WO2008135216A1 - Method for neutralising a portable remote control unit lost in an interior region of a vehicle provided with a hands-free access device and corresponding hands-free access device - Google Patents

Method for neutralising a portable remote control unit lost in an interior region of a vehicle provided with a hands-free access device and corresponding hands-free access device Download PDF

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Publication number
WO2008135216A1
WO2008135216A1 PCT/EP2008/003501 EP2008003501W WO2008135216A1 WO 2008135216 A1 WO2008135216 A1 WO 2008135216A1 EP 2008003501 W EP2008003501 W EP 2008003501W WO 2008135216 A1 WO2008135216 A1 WO 2008135216A1
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WO
WIPO (PCT)
Prior art keywords
antenna
vehicle
zone
passenger compartment
external
Prior art date
Application number
PCT/EP2008/003501
Other languages
French (fr)
Inventor
Alain Brillon
Original Assignee
Continental Automotive France
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 Continental Automotive France filed Critical Continental Automotive France
Publication of WO2008135216A1 publication Critical patent/WO2008135216A1/en

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • B60R25/245—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user where the antenna reception area plays a role
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle

Definitions

  • the invention relates to a method of neutralizing a portable remote control unit, said identifier, when the latter is forgotten in an interior area of a vehicle equipped with a hands-free access device. It extends to a hands-free access device implementing this method of neutralization.
  • Hands-free access devices to a vehicle conventionally comprise a portable remote control unit, called an identifier, a central unit embedded in the vehicle, and transmission means, on the one hand, disposed in the vehicle and on the other part, integrated in the identifier, and adapted to allow to establish a dialogue between the central unit and the said identifier for the implementation of procedures for authorization of access to the vehicle and startup of the latter.
  • the transmission means arranged in the vehicle usually comprise:
  • indoor antennas for the transmission of identification signals to identifiers located inside the vehicle.
  • a solution to this problem consists, for passenger vehicles, in the first place, to order, before the launch of the vehicle access authorization procedure, the transmission by the internal antennas of a detection signal of possible identifiers located inside the vehicle, then, secondly, to implement a procedure for temporary inhibition of identifiers possibly detected.
  • Such a solution is particularly effective for passenger vehicles because the passenger compartment is relatively small and can be easily covered in its entirety by the internal antennas of the access device and / or hands-free start.
  • the utility cargo area commercial vehicles generally consists of a large area for the transport of objects of very different shapes and sizes, and can also be arranged in a very variable manner. As a result, it is extremely difficult to guarantee complete coverage of such utility areas by internal transmitting antennas positioned in said area.
  • the present invention aims at overcoming this drawback and its main purpose is to make it possible to equip a vehicle, especially a utility vehicle, with hands-free access devices equipped with external transmitting antennas positioned at any desired location on the outside of said vehicle without risk of accidental unlocking of this vehicle resulting from forgetting an identifier inside the vehicle.
  • the invention aims at a method of neutralizing a portable remote control unit, said identifier, when the latter is forgotten in an area.
  • interior, called the utility zone of a passenger compartment of a vehicle equipped with a hands-free access device comprising in particular, in addition to the said identifier, at least one external transmitting antenna transmitting identification signals intended for identifiers located outside the vehicle, said outer antenna having a cover divided into two areas consisting of an outer area extending outside the passenger compartment, and an inner area extending inside the the passenger compartment in the utility area of the latter.
  • this method of neutralization consists, for each external antenna whose coverage extends partially in the utilitarian zone of the cabin: "to install in said utility area a specific indoor transmitter antenna, said counter antenna, positioned and of power adapted to have a cover extending in the passenger compartment and covering at least the inner area of the outer antenna cover,
  • the invention thus consists in installing, for each external transmitting antenna, a counter antenna whose specific function is to scramble, in an area corresponding to the zone covered inside the vehicle by this external transmitting antenna, the identification signal transmitted. by the latter, in order to make this signal unidentifiable by an identifier located in the said zone.
  • this counter-antenna is set up opposite the external antenna and has an emission power adapted to the overflow of the external antenna inside the passenger compartment.
  • the power used by the counter antenna according to the invention is adapted and is limited to what is necessary. This reduces the cost of this counter antenna.
  • the identifiers possibly forgotten in the vehicle no longer receive signals from the external antenna (since these signals are scrambled) and no longer react unexpectedly.
  • Each identifier located in a covered zone, according to the invention, by an external antenna and a counter-antenna, receives, indeed, a signal composed of a superposition of the identification signal emitted by the external antenna and the parasitic signal. transmitted by the counter-antenna, that is to say a global signal that can not be identified by the said identifier, which therefore emits no signal in response.
  • the method according to the invention makes it possible to install an external transmitting antenna on one of the doors of a commercial vehicle (side or rear) giving access to the utility area of loading of this vehicle, without risk of accidental unlocking of this vehicle resulting from the forgetting of an identifier in the said loading area.
  • each counter antenna is placed opposite an external antenna, so that said counter-antenna and said external antenna are arranged opposite each other on either side of the antenna. bodywork delimiting the passenger compartment of the vehicle.
  • This positioning makes it possible to obtain, inside the vehicle, the superposition of two signals, emitted respectively by an external antenna and the associated counter-antenna, having a comparable amplitude and shape guaranteeing jamming, in the entire zone. inside covered, identification signals emitted by the external antenna.
  • each identification signal transmitted by an external antenna comprises a data frame incorporating a preamble consisting of an awakening code identifiable by an identifier, and the parasitic signal emitted by each against antenna is designed to scramble the preamble of the identification signal.
  • the identifiers forgotten in a vehicle are unable to identify the wake up code likely to "wake up", so that any risk of rapid discharge of the battery incorporated in these identifiers, resulting from the periodic emission by the external antenna of identification signals, is discarded.
  • the invention extends to a device for free access to a passenger compartment of a vehicle comprising: • a central unit embedded in the vehicle,
  • transmission means adapted to allow a dialogue to be established between the central unit and each identifier and including, in particular, embedded in the vehicle, at least one external transmitting antenna for transmitting identification signals intended for identifiers located outside the vehicle, said outer antenna having a cover divided into two areas consisting of an outer area extending outside the passenger compartment, and an inner area extending inside the the cabin in an area, called the utility area, of the latter.
  • this hands-free access device is characterized in that:
  • the central unit is programmed to control, simultaneously with the emission of each identification signal by an external antenna whose coverage extends partially in the utilitarian zone of the passenger compartment, the transmission, by the associated counter antenna , a spurious signal designed to scramble the said identification signal.
  • FIG. 1 is a schematic top view of a utility vehicle equipped with a hands-free access device according to the invention
  • FIG. 2 is a schematic side view of this utility vehicle.
  • the invention shown in Figures 1 and 2 is a device usually known as the "hands-free access device” adapted to allow access to a vehicle 1 and possibly start the latter through the identification of a portable remote control box B commonly referred to as "electronic badge” or identifier.
  • this invention applies more specifically to hands-free access devices fitted to commercial vehicles 1, that is to say vehicles whose cabin is divided into: • a zone before starter forming a cockpit 2 accessible by means of two front doors, such as 4, each with a handle such as P1. And a rear zone consisting of a loading utility area 3 accessible, for example, by means of a rear door 5 provided with a handle P2.
  • this hands-free access device comprises, in the first place, transmitting antennas arranged inside, in the control cabin 2, and outside the vehicle 1, and connected to a central unit 6 embedded in the said vehicle and equipped with a computer incorporating a low frequency transmitter
  • the external antennas intended for the implementation of vehicle access authorization procedures 1, are, for example three in number: • two antennas 7, 8 each integrated into the handle P1 of one of the front doors 4,
  • a third antenna 9 integrated in the handle P2 of the rear door 5, and whose cover Z9 is divided into two zones consisting of an outer zone extending outside the the passenger compartment of the vehicle 1, mainly at the rear of the latter, and an inner zone Zc extending inside the passenger compartment of the vehicle 1, in the utility zone 3 of the latter.
  • the single internal antenna 10 intended for the implementation of authorization procedures for starting the vehicle 1 and procedures for inhibiting identifiers B forgotten in the cockpit 2, is arranged in the said cabin to cover all of the latter.
  • the identifier B of this hands-free access device comprises, meanwhile, a computer integrating a low frequency receiver "BF” and a radio frequency transmitter "RF" connected to antennas such as 12.
  • this hands-free access device further comprises a specific transmitting antenna 11, referred to as an antenna, arranged in the utility zone 3 of the vehicle 1, immediately opposite the external antenna 9. positioned in the handle P2 of the rear door.
  • this counter antenna 11 are adapted so that its cover Z11 extends in the utility zone 3 and covers at least the inner zone Zc of the cover Z9 of the external antenna 9.
  • the counter-antenna 11 and the outside antenna 9 can also be arranged at the level of the floor, always facing each other on either side of the bodywork.
  • the central unit 6 is programmed to control, simultaneously with the transmission of each identification signal by the external antenna 9, the transmission, by the counter antenna 11, of a parasitic signal designed to scramble the said identification signal.
  • the identification signal transmitted by the external antenna 9 comprises, in the usual way, a data frame incorporating a preamble consisting of a wake-up code identifiable by an identifier B
  • the parasitic signal emitted by each counter-antenna 11 is designed to scramble the preamble of the identification signal.
  • the identification signal emitted by the external antennas 7-9 of the hands-free access device, and therefore in particular by the external antenna 9, consists of a coded "Manchester" signal S1. .
  • the parasitic signal S2 emitted by the specific counter-antenna 11 then advantageously consists, as represented in FIG. 1, in a signal comprising an initial portion of modulated signal longer than the cumulative length of two successive bits of a coded signal. "Manchester”.
  • the inner zone Zc of the cover Z9 of the external antenna 9 receives a signal S3 comprising a superposition of the signals S1 and S2.
  • This signal S3 is not understandable by the badge B which, therefore, can not answer (it is not even woken up) and is "neutralized" when the identification signals are transmitted by the external antenna 9.
  • any identifier B possibly forgotten in this zone Zc is neutralized.
  • the identifiers B are no longer involved in the identification procedure because they are unable to identify the wake-up code likely to "wake up".
  • the invention can be applied to any external antenna, and in particular in the context of a utility vehicle 1 equipped with a side door, with an external antenna positioned at the latter.

Abstract

The invention relates to a method for the neutralisation of a portable unit (B), called the identifier, on the loss thereof within an interior region (3), called the usable space of a vehicle (1), provided with a hands-free access device, comprising at least one external transmitting antenna (9), transmitting identification signals for identifiers (B) outside the vehicle (1), said external antenna having a cover (Z9), formed by an exterior region extending to the exterior of the vehicle (1) and an interior region (Zc) extending into the interior of the vehicle into the usable space (3) thereof. According to the invention, the neutralisation method comprises installing facing each exterior antenna (9), a specific interior transmitting antenna (11) called the counter antenna the cover (Z11) of which covers at least the interior region (Zc) of the cover (Z9) of said exterior antenna and to control simultaneously to retransmission of each identification signal S1 by said exterior antenna, retransmission by the counter antenna (11 ) of a parasite signal S2 designed to jam said identification signal.

Description

Procédé de neutralisation d'un boîtier portable de commande à distance oublié dans une zone intérieure d'un véhicule équipé d'un dispositif d'accès mains libres. et dispositif d'accès mains libres correspondant A method of disabling a remote remote control portable box forgotten in an interior area of a vehicle equipped with a hands-free access device. and corresponding hands-free access device
L'invention concerne un procédé de neutralisation d'un boîtier portable de commande à distance, dit identifiant, lors de l'oubli de ce dernier dans une zone intérieure d'un véhicule équipé d'un dispositif d'accès mains libres. Elle s'étend à un dispositif d'accès mains libres mettant en œuvre ce procédé de neutralisation. Les dispositifs d'accès mains libres à un véhicule comportent classiquement un boîtier portable de commande à distance, appelé identifiant, une unité centrale embarquée dans le véhicule, et des moyens de transmission, d'une part, disposés dans le véhicule et d'autre part, intégrés dans l'identifiant, et adaptés pour permettre d'instaurer un dialogue entre l'unité centrale et le dit identifiant en vue de la mise en œuvre de procédures d'autorisation d'accès au véhicule et de démarrage de ce dernier.The invention relates to a method of neutralizing a portable remote control unit, said identifier, when the latter is forgotten in an interior area of a vehicle equipped with a hands-free access device. It extends to a hands-free access device implementing this method of neutralization. Hands-free access devices to a vehicle conventionally comprise a portable remote control unit, called an identifier, a central unit embedded in the vehicle, and transmission means, on the one hand, disposed in the vehicle and on the other part, integrated in the identifier, and adapted to allow to establish a dialogue between the central unit and the said identifier for the implementation of procedures for authorization of access to the vehicle and startup of the latter.
En outre, les moyens de transmission disposés dans le véhicule comprennent usuellement :In addition, the transmission means arranged in the vehicle usually comprise:
• en vue de la mise en œuvre de procédures d'autorisation d'accès au véhicule, des antennes émettrices extérieures destinées à l'émission périodique de signaux d'identification à destination d'identifiants situés à l'extérieur du véhicule, permettant l'identification des dits identifiants dés leur introduction dans une zone de couverture d'étendue prédéterminée autour du véhicule,• for the purpose of implementing vehicle access authorization procedures, external transmitting antennas for the periodic transmission of identification signals to identifiers located outside the vehicle, allowing the identifying said identifiers as soon as they are introduced into a predetermined range of coverage area around the vehicle,
• et en vue de la mise en œuvre de procédures d'autorisation de démarrage du véhicule, des antennes intérieures destinées à l'émission de signaux d'identification à destination d'identifiants situés à l'intérieur du véhicule.• and in view of the implementation of vehicle start authorization procedures, indoor antennas for the transmission of identification signals to identifiers located inside the vehicle.
Un des inconvénients que présentent de tels dispositifs d'accès mains libres résulte du fait que les antennes émettrices extérieures, généralement intégrées dans les poignées des portières, présentent une couverture s'étendant non seulement à l'extérieur du véhicule, tel que recherché, mais également à l'intérieur du véhicule. II découle, en effet, de cet état de fait que lors de l'oubli d'un identifiant dans un véhicule, dans une zone couverte par une antenne émettrice extérieure, cet identifiant est identifié comme étant situé à l'extérieur du véhicule lors de la procédure d'autorisation d'accès au dit véhicule, de sorte que cette procédure conduit à une autorisation de déverrouillage du véhicule. Une solution pour résoudre ce problème consiste, pour les véhicules de tourisme, en premier lieu, à commander, avant le lancement de la procédure d'autorisation d'accès au véhicule, l'émission par les antennes intérieures d'un signal de détection d'éventuels identifiants situés à l'intérieur du véhicule, puis, en second lieu, à mettre en œuvre une procédure d'inhibition provisoire des identifiants éventuellement détectés.One of the drawbacks of such hands-free access devices results from the fact that the external transmitting antennas, generally integrated into the door handles, have a cover extending not only outside the vehicle, as desired, but also inside the vehicle. It follows, indeed, from this fact that when an identifier is forgotten in a vehicle, in an area covered by an external transmitting antenna, this identifier is identified as being located outside the vehicle when the procedure for granting access to said vehicle, so that this procedure leads to an authorization to unlock the vehicle. A solution to this problem consists, for passenger vehicles, in the first place, to order, before the launch of the vehicle access authorization procedure, the transmission by the internal antennas of a detection signal of possible identifiers located inside the vehicle, then, secondly, to implement a procedure for temporary inhibition of identifiers possibly detected.
Une telle solution s'avère particulièrement efficace pour les véhicules de tourisme car l'habitacle de ces derniers est relativement restreint et peut être facilement couvert dans son intégralité par les antennes intérieures du dispositif d'accès et / ou de démarrage mains libres.Such a solution is particularly effective for passenger vehicles because the passenger compartment is relatively small and can be easily covered in its entirety by the internal antennas of the access device and / or hands-free start.
Une telle solution s'avère également efficace pour les véhicules utilitaires à condition de positionner les antennes extérieures sur les seules portières avant d'accès à la cabine de « pilotage » positionnée à l'avant du véhicule. En effet, cette cabine de pilotage peut, tel que précédemment, être facilement couverte dans son intégralité par les antennes intérieures du dispositif d'accès et/ ou de démarrage mains libres, elles mêmes positionnées, de par leur fonction, dans la dite cabine de pilotage.Such a solution is also effective for commercial vehicles provided that the external antennas are positioned on the only doors before accessing the "steering" cabin positioned at the front of the vehicle. Indeed, this cockpit can, as previously, be easily covered in its entirety by the internal antennas of the access device and / or hands-free start, they themselves positioned, by their function, in the said cabin. piloting.
Par contre, un positionnement des antennes intérieures dans la zone arrière utilitaire rend très aléatoire la détection d'identifiants oubliés dans cette zone utilitaire par la mise en œuvre de la solution ci-dessus explicitée.On the other hand, a positioning of the internal antennas in the back utility area makes it very difficult to detect forgotten identifiers in this utilitarian zone by the implementation of the above-mentioned solution.
En effet, la zone utilitaire de chargement des véhicules utilitaires consiste généralement en une zone de grande surface destinée au transport d'objets de formes et dimensions très diverses, et pouvant, en outre, être aménagée de façon très variable. De ce fait, il s'avère extrêmement difficile de garantir une couverture complète de telles zones utilitaires par des antennes émettrices intérieures positionnées dans la dite zone.Indeed, the utility cargo area commercial vehicles generally consists of a large area for the transport of objects of very different shapes and sizes, and can also be arranged in a very variable manner. As a result, it is extremely difficult to guarantee complete coverage of such utility areas by internal transmitting antennas positioned in said area.
Il est également déjà connu, du document FR 2 837 964, d'utiliser une antenne intérieure, déjà présente dans l'habitacle du véhicule, pour émettre à l'intérieur du véhicule un message destiné à brouiller les émissions de l'antenne externe à l'intérieur du véhicule lors de l'émission de cette antenne externe. Ainsi l'antenne externe n'est pas perçue à l'intérieur du dispositif. Cependant, là encore, l'antenne interne ne couvre correctement la zone interne du véhicule que lorsqu'il s'agit d'un véhicule de tourisme. En effet lorsqu'il s'agit d'un véhicule utilitaire le chargement embarqué dans le véhicule influe sur la propagation des ondes à l'intérieur du véhicule et dans ce cas l'antenne interne émettant le signal destiné à brouiller le signal de l'antenne externe ne couvre pas correctement l'intérieur du véhicule.It is also already known, from document FR 2 837 964, to use an internal antenna, already present in the passenger compartment of the vehicle, to emit inside the vehicle a message intended to scramble the transmissions of the external antenna to inside the vehicle when transmitting this external antenna. Thus the external antenna is not perceived inside the device. However, again, the internal antenna correctly covers the internal area of the vehicle only when it is a passenger vehicle. Indeed, when it is a utility vehicle load onboard the vehicle influences the propagation of waves inside the vehicle and in this case the internal antenna emitting the signal to scramble the signal of the external antenna does not properly cover the inside of the vehicle.
La présente invention vise à pallier cet inconvénient et a pour principal objectif de permettre d'équiper un véhicule, notamment utilitaire, de dispositifs d'accès mains libres dotés d'antennes émettrices extérieures positionnées en tout endroit désiré à l'extérieur du dit véhicule sans risque de déverrouillage accidentel de ce véhicule résultant de l'oubli d'un identifiant à l'intérieur de ce dernier.The present invention aims at overcoming this drawback and its main purpose is to make it possible to equip a vehicle, especially a utility vehicle, with hands-free access devices equipped with external transmitting antennas positioned at any desired location on the outside of said vehicle without risk of accidental unlocking of this vehicle resulting from forgetting an identifier inside the vehicle.
A cet effet, l'invention vise un procédé de neutralisation d'un boîtier portable de commande à distance, dit identifiant, lors de l'oubli de ce dernier dans une zone intérieure, dite zone utilitaire, d'un habitacle d'un véhicule équipé d'un dispositif d'accès mains libres comportant notamment, outre le dit identifiant, au moins une antenne émettrice extérieure d'émission de signaux d'identification à destination d'identifiants situés à l'extérieur du véhicule, la dite antenne extérieure présentant une couverture se divisant en deux zones consistant en une zone extérieure s'étendant à l'extérieur de l'habitacle, et une zone intérieure s'étendant à l'intérieur de l'habitacle dans la zone utilitaire de ce dernier.For this purpose, the invention aims at a method of neutralizing a portable remote control unit, said identifier, when the latter is forgotten in an area. interior, called the utility zone, of a passenger compartment of a vehicle equipped with a hands-free access device comprising in particular, in addition to the said identifier, at least one external transmitting antenna transmitting identification signals intended for identifiers located outside the vehicle, said outer antenna having a cover divided into two areas consisting of an outer area extending outside the passenger compartment, and an inner area extending inside the the passenger compartment in the utility area of the latter.
Selon l'invention, ce procédé de neutralisation consiste, pour chaque antenne extérieure dont la couverture s'étend partiellement dans la zone utilitaire de l'habitacle : « à installer dans la dite zone utilitaire une antenne émettrice intérieure spécifique, dite contre antenne, positionnée et de puissance adaptée pour présenter une couverture s'étendant dans l'habitacle et couvrant au moins la zone intérieure de la couverture de l'antenne extérieure,According to the invention, this method of neutralization consists, for each external antenna whose coverage extends partially in the utilitarian zone of the cabin: "to install in said utility area a specific indoor transmitter antenna, said counter antenna, positioned and of power adapted to have a cover extending in the passenger compartment and covering at least the inner area of the outer antenna cover,
• et à commander, simultanément à l'émission de chaque signal d'identification par l'antenne extérieure, l'émission, par la contre antenne, d'un signal parasite conçu pour brouiller le dit signal d'identification.And to control, simultaneously with the transmission of each identification signal by the external antenna, the emission, by the counter-antenna, of a parasitic signal designed to scramble the said identification signal.
L'invention consiste ainsi à installer, pour chaque antenne émettrice extérieure, une contre antenne ayant pour fonction spécifique de brouiller, dans une zone correspondant à la zone couverte à l'intérieur du véhicule par cette antenne émettrice extérieure, le signal d'identification émis par cette dernière, afin de rendre ce signal non identifiable par un identifiant situé dans la dite zone.The invention thus consists in installing, for each external transmitting antenna, a counter antenna whose specific function is to scramble, in an area corresponding to the zone covered inside the vehicle by this external transmitting antenna, the identification signal transmitted. by the latter, in order to make this signal unidentifiable by an identifier located in the said zone.
Ainsi la neutralisation des émissions de l'antenne externe, à l'intérieur du véhicule, est garantie, quelque soit la position de l'antenne externe et ce même dans le cas d'un véhicule utilitaire et quelque soit le type de chargement embarqué (métallique ou non etc.), puisqu'une antenne spécifique (appelée contre antenne) est positionnée de manière à neutraliser les émissions de l'antenne externe vers l'intérieur de l'habitable. Avantageusement cette contre antenne est mise en place en regard de l'antenne externe et présente une puissance d'émission adaptée au débordement de l'antenne externe à l'intérieur de l'habitacle. Ainsi la puissance utilisée par la contre antenne selon l'invention est adaptée et est limitée à ce qui est juste nécessaire. Cela permet de réduire le coût de cette contre antenne.Thus the neutralization of the emissions of the external antenna, inside the vehicle, is guaranteed, whatever the position of the external antenna and this even in the case of a commercial vehicle and whatever the type of onboard loading ( metallic or not, etc.), since a specific antenna (called counter antenna) is positioned to neutralize the emissions of the external antenna towards the interior of the habitable. Advantageously, this counter-antenna is set up opposite the external antenna and has an emission power adapted to the overflow of the external antenna inside the passenger compartment. Thus the power used by the counter antenna according to the invention is adapted and is limited to what is necessary. This reduces the cost of this counter antenna.
Les identifiants éventuellement oubliés dans le véhicule ne reçoivent plus de signaux de l'antenne externe (puisque ces signaux sont brouillés) et ne répondent plus intempestivement. Chaque identifiant situé dans une zone couverte, selon l'invention, par une antenne extérieure et une contre antenne, reçoit, en effet, un signal composé d'une superposition du signal d'identification émis par l'antenne extérieure et du signal parasite émis par la contre antenne, c'est-à-dire un signal global non identifiable par le dit identifiant qui n'émet donc aucun signal en réponse.The identifiers possibly forgotten in the vehicle no longer receive signals from the external antenna (since these signals are scrambled) and no longer react unexpectedly. Each identifier located in a covered zone, according to the invention, by an external antenna and a counter-antenna, receives, indeed, a signal composed of a superposition of the identification signal emitted by the external antenna and the parasitic signal. transmitted by the counter-antenna, that is to say a global signal that can not be identified by the said identifier, which therefore emits no signal in response.
Il est à noter, en outre, que la zone couverte, à l'intérieur d'un véhicule, par une antenne émettrice extérieure est relativement réduite par rapport à la couverture totale d'une telle antenne extérieure, de sorte que la position et la puissance de la contre antenne associée peuvent être aisément calculées et ajustées de façon que la dite contre antenne couvre :It should be noted, moreover, that the area covered, inside a vehicle, by an external transmitting antenna is relatively small compared to the total coverage of such an external antenna, so that the position and power of the associated counter antenna can be easily calculated and adjusted so that said counter antenna covers:
• à l'intérieur du véhicule, au moins la zone intérieure de la couverture de l'antenne extérieure, • et, à l'extérieur du véhicule, une zone de surface quasi nulle du fait de la faible puissance requise pour la contre antenne, et de l'écran que forme la carrosserie du véhicule vis-à-vis des signaux émis par la dite contre antenne.• inside the vehicle, at least the inside area of the outer antenna cover, • and, outside the vehicle, a zone of almost zero surface area due to the low power required for the counter-antenna, and the screen that forms the body of the vehicle vis-à-vis the signals emitted by said counter-antenna.
A titre d'application avantageuse, le procédé selon l'invention permet d'installer une antenne émettrice extérieure sur une des portes d'un véhicule utilitaire (latérale ou arrière) donnant accès à la zone utilitaire de chargement de ce véhicule, sans risque de déverrouillage accidentel de ce véhicule résultant de l'oubli d'un identifiant dans la dite zone de chargement.As an advantageous application, the method according to the invention makes it possible to install an external transmitting antenna on one of the doors of a commercial vehicle (side or rear) giving access to the utility area of loading of this vehicle, without risk of accidental unlocking of this vehicle resulting from the forgetting of an identifier in the said loading area.
Selon un mode de mise en oeuvre avantageux, on installe chaque contre antenne en regard d'une antenne extérieure, de façon que la dite contre antenne et la dite antenne extérieure soient disposées en vis-à-vis de part et d'autre de la carrosserie délimitant l'habitacle du véhicule.According to an advantageous embodiment, each counter antenna is placed opposite an external antenna, so that said counter-antenna and said external antenna are arranged opposite each other on either side of the antenna. bodywork delimiting the passenger compartment of the vehicle.
Ce positionnement permet d'obtenir, à l'intérieur du véhicule, la superposition de deux signaux, émis respectivement par une antenne extérieure et la contre antenne associée, présentant une amplitude et une forme comparables garantissant le brouillage, dans l'intégralité de la zone intérieure couverte, des signaux d'identification émis par l'antenne extérieure.This positioning makes it possible to obtain, inside the vehicle, the superposition of two signals, emitted respectively by an external antenna and the associated counter-antenna, having a comparable amplitude and shape guaranteeing jamming, in the entire zone. inside covered, identification signals emitted by the external antenna.
Selon un autre mode de mise en œuvre avantageux de l'invention, chaque signal d'identification émis par une antenne extérieure comporte une trame de données incorporant un préambule consistant en un code de réveil identifiable par un identifiant, et le signal parasite émis par chaque contre antenne est conçu pour brouiller le préambule du signal d'identification.According to another advantageous embodiment of the invention, each identification signal transmitted by an external antenna comprises a data frame incorporating a preamble consisting of an awakening code identifiable by an identifier, and the parasitic signal emitted by each against antenna is designed to scramble the preamble of the identification signal.
Selon ce principe, les identifiants oubliés dans un véhicule s'avèrent dans l'impossibilité d'identifier le code de réveil susceptible de les « réveiller », de sorte que tout risque de décharge rapide de la pile incorporée dans ces identifiants, résultant de l'émission périodique par l'antenne extérieure de signaux d'identification, se trouve écarté.According to this principle, the identifiers forgotten in a vehicle are unable to identify the wake up code likely to "wake up", so that any risk of rapid discharge of the battery incorporated in these identifiers, resulting from the periodic emission by the external antenna of identification signals, is discarded.
L'invention s'étend à un dispositif d'accès mains libres à un habitacle d'un véhicule comprenant : • une unité centrale embarquée dans le véhicule,The invention extends to a device for free access to a passenger compartment of a vehicle comprising: • a central unit embedded in the vehicle,
• au moins un boîtier portable de commande à distance, dit identifiant, affecté au véhicule,At least one portable remote control unit, called identifier, assigned to the vehicle,
• et des moyens de transmission adaptés pour permettre d'instaurer un dialogue entre l'unité centrale et chaque identifiant et comprenant, notamment, embarquée dans le véhicule, au moins une antenne émettrice extérieure d'émission de signaux d'identification à destination d'identifiants situés à l'extérieur du véhicule, la dite antenne extérieure présentant une couverture se divisant en deux zones consistant en une zone extérieure s'étendant à l'extérieur de l'habitacle, et une zone intérieure s'étendant à l'intérieur de l'habitacle dans une zone, dite zone utilitaire, de ce dernier.And transmission means adapted to allow a dialogue to be established between the central unit and each identifier and including, in particular, embedded in the vehicle, at least one external transmitting antenna for transmitting identification signals intended for identifiers located outside the vehicle, said outer antenna having a cover divided into two areas consisting of an outer area extending outside the passenger compartment, and an inner area extending inside the the cabin in an area, called the utility area, of the latter.
Selon l'invention, ce dispositif d'accès mains libres se caractérise en ce que :According to the invention, this hands-free access device is characterized in that:
• il comprend, pour chaque antenne émettrice extérieure dont la couverture s'étend partiellement dans la zone utilitaire de l'habitacle, une antenne émettrice spécifique, dite contre antenne, installée dans la dite zone utilitaire, positionnée et de puissance adaptée pour présenter une couverture s'étendant dans l'habitacle et couvrant au moins la zone intérieure de la couverture de l'antenne extérieure,• It includes, for each external transmitting antenna whose coverage extends partially in the utility area of the passenger compartment, a specific transmitting antenna, said counter antenna, installed in said utility area, positioned and power adapted to present a cover extending into the cockpit and covering at least the inner area of the outer antenna cover,
• l'unité centrale est programmée pour commander, simultanément à l'émission de chaque signal d'identification par une antenne extérieure dont la couverture s'étend partiellement dans la zone utilitaire de l'habitacle, l'émission, par la contre antenne associée, d'un signal parasite conçu pour brouiller le dit signal d'identification.• the central unit is programmed to control, simultaneously with the emission of each identification signal by an external antenna whose coverage extends partially in the utilitarian zone of the passenger compartment, the transmission, by the associated counter antenna , a spurious signal designed to scramble the said identification signal.
D'autres caractéristiques buts et avantages de l'invention ressortiront de la description détaillée qui suit en référence aux dessins annexés qui en représentent à titre d'exemple non limitatif un mode de réalisation préférentiel. Sur ces dessins :Other features and advantages of the invention will become apparent from the detailed description which follows with reference to the accompanying drawings which represent by way of non-limiting example a preferred embodiment. On these drawings:
- la figure 1 est une vue de dessus schématique d'un véhicule utilitaire équipé d'un dispositif d'accès mains libres selon l'invention,FIG. 1 is a schematic top view of a utility vehicle equipped with a hands-free access device according to the invention,
- et la figure 2 est une vue latérale schématique de ce véhicule utilitaire. L'invention représentée aux figures 1 et 2 vise un dispositif usuellement connu sous l'appellation « dispositif d'accès mains libres » adapté pour permettre d'accéder à un véhicule 1 et éventuellement de démarrer ce dernier grâce à l'identification d'un boîtier portable de commande à distance B communément dénommé « badge électronique » ou identifiant.and FIG. 2 is a schematic side view of this utility vehicle. The invention shown in Figures 1 and 2 is a device usually known as the "hands-free access device" adapted to allow access to a vehicle 1 and possibly start the latter through the identification of a portable remote control box B commonly referred to as "electronic badge" or identifier.
Tel que représenté aux figures, cette invention s'applique de façon plus spécifique aux dispositifs d'accès mains libres équipant des véhicules utilitaires 1 , c'est-à- dire des véhicules dont l'habitacle se divise en : • une zone avant de démarrage formant une cabine de pilotage 2 accessible au moyen de deux portières avant, telle que 4, dotées chacune d'une poignée telle que P1. • et une zone arrière consistant en une zone utilitaire de chargement 3 accessible, par exemple, au moyen d'une porte arrière 5 munie d'une poignée P2.As shown in the figures, this invention applies more specifically to hands-free access devices fitted to commercial vehicles 1, that is to say vehicles whose cabin is divided into: • a zone before starter forming a cockpit 2 accessible by means of two front doors, such as 4, each with a handle such as P1. And a rear zone consisting of a loading utility area 3 accessible, for example, by means of a rear door 5 provided with a handle P2.
Tel que représenté aux figures, ce dispositif d'accès mains libres comprend, en premier lieu, des antennes émettrices disposées à l'intérieur, dans la cabine de pilotage 2, et à l'extérieur du véhicule 1 , et connectées à une unité centrale 6 embarquée dans le dit véhicule et dotée d'un calculateur intégrant un émetteur basse fréquenceAs represented in the figures, this hands-free access device comprises, in the first place, transmitting antennas arranged inside, in the control cabin 2, and outside the vehicle 1, and connected to a central unit 6 embedded in the said vehicle and equipped with a computer incorporating a low frequency transmitter
« BF » et un récepteur radio fréquence « RF »."BF" and an "RF" radio frequency receiver.
En premier lieu, les antennes extérieures, destinées à la mise en oeuvre de procédures d'autorisation d'accès au véhicule 1 , sont, en l'exemple au nombre de trois : • deux antennes 7, 8 intégrées chacune dans la poignée P1 d'une des portières avant 4,In the first place, the external antennas, intended for the implementation of vehicle access authorization procedures 1, are, for example three in number: • two antennas 7, 8 each integrated into the handle P1 of one of the front doors 4,
• et, de façon spécifique à l'invention, une troisième antenne 9 intégrée dans la poignée P2 de la porte arrière 5, et dont la couverture Z9 se divise en deux zones consistant en une zone extérieure s'étendant à l'extérieur de l'habitacle du véhicule 1 , principalement à l'arrière de ce dernier, et une zone intérieure Zc s'étendant à l'intérieur de l'habitacle du véhicule 1 , dans la zone utilitaire 3 de ce dernier.And, in a specific manner to the invention, a third antenna 9 integrated in the handle P2 of the rear door 5, and whose cover Z9 is divided into two zones consisting of an outer zone extending outside the the passenger compartment of the vehicle 1, mainly at the rear of the latter, and an inner zone Zc extending inside the passenger compartment of the vehicle 1, in the utility zone 3 of the latter.
En second lieu, l'antenne intérieure 10 unique destinée à la mise en œuvre de procédures d'autorisation de démarrage du véhicule 1 et de procédures d'inhibition d'identifiants B oubliés dans la cabine de pilotage 2, est disposée dans la dite cabine de pilotage en vue de couvrir l'intégralité de cette dernière.Secondly, the single internal antenna 10 intended for the implementation of authorization procedures for starting the vehicle 1 and procedures for inhibiting identifiers B forgotten in the cockpit 2, is arranged in the said cabin to cover all of the latter.
L'identifiant B de ce dispositif d'accès mains libres comprend, quant à lui, un calculateur intégrant un récepteur basse fréquence « BF » et un émetteur radio fréquence « RF » connectés à des antennes telles que 12.The identifier B of this hands-free access device comprises, meanwhile, a computer integrating a low frequency receiver "BF" and a radio frequency transmitter "RF" connected to antennas such as 12.
Selon l'invention, ce dispositif d'accès mains libres comprend, en outre, une antenne émettrice 11 spécifique, dite contre antenne, disposée dans la zone utilitaire 3 du véhicule 1 , immédiatement en vis-à-vis de l'antenne extérieure 9 positionnée dans la poignée P2 de la porte arrière.According to the invention, this hands-free access device further comprises a specific transmitting antenna 11, referred to as an antenna, arranged in the utility zone 3 of the vehicle 1, immediately opposite the external antenna 9. positioned in the handle P2 of the rear door.
De plus, la position et la puissance de cette contre antenne 11 sont adaptées pour que sa couverture Z11 s'étende dans la zone utilitaire 3 et couvre au moins la zone intérieure Zc de la couverture Z9 de l'antenne extérieure 9.In addition, the position and power of this counter antenna 11 are adapted so that its cover Z11 extends in the utility zone 3 and covers at least the inner zone Zc of the cover Z9 of the external antenna 9.
Il est à noter que, en variante de l'exemple représenté, la contre antenne 11 et l'antenne extérieure 9 peuvent également être disposées au niveau du plancher, toujours en vis-à-vis de part et d'autre de la carrosserie.It should be noted that, as a variant of the example shown, the counter-antenna 11 and the outside antenna 9 can also be arranged at the level of the floor, always facing each other on either side of the bodywork.
Egalement selon l'invention, l'unité centrale 6 est programmée pour commander, simultanément à l'émission de chaque signal d'identification par l'antenne extérieure 9, l'émission, par la contre antenne 11 , d'un signal parasite conçu pour brouiller le dit signal d'identification. De plus, lorsque le signal d'identification émis par l'antenne extérieure 9 comporte, de façon usuelle, une trame de données incorporant un préambule consistant en un code de réveil identifiable par un identifiant B, le signal parasite émis par chaque contre antenne 11 est conçu pour brouiller le préambule du signal d'identification. En l'exemple représenté à la figure 1 , le signal d'identification émis par les antennes extérieures 7-9 du dispositif d'accès mains libres, et donc notamment par l'antenne extérieure 9, consiste en un signal codé « Manchester » S1.Also according to the invention, the central unit 6 is programmed to control, simultaneously with the transmission of each identification signal by the external antenna 9, the transmission, by the counter antenna 11, of a parasitic signal designed to scramble the said identification signal. In addition, when the identification signal transmitted by the external antenna 9 comprises, in the usual way, a data frame incorporating a preamble consisting of a wake-up code identifiable by an identifier B, the parasitic signal emitted by each counter-antenna 11 is designed to scramble the preamble of the identification signal. In the example shown in FIG. 1, the identification signal emitted by the external antennas 7-9 of the hands-free access device, and therefore in particular by the external antenna 9, consists of a coded "Manchester" signal S1. .
Le signal parasite S2 émis par la contre antenne spécifique 11 consiste alors, avantageusement, tel que représenté à la figure 1 , en un signal comportant une portion initiale de signal modulé de longueur supérieure à celle cumulée de deux éléments binaires successifs d'un signal codé « Manchester ».The parasitic signal S2 emitted by the specific counter-antenna 11 then advantageously consists, as represented in FIG. 1, in a signal comprising an initial portion of modulated signal longer than the cumulative length of two successive bits of a coded signal. "Manchester".
Ainsi, la zone intérieure Zc de la couverture Z9 de l'antenne extérieure 9 reçoit un signal S3 comportant une superposition des signaux S1 et S2. Ce signal S3 n'est pas compréhensible par le badge B qui, de ce fait, ne peut répondre (il n'est d'ailleurs même pas réveillé) et se trouve « neutralisé » lors de l'émission des signaux d'identification par l'antenne extérieure 9. Ainsi tout identifiant B éventuellement oublié dans cette zone Zc se trouve neutralisé.Thus, the inner zone Zc of the cover Z9 of the external antenna 9 receives a signal S3 comprising a superposition of the signals S1 and S2. This signal S3 is not understandable by the badge B which, therefore, can not answer (it is not even woken up) and is "neutralized" when the identification signals are transmitted by the external antenna 9. Thus any identifier B possibly forgotten in this zone Zc is neutralized.
De plus, les identifiants B ne sont plus concernés par la procédure d'identification du fait qu'ils s'avèrent dans l'impossibilité d'identifier le code de réveil susceptible de les « réveiller ».In addition, the identifiers B are no longer involved in the identification procedure because they are unable to identify the wake-up code likely to "wake up".
Il est enfin à noter que l'invention peut s'appliquer à toute antenne extérieure, et notamment dans le cadre d'un véhicule utilitaire 1 doté d'une porte latérale, à une antenne extérieure positionnée au niveau de cette dernière. Finally, it should be noted that the invention can be applied to any external antenna, and in particular in the context of a utility vehicle 1 equipped with a side door, with an external antenna positioned at the latter.

Claims

REVENDICATIONS
1/ Procédé de neutralisation d'un boîtier portable de commande à distance (B), dit identifiant, lors de l'oubli de ce dernier dans une zone intérieure (3), dite zone utilitaire, d'un habitacle (2, 3) d'un véhicule (1 ) équipé d'un dispositif d'accès mains libres comportant notamment, outre le dit identifiant, au moins une antenne émettrice extérieure (9) d'émission de signaux d'identification à destination d'identifiants (B) situés à l'extérieur du véhicule (1 ), la dite antenne extérieure présentant une couverture (Z9) se divisant en deux zones consistant en une zone extérieure s'étendant à l'extérieur de l'habitacle (2, 3), et une zone intérieure (Zc) s'étendant à l'intérieur de l'habitacle (2, 3) dans la zone utilitaire (3) de ce dernier, le dit procédé de neutralisation étant caractérisé en ce qu'il consiste, pour chaque antenne extérieure (9) dont la couverture (Z9) s'étend partiellement dans la zone utilitaire (3) de l'habitacle (2, 3) :1 / A method of neutralizing a portable remote control unit (B), said identifier, when the latter is forgotten in an interior zone (3), called a utility zone, of a passenger compartment (2, 3) a vehicle (1) equipped with a hands-free access device including in particular, in addition to said identifier, at least one external transmitting antenna (9) for transmitting identification signals to identifiers (B) located outside the vehicle (1), said outer antenna having a cover (Z9) divided into two zones consisting of an outer zone extending outside the passenger compartment (2, 3), and a interior zone (Zc) extending inside the passenger compartment (2, 3) in the utility zone (3) thereof, the said neutralization method being characterized in that it consists, for each external antenna (9) whose cover (Z9) extends partially in the utility area (3) of the passenger compartment (2, 3):
• à installer dans la dite zone utilitaire une antenne émettrice intérieure (11 ) spécifique , dite contre antenne, positionnée et de puissance adaptée pour présenter une couverture (Z11 ) s'étendant dans l'habitacle (2, 3) et couvrant au moins la zone intérieure (Zc) de la couverture (Z9) de l'antenne extérieure (9),Installing in said utility zone a specific indoor antenna (11), said counter antenna, positioned and of suitable power to present a cover (Z11) extending in the passenger compartment (2, 3) and covering at least the inside zone (Zc) of the cover (Z9) of the outside antenna (9),
• et à commander, simultanément à l'émission de chaque signal d'identification par l'antenne extérieure (9), l'émission, par la contre antenne (11 ), d'un signal parasite conçu pour brouiller le dit signal d'identification.And controlling, simultaneously with the transmission of each identification signal by the external antenna (9), the emission, by the counter-antenna (11), of a parasitic signal designed to scramble the said signal of identification.
2/ Procédé de neutralisation selon la revendication 1 caractérisé en ce que l'on installe chaque contre antenne (11 ) spécifique en regard d'une antenne extérieure (9), de façon que la dite contre antenne et la dite antenne extérieure soient disposées en vis-à-vis de part et d'autre de la carrosserie délimitant l'habitacle (2, 3) du véhicule (1 ).2 / A method of neutralization according to claim 1 characterized in that one installs each against specific antenna (11) facing an external antenna (9), so that said counter antenna and said external antenna are arranged in vis-à-vis on both sides of the body defining the passenger compartment (2, 3) of the vehicle (1).
3/ Procédé de neutralisation selon l'une des revendications 1 ou 2 selon lequel chaque signal d'identification émis par une antenne extérieure (9) comporte une trame de données incorporant un préambule consistant en un code de réveil identifiable par un identifiant (B), caractérisé en ce que le signal parasite émis par chaque contre antenne (11 ) est conçu pour brouiller le préambule du signal d'identification.3 / method of neutralization according to one of claims 1 or 2 wherein each identification signal transmitted by an external antenna (9) comprises a data frame incorporating a preamble consisting of a wake up code identifiable by an identifier (B) , characterized in that the parasitic signal emitted by each counter antenna (11) is designed to scramble the preamble of the identification signal.
4/ Dispositif d'accès mains libres à un habitacle (2, 3) d'un véhicule (1 ) comprenant : • une unité centrale (6) embarquée dans le véhicule (1 ),4 / Device for free access to a passenger compartment (2, 3) of a vehicle (1) comprising: • a central unit (6) embedded in the vehicle (1),
• au moins un boîtier portable de commande à distance (B), dit identifiant, affecté au véhicule (1 ),At least one portable remote control unit (B), called identifier, assigned to the vehicle (1),
• et des moyens de transmission adaptés pour permettre d'instaurer un dialogue entre l'unité centrale (6) et chaque identifiant (B) et comprenant, notamment, embarquée dans le véhicule (1 ), au moins une antenne émettrice extérieure (9) d'émission de signaux d'identification à destination d'identifiants (B) situés à l'extérieur du véhicule (1 ), la dite antenne extérieure présentant une couverture (Z9) se divisant en deux zones consistant en une zone extérieure s'étendant à l'extérieur de l'habitacle (2, 3), et une zone intérieure (Zc) s'étendant à l'intérieur de l'habitacle (2, 3) dans une zone (3), dite zone utilitaire, de ce dernier, le dit dispositif d'accès mains libres étant caractérisé en ce que :And transmission means adapted to allow a dialogue to be established between the central unit (6) and each identifier (B) and comprising, in particular, embedded in the vehicle (1), at least one external transmitting antenna (9) the transmission of identification signals to identifiers (B) located outside the vehicle (1), said outer antenna having a cover (Z9) divided into two zones consisting of an outer zone extending outside the passenger compartment (2, 3), and an inner zone (Zc) s extending inside the passenger compartment (2, 3) in a zone (3), called the utility zone, of the latter, the said hands-free access device being characterized in that:
• il comprend, pour chaque antenne émettrice extérieure (9) dont la couverture s'étend partiellement dans la zone utilitaire (3) de l'habitacle (2, 3), une antenne émettrice (11 ) spécifique , dite contre antenne, installée dans la dite zone utilitaire, positionnée et de puissance adaptée pour présenter une couverture s'étendant dans l'habitacle (2, 3) et couvrant au moins la zone intérieure (Zc) de la couverture (Z9) de l'antenne extérieure (9),• it includes, for each external transmitting antenna (9) whose coverage extends partially in the utility area (3) of the passenger compartment (2, 3), a specific transmitting antenna (11), referred to as an antenna, installed in said utility zone, positioned and of power adapted to present a cover extending in the passenger compartment (2, 3) and covering at least the inner zone (Zc) of the cover (Z9) of the external antenna (9) ,
• l'unité centrale (6) est programmée pour commander, simultanément à l'émission de chaque signal d'identification par une antenne extérieure (9) dont la couverture s'étend partiellement dans la zone utilitaire (3) de l'habitacle (2, 3), l'émission, par la contre antenne (11 ) associée, d'un signal parasite conçu pour brouiller le dit signal d'identification. • the central unit (6) is programmed to control, simultaneously with the transmission of each identification signal by an external antenna (9) whose coverage extends partially in the utility zone (3) of the passenger compartment ( 2, 3), the emission by the associated counter antenna (11), a parasitic signal designed to scramble the said identification signal.
PCT/EP2008/003501 2007-05-04 2008-04-30 Method for neutralising a portable remote control unit lost in an interior region of a vehicle provided with a hands-free access device and corresponding hands-free access device WO2008135216A1 (en)

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FR0703240A FR2915839B1 (en) 2007-05-04 2007-05-04 METHOD FOR NEUTRALIZATION OF A PORTABLE REMOTE REMOTE CONTROL BOX IN AN INDOOR AREA OF A VEHICLE EQUIPPED WITH A HANDS-FREE ACCESS DEVICE, AND CORRESPONDING HANDS-FREE ACCESS DEVICE
FR0703240 2007-05-04

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WO2020177962A1 (en) * 2019-03-06 2020-09-10 Volkswagen Aktiengesellschaft Method for operating a locking system of a vehicle having separate interior sensing and exterior sensing of a key device, and locking system
US11834000B2 (en) 2019-03-06 2023-12-05 Volkswagen Aktiengesellschaft Method for operating a locking system of a vehicle having separate interior sensing and exterior sensing of a key device, and locking system

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