• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a device for detecting the intention of locking or unlocking a motor vehicle door by a user, integrated in a handle (10), consisting of a housing (B ') comprising a first portion (52), resiliently deformable about a predetermined axis (Y-Y '), with a contact area (50) with the handle, a printed circuit (80), a voltage source (Vcc), and a sensing element contact member (100) comprising: • a non-magnetic metal target (40), moving along the predetermined axis, • a coil (20), and a capacitor (C1), forming an oscillating circuit, • adjusting means (M1 ) of the frequency of said circuit, • a prestressed compressible element (30), located between the target and the coil, • transmission means (51) for a displacement of the first part on said target, • measuring means ( M2) of an inductance (L) of the coil, • means of comparing (M3) between the measured inductance and a predetermined inductance threshold value (Ls); • control means (60 ').
    公开号:FR3038642A1
    申请号:FR1556474
    申请日:2015-07-08
    公开日:2017-01-13
    发明作者:Mickael Guibbert；Gabriel Spick；Pascal Perrot
    申请人:Continental Automotive GmbH；Continental Automotive France SAS；
    IPC主号:
    专利说明:

    The invention relates to a device for detecting the presence of a user and a vehicle door handle comprising said device.
    Nowadays, the vehicle door handles are equipped with devices for detecting the presence of a user. The detection of the presence of a user coupled to the recognition of an electronic badge "free hand" remote access control, worn by this user, allows remote locking and unlocking of the opening of the vehicle. Thus, when the user wearing the corresponding electronic badge and identified by the vehicle wishes to unlock the vehicle, it approaches the handle or touches the door handle of the vehicle and the opening of the vehicle is then automatically unlocked. By approaching or pressing a specific point on the vehicle's door handle, called the "unlocking zone", the door (or alternatively all the doors) is (are) unlocked (unlocked) without further action by the user . Conversely, when the user, always wearing the necessary badge and identified by the vehicle, wants to lock his vehicle, he closes the door of his vehicle and he approaches or momentarily presses on another specific place of the handle, called "zone locking. This action automatically locks the opening of the vehicle.
    These presence detection devices generally comprise two capacitive sensors, in the form of two electrodes electrically connected to a printed circuit, integrated in the door handle each in a specific area of locking or unlocking. Generally, an electrode is dedicated to each zone, that is to say an electrode is dedicated to the detection of the approach and / or the contact of the user's hand in the locking zone and an electrode is dedicated detection of the approach and / or contact of the user's hand in the unlocking area.
    The presence detection device further comprises a radio frequency antenna, generally LF (abbreviation for "Low Frequency"). The detection device is connected to the electronic computer of the vehicle (ECU: abbreviation for "Electronic Control Unit") and sends it a presence detection signal. The electronic computer of the vehicle has, beforehand, identified the user as being authorized to access this vehicle, or alternatively, following the reception of this presence detection signal, he carries out this identification. For this purpose, it sends via the radiofrequency antenna, an identification request to the badge (or remote control) worn by the user. This badge sends in response, by RF (radio frequency) waves its identification code to the electronic computer of the vehicle. If the electronic computer recognizes the identification code as the one allowing access to the vehicle, it triggers the locking / unlocking of the door (or all the opening). If, on the other hand, the electronic computer has not received an identification code or if the identification code received is wrong, the locking or unlocking is not done.
    Such vehicles, therefore, are equipped with door handles comprising a detection device itself comprising a radiofrequency antenna, generally low frequency and two electrodes connected to a microcontroller, integrated in a printed circuit and supplied with voltage.
    For purely explanatory purposes, it will be considered here a detection device D comprising two electrodes, an electrode dedicated to the unlocking zone and an electrode dedicated to the locking zone, said two electrodes being connected to a printed circuit comprising a microcontroller, and an antenna LF. A prior art detection device D is described with reference to FIG. 1. FIG. 1 shows a door handle 10 of a motor vehicle (vehicle not shown) in which a presence detection device D is located. of a user. Said door handle 10 comprises a first outer surface S1 oriented towards the door P and a second outer surface S2, opposite to the first outer surface S1 and thus oriented on the side opposite the vehicle, more specifically towards the user (not shown ). This detection device D comprises a first unlocking electrode E2, one side of which is located near the first outer surface S1, and control means 60 and an antenna LF (not shown), one side of which is close to the second one. outer surface S2, a second locking electrode E1, one face of which is located near the second outer surface S2, and control means 60. The first and second electrodes E1, E2 are connected to the control means 60. These control means 60 measure the capacitance across each first and second electrode E1, E2 in order to detect the presence (the approach and / or the contact). of a user in the detection zones, that is to say in a locking zone Z1 or in an unlocking zone Z2 and consist, for example, of a microcontroller 60 integrated into a printed circuit 80. The antenna LF (not shown) is, for its part, connected to an on-board electronic computer on the vehicle (not shown) of the BCM type ("Body Controller Module" or "Chassis Control Module") which manages the identification requests issued by said LF antenna.
    However, this detection device D of the prior art has major drawbacks.
    In this case, the detection of the approach of a user by capacitive sensors (first and second electrode E1 and E2) is not robust and generates false detections.
    In particular, under certain environmental conditions, when the ambient air is humid, or when there is salt on the roads, a capacitive coupling is created between the detection zones (locking zone Z1 and unlocking zone Z2). and the metal parts of the vehicle, which prevents any detection of the presence of a user by the capacitive sensors.
    In addition, raindrops or snowflakes on the door handle increase the capacitance value measured by the capacitive sensors, triggering false detections.
    And finally, the detection by capacitive sensors is incompatible with handles coated with metallic paints or including chrome surfaces, the presence of metal in the handle creating a coupling with the detection zones and inhibiting the detection of presence of a user.
    If for some vehicles, false detections are not desired, for other vehicles, false detections are not tolerated. This is the case, vehicles equipped with folding handles, that is to say the case of handles for which the detection of the presence of the user controls the movement of a motorized handle, which when it is at rest is fully integrated into the door and when activated is deployed and protrudes outside the door. For this type of handle deployment or inadvertent retraction of the handle due to false detection by capacitive sensors may pinch the hand of the user. This is also the case for vehicles equipped with an electric assist opening, for which the unlocking detection is accompanied not only by the unlocking of the door but also by its opening. In this case, the false detections cause untimely openings of the door.
    And finally, false detections are not tolerable for vehicles equipped with the security function "Safe Lock", for which, the lock detection not only controls the locking of the vehicle from the outside but also the locking of the vehicle of the vehicle. inside (anti-theft device). In this case, false detections can cause the user to lock inside the vehicle.
    To overcome these drawbacks, it is known from the prior art to replace at least one of the capacitive sensors, for example the capacitive sensor dedicated to the locking of the vehicle, by a push button type mechanical switch, but the aesthetic appearance and the Ergonomics of a button on a handle are unsatisfactory for users. For example, the button is visible from the outside and is not suitable for folding handles where it is sought above all the discretion regarding the presence of the handle in the door.
    And pressing a push button is less comfortable for the user than automatic detection approaching his hand to the handle that requires no support.
    The present invention makes it possible to solve these drawbacks and proposes a device for detecting the intention of locking and / or unlocking a door handle of a motor vehicle that does not have the drawbacks of the prior art.
    In particular, the detection device according to the invention, allows a reliable and robust detection of the intention to unlock or lock the vehicle, not generating false detections and having a discreet aesthetic appearance and ergonomics allowing the maximum of comfort, safety and efficiency for the user. The invention proposes a device for detecting the intention of locking or unlocking a motor vehicle door by a user, said device being integrated into a handle, and consisting of a housing comprising: a sensor detection element; contact of a user's hand on the handle, • a printed circuit, • a voltage source, the device being remarkable in that the housing comprises a first, elastically deformable according to a predetermined axis, comprising a contact zone with the handle, and in that the contact-detecting element further comprises: a non-magnetic metal target capable of moving along the predetermined axis; a coil connected to a capacitor forming with said capacitor an oscillating circuit , having a resonance frequency of their own, means for adjusting the frequency of the oscillating circuit at a predetermined frequency, A prestressed compressible element, located between the nonmagnetic metallic target and the coil, means for transmitting a displacement of the first part of the housing on the nonmagnetic metallic target, means for measuring an inductance of the coil, Comparison means between the measured inductance and a predetermined inductance threshold value, in order to detect the intention to lock or unlock the door by the user; means for controlling the adjustment means; measurement and means of comparison.
    Advantageously, the zone of contact with the handle consists of a protuberance of the first part.
    Conveniently, the predetermined frequency is less than or equal to the resonant frequency of the coil.
    The means for measuring an inductance of the coil may comprise means for measuring the oscillation frequency of the coil.
    The means for adjusting the frequency of the oscillating circuit and the means for measuring the oscillation frequency can be included in a digital inductance converter.
    Preferably, the housing having a bottom and a cover comprising the first portion, said housing also comprises a second portion aligned with the first portion along the predetermined axis located in the bottom, and having a bearing zone against the handle.
    The bearing zone may consist of a local extra thickness of the bottom. The invention also relates to a door handle of a motor vehicle, comprising: • a device according to one of the characteristics listed above and • at least one elastically deformable zone aligned along the predetermined axis with the contact zone, of dimensions greater than or equal to the dimensions of the contact area.
    Finally, the invention applies to any motor vehicle comprising a device according to one of the characteristics listed above. Other features and advantages of the invention will appear on reading the following description and on examining the appended drawings in which: FIG. 1, explained above, schematically represents the detection device D according to the art 2, diagrammatically represents the detection device D 'according to the invention; FIG. 3 is a schematic representation of a sectional view along the Y-Y' axis of the detection device D 'of FIG. according to the invention. - Figure 4 shows schematically the adjustment means M1, the measuring means M2 and the comparison means M3 of the detection device D 'according to the invention.
    The detection device D 'according to the invention is illustrated in FIG.
    Said detection device D 'has the form of a housing integrated in the handle 10 and comprises, as in the prior art, a printed circuit 80 and at least one contact detection element of the user's hand on the handle and a source of tension.
    However, contrary to the prior art, in which the contact detection element consisted of a capacitive sensor (locking electrodes E1 or unlocking E2), the invention proposes that said contact detection element 100 comprises a inductive sensor, consisting inter alia of a nonmagnetic metal target 40 and a coil 20.
    More particularly, the housing B 'comprises a first portion 52', elastically deformable along a predetermined axis Y-Y ', comprising a contact zone 50 with the handle 10, and the detection element 100 comprises: • a non-magnetic metallic target 40, adapted to move along the predetermined axis Y-Y ', • a coil 20, aligned along the Y-Y' axis with the non-magnetic metal target 40, connected to a capacitor C1 (see FIG. with said capacitor C1, an oscillating "LC" circuit having a resonance frequency of its own, • adjusting means M1 (see FIG. 4) of the frequency of the oscillating circuit constituted by the coil 20 and the capacitor C1, to a predetermined frequency, • a compressible prestressed element 30, located between the target 40 and the coil 20, • transmission means 51 of a displacement of the first portion 52 on the nonmagnetic metal target 40, • measuring means M2 (see FIG. 4) an inductance of the coil 20, • comparison means M3 (cf. 4) between the measured inductance and a predetermined inductance threshold value, in order to detect the intention to lock or unlock the door by the user, • control means 60 ', adjustment means M1, measuring means M2 and comparison means M3.
    In this example, the detection element 100 is dedicated to the detection of the intention to lock, and replaces the capacitive locking detection sensor of the prior art, however the invention applies mutatis mutandis to the detection of the intention to unlock instead of the capacitive sensor unlocking detection of the prior art.
    The first portion 52 of the housing B 'is elastically deformable along the axis YY'. The housing B 'being integrated in the handle 10, said first portion 52 has a face located near the second outer surface S2 of the handle and is adapted to deform when the user presses (see arrow "A" at the 3) on a locking zone ΖΓ (see FIGS. 2 and 3) located on said second outer surface S2 the handle 10. For this purpose, said first part B2 is aligned with the locking zone Z1 'along the Y axis. -Y.
    The term elastically deformable means a first portion 52 which is: • made of an elastic material, for example Bayblend® T85MN, which has a Young's modulus of 200 MPa at 25 deg.C, • for example, thick e2 smaller than the thickness of the wall e3 of the housing B 'outside this first portion 52 (see Figure 3). For example e2 = 1 mm and e3 = 2 mm.
    The first portion 52 includes a contact zone 50 with the handle 10 which is aligned with the locking zone Z1 '. Preferably, the contact zone 50 is circular in shape.
    The dimensions of the contact zone 50 in a plane P perpendicular to the axis YY 'and parallel to the second external surface S2 of the handle 10 are defined for example according to the dimensions of a finger of the hand of the user.
    Preferably, the dimensions of the contact zone 50 are smaller than the dimensions of the locking zone Z1 '.
    In the embodiment illustrated in Figure 3, the housing B 'is made in two parts, and comprises a cover C facing the second surface S2, and a bottom B facing the first surface S1. The cover C locally comprises a protuberance (see FIG. 3) located at the top and in the middle according to the sectional view Y-Y 'of the cover C which defines the contact zone 50 with the handle 10.
    In a preferred embodiment of the invention, the handle 10 also comprises an elastically deformable zone located opposite the contact zone 50 of the housing B '. Conveniently, the elastically deformable zone is the locking zone Z1 'and is of dimensions at least greater than the dimensions of the contact zone 50.
    The elastically deformable zone of the handle 10 is made of a flexible material, for example in the same material as the first part 52 (for example in Bayblend®) and is of thickness e1 smaller than the thickness eO of the second surface external S2 of the handle 10, located around said elastically deformable zone.
    The nonmagnetic metal target 40 is able to move along the axis YY '. Said non-magnetic metallic target 40 is made of, for example, aluminum or any other non-magnetic metal. The nonmagnetic metal target 40 may be in the form of a cylinder.
    The coil 20 consists of a winding of copper wires for example, etched on the printed circuit board 80. Said coil 20 is electrically connected to a capacitor C1, and thus forms an oscillating "LC" circuit, and is also connected: the adjustment means M1 of the frequency of the oscillating circuit consisting of the coil 20 and the capacitor C1, • the measuring means M2 of the inductance of the coil 20, • the comparison means M3 between the measured inductance and a threshold value of inductance.
    Preferably the measuring means M2 of the inductance consist of means for measuring the oscillation frequency of the oscillating circuit consisting of the coil 20 and the capacitor C1, and are included, with the adjustment means M1 of the frequency ( for example an oscillator), in an inductance-to-digital converter 70 (see FIG.
    The M3 comparison means are in the form of software.
    The control means 60 'consist of a microcontroller 60' and the comparison means M3 are for example integrated in said microcontroller 60 ', supplied with voltage Vcc.
    The microcontroller 60 ', the inductance-to-digital converter 70, the coil 20 as well as the capacitor C1 are integrated in the printed circuit 80. The compressible prestressed element 30 is situated between the nonmagnetic metal target 40 and the coil 20, and consists of for example EPDM (Ethylene-Propylene-Diene-Monomer), more specifically a flexible foam with closed cells, very flexible, and resistant to the temperature range -40 deg.C to +85 deg.C. The compressible prestressed element 30 undergoes two successive prestressing, a first prestressing during its assembly in the housing B 'and then a second prestressing during the assembly of the housing B' in the handle 10.
    Being located between the nonmagnetic metal target 40 and the coil 20, once the housing B 'integrated in the handle 10, the thickness of said compressible prestress element 30, once compressed, defines an initial distance dO between the non-magnetic metal target 40 and the coil 20.
    In a preferred embodiment, the housing B 'also comprises in its bottom B, aligned with the first part 52 along the axis Y-Y', a second part 53 which is a bearing zone against the handle 10.
    Said second portion 53 is, for example, in the form of a local extra thickness of the bottom B of the housing B '.
    The transmission means 51 of a displacement of the first part 52 towards the nonmagnetic metal target 40 are in the form of two legs 51 extending the first part 52 along the Y-Y 'axis towards the non-magnetic metallic target 20. The transmission means 51 may also be in the form of a hollow cylinder connecting the first portion 52 to the nonmagnetic metal target 20 along the Y-axis Y '.
    When the user presses on the locking zone Z1 ', (see arrow A in FIG. 3), that is to say on the deformable zone of the handle 10, the said deformable zone and the first part 52 ( also elastically deformable) and which is in contact with the deformable zone via the contact zone 50, deform and cause displacement along the Y-Y 'axis of the transmission means 51. The transmission means 51 then press on the nonmagnetic metal target 40 and transmit the displacement to said nonmagnetic metal target 40. Said non-magnetic metal target 40 in turn moves and compresses the compressible prestressed element 30. By compressing itself, the compressible prestressed element 30 brings the said nonmagnetic metal target 40 of the coil 20. At the end of the support, the final distance d1 separating the nonmagnetic metal target 40 from the coil 20 is less than the distance initial dO, before the support.
    It should be noted that said elastically deformable zone located on the handle 10 thus makes it possible to lengthen the displacement of the nonmagnetic metal target 40 towards the coil 20, without impacting the overall rigidity of the handle 10.
    For example, considering a force of 10 N exerted by the user on the locking zone Z1 'of the handle 10, and an initial distance dO of about 1 mm between the nonmagnetic metal target 40 and the coil 20, the displacement of the nonmagnetic metal target 40, during the support, varies from 20 pm to 100 pm, and the final distance d1 between the nonmagnetic metal target 40 and the coil is then between 0.9 mm and 0.98 mm.
    This displacement of the initial distance d0 to the final distance d1, modifies the inductance of the coil 20. The variation of inductance of said coil 20 is therefore representative of the support of the user on the handle 10. The invention proposes to measure the inductance variation of the coil 20 to detect the support of the user on the handle 10 and thus to validate its intention to unlock the vehicle.
    For this purpose, in a first step, the control means 60 'control the oscillation frequency of the oscillating circuit via the frequency setting means M1.
    For example, the adjustment means M1 regulate the oscillation frequency of the oscillating circuit consisting of the coil 20 and the capacitor C1 close to its resonant frequency, for example at a value equal to 80% of its resonant frequency.
    During the support of the user on the locking zone Z1 'of the handle 10, the nonmagnetic metal target 40 approaches the coil 20, as explained above, which modifies the oscillation frequency of the oscillating circuit LC.
    The measuring means M2 measure for a predetermined duration d, a number of oscillations of the oscillating circuit and deduce the actual oscillation frequency of the oscillating circuit LC consisting of the coil 20 and the capacitor C1. By measuring the actual frequency of said oscillating circuit, the measuring means M2 deduce the inductance L of the coil 20.
    And so :
    The comparison means M3 compare the inductance L thus measured with a threshold inductance value Ls, representative of the support of the user on the handle 10. If the measured inductance is lower than the threshold inductance value, L <Ls, then there is support of the user on the handle 10 and validation of the intention to lock the vehicle.
    It should be noted that other measurement strategies are possible, the measurement of an equivalent resistance of the oscillating circuit can be carried out and compared with an equivalent resistance threshold value. In this case, if the measured value of the equivalent resistance is greater than the threshold value of the equivalent resistance, then there is support of the user on the handle 10 and validation of the intention to lock the vehicle.
    The detection device D 'according to the invention thus makes it possible to detect the intention of locking the vehicle reliably without the risk of false detection. Indeed, the inductive sensor is not sensitive to external disturbances, as is the capacitive sensor of the prior art.
    In addition, the compressible prestressing element, the first part of the casing (which is elastically deformable), and the elastically deformable part of the handle make it possible to lengthen the displacement of the nonmagnetic metal target with respect to the coil without harm neither the aesthetic appearance nor the ergonomics of the handle.
    Judiciously, the detection device D 'of the invention is designed to measure very small displacements of the target (20 μm to 100 μm), which are however representative of the support of the user on the locking zone to lock his vehicle.
    权利要求:
    Claims (9)
    [1" id="c-fr-0001]
    1. Device for detecting (D ') the intention of locking or unlocking a motor vehicle door by a user, said device (D') being integrated into a handle (10), and consisting of a housing (B ') comprising: • a contact sensing element (100) of a user's hand on the handle (10), • a printed circuit (80), • a voltage source (Vcc), the device characterized in that the housing (B ') comprises a first portion (52), elastically deformable about a predetermined axis (Y-Y'), comprising a contact zone (50) with the handle (10), and in that the contact sensing element (100) further comprises: • a nonmagnetic metal target (40), movable along the predetermined axis (Y-Y '), • a coil (20), connected to a capacitance (C1), forming with said capacitor (C1) an oscillating circuit having a resonance frequency of its own, Means (M1) for adjusting the frequency of the oscillating circuit at a predetermined frequency; a prestressed compressible element (30) situated between the nonmagnetic metal target (40) and the coil (20); 51) of a displacement of the first part (52) of the housing (B ') on the nonmagnetic metal target (40), • measuring means (M2) of an inductance (L) of the coil (20), Comparison means (M3) between the measured inductance (L) and a predetermined inductance threshold value (Ls), in order to detect the intention to lock or unlock the door by the user; controlling (60 ') adjusting means (M1), measuring means (M2) and comparing means (M3).
    [2" id="c-fr-0002]
    2. Device according to the preceding claim, characterized in that the contact zone (50) with the handle (10) consists of a protuberance of the first part (52).
    [3" id="c-fr-0003]
    3. Device according to any one of the preceding claims, characterized in that the predetermined frequency is less than or equal to the resonance frequency of the coil (20).
    [4" id="c-fr-0004]
    4. Device according to any one of the preceding claims, characterized in that the measuring means (M2) of an inductance (L) of the coil (20), comprise means for measuring the oscillation frequency of the coil (20).
    [5" id="c-fr-0005]
    5. Device according to the preceding claim, characterized in that the adjusting means (M1) of the frequency of the oscillating circuit and the measuring means (M2) of the oscillation frequency are included in a digital inductance converter (70).
    [6" id="c-fr-0006]
    6. Device according to any one of the preceding claims, characterized in that the housing (B ') having a bottom (B) and a cover (C) comprising the first portion (52), said housing (B') comprises a second portion (53) aligned with the first portion (52) along the predetermined axis (Y-Y '), located in the bottom (B) and having a bearing zone against the handle (10).
    [7" id="c-fr-0007]
    7. Device according to the preceding claim, characterized in that the bearing zone consists of a local extra thickness of the bottom (B).
    [8" id="c-fr-0008]
    8. Door handle (10) of a motor vehicle door, characterized in that it comprises: • a device (D ') according to any one of the preceding claims and • at least one elastically deformable zone (Z1') aligned according to l predetermined axis (Y-Y ') with the contact zone (50) of dimensions greater than or equal to the dimensions of the contact zone (50).
    [9" id="c-fr-0009]
    9. Motor vehicle comprising a device (D ') according to any one of claims 1 to 7.
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    同族专利:
    公开号 | 公开日
    US10428562B2|2019-10-01|
    US20170016255A1|2017-01-19|
    CN106338772B|2018-06-01|
    FR3038642B1|2017-07-14|
    KR20170007127A|2017-01-18|
    CN106338772A|2017-01-18|
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    法律状态:
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    2017-01-13| PLSC| Publication of the preliminary search report|Effective date: 20170113 |
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    2018-07-25| PLFP| Fee payment|Year of fee payment: 4 |
    2020-07-21| PLFP| Fee payment|Year of fee payment: 6 |
    2021-04-16| TP| Transmission of property|Owner name: CONTINENTAL AUTOMOTIVE FRANCE, FR Effective date: 20210309 Owner name: CONTINENTAL AUTOMOTIVE GMBH, DE Effective date: 20210309 |
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    2022-02-11| CA| Change of address|Effective date: 20220103 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1556474A|FR3038642B1|2015-07-08|2015-07-08|DEVICE FOR DETECTING THE INTENTION TO LOCK OR UNLOCK A VEHICLE OF A MOTOR VEHICLE BY A USER|FR1556474A| FR3038642B1|2015-07-08|2015-07-08|DEVICE FOR DETECTING THE INTENTION TO LOCK OR UNLOCK A VEHICLE OF A MOTOR VEHICLE BY A USER|
    KR1020160083013A| KR20170007127A|2015-07-08|2016-06-30|Device for detecting a user's intention to lock or unlock a motor vehicle door|
    US15/198,018| US10428562B2|2015-07-08|2016-06-30|Device for detecting a user's intention to lock or unlock a motor vehicle door|
    CN201610530943.4A| CN106338772B|2015-07-08|2016-07-07|For detecting the equipment of the intention of user's locking or unlock motor vehicle door|
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