EP2652719B1 - Elektronisches kommunikationsmodul zum verriegeln/entriegeln einer beweglichen platte eines kraftfahrzeugs, entsprechende cpu und freihand-zugangssystem - Google Patents

Elektronisches kommunikationsmodul zum verriegeln/entriegeln einer beweglichen platte eines kraftfahrzeugs, entsprechende cpu und freihand-zugangssystem Download PDF

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Publication number
EP2652719B1
EP2652719B1 EP11797317.2A EP11797317A EP2652719B1 EP 2652719 B1 EP2652719 B1 EP 2652719B1 EP 11797317 A EP11797317 A EP 11797317A EP 2652719 B1 EP2652719 B1 EP 2652719B1
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EP
European Patent Office
Prior art keywords
hands
free access
access system
communication module
voltage
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EP11797317.2A
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English (en)
French (fr)
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EP2652719A1 (de
Inventor
Eric Leconte
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
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Valeo Securite Habitacle SAS
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Publication of EP2652719A1 publication Critical patent/EP2652719A1/de
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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
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence
    • 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
    • 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
    • G07C2009/00365—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 in combination with a wake-up circuit
    • G07C2009/00373—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 in combination with a wake-up circuit whereby the wake-up circuit is situated in the lock
    • 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
    • G07C2209/65—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle using means for sensing the user's hand

Definitions

  • the present invention relates to an electronic communication module for locking / unlocking at least one opening of a motor vehicle as well as a central control unit of a hands-free access system for controlling such an electronic module. Communication.
  • the invention also relates to a hands-free access system comprising such an electronic communication module and its associated central control unit.
  • Hands-free access systems for motor vehicles are designed so that a user carrying an identification device (badge or other portable identifier) can unlock and / or lock his vehicle without having to manipulate a key or remote control.
  • part of the on-board system on the vehicle comprises means of communication capable of communicating with the identification device by exchange of electromagnetic signals with a view to authentication prior to an effective unlocking request. locking of at least one vehicle opening.
  • authentication comprises a first interrogation step during which the communication means transmit a low-frequency interrogation signal in the immediate vicinity of the vehicle. If a badge is present in this neighborhood, it transmits in return a response signal, preferably in radio frequency, to allow its authentication.
  • the transmission of the interrogation signal is preferably triggered only if the system has been able to detect the presence of the user beforehand. It is thus known (see EP1213687 or FR2921958 ) to position on the opening of the vehicle, preferably at the level of the handle of the opening, a capacitive sensor, used as an approach sensor or as a tactile sensor. When the user brings his hand to the handle or touches the sensor to open the door, his presence is detected, the interrogation is triggered, so that, in the event of positive authentication, the unlocking is effective when the user pulls the handle to open the door. Some systems even combine a capacitive approach sensor for unlocking and a capacitive touch sensor for locking.
  • Hands-free access systems are also already known in which the means for transmitting the low-frequency interrogation signal and the presence detection means (sensors and / or switch button) are combined in a single electronic communication module. , intended to be integrated at the level of the opening, preferably in the handle of the opening.
  • the elements of the system necessary for the generation of the low-frequency interrogation signal, for the power supply and for the control of the electronic communication module are preferably deported with respect to this module, and united in a central control unit. control placed inside the vehicle.
  • the central control unit is connected to the electronic communication module by means of an electrical connection harness with several wires.
  • connection harness needed to connect the electronic communication module and the central control unit.
  • a bundle with several wires generally made of copper, has both a material cost and a significant labor cost during its manufacture, but also during its installation and maintenance of the vehicle.
  • the document EP 1 700 390 B1 describes an architecture in which the low-frequency transmitting antenna is connected in parallel to the capacitive sensors at the level of the electronic communication module, and in which the two wires of a connection bundle necessary for the DC voltage supply to the sensors are used to control the transmitting antenna and to pass the interrogation signal to be transmitted.
  • the detection circuit comprises for example a means for measuring the current flowing between said first wire and the connection to the DC voltage source, typically a current mirror, capable of delivering an output voltage representative of said current, and a voltage comparator with two inputs able to compare said output voltage with a reference voltage and to deliver said output signal as a function of the comparison.
  • the central unit preferably comprises a switch means in series with the current measuring means, and the microcontroller is able to control the opening or closing of the switch means depending on whether the switch button is in the state. respectively closed or open.
  • the detection circuit may include a resistor in series between the first wire and the connection to the DC voltage source, and a two-input voltage comparator capable of comparing a voltage across the resistor with a reference voltage. and delivering said output signal as a function of the comparison.
  • a hands-free access system 1 in accordance with the present invention comprises an electronic communication module 2 capable of transmitting a low-frequency interrogation signal to a badge or portable identifier. (not shown), and a central unit 3 capable of controlling the electronic communication module 2.
  • the system further comprises an electrical connection harness with two wires 4, 5 electrically connecting the central control unit 3 to the electronic communication module 2.
  • the electronic communication module 2 is used for locking / unlocking at least one motor vehicle opening, and conventionally comprises for this purpose a resonant circuit adapted to a tuning frequency comprising a coil 20 emission wound around a ferrite core (represented here by the series association of an inductance L and a resistor R 1 ) in series with a tuning capacitor 21.
  • the resonant circuit 20, 21 is thus able, under the control of the central unit 3 which will be explained later, to emit a low-frequency interrogation signal at said tuning frequency (typically of the order of 125 kHz) to destination of a badge or portable identifier possibly present in the transmission zone associated with the resonant circuit forming the low frequency transmission antenna.
  • the module 2 furthermore comprises a manually actuated trigger member, the actuation of which triggers the emission of said interrogation signal.
  • the trigger member is a switch button 22 connected in series with at least one resistor 23 to form an electric dipole 24 electrically connected in parallel across the entire resonant circuit.
  • the electric dipole 24 is electrically connected in parallel on only part of the resonant circuit, in particular at the terminals of the tuning capacitor 21.
  • the presence of the resistor 23 in the electric dipole 22 makes it possible to reduce the disturbances that would cause a prolonged press of a user on the switch button 22 while the resonant circuit is activated for the emission of the signal d. 'interrogation.
  • an additional inductor (not shown) can advantageously be incorporated into the electric dipole, in series with the resistor 23 and the switch button 22, so as to increase the filtering of the low frequency.
  • a compact module is obtained which can be easily integrated for example at the level of the handle of an opening of the vehicle, with only two connection terminals 25, 26 for the connection of the module 2 to the central control unit 3. via the two wires respectively 4 and 5.
  • the electronic communication module comprises a single printed circuit board (not shown) on which all the components, namely the components of the resonant circuit on the one hand, and the components of the electric dipole 24 on the other hand, are mounted.
  • the module 2 comprises a single printed circuit board (not shown) on which only the electric dipole 24 and the tuning capacitor 21 are mounted.
  • the coil 20 is in this case electrically connected to the printed circuit board, without however resting on the latter. This arrangement makes it possible to offer more flexibility as to the implantation of the coil 20.
  • the central control unit 3 is able to control this electronic communication module 2 by means of the two wires 4, 5 of the electrical connection harness for d 'on the one hand, detecting the actuation of the switch button, and on the other hand, triggering the transmission of the low-frequency interrogation signal.
  • the DC + Vcc power source is typically formed by the vehicle battery.
  • the detection circuit comprises on the one hand, a current measuring means 31, for example a current mirror, capable of measuring the current flowing between the first wire 4 and the terminal for connection to the DC voltage source + Vcc and in delivering an output voltage V I representative of this current, and on the other hand, a voltage comparator 32 with two inputs receiving the voltage V I delivered at the output of the current measuring means 31, and a reference voltage, for example the supply voltage + Vcc, and delivering the output signal representative of the open or closed state of the switch button 22.
  • a current measuring means 31 for example a current mirror, capable of measuring the current flowing between the first wire 4 and the terminal for connection to the DC voltage source + Vcc and in delivering an output voltage V I representative of this current
  • a voltage comparator 32 with two inputs receiving the voltage V I delivered at the output of the current measuring means 31, and a reference voltage, for example the supply voltage + Vcc, and delivering the output signal representative of the open or closed state of the switch button 22.
  • the module 2 When the switch means 34, 35 are closed, the module 2 is connected to the DC power source via the first wire 4, and to the electrical ground via the second wire 5. When the switch means 34 , 35 are open, the module 2 is only connected to the low frequency voltage generator 30.
  • the microcontroller 33 makes the connection of wire 4 to the DC + V DC power source effective, the other connection wire 5 being connected to the electrical ground.
  • the switch means 34, 35 are therefore controlled respectively by the control signals S C1 and S C2 to be in the closed position.
  • comparator 32 delivered to microcontroller 33 therefore clearly reflects, depending on the result of the comparison, the open or closed state of switch button 22.
  • the microcontroller 33 controls the disconnection of the module 2, typically of the first wire 4, from the source of direct voltage + Vcc thanks to control signals Sci, S C2 controlling the opening of the switching means 34, 35.
  • the microcontroller 33 generates a control signal Sc3 intended for the low-frequency voltage generator 30 so that the latter delivers a low-frequency power supply signal (modulated in amplitude and / or in frequency) to the resonant circuit, and that the transmission coil 20 consequently emits the interrogation signal.
  • the central unit 3 then returns to the initial idle state (switch means 34, 35 closed again).
  • the control unit 3 only requires two connection terminals 36, 37 to be electrically connected to the two corresponding terminals 25, 26 of the communication module 2 via the two wires 4 and 5.
  • the two wires 4, 5 are thus used either to supply the module with direct voltage and consequently allow the monitoring of the activation of the control button, or to pass the low-frequency power supply signal for the transmission of the signal. interrogation.
  • Capacitors 38, 39 are advantageously provided between the low frequency generator 30 and the switching means 34, 35 to prevent the passage of current to the generator 30 when these switching means are in the closed position.
  • the figure 3 illustrates an alternative embodiment of the central unit 3, or more precisely of the detection circuit.
  • the current measuring means 31 of the figures 2 and 3 has been replaced by a resistor 31 'in series between the first wire 4 and the terminal for connection to the source of direct voltage + Vcc.
  • This resistor 31 ' forms, with the resistor 23 of the module 2, a divider bridge. Monitoring of the voltage across this resistor 31 'thus makes it possible to detect the open or closed state of the switch button. More precisely, when the switch button 22 is in the open state, the voltage V I across this resistor is equal to the direct voltage + Vcc.
  • a voltage comparator 32 with two inputs receiving the voltage V I at the terminals of the resistor 31 ', and a reference voltage, for example the supply voltage + Vcc, delivers to the microcontroller 33 the output signal representative of the open or closed state of the switch button 22.
  • the microcontroller 33 commands the opening of the switch means 35.
  • the microcontroller 33 generates a control signal Sc3 intended for the voltage generator 30. low frequency so that the latter delivers a low frequency supply signal (amplitude and / or frequency modulated) to the resonant circuit, and that the transmission coil 20 consequently emits the interrogation signal.
  • the central unit 3 then returns to the initial idle state (switch means 35 again closed).
  • the advantage of this variant compared to that described with reference to figures 1 and 2 lies in the fact that by choosing a sufficiently high resistance 31 ', it is possible to dispense with the presence of the switch means 34, and consequently the generation of the associated control signal S C1. It will be noted that the variant embodiment of the central unit 3 shown in figure 3 is suitable for controlling module 2 of the figure 1 than when ordering module 2 shown in figure 2 .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)
  • Transmitters (AREA)

Claims (10)

  1. Freihand-Zugangssystem (1) für ein Kraftfahrzeug, das ein elektronisches Kommunikationsmodul, das ein niederfrequentes Abfragesignal an ein Badge oder eine tragbare Kennung senden kann, eine zentrale Steuereinheit (3), die das Kommunikationsmodul steuern kann, und ein elektronisches Zweidraht-Verbindungsbündel (4, 5) aufweist, das die zentrale Steuereinheit (3) elektrisch mit dem elektronischen Kommunikationsmodul (2) verbindet, wobei das elektronische Kommunikationsmodul (2) einen Schwingkreis, der an eine Abstimmfrequenz angepasst ist und eine Sendespule (20) in Reihe mit einer Abstimmkapazität (21) enthält, wobei der Schwingkreis (20, 21) ein niederfrequentes Abfragesignal auf der Abstimmfrequenz an ein Badge oder eine tragbare Kennung senden kann, und ein Auslöseorgan (22) mit manueller Betätigung aufweist, dessen Betätigung verwendet wird, um das Senden des Abfragesignals auszulösen, wobei das System dadurch gekennzeichnet ist, dass das Auslöseorgan ein Druckknopfschalter (22) ist, der in Reihe mit mindestens einem Widerstand (23) verbunden ist, um einen elektrischen Dipol (24) zu formen, und dass der elektrische Dipol (24) elektrisch über den ganzen oder einen Teil des Schwingkreises (20, 21) parallel verbunden ist, wobei das System außerdem dadurch gekennzeichnet ist, dass die zentrale Steuereinheit (3) konfiguriert ist, das elektronische Kommunikationsmodul (2) mittels des elektrischen Zweidraht-Verbindungsbündels (4, 5) zu steuern, wobei die Zentraleinheit (3) aufweist:
    - einen Niederfrequenzspannungsgenerator (30), der elektrisch mit den Klemmen des Schwingkreises (20) des elektronischen Kommunikationsmoduls (2) mittels der zwei Drähte (4, 5) des Verbindungsbündels zum Senden des Abfragesignals verbunden werden kann;
    - eine Verbindung mit einer elektrischen Gleichspannungsquelle (+Vcc), die das elektronische Modul (2) mit der Quelle über einen ersten Draht (4) der zwei Drähte des Verbindungsbündels verbinden kann;
    - einen Erfassungskreis (31, 32; 31', 32), der ein für den offenen oder geschlossenen Zustand des Druckknopfschalters (22) repräsentatives Ausgangssignal liefern kann; und
    - einen Mikrocontroller (33), der konfiguriert ist, das Ausgangssignal vom Erfassungskreis (31, 32; 31', 32) zu empfangen und, wenn der Erfassungskreis (31, 32; 31', 32) einen geschlossenen Zustand des Druckknopfschalters (20) erfasst, die Erzeugung durch den Niederfrequenzspannungsgenerator (30) eines niederfrequenten Versorgungssignals des Schwingkreises zum Senden des Abfragesignals zu steuern, wobei der Erfassungskreis (31, 32) eine Messeinrichtung (31) des zwischen dem ersten Draht (4) und der Verbindung mit der Gleichspannungsquelle (+Vcc) fließenden Stroms, die konfiguriert ist, eine für den Strom repräsentative Ausgangsspannung (VI) zu liefern, und einen Stromkomparator (32) mit zwei Eingängen aufweist, der konfiguriert ist, die Ausgangsspannung mit einer Bezugsspannung zu vergleichen und das Ausgangssignal abhängig von dem Vergleich zu liefern.
  2. Freihand-Zugangssystem (1) nach Anspruch 1, dadurch gekennzeichnet, dass der elektrische Dipol (24) elektrisch mit den Klemmen der Abstimmkapazität (21) verbunden ist.
  3. Freihand-Zugangssystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das elektronische Modul (2) in einen Griff eines Öffnungselements des Fahrzeugs eingebaut werden kann.
  4. Freihand-Zugangssystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das elektronische Modul (2) eine einzige Leiterplatte aufweist, auf die der Schwingkreis (20, 21) und der elektrische Dipol (24) montiert sind.
  5. Freihand-Zugangssystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das elektronische Modul (2) eine einzige Leiterplatte aufweist, auf die nur der elektrische Dipol (24) und die Abstimmkapazität (21) montiert sind.
  6. Freihand-Zugangssystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das elektronische Modul (2) eine einzige Leiterplatte aufweist, auf die nur der Schwingkreis (20, 21) und der Widerstand (23) montiert sind.
  7. Freihand-Zugangssystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der elektrische Dipol (24) eine zusätzliche Induktivität in Reihe mit dem Widerstand (23) und dem Druckknopfschalter (22) aufweist.
  8. Freihand-Zugangssystem (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Strommesseinrichtung (31) ein Stromspiegel ist.
  9. Freihand-Zugangssystem (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zentrale Steuereinheit (3) außerdem eine Schaltereinrichtung (34) in Reihe mit der Strommesseinrichtung (31) aufweist, und dass der Mikrocontroller (33) das Öffnen oder Schließen der Schaltereinrichtung (34) steuern kann, je nachdem, ob der Druckknopfschalter (22) im geschlossenen bzw. offenen Zustand ist.
  10. Freihand-Zugangssystem (1) nach Anspruch 1, wobei der Erfassungskreis (31', 32) einen Widerstand (31') in Reihe zwischen dem ersten Draht (4) und der Verbindung mit der Gleichspannungsquelle (+Vcc) und einen Spannungskomparator (32) mit zwei Eingängen aufweist, der eine Spannung an den Klemmen des Widerstands mit einer Bezugsspannung vergleichen und das Ausgangssignal abhängig von dem Vergleich liefern kann.
EP11797317.2A 2010-12-15 2011-12-14 Elektronisches kommunikationsmodul zum verriegeln/entriegeln einer beweglichen platte eines kraftfahrzeugs, entsprechende cpu und freihand-zugangssystem Active EP2652719B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1004895A FR2969430B1 (fr) 2010-12-15 2010-12-15 Module electronique de communication pour le verrouillage/deverrouillage d'un ouvrant de vehicule automobile, unite centrale de commande associee et systeme d'acces mains-libres
PCT/EP2011/072749 WO2012080328A1 (fr) 2010-12-15 2011-12-14 Module electronique de communication pour le verrouillage/deverrouillage d'un ouvrant de vehicule automobile, unite centrale de commande associee et systeme d'acces mains-libres

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Publication Number Publication Date
EP2652719A1 EP2652719A1 (de) 2013-10-23
EP2652719B1 true EP2652719B1 (de) 2021-04-07

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US (1) US9996994B2 (de)
EP (1) EP2652719B1 (de)
JP (1) JP6170436B2 (de)
CN (1) CN103430221B (de)
FR (1) FR2969430B1 (de)
WO (1) WO2012080328A1 (de)

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US9996994B2 (en) 2018-06-12
JP2014506306A (ja) 2014-03-13
WO2012080328A1 (fr) 2012-06-21
CN103430221A (zh) 2013-12-04
JP6170436B2 (ja) 2017-07-26
FR2969430A1 (fr) 2012-06-22
FR2969430B1 (fr) 2014-09-05
US20140077926A1 (en) 2014-03-20
EP2652719A1 (de) 2013-10-23
CN103430221B (zh) 2017-10-03

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