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WO2002023815A1 - Procede destine a actionner et arreter un appareil relie a un bus dans un vehicule et dispositif destine a mettre en oeuvre ce procede - Google Patents

Procede destine a actionner et arreter un appareil relie a un bus dans un vehicule et dispositif destine a mettre en oeuvre ce procede Download PDF

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Publication number
WO2002023815A1
WO2002023815A1 PCT/DE2001/002480 DE0102480W WO0223815A1 WO 2002023815 A1 WO2002023815 A1 WO 2002023815A1 DE 0102480 W DE0102480 W DE 0102480W WO 0223815 A1 WO0223815 A1 WO 0223815A1
Authority
WO
WIPO (PCT)
Prior art keywords
bus
detection circuit
switched
signal
processor
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.)
Ceased
Application number
PCT/DE2001/002480
Other languages
German (de)
English (en)
Inventor
Nikolaus Schunk
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 WO2002023815A1 publication Critical patent/WO2002023815A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40039—Details regarding the setting of the power status of a node according to activity on the bus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40052—High-speed IEEE 1394 serial bus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • the invention is based on a method for input and
  • the method according to the invention for switching on and off a device connected to a bus in a motor vehicle with the features of the independent claim has the advantage over the fact that by means of a predetermined number of pulses one on the bus connected device is switched on so that no random impulses lead to a switch on and that the device is switched off by means of a clearly identifiable software command.
  • the software command is clearly interpreted by the processor of the device as a shutdown command.
  • a device is switched off by means of the software command if there is no data traffic to this device for a predetermined time.
  • This switch-off is preferably carried out by a bus manager or by another device authorized for this purpose.
  • the switch-off can also be carried out if there is no person in the motor vehicle. This is determined by means of a sensor system that detects, for example, the use of an electronic key that can be used to unlock the motor vehicle.
  • the device connected to the bus is switched on, if User input requires this or an authorized person enters the motor vehicle, using an electronic key.
  • a device connected to the bus has a processor which evaluates the software command for switching off, and detection circuits which recognize the switch-on sequence and thus switch the processor and the other components of the device on again.
  • the detection circuit has a photodiode, an integrator and a comparator, this circuit being necessary in order to react efficiently to a fluctuating light output.
  • This detection circuit is then referred to as an analog detection circuit. If there is an electrical line system for the bus, the detection circuit has a flip-flop and a downstream counter to identify the pulse sequence which has the number for the switch-on command. This detection circuit is then referred to as a digital detection circuit.
  • the detection circuits are connected to receive inputs of the bus. In an optical bus system, an electro-optical element with the analog detection circuit and then a bus driver with the digital detection circuit are used first. In this way, the detection circuits and the bus driver are modularly available. drawing
  • FIG. 1 shows a bus system with the detection circuits according to the invention in the devices
  • FIG. 2a shows the connection between two devices when using an electrical line system for the bus
  • FIG. 2b shows the connection between two devices when using an optical line system for the bus
  • FIG Bus driver with a digital detection circuit shows the electro-optical element with an analog detection circuit
  • FIG. 5a the structure of a digital detection circuit
  • FIG. 5b the structure of an analog detection circuit
  • FIG. 6 the method according to the invention as a flow chart.
  • the devices connected to the bus do not lead to battery depletion after a short time. Therefore, the devices connected to an IEEE1394B network should have an extremely low power consumption in the ⁇ A range when switched off.
  • devices connected to the bus are therefore switched off by means of a software command, a processor of each device evaluating this software command and switching itself and other components apart from a detection circuit which is used for switching on again.
  • the detection circuit is designed depending on the bus used. It is possible to get one electric bus or an optical bus.
  • a device is switched on by means of the respective detection circuit on the basis of a predetermined number of pulses which are transmitted via the bus and received by the detection circuit. In the optical case, these pulses are integrated, while in the electrical case, these pulses are counted.
  • an electro-optical element is connected upstream of the bus driver in order to use the bus driver equally for the electrical and the optical bus.
  • both the analog detection circuit and the digital detection circuit are used.
  • a restart of the devices connected to the bow is stimulated by a bus manager, so that the devices synchronize again and the existing devices are communicated to the bus manager.
  • FIG. 1 shows the configuration of a bus system with the detection circuits according to the invention in the devices as a block diagram.
  • a node 1 which is the bus manager here, forms the root of the bus.
  • the devices are each connected to the bus.
  • a logical bus system can also be used in an electrical line system for the bus.
  • the bus manager 1 has three bus drivers 2 with the detection circuits (watch dog) which lead to three branches of the bus system.
  • the bus drivers 2 enable data traffic via the bus.
  • the detection circuit is each connected to the data input of a device, while the data output of the device leads past the detection circuit.
  • the first data input / output of the bus manager 1 leads to a CD player 3 at its first data input / output with the bus driver 2.
  • the second data input / output of the CD player 3 leads to a data input / output. output of a car radio 4.
  • the second data input / output of the bus manager 1 leads to a first data input / output of a navigation device 5.
  • a second data input / output of the navigation device 5 leads to a
  • GSM Global System for Mobile Communication
  • the GSM box 6 is used for telephony and, if necessary, for data traffic to and from the motor vehicle.
  • a third data input / output of the bus manager 1 leads to a display 7.
  • Detection circuit in the bus driver 2 for the optical bus and for the electrical bus is possible in that the analog detection circuit is added in a first block of the bus driver 2 as a transmitting / receiving part via the optical line and the digital detection circuit is implemented downstream in a second block. In this way the standard component can be compared to the
  • Bus driver circuit are always carried out the same way and for an optical transmission the corresponding module, an electro-optical element, is connected upstream for the ' optical transmission.
  • the detection circuit for optical transmission is used directly to switch on the device.
  • the bus driver circuit and a connection to the processor are to be provided in the electro-optical element, Due to the optical losses due to optical coupling on the link and the transmission losses on the bus line itself, the reception level in front of the optical receiver can vary very greatly. The level fluctuations extend over the entire dynamic range of the receiver, so that an analog detection circuit (analog atch dog) is used here.
  • FIG. 2a shows the connection between two devices which are connected in a bus system according to FIG. 1.
  • the connection is electrical here.
  • a bus driver 41 of the left device therefore has a digital detection circuit 31 at its data input, as does the bus driver 41 of the right device.
  • the bus driver 41 again has the digital detection circuit 41 at its data input.
  • a first data input 43 which leads to an electro-optical element 42, is intended for the data to be transmitted by the device via the bus.
  • a second data output 44 of the bus driver 41 is used to transmit a switch-off command to the electro-optical element 42, so that all components in the electro-optical element 42 are also switched off except for an analog detection circuit 32.
  • the switch-off command is received by a device via the bus as a software command and evaluated by the receiving device.
  • the electro-optical element 42 is connected to a further electro-optical element 42 of a further device via a data input and a data output via optical waveguides.
  • the optical fibers can be made of plastic or glass.
  • the analog detection circuit 32 is located at the data input of the electro-optical element 42.
  • FIG 3 is a block diagram of the internal structure of a bus driver 41 of a device connected to the bus shown, which causes the data traffic via the bus and the switching on and off of the device.
  • a bus driver circuit 8 is connected via a data output 43 to a first data input of the electro-optical element 42, via a second data output the bus driver circuit 8 is connected to the upstream electro-optical element 42 via a further line 44, via a third data output the bus driver circuit 8 is connected to a functional network 10 connected.
  • the function network 10 executes predetermined logical links.
  • the bus circuit is connected to a digital circuit 31 via a second data input. Via its respective third data input and - output the bus driver circuit 8 is connected to a processor 60 '.
  • the bus driver circuit 8 is connected to the voltage supply co via a switch 15.
  • the switch 15 is controlled by the functional network 10.
  • a data output of the digital detection circuit 31 leads to a second data input of the functional network 10.
  • the digital detection circuit 31 receives the data received via the bus, which the digital detection circuit 31 forwards to the bus driver circuit 8 and then to the processor 60.
  • the digital detection circuit 31 is connected directly to the voltage supply V CC .
  • the data output of the function network 10 leads via an output 12 of the bus driver 41 to the further switches, which each interrupt the voltage supplies to the device.
  • the processor 60 of the device detects the software command to switch off, then the so-called sleep variable is transmitted via line 44 to the previously operated electro-optical element 42. This then also upstream this component, which is the analog Detection circuit 32 for the optical signals, communicated the shutdown command. With the exception of the analog detection circuit 32, all other components in the electro-optical component 42 are thus switched off. In the switched-off state, only the two detection circuits 31 and 32 of a device are then in operation, provided that both detection circuits are present. If there is a purely electrical transmission via the bus, the line 44 is omitted and there is only the output 43 and the input to the digital detection circuit 31 in order to send and receive the data via the bus in each case.
  • a sleep variable is set and transmitted by the bus driver circuit 8 to the function network 10, so that the function network 10 sets its output accordingly.
  • the output of the functional network 10 is connected on the one hand to the switch 15 and, on the other hand, is connected via an output 12 to the further voltage supplies of the downstream electronics. If the functional network 10 uses the sleep variables to recognize that the device is to be switched off, then it opens the switch 15 and likewise corresponding switches via the output 12 in order to interrupt the voltage supply to these components such as the bus driver circuit 8.
  • FIG. 4 shows the internal structure of the electro-optical element 42 as a block diagram.
  • a photodiode 22, which receives signals from the bus, is connected on the one hand to the analog detection circuit 32 and on the other hand to a preamplifier 20.
  • the preamplifier 20 is connected to the digital detection circuit 31 via its output.
  • the preamplifier 20 is also connected to the supply voltage V CQ via a switch 17.
  • the output of the optical detection circuit 32 is connected to a functional network 50, which corresponds to the functional network 10 in FIG. 3.
  • the functional network 50 is connected to the line 44 via a second input and receives the sleep variable via it.
  • the function network 50 is connected via its output to the switch 17 and opens it if the sleep variable on line 44 is set.
  • the functional network 50 closes the switch 17 when the analog detection circuit 32 gives the signal to be switched on again. If the switch 17 is closed, the switch 17 connects the supply voltage V w to the preamplifier 20.
  • the supply voltage Vcc is also connected via a switch 16 to an LED (light-emitting diode) driver 18.
  • An output of the LED driver 18 is connected to an LED 13, by means of which optical signals are applied to the bus.
  • An input of the LED driver 18 is connected to the line 43, so that the data to be transmitted go via the LED driver 18.
  • the switch 16 is also opened in order to interrupt the supply voltage V ⁇ to the LED (Light Emitting Diode) driver 18.
  • the LED driver 18 receives data signals from the bus driver 41 via the line 43. These then become the LED 13 transmitted to be transmitted as optical signals over the bus.
  • the supply voltage V cc is connected directly to the analog detection circuit 32, so that the analog detection circuit 32, like the digital detection circuit 31, is always connected to the supply voltage V cc .
  • the digital detection circuit 31 and in FIG. 5b, the analog detection circuit 32 are each shown as a block diagram.
  • the digital detection circuit 31 receives, via the inputs 30, the data signals which have been received via the bus.
  • the data lines are shown simply above, but they are actually double lines, for example plus and minus, in order to eliminate interference signals by a simple subtraction. This is the case, for example, for the so-called differential pseudo emitter coupled logic. Therefore, two lines lead to a flip-flop 24. These data signals go to inputs of the flip-flop 24.
  • the non-inverting output of the flip-flop 24 goes to a counter 25, which pays for the signal changes, ie either from high to low or from low to high. If a certain value, the overflow, is reached, the overflow bit is set at the output 26 of the counter 25 and the switch-on command is thus transmitted as a set bit.
  • the switch-on command is therefore set for the number of pulses received when the counter 25 has reached its maximum value and a carry is present. If there are no pulses due to missing data transmissions, the payer 25 is caused to count down by a circuit (not shown here), for example a monoflop. If the payer 25 reaches the value 0, then the time has expired after which the device is to be switched off in the manner shown. If impulses are registered again, the payer 25 pays upwards again from zero. 5b shows the analog detection circuit 32. The photodiode 22 receives the signals over the bus. These data signals are transmitted on the one hand to the pre-amplifier 20 and on the other hand to one
  • Integrator of the analog detection circuit 32 the integrator consisting of an operational amplifier 27 and a capacitor 28 connected in parallel.
  • the received optical pulses are thus integrated by the photodiode 22.
  • a comparator 29, here a Schmitt trigger, is connected downstream of the integrator. If the integration signal of the integrator reaches a predetermined value, the Schmitt trigger 29 sets its output, which leads to the functional network 50 and thus causes the switch 17 to be switched on. The switch 16 is switched on
  • FIG. 1 The method according to the invention is shown in FIG.
  • method step 33 it is recognized that no data traffic has taken place over the bus within a predetermined period of time, so that the device which is connected to the bus is to be switched off. Alternatively, this can be the case when there is no longer an authorized person in the vehicle, i.e. with electronic authorization, there was no one in the vehicle at the moment.
  • the bus manager 1 then issues the software command to switch off the device. The bus manager 1 does this in method step 34.
  • the processor 60 receives this software command via the bus and the detection circuits 32 and 31 and the bus driver circuit 8 and evaluates it.
  • the processor 60 then executes the method step 36 by setting the sleep variables on line 44 and the third output of the third bus driver circuit -8.
  • the functional network 50 thus opens the switch 15 and, via the output 12, the further voltage supplies, so that all components of the device connected to these voltage supplies and the bus driver circuit 8 are switched off. Since the sleep variable is also transmitted via line 44 to the electro-optical element 42, the switch 17 is opened there by the functional network 10 in order to remove the preamplifier 20 from the
  • Disconnect the power supply and switch 16 is also opened to disconnect the LED driver 18 from the power supply.
  • an input is then made on a device by a user, so that the device is to be switched on again.
  • this can also be the case if a person gets into the motor vehicle and triggers the switch-on signal with electronic authorization.
  • the turn is a predetermined number of pulses sent by the "bus manager 1 via the bus to the relevant device.
  • the analog detection circuit 32 receives the necessary number of pulses by means of the photodiode 22 and recognizes through the comparator 29 that the device has to be switched on again.
  • the switch 17 is then closed again by means of the functional network 50 in order to operate the preamplifier 20. Then the digital detection circuit

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

L'invention concerne un procédé destiné à actionner et arrêter un appareil relié à un bus dans un véhicule, l'appareil étant arrêté par l'intermédiaire d'un ordre logiciel et remis en marche au moyen d'un nombre prédéfini d'impulsions. Lors de l'arrêt de l'appareil, tous les composants de l'appareil sont arrêtés, à l'exception de circuits de détection. Ces circuits de détection sont conçus pour la réception optique ou électrique. Un circuit de détection optique présente une photodiode, un intégrateur, et un comparateur, tandis que le circuit de détection électrique présente une bascule bistable et un compteur. Un appareil est arrêté lorsqu'aucune donnée utile n'est transmise par l'intermédiaire du bus pour une durée prédéfinie, ou lorsque le véhicule est inoccupé. Un appareil est remis en marche lorsque des entrées utilisateur sont présentes, ou lorsqu'une personne autorisée se trouve dans le véhicule. Le procédé selon l'invention est particulièrement adapté à un bus selon IEEE1394B.
PCT/DE2001/002480 2000-07-10 2001-07-09 Procede destine a actionner et arreter un appareil relie a un bus dans un vehicule et dispositif destine a mettre en oeuvre ce procede Ceased WO2002023815A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10033257A DE10033257A1 (de) 2000-07-10 2000-07-10 Verfahren zum Ein- und Ausschalten von einem an einen Bus angeschlossenen Gerät in einem Kraftfahrzeug
DE10033257.9 2000-07-10

Publications (1)

Publication Number Publication Date
WO2002023815A1 true WO2002023815A1 (fr) 2002-03-21

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PCT/DE2001/002480 Ceased WO2002023815A1 (fr) 2000-07-10 2001-07-09 Procede destine a actionner et arreter un appareil relie a un bus dans un vehicule et dispositif destine a mettre en oeuvre ce procede

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DE (1) DE10033257A1 (fr)
WO (1) WO2002023815A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010122128A1 (fr) * 2009-04-22 2010-10-28 Patrick Reilly Système de câble à activation de dispositif sélective pour un véhicule

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076794A2 (fr) * 2001-03-08 2002-10-03 Siemens Vdo Automotive Corporation Systeme d'eveil pour composant electronique embarque dans un vehicule
DE10242051A1 (de) * 2002-09-11 2004-03-25 Adam Opel Ag Datenbussystem für ein Kraftfahrzeug mit mehreren Busteilnehmern
DE10330446B4 (de) * 2003-07-05 2007-04-26 Daimlerchrysler Ag Vorrichtung zur Steuerung der Betriebszustände bei Steuergeräten
JP4133897B2 (ja) * 2004-03-29 2008-08-13 シャープ株式会社 光受信機
DE102006004038A1 (de) 2005-10-25 2007-04-26 Siemens Ag Elektronsiches Steuergerät für Kraftfahrzeuge
DE102009015197A1 (de) 2009-03-31 2010-10-14 Volkswagen Ag Steuergerät für ein Fahrzeugnetzwerk und Verfahren zum Betreiben eines Fahrzeugnetzwerkes

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4987317A (en) * 1988-02-05 1991-01-22 Siemens-Bendix Automotive Electronics System for putting electronic units connected to a communications channel into an operational state or into a stand by state
EP0454534A1 (fr) * 1990-04-27 1991-10-30 Regie Nationale Des Usines Renault S.A. Dispositif de détection d'impulsions de courant
DE19708979A1 (de) * 1997-03-05 1998-09-24 Nokia Mobile Phones Ltd Kommunikationseinrichtung mit optischem Bus und Verfahren zu deren Betriebssteuerung
DE19840484A1 (de) * 1998-09-04 2000-03-09 Bosch Gmbh Robert Fahrzeugrechneranordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987317A (en) * 1988-02-05 1991-01-22 Siemens-Bendix Automotive Electronics System for putting electronic units connected to a communications channel into an operational state or into a stand by state
EP0454534A1 (fr) * 1990-04-27 1991-10-30 Regie Nationale Des Usines Renault S.A. Dispositif de détection d'impulsions de courant
DE19708979A1 (de) * 1997-03-05 1998-09-24 Nokia Mobile Phones Ltd Kommunikationseinrichtung mit optischem Bus und Verfahren zu deren Betriebssteuerung
DE19840484A1 (de) * 1998-09-04 2000-03-09 Bosch Gmbh Robert Fahrzeugrechneranordnung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010122128A1 (fr) * 2009-04-22 2010-10-28 Patrick Reilly Système de câble à activation de dispositif sélective pour un véhicule

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