EP1853467A1 - System zur überprüfung der funktionsfähigkeit einer sensoreinrichtung - Google Patents

System zur überprüfung der funktionsfähigkeit einer sensoreinrichtung

Info

Publication number
EP1853467A1
EP1853467A1 EP06708179A EP06708179A EP1853467A1 EP 1853467 A1 EP1853467 A1 EP 1853467A1 EP 06708179 A EP06708179 A EP 06708179A EP 06708179 A EP06708179 A EP 06708179A EP 1853467 A1 EP1853467 A1 EP 1853467A1
Authority
EP
European Patent Office
Prior art keywords
sensor device
sensor
sensor elements
evaluation
functionality
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Withdrawn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
EP06708179A
Other languages
German (de)
English (en)
French (fr)
Inventor
Thomas Fischer
Helmuth Orlogi
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP1853467A1 publication Critical patent/EP1853467A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R21/38Protecting non-occupants of a vehicle, e.g. pedestrians using means for lifting bonnets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013Electrical 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
    • B60R21/0134Electrical 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 imminent contact with an obstacle, e.g. using radar systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/01122Prevention of malfunction
    • B60R2021/01184Fault detection or diagnostic circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34Protecting non-occupants of a vehicle, e.g. pedestrians

Definitions

  • a pedestrian protection system In the field of protective systems in motor vehicles, the introduction of a pedestrian protection system has been discussed for some time in addition to occupant protection. Such a system is intended to detect whether there is a collision of the vehicle with a pedestrian and, if appropriate, suitable protective mechanisms should be activated.
  • Such protective mechanisms may be, for example, airbags on the bonnet or on the A-pillars of the vehicle or a positioning of the bonnet by a few centimeters, in order to soften the impact of the pedestrian's head on the bonnet.
  • DE 100 30 465 A1 proposes to provide sensors on the bumper and on the bonnet of the vehicle, which sensors can detect a typical pedestrian impact in terms of their time sequence.
  • Sensors are there strain gauges or piezoresistive films but also optical sensors having a pressure-dependent light transmission, proposed.
  • another decision criterion is formed by determining the speed and / or acceleration changes of the vehicle caused by an impact, and then comparing these speed and / or acceleration changes with reference variables which typical of a pedestrian impact.
  • the sensors of this pedestrian impact device - both the optical sensors and the acceleration sensors - are connected with their data lines directly to the central control unit, so that a high cabling is required, which is in fact still greater due to the requirement of supply voltage lines for the individual sensors.
  • the use of two sensors ren to increase reliability consuming and therefore expensive.
  • the invention is therefore based on the object, a system with a sensor device formed with at least one sensor element, which is connected to an evaluation unit for generating a signal indicating an impact, indicate that can be checked in a simple manner on the functioning of the sensor device.
  • a second evaluation unit synchronized with the first evaluation unit is provided in such a way that the sensor unit can be controlled by the two evaluation units in time division multiplex mode.
  • the functionality of the sensor device can be checked in a simple manner and in an advantageous embodiment of the invention in case of lack of functionality of the sensor device to a connected to the evaluation central control unit an error signal are transmitted, which blocks the triggering of a pedestrian protection.
  • each sensor element can be checked separately. In the event that a sensor element is defective, the system can continue to be operated with the remaining functional sensor elements in an emergency operation, wherein in development of the invention, each non-functional sensor element is individually deactivated.
  • the transmission of the error signal by modulation of the current on a supply Voltage line between the evaluation and the central control unit to accomplish.
  • a data transmission line can be saved.
  • the individual sensor elements can be interrogated one after the other.
  • individual defective sensor elements can be identified and thus individually deactivated.
  • Figure 1 is a schematic representation of an inventive
  • Figure 2 is a schematic representation of the temporal sequence of sensor device queries.
  • FIG. 1 shows a sensor device 1, which in the example shown is formed with four sensor elements 2.
  • the sensor device is connected on the one hand by means of four lines to a first evaluation unit 3 and on the other hand by means of likewise four lines to a second evaluation unit 4. It is connected as each sensor element 2 with its own line to both the first and the second evaluation unit 3, 4.
  • the first evaluation unit 3 can check the functionality of the sensor elements 2 of the sensor device 1, but can also determine by evaluating the signals of the sensor elements 2 whether a force has taken place, for example, due to the impact on the bumper of a vehicle in which the sensor device 1 is arranged ,
  • the sensor elements 2 of the sensor device 1 can be formed with any type of pressure-sensitive sensors, where in a particularly advantageous manner, a fiber optic sensor is used whose optical conductivity changes by the action of a force, so that it can be determined by measuring the light intensity in the first evaluation unit 3, whether the optical fiber has been deformed.
  • the first evaluation unit 3 can be advantageously formed with a microprocessor.
  • the second evaluation unit 4 is only intended to check the functionality of the sensor elements 2 of the sensor device 1 and can therefore be made simpler. However, it is also possible to use a microprocessor for this as well. A check of the functionality of the sensor elements 3 of the sensor device 1 can be effected, for example, by the fact that in the case of the use of optical fibers as sensor elements 2 it is checked whether the received light intensity corresponds to an expected light intensity.
  • the first evaluation unit 3 and the second evaluation unit 4 deliver according to their evaluation of the signals of the sensor device 1 output signals to a central control unit 5.
  • This is connected via a supply voltage line 8 with the two evaluation units 3, 4, whereby this with a supply voltage be supplied.
  • the output signals of the two evaluation units 3 and 4 are linked together, which is indicated by a logic gate 6, whereby the triggering of a pedestrian protection means 7, which in the illustrated embodiment as hinged Bonnet is shown, in the presence of a lack of functionality of the sensor device 1 can be disabled.
  • each individual sensor element 2 can be determined and, if only a few sensor elements Mente 2 are recognized as defective, an emergency operation with the remaining sensor elements 2 are maintained. Accordingly, the processing of the signals of the first evaluation device 3 due to the defective sensor elements 2 in the central control unit 5 can be prevented.
  • the signal of the second evaluation unit 4 may alternatively by modulation of
  • the modulation can be performed in the second evaluation unit 4 by charging the supply voltage line 8 with a variable resistor, for example the load path of a
  • both evaluation units 3, 4 are connected to the sensor elements 2 of the sensor device 1, the interrogation of the sensor elements 2 takes place according to the invention in time division multiplex mode, which is shown schematically in FIG.
  • a sensor value is measured by the first evaluation unit 3.
  • the sensor is then checked for correct operation by the second evaluation unit 4. This process can be repeated periodically in an advantageous manner.
  • the sensor elements 2 can all be queried simultaneously or, as shown in the example of FIG. 2, in successive time slots.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Traffic Control Systems (AREA)
EP06708179A 2005-02-28 2006-02-10 System zur überprüfung der funktionsfähigkeit einer sensoreinrichtung Withdrawn EP1853467A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005009102A DE102005009102B4 (de) 2005-02-28 2005-02-28 System zur Überprüfung der Funktionsfähigkeit einer Sensoreinrichtung
PCT/EP2006/050836 WO2006092357A1 (de) 2005-02-28 2006-02-10 System zur überprüfung der funktionsfähigkeit einer sensoreinrichtung

Publications (1)

Publication Number Publication Date
EP1853467A1 true EP1853467A1 (de) 2007-11-14

Family

ID=36201376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708179A Withdrawn EP1853467A1 (de) 2005-02-28 2006-02-10 System zur überprüfung der funktionsfähigkeit einer sensoreinrichtung

Country Status (7)

Country Link
US (1) US20070277584A1 (zh)
EP (1) EP1853467A1 (zh)
JP (1) JP2008513278A (zh)
KR (1) KR20070088530A (zh)
CN (1) CN100475616C (zh)
DE (1) DE102005009102B4 (zh)
WO (1) WO2006092357A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8166795B2 (en) * 2009-11-30 2012-05-01 Eaton Corporation Out-of-range sensor recalibration
DE102011080511A1 (de) * 2011-08-05 2013-02-07 Robert Bosch Gmbh Schaltungsanordnung und Verfahren zur Plausibilisierung von Sensorsignalen
WO2015171649A1 (en) * 2014-05-05 2015-11-12 Sonam Technologies, Llc Apparatus, system and methods for determining the impact attenuation of a surface

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US3921129A (en) * 1971-05-10 1975-11-18 Toyo Kogyo Co Malfunction preventive system for use in an air bag incorporating a sensor for detecting the collision speed of a vehicle
DE3811217A1 (de) * 1988-04-02 1989-10-12 Bosch Gmbh Robert Elektronische einrichtung
US5253510A (en) * 1989-06-22 1993-10-19 I C Sensors Self-testable micro-accelerometer
JPH03109163A (ja) * 1989-09-21 1991-05-09 Sumitomo Electric Ind Ltd 加速度センサの故障検出装置
DE69025616T2 (de) * 1990-12-17 1996-08-14 United Technologies Automotive Einleiter-Kraftfahrzeug-Multiplex-Anlage, die zufällig reflektierte Infrarote Wellen benutzt
JPH05238348A (ja) * 1991-03-13 1993-09-17 Zexel Corp 車両安全装置の制御システム
US5543776A (en) * 1993-10-19 1996-08-06 Whistler Corporation Vehicle security system
DE4439886A1 (de) * 1994-03-12 1995-09-14 Bosch Gmbh Robert Elektronisches Gerät mit einem beschleunigungsempfindlichen Sensor
JP3246833B2 (ja) * 1994-07-08 2002-01-15 株式会社日立製作所 自動車制御装置及び自動車制御方法
DE19740021A1 (de) * 1997-09-11 1999-03-25 Siemens Ag Einrichtung für den Insassenschutz in einem Kraftfahrzeug
US6169479B1 (en) * 1998-10-23 2001-01-02 Visteon Global Technologies, Inc. Vehicular deformation sensor system
DE19909297B4 (de) * 1999-03-03 2004-11-18 Siemens Ag Steuersystem für ein Insassenschutzsystem
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EP1311411B1 (de) * 2000-08-22 2004-05-12 Siemens Aktiengesellschaft Steuerschaltung für ein insassenschutzmittel in einem kraftfahrzeug und zugehöriges betriebsverfahren
DE10057916C2 (de) * 2000-11-21 2003-04-17 Bosch Gmbh Robert Steuergerät für ein Rückhaltesystem in einem Kraftfahrzeug
EP1467897B1 (en) * 2002-01-23 2005-08-10 Siemens VDO Automotive Corporation Method and apparatus for determining deployment of a safety restraint device in an occupant restraining system
DE10237160A1 (de) * 2002-08-14 2004-02-26 Robert Bosch Gmbh Vorrichtung zur Aufprallsensierung mit wenigstens zwei Drucksensoren
DE10321678A1 (de) * 2003-05-14 2004-12-09 Siemens Ag Verfahren und Vorrichtungen zur Übertragung von Daten auf einer Datenleitung zwischen einem zentralen Steuergerät und mindestens einer Datenverarbeitungsgeräteschnittstelle mindestens eines dezentralen Datenverarbeitungsgeräts
ES2228262B1 (es) * 2003-06-20 2006-02-16 Sistemas Integrados Para La Automocion, S.L. Sistema de cableado digital para vehiculos.

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Also Published As

Publication number Publication date
DE102005009102A1 (de) 2006-09-14
KR20070088530A (ko) 2007-08-29
JP2008513278A (ja) 2008-05-01
DE102005009102B4 (de) 2009-12-03
CN101031458A (zh) 2007-09-05
CN100475616C (zh) 2009-04-08
US20070277584A1 (en) 2007-12-06
WO2006092357A1 (de) 2006-09-08

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