EP1723615A1 - Composant inductif, en particulier pour cle electronique - Google Patents

Composant inductif, en particulier pour cle electronique

Info

Publication number
EP1723615A1
EP1723615A1 EP05715905A EP05715905A EP1723615A1 EP 1723615 A1 EP1723615 A1 EP 1723615A1 EP 05715905 A EP05715905 A EP 05715905A EP 05715905 A EP05715905 A EP 05715905A EP 1723615 A1 EP1723615 A1 EP 1723615A1
Authority
EP
European Patent Office
Prior art keywords
coil
coils
electrical component
inductive electrical
signal
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
EP05715905A
Other languages
German (de)
English (en)
Other versions
EP1723615B1 (fr
Inventor
Johannes Mattes
Wolfgang Stehle
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.)
Marquardt GmbH
Original Assignee
Marquardt GmbH
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 Marquardt GmbH filed Critical Marquardt GmbH
Publication of EP1723615A1 publication Critical patent/EP1723615A1/fr
Application granted granted Critical
Publication of EP1723615B1 publication Critical patent/EP1723615B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • G07C9/00944—Details of construction or manufacture
    • 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
    • H01Q1/3241—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 particular used in keyless entry systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • 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
    • H01Q7/06—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 with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core

Definitions

  • Inductive component especially for an electronic key
  • the invention relates to an inductive electrical component according to the preamble of patent claim 1.
  • Such an inductive electrical component is used in particular in an electronic key, an ID transmitter, a chip card or the like (hereinafter generally referred to as an electronic key) for keyless entry / go systems in motor vehicles for inside / outside recognition.
  • Electronic keys from KeylessEntry / Go systems are moved or carried by the user. They are therefore subject to constant miniaturization, so that the same functionality is sought with ever smaller components.
  • the electronic key can be equipped with means for inductive energy transmission from the motor vehicle to the key, so that the electronic key can be operated with this energy.
  • a device for signal transmission in which a plurality of coils, each having a coil former, are arranged as inductive components on a circuit board.
  • the longitudinal axes of the coils are arranged in different spatial directions, such that the coils have a reception and / or transmission characteristic in the manner of an antenna in these spatial directions.
  • a disadvantage of the known device for signal transmission is its space requirement and the high component and assembly costs. This device for signal transmission therefore appears to be unsuitable for use in an electronic key for a motor vehicle.
  • a miniaturized inductive electrical component in the manner of an antenna for a device for signal transmission is known from US 2003/0210198 AI.
  • the inductive electrical component has a coil body on which three coils are arranged as coil windings.
  • the longitudinal axes of the coils are arranged essentially orthogonally to one another on the coil body, such that the coils have a reception and / or transmission characteristic in all three spatial directions. This enables a field measurement for the electromagnetic field for waking and / or locating the electronic key in KeylessEntry / Go systems with a single inductive electrical component. Nevertheless, an electronic key that uses such an inductive electrical component is still bulky due to the means for inductive energy transmission.
  • the invention has for its object to provide an inductive electrical component with a further reduced space requirement with the same functionality, in particular with regard to the inside / outside detection and the energy transfer.
  • a further fourth coil is arranged on the single coil body in addition to the three coils arranged orthogonally to one another for the inside / outside detection.
  • This fourth coil is used for energy transmission by means of an electromagnetic field, in particular for the operation of the device for signal transmission.
  • all the coils are integrated into a single inductive electrical component in the manner of a multidimensional coil, so that instead of several separate coils on the circuit board, only a single component with a correspondingly reduced space requirement has to be accommodated.
  • Further embodiments of the invention are the subject of the dependent claims.
  • the coil former to consist of a ferrite core.
  • the four coil windings are then applied to a common ferrite core.
  • the coils can be designed differently, for example in the type of winding, in the winding direction, in the wire thickness, in the type of wire or the like, so as to be optimally adapted to the respective intended use.
  • the energy transmitted by means of the fourth coil is used to operate the key.
  • the fourth coil can thus be designed for higher power.
  • the fourth coil for energy transmission can be aligned in one of the directions of the three other coils for the location or in a different direction. For the sake of a compact arrangement, it makes sense that the fourth coil is arranged on the coil body essentially in parallel and optionally spaced apart from one of the three coils.
  • the inductive electrical component can be inserted into a recess in the printed circuit board. This advantageously involves optimal assembly and space utilization, the maximum overall height for the component being able to be dimensioned larger by the thickness of the printed circuit board.
  • the electrical connections are not at the bottom of the component but are preferably attached to it laterally.
  • the electrical connections for the individual coils on the coil body can be independent of one another in a differential manner or also have one or more common ground connections in a single-ended manner.
  • a winding protection can be provided on the component for protection against mechanical or thermal loads.
  • This winding protection can be produced, for example, by potting, extrusion coating or the like using plastic.
  • the inductive electrical component according to the invention is primarily for use in a locking system, in particular for the operator-independent access and / or Driving authorization for a motor vehicle in the manner of a keyless entry / go functionality and / or suitable for operator-dependent access and / or driving authorization for a motor vehicle in the manner of remote / local control.
  • a locking system comprises at least two states, formed as a control device, such as a control device for unlocking and / or locking the car doors, the ignition lock, the steering wheel lock, for releasing and / or locking the immobilizer, the engine control unit or the like. , and an associated second device designed in the manner of an electronic key, an ID transmitter, a chip card or the like.
  • the two devices have means for sending and / or receiving signals.
  • At least one of the signals transmitted between the second device and the first device is, in particular, a coded operating signal for authenticating the second device, so that after a positive evaluation of the transmitted operating signal, the state of the first device can be changed when the second device is authorized.
  • there is an inductive electrical component which is used to wake and / or locate this device and is designed in accordance with the invention.
  • Such a second device can be carried and operated particularly conveniently by the user due to its small size.
  • the inductive electrical component has an expanded functionality in that it replaces several previously discrete components. Nevertheless, the inductive electrical component has a reduced space requirement. The component costs and the assembly and assembly costs incurred during further processing are also reduced. KeylessEntry / Go systems in motor vehicles using such an inductive electrical component are consequently less expensive and also more reliable than conventional systems.
  • Show it 1 is a motor vehicle equipped with a locking system
  • FIG. 4 shows a schematic block diagram of the first and second device with a diagram for the transmission of the signals
  • Fig. 6 is a schematic diagram for the electrical connection of the inductive electrical component according to a first embodiment
  • Fig. 7 is a schematic circuit diagram for the electrical connection of the inductive electrical component according to a second embodiment.
  • a motor vehicle 1 with the authorized user 2 can be seen in FIG. 1.
  • the motor vehicle 1 is provided with a locking system 3 as a door locking system, which comprises a first device 4 designed as a control device and an associated second device 5.
  • the second device 5 is designed in the manner of an electronic key, an identification (ID) transmitter, a chip card, a smart card or the like.
  • the second device 5 is in the possession of the authorized user 2, so that the latter has access to the motor vehicle 1 within an effective range 8 regardless of the operator.
  • the first device 4 has at least two states, with the car doors 6 being locked in the first state and unlocked in the second state.
  • the two devices 4, 5 have means for transmitting and / or receiving signals 7.
  • a coded, electromagnetic operating signal 23 (see FIG. 4).
  • the coded operating signal 23 serves for the authentication of the second device 5, whereby a change in the state of the first device 4 can be effected in the case of an authorized second device 5 after a positive evaluation of the transmitted operating signal 23.
  • the coded operating signal 23 is transmitted when the authorized user 2 actuates the door handle 16 on the car door 6 or approaches the door handle 16. This unlocks the car doors 6 according to the KeylessEntry functionality.
  • the transmission of the coded operating signal 23 can equally well take place automatically without the participation of the user 2 as soon as the user enters the effective range 8, which is not considered in more detail below. If the user closes the car doors 6 from the outside, the car doors 6 are automatically locked. The car doors 6 can also be automatically locked after the user has left the effective area 8.
  • the locking system 3 also determines the driving authorization for the motor vehicle 1 regardless of the operator.
  • the first device 4 designed as a control device likewise effects the unlocking and / or locking of the ignition lock 9 or the steering wheel lock 10, which can be seen in FIG. 3, in accordance with the two states.
  • Another functionally relevant component of motor vehicle 1 can equally well be controlled accordingly by first device 4.
  • an immobilizer, the engine control unit or the like can thereby be released and / or blocked.
  • the coded operating signal 23 for the authentication of the second device 5 is transmitted when the authorized user 2 is in the motor vehicle 1 and actuates a start / stop switch 11. As a result, the starting process or the like of the motor vehicle 1 is triggered in accordance with the KeylessGo functionality.
  • the locking system 3 for access authorization can also be controlled as a function of a remote control, depending on the operator.
  • the car doors 6 of the motor vehicle 1 can be operated remotely up to a certain maximum distance from the Lock and / or unlock motor vehicle 1, ie the central locking for the car doors 6 can be operated by the user 2.
  • a coded remote control signal 12 can be transmitted between the second device 5 and the first device 4.
  • remote control signals 12 electromagnetic signals, such as RF signals and / or infrared signals or the like, are generally used.
  • the transmission of the ferri operating signal 12 can be triggered by the user 2 by means of actuating members 14 located on the housing of the second device 5 and designed as buttons.
  • actuating members 14 located on the housing of the second device 5 and designed as buttons.
  • a control signal is in turn transmitted via a bus system 15 to the control unit 13 located in the respective car door 6 for locking and / or unlocking the car doors 6.
  • the second device 5 shown in FIG. 2 there are a total of three buttons 14, one button 14 each for unlocking and locking the car doors 6 —and another button 14 for opening the trunk lid.
  • the essentially operator-dependent driving authorization is shown in the manner of a local control.
  • the second device 5 is inserted into a receptacle 17 on an ignition lock 9 located in the dashboard of the motor vehicle 1.
  • contactless inductive energy transmission from the ignition lock 9 to the second device 5 can be switched on, so that the energy required for the intended operation of the second device 5 is supplied by the ignition lock 9.
  • the operator-dependent driving authorization can thus also be used in particular in an emergency, for example when the battery of the second device 5 is exhausted and an operator-independent mode of operation is then no longer possible.
  • the first device 4 then exchanges the coded operating signal 7 with the second device 5 located in the receptacle 17 via the bus system 15, which may be infrared signals, for example.
  • the immobilizer release is again activated.
  • the motor vehicle 1 can be started up, for example by actuating the start / stop switch 11, by actuating the ignition lock 9 or the like by the user 2.
  • the first device 4 sends an electromagnetic signal 20, referred to as a wake-up signal, for the associated second device 5 by means of a transmitter / receiver 18 as a means for transmitting and / or receiving signals.
  • This wakes up the second device 5 by bringing it out of an idle state reduced energy requirement is brought into an activated state for the intended operation.
  • the first device 4 sends at least one further, locating electromagnetic signal 21, which is also referred to below as an area delimitation signal.
  • the associated second device 5 can determine its location in relation to the first device 4. In particular, it can be determined whether the second device 5 is located outside of the motor vehicle 1 and, if appropriate, at which point in the exterior 25 and / or in the interior 24 of the motor vehicle 1 (see also FIG. 3).
  • the area delimitation signal 21 preferably consists of several sub-signals. There are three sub-signals 21a, 21b, 21c, which are each assigned to a motor vehicle side and the motor vehicle rear.
  • the partial signal 21a transmitted by the transmitter / receiver 18a is assigned to the left side of the motor vehicle
  • the partial signal 21c transmitted by the transmitter / receiver 18c is assigned to the rear of the motor vehicle, reference also being made to FIG. 3
  • the sub-signals 21a, 21b, 21c are sent in succession.
  • the location is then determined in accordance with the field strength of the respective sub-signal 21a, 21b, 21c received by the second device 5, specifically on the basis of the respective field strengths of the sub-signal 21a, 21b, 21c received in the three spatial directions x, y and z with the aid of an in Microprocessor 34 located in the second device. It is particularly preferred that the wake-up signal 20 and / or the area delimitation signal 21 or the partial signals 21a, 21b, 21c have a frequency lying in the inductive LF range.
  • the second device 5 then sends a further signal 22 containing the information about the determined location to the first device 4 by means of a transmitter / receiver 19, which signal is also referred to below as a response signal.
  • the coded electromagnetic operating signal 23 for example as an RF signal, is then transmitted between the first and the second device 4, 5 for authentication by means of the transceivers 18, 19.
  • the signal 23 can in particular consist of several partial signals and can be transmitted in a bidirectional communication between the two devices 4, 5. With regard to more details on bidirectional communication itself, reference is also made to DE 43 40 260 AI.
  • the second device 5 For signal transmission of the inductive signals 20, 21 or 21a, 21b, 21c, the second device 5 has an inductive electrical component 26 which acts like an antenna.
  • This component 26 has at least two coils 27, 28 which have a coil former.
  • the longitudinal axes of the coils 27, 28 are arranged in mutually different spatial directions, such that the coils 27, 28 have a reception and / or transmission characteristic in these spatial directions, which in turn means the measurement of the components of the field strength of the transmitted signal 20 pointing in these spatial directions.
  • the coils 27, 28 are arranged as coil windings on a single coil body 30.
  • the coil former 30 expediently consists of a ferrite core in order to ensure a sufficient signal strength.
  • the arrangement of only two coils 27, 28 on the coil body 30 is sufficient in some cases, but the spatial vectorial field strengths of the partial signals 21a, 21b, 21c can preferably be determined in the second device 5, for which purpose three coil windings 27, 28, on the coil body 30 29 are arranged essentially orthogonally to one another by means of their longitudinal axes.
  • the coil 27 is oriented in the x direction, the coil 28 in the y direction and the coil 29 in the z direction. This makes the Reception and / or transmission characteristics of the component 26 for field measurement for waking and / or locating the second device 5 in all three spatial directions.
  • a further, fourth coil 31 for energy transfer is arranged on the coil body 30.
  • the coils 27, 28, 29, 31 can be configured differently. For example, there may be differences in the type of winding, in the winding direction, in the wire thickness, in the type of wire or the like. This applies in particular to the fourth, which is used for energy transmission.
  • the fourth coil (31) is arranged essentially parallel and at a distance from one of the three coils (27, 28, 29) on the coil body (30), specifically in the present case to the coil 28.
  • the second device 5 there is a printed circuit board 33 on which the electrical electronic components, such as the component 26, the transmitter / receiver 19, the microprocessor 34 or the like, are arranged.
  • the component 26 can be inserted into a recess 32 in the circuit board 33 for optimal assembly and use of space.
  • the electrical connections (not shown further) for the component 26 are then preferably attached to the side of the coil body 30.
  • the coils 27, 28, 29, 31 on the coil body 30 can have independent electrical connections in a differential manner, as shown schematically in FIG. 6, or one or more common ground connections in have single-ended type, as can be seen schematically in FIG. ' 7.
  • the component 26 can have winding protection as protection against mechanical or thermal loads, but this is also not shown further.
  • winding protection can be achieved, for example, by potting, extrusion coating or the like Apply plastic when the inductive electrical component 26 is mounted on the circuit board 33.
  • an inductive electrical component 26 As described above with reference to a motor vehicle locking system 3, in at least one of the two devices 4, 5, in particular in the second device 5, there is an inductive electrical component 26 according to the invention which is used to wake and / or locate this device 5.
  • the invention is not limited to the exemplary embodiment described and illustrated. Rather, it also includes all professional training within the scope of the claims.
  • the inductive electrical component 26 can also be used for another door lock, which is located, for example, on a property or the like. It is also possible to use the inductive electrical component 26 in mobile telephones, in other data transmission systems or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)

Abstract

L'invention concerne un composant électrique inductif (26), en particulier du type d'une antenne pour un dispositif de transfert de signaux du type d'une clé électronique, d'un transducteur ID, d'une carte à puce ou analogue, comprenant un corps de bobine (30) sur lequel sont disposées trois bobines (27, 28, 29) sous forme d'enroulements de bobines. Les axes longitudinaux des bobines (27, 28, 29) sont sensiblement orthogonaux au corps de bobine (30), de telle façon que les bobines (27, 28, 29) présentent une caractéristique de réception et/ou d'émission dans les trois directions de l'espace. Sur le corps de bobine individuel (30) est disposée une quatrième bobine (31) pour le transfert d'énergie, destinée notamment au fonctionnement du dispositif de transfert de signaux. En outre, l'invention concerne un système de fermeture utilisant un tel composant électrique inductif (26), en particulier pour l'autorisation d'accès et/ou de conduite indépendante du fonctionnement d'un véhicule automobile, du type commande à distance/à proximité.
EP05715905.5A 2004-03-11 2005-03-10 Composant inductif pour cle electronique Expired - Lifetime EP1723615B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004011889 2004-03-11
PCT/EP2005/002525 WO2005088560A1 (fr) 2004-03-11 2005-03-10 Composant inductif, en particulier pour cle electronique

Publications (2)

Publication Number Publication Date
EP1723615A1 true EP1723615A1 (fr) 2006-11-22
EP1723615B1 EP1723615B1 (fr) 2014-05-21

Family

ID=34895211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05715905.5A Expired - Lifetime EP1723615B1 (fr) 2004-03-11 2005-03-10 Composant inductif pour cle electronique

Country Status (3)

Country Link
EP (1) EP1723615B1 (fr)
DE (1) DE102005011042A1 (fr)
WO (1) WO2005088560A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2026406A1 (fr) * 2007-08-14 2009-02-18 Oticon A/S Unité d'antenne multifonction
US8907760B2 (en) * 2010-09-09 2014-12-09 Nxp B.V. Multiple-frequency solutions for remote access systems
JP5864295B2 (ja) * 2012-02-10 2016-02-17 東光株式会社 複合アンテナ
DE102013203947A1 (de) * 2013-03-07 2014-09-11 Bayerische Motoren Werke Aktiengesellschaft Identifikationsgeber für ein Zugangskontrollsystem eines Objekts
DE102014101086A1 (de) 2014-01-29 2015-07-30 Huf Hülsbeck & Fürst Gmbh & Co. Kg Mobilgerät für ein schlüsselloses Zugangs- oder Betätigungssystem für Kraftfahrzeuge
ES2683253T3 (es) 2016-03-04 2018-09-25 Premo, S.L. Inductor alargado flexible y antena de baja frecuencia alargada y flexible
DE102017200815A1 (de) 2017-01-19 2018-07-19 Robert Bosch Gmbh Messsystem und Verfahren zur Erfassung einer Position innerhalb des Körpers eines Individuums

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Publication number Priority date Publication date Assignee Title
US6563474B2 (en) * 2000-12-21 2003-05-13 Lear Corporation Remote access device having multiple inductive coil antenna
JP3882595B2 (ja) * 2001-11-28 2007-02-21 アイシン精機株式会社 アンテナ装置
JP3829761B2 (ja) * 2002-06-04 2006-10-04 株式会社デンソー 受信アンテナ、携帯器
JP3924512B2 (ja) * 2002-06-27 2007-06-06 株式会社東海理化電機製作所 チップ多軸アンテナ
US7123206B2 (en) * 2003-10-24 2006-10-17 Medtronic Minimed, Inc. System and method for multiple antennas having a single core

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005088560A1 *

Also Published As

Publication number Publication date
DE102005011042A1 (de) 2005-09-29
EP1723615B1 (fr) 2014-05-21
WO2005088560A1 (fr) 2005-09-22

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