EP2356302A1 - Closing-in sensor for locking/unlocking a door leaf - Google Patents

Closing-in sensor for locking/unlocking a door leaf

Info

Publication number
EP2356302A1
EP2356302A1 EP09809341A EP09809341A EP2356302A1 EP 2356302 A1 EP2356302 A1 EP 2356302A1 EP 09809341 A EP09809341 A EP 09809341A EP 09809341 A EP09809341 A EP 09809341A EP 2356302 A1 EP2356302 A1 EP 2356302A1
Authority
EP
European Patent Office
Prior art keywords
sensor according
shielding element
sensor
handle
printed circuit
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.)
Withdrawn
Application number
EP09809341A
Other languages
German (de)
French (fr)
Inventor
Jean-François Leon
Jean-Michel Tessier
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.)
Valeo Comfort and Driving Assistance SAS
Original Assignee
Valeo Securite Habitacle SAS
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 Valeo Securite Habitacle SAS filed Critical Valeo Securite Habitacle SAS
Publication of EP2356302A1 publication Critical patent/EP2356302A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/54—Electrical circuits
    • E05B81/64—Monitoring or sensing, e.g. by using switches or sensors
    • E05B81/76—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles
    • E05B81/78—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles as part of a hands-free locking or unlocking operation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/54—Electrical circuits
    • E05B81/64—Monitoring or sensing, e.g. by using switches or sensors
    • E05B81/76—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles
    • E05B81/77—Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles comprising sensors detecting the presence of the hand of a user
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K2017/9602—Touch switches characterised by the type or shape of the sensing electrodes
    • H03K2017/9604—Touch switches characterised by the type or shape of the sensing electrodes characterised by the number of electrodes
    • H03K2017/9606—Touch switches characterised by the type or shape of the sensing electrodes characterised by the number of electrodes using one electrode only per touch switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960755—Constructional details of capacitive touch and proximity switches
    • H03K2217/96078—Sensor being a wire or a strip, e.g. used in automobile door handles or bumpers

Definitions

  • the present invention relates to an approach, presence or detection sensor for locking / unlocking an opening, in particular for a vehicle.
  • the invention relates to a capacitive type approach sensor in particular, but not exclusively, intended to be integrated in a handle of a vehicle door.
  • This type of sensor allows to design “hands-free” locking / unlocking an opening based on the detection of the hand of a user, for example, in the vicinity of the handle.
  • Said detection is carried out by means of a measuring electrode coupled to a reference electrode so as to detect a variation when approaching the hand. This variation then initiates a communication between a recognition device located on the vehicle and a portable identifier worn by the user, so as to allow locking / unlocking of the door in case of authentication of an authorized identifier.
  • the detection can also be performed with a prior authentication of the vehicle interrogating at regular intervals the authorized identifiers.
  • the capacitive approach sensor is disposed within the handles to create a localized electric field.
  • the current problem with this type of sensor is that it forms a fairly wide detection zone around the handle causing undesired detections. Indeed, the electric field formed by its electrodes exceeds the desired detection zones, and in this case, towards the outside of the handles thus generating triggers locking / unlocking the unsolicited opening.
  • the present invention aims to solve this problem by providing a directional sensor to obtain a reliable and limited variation detection area in a defined space to avoid any spurious detections.
  • the present invention reduces the space requirement of the detection system and therefore the handle.
  • the present invention makes it possible to reduce the cost of manufacturing such handles comprising such an approach sensor as well as to facilitate their assembly.
  • the present invention makes it possible to obtain a symmetrical detection in the vertical plane with respect to the opening thus making it possible to facilitate the production of the handles comprising such a sensor.
  • the subject of the invention is a capacitive approach sensor intended to be integrated in an opening handle, in particular for a vehicle with a view to its locking / unlocking comprising at least one electrode formed on a printed circuit, so creating a presence detection area of a user, characterized in that it comprises at least one metal shielding element formed on said printed circuit.
  • said shielding element forms one of the faces of the printed circuit.
  • said shielding element extends longitudinally and parallel over the entire length of said at least one electrode and is made of conductive type material.
  • said shielding element has a perforated structure that can be in the form of a conductive mesh.
  • said metal shielding element is made of copper.
  • said shielding element is referenced to electric potential or floating.
  • said printed circuit may have on one of its faces, a reference electrode surrounded by a measurement electrode and on its other side, a metal shielding element.
  • the senor according to the invention comprises asymmetrical detection means in the horizontal plane and symmetrical in the vertical plane, with respect to said opening.
  • FIG. 1 is a partial schematic view of the outside of an opening of a vehicle
  • FIG. 2 is a top view of a handle and the electric field generated by its sensor according to the prior art
  • FIG. 3 is a perpendicular sectional view of the sensor according to the invention.
  • FIG. 4 is a perspective view of the sensor according to the invention.
  • FIG. 5 is a sectional view of the electric field generated by the sensor according to the invention.
  • Figure 6 is a top view of a handle and the electric field generated by the sensor according to the invention.
  • Figure 1 is a partial schematic view of the outside of an opening of a vehicle.
  • Figure 1 schematically illustrates a handle 1, type of access "hands-free" of a vehicle, formed of a gripping portion 2 and a fixed portion 3 relative to an opening 4, such as a door. This figure also shows a presence detection zone 5 of a user.
  • a directional capacitive approach sensor 6 it is intended, before overmoulding or constituting the final handle, to integrate a directional capacitive approach sensor 6 according to the present invention to allow the detection of all or part of a hand or any other object belonging to a user. in the desired detection zone 5.
  • Said sensor enables detection by coupling at least one measuring electrode 7 and at least one reference electrode 9, formed on a printed circuit board 8.
  • said reference electrode may be of the active or passive type.
  • said reference electrode is an excitation electrode, which applies or pulses at regular intervals excitation to the electric field.
  • the capacitive sensor that is integrated in the handle has only one electrode.
  • the electrode is then a reference electrode or a measurement electrode.
  • the second electrode present out of the handle for example, is a part of the bodywork or the whole bodywork; said element or said assembly being grounded preferentially.
  • the surrounding ground to the vehicle can also be used in capacitive sensing, by its grounded electrode behavior.
  • the electric field variations due to the presence of the hand are measured between the electrode disposed in the handle and the electrode constituted by the body and / or the ground.
  • the detection zone 5 of the electrodes 7 and 9 of the capacitive approach sensor 6 must allow detection at the inner part of said handle 1.
  • the internal part of the handle 1 corresponds to the lateral part of the the handle most in contact with the opening 4 of the vehicle.
  • said detection zone 5 is located opposite and parallel to said opening, so as to detect any detection in the lower and upper neighborhoods of the inner portion of the handle 1 to lock / unlock said opening.
  • the face of the capacitive approach sensor 6 comprising said electrodes is disposed at the inner part of the handles 1 and facing said opening, in order to create an electric field located in said desired detection zone 5.
  • Figure 2 is a top view of a handle and the electric field generated by its sensor, according to the prior art.
  • This figure shows levels of simulated electric field lines ⁇ in the case where the handle comprises an approach sensor according to the prior art.
  • Said electric field generated by the electrodes included in the handle of the vehicle protrudes or protrudes asymmetrically from the handle towards its external part, corresponding to the lateral part of the handle least in contact with the opening of the vehicle, which can lead to undesired detection.
  • Figures 3 and 4 respectively show a perpendicular sectional view and a perspective view of the sensor according to the invention.
  • the present invention overcomes the drawbacks of the prior art by proposing to deposit or form at least one shielding element or metal screen directly on the printed circuit board 8, of the "PCB" type, for example.
  • the shielding element 10 is fixed on one of the faces of the printed circuit 8.
  • said shielding element 10 can form one of the faces of said printed circuit.
  • said metal shield element directly on the upper face of the printed circuit board 8 and to place on its lower face said electrodes 7 and 9.
  • said sensor is integrated in said handle of so that it is arranged opposite said opening.
  • the printed circuit 8 has on one of its faces, a reference electrode 9 surrounded or taken in sandwiched by a measuring electrode 7 and on its other side, a metallic shielding element 10.
  • said shielding element is associated or deposited or implanted on the printed circuit board 8.
  • said shielding element is not held offset or spaced with respect to said printed circuit, or connected indirectly via a support to said printed circuit.
  • This metallic shielding element is made of conductive material, such as copper, zinc, gold, silver and any other conductive element or conductive composition of a type known per se.
  • this metallic shield element has a perforated structure, textured or in the form of a conductive mesh.
  • said shielding element extends longitudinally and parallel over the entire length of at least one electrode.
  • Said shielding element and said electrodes have specific dimensions and adapted to those of the desired final handle in order to maximize the detection area along the length of the inner handle part as well as on its lower and upper parts.
  • FIGS. 5 and 6 respectively illustrate a sectional view of the electric field generated by the sensor according to the invention and a view from above of a handle and the electric field generated by the sensor according to the invention.
  • Said sensor 6 makes it possible to obtain an asymmetrical detection in the horizontal plane with respect to the opening, thus generating an optimal detection zone of reliable, precise and limited variation of capacity to this predefined space thus making it possible to avoid any parasitic detections and to affect its sensitivity in said area.
  • the senor 6 according to the invention also makes it possible to obtain a symmetrical detection in the vertical plane with respect to the opening, making it possible to produce identical left and right handles thus reducing production costs and facilitating assembly.
  • the user who wishes that its opening locks or unlocks approaches, all or part of a hand in the vicinity of the lower, upper or inner parts of the handle.
  • the authentication is carried out beforehand or following the detection by said sensor.
  • Said sensor according to the invention thus offers a limited detection zone in a predefined space allowing a locking / unlocking of the sash only when these triggers are desired.

Abstract

The invention relates to a closing-in or presence or detection capacitive sensor (6) for locking/unlocking a door leaf (4), in particular for a vehicle. More precisely, the closing-in capacitive sensor is to be integrated into the handle (1) of a door leaf for locking/unlocking the same. The sensor includes at least one electrode and at least one metal shielding member (10) formed on a printed circuit (8) so as to create a detection area (5) for detecting the presence of a user.

Description

CAPTEUR D'APPROCHE POUR LE VERROUILLAGE / DEVERROUILLAGE D'UN OUVRANT APPROACH SENSOR FOR LOCKING / UNLOCKING AN OPENER
La présente invention concerne un capteur d'approche, de présence ou de détection pour le verrouillage/déverrouillage d'un ouvrant, notamment pour un véhicule.The present invention relates to an approach, presence or detection sensor for locking / unlocking an opening, in particular for a vehicle.
Plus précisément, l'invention concerne un capteur d'approche de type capacitif en particulier, mais non exclusivement, destiné à être intégré dans une poignée d'un ouvrant de véhicule.More specifically, the invention relates to a capacitive type approach sensor in particular, but not exclusively, intended to be integrated in a handle of a vehicle door.
Ce type de capteur permet de concevoir des systèmes « mains libres » de verrouillage/déverrouillage d'un ouvrant basés sur la détection de la main d'un utilisateur, par exemple, au voisinage de la poignée.This type of sensor allows to design "hands-free" locking / unlocking an opening based on the detection of the hand of a user, for example, in the vicinity of the handle.
Ladite détection est réalisée au moyen une électrode de mesure couplée à une électrode de référence de manière à pouvoir déceler une variation à l'approche de la main. Cette variation initie ensuite une communication entre un dispositif de reconnaissance situé sur le véhicule et un identifiant portatif porté par l'utilisateur, de manière à permettre un verrouillage/déverrouillage de l'ouvrant qu'en cas d'authentification d'un identifiant autorisé. Selon un autre système de type main libre, la détection peut également être réalisée avec une authentification préalable du véhicule interrogeant à intervalles réguliers les identifiants autorisés.Said detection is carried out by means of a measuring electrode coupled to a reference electrode so as to detect a variation when approaching the hand. This variation then initiates a communication between a recognition device located on the vehicle and a portable identifier worn by the user, so as to allow locking / unlocking of the door in case of authentication of an authorized identifier. According to another free hand system, the detection can also be performed with a prior authentication of the vehicle interrogating at regular intervals the authorized identifiers.
Généralement, le capteur d'approche capacitif est disposé à l'intérieur des poignées afin de créer un champ électrique localisé. Le problème actuel de ce type de capteur est qu'il forme une zone de détection assez étendue autour de la poignée provoquant des détections non souhaitées. En effet, le champ électrique formé par ses électrodes dépasse les zones de détections désirées, et en l'occurrence, vers l'extérieur des poignées engendrant ainsi des déclenchements du verrouillage/déverrouillage de l'ouvrant non sollicités. De plus, il a été constaté une dissymétrie du champ électrique, dans le plan vertical par rapport à l'ouvrant, entraînant ainsi une dissymétrie de fonctionnement entre une poignée droite et gauche, par exemple.Typically, the capacitive approach sensor is disposed within the handles to create a localized electric field. The current problem with this type of sensor is that it forms a fairly wide detection zone around the handle causing undesired detections. Indeed, the electric field formed by its electrodes exceeds the desired detection zones, and in this case, towards the outside of the handles thus generating triggers locking / unlocking the unsolicited opening. In addition, it has been found an asymmetry of the electric field, in the vertical plane relative to the opening, thus causing a dissymmetry of operation between a right and left handle, for example.
C'est pourquoi il a déjà été proposé, selon la demande de brevet européenne n°EP1384845, de doter les électrodes capacitives d'un élément écran relié à la masse. Cet élément écran est placé sur une face externe du boîtier de détection et s'étend en regard d'au moins une électrode.That is why it has already been proposed, according to European Patent Application No. EP1384845, to provide the capacitive electrodes with a screen element connected to ground. This screen element is placed on an outer face of the detection box and extends facing at least one electrode.
Selon un second état de l'art antérieur, et notamment selon la demande de brevet japonaise n°JP2004169426, il est divulgué un élément écran maintenu espacé de manière parallèle à un circuit imprimé via un support.According to a second state of the prior art, and in particular according to Japanese Patent Application No. JP2004169426, there is disclosed a screen element maintained spaced parallel to a printed circuit via a support.
Toutefois, dans les capteurs susmentionnés aucun ne permet de fournir un capteur capacitif directif et précis pour le verrouillage/déverrouillage d'un ouvrant d'un véhicule.However, in the above-mentioned sensors none makes it possible to provide a directional and precise capacitive sensor for locking / unlocking an opening of a vehicle.
La présente invention a pour but de résoudre ce problème en fournissant un capteur directif permettant d'obtenir une zone de détection de variation fiable et limitée dans un espace défini permettant d'éviter toutes détections parasites. De plus, la présente invention permet de réduire l'espace d'encombrement du système de détection et donc de la poignée.The present invention aims to solve this problem by providing a directional sensor to obtain a reliable and limited variation detection area in a defined space to avoid any spurious detections. In addition, the present invention reduces the space requirement of the detection system and therefore the handle.
De surcroît, la présente invention permet de réduire le coût de fabrication de telles poignées comportant un tel capteur d'approche ainsi que de faciliter leur montage.In addition, the present invention makes it possible to reduce the cost of manufacturing such handles comprising such an approach sensor as well as to facilitate their assembly.
Favorablement, la présente invention permet d'obtenir une détection symétrique dans le plan vertical par rapport à l'ouvrant permettant ainsi de faciliter la production des poignées comportant de tel capteur.Favorably, the present invention makes it possible to obtain a symmetrical detection in the vertical plane with respect to the opening thus making it possible to facilitate the production of the handles comprising such a sensor.
A cette fin, l'invention a pour objet un capteur d'approche capacitif destiné à être intégré dans une poignée d'ouvrant, notamment pour véhicule en vue de son verrouillage/déverrouillage comportant au moins une électrode formée sur un circuit imprimé, de manière à créer une zone de détection de présence d'un utilisateur, caractérisé en ce qu'il comporte au moins un élément de blindage métallique formé sur ledit circuit imprimé.To this end, the subject of the invention is a capacitive approach sensor intended to be integrated in an opening handle, in particular for a vehicle with a view to its locking / unlocking comprising at least one electrode formed on a printed circuit, so creating a presence detection area of a user, characterized in that it comprises at least one metal shielding element formed on said printed circuit.
Avantageusement, ledit élément de blindage forme une des faces du circuit imprimé.Advantageously, said shielding element forms one of the faces of the printed circuit.
Plus précisément, ledit élément de blindage s'étend longitudinalement et parallèlement sur toute la longueur de ladite au moins une électrode et est constitué de matériau de type conducteur.More specifically, said shielding element extends longitudinally and parallel over the entire length of said at least one electrode and is made of conductive type material.
De manière alternative, ledit élément de blindage présente une structure ajourée pouvant être sous la forme d'un treillis conducteur. De préférence, ledit élément de blindage métallique est constitué de cuivre.Alternatively, said shielding element has a perforated structure that can be in the form of a conductive mesh. Preferably, said metal shielding element is made of copper.
Avantageusement, ledit élément de blindage est référencé à potentiel électrique ou flottant.Advantageously, said shielding element is referenced to electric potential or floating.
De préférence, ledit circuit imprimé peut présenter sur une de ses faces, une électrode de référence entourée par une électrode de mesures et sur son autre face, un élément de blindage métallique.Preferably, said printed circuit may have on one of its faces, a reference electrode surrounded by a measurement electrode and on its other side, a metal shielding element.
De manière avantageuse, le capteur selon l'invention comprend des moyens de détection dissymétrique dans le plan horizontal et symétrique dans le plan vertical, par rapport audit ouvrant.Advantageously, the sensor according to the invention comprises asymmetrical detection means in the horizontal plane and symmetrical in the vertical plane, with respect to said opening.
D'autres caractéristiques et avantages de l'invention ressortiront au cours de la description suivante d'un mode de réalisation du capteur d'approche donné à titre d'exemple en référence aux dessins annexés sur lesquels :Other characteristics and advantages of the invention will emerge during the following description of an embodiment of the approach sensor given by way of example with reference to the appended drawings in which:
- la figure 1 est une vue schématique partielle de l'extérieur d'un ouvrant d'un véhicule ;- Figure 1 is a partial schematic view of the outside of an opening of a vehicle;
- la figure 2 est une vue de dessus d'une poignée et du champ électrique généré par son capteur selon l'art antérieur ;- Figure 2 is a top view of a handle and the electric field generated by its sensor according to the prior art;
- la figure 3 est une vue en coupe perpendiculaire du capteur selon l'invention ;- Figure 3 is a perpendicular sectional view of the sensor according to the invention;
- la figure 4 est une vue en perspective du capteur selon l'invention ;FIG. 4 is a perspective view of the sensor according to the invention;
- la figure 5 est une vue en coupe du champ électrique généré par le capteur selon l'invention ;FIG. 5 is a sectional view of the electric field generated by the sensor according to the invention;
- la figure 6 est une vue de dessus d'une poignée et du champ électrique généré par le capteur selon l'invention. La figure 1 est une vue schématique partielle de l'extérieur d'un ouvrant d'un véhicule.- Figure 6 is a top view of a handle and the electric field generated by the sensor according to the invention. Figure 1 is a partial schematic view of the outside of an opening of a vehicle.
La figure 1 illustre schématiquement une poignée 1 , de type d'accès « mains libres » d'un véhicule, formée d'une partie de préhension 2 et d'une partie fixe 3 par rapport à un ouvrant 4, tel une portière. Cette figure montre également une zone de détection 5 de présence d'un utilisateur.Figure 1 schematically illustrates a handle 1, type of access "hands-free" of a vehicle, formed of a gripping portion 2 and a fixed portion 3 relative to an opening 4, such as a door. This figure also shows a presence detection zone 5 of a user.
Il est prévu, avant de surmouler ou de constituer la poignée finale, d'intégrer un capteur d'approche capacitif directif 6 selon la présente invention afin de permettre la détection de toute ou partie d'une main ou tout autre objet appartenant à un utilisateur dans la zone de détection 5 souhaitée.It is intended, before overmoulding or constituting the final handle, to integrate a directional capacitive approach sensor 6 according to the present invention to allow the detection of all or part of a hand or any other object belonging to a user. in the desired detection zone 5.
Ledit capteur permet une détection grâce au couplage d'au moins une électrode de mesure 7 et d'au moins une électrode de référence 9, formées sur un circuit imprimé 8.Said sensor enables detection by coupling at least one measuring electrode 7 and at least one reference electrode 9, formed on a printed circuit board 8.
De manière plus précise, ladite électrode de référence peut être de type actif ou passif.More specifically, said reference electrode may be of the active or passive type.
De préférence, ladite électrode de référence est une électrode d'excitation, qui applique ou impulse à intervalles réguliers une excitation au champ électrique.Preferably, said reference electrode is an excitation electrode, which applies or pulses at regular intervals excitation to the electric field.
Dans un mode de réalisation de l'invention, le capteur capacitif qui est intégré dans la poignée ne comporte qu'une seule électrode. L'électrode est alors une électrode de référence ou une électrode de mesure. La seconde électrode présente hors de la poignée, est par exemple, un élément de la carrosserie ou l'ensemble de la carrosserie ; ledit élément ou ledit ensemble étant relié à la terre préférentiellement. Le sol environnant au véhicule peut également être utilisé dans la détection capacitive, par son comportement en électrode mise à la terre. Dans ces différents modes de réalisation, les variations de champ électrique dues à la présence de la main sont mesurées entre l'électrode disposée dans la poignée et l'électrode constituée par la carrosserie et/ou le sol.In one embodiment of the invention, the capacitive sensor that is integrated in the handle has only one electrode. The electrode is then a reference electrode or a measurement electrode. The second electrode present out of the handle, for example, is a part of the bodywork or the whole bodywork; said element or said assembly being grounded preferentially. The surrounding ground to the vehicle can also be used in capacitive sensing, by its grounded electrode behavior. In these various embodiments, the electric field variations due to the presence of the hand are measured between the electrode disposed in the handle and the electrode constituted by the body and / or the ground.
La zone de détection 5 des électrodes 7 et 9 du capteur d'approche capacitif 6 doit permettre une détection au niveau de la partie interne de ladite poignée 1. En d'autres termes la partie interne de la poignée 1 correspond à la partie latérale de la poignée la plus en contact de l'ouvrant 4 du véhicule.The detection zone 5 of the electrodes 7 and 9 of the capacitive approach sensor 6 must allow detection at the inner part of said handle 1. In other words, the internal part of the handle 1 corresponds to the lateral part of the the handle most in contact with the opening 4 of the vehicle.
Plus précisément, ladite zone de détection 5 est située en regard et parallèlement audit ouvrant, de manière à déceler toute détection aux voisinages inférieur et supérieur de la partie interne de la poignée 1 en vue de verrouiller/déverrouiller ledit ouvrant.Specifically, said detection zone 5 is located opposite and parallel to said opening, so as to detect any detection in the lower and upper neighborhoods of the inner portion of the handle 1 to lock / unlock said opening.
Généralement la face du capteur d'approche capacitif 6 comprenant lesdites électrodes est disposée au niveau de la partie interne des poignées 1 et en regard dudit ouvrant, afin de créer un champ électrique localisé dans ladite zone de détection souhaitée 5.Generally the face of the capacitive approach sensor 6 comprising said electrodes is disposed at the inner part of the handles 1 and facing said opening, in order to create an electric field located in said desired detection zone 5.
La figure 2 est une vue de dessus d'une poignée et du champ électrique généré par son capteur, selon l'art antérieur. Cette figure montre des niveaux des lignes de champ électriques α simulés dans le cas où la poignée comprend un capteur d'approche selon l'art antérieur. Ledit champ électrique généré par les électrodes incluses dans la poignée du véhicule déborde ou dépasse de manière asymétrique de la poignée vers sa partie externe, correspondante à la partie latérale de la poignée la moins en contact de l'ouvrant du véhicule, pouvant conduire à des détection non souhaitées.Figure 2 is a top view of a handle and the electric field generated by its sensor, according to the prior art. This figure shows levels of simulated electric field lines α in the case where the handle comprises an approach sensor according to the prior art. Said electric field generated by the electrodes included in the handle of the vehicle protrudes or protrudes asymmetrically from the handle towards its external part, corresponding to the lateral part of the handle least in contact with the opening of the vehicle, which can lead to undesired detection.
La figure 3 et 4 illustrent respectivement une vue en coupe perpendiculaire et une vue en perspective du capteur selon l'invention.Figures 3 and 4 respectively show a perpendicular sectional view and a perspective view of the sensor according to the invention.
La présente invention remédie aux inconvénients de l'art antérieur en proposant de déposer ou former au moins un élément de blindage ou écran 10 métallique directement sur le circuit imprimé 8, de type « PCB », par exemple.The present invention overcomes the drawbacks of the prior art by proposing to deposit or form at least one shielding element or metal screen directly on the printed circuit board 8, of the "PCB" type, for example.
Plus précisément, l'élément de blindage 10 est fixé sur une des faces du circuit imprimé 8. Autrement dit ledit élément de blindage 10 peut former une des faces dudit circuit imprimé.More precisely, the shielding element 10 is fixed on one of the faces of the printed circuit 8. In other words, said shielding element 10 can form one of the faces of said printed circuit.
Comme illustré à la figure 3, il peut être prévu de maintenir solidairement ledit élément de blindage métallique directement sur la face supérieure du circuit imprimé 8 et de placer sur sa face inférieure lesdites électrodes 7 et 9. Ensuite ledit capteur est intégré dans ladite poignée de sorte que qu'il soit disposé en regard dudit ouvrant.As illustrated in FIG. 3, it can be provided to hold said metal shield element directly on the upper face of the printed circuit board 8 and to place on its lower face said electrodes 7 and 9. Next, said sensor is integrated in said handle of so that it is arranged opposite said opening.
Selon une autre configuration de l'invention, le circuit imprimé 8 présente sur une de ses faces, une électrode de référence 9 entourée ou prise en sandwich par une électrode de mesure 7 et sur son autre face, un élément de blindage métallique 10.According to another configuration of the invention, the printed circuit 8 has on one of its faces, a reference electrode 9 surrounded or taken in sandwiched by a measuring electrode 7 and on its other side, a metallic shielding element 10.
De manière plus précise, ledit élément de blindage est associé ou déposé ou implanté sur le circuit imprimé 8. En d'autres termes, ledit élément de blindage n'est pas maintenu déporté ou espacé par rapport audit circuit imprimé, ou relié de manière indirecte par l'intermédiaire d'un support audit circuit imprimé.More specifically, said shielding element is associated or deposited or implanted on the printed circuit board 8. In other words, said shielding element is not held offset or spaced with respect to said printed circuit, or connected indirectly via a support to said printed circuit.
Cet élément de blindage 10 métallique est constitué de matériau de type conducteur, tel que le cuivre, le zinc, l'or, l'argent et tout autre élément conducteur ou composition conductrice de type connu en soi.This metallic shielding element is made of conductive material, such as copper, zinc, gold, silver and any other conductive element or conductive composition of a type known per se.
Alternativement, cet élément de blindage 10 métallique présente une structure ajourée, texturée ou sous la forme de treillis conducteur.Alternatively, this metallic shield element has a perforated structure, textured or in the form of a conductive mesh.
Comme illustré à la figure 4, ledit élément de blindage s'étend longitudinalement et parallèlement sur toute la longueur d'au moins une électrode.As illustrated in FIG. 4, said shielding element extends longitudinally and parallel over the entire length of at least one electrode.
Ledit élément de blindage et lesdites électrodes possèdent des dimensions spécifiques et adaptées à celles de la poignée finale désirée en vue de maximiser la zone de détection sur la longueur de la partie interne poignée ainsi que sur ses parties inférieure et supérieure.Said shielding element and said electrodes have specific dimensions and adapted to those of the desired final handle in order to maximize the detection area along the length of the inner handle part as well as on its lower and upper parts.
De manière avantageuse, suivant l'épaisseur dudit circuit imprimé ledit élément de blindage est référencé à un potentiel flottant ou électrique tel que la masse ou à l'électrode de mesure. La figure 5 et 6 illustrent respectivement une vue en coupe du champ électrique généré par le capteur selon l'invention et une vue de dessus d'une poignée et du champ électrique généré par le capteur selon l'invention.Advantageously, depending on the thickness of said printed circuit, said shielding element is referenced to a floating or electrical potential such as ground or to the measuring electrode. FIGS. 5 and 6 respectively illustrate a sectional view of the electric field generated by the sensor according to the invention and a view from above of a handle and the electric field generated by the sensor according to the invention.
Ces figures montrent que le champ électrique β produit par le capteur 6, selon l'invention, subit un aplatissement au niveau de la partie externe de la poignée 1.These figures show that the electric field β produced by the sensor 6, according to the invention, undergoes a flattening at the outer portion of the handle 1.
Ledit capteur 6 permet d'obtenir une détection dissymétrique dans le plan horizontal par rapport à l'ouvrant, générant ainsi une zone de détection optimale de variation de capacité fiable, précise et limitée à cet espace prédéfini permettant ainsi d'éviter toutes détections parasites et d'affecter sa sensibilité dans ladite zone.Said sensor 6 makes it possible to obtain an asymmetrical detection in the horizontal plane with respect to the opening, thus generating an optimal detection zone of reliable, precise and limited variation of capacity to this predefined space thus making it possible to avoid any parasitic detections and to affect its sensitivity in said area.
Avantageusement, le capteur 6 selon l'invention permet également d'obtenir une détection symétrique dans le plan vertical par rapport à l'ouvrant, permettant de réaliser des poignées gauche et droite identiques réduisant ainsi les coûts de production et facilitant le montage.Advantageously, the sensor 6 according to the invention also makes it possible to obtain a symmetrical detection in the vertical plane with respect to the opening, making it possible to produce identical left and right handles thus reducing production costs and facilitating assembly.
A titre d'exemple illustratif, l'utilisateur qui souhaite que son ouvrant se verrouille ou se déverrouille approche, tout ou partie d'une main, au voisinage des parties inférieure, supérieure ou interne de la poignée. L'authentification est réalisée préalablement ou à la suite de la détection par ledit capteur. Ledit capteur selon l'invention offre ainsi une zone de détection limitée dans un espace prédéfini permettant un verrouillage/déverrouillage de l'ouvrant que lorsque ces déclenchements sont souhaités. II va de soi que le mode de réalisation du capteur capacitif directif décrit ci-dessus a été donné à titre d'exemple purement indicatif et nullement limitatif, et que de nombreuses modifications peuvent être facilement apportées par l'homme de l'art sans pour autant sortir du cadre de l'invention. As an illustrative example, the user who wishes that its opening locks or unlocks approaches, all or part of a hand in the vicinity of the lower, upper or inner parts of the handle. The authentication is carried out beforehand or following the detection by said sensor. Said sensor according to the invention thus offers a limited detection zone in a predefined space allowing a locking / unlocking of the sash only when these triggers are desired. It goes without saying that the embodiment of the directional capacitive sensor described above has been given as a purely indicative and non-limiting example, and that many modifications can be easily made by those skilled in the art without as far out of the scope of the invention.
LEGENDE 1. poignée 2. partie de préhension de la poignéeLEGEND 1. handle 2. gripping part of the handle
3. partie fixe de la poignée3. fixed part of the handle
4. ouvrant du véhicule4. opening vehicle
5. zone de détection5. detection area
6. capteur d'approche capacitif directif 7. électrode de mesure6. Directional capacitive approach sensor 7. Measuring electrode
8. circuit imprimé8. circuit board
9. électrode de référence9. reference electrode
10. élément de blindage métallique α champ électrique produit par le capteur selon l'art antérieur β champ électrique produit par le capteur selon l'invention 10. metal shielding element α electric field produced by the sensor according to the prior art β electric field produced by the sensor according to the invention

Claims

REVENDICATIONS
1. Capteur d'approche capacitif (6) destiné à être intégré dans une poignée (1 ) d'ouvrant (4), notamment pour véhicule en vue de son verrouillage/déverrouillage comportant au moins une électrode formée sur un circuit imprimé (8), de manière à créer une zone de détection (5) de présence d'un utilisateur, caractérisé en ce qu'il comporte au moins un élément de blindage métallique (10) formé sur ledit circuit imprimé.1. Capacitive approach sensor (6) intended to be integrated in a handle (1) of opening (4), in particular for a vehicle with a view to its locking / unlocking comprising at least one electrode formed on a printed circuit (8) , so as to create a presence detection zone (5) of a user, characterized in that it comprises at least one metal shield element (10) formed on said printed circuit.
2. Capteur selon la revendication 1 , caractérisé en ce que ledit élément de blindage (10) forme une des faces du circuit imprimé (8).2. Sensor according to claim 1, characterized in that said shielding element (10) forms one of the faces of the printed circuit (8).
3. Capteur selon la revendication 1 ou 2, caractérisé en ce que ledit élément de blindage (10) s'étend longitudinalement et parallèlement sur toute la longueur de ladite au moins une électrode.3. Sensor according to claim 1 or 2, characterized in that said shielding element (10) extends longitudinally and parallel over the entire length of said at least one electrode.
4. Capteur selon l'une des revendications 1 à 3, caractérisé en ce que ledit élément de blindage (10) est un matériau de type conducteur.4. Sensor according to one of claims 1 to 3, characterized in that said shielding element (10) is a conductive type material.
5. Capteur selon la revendication 4, caractérisé en ce que ledit élément de blindage (10) est constitué de cuivre.5. Sensor according to claim 4, characterized in that said shielding element (10) is made of copper.
6. Capteur selon l'une des revendications 1 à 5, caractérisé en ce que ledit élément de blindage (10) présente une structure ajourée.6. Sensor according to one of claims 1 to 5, characterized in that said shielding element (10) has a perforated structure.
7. Capteur selon la revendication 6, caractérisé en ce que ladite structure ajourée est un treillis conducteur. 7. Sensor according to claim 6, characterized in that said perforated structure is a conducting lattice.
8. Capteur selon l'une des revendications 1 à 7, caractérisé en ce que ledit élément de blindage (10) est référencé à potentiel électrique ou flottant.8. Sensor according to one of claims 1 to 7, characterized in that said shielding element (10) is referenced to electric potential or floating.
9. Capteur selon l'une quelconques des revendication précédentes, caractérisé en ce que ledit circuit imprimé (8) présente sur une des ses faces, une électrode de référence (9) entourée par une électrode de mesure (7) et sur son autre face, un élément de blindage métallique (10).9. Sensor according to any one of the preceding claims, characterized in that said printed circuit (8) has on one of its faces, a reference electrode (9) surrounded by a measuring electrode (7) and on its other side , a metal shielding element (10).
10. Capteur selon l'une quelconques des revendication précédentes, caractérisé en ce qu'il comprend des moyens de détection dissymétrique dans le plan horizontal et symétrique dans le plan vertical, par rapport audit ouvrant. 10. Sensor according to any one of the preceding claims, characterized in that it comprises asymmetrical detection means in the horizontal plane and symmetrical in the vertical plane, with respect to said opening.
EP09809341A 2008-08-27 2009-08-27 Closing-in sensor for locking/unlocking a door leaf Withdrawn EP2356302A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0804721A FR2935416B1 (en) 2008-08-27 2008-08-27 APPROACH SENSOR FOR LOCKING / UNLOCKING AN OPENER
FR0804773A FR2935417B1 (en) 2008-08-27 2008-08-29 APPROACH SENSOR FOR LOCKING / UNLOCKING AN OPENER
PCT/EP2009/061089 WO2010023250A1 (en) 2008-08-27 2009-08-27 Closing-in sensor for locking/unlocking a door leaf

Publications (1)

Publication Number Publication Date
EP2356302A1 true EP2356302A1 (en) 2011-08-17

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EP09809341A Withdrawn EP2356302A1 (en) 2008-08-27 2009-08-27 Closing-in sensor for locking/unlocking a door leaf

Country Status (6)

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US (1) US20110304427A1 (en)
EP (1) EP2356302A1 (en)
JP (1) JP2012500919A (en)
CN (1) CN102131992A (en)
FR (2) FR2935416B1 (en)
WO (1) WO2010023250A1 (en)

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Also Published As

Publication number Publication date
FR2935416B1 (en) 2011-06-17
FR2935417B1 (en) 2011-09-23
FR2935417A1 (en) 2010-03-05
FR2935416A1 (en) 2010-03-05
WO2010023250A1 (en) 2010-03-04
US20110304427A1 (en) 2011-12-15
CN102131992A (en) 2011-07-20
JP2012500919A (en) 2012-01-12

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