DE3608525C2 - - Google Patents
Info
- Publication number
- DE3608525C2 DE3608525C2 DE3608525A DE3608525A DE3608525C2 DE 3608525 C2 DE3608525 C2 DE 3608525C2 DE 3608525 A DE3608525 A DE 3608525A DE 3608525 A DE3608525 A DE 3608525A DE 3608525 C2 DE3608525 C2 DE 3608525C2
- Authority
- DE
- Germany
- Prior art keywords
- signals
- sensor
- deviations
- motor
- generated
- 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.)
- Expired
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Testing Of Engines (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Überprüfung eines Kraftfahrzeugsicherheitssystems gemäß dem Oberbe griff des Anspruchs 1.The invention relates to a method for checking of a motor vehicle security system according to the Oberbe handle of claim 1.
Ein derartiges Kraftfahrzeugsicherheitssystem ist bei spielsweise ein Aufprallschutzkissen (sogenannter "Air bag"), das bei einem Unfall aufgeblasen wird und als weiches Polster den nach vorne geschleuderten Oberkörper des Fahrers, oder ggf. auch eines Beifahrers, auffängt. Die Auslösung dieses Aufprallschutzkissens geschieht durch Sensoren, die bei den starken Verzögerungen, wie sie bei einem Unfall typischerweise auftreten, das Akti vierungssystem einschalten.Such a motor vehicle security system is part of for example an impact protection cushion (so-called "Air bag "), which is inflated in an accident and called soft padding the forward thrown upper body of the driver, or possibly a passenger. This impact protection cushion is triggered through sensors that like the strong delays they typically occur in an accident, the Akti Switch on the identification system.
Es sind bereits Schaltungen bekannt, die die Funktions fähigkeit der Auslöseschaltung überprüfen, denn die Überprüfung dieses sicherheitsrelevanten Teils ist zur Sicherstellung der ständigen Bereitschaft notwendig.Circuits are already known that function Check the ability of the trigger circuit, because the This safety-relevant part is to be checked Ensuring constant readiness is necessary.
Es kann jedoch zu einem Fehlverhalten des Aufprall schutzsystems kommen, wenn der Sensor defekt ist. In diesem Falle besteht die Möglichkeit, daß das Aufprall schutzsystem bei einem Unfall nicht oder andererseits dann ausgelöst wird, wenn keine für den Insassen gefähr liche Situation vorliegt.However, it can cause misconduct of the impact protection system come when the sensor is defective. In in this case there is a possibility that the impact protection system in the event of an accident or not is triggered when none is dangerous for the occupant situation.
Aus der US-PS 43 81 829 ist es bekannt, mittels Sensoren eine Sicherheitseinrichtung wie beispielsweise eine auf blasbare Aufprallschutzvorrichtung bei dem Auftreten einer einen Grenzwert übersteigenden Beschleunigung zu aktivieren, während die unterhalb dieses Grenzwertes auftretenden, im Fahrbetrieb entstehenden Beschleunigun gen und Verzögerungen sowie Vibrationen zur Überprüfung der Funktionsfähigkeit der Sensoren herangezogen werden. Dabei werden jedoch die verschiedenen Betriebszustände eines Fahrzeuges nicht genügend berücksichtigt.From US-PS 43 81 829 it is known by means of sensors a safety device such as one blowable impact protection device upon occurrence acceleration exceeding a limit activate while below that limit acceleration occurring during driving conditions and delays as well as vibrations for checking the functionality of the sensors. However, the different operating states of a vehicle is not sufficiently taken into account.
Aufgabe der Erfindung ist es, die Genauigkeit bei der Überprüfung der Funktionsfähigkeit der Sensoren zu erhö hen.The object of the invention is to ensure the accuracy of Check the functionality of the sensors hen.
Die Aufgabe wird gelöst durch die Merkmale des Patentan spruches 1.The object is achieved by the features of the patent saying 1.
Die während des Betriebes durch die Brennkraftmaschine erzeugten Vibrationen lassen sich zur Funktionsfähig keitsabfrage des Sensors verwenden. Dabei wird erfin dungsgemäß das von dem Sensor abgegebene Signal, das von den Vibrationen des Motors herrührt, in Relation gesetzt zu dem entsprechenden Drehzahlsignal, da die Beschleuni gungswerte, also die Amplituden und die Auslenkgeschwin digkeiten, von der Drehzahl abhängig sind. Somit läßt sich feststellen, ob das von dem Sensor abgegebene Signal innerhalb des zu erwartenden Bereiches liegt.The during operation by the internal combustion engine Vibrations generated can be functional Use the interrogation of the sensor. It is invented In accordance with the signal emitted by the sensor, the is due to the vibrations of the engine to the corresponding speed signal, since the acceler supply values, i.e. the amplitudes and the deflection speed depending on the speed. Thus leaves determine whether the output from the sensor Signal is within the expected range.
Gemäß einer bevorzugten Ausführung werden der Anlaßvor gang der Brennkraftmaschine und die damit verbundenen niederfrequenten Erschütterungen verwendet, um die dabei in der Karosserie auftretenden Vibrationen und Beschleu nigungen zu erfassen. Es wird also während des Anlaßvor ganges eine Plausibilitätsabfrage des Sensorsignales veranlaßt, um festzustellen, ob die mit dem Anlaßvorgang verbundenen Karosseriebeschleunigungen durch den Sensor erfaßt werden. Bleibt das erwartete Sensorsignal aus, liegt ein Defekt des Sensors vor, was zu einer entspre chenden Anzeige führt.According to a preferred embodiment, the occasion gear of the internal combustion engine and the associated low-frequency vibrations used to do this Vibrations and acceleration occurring in the body inclinations. So it will be during the event a plausibility check of the sensor signal prompted to determine whether the one with the starting process connected body accelerations through the sensor be recorded. If the expected sensor signal is missing, there is a defect in the sensor, which corresponds to a appropriate display.
Bei einer Sensor-Funktionsprüfung unter Verwendung der Motorvibrationen kann das Signal nicht nur hinsichtlich seiner Größe, sondern auch hinsichtlich seines zeitli chen Abstandes oder seiner Frequenz einer Auswertung zugeführt werden. Tritt das vom Sensor abgegebene Be schleunigungssignal nicht in der erwarteten Häufigkeit auf, weist auch dies auf einen Defekt im Sensor hin.For a sensor function test using the Engine vibrations can not only affect the signal its size, but also in terms of its time Chen distance or its frequency of an evaluation are fed. If the Be emitted by the sensor acceleration signal not in the expected frequency , this also indicates a defect in the sensor.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863608525 DE3608525A1 (en) | 1986-03-14 | 1986-03-14 | Method for testing a motor vehicle safety system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863608525 DE3608525A1 (en) | 1986-03-14 | 1986-03-14 | Method for testing a motor vehicle safety system |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3608525A1 DE3608525A1 (en) | 1987-09-17 |
DE3608525C2 true DE3608525C2 (en) | 1989-08-31 |
Family
ID=6296346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19863608525 Granted DE3608525A1 (en) | 1986-03-14 | 1986-03-14 | Method for testing a motor vehicle safety system |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3608525A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3706765C3 (en) * | 1987-03-03 | 1995-11-09 | Telefunken Microelectron | Impact sensor for a vehicle, with a test circuit |
DE3733832A1 (en) * | 1987-10-07 | 1989-04-27 | Messerschmitt Boelkow Blohm | SENSOR FOR MOTOR VEHICLES |
DE19608393A1 (en) * | 1996-03-05 | 1997-09-11 | Telefunken Microelectron | Tripping circuit, in particular for a safety-critical occupant protection system for vehicles for the transportation of people |
DE10134331C1 (en) | 2001-07-14 | 2002-10-10 | Bosch Gmbh Robert | Controlling triggering of passive safety system involves detecting impact speed from time difference between start of impact, transition of acceleration from low to higher acceleration |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2467740A1 (en) * | 1979-10-23 | 1981-04-30 | Renault | SYSTEM FOR DETECTING COLLISIONS AND CONTROLLING A SAFETY DEVICE |
-
1986
- 1986-03-14 DE DE19863608525 patent/DE3608525A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
DE3608525A1 (en) | 1987-09-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |