EP0867971A3 - Magnetic field sensor for a keyless entry system, especially for a motor vehicle - Google Patents

Magnetic field sensor for a keyless entry system, especially for a motor vehicle Download PDF

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Publication number
EP0867971A3
EP0867971A3 EP98105303A EP98105303A EP0867971A3 EP 0867971 A3 EP0867971 A3 EP 0867971A3 EP 98105303 A EP98105303 A EP 98105303A EP 98105303 A EP98105303 A EP 98105303A EP 0867971 A3 EP0867971 A3 EP 0867971A3
Authority
EP
European Patent Office
Prior art keywords
magnetic field
field sensor
entry system
keyless entry
motor vehicle
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)
French (fr)
Other versions
EP0867971B1 (en
EP0867971A2 (en
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/en
Publication of EP0867971A3 publication Critical patent/EP0867971A3/en
Application granted granted Critical
Publication of EP0867971B1 publication Critical patent/EP0867971B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Abstract

Die Erfindung betrifft einen Magnetfeldsensor (2) für ein schlüsselloses Zugangssystem insbesondere bei Kraftfahrzeugen (1), mit dem die Einfallsrichtung einer von einem Sender im Nahfeld ausgestrahlten elektromagnetischen Strahlung detektiert werden kann. Der Magnetfeldsensor (2) besteht aus wenigstens einer ersten (3) und wenigstens einer zweiten Leiterschleife (4), die im wesentlichen konzentrisch zueinander angeordnet und zum Zentrum im wesentlichen symmetrisch aufgebaut sind, wobei vorzugsweise die erste Leiterschleife (3) in ihrem mittigen Abschnitt gekreuzt verläuft. Die Empfangssignale der ersten und zweiten Leiterschleife werden einer Verarbeitungs- und Steuereinheit (5) zugeführt, die eine Betätigungsvorrichtung (6) zum Entriegeln und Verriegeln der Schlösser ansteuert.

Figure 00000001
The invention relates to a magnetic field sensor (2) for a keyless entry system, in particular in motor vehicles (1), with which the direction of incidence of electromagnetic radiation emitted by a transmitter in the near field can be detected. The magnetic field sensor (2) consists of at least one first (3) and at least one second conductor loop (4), which are arranged essentially concentrically to one another and are constructed essentially symmetrically to the center, the first conductor loop (3) preferably being crossed in its central section runs. The received signals of the first and second conductor loops are fed to a processing and control unit (5) which controls an actuating device (6) for unlocking and locking the locks.
Figure 00000001
EP98105303A 1997-03-27 1998-03-24 Keyless entry system for a motor vehicle with a magnetic field sensor Expired - Lifetime EP0867971B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712911 1997-03-27
DE19712911A DE19712911C2 (en) 1997-03-27 1997-03-27 Magnetic field sensor for keyless entry system, particularly in motor vehicles, and use of the magnetic field sensor in a circuit of a motor vehicle

Publications (3)

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

Family

ID=7824808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105303A Expired - Lifetime EP0867971B1 (en) 1997-03-27 1998-03-24 Keyless entry system for a motor vehicle with a magnetic field sensor

Country Status (4)

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

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US6138050A (en) * 1997-09-17 2000-10-24 Logitech, Inc. Antenna system and apparatus for radio-frequency wireless keyboard
FR2786030B1 (en) * 1998-11-16 2001-09-07 Valeo Securite Habitacle AUTOMOTIVE VEHICLE EQUIPPED WITH AN IDENTIFIER DEVICE PROVIDING CONTROL OF VEHICLE OPERATING DEVICES WHEN AN IDENTIFIER IS DETECTED IN A PREDETERMINED SPACE
DE10014302A1 (en) * 2000-03-23 2001-10-04 Infineon Technologies Ag Antenna conductor arrangement for Ident system has figure-eight shape with spaced apart sections at intersection point
US6356243B1 (en) * 2000-07-19 2002-03-12 Logitech Europe S.A. Three-dimensional geometric space loop antenna
DE60107512T2 (en) * 2000-09-19 2005-12-15 Land Rover, Lighthorne security system
DE10046897B4 (en) * 2000-09-21 2004-02-05 Siemens Ag Transmitting and receiving methods, in particular for detecting an ID transmitter
JP3587185B2 (en) 2001-09-28 2004-11-10 オムロン株式会社 Inductive wireless antenna and non-contact data communication device using the same
DE10159604A1 (en) * 2001-12-05 2003-06-12 Atmel Germany Gmbh Method for detecting a forwarding in a contactless data transmission
US6724322B2 (en) 2001-12-21 2004-04-20 Lear Corporation Remote system for providing vehicle information to a user
DE10309600A1 (en) * 2003-03-05 2004-09-16 Delphi Technologies, Inc., Troy security system
US7463987B2 (en) * 2003-09-19 2008-12-09 Takata Holdings, Inc. Magnetic sensing system and method
JP2007510134A (en) * 2003-09-19 2007-04-19 オートモーティブ システムズ ラボラトリー インコーポレーテッド Magnetic collision detection method
DE102005013910B3 (en) 2005-03-24 2006-09-28 Siemens Ag Method for a start and access system for a motor vehicle
EP1915585A2 (en) 2005-07-29 2008-04-30 Automotive Systems Laboratory Inc. Magnetic crash sensor
ES2851149T3 (en) * 2005-09-12 2021-09-03 Sato Holdings Corp Antenna design and interrogator system
KR101901366B1 (en) 2014-06-24 2018-09-21 구글 엘엘씨 Magnetic controller for device control
DE102015213806A1 (en) 2015-07-22 2017-01-26 Volkswagen Aktiengesellschaft Position determination with a magnetic field sensor for a vehicle
DE102015016553A1 (en) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Authorization of the use of a motor vehicle
DE102015016558A1 (en) 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Authorization of the use of a motor vehicle
DE102015016552A1 (en) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Authorization of the use of a motor vehicle
DE102015016557A1 (en) * 2015-12-18 2017-06-22 Bayerische Motoren Werke Aktiengesellschaft Authorization of the use of a motor vehicle
DE102016204746A1 (en) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Authorization of the use of a motor vehicle
DE102016204748A1 (en) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Authorization of the use of a motor vehicle
DE102016204749A1 (en) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Authorization of the use of a motor vehicle
DE102016204750A1 (en) 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Authorization of the use of a motor vehicle
DE102016111707B4 (en) 2016-06-27 2019-08-14 Volkswagen Aktiengesellschaft Method and system for detecting a relative position of a mobile terminal with respect to a vehicle

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE3820248A1 (en) * 1987-06-16 1989-01-05 Nissan Motor Keyless actuating system for a vehicle-locking device
US4816765A (en) * 1986-11-27 1989-03-28 U.S. Philips Corporation Magnetic resonance imaging apparatus comprising a quadrature coil system
US4873530A (en) * 1985-09-30 1989-10-10 Nissan Motor Co., Ltd. Antenna device in automotive keyless entry system
US4973958A (en) * 1985-02-21 1990-11-27 Nissan Motor Company, Limited Keyless entry system for automotive devices antenna device allowing low power radio signal communication
US5293160A (en) * 1989-11-02 1994-03-08 Nissan Motor Company, Ltd. Keyless vehicle lock system with distance measuring
DE4232827A1 (en) * 1992-09-30 1994-03-31 Siemens Ag Circularly polarised local antenna arrangement for nuclear spin tomography appts. - has array of three or more linearly polarised coils overlapped to achieve geometric decoupling.
US5594448A (en) * 1993-10-22 1997-01-14 Texas Instruments Incorporated Highly accurate RF-ID positioning system

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DE4005079A1 (en) * 1990-02-17 1991-08-22 Dornier Gmbh Magnetic field gradient tensor measurement - uses five or more planar gradiometers on three or more non-parallel surfaces
US5099247A (en) * 1990-12-14 1992-03-24 General Electric Company Electronic steering of pattern of an antenna system
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
US5532709A (en) * 1994-11-02 1996-07-02 Ford Motor Company Directional antenna for vehicle entry system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4973958A (en) * 1985-02-21 1990-11-27 Nissan Motor Company, Limited Keyless entry system for automotive devices antenna device allowing low power radio signal communication
US4873530A (en) * 1985-09-30 1989-10-10 Nissan Motor Co., Ltd. Antenna device in automotive keyless entry system
US4816765A (en) * 1986-11-27 1989-03-28 U.S. Philips Corporation Magnetic resonance imaging apparatus comprising a quadrature coil system
DE3820248A1 (en) * 1987-06-16 1989-01-05 Nissan Motor Keyless actuating system for a vehicle-locking device
US5293160A (en) * 1989-11-02 1994-03-08 Nissan Motor Company, Ltd. Keyless vehicle lock system with distance measuring
DE4232827A1 (en) * 1992-09-30 1994-03-31 Siemens Ag Circularly polarised local antenna arrangement for nuclear spin tomography appts. - has array of three or more linearly polarised coils overlapped to achieve geometric decoupling.
US5594448A (en) * 1993-10-22 1997-01-14 Texas Instruments Incorporated Highly accurate RF-ID positioning system

Also Published As

Publication number Publication date
DE19712911A1 (en) 1998-10-08
EP0867971B1 (en) 2004-06-02
JPH1123682A (en) 1999-01-29
DE19712911C2 (en) 2001-09-13
DE59811489D1 (en) 2004-07-08
EP0867971A2 (en) 1998-09-30
US5940003A (en) 1999-08-17

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