EP0867971A2 - Détecteur à champ magnétique pour un accès sans clef, en particulier pour un véhicule automobile - Google Patents

Détecteur à champ magnétique pour un accès sans clef, en particulier pour un véhicule automobile Download PDF

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Publication number
EP0867971A2
EP0867971A2 EP98105303A EP98105303A EP0867971A2 EP 0867971 A2 EP0867971 A2 EP 0867971A2 EP 98105303 A EP98105303 A EP 98105303A EP 98105303 A EP98105303 A EP 98105303A EP 0867971 A2 EP0867971 A2 EP 0867971A2
Authority
EP
European Patent Office
Prior art keywords
conductor loop
magnetic field
field sensor
sensor according
conductor
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.)
Granted
Application number
EP98105303A
Other languages
German (de)
English (en)
Other versions
EP0867971A3 (fr
EP0867971B1 (fr
Inventor
Martin Schulz
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Publication of EP0867971A2 publication Critical patent/EP0867971A2/fr
Publication of EP0867971A3 publication Critical patent/EP0867971A3/fr
Application granted granted Critical
Publication of EP0867971B1 publication Critical patent/EP0867971B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • 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
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • 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
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G07C2009/0019—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the keyless data carrier having only one limited data transmission rangs
    • 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
    • G07C2009/00777—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 induction

Definitions

  • the invention relates to a magnetic field sensor (antenna) for a keyless entry system especially in motor vehicles, with which the direction of incidence of a transmitter in the Near-field emitted electromagnetic radiation can be detected.
  • Keyless entry systems are known, for example, from DE 38 20 248 A1.
  • This system consists of a portable radio transmitter, a manually operated trigger switch arranged on the vehicle, a control device which is also connected to actuation devices and a further antenna arranged in or on the vehicle which consists of a first loop antenna with a magnetic field essentially parallel to the longitudinal axis of the vehicle and a there is a second loop antenna with an essentially transverse magnetic field to the longitudinal axis of the vehicle.
  • the second loop antenna is to be arranged between an outer surface and an inner surface of the vehicle near the trigger switch.
  • the proposed magnetic field sensor consists of at least a first and at least one a second conductor loop.
  • the first conductor loop is elongated (e.g. rectangular or ellipsoid with an aspect ratio that is significantly larger than 1).
  • the second Conductor loop is arranged concentrically to the first and is also constructed symmetrically.
  • the second conductor loop has a substantially constant center Distance (e.g. circular or square).
  • the second conductor loop forms one Reference, so that from the ratio of the voltages induced in the conductor loops Direction can be determined.
  • the magnetic sensor is for evaluation with a Processing unit connected.
  • the conductor loops are preferably one printed circuit executed essentially flat.
  • the conductor loops are preferably dimensioned such that those in the second conductor loop induced voltage is approximately the same order of magnitude as the resulting voltage in the crossed loop.
  • the first conductor loop has one in particular middle section in which the conductor loop crosses.
  • This conductor loop with about 8-shaped contour leads to a phase difference so that the output voltage to zero becomes the same in the sections of the conductor loop adjacent to the intersection Voltage is induced. The crossing results in an addition with different Polarity performed.
  • the first conductor loop preferably has two essentially symmetrical sections larger area, which are also arranged symmetrically. So that is the accuracy the direction determination improved. So it doesn't depend so much on the shape of the individual Sections on (e.g. round, angular, ellipsoid) but on their symmetry to the crossing point.
  • a third conductor loop is provided, which in Form and function of the first conductor loop corresponds, but in their plane perpendicular to this is arranged.
  • a processing device Determination of all four spatial directions lying in the plane of the magnetic sensor enables.
  • This can also be arranged at the front and rear of the vehicle Locking devices can be included in the keyless entry system.
  • the magnetic field sensor according to the invention is preferred in a circuit of a Motor vehicle used, which has at least one processing and control device has, which also with actuators for actuating the door locks and / or other devices (e.g. ignition circuit).
  • the magnetic field sensor according to the invention is based on the attached schematic Illustrated.
  • the magnetic field sensor 2 In motor vehicle 1, in particular in the area of the dashboard, is perpendicular to Vehicle longitudinal axis of the magnetic field sensor 2 consisting of the first conductor loop 3 and the second Conductor loop 4 arranged. In a central area of the first conductor loop 3 there are Crossed traces.
  • paddle-shaped ones are also available Versions with or without crossed conductor tracks are possible with those between the Sections 31, 32 of a larger area have a narrower, elongated section of a smaller area in the middle is arranged. In the version without crossed conductor tracks, the difference of induced voltages are formed electronically.
  • the magnetic field sensor will preferably tuned to a wavelength that is a multiple of a practical distance to the portable transmitter.
  • the magnetic field sensor 2 is provided with a processing and control device 5 to the actuating devices 6 are connected to unlock and lock the locks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Lock And Its Accessories (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measuring Magnetic Variables (AREA)
EP98105303A 1997-03-27 1998-03-24 Système pour un accès sans clef pour un véhicule automobile avec un détecteur à champ magnétique Expired - Lifetime EP0867971B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712911A DE19712911C2 (de) 1997-03-27 1997-03-27 Magnetfeldsensor für schlüsselloses Zugangssystem insbesondere bei Kraftfahrzeugen sowie Verwendung des Magnetfeldsensors in einem Schaltkreis eines Kraftfahrzeuges
DE19712911 1997-03-27

Publications (3)

Publication Number Publication Date
EP0867971A2 true EP0867971A2 (fr) 1998-09-30
EP0867971A3 EP0867971A3 (fr) 1998-10-07
EP0867971B1 EP0867971B1 (fr) 2004-06-02

Family

ID=7824808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105303A Expired - Lifetime EP0867971B1 (fr) 1997-03-27 1998-03-24 Système pour un accès sans clef pour un véhicule automobile avec un détecteur à champ magnétique

Country Status (4)

Country Link
US (1) US5940003A (fr)
EP (1) EP0867971B1 (fr)
JP (1) JPH1123682A (fr)
DE (2) DE19712911C2 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786030A1 (fr) * 1998-11-16 2000-05-19 Valeo Securite Habitacle Vehicule automobile equipe d'un dispositif identifieur assurant la commande d'organes de manoeuvre du vehicule lorsqu'un identifiant est detecte dans un espace predetermine
US6721611B2 (en) 1997-09-17 2004-04-13 Logitech Europe S.A. Antenna system and apparatus for radio-frequency wireless keyboard
DE10192529B4 (de) * 2000-07-19 2004-05-13 Logitech Europe S.A. Antennensystem
WO2017102106A1 (fr) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utilisation d'un véhicule à moteur
WO2017102104A1 (fr) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
WO2017102105A1 (fr) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
WO2017162317A1 (fr) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
WO2017162315A1 (fr) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
WO2017162318A1 (fr) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
US10543810B2 (en) 2016-03-22 2020-01-28 Bayerische Motoren Werke Aktiengesellschaft Authorizing the use of a motor vehicle

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7388370B2 (en) 2005-07-29 2008-06-17 Automotive Systems Laboratory Systems, Inc. Magnetic crash sensor
DE10014302A1 (de) * 2000-03-23 2001-10-04 Infineon Technologies Ag Antennenanordnung
GB2371137B (en) 2000-09-19 2004-06-16 Land Rover Uk Ltd A security system
DE10046897B4 (de) * 2000-09-21 2004-02-05 Siemens Ag Sende- und Empfangsverfahren, insbesondere zum Detektieren eines ID-Gebers
JP3587185B2 (ja) 2001-09-28 2004-11-10 オムロン株式会社 誘導無線アンテナ、およびこれを用いた非接触データ通信装置
DE10159604A1 (de) 2001-12-05 2003-06-12 Atmel Germany Gmbh Verfahren zur Erkennung einer Weiterleitung bei einer kontaktlosen Datenübertragung
US6724322B2 (en) 2001-12-21 2004-04-20 Lear Corporation Remote system for providing vehicle information to a user
DE10309600A1 (de) * 2003-03-05 2004-09-16 Delphi Technologies, Inc., Troy Sicherungssystem
EP1663732A2 (fr) * 2003-09-19 2006-06-07 Automotive Systems Laboratory Inc. Procede magnetique pour detecter un impact
US7463987B2 (en) * 2003-09-19 2008-12-09 Takata Holdings, Inc. Magnetic sensing system and method
DE102005013910B3 (de) 2005-03-24 2006-09-28 Siemens Ag Verfahren für ein Start- und Zugangssystem für ein Kraftfahrzeug
EP1932213B1 (fr) * 2005-09-12 2020-11-25 Sato Holdings Corporation Conception d'antenne et systeme d'interrogation
WO2015200264A1 (fr) 2014-06-24 2015-12-30 Google Inc. Contrôleur magnétique pour commande de dispositif
DE102015213806A1 (de) 2015-07-22 2017-01-26 Volkswagen Aktiengesellschaft Positionsbestimmung mit einem Magnetfeldsensor für ein Fahrzeug
DE102015016558B4 (de) 2015-12-18 2026-02-05 Bayerische Motoren Werke Aktiengesellschaft Autorisierung der Nutzung eines Kraftfahrzeugs
DE102016111707B4 (de) 2016-06-27 2019-08-14 Volkswagen Aktiengesellschaft Verfahren und System zum Erfassen einer Relativposition eines mobilen Endgeräts in Bezug auf ein Fahrzeug

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JPS58139010A (ja) * 1982-02-15 1983-08-18 Nissan Motor Co Ltd 車両用走行誘導装置
JPS61196080A (ja) * 1985-02-21 1986-08-30 日産自動車株式会社 無線式利用者識別装置
JPS6278379A (ja) * 1985-09-30 1987-04-10 日産自動車株式会社 車両用施解錠制御装置
NL8603005A (nl) * 1986-11-27 1988-06-16 Philips Nv Magnetisch resonantie apparaat met flexibele quadratuur spoelenstelsel.
JP2546842B2 (ja) * 1987-06-16 1996-10-23 日産自動車株式会社 車両用施解錠制御装置
US5293160A (en) * 1989-11-02 1994-03-08 Nissan Motor Company, Ltd. Keyless vehicle lock system with distance measuring
DE4005079A1 (de) * 1990-02-17 1991-08-22 Dornier Gmbh Vorrichtung zur vollstaendigen bestimmung des gradiententensors eines magnetfelds
US5099247A (en) * 1990-12-14 1992-03-24 General Electric Company Electronic steering of pattern of an antenna system
DE4232827B4 (de) * 1992-09-30 2004-08-05 Siemens Ag Zirkular polarisierte Lokal-Antennenanordnung für ein Kernspintomographiegerät
US5519318A (en) * 1992-12-28 1996-05-21 The United States Of America As Represented By The Secretary Of The Navy Triaxial magnetic heading sensing apparatus having magnetaresistors and nulling coils
US5459395A (en) * 1993-07-06 1995-10-17 General Electric Company Reduced flux current sensor
EP0650074A1 (fr) * 1993-10-22 1995-04-26 Texas Instruments Holland B.V. Système précis de localisation et d'identification à haute fréquence
US5532709A (en) * 1994-11-02 1996-07-02 Ford Motor Company Directional antenna for vehicle entry system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6721611B2 (en) 1997-09-17 2004-04-13 Logitech Europe S.A. Antenna system and apparatus for radio-frequency wireless keyboard
FR2786030A1 (fr) * 1998-11-16 2000-05-19 Valeo Securite Habitacle Vehicule automobile equipe d'un dispositif identifieur assurant la commande d'organes de manoeuvre du vehicule lorsqu'un identifiant est detecte dans un espace predetermine
DE10192529B4 (de) * 2000-07-19 2004-05-13 Logitech Europe S.A. Antennensystem
US10640085B2 (en) 2015-12-18 2020-05-05 Bayerische Motoren Wekre Aktiengesellschaft Authorizing the use of a motor vehicle
WO2017102106A1 (fr) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utilisation d'un véhicule à moteur
WO2017102104A1 (fr) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
WO2017102105A1 (fr) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
US10836351B2 (en) 2015-12-18 2020-11-17 Bayerische Motoren Werke Aktiengesellschaft Authorizing the use of a motor vehicle
US10703334B2 (en) 2015-12-18 2020-07-07 Bayerische Motoren Werke Aktiengesellschaft Authorizing the use of a motor vehicle
WO2017162318A1 (fr) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
US10543810B2 (en) 2016-03-22 2020-01-28 Bayerische Motoren Werke Aktiengesellschaft Authorizing the use of a motor vehicle
US10611340B2 (en) 2016-03-22 2020-04-07 Bayerische Motoren Werke Aktiengesellschaft Authorizing the use of a motor vehicle
US10614643B2 (en) 2016-03-22 2020-04-07 Bayerische Motoren Werke Aktiengesellschaft Authorizing the use of a motor vehicle
US10538219B2 (en) 2016-03-22 2020-01-21 Bayerische Motoren Werke Aktiengesellschaft Authorizing the use of a motor vehicle
WO2017162315A1 (fr) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur
WO2017162317A1 (fr) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Autorisation d'utiliser un véhicule à moteur

Also Published As

Publication number Publication date
JPH1123682A (ja) 1999-01-29
EP0867971A3 (fr) 1998-10-07
DE19712911C2 (de) 2001-09-13
DE59811489D1 (de) 2004-07-08
DE19712911A1 (de) 1998-10-08
EP0867971B1 (fr) 2004-06-02
US5940003A (en) 1999-08-17

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