DE10244730A1 - Side impact detector for motor vehicle has airflow sensor in side chamber of vehicle connected to analyzer and safety system actuator - Google Patents
Side impact detector for motor vehicle has airflow sensor in side chamber of vehicle connected to analyzer and safety system actuator Download PDFInfo
- Publication number
- DE10244730A1 DE10244730A1 DE10244730A DE10244730A DE10244730A1 DE 10244730 A1 DE10244730 A1 DE 10244730A1 DE 10244730 A DE10244730 A DE 10244730A DE 10244730 A DE10244730 A DE 10244730A DE 10244730 A1 DE10244730 A1 DE 10244730A1
- Authority
- DE
- Germany
- Prior art keywords
- sensor
- side impact
- air flow
- vehicle
- cavity
- 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- Withdrawn
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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
- 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
-
- 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
- B60R2021/0002—Type of accident
- B60R2021/0006—Lateral collision
-
- 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
- B60R21/0134—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 imminent contact with an obstacle, e.g. using radar systems
- B60R2021/01345—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 imminent contact with an obstacle, e.g. using radar systems using mechanical sensing means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung zur Seitenaufprallerkennung bei einem Fahrzeug gemäß dem Oberbegriff des Patentanspruchs 1, auf ein Verfahren zur Seitenaufprallerkennung gemäß dem Oberbegriff des Patentanspruchs 7, auf einen Sensor zur Seitenaufprallerkennung gemäß Patentanspruch 6 sowie auf die Verwendung eines Luftströmungssensors zur Seitenaufprallerkennung gemäß Anspruch 11.The invention relates to a Device for side impact detection in a vehicle according to the preamble of claim 1, on a method for side impact detection according to the generic term of claim 7, on a sensor for side impact detection according to claim 6 and the use of an airflow sensor for side impact detection according to claim 11th
Die Seitenaufprallerkennung dient dazu, infolge eines Seitenaufpralls schnellstmöglich ein Sicherheitssystem wie beispielsweise einen Seitenairbag auszulösen. Eine Seitenairbagauslösung muß in kürzester Zeit erfolgen. Die für eine wirksame Auslösung notwendigen Auslösezeiten liegen im Falle von High-Speed-Crashs unterhalb von 10 ms.The side impact detection serves a safety system as soon as possible as a result of a side impact such as deploying a side airbag. A side airbag deployment must be carried out in the shortest possible time Time. The for an effective trigger necessary trigger times are below 10 ms in the case of high-speed crashes.
Zur Seitenaufprallerkennung ist die beschleunigungsbasierende Crashdetektion bekannt. Hierbei steht für die Crashdetektion in der Regel lediglich ein Beschleunigungspeak zur Verfügung. Oftmals ist es nicht möglich, die Ursache eines solchen Peaks ausschließlich auf einen Crash zurückzuführen. Um einen Crash sauber von anderen Einwirkungen auf die Karosserie unterscheiden zu können, ist es bekannt, ein zweites, unabhängiges Meßprinzip anzuwenden.For side impact detection is the acceleration-based crash detection known. It says for the Crash detection is usually only an acceleration peak Available. Often it is not possible the cause of such a peak can only be attributed to a crash. Around distinguish a crash from other effects on the body to be able it is known to use a second, independent measuring principle.
Ein weiteres Meßprinzip zur Seitenaufprallerkennung
ist aus der
Weiterhin ist aus der
Der Erfindung liegt die Aufgabe zugrunde, ein weiteres, alternativ verwendbares Meßprinzip zur Seitenaufprallerkennung bei einem Fahrzeug zur Verfügung zu stellen.The invention is based on the object Another measuring principle that can be used alternatively for side impact detection available for a vehicle to deliver.
Diese Aufgabe wird erfindungsgemäß hinsichtlich der Vorrichtung dadurch gelöst, daß der mindestens eine Sensor ein die Luftströmung im Hohlraum messender Luftströmungssensor ist und daß die Auswerteinrichtung ein Ansteigen der Luftströmung, die aufgrund einer adiabatischen Zustandsänderung im Hohlraum auftritt und vom Luftströmungssensor gemessen wird, zur Seitenaufprallerkennung verwendet.This object is achieved according to the invention the device solved by that the at least one sensor measuring the air flow in the cavity Air flow sensor is and that the Evaluation device an increase in air flow due to an adiabatic change in condition occurs in the cavity and is measured by the air flow sensor, used for side impact detection.
Hinsichtlich des Verfahrens wird diese Aufgabe erfindungsgemäß dadurch gelöst, daß mittels des mindestens einen Sensors die im Hohlraum auftretende Luftströmung gemessen wird und die Auswerteinrichtung einen Seitenaufprall erkennt, wenn die Luftströmung aufgrund einer adiabatischen Zustandsänderung im Hohlraum einen voreinstellbaren Schwellenwert überschreitet.Regarding the procedure this task according to the invention solved, that by means of at least one sensor measured the air flow occurring in the cavity is and the evaluation device detects a side impact when the airflow due to an adiabatic change in state in the cavity exceeds a presettable threshold.
Weiterhin wird die Aufgabe erfindungsgemäß durch einen Sensor zur Seitenaufprallerkennung, der in einem als Hohlraum ausgebildeten Seitenteil eines Kraftfahrzeugs angeordnet ist, gelöst, der dadurch gekennzeichnet ist, daß er als ein Luftströmungssensor zur Erkennung der im Hohlraum aufgrund einer adiabatischen Zustandsänderung auftretenden Luftströmung ausgebildet ist.Furthermore, the object is achieved according to the invention a sensor for side impact detection in a cavity trained side part of a motor vehicle is arranged, the is characterized in that he as an air flow sensor to detect the in the cavity due to an adiabatic change in state occurring air flow is trained.
Gemäß einem weiteren Aspekt der Erfindung wird die Aufgabe gelöst durch Verwendung eines Luftströmungssensors zur Seitenaufprallerkennung bei einem Fahrzeug aufgrund einer adiabatischen Zustandsänderung in einem Hohlraum eines Seitenteils des Fahrzeugs.According to another aspect of Invention, the object is achieved by using an air flow sensor for side impact detection in a vehicle due to an adiabatic change in condition in a cavity of a side part of the vehicle.
Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous further developments of Invention result from the subclaims.
Die Erfindung geht von folgenden Überlegungen aus. Wenn bei einem Seitencrash die Fahrzeugtür deformiert wird, so befindet sich das in der Fahrzeugtür eingeschlossene Luftvolumen in der Anfangsphase des Crashs, d.h. in den ersten 10 bis 20 ms nicht im thermischen Gleichgewicht mit der umgebenden Luft. Dadurch ist die Zustandsänderung des von der Tür umschlossenen Gases adiabatischer Natur. Die adiabatische Zustandsänderung äußert sich dadurch, daß zum einen der Druck des Gases erhöht wird, daß sich zum anderen die Temperatur des Gases erhöht und daß schließlich eine Luftströmung entsteht. Die vorliegende Erfindung nutzt das zuletzt genannte Phänomen aus. Es wird also die Messung der durch die adiabatische Zustandsänderung eines Volumens erzeugte Luftströmung vorgeschlagen, wobei das Volumen beispielsweise das Volumen einer Seitentür des Fahrzeugs sein kann oder auch das Volumen eines anderen Hohlraums eines Seitenteils der Fahrzeugkarosserie.The invention is based on the following considerations out. If the vehicle door is deformed in a side crash, it is located in the vehicle door trapped air volume in the initial phase of the crash, i.e. not in thermal equilibrium for the first 10 to 20 ms the surrounding air. This changes the state of the one enclosed by the door Gases of an adiabatic nature. The adiabatic change of state is expressed by that for one the pressure of the gas is increased that itself on the other hand the temperature of the gas increases and that finally an air flow arises. The present invention takes advantage of the latter phenomenon. So it becomes the measurement of the adiabatic state change of a volume of air flow generated proposed, the volume for example the volume of a side door of the vehicle or the volume of another cavity a side part of the vehicle body.
Bei einer typischen Auslöseschwelle eines Druckanstiegs von 35 mbar beträgt die Luftströmungsgeschwindigkeit ca. 73 m/s. Solche Strömungsgeschwindigkeiten können präzise und kostengünstig über auf unterschiedlichen Meßprinzipien basierende Meßgeräte ertaßt werden.At a typical trigger threshold a pressure increase of 35 mbar is the air flow rate approx. 73 m / s. Such flow rates can precise and inexpensive about on based on different measuring principles Measuring devices are detected.
In bevorzugter Weiterbildung der Erfindung ist vorgesehen, daß zur Messung der Luftströmung ein thermischer Strömungssensor an sich bekannter Bauart Verwendung findet. In alternativer Weise kann ein Ultraschall-Anemometer Verwendung finden.In a preferred development of the invention it is provided that for measuring the air flow a thermal flow sensor of known design is used. Alternatively, an ultrasound anemometer can be used.
In bevorzugter Weiterbildung der Erfindung ist vorgesehen, daß die Vorrichtung zur Seitenaufprallerkennung mindestens einen zusätzlichen, nach einem anderen Prinzip arbeitenden Sensor zur Seitenaufprallerkennung umfaßt, der mit einer zusätzlichen Auswerteinrichtung zum Auswerten der Signale aus dem mindestens einen zusätzlichen Sensor und Erkennen eines Seitenaufpralls verbunden ist, wobei der mindestens eine zusätzliche Sensor insbesondere ein Beschleunigungssensor sein kann. Es wird in diesem Fall somit parallel nach zwei unterschiedlichen Meßverfahren gemessen und das Insassenschutzsystem wird nur dann ausgelöst, wenn sowohl die Auswerteinrichtung des Strömungssensors als auch die Auswerteinrichtung des Beschleunigungssensors einen Seitenaufprall erkennen. Hierdurch werden mögliche Fehlauslösungen des Insassenschutzsystems auf ein Minimum reduziert.In a preferred further education of Invention is provided that the Device for side impact detection at least one additional, A sensor for side impact detection operating on a different principle comprises the one with an additional Evaluation device for evaluating the signals from the at least An additional Sensor and detection of a side impact is connected, the at least one additional Sensor in particular can be an acceleration sensor. It will in this case thus in parallel according to two different measuring methods measured and the occupant protection system is only triggered if both the evaluation device of the flow sensor and the evaluation device detect a side impact of the acceleration sensor. This will possible false alarms of the occupant protection system reduced to a minimum.
In alternativer Weise kann vorgesehen sein, daß das Insassenschutzsystem dann ausgelöst wird, wenn entweder die dem Strömungssensor zugeordnete Auswerteinrichtung oder die dem weiteren Sensor, also beispielsweise dem Beschleunigungssensor zugeordnete Auswerteinrichtung einen Seitenaufprall erkennt. In diesem Fall wird erreicht, daß das Personenschutzsystem mit hoher Sicherheit ausgelöst wird, selbst wenn eines der beiden Meßsysteme einen Seitenaufprall nicht als solchen erkennen sollte.Alternatively, can be provided be that Occupant protection system then triggered will if either the the flow sensor assigned evaluation device or the further sensor, that is for example, evaluation device assigned to the acceleration sensor detects a side impact. In this case, the personal protection system is achieved triggered with high certainty will, even if one of the two measuring systems has a side impact shouldn't recognize it as such.
Im folgenden werden mehrere Ausführungsbeispiele der Erfindung anhand der Zeichnung näher beschrieben. In der Zeichnung zeigen in schematischer Darstellung:The following are several embodiments the invention described in more detail with reference to the drawing. In the drawing show in a schematic representation:
Zunächst wird auf
Als Luftströmungssensoren können solche bekannter Bauart Verwendung finden. Beispielsweise wird verwiesen auf die Veröffentlichung "HSG-IMIT Anwendungsbericht SE 030", die einen thermischen Strömungssensor offenbart, oder auf "Dostmann-Electronic, Katalog 2002/2003", der einen Ultraschall-Strömungssensor zeigt.Those known as air flow sensors can be known Find design use. For example, reference is made to the Publication "HSG-IMIT application report SE 030 ", which is a thermal flow sensor disclosed, or on "Dostmann-Electronic, Catalog 2002/2003 ", which is an ultrasonic flow sensor shows.
Weiterhin versteht es sich, daß im Kraftfahrzeug
mehrere Strömungssensoren
Der Strömungssensor
Auch kann die Auslöseeinheit
Im Falle des weiteren Ausführungsbeispiels gemäß
Selbstverständlich können gegebenenfalls mehrere
Beschleunigungssensoren
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10244730A DE10244730A1 (en) | 2002-09-25 | 2002-09-25 | Side impact detector for motor vehicle has airflow sensor in side chamber of vehicle connected to analyzer and safety system actuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE10244730A DE10244730A1 (en) | 2002-09-25 | 2002-09-25 | Side impact detector for motor vehicle has airflow sensor in side chamber of vehicle connected to analyzer and safety system actuator |
Publications (1)
Publication Number | Publication Date |
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DE10244730A1 true DE10244730A1 (en) | 2004-04-01 |
Family
ID=31969593
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DE10244730A Withdrawn DE10244730A1 (en) | 2002-09-25 | 2002-09-25 | Side impact detector for motor vehicle has airflow sensor in side chamber of vehicle connected to analyzer and safety system actuator |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1738967A1 (en) * | 2005-06-30 | 2007-01-03 | Delphi Technologies, Inc. | Dual sensor satellite module for a vehicle supplemental restraint system |
EP1695875A3 (en) * | 2005-02-25 | 2007-08-22 | Denso Corporation | Starting device of passenger protection apparatus |
DE102006051295A1 (en) * | 2006-10-13 | 2008-04-17 | Gebr. Schmidt Fabrik für Feinmechanik GmbH & Co. KG | Sensor element for a collision sensor |
DE102006050098B4 (en) * | 2005-10-28 | 2008-07-03 | Denso Corp., Kariya | Collision detection device |
DE102006048876B4 (en) * | 2005-11-04 | 2008-07-31 | Denso Corp., Kariya | Collision detection system |
DE102008008082A1 (en) | 2008-01-29 | 2009-08-13 | Gebr. Schmidt Fabrik für Feinmechanik GmbH & Co. KG | Deformation collision sensor and method for checking its function |
DE102012018214A1 (en) | 2012-09-14 | 2014-03-20 | Audi Ag | Motor vehicle with an occupant protection device |
US11512861B2 (en) | 2020-07-01 | 2022-11-29 | International Business Machines Corporation | Anomaly detection based on airflow measurement |
US11585557B2 (en) | 2020-07-01 | 2023-02-21 | International Business Machines Corporation | Anomaly detection based on airflow alerters |
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2002
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DE4220270A1 (en) * | 1992-06-20 | 1993-12-23 | Bosch Gmbh Robert | Safety appts. for vehicle occupants - uses acceleration sensors at pillars and deformation sensors in doors, for each side of vehicle |
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Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1695875A3 (en) * | 2005-02-25 | 2007-08-22 | Denso Corporation | Starting device of passenger protection apparatus |
EP1738967A1 (en) * | 2005-06-30 | 2007-01-03 | Delphi Technologies, Inc. | Dual sensor satellite module for a vehicle supplemental restraint system |
DE102006050098B4 (en) * | 2005-10-28 | 2008-07-03 | Denso Corp., Kariya | Collision detection device |
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DE102012018214A1 (en) | 2012-09-14 | 2014-03-20 | Audi Ag | Motor vehicle with an occupant protection device |
DE102012018214B4 (en) * | 2012-09-14 | 2014-04-30 | Audi Ag | Motor vehicle with an occupant protection device |
US8844968B2 (en) | 2012-09-14 | 2014-09-30 | Audi Ag | Motor vehicle with occupant protection device |
US11512861B2 (en) | 2020-07-01 | 2022-11-29 | International Business Machines Corporation | Anomaly detection based on airflow measurement |
US11585557B2 (en) | 2020-07-01 | 2023-02-21 | International Business Machines Corporation | Anomaly detection based on airflow alerters |
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