EP1597713A1 - Dispositif pour la transmission sans fil de signaux et/ou d'energie - Google Patents

Dispositif pour la transmission sans fil de signaux et/ou d'energie

Info

Publication number
EP1597713A1
EP1597713A1 EP03769248A EP03769248A EP1597713A1 EP 1597713 A1 EP1597713 A1 EP 1597713A1 EP 03769248 A EP03769248 A EP 03769248A EP 03769248 A EP03769248 A EP 03769248A EP 1597713 A1 EP1597713 A1 EP 1597713A1
Authority
EP
European Patent Office
Prior art keywords
energy
signals
transmitter
primary side
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.)
Withdrawn
Application number
EP03769248A
Other languages
German (de)
English (en)
Inventor
Bernhard Mattes
Harald Kazmierczak
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 EP1597713A1 publication Critical patent/EP1597713A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/017—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including arrangements for providing electric power to safety arrangements or their actuating means, e.g. to pyrotechnic fuses or electro-mechanic valves
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/0104—Communication circuits for data transmission
    • B60R2021/01047—Architecture
    • B60R2021/01054—Bus
    • B60R2021/01075—Bus between the airbag control unit and pyrotechnic fuses or equivalent actuators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/0104—Communication circuits for data transmission
    • B60R2021/01081—Transmission medium
    • B60R2021/01088—Transmission medium wireless
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/0104—Communication circuits for data transmission
    • B60R2021/01102—Transmission method
    • B60R2021/01109—Transmission method power and data signal using transmission medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/017—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including arrangements for providing electric power to safety arrangements or their actuating means, e.g. to pyrotechnic fuses or electro-mechanic valves
    • B60R21/0173—Diagnostic or recording means therefor

Definitions

  • the invention relates to a device for wireless transmission of signals and / or energy from the primary side of a transmitter to the secondary side of the transmitter, the signals or the energy being fed into the transmitter via at least two lines on the primary side and diagnostic means for checking the functionality of modules arranged on the secondary side are provided.
  • German laid-open specification 100 46 695 describes a device for wireless transmission of a trigger signal for a restraint system in a motor vehicle.
  • This device comprises an inductive transmitter.
  • a processor serving as an evaluation unit which is connected to a vehicle bus, belongs to the primary side of the transmitter.
  • the vehicle bus is also connected to a data input / output of a control unit for the restraint system.
  • This airbag control unit is also connected directly to the processor via an ignition line.
  • the airbag control unit transmits a triggering command for the restraint system to the processor via the ignition line. This interprets the trigger command into a trigger signal, which is then fed into the transmitter on the primary side and is thus transmitted to the restraint system arranged on the secondary side.
  • the processor is connected to the primary winding of the transformer via two lines.
  • the functionality of the entire module can be checked and in particular also whether the signal feed on the primary side of the transmitter is disturbed. It is also known from practice to transmit energy with the aid of an inductive transformer in addition to signals. The energy is also fed into the transformer via two lines.
  • such devices are used, for example, in motor vehicles in the context of restraint systems in order to transmit signals and energy between the steering column and steering wheel or chassis and vehicle seat.
  • German patent application 102 317 13 also describes a device of the type mentioned at the outset, which is specifically designed for the transmission of signals and energy between the chassis and the vehicle seat.
  • the transmission is also inductive here.
  • the primary side of the transmitter is realized in the form of a conductor loop for signal transmission and a conductor loop for energy transmission and is arranged in the slide rail for the vehicle seat.
  • the two primary coils each have only one winding.
  • the secondary coils of the transformer are arranged on the seat side.
  • the present invention proposes a possibility of ensuring the functionality of the modules arranged on the secondary side, even if the signal or energy feed is disturbed on the primary side.
  • a device of the type mentioned at the outset is equipped with at least one further line for feeding signals or energy.
  • switching means are provided, via which all lines for signal or energy supply can optionally be connected to the transformer. These switching means can be controlled by the diagnostic means, so that a switchover to at least two undisturbed lines takes place when the diagnostic means have recognized a line connection as faulty.
  • the diagnostic means or the diagnostic function of a control device arranged on the primary side is not only used for recognizing and signaling a functional impairment, but also for automatically restoring the functional capability until the cause of the error has been remedied if the functional impairment relates to a faulty line connection between the signal or energy source and the transmitter is due.
  • the switching means are implemented in the form of a matrix circuit which, when appropriately activated, switches from a faulty line to the redundant line.
  • the individual switching elements of such a matrix circuit can be formed, for example, by power MOS FET switches.
  • a transmitter is used in the context of the device according to the invention, which enables wireless transmission of signals or energy.
  • the type of transmitter ie the physical principle on which the transmitter operates, is primarily determined by the type of application. Capacitive or inductive transformers are particularly suitable for the automotive sector.
  • the device according to the invention comprises an inductive transformer with at least two conductor loops or coil windings for feeding signals or energy.
  • the conductor loops or coil windings can then be used alternatively or connected in series for signal feeding or energy feeding with the aid of the controllable switching means.
  • the inductive transformer comprises at least one conductor loop or coil winding for the signal feed and at least one conductor loop or coil winding for the energy feed
  • at least one third conductor loop or coil winding is provided, which, depending on the switching means that can be controlled, is provided Can be used for signal feed or energy feed.
  • 1 shows the block diagram of a device for the wireless transmission of signals and energy for a restraint system in a motor vehicle
  • 2 shows an implementation according to the invention of the primary side of the transmitter and of the interfaces for signal and energy feed in a device as shown in FIG. 1,
  • FIG. 3 shows the current profile in the event of an interruption in the line connection between the primary side of the transformer and the electronics arranged on the primary side for the exemplary embodiment shown in FIG. 2 and
  • FIG. 4 shows a further exemplary embodiment for a device according to the invention, which can be used in particular for the wireless transmission of signals and energy between the chassis of a motor vehicle and a vehicle seat.
  • the device shown in FIG. 1 comprises an inductive transmitter 1 - shown only schematically here - with which signals and energy are transmitted from the electronics arranged on the primary side 13 to the restraint system 5 arranged on the secondary side 7.
  • the electronics on the primary side comprise an evaluation unit 8 which is connected to a vehicle bus 10.
  • the airbag control unit 9 is also connected to the vehicle bus 10.
  • a release unit 11 is arranged on the primary side 13 and is connected to the airbag control unit 9 via an ignition line 28.
  • the ignition line 28 is also connected to a data input of the evaluation unit 8.
  • the output signals of the evaluation unit 8 are amplified by a driver 26 and fed into the transmitter 1 on the primary side.
  • the primary side 13 also includes a driver 12, which is provided for the energy transfer from the primary side 13 to the secondary side 7 of the transformer 1 and via which the output signals of the release unit 11 are also fed into the transformer 1.
  • a driver 27 is arranged on the secondary side 7, quasi mirror image of the primary side 13, via which the output signals of the evaluation unit 8 are amplified and fed to an evaluation unit 2 arranged on the secondary side. Conversely, signals can also be transmitted from the secondary evaluation unit 2 via the driver 27, the transmitter 1 and the driver 26 to the primary evaluation unit 8.
  • a signal output of the evaluation unit 2 is connected to a trigger circuit 4 for the restraining means 5.
  • a driver 6 is provided on the secondary side for the energy transfer from the primary side 13 to the secondary side 7 and also amplifies the transmitted output signals of the redundancy unit 11. These are then fed to a release unit 3.
  • the release unit 3 is connected both to the evaluation unit 2 and to the trigger circuit 4.
  • the airbag control unit 9 When an impact of the vehicle is sensed, the airbag control unit 9 generates a trigger command for the restraint system 5, which is then transmitted via the ignition line 28 to the evaluation unit 8 on the one hand and to the redundancy unit 11 on the other hand.
  • the evaluation unit 8 interprets the trigger command in a tripping signal, the "page via the driver 26 and the transmitter 1 to the secondary is transferred 7 and is fed there via the driver 27 to the evaluation unit. 2
  • the redundancy unit 11 forms at least one redundancy signal from the trigger command, which is transmitted via the driver 12 and the transmitter 1 to the secondary side 7 and is fed there to the release unit 3 via the driver 6.
  • a corresponding release signal is transmitted to the trigger circuit 4.
  • an activation signal is transmitted to the trigger circuit 4. However, this is only activated when it has received a corresponding release signal from the release unit 3.
  • FIGS. 2 and 3 show the interface on the primary side between the transmitter 1 and the components of the primary side 13, which are generally arranged in a housing.
  • the transmitter 1 comprises on the primary side two coil windings 31 and 32 for the information transmission, in particular the transmission of the trigger signals, and two coil windings 33 and 34 for the energy transfer and the transmission of redundancy signals.
  • the driver 26 can either be connected to the coil winding 31 - via lines 41 and 42 - or to the coil winding 32 - via lines 42 and 43 - or to the coil windings 31 and 32 connected in series - via lines 41 and 43.
  • the driver 12 can be connected with the aid of a matrix circuit 50 either to the coil winding 33 - via lines 51 and 52 - or to the coil winding 34 - via lines 52 and 53 - or to the coil windings 33 and 34 connected in series - via the lines 51 and 53.
  • the two matrix circuits 40 and 50 can be controlled via the airbag control unit 9, which is not shown here.
  • the airbag control unit 9 has a number of diagnostic functions with which the functionality of the restraint system 5 is checked regularly. Malfunctions of the line connections 41, 42, 43 and 51, 52, 53 are also recognized, such as a line break. This case is shown in Fig. 3. Lines 41 and 52 are interrupted here. On the one hand, the airbag control unit 9 ensures that this defect is visually signaled, for example, so that the driver can arrange for a repair. On the other hand, the airbag control unit 9 causes the matrix switches 40 and 50 to be switched over, so that the signal feed and the energy feed into the transformer take place via functioning line connections. In the exemplary embodiment shown here, the driver 26 is first connected via lines 41 and 42 to the first coil winding 31 for information transmission, which is shown in FIG. 2.
  • matrix circuit 40 is automatically switched over, so that driver 26 is now connected via lines 42 and 43 to second coil winding 32 for information transmission.
  • This situation is shown in Fig. 3.
  • the driver 12 is first connected via lines 52 and 53 to the second coil winding 34 for energy transmission (FIG. 2).
  • the matrix circuit 50 is automatically switched over, so that the driver 12 is now connected via lines 51 and 53 to the two coil windings 33 and 34 connected in series for energy transmission (FIG. 3). This ensures that the restraint system is triggered even if there is a line break.
  • FIG. 4 shows the block diagram of a device according to the invention for the wireless transmission of signals and energy from electronics 60 mounted on the vehicle frame to a restraint system 70 which is arranged in a vehicle seat.
  • the electronics 60 is designed in exactly the same way as the primary-side electronics of the exemplary embodiment explained above in connection with FIGS. 1 to 3 and also has the same functions.
  • the restraint system 70 is activated and triggered in the same manner as described above.
  • the trigger signals on the primary side are fed into an inductive transformer 100 via a driver 61, while energy and redundancy signals are fed via a driver 62.
  • the trigger signals are transmitted to the restraint system 70 on the secondary side via a driver 71, and the energy and the redundancy signals are transmitted via a driver 72.
  • the primary side of the transformer 100 is formed here by three conductor loops 101, 102 and 103.
  • the conductor loops 101, 102 and 103 can be optionally connected to the driver 61 or 62 via a matrix circuit 80 and can thus be used either for information transmission or for energy transfer.
  • the matrix circuit 80 is actuated by the airbag control unit when a line fault has been detected, and in this case switches over to the third intact conductor loop. If the cable is defective, the third conductor loop can be used to ensure that the system works properly until the fault has been rectified.

Abstract

L'invention concerne un dispositif pour la transmission sans fil de signaux et/ou d'énergie du côté primaire (13) d'un transformateur (1) au côté secondaire (7) de ce transformateur (1). Il est proposé, selon l'invention, de garantir l'aptitude au fonctionnement du module situé côté secondaire même si l'injection du signal ou de l'énergie est perturbée côté primaire. A cet effet, le dispositif dans lequel l'injection du signal ou de l'énergie côté primaire se fait par l'intermédiaire d'au moins deux lignes (41, 43; 51, 53) est pourvu d'au moins une autre ligne (42; 52) pour l'injection du signal ou de l'énergie. En outre, des moyens de commutation (40; 50) permettent la connexion sélective de toutes les lignes (41, 42, 43, 51, 52, 53) servant à l'injection du signal ou de l'énergie avec le transformateur (1). Ces moyens de commutation (40; 50) peuvent être déclenchés par des moyens diagnostiques (9) servant au contrôle de l'aptitude au fonctionnement des modules (5) placés côté secondaire. Lorsque ces moyens diagnostic déterminent qu'une connexion de ligne est perturbée, une commutation automatique sur au moins deux lignes non perturbées se fait automatiquement.
EP03769248A 2003-02-20 2003-10-16 Dispositif pour la transmission sans fil de signaux et/ou d'energie Withdrawn EP1597713A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10307177 2003-02-20
DE2003107177 DE10307177A1 (de) 2003-02-20 2003-02-20 Vorrichtung zur drahtlosen Übertragung von Signalen und/oder Energie
PCT/DE2003/003439 WO2004075136A1 (fr) 2003-02-20 2003-10-16 Dispositif pour la transmission sans fil de signaux et/ou d'energie

Publications (1)

Publication Number Publication Date
EP1597713A1 true EP1597713A1 (fr) 2005-11-23

Family

ID=32797572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03769248A Withdrawn EP1597713A1 (fr) 2003-02-20 2003-10-16 Dispositif pour la transmission sans fil de signaux et/ou d'energie

Country Status (3)

Country Link
EP (1) EP1597713A1 (fr)
DE (1) DE10307177A1 (fr)
WO (1) WO2004075136A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004051274A1 (de) * 2004-10-21 2006-04-27 Robert Bosch Gmbh Verfahren und Vorrichtung zum Anpassen einer Überwachungseinrichtung eines Steuergerätes für ein Rückhaltesystem eines Kraftfahrzeugs
EP1669249A1 (fr) * 2004-12-07 2006-06-14 IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A. Système de signalisation pour ceinture de sécurité pour un véhicule
FR2888538B1 (fr) * 2005-07-13 2007-08-24 Peugeot Citroen Automobiles Sa Dispositif de communication sans fil pour un arrangement modulable de sieges de vehicule.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958851A (en) * 1989-05-01 1990-09-25 Automotive Systems Laboratory, Inc. Air bag firing circuit
US5696409A (en) * 1996-09-04 1997-12-09 Trw Vehicle Safety Systems Inc. Apparatus for supplying power to the seat of a vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004075136A1 *

Also Published As

Publication number Publication date
WO2004075136A1 (fr) 2004-09-02
DE10307177A1 (de) 2004-09-02

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