DE102006038837B4 - Device, control device and method for detecting a collision - Google Patents
Device, control device and method for detecting a collision Download PDFInfo
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- DE102006038837B4 DE102006038837B4 DE102006038837.2A DE102006038837A DE102006038837B4 DE 102006038837 B4 DE102006038837 B4 DE 102006038837B4 DE 102006038837 A DE102006038837 A DE 102006038837A DE 102006038837 B4 DE102006038837 B4 DE 102006038837B4
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- 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
-
- 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
- B60R21/0136—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 actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
-
- 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
- B60R21/015—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 the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01512—Passenger detection systems
- B60R21/01516—Passenger detection systems using force or pressure sensing means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
- G01G19/4142—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling activation of safety devices, e.g. airbag systems
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- 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
- B60R2021/01122—Prevention of malfunction
- B60R2021/01184—Fault detection or diagnostic circuits
- B60R2021/0119—Plausibility check
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Air Bags (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
Vorrichtung zur Detektion einer Kollision mit einer Insassensensierung (IB), die ein das Gewicht eines Insassen repräsentierendes Signal erzeugt, dadurch gekennzeichnet, dass eine Auswerteschaltung (μC) vorgesehen ist, die in Abhängigkeit von einer zeitlichen Änderung des Signals die Kollision detektiert.Device for detecting a collision with an occupant sensor (IB), which generates a signal representing the weight of an occupant, characterized in that an evaluation circuit (.mu.C) is provided which detects the collision in dependence on a temporal change of the signal.
Description
Stand der TechnikState of the art
Die Erfindung betrifft eine Vorrichtung, ein Steuergerät und ein Verfahren zur Detektion einer Kollision nach der Gattung der unabhängigen Patentansprüche.The invention relates to a device, a control device and a method for detecting a collision according to the preamble of the independent claims.
Aus
Weiterer Stand der Technik ist aus der
Offenbarung der ErfindungDisclosure of the invention
Die erfindungsgemäße Vorrichtung zur Detektion einer Kollision bzw. das erfindungsgemäße Steuergerät bzw das erfindungsgemäße Verfahren zur Detektion einer Kollision mit den Merkmalen der unabhängigen Patentansprüche haben demgegenüber den Vorteil, dass eine solche Insassensensierung ein Signal liefert, das auch zur Detektion einer Kollision dient. Dabei wertet eine Auswerteschaltung, beispielsweise ein Mikrocontroller oder Mikroprozessor das Signal dahingehend aus, dass die zeitliche Änderung des Signals mithin seine zeitliche Ableitung zur Kollisionsdetektion verwendet wird.The inventive device for detecting a collision or the control device according to the invention or the inventive method for detecting a collision with the features of the independent claims have the advantage that such an occupant sensor provides a signal that also serves to detect a collision. In this case, an evaluation circuit, for example a microcontroller or microprocessor, evaluates the signal to the effect that the time change of the signal and thus its time derivative for collision detection is used.
Gewichtsmesssensoren messen die Kraft im Fahrzeug vertikal, also in z-Richtung. Bei einer Kollision kommt es zu einer Vorverlagerung eines Fahrzeuginsassen, was sich in einer Änderung des Kraftflusses ausdrückt. Diese Änderung wird erfindungsgemäß zur Kollisionsbestimmung ausgenutzt. Dabei kommen vorzugsweise absolut messende Sensoren zum Einsatz, die innerhalb der Sitzstruktur verbaut sind und nunmehr im Allgemeinen als iBolt bekannt sind. Der Aufbau eines solchen Kraftmesselements, das die Insassensensierung ausmacht, ergibt die Möglichkeit, die Kraft in z-Richtung zu erfassen. Momente um die x- bzw. y-Achse sowie die Kräfte in x- und y-Richtung werden kompensiert und unterdrückt. Üblicherweise können vier solche Kraftmesselemente pro Sitz verwendet werden. Für die Durchführung der Erfindung ist jedoch nur ein Sensor notwendig, um die zeitliche Änderung des Messsignals auszuwerten. Die Verwendung von zwei Kraftmessbolzen kann vorzugsweise zur Front- bzw. Heck-Crasherkennung verwendet werden.Weight measuring sensors measure the force in the vehicle vertically, ie in the z-direction. In a collision, there is a forward displacement of a vehicle occupant, which is expressed in a change in the power flow. This change is utilized according to the invention for collision determination. Preferably absolute measuring sensors are used, which are installed within the seat structure and are now generally known as iBolt. The construction of such a force measuring element, which constitutes the occupant sensing, gives the possibility of detecting the force in the z-direction. Moments about the x or y axis and the forces in the x and y directions are compensated and suppressed. Typically, four such force measuring elements per seat can be used. For the implementation of the invention, however, only one sensor is necessary to evaluate the temporal change of the measurement signal. The use of two force measuring pins can preferably be used for front or rear crash detection.
Eine durch einen Crash bzw. Kollision hervorgerufene Verzögerung führt aufgrund der Massenträgheit des Insassen zu einer Vorverlagerung. Diese Vorverlagerung kann über einen Kraftmessbolzen oder eine andere gewichtsmessende Sensorik erfasst werden. Das bedeutet physikalisch eine signifikante Änderung des von ihm gemessenen Signals, welches mit dem Gewicht korreliert. Diese Änderung lässt sich erfindungsgemäß als Plausibilisierung und/oder als Kollisionsdetektion in einem Algorithmus zur Auslösung von Personenschutzmitteln einsetzen.A caused by a crash or collision leads due to the inertia of the occupant to a forward displacement. This forward displacement can be detected by a force pin or other weight-measuring sensors. This means physically a significant change in the signal measured by it, which correlates with the weight. This change can be used according to the invention as a plausibility check and / or as collision detection in an algorithm for triggering personal protection devices.
Von Vorteil ist die Einsparung von Beschleunigungssensoren, denn es kann beispielsweise der Beschleunigungssensor eingespart werden, der in Heckrichtung empfindlich ist und der eine Plausibilisierung für den Heck-Crash bzw. auch für den Front-Crash darstellen soll. Die Einführung der Erfindung vermeidet so die Verzögerung des Insassen durch diese Plausibilisierung, denn die Erfassung der Kraftmessbolzen erfolgt in analoger Form. Damit kann durch die Einsparung von Sensoriken eine deutliche Reduktion der Hardwarekosten gegeben sein.An advantage is the saving of acceleration sensors, because it can, for example, the acceleration sensor can be saved, which is sensitive in the rear direction and should represent a plausibility of the rear crash or even for the front crash. The introduction of the invention thus avoids the delay of the occupant by this plausibility, because the detection of the force measuring pin takes place in an analogous form. This can be given by the saving of sensors a significant reduction in hardware costs.
Durch den Einsatz von vier Kraftmessbolzen kann mittels der vier Kraftmessbolzen eine deutlich bessere Plausibilisierung durchgeführt werden. Dadurch ergibt sich der Vorteil einer erhöhten Robustheit bei einer Auslösung der Personenschutzmittel.By using four force measuring pins, a much better plausibility check can be carried out by means of the four force measuring pins. This results in the advantage of increased robustness in triggering the personal protection.
Das erfindungsgemäße Steuergerät weist eine Schnittstelle auf, die die Signale beispielsweise des Kraftmessbolzens bereitstellt.The control unit according to the invention has an interface which provides the signals, for example, of the force measuring bolt.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen und Weiterbildungen sind vorteilhafte Verbesserungen der in den unabhängigen Patentansprüchen angegebenen Vorrichtung zur Detektion einer Kollision bzw. der in den unabhängigen Patentansprüchen angegebenen Verfahrens zur Detektion einer Kollision möglich.Advantageous improvements of the device specified in the independent patent claims for detecting a collision or the method for detecting a collision specified in the independent patent claims are possible by the measures and developments specified in the dependent claims.
Besonders vorteilhaft ist, dass die zeitliche Änderung des Signals einer Schwellwertentscheidung unterzogen wird und so in einfacher Art und Weise die Detektionsauswertung geschehen kann. Dieser Schwellwert kann fest oder variabel sein. Daneben lassen sich anstatt oder zusätzlich weitere zeitliche Änderungen des Signals auswerten. Dazu gehören mehrfache Ableitungen des Signals, Varianzen, Schwankungsbreiten etc.It is particularly advantageous that the temporal change of the signal is subjected to a threshold value decision and so the detection evaluation can be done in a simple manner. This threshold can be fixed or variable. In addition, additional temporal changes of the signal can be evaluated instead of or in addition. These include multiple derivatives of the signal, variances, fluctuation ranges, etc.
Es ist weiterhin von Vorteil, dass gezählt wird, wie lange die zeitliche Ableitung über dem Schwellwert ist, um so genannte Misuse-Fälle wie ein Schlagloch oder eine Bordsteinüberfahrt auszublenden, die lediglich zu einem kurzzeitigen Überschreiten eines Schwellwertes führen. Daher ist die zeitliche Bewertung des Signals notwenig, um solche Misuse-Fälle ausschließen zu können.It is also advantageous that it is counted how long the time derivative is above the threshold value in order to hide so-called misuse cases such as a pothole or a curb crossing, which merely lead to a short-term exceeding of a threshold value. Therefore, the temporal evaluation of the signal is necessary to exclude such misuse cases.
Vorteilhafterweise kann die Auswertung der zeitlichen Änderung des Signals zur Plausibilisierung eines Signals einer Crash-Sensorik verwendet werden. Dies erspart die Verwendung von einer zusätzlichen Crash-Sensorik. Advantageously, the evaluation of the temporal change of the signal can be used to check the plausibility of a crash sensor system. This saves the use of an additional crash sensor.
Darüber hinaus ist es von Vorteil, dass ein mechanischer Anschlag des Kraftmessbolzens, der als Überlastschutz genutzt wird, zur Kollisionsdetektion verwendet wird. Der Überlastschutz dient zur Sicherung des Sitzes bei einem Unfall. Auch dieser Anschlag kann vorzugsweise anhand der zeitlichen Änderung des Signals erkannt werden, indem bspw. ein Maximalwert erreicht wird. Auch die Form des Signals, die die zeitlichen Änderungen des Signals zeigt, kann im Sinne einer Mustererkennung zur Erkennung des Anschlags und damit zur Kollisionsdetektion verwendet werden.In addition, it is advantageous that a mechanical stop of the force measuring pin, which is used as overload protection, is used for collision detection. The overload protection serves to secure the seat in the event of an accident. This stop, too, can preferably be detected on the basis of the change over time of the signal by, for example, reaching a maximum value. The shape of the signal, which shows the temporal changes of the signal, can also be used in the sense of pattern recognition for detecting the attack and thus for collision detection.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description.
Es zeigenShow it
Erfindungsgemäß wertet der Mikrocontroller μC die zeitliche Änderung, sprich die zeitliche Ableitung des Signals von der Insassensensorik IB aus. Dieses Signal wird mit einem Schwellwert verglichen und wenn der Schwellwert überschritten wird, dann wird überprüft, wie lange dieser Schwellwert überschritten wird, um festzustellen, ob es sich um einem so genannten Misuse handelt oder um einen tatsächlichen Auslösefall. Darüber hinaus wird natürlich auch die Gewichtsinformation ausgewertet, um festzustellen, ob ein Airbag ausgelöst werden kann oder nicht. Darüber hinaus wertet der Mikrocontroller μC die Signale der Crash-Sensorik CS aus. Dafür werden die Sensorsignale auf bekannte Weise ausgewertet, wiederum mittels Kennlinien oder Schwellwerten. Neben der hier dargestellten ausgelagerten Sensorik ist es auch möglich, dass sich innerhalb des Steuergeräts SG1 eine Unfallsensorik befindet. Andere Komponenten, die zum Betrieb des Steuergeräts SG1 notwendig sind, aber für das Verständnis der Erfindung nicht, sind der Einfachheit halber vorliegend weggelassen worden. Die Daten von den Sesoriken CS bzw. IB werden über Punkt-zu-Punkt oder Bus-Verbindungen zum Steuergerät SG1 übertragen. Insbesondere für die Sensorik IB hat sich der bekannte LIN-Bus als vorteilhaft erwiesen.According to the invention, the microcontroller .mu.C evaluates the temporal change, ie the time derivative of the signal from the occupant sensor system IB. This signal is compared to a threshold and when the threshold is exceeded, it is checked how long this threshold is exceeded to determine if it is a so-called misuse or an actual triggering event. In addition, of course, the weight information is evaluated to determine whether an airbag can be triggered or not. In addition, the microcontroller μC evaluates the signals of the crash sensor system CS. For this purpose, the sensor signals are evaluated in a known manner, again by means of characteristic curves or threshold values. In addition to the outsourced sensor system shown here, it is also possible that an accident sensor system is located within the control unit SG1. Other components necessary for operation of the controller SG1 but not for the understanding of the invention have been omitted herein for the sake of simplicity. The data from the CS or IBs are transmitted to the controller SG1 via point-to-point or bus connections. In particular for the sensor system IB, the known LIN bus has proven to be advantageous.
Vorliegend wird eine Plausibilisierung mit dem Signal des Kraftmessbolzens bezüglich der Kollisionsdetektion durchgeführt. Es ist möglich, dass nur mit dem Kraftmessbolzen die Detektion der Kollision erfolgt. Anstatt von Beschleunigungssensoren können auch andere Sensoren wie Druck-, Körperschall- und Umfeldsensoren verwendet werden.In the present case, a plausibility check is carried out with the signal of the force measuring bolt with respect to the collision detection. It is possible that the collision is detected only with the force pin. Instead of acceleration sensors, other sensors such as pressure, structure-borne sound and environmental sensors can be used.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102006038837.2A DE102006038837B4 (en) | 2006-08-18 | 2006-08-18 | Device, control device and method for detecting a collision |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102006038837.2A DE102006038837B4 (en) | 2006-08-18 | 2006-08-18 | Device, control device and method for detecting a collision |
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DE102006038837A1 DE102006038837A1 (en) | 2008-02-21 |
DE102006038837B4 true DE102006038837B4 (en) | 2016-09-15 |
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DE102006038837.2A Expired - Fee Related DE102006038837B4 (en) | 2006-08-18 | 2006-08-18 | Device, control device and method for detecting a collision |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107463470A (en) * | 2016-06-03 | 2017-12-12 | 中芯国际集成电路制造(上海)有限公司 | Channel contention detection method and system |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102008001781A1 (en) | 2008-05-15 | 2009-11-19 | Robert Bosch Gmbh | Method and control device for controlling personal protective equipment for a vehicle |
DE102015203672B4 (en) | 2015-03-02 | 2023-05-17 | Bayerische Motoren Werke Aktiengesellschaft | Device, method and vehicle for improved detection of any mechanical vehicle damage and support for the driver |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10246055A1 (en) * | 2002-10-02 | 2004-04-15 | Robert Bosch Gmbh | Protection device for a vehicle occupant |
DE10333992A1 (en) * | 2003-05-07 | 2004-11-25 | Robert Bosch Gmbh | Force measurement element comprises two double bending beams that behave as springs and have a force applied essentially perpendicular to their longitudinal direction |
DE102005005257A1 (en) * | 2004-02-09 | 2005-08-25 | Denso Corp., Kariya | Control system for a system for protecting vehicle occupants |
DE102005004742A1 (en) * | 2005-02-02 | 2006-08-10 | Robert Bosch Gmbh | security system |
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2006
- 2006-08-18 DE DE102006038837.2A patent/DE102006038837B4/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10246055A1 (en) * | 2002-10-02 | 2004-04-15 | Robert Bosch Gmbh | Protection device for a vehicle occupant |
DE10333992A1 (en) * | 2003-05-07 | 2004-11-25 | Robert Bosch Gmbh | Force measurement element comprises two double bending beams that behave as springs and have a force applied essentially perpendicular to their longitudinal direction |
DE102005005257A1 (en) * | 2004-02-09 | 2005-08-25 | Denso Corp., Kariya | Control system for a system for protecting vehicle occupants |
DE102005004742A1 (en) * | 2005-02-02 | 2006-08-10 | Robert Bosch Gmbh | security system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107463470A (en) * | 2016-06-03 | 2017-12-12 | 中芯国际集成电路制造(上海)有限公司 | Channel contention detection method and system |
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