 2013-12-19 2013-12-19 CONTROL DEVICE FOR MOTOR VEHICLE AND CONTROL METHOD
PCT/FR2014/000286 WO2015092163A1 (en) 2013-12-19 2014-12-18 Control device for motor vehicle and control method

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WO2015092163A1 (en) 2015-06-25
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