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WO2002034579A1 - Circuit de commande pour au moins un element de protection de passagers d'un vehicule et methode d'essai correspondante - Google Patents

Circuit de commande pour au moins un element de protection de passagers d'un vehicule et methode d'essai correspondante Download PDF

Info

Publication number
WO2002034579A1
WO2002034579A1 PCT/DE2000/003796 DE0003796W WO0234579A1 WO 2002034579 A1 WO2002034579 A1 WO 2002034579A1 DE 0003796 W DE0003796 W DE 0003796W WO 0234579 A1 WO0234579 A1 WO 0234579A1
Authority
WO
WIPO (PCT)
Prior art keywords
evaluation unit
sensors
trigger signal
fire1
detected
Prior art date
Application number
PCT/DE2000/003796
Other languages
German (de)
English (en)
Inventor
Ernst Futterlieb
Claus Schmidt
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/DE2000/003796 priority Critical patent/WO2002034579A1/fr
Publication of WO2002034579A1 publication Critical patent/WO2002034579A1/fr

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
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
    • 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
    • B60R2021/01013—Means for detecting collision, impending collision or roll-over
    • B60R2021/01027—Safing sensors
    • 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
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
    • B60R2021/01325—Vertical acceleration
    • 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 control circuit for at least one occupant protection means in a motor vehicle according to the preamble of claim 1 and an associated test method according to claim 8.
  • occupant protection means such as airbags, sidebags or belt tensioners are used to reduce the severity of injuries to the occupants that occur in the event of an accident.
  • the occupant protection means are triggered here by a plurality of acceleration sensors, which are located in the
  • Motor vehicle are arranged and measure the acceleration occurring in an accident in each case in a predetermined direction. Since the individual acceleration sensors have different spatial orientations, both the direction and the magnitude of the acceleration can be calculated from the output signals of the acceleration sensors, the occupant protection means being activated when the magnitude of the acceleration exceeds a predetermined limit value (e.g. 10 g).
  • a predetermined limit value e.g. 10 g
  • a control circuit is known from German published patent application DE 196 45 952 A1 which evaluates the ess signals of a plurality of acceleration sensors in order to recognize an accident in the motor vehicle and activates the occupant protection means as a function of the measurement signals. Furthermore, it is known from this document to subject the measurement signals of the various acceleration sensors to a plausibility test in order to detect a malfunction of individual sensors or the control circuit. If the various acceleration sensors are arranged in a star shape in one plane, for example, the sum of the positive and negative accelerations measured by the acceleration sensors must be be zero. If the sum signal of the acceleration sensors deviates from this value, then there is a malfunction of one or more of the sensors or also of the control unit itself.
  • the known plausibility check of the measurement signals generated by the acceleration sensors described above thus advantageously enables the detection of a malfunction of the sensors or the evaluation unit analyzing the measurement signals of the acceleration sensors for accident detection.
  • the known plausibility check only enables a test on the sensor side of the evaluation unit, whereas errors on the actuator side of the evaluation unit remain undetected. For example, it is possible that an ignition switch for an occupant protection device is defective, so that the occupant protection device is not ignited in the event of an accident, although the evaluation unit detects an accident on the basis of the sensor signals. Another possible error on the actuator side is that the data transmission from the evaluation unit for the sensors to the ignition switches of the occupant protection means is disturbed. In the event of an accident, this can result in the occupant protection means not triggering, even though the evaluation unit emits an ignition signal for the sensors. In addition, if the data transmission between the evaluation unit and the ignition switches for the occupant protection means is disturbed, there is a risk of an occupant protection means being incorrectly triggered.
  • the invention is therefore based on the object of providing a control circuit for occupant protection means in a motor vehicle which offers increased security against errors on the actuator side.
  • the invention is based on the known control circuit described above according to the preamble of claim 1, by the characterizing features of claim 1 and. - With regard to a self-test procedure - solved by the features of claim 8.
  • the invention includes the general technical teaching for triggering the occupant protection means provide two inde ⁇ -independent evaluation units from each other, each generating an OFF solvent signal, wherein the trigger signals generated by the two evaluation units are linked by a logic circuit in such a manner that the occupant protection means only trigger when both trigger signals are present. In this way, it is largely prevented that disruptions in the data transmission from the evaluation units to the occupant protection means lead to incorrect triggering of the occupant protection means, since it is extremely unlikely that a corresponding disturbance will occur simultaneously in both evaluation units.
  • the evaluation units do not control the occupant protection means directly, but via a controllable switching element, the controllable one
  • Switching element for feedback of the respective switching state is connected to the first evaluation unit and / or the second evaluation unit.
  • This enables a self-test of the control circuit on the actuator side.
  • one evaluation unit generates a trigger signal for the occupant protection means independently of the sensor signals, while the other evaluation unit blocks the release of a trigger signal independently of the sensor signals. Due to the AND linkage of the trigger signals generated by the two evaluation units, there is no triggering of the occupant protection means on the actuator side during the self-test.
  • the switching state of the switching elements between the evaluation units and the occupant protection means is then queried and checked during the self-test. In this way, malfunctions in the data transmission from the evaluation units to the controllable switching elements for controlling the occupant protection means can be determined.
  • Other advantageous further developments are characterized in the Unteransprü ⁇ or are explained in greater detail below together with the description of the preferred embodiment with reference to FIGS. Show it:
  • FIGS. 2a-2d show a self-test method according to the invention
  • Figure 3 shows the arrangement of the acceleration sensors in a motor vehicle.
  • the control circuit shown in FIG. 1 has a plurality of acceleration sensors 1, 2, 3, which are arranged in a motor vehicle 4 in a horizontal plane at different angles to the longitudinal axis U of the motor vehicle 4, as can be seen from FIG. 3.
  • the two evaluation units 5, 6 enable the triggering of a plurality of occupant protection devices via the associated ignition electronics, only one assembly 7 with an airbag 8 as the occupant protection device being shown in dashed lines in FIG. 1.
  • the evaluation units 5, 6 can, however, independently of this, further assemblies with further occupant protection means such as, for example, sidebags, windowbags or control belt tensioners that are not shown for the sake of simplicity.
  • the assembly 7 has two controllable ignition switches 9, 10, which are controlled by the evaluation units 5 and 6 via a trigger signal FIRE1 and FIRE2, respectively, and connected on the output side to the airbag 8 via an AND element 11 are.
  • the airbag 8 is only triggered when both the evaluation unit 5 and the evaluation unit 6 emit a trigger signal FIRE1 or FIRE2 to the ignition switches 9, 10.
  • the AND combination of the two trigger signals FIRE1, FIRE2 offers the advantage that malfunctions in the data transmission between the evaluation units 5, 6 and the ignition switches 9, 10 do not lead to incorrect triggering.
  • the AND linkage of the trigger signals FIRE1, FIRE2 prevents a malfunction in one of the two evaluation units 5, 6 from causing the airbag 8 to trigger incorrectly.
  • the circuit shown in FIG. 1 enables a self-test on the sensor side, as will be described below and is shown in FIGS. 2a and 2b.
  • the control circuit 3 has excitation elements 12, 13, 14, each of which is assigned to one of the acceleration sensors 1, 2, 3 and enables separate mechanical excitation of the acceleration sensors 1, 2, 3 in order to simulate a malfunction of the remaining acceleration sensors.
  • the excitation element 12 is excited alone, only the acceleration sensor 1 detects an acceleration, whereas the acceleration sensors 2 and 3 do not detect any acceleration.
  • the evaluation units 5 and 6 internally carry out a plausibility check in which it is checked whether the acceleration values a x , a y , a 2 measured by the acceleration sensors 1, 2, 3 are consistent.
  • acceleration sensors 1, 2, 3 With proper functioning of the acceleration sensors 1, 2, 3 uss an excitation of a single acceleration Position sensor 1, 2 or 3 therefore lead to an incorrect plausibility check.
  • the individual acceleration sensors 1, 2, 3 are therefore individually excited one after the other by the associated excitation elements 12, 13, 14, as shown in FIGS. 2a and 2b.
  • the associated excitation elements 12, 13, 14, As shown in FIGS. 2a and 2b.
  • Evaluation units 5, 6 each carry out a plausibility check in order to check whether the respective acceleration sensor 1, 2 or 3 is working correctly. If all acceleration sensors 1, 2, 3 are functioning properly, the plausibility check must show that the acceleration values a x , a y , a z measured by the acceleration sensors 1, 2, 3 are not consistent.
  • control circuit shown in FIG. 1 also enables testing on the actuator side, which is shown in the form of a flow chart in FIGS. 2c and 2d.
  • the ignition switch 9 is connected to the evaluation unit 6 in order to enable feedback of the switching state of the ignition switch 9.
  • the ignition switch 10 is connected to the evaluation unit 5 in order to transmit to the evaluation unit 5 a feedback signal FEEDBACK2 for the switching state of the ignition switch 10.
  • the evaluation unit 5 first transmits a control signal to the evaluation unit 6, so that the latter blocks the trigger signal FIRE2 so that the airbag 8 is prevented from being triggered during the self-test.
  • the evaluation unit 5 then generates the trigger signal FIRE1 in order to switch on the ignition switch 9.
  • the evaluation unit 6 queries the feedback signal FEEDBACK1 from the ignition switch 9, which reflects the switching state of the ignition switch 9.
  • the evaluation unit 6 then transmits the feedback signal FEEDBACK1 to the evaluation unit 5, which checks it. In the event of an error-free data transmission from the evaluation unit 5 to the ignition switch 9, the feedback signal must be generated.
  • FEEDBACKl indicate that the ignition switch 9 has ignited.
  • the feedback signal FEEDBACK1 indicates that the ignition switch 9 has not ignited.
  • FIG. 2d the data transmission between the evaluation unit 6 and the ignition switch 10 is then checked, which is shown in FIG. 2d in the form of a flow chart.
  • the evaluation unit 5 first blocks the release of the trigger signal FIRE1.
  • the evaluation unit 5 controls the evaluation unit 6 so that it generates the trigger signal FIRE2.
  • the evaluation unit 5 queries the feedback signal FEEDBACK2 from the ignition switch 10 and checks it.
  • the feedback signal FEEDBACK2 In the event of a correct data transmission between the evaluation unit 6 and the ignition switch 10, the feedback signal FEEDBACK2 must indicate that the ignition switch 10 has switched through.
  • the feedback signal FEEDBACK2 indicates that the ignition switch 10 has not switched through.
  • the two evaluation units are also connected to a configuration controller and peripheral sensors 15, for example to block an airbag deployment when a person is at a short distance in front of the airbag in order to prevent an occupant injury from an airbag deployment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un circuit de commande pour au moins un élément de protection de passagers (8) d'une automobile, comportant plusieurs détecteurs (1, 2, 3) pour détecter dans chaque cas une grandeur d'état de l'automobile, une première unité d'évaluation (5) reliée aux détecteurs (1, 2, 3) côté entrée et servant à produire un premier signal de déclenchement (FIRE1) pour activer l'élément de protection des passagers (8) en fonction des grandeurs d'état détectées, ainsi qu'une seconde unité d'évaluation (6) reliée aux détecteurs (1, 2, 3) côté entrée, pour produire un second signal de déclenchement (FIRE2) pour activer l'élément de protection des passagers (8) en fonction des grandeurs d'état détectées. La première unité d'évaluation (5) et la seconde unité d'évaluation (6) sont reliées côté sortie à l'élément de protection des passagers (9) par un circuit logique (11) qui déclenche l'élément de protection des passagers (8) lorsque le premier signal de déclenchement (FIRE1), aussi bien que le second signal de déclenchement (FIRE2) sont présents.
PCT/DE2000/003796 2000-10-25 2000-10-25 Circuit de commande pour au moins un element de protection de passagers d'un vehicule et methode d'essai correspondante WO2002034579A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/DE2000/003796 WO2002034579A1 (fr) 2000-10-25 2000-10-25 Circuit de commande pour au moins un element de protection de passagers d'un vehicule et methode d'essai correspondante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2000/003796 WO2002034579A1 (fr) 2000-10-25 2000-10-25 Circuit de commande pour au moins un element de protection de passagers d'un vehicule et methode d'essai correspondante

Publications (1)

Publication Number Publication Date
WO2002034579A1 true WO2002034579A1 (fr) 2002-05-02

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Application Number Title Priority Date Filing Date
PCT/DE2000/003796 WO2002034579A1 (fr) 2000-10-25 2000-10-25 Circuit de commande pour au moins un element de protection de passagers d'un vehicule et methode d'essai correspondante

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Country Link
WO (1) WO2002034579A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004065163A3 (fr) * 2003-01-23 2004-10-07 Siemens Vdo Automotive Corp Systeme de retenue de passager de vehicule presentant des capteurs repartis
WO2006084884A1 (fr) * 2005-02-11 2006-08-17 Siemens Aktiengesellschaft Procede et dispositif pour detecter une collision avec un pieton
WO2007036549A1 (fr) * 2005-09-30 2007-04-05 Continental Automotive Gmbh Dispositif et procede pour declencher un dispositif de protection des passagers d'un vehicule automobile
CN103534146A (zh) * 2011-05-10 2014-01-22 罗伯特·博世有限公司 用于检验传感器信号和触发乘员保护装置的方法和装置
US20210268982A1 (en) * 2018-09-24 2021-09-02 Robert Bosch Gmbh Method and device for monitoring a motorcycle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645952A1 (de) 1996-11-07 1998-05-20 Siemens Ag Steueranordnung für ein Rückhaltemittel in einem Kraftfahrzeug
DE19807124A1 (de) * 1998-02-20 1999-09-02 Bosch Gmbh Robert Verfahren und Vorrichtung zum Auslösen eines Rückhaltesystems
DE19852468A1 (de) * 1998-11-13 2000-05-25 Siemens Ag Steueranordnung für ein Insassenschutzmittel eines Fahrzeugs
US6070113A (en) * 1996-06-21 2000-05-30 Automotive Systems Laboratory, Inc. Hybrid vehicle crash discrimination system
WO2000041918A1 (fr) * 1999-01-12 2000-07-20 Siemens Aktiengesellschaft Systeme de commande pour moyens de protection pour passagers d'une automobile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070113A (en) * 1996-06-21 2000-05-30 Automotive Systems Laboratory, Inc. Hybrid vehicle crash discrimination system
DE19645952A1 (de) 1996-11-07 1998-05-20 Siemens Ag Steueranordnung für ein Rückhaltemittel in einem Kraftfahrzeug
DE19807124A1 (de) * 1998-02-20 1999-09-02 Bosch Gmbh Robert Verfahren und Vorrichtung zum Auslösen eines Rückhaltesystems
DE19852468A1 (de) * 1998-11-13 2000-05-25 Siemens Ag Steueranordnung für ein Insassenschutzmittel eines Fahrzeugs
WO2000041918A1 (fr) * 1999-01-12 2000-07-20 Siemens Aktiengesellschaft Systeme de commande pour moyens de protection pour passagers d'une automobile

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004065163A3 (fr) * 2003-01-23 2004-10-07 Siemens Vdo Automotive Corp Systeme de retenue de passager de vehicule presentant des capteurs repartis
US7324900B2 (en) 2003-01-23 2008-01-29 Siemens Vdo Automotive Corporation Vehicle passenger restraint system with distributed sensors
DE102005006401B4 (de) * 2005-02-11 2007-04-19 Siemens Ag Vorrichtung zum Erkennen eines Fußgängeraufpralls
WO2006084884A1 (fr) * 2005-02-11 2006-08-17 Siemens Aktiengesellschaft Procede et dispositif pour detecter une collision avec un pieton
DE102005006401A1 (de) * 2005-02-11 2006-08-31 Siemens Ag Verfahren und Vorrichtung zum Erkennen eines Fußgängeraufpralls
WO2007036549A1 (fr) * 2005-09-30 2007-04-05 Continental Automotive Gmbh Dispositif et procede pour declencher un dispositif de protection des passagers d'un vehicule automobile
DE102005046929B3 (de) * 2005-09-30 2007-04-12 Siemens Ag Vorrichtung und Verfahren zum Auslösen einer Insassenschutzvorrichtung eines Kraftfahrzeuges
JP2009509846A (ja) * 2005-09-30 2009-03-12 コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツング 自動車の乗員保護装置をトリガするための装置および方法
US7902974B2 (en) * 2005-09-30 2011-03-08 Siemens Aktiengesellschaft Device and method for triggering a vehicle occupant protection device of a motor vehicle
CN103534146A (zh) * 2011-05-10 2014-01-22 罗伯特·博世有限公司 用于检验传感器信号和触发乘员保护装置的方法和装置
CN103534146B (zh) * 2011-05-10 2016-08-17 罗伯特·博世有限公司 用于检验传感器信号和触发乘员保护装置的方法和装置
US9950684B2 (en) 2011-05-10 2018-04-24 Robert Bosch Gmbh Method and device for checking a sensor signal and for actuating a passenger protection means of a vehicle
US20210268982A1 (en) * 2018-09-24 2021-09-02 Robert Bosch Gmbh Method and device for monitoring a motorcycle
US11618400B2 (en) * 2018-09-24 2023-04-04 Robert Bosch Gmbh Method and device for monitoring a motorcycle

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