EP0843871B1 - Dispositif pour la transmission sans contact de signaux entre une partie fixe et une partie rotative du vehicule - Google Patents

Dispositif pour la transmission sans contact de signaux entre une partie fixe et une partie rotative du vehicule Download PDF

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Publication number
EP0843871B1
EP0843871B1 EP96911921A EP96911921A EP0843871B1 EP 0843871 B1 EP0843871 B1 EP 0843871B1 EP 96911921 A EP96911921 A EP 96911921A EP 96911921 A EP96911921 A EP 96911921A EP 0843871 B1 EP0843871 B1 EP 0843871B1
Authority
EP
European Patent Office
Prior art keywords
profile
pot
arrangement
cores
shell
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.)
Expired - Lifetime
Application number
EP96911921A
Other languages
German (de)
English (en)
Other versions
EP0843871A1 (fr
Inventor
Klaus Dobler
Erich Zabler
Anton Dukart
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0843871A1 publication Critical patent/EP0843871A1/fr
Application granted granted Critical
Publication of EP0843871B1 publication Critical patent/EP0843871B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/18—Rotary transformers
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/04—Arrangements for transmitting signals characterised by the use of a wireless electrical link using magnetically coupled devices

Definitions

  • the present invention relates to an arrangement for contactless Transfer signals between a fixed one and on the other hand a rotatably mounted vehicle part - preferably between one equipped with an airbag Steering wheel and a control circuit arranged on the chassis - which arrangement consists of a transferor whose primary and secondary winding in separate to the axis of rotation of the movable Vehicle parts rotatable shell cores lie, the shell cores have an L-profile, the interlock so that the front of the short Leg of an L-profile on the inside of the long leg facing the other L-profile and thereby air gaps arise, the magnetic flux radial to the axis of rotation cuts.
  • This known rotary transformer serves both ignition pulses from a control unit attached to the chassis to an in Steering wheel arranged airbag as well as in the opposite direction Diagnostic signals of the airbag squib resistance to the control unit transferred to. A diagnostic signal transmitted to the control unit of the squib resistance could therefore be caused by a Air gap change incorrect information about the Deliver the functionality of the airbag.
  • the invention is therefore based on the object of an arrangement of the type mentioned, in which an axial Offset between a fixed and a movable Vehicle part a contactless between the two parts transmitted signal influenced as little as possible.
  • the shell cores of the rotary transformer an L-profile, these interlock so that each the front of the short leg of an L-profile on the inside facing the long leg of the other L-profile is.
  • the long sides are the inside Leg of the L-profile and / or the front of the short Legs bevelled so that one another axial offset of the two shell cores Air gaps between the long and short legs reduced. If the two shell cores are axially offset, reduce their air gaps and thus compensate for one longer path of magnetic flux over the shell cores. Axial displacement and installation tolerances, for example one Steering wheel on which one of the two shell cores is mounted is, therefore, have little influence on the transmitted Signals. To reduce the weight of the transmitter it is appropriate that one of the two shell cores from a or several segments of a ring.
  • Figures 1 and 2 show two variants with U-shaped Shell cores of a transformer according to the prior art
  • Figure 3 shows a transformer with L-shaped shell cores
  • Figure 4 shows a section of a transformer, at a shell core is formed as a ring segment.
  • Figure 1 is a cross section through an annular Transformer shown with two coaxially to each other arranged shell cores 1 and 2, of which one shell core 1 is primary winding 3 and the other shell core 2 carries the secondary winding 4.
  • the shell core 2 for the secondary winding 4 is for example on a steering column 5 with an airbag equipped steering wheel attached. This shell core 2 thus forms the rotor of the rotary transformer.
  • the stator is the shell core 1 for the primary winding 3; he's with that Vehicle chassis firmly connected.
  • the connections of the Secondary winding 4 lead to a not shown Ignition device of the airbag in the steering wheel, and the Primary winding 3 is also not shown Control unit connected.
  • the U-profiles of both shell cores 1 and 2 are with their Openings and the windings 3 and 4 therein facing each other.
  • the end faces 6 and 7 of both U-profiles 1 and 2 together form an air gap 8, which is parallel is aligned with the axis of rotation 9 and from the magnetic flux is cut in the radial direction to the axis of rotation 9.
  • the end face 6 of the Shell core 2 in the direction of the axis of rotation 9 with respect to the End face 7 of the shell core 1 widened.
  • An axial Shift between the two shell cores 1 and 2 leaves the The size of the air gap is therefore unaffected. Because despite axial Shift between the two shell cores 1 and 2 of the Air gap 8 remains constant, the transferred remain Signals almost unaffected by axial shifts.
  • the end face 7 'of the primary Shell core 1 opposite the end face 6 'of secondary shell core 2 be widened.
  • the shell core is that of both has the lower mass, arranged on the steering column.
  • FIG 3 shows an annular transformer in which the Shell core 10 for the primary winding 11 and the shell core 12 designed for the secondary winding 13 as an L-profile are.
  • the L-profile 12 is on with its long leg for example, a steering column 14 attached.
  • This Shell core 12 represents the rotor of the transformer Shell core 10 for the primary winding 11, the stator of the Transmitter is connected to the vehicle chassis arranged relative to the shell core 12 so that the End face 15 of the short leg of the secondary side L-profile 12 of the inside 16 of the long leg of the primary-side L-profile 10 is facing and that the End face 17 of the short leg of the primary side L-profile 10 of the inside 18 of the long leg of the is facing the secondary L-profile.
  • bevels 22 and 23 on the long Legs of the L-profiles 10 and 12 can also be the narrower End faces 15 and 17 of the short legs of the L-profiles 10 and 12 with corresponding bevels (in FIG. 3 not shown).
  • the L-profiles of the shell cores bring against the U profiles of the first embodiment a considerable Weight reduction.
  • the weight of the transmitter can be reduce even further by using an L-profile 12 '- preferably the rotatable shell core 12'- only from or several segments of a ring.
  • the one about this winding 13 'belonging to segmented shell core is on the short leg of each L-profile segment.
  • a rotary transformer as described above, can generally be used where signals from a fixed vehicle part on a rotatable Vehicle part must be transferred.
  • signals from a fixed vehicle part on a rotatable Vehicle part must be transferred.
  • the application for one arranged in the steering wheel Called airbag. For example also with door locks a rotatably mounted locking cylinder Signal transmission may be required.
  • the rotary transformer come Door hinges or wheels (tire pressure / temperature Surveillance) in question.
  • a rotatably mounted vehicle part are transmitted, for example airbag ignition and Diagnostic signals or control signals for horn, radio, telephone or energy signals for a steering wheel heater, so can several of the transmitters described above axially be arranged one behind the other or coaxially one inside the other.
  • the shell cores of the transmitter are used to avoid Eddy currents advantageously from a soft magnetic Molding compound made of plastic-coated, electrically insulated finest Fe grains or others ferromagnetic metal granules (e.g. NiFe alloys) consists. For undercuts when pressing the shell cores to avoid this can also consist of several parts getting produced.
  • a soft magnetic Molding compound made of plastic-coated, electrically insulated finest Fe grains or others ferromagnetic metal granules (e.g. NiFe alloys) consists.
  • ferromagnetic metal granules e.g. NiFe alloys

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Air Bags (AREA)
  • Steering Controls (AREA)

Claims (2)

  1. Dispositif pour la transmission sans contact de signaux entre une partie fixe d'un véhicule et une partie montée de façon à pouvoir tourner par rapport à celle-ci, de préférence entre un volant de direction équipé d'un coussin d'air et un circuit de commande disposé sur le châssis, dispositif qui consiste en un répétiteur, dont l'enroulement primaire (11) et l'enroulement secondaire (13) se trouvent dans des noyaux de coquilles (10, 12) séparés, que l'on peut faire tourner l'un par rapport à l'autre autour de l'axe de rotation (21) de la partie mobile du véhicule (14), les noyaux de coquilles (10, 12) ayant un profil en forme de L, et venant en prise l'un dans l'autre d'une manière telle que respectivement la face frontale (15, 17) de l'aile courte d'un profilé en forme de L (12, 10) soit tourné vers la face intérieure (16, 18) de l'aile longue de l'autre profilé en forme de L (10, 12) et qu'il se forme ce faisant des entrefers (19, 20), qui coupe le flux magnétique radialement par rapport à l'axe de rotation (21),
    caractérisé en ce que
    les faces intérieures des ailes longues des profilés en forme de L (10, 12) et/ou les faces frontales des ailes courtes sont chanfreinées (22, 23) les unes par rapport aux autres de telle sorte que les entrefers (19, 20) situés entre les ailes longues et les ailes courtes se réduisent lors d'un décalage axial mutuel des deux noyaux de coquilles (10, 12).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    l'un des deux noyaux de coquilles (10) a la forme d'un anneau fermé et
    l'autre noyau de coquille (12') consiste en un ou plusieurs segments d'un anneau.
EP96911921A 1995-08-11 1996-04-25 Dispositif pour la transmission sans contact de signaux entre une partie fixe et une partie rotative du vehicule Expired - Lifetime EP0843871B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19529528 1995-08-11
DE19529528A DE19529528A1 (de) 1995-08-11 1995-08-11 Anordnung zum kontaktlosen Übertragen von Signalen zwischen einem feststehenden und einem drehbar gelagerten Fahrzeugteil
PCT/DE1996/000723 WO1997007487A1 (fr) 1995-08-11 1996-04-25 Dispositif pour la transmission sans contact de signaux entre une partie fixe et une partie rotative du vehicule

Publications (2)

Publication Number Publication Date
EP0843871A1 EP0843871A1 (fr) 1998-05-27
EP0843871B1 true EP0843871B1 (fr) 1999-07-21

Family

ID=7769235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96911921A Expired - Lifetime EP0843871B1 (fr) 1995-08-11 1996-04-25 Dispositif pour la transmission sans contact de signaux entre une partie fixe et une partie rotative du vehicule

Country Status (7)

Country Link
US (1) US5945744A (fr)
EP (1) EP0843871B1 (fr)
JP (1) JPH11510927A (fr)
KR (1) KR100416464B1 (fr)
AU (1) AU698007B2 (fr)
DE (2) DE19529528A1 (fr)
WO (1) WO1997007487A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19530589A1 (de) * 1995-08-19 1997-02-20 Bosch Gmbh Robert Anordnung zum kontaktlosen Übertragen eines Airbag-Auslösesignals
EP0926690A4 (fr) * 1997-07-03 2000-12-20 Furukawa Electric Co Ltd Transformateur dissocie et controleur d'emission equipe de ce transformateur dissocie
US6512437B2 (en) * 1997-07-03 2003-01-28 The Furukawa Electric Co., Ltd. Isolation transformer
US6032546A (en) * 1997-07-21 2000-03-07 Stone; Neil System for transferring electrical power between non-contacting elements in relative motion
US6121692A (en) * 1999-09-14 2000-09-19 Eaton Corporation Circuit and method for establishing two-way communication between the steering column and the steering wheel of a vehicle
DE10121533C2 (de) * 2001-05-03 2003-07-24 Thyssen Krupp Automotive Ag Sicherheitseinrichtung für Fahrzeuge
DE10357496A1 (de) 2002-12-09 2004-07-01 Carl Zeiss Operationsmikroskopiesystem
US7405540B2 (en) * 2003-10-20 2008-07-29 Teleflex Megatech, Inc. Secondary power supply system and method of activating subsystems from a vehicle steering wheel
US7525449B1 (en) 2003-10-20 2009-04-28 Teleflex Megatech, Inc. Status light for switch on boat steering wheel
JP3915806B2 (ja) * 2003-11-11 2007-05-16 セイコーエプソン株式会社 電気光学装置および電子機器
US7672759B1 (en) 2004-02-24 2010-03-02 Teleflex Megatech, Inc. Communication with a steering wheel switch
US7135981B1 (en) 2004-10-12 2006-11-14 Teleflex Megatech Inc. Fuel level variation detector for marine vehicle
EP2674950A1 (fr) 2012-06-11 2013-12-18 Tyco Electronics Nederland B.V. Connecteur sans contact, système de connecteur sans contact et procédé de fabrication du connecteur sans contact
US9285283B2 (en) 2014-05-19 2016-03-15 Honeywell International Inc. Adaptive wireless torque measurement system and method
DE102016203350B4 (de) * 2016-03-01 2023-08-10 Volkswagen Aktiengesellschaft Spule
WO2017204663A1 (fr) 2016-05-25 2017-11-30 Powerbyproxi Limited Agencement de bobine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1920890A1 (de) * 1969-04-24 1970-11-12 Guenther Vogeler Schleifringloser induktiver UEbertrager
DE3034735C2 (de) * 1980-09-15 1984-04-12 Transformatoren Union Ag, 7000 Stuttgart Vorrichtung zum Umspinnen von elektrischen Leitern
JPS5919441A (ja) * 1982-07-26 1984-01-31 Hitachi Ltd 回転体−固定体間伝送装置
JPS59216338A (ja) * 1983-05-25 1984-12-06 Hitachi Ltd 回転部の信号伝達装置
FR2572845B1 (fr) * 1984-11-06 1987-03-20 Peugeot Aciers Et Outillage Dispositif de transmission, par couplage magnetique, d'informations issues d'organes de commande montes sur un volant de direction a un organe solidaire d'un vehicule
DE3915188C1 (en) * 1989-05-10 1990-11-22 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Wireless interrogation and current supply method for switches - using capacitative and inductive elements corresp. to sec. winding of transformer
EP0419716A1 (fr) * 1989-09-29 1991-04-03 Paul Forkardt GmbH & Co. KG Procédé pour transmettre sans contact des mesures physiques mesurées dans un corps rotatif
DE4120650A1 (de) * 1991-06-22 1992-12-24 Kolbenschmidt Ag Vorrichtung zur uebertragung von elektrischer energie und daten in kraftfahrzeugen
US5637973A (en) * 1992-06-18 1997-06-10 Kabushiki Kaisha Yaskawa Denki Noncontacting electric power transfer apparatus, noncontacting signal transfer apparatus, split-type mechanical apparatus employing these transfer apparatus and a control method for controlling same
DE59304677D1 (de) * 1993-03-24 1997-01-16 Siemens Ag Vorrichtung und Verfahren zur drahtlosen Daten- und Energieübertragung
US5636863A (en) * 1994-04-26 1997-06-10 Eaton Corporation Vehicle steering column control system

Also Published As

Publication number Publication date
KR19990036308A (ko) 1999-05-25
KR100416464B1 (ko) 2004-03-26
AU5495696A (en) 1997-03-12
JPH11510927A (ja) 1999-09-21
DE59602491D1 (de) 1999-08-26
AU698007B2 (en) 1998-10-22
US5945744A (en) 1999-08-31
WO1997007487A1 (fr) 1997-02-27
DE19529528A1 (de) 1997-02-13
EP0843871A1 (fr) 1998-05-27

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