DE10245780B4 - Device for impact detection by means of structure-borne noise in a vehicle - Google Patents
Device for impact detection by means of structure-borne noise in a vehicle Download PDFInfo
- Publication number
- DE10245780B4 DE10245780B4 DE10245780A DE10245780A DE10245780B4 DE 10245780 B4 DE10245780 B4 DE 10245780B4 DE 10245780 A DE10245780 A DE 10245780A DE 10245780 A DE10245780 A DE 10245780A DE 10245780 B4 DE10245780 B4 DE 10245780B4
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- sound
- vehicle
- impact
- detector
- vibration sensor
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- 238000001514 detection method Methods 0.000 title claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 14
- 230000001133 acceleration Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 230000005236 sound signal Effects 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Air Bags (AREA)
Abstract
Vorrichtung zur Aufprallerkennung mittels Körperschall in einem Fahrzeug (1), wobei die Vorrichtung derart konfiguriert ist, dass die Vorrichtung mittels wenigstens eines Detektors (D1, D2, D3, D4) Körperschall beim Aufprall erzeugt, der zu wenigstens einem Schwingungssensor (S) zur Aufprallerkennung übertragen wird, dadurch gekennzeichnet, dass der wenigstens eine Detektor (D1, D2, D3 und D4) mit dem wenigstens einen Schwingungssensor (S) über wenigstens einen Schallleiter (2) verbunden ist.Device for detecting impact by means of structure-borne noise in a vehicle (1), the device being configured in such a way that the device generates structure-borne noise during impact by means of at least one detector (D1, D2, D3, D4), which belongs to at least one vibration sensor (S) for impact detection is transmitted, characterized in that the at least one detector (D1, D2, D3 and D4) with the at least one vibration sensor (S) via at least one sound conductor (2) is connected.
Description
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zur Aufprallerkennung mittels Körperschall in einem Fahrzeug nach der Gattung des unabhängigen Patentanspruchs.The The invention is based on a device for impact detection by means of structure-borne sound in a vehicle according to the preamble of the independent claim.
Die
Verwendung von Körperschall
zur Charakterisierung von einem Aufprall ist bereits bekannt. So
ist aus der
Aus
der
Nachteilig an solchen Körperschallsensoren ist, dass damit kein unmittelbarer Vorteil gegenüber dem ungefilterten Signal eines zentralen Beschleunigungssensors erzielt werden konnte. Die Zusatzinformation durch die Körperschallsignale ist also nicht ausreichend.adversely on such structure-borne sound sensors, that is not an immediate advantage over the unfiltered signal a central acceleration sensor could be achieved. The Additional information through the structure-borne sound signals is not enough.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Vorrichtung zur Aufprallerkennung mittels Körperschall in einem Fahrzeug mit den Merkmalen des unabhängigen Patentanspruchs hat demgegenüber den Vorteil, dass bei der erfindungsgemäßen Vorrichtung durch die verteilten Detektoren im Fahrzeug und einen Schwingungssensor, mit dem die Detektoren über Schallleiter verbunden sind, eine frühzeitige und ausführliche Crashanalyse möglich ist. Es liegt damit die Auswertung eines sogenannten Crashsounds vor. Diese Körperschallinformationen, die von den Detektoren erzeugt werden, liefern Informationen über ein sehr frühes Stadium des Crashes. Da die Schallleiter, die beispielsweise Festkörper sind eine hohe Schallgeschwindigkeit von ungefähr 5000 m/s aufweisen, ist eine schnelle Übertragung zu einem beispielsweise zentral angeordneten Schwingungssensor möglich. In diesem Signal über den Körperschall, den die Detektoren in Abhängigkeit von dem Aufprall erzeugen, sind interessante Informationen über den Aufprall beinhaltet. Dazu gehört beispielsweise die Abschätzung der effektiven Masse. Über den Impulssatz kann die effektive Masse unter Hinzunahme eines Signals von einem Aufprallsensor, vorzugsweise einem Precrashsensor, ermittelt werden. Beim Aufprall erfolgt ein Impulsübertrag auf das Fahrzeug und damit den Detektor. Es besteht damit ein Zusammenhang zwischen charakteristischen Eigenschaften (Frequenz und Amplitude) des erzeugten Schalls und/oder dem Impulsübertrag. Mit diesem Zusammenhang könnte in einem frühen Stadium des Unfalls eine Abschätzung des Impulsübertrags vorgenommen werden. Damit ist eine Voraussage der Schwere des Crashes möglich und damit eine verbesserte Ansteuerung der Rückhaltemittel. Mithin führt die erfindungsgemäße Vorrichtung zu einer angepassteren und sichereren Verwendung von Rückhaltemitteln und damit zu einem besseren Schutz für die Insassen. Das von den Detektoren erzeugte charakteristische Körperschallsignal kann auch zur Beurteilung des Crashtyps dienen. Beispielsweise kann damit auf einen Crash mit einer deformierbaren Barriere oder einer nicht deformierbaren Barriere geschlossen werden. Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen und Weiterbildungen sind vorteilhafte Verbesserungen der im unabhängigen Patentanspruch angegebenen Vorrichtung zur Aufprallerkennung mittels Körperschall in einem Fahrzeug möglich.The inventive device for impact detection by means of structure-borne noise in a vehicle having the features of the independent claim In contrast, the advantage that in the inventive device by the distributed Detectors in the vehicle and a vibration sensor with which the Detectors over Sound conductors are connected, an early and detailed crash analysis possible is. It is thus the evaluation of a so-called crash sound in front. This structure-borne noise information, generated by the detectors provide information about very early Stage of the crash. Because the sound conductors, which are solids, for example have a high sound velocity of about 5000 m / s, is one fast transmission for example, a centrally arranged vibration sensor possible. In this signal over the structure-borne sound, the detectors in dependence from the impact, are interesting information about the Impact includes. This includes for example, the estimate the effective mass. about The pulse rate can be the effective mass with the addition of a signal from a crash sensor, preferably a pre-crash sensor become. Upon impact, there is a momentum transfer to the vehicle and with it the detector. There is thus a connection between characteristic Properties (frequency and amplitude) of the generated sound and / or the momentum transfer. With this connection could in an early Stage of the accident an estimate of momentum transfer be made. This is a prediction of the severity of the crash possible and thus an improved control of the retaining means. Consequently, the leads inventive device for a more adapted and safer use of restraints and thus better protection for the occupants. That of the Detectors generated characteristic structure-borne sound signal can also to assess the crash type. For example, with it on a crash with a deformable barrier or not be closed deformable barrier. By the measures listed in the dependent claims and further developments are advantageous improvements of the independent claim specified device for impact detection by means of structure-borne noise possible in a vehicle.
Erfindungskennzeichnend ist, dass der wenigstens eine Detektor mit dem wenigstens einen Schwingungssensor über wenigstens einen Schallleiter verbunden ist. Diese Schallleiter sind entweder tragende Teile der Fahrzeugkonstruktion oder speziell dafür vorgesehene Schallleiter, die zum Beispiel aus Festkörpern bestehen und, wie oben dargestellt, eine Schallgeschwindigkeit der Longitudinalwellen von typischerweise einigen tausend m/s ermöglichen. Hier sind auch Flüssigkeiten als Schallleiter denkbar. Der Schwingungssensor kann zentral im Fahrzeug, beispielsweise im Bereich des Fahrzeugtunnels, angeordnet sein und ist vorzugsweise als Beschleunigungsaufnehmer ausgebildet. Als Beschleunigungsaufnehmer, insbesondere als ein elektronischer Beschleunigungssensor, ist er dabei für eine Bandbreite von bis zu 50 kHz und einer Abtastrate von 5 bis 10 μs ausgebildet.Characteristic feature of the invention is that the at least one detector is connected to the at least one vibration sensor via at least one sound conductor. These sound conductors are either supporting parts of the vehicle construction or specially provided sound conductors, which consist for example of solids and, as shown above, allow a speed of sound of the longitudinal waves of typically several thousand m / s. Here are also liquids as a sound conductor conceivable. The vibration sensor can be centrally located in Vehicle, for example in the area of the vehicle tunnel, be arranged and is preferably designed as an accelerometer. As an accelerometer, in particular as an electronic acceleration sensor, it is designed for a bandwidth of up to 50 kHz and a sampling rate of 5 to 10 microseconds.
Die Detektoren der erfindungsgemäßen Vorrichtung sind derart ausgebildet, dass sie den Schall nach dem Stimmgabelprinzip erzeugen. Solche Detektoren können beispielsweise mikromechanisch hergestellt sein, vorzugsweise aus Metall. Die Detektoren sind dabei im Fahrzeug verteilt angeordnet. Vorzugsweise ist jeweils einer an der Fahrzeugseite angebracht und im Bereich der Fahrzeugfront sollte wenigstens ein Detektor angeordnet sein. Die Verwendung von zwei Detektoren ist für die Lokalisierung des Aufprallpunkts von besonderem Vorteil.The Detectors of the device according to the invention are designed so that they sound according to the tuning fork principle produce. Such detectors can For example, be made micromechanically, preferably from Metal. The detectors are distributed in the vehicle. Preferably each one is attached to the side of the vehicle and in the area At least one detector should be arranged at the front of the vehicle. The use of two detectors is for the localization of the impact point of particular advantage.
Zeichnungdrawing
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden in der nachfolgenden Beschreibung näher erläutert.embodiments The invention are illustrated in the drawings and in the following description explained.
Es
zeigen
Beschreibungdescription
Zur frühen Charakterisierung von Aufprallvorgängen an Kraftfahrzeugen werden zur Zeit beispielsweise sogenannte Upfront-Sensoren verwendet, deren Beschleunigungsdaten insbesondere bei schweren Frontalcrashs deutlich früher eine Erkennung des Unfalls zulassen als ein Beschleunigungssensor im zentralen Steuergerät. Diese liefern nämlich aufgrund der Verformung der Fahrzeugfront erst deutlich später höhere Beschleunigungswerte.to early Characterization of impacts on motor vehicles currently used, for example, so-called upfront sensors whose Acceleration data especially in severe frontal crashes clearly earlier allow detection of the accident as an acceleration sensor in the central control unit. These deliver namely due to the deformation of the vehicle front only much later higher acceleration values.
Es wurde versucht, mit Körperschallsensoren, vor allem bei Seitencrashes, eine frühere Detektion des Aufpralls zu ermöglichen. Dies ist besonders wichtig, da gerade bei einem Seitencrash die Deformationszone besonders klein ist und entsprechend die Auslösezeiten für Rückhaltesysteme, beispielsweise Seitenairbags, extrem kurz sind. Mit speziellen Körperschallsensoren konnte jedoch kein unmittelbarer Vorteil gegenüber dem ungefiltertem Signal des zentralen Beschleunigungssensors erzielt werden.It was tried with structure-borne sound sensors, especially in side crashes, an earlier detection of the impact to enable. This is especially important, since the side crash Deformation zone is particularly small and accordingly the tripping times for restraint systems, For example, side airbags are extremely short. With special structure-borne sound sensors however, could not have an immediate advantage over the unfiltered signal of the central acceleration sensor.
Erfindungsgemäß wird nun eine Vorrichtung vorgeschlagen, die im Fahrzeug verteilte Detektoren aufweist, die in Abhängigkeit von einem Aufprall Schall erzeugen, der über Schallleiter zu wenigstens einem zentralen Schwingungssensor übertragen wird. Die Übertragung dieses sogenannten Crashsounds, der direkt in unmittelbarer Nähe vom Aufprallort erzeugt wird, geht über die Schallleiter, also beispielsweise tragende Teile der Karosserie, sehr schnell vonstatten, wobei bei einer Schallgeschwindigkeit von 5000 m/s innerhalb von Bruchteilen einer ms eine Übertragung zu einem zentral angeordneten Schwingungssensor möglich ist. Aus diesem Crashsound kann durch Signalauswertung eine sehr frühzeitige Analyse des Aufpralls durchgeführt werden. Wie oben dargestellt, kann daraus unter Zuhilfenahme der Relativgeschwindigkeit zwischen dem Fahrzeug und dem Aufprallobjekt eine Schätzung der effektiven Masse des Aufprallobjekts durchgeführt werden und damit eine Vorhersage über die Unfallschwere. Ist eine Vorhersage über die Unfallschwere möglich, dann können die Rückhaltemittel angepasst aktiviert werden und so der Schutz der Insassen verbessert werden. Durch Anordnung von mehreren Detektoren kann beispielsweise durch Verwendung verschiedener Frequenzen des erzeugten Schalls eine Zuordnung zum Aufprallort vorgenommen werden. Damit ist dann eine Richtungsbestimmung möglich. Dies ersetzt beispielsweise Beschleunigungssensoren, die in verschiedenen Richtungen angeordnet sind.According to the invention will now proposed a device having detectors distributed in the vehicle, the dependent from a collision generate sound, the sound conductor to at least one central vibration sensor is transmitted. The transfer This so-called crash sound, which is right in the immediate vicinity of the impact site is generated, goes over the sound conductors, so for example supporting parts of the body, very fast, taking at a speed of sound of 5000 m / s within fractions of a ms transmission to a centrally arranged vibration sensor is possible. From this crash sound can be very early by signal evaluation Analysis of the impact performed become. As shown above, it can with the help of the Relative speed between the vehicle and the impact object an estimate the effective mass of the impact object and thus a prediction about the accident severity. If a prediction of the severity of the accident is possible, then can the retention means be activated and thus improves the protection of the occupants become. By arranging a plurality of detectors, for example by using different frequencies of the generated sound an assignment to the impact location be made. This is then a direction determination possible. This For example, it replaces acceleration sensors that come in different Directions are arranged.
Die Detektoren D1, D2, D3 und D4 sind hier nach dem Stimmgabelprinzip ausgebildet. Es ist jedoch möglich, dass die Detektoren D1, D2, D3 und D4 auch nach anderen Prinzipien gefertigt werden, die die Erzeugung von Schall ermöglichen. Es ist auch möglich, hier elektronische Aktoren zu verwenden.The Detectors D1, D2, D3 and D4 are here according to the tuning fork principle educated. It is possible, however, that the detectors D1, D2, D3 and D4 also according to other principles be manufactured, which allow the generation of sound. It is also possible, here to use electronic actuators.
Der
Schwingungssensor S, der Prozessor
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10245780A DE10245780B4 (en) | 2002-10-01 | 2002-10-01 | Device for impact detection by means of structure-borne noise in a vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10245780A DE10245780B4 (en) | 2002-10-01 | 2002-10-01 | Device for impact detection by means of structure-borne noise in a vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE10245780A1 DE10245780A1 (en) | 2004-04-15 |
| DE10245780B4 true DE10245780B4 (en) | 2010-10-14 |
Family
ID=32010044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE10245780A Expired - Lifetime DE10245780B4 (en) | 2002-10-01 | 2002-10-01 | Device for impact detection by means of structure-borne noise in a vehicle |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE10245780B4 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004008600B4 (en) * | 2004-02-21 | 2015-07-16 | Conti Temic Microelectronic Gmbh | A method of deploying an occupant protection system and occupant protection system for a vehicle |
| DE112005000270D2 (en) | 2004-03-26 | 2006-10-12 | Conti Temic Microelectronic | Vehicle sensor for the detection of structure-borne noise |
| DE102004022822A1 (en) * | 2004-05-08 | 2005-12-01 | Conti Temic Microelectronic Gmbh | Motor vehicle sensor, for detecting impact sound, has measured-value sensor for detecting impact sound together with sensing elements coupled to vehicle's structure |
| DE102004022830A1 (en) * | 2004-05-08 | 2005-12-01 | Conti Temic Microelectronic Gmbh | Sensor system/trigger sensor, suitable for diagnostic safety device, especially accident protection device for motor vehicle, has elastic coupling coating/viscoelastic coupling coating for acoustic wave coupling |
| DE102004022831A1 (en) * | 2004-05-08 | 2005-12-01 | Conti Temic Microelectronic Gmbh | Sensor system / trigger sensor, suitable for diagnostic / safety device, in particular for accident prevention devices in a vehicle |
| DE102004031557B4 (en) * | 2004-06-29 | 2016-12-22 | Conti Temic Microelectronic Gmbh | Method and crash sensor for a device for occupant-relevant activation of occupant protection devices in a motor vehicle in crash cases |
| DE102004038984A1 (en) * | 2004-08-10 | 2006-02-23 | Robert Bosch Gmbh | Device for crash detection |
| DE102004049380B4 (en) * | 2004-10-09 | 2017-02-02 | Conti Temic Microelectronic Gmbh | vehicle sensor |
| DE102005006763A1 (en) * | 2005-02-15 | 2006-08-24 | Robert Bosch Gmbh | Method and device for object recognition |
| DE102005014013A1 (en) * | 2005-03-26 | 2006-09-28 | Conti Temic Microelectronic Gmbh | Vehicle sensor for e.g. passenger protection system of automobile, has measurement sensor with different direction-dependant sensing characteristics that are predetermined by its geometrical form and polarizations of piezoelectric material |
| DE102005034589A1 (en) * | 2005-07-25 | 2007-02-01 | Conti Temic Microelectronic Gmbh | Mechanical vibration e.g. structure-borne noise, detection device for vehicle, has evaluation device evaluating vibrations detected by sensor device, and frequency detection device determining frequency parameters of vibrations |
| JP2007050855A (en) * | 2005-08-19 | 2007-03-01 | Denso Corp | Pedestrian collision detection device |
| DE102007045927B4 (en) * | 2006-12-20 | 2020-03-05 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Sound transmission device |
| DE102007027492A1 (en) * | 2007-06-14 | 2008-12-18 | Robert Bosch Gmbh | Method and control device for controlling personal protective equipment for a vehicle |
| DE102008020186B4 (en) | 2008-04-22 | 2010-01-07 | Audi Ag | Device for detecting the characteristic of an impact on a motor vehicle |
| DE102008040590A1 (en) * | 2008-07-22 | 2010-01-28 | Robert Bosch Gmbh | Method and control device for controlling personal protective equipment for a vehicle |
| DE102009038430A1 (en) * | 2009-05-06 | 2010-11-11 | Continental Automotive Gmbh | Method for impact detection in motor vehicles with at least one body sound generating device |
| DE102009042781A1 (en) * | 2009-09-25 | 2011-03-31 | Benteler Automobiltechnik Gmbh | Device for producing structure-borne sound vibration in event of impact of collision object with motor vehicle, has excitation elements causing mechanical excitation of mechanically vibrating elements |
| EP2480433B1 (en) | 2009-09-25 | 2013-06-12 | Continental Automotive GmbH | Device for generating structure-borne vibration in case of a collision between an object and a vehicle. |
| DE102012021214B4 (en) | 2012-10-27 | 2022-02-24 | Volkswagen Aktiengesellschaft | Device for impact detection using structure-borne noise |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3729019A1 (en) * | 1987-08-31 | 1989-03-16 | Messerschmitt Boelkow Blohm | DEVICE FOR RELEASING A SAFETY DEVICE |
| DE19855452A1 (en) * | 1998-12-01 | 2000-06-15 | Siemens Ag | Device for controlling an occupant protection device of a vehicle |
| DE10034524A1 (en) * | 2000-07-15 | 2002-01-24 | Volkswagen Ag | Detecting accident-related vehicle component deformation involves repeatedly stimulating with defined frequency pulse, detecting change in resulting sound frequency spectrum |
| DE10058986A1 (en) * | 2000-11-28 | 2002-06-06 | Siemens Ag | Impact sound sensor device for use in a motor vehicle has an oscillating weight to operate with a piezo element and a printed circuit board. |
-
2002
- 2002-10-01 DE DE10245780A patent/DE10245780B4/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3729019A1 (en) * | 1987-08-31 | 1989-03-16 | Messerschmitt Boelkow Blohm | DEVICE FOR RELEASING A SAFETY DEVICE |
| DE19855452A1 (en) * | 1998-12-01 | 2000-06-15 | Siemens Ag | Device for controlling an occupant protection device of a vehicle |
| DE10034524A1 (en) * | 2000-07-15 | 2002-01-24 | Volkswagen Ag | Detecting accident-related vehicle component deformation involves repeatedly stimulating with defined frequency pulse, detecting change in resulting sound frequency spectrum |
| DE10058986A1 (en) * | 2000-11-28 | 2002-06-06 | Siemens Ag | Impact sound sensor device for use in a motor vehicle has an oscillating weight to operate with a piezo element and a printed circuit board. |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10245780A1 (en) | 2004-04-15 |
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| R084 | Declaration of willingness to licence | ||
| R071 | Expiry of right |