EP2201534A1 - Motor vehicle control system - Google Patents

Motor vehicle control system

Info

Publication number
EP2201534A1
EP2201534A1 EP08774004A EP08774004A EP2201534A1 EP 2201534 A1 EP2201534 A1 EP 2201534A1 EP 08774004 A EP08774004 A EP 08774004A EP 08774004 A EP08774004 A EP 08774004A EP 2201534 A1 EP2201534 A1 EP 2201534A1
Authority
EP
European Patent Office
Prior art keywords
motor vehicle
vehicle
distance
data
sensor
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.)
Ceased
Application number
EP08774004A
Other languages
German (de)
French (fr)
Inventor
Karsten Breuer
Thomas Dieckmann
Hartmut Kitterer
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.)
ZF CV Systems Hannover GmbH
Original Assignee
Wabco GmbH
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 Wabco GmbH filed Critical Wabco GmbH
Publication of EP2201534A1 publication Critical patent/EP2201534A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0841—Registering performance data
    • G07C5/0875—Registering performance data using magnetic data carriers
    • G07C5/0891—Video recorder in combination with video camera
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/167—Driving aids for lane monitoring, lane changing, e.g. blind spot detection

Definitions

  • the invention relates to a vehicle control system for a motor vehicle, comprising at least one driving data sensor for detecting driving data characterizing a driving state of the motor vehicle, at least one camera for detecting surrounding images, an accident data recorder which is set up for buffered recording of the surrounding images, and an electric control for controlling the vehicle Driving data sensor, camera and accident data recorder.
  • the invention relates to a method of operating a motor vehicle comprising the steps of: (a) acquiring driving data, (b) acquiring surrounding images, and (c) buffering the environmental images in an accident data recorder.
  • Such a system is known from DE 199 01 200 A1 and serves to store image data in the event of an accident for the purpose of proof.
  • a disadvantage of the system described therein is that it can be used exclusively for securing evidence.
  • Driver assistance systems serve to reduce the severity of the accident by autonomous partial braking of a motor vehicle, for example a commercial vehicle, shortly before the collision, or to reduce the severity of the accident by autonomous full braking when there is no longer possible avoidance of an obstacle or to completely avoid an accident.
  • a distance sensor is provided as the driving data sensor, for example, which determines a distance to a vehicle in front.
  • Driver assistance systems also often include a camera associated with a lane departure warning system.
  • the camera has a field of view that includes the area in which lane markings of a roadway are visible during normal operation of the motor vehicle.
  • the lane departure warning system detects whether the car leaves its lane and warns the driver if necessary.
  • the invention has for its object to overcome disadvantages in the prior art.
  • the invention solves the problem by a generic vehicle control system in which the electrical control is designed to be in the presence of predetermined driving data and / or environment images to trigger an autonomous braking of the motor vehicle.
  • the invention solves the problem by a generic method comprising the step of verifying whether predetermined driving data and / or environmental images are present in order to initiate autonomous braking of the motor vehicle if so required.
  • An advantage of the invention is that the camera can deliver both images for the accident data recorder as well as for a driver assistance system, such as a lane keeping or a brake assist system that avoids accidents or their consequences thereby reduces that it autonomously, ie without intervention of the vehicle Driver, decelerates.
  • a driver assistance system such as a lane keeping or a brake assist system that avoids accidents or their consequences thereby reduces that it autonomously, ie without intervention of the vehicle Driver, decelerates.
  • the electrical control may also be part of the driver assistance system, whereby the synergy effect is enhanced.
  • the camera is a tracking camera, which is designed to detect a lane marking during operation of the motor vehicle. It is thus advantageously achieved a particularly large synergy, since an additional camera for the lane keeping assistance system is unnecessary.
  • the vehicle control system further comprises a reversing camera for taking back images, wherein the accident data recorder is set up for buffered recording of the reversing images.
  • the accident data recorder is set up for buffered recording of the reversing images.
  • a distance sensor which is designed to acquire distance data of a distance to a vehicle in front is arranged on the motor vehicle and that the accident data recorder is arranged to buffer-record the distance data.
  • the electrical control is designed to detect distance and yaw rate sensor data as driving data.
  • the distance and yaw rate sensor data are considered in the evaluation as to whether autonomous braking is to be performed. This results in a synergy, since the distance and yaw rate sensor must be provided only once.
  • the vehicle control system may also include a distance detection camera, which is arranged so that a distance and a relative speed to a vehicle in front can be determined from the images taken by it.
  • the distance detection camera is arranged such that a rear of the vehicle in front is in its field of vision.
  • the vehicle control system also particularly preferably comprises an acceleration sensor and / or a yaw rate sensor and / or a steering angle sensor, wherein the accident data recorder is set up to also record data that is incoming from these sensors in buffered form. All incoming data is recorded in such a way that they can be reconstructed in their time sequence.
  • the electrical control is in turn designed to detect acceleration sensor data and / or yaw rate sensor data and / or steering angle sensor as driving data and to decide on the basis of this data whether an autonomous braking should be performed.
  • the accident data recorder is designed to store 0.1 to 100 images per second. It is also possible to compress the images before saving in order to save storage space. Suitable compression methods are known in the art.
  • the vehicle control system is equipped with
  • a lane departure warning system that includes a tracking camera configured to detect a lane mark of a traffic lane during operation of the motor vehicle, and an electrical assistance system controller configured to output a lane departure signal when the vehicles leave the traffic lane in operation; includes and / or
  • a distance assist system (B) a distance assist system, the - a distance sensor for detecting a distance of the motor vehicle to a preceding vehicle and an electrical distance assistance controller, which is adapted for outputting a distance signal, when in operation of the car falls below a predetermined minimum distance to the vehicle in front or in a collision critical situation occurs, in which the driver must apply a predetermined braking deceleration, to prevent an impact on the vehicle in front, and (c) an emergency braking system comprising an electric emergency braking system control arranged to autonomously brake the motor vehicle, wherein
  • the electric emergency brake system control is connected to the tracking camera and the distance sensor, so that they allow a redundant detection of the vehicle ahead.
  • the images supplied by the specified cameras can therefore be used on the one hand for an assistance system and, moreover, stored buffered in the accident data memory.
  • the information from environmental sensors provided for the accident data recorder or an automatic driver assistance system (ACC) is advantageously used to calculate the information for the environment Emergency braking function to represent necessary redundancy.
  • the electrical control is designed to generate on the one hand from the recorded images data on tracking and track radius and on the other hand to provide data on the position of lateral objects and their width.
  • the electrical control is also designed to combine the data thus obtained with existing, unchanged data from driving sensors of the driver assistance system so as to obtain redundantly secured, refined object data for the emergency braking system.
  • FIG. 1 shows a motor vehicle according to the invention.
  • the lane 12 includes a lane marker in the form of a lane marker 14 and a lane boundary marker 16.
  • the motor vehicle 10 has a driving data sensor 20 in the form of a distance sensor, which determines a distance A and a relative speed DV to a vehicle 22 traveling in front.
  • the motor vehicle 10 has in the center of a vehicle front, preferably arranged on the windshield, a tracking camera 24 which detects the lane marker 14 and the Fahrstrei- fenbegrenzungsmark ist 16 in a lane keeping camera field of view G.
  • the tracking camera 24 is arranged so that the lane keeping camera field of view G also at least partially detects the preceding vehicle 22.
  • the lane keeping camera 24 and the driving data sensor 20 are connected to an electric controller 26.
  • the electric controller 26 evaluates incoming images from the tracking camera 24 at a frequency of 10 to 50 frames per second and determines, via a programmed algorithm, whether the motor vehicle 10 is approaching or crossing the lane boundary marker 16 in an improper manner. If so, a lane departure warning signal is issued to a driver of the motor vehicle 10 who warns the driver. If a situation is detected by the electric control 26, which leads to an accident with a threshold above a predetermined threshold, then activates the electric control 26 wheel brakes of the vehicle 10 and brakes so without further action of the driver to avert the impending accident or to reduce its consequences.
  • the driving data sensor 20 detects at regular intervals the distance A and the relative speed DV to the vehicle in front 22 and sends this measurement data also to the electric controller 26. Due to the movement of the own motor vehicle 10 and the distance and relative speed data of the preceding vehicle 22 a collision critical situation detected, the electrical control 26 also emits a warning signal to the driver. Such a critical situation can be provided, for example, when the delay to be provided by the driver after his anticipated reaction time exceeds a predetermined threshold.
  • the electric controller 26 writes all or a predetermined selection of the data coming from the driving data sensor 20 or the tracking camera 26 into an accident data recorder 28. Thus, it is possible that each incoming measured value is stored in the accident data writing 28. However, it is possible that every nth measured value, for example every fifth or tenth, is stored.
  • the accident data recorder 28 records the incoming measurement data buffered, which means that measurement data which are older than a predetermined derivative time T, which depends on the storage capacity of the accident data recorder and is for example 20 seconds, are automatically deleted. In an accident of the motor vehicle 10, which is detected for example by a deceleration sensor 29, no data is deleted. The accident history can then be reconstructed from the data previously recorded in the accident data recorder 28.
  • the motor vehicle 10 also has a rear view camera 30, which has a reversing camera field of view R.
  • the reversing camera 30 is also connected to the electric control 26 or directly to the accident data recorder 28.
  • the motor vehicle 10 also has a yaw rate sensor 32 and / or a steering angle sensor 34, which are also in communication with the electrical control 26 and whose data are also recorded by the accident data recorder 28.
  • the steering angle sensor 34 detects a steering angle of a not shown steering wheel.

Abstract

The invention relates to a control system for a motor vehicle (10), comprising: (a) at least one driving data sensor (20) for acquiring driving data characterizing a driving state of the motor vehicle; (b) at least one camera (24, 30) for capturing images of the surroundings; (c) an accident recorder (28) that is designed to record the images of the surroundings in a buffer; and (d) an electric controller (26) for controlling the driving data sensor (20), the camera (24, 30), and the accident recorder (28). According to the invention, the electric controller (26) is designed to trigger an autonomous braking action of the motor vehicle (10) when predetermined driving data and/or images of the surroundings are provided.

Description

Fahrzeugsteuersystem für einen Kraftwagen Vehicle control system for a motor vehicle
Die Erfindung betrifft ein Fahrzeugsteuersystem für einen Kraftwagen, mit mindestens einem Fahrdatensensor zum Erfassen von einen Fahrzustand des Kraftwagen charakterisierenden Fahrdaten, mindestens einer Kamera zum Erfassen von Umfeldbildern, einem Unfalldatenschreiber, der eingerichtet ist zum gepufferten Aufzeichnen der Umfeldbilder, und einer elektrischen Steuerung zum Steuern des Fahrdatensensors, der Kamera und des Unfalldatenschreibers. Gemäß einem zweiten Aspekt betrifft die Erfindung ein Verfahren zum Betreiben eines Kraftwagens mit den folgenden Schritten: (a) Erfassen von Fahrdaten, (b) Erfassen von Umfeldbildern und (c) gepuffertes Aufzeichnen der Umfeldbilder in einem Unfalldatenschreiber.The invention relates to a vehicle control system for a motor vehicle, comprising at least one driving data sensor for detecting driving data characterizing a driving state of the motor vehicle, at least one camera for detecting surrounding images, an accident data recorder which is set up for buffered recording of the surrounding images, and an electric control for controlling the vehicle Driving data sensor, camera and accident data recorder. In a second aspect, the invention relates to a method of operating a motor vehicle comprising the steps of: (a) acquiring driving data, (b) acquiring surrounding images, and (c) buffering the environmental images in an accident data recorder.
Ein solches System ist aus der DE 199 01 200 A1 bekannt und dient dazu, Bilddaten für den Fall eines Unfalls zu Beweiszwecken zu speichern. Nachteilig an dem dort beschriebenen System ist, dass es ausschließlich zur Beweissicherung einsetzbar ist.Such a system is known from DE 199 01 200 A1 and serves to store image data in the event of an accident for the purpose of proof. A disadvantage of the system described therein is that it can be used exclusively for securing evidence.
Es ist zudem bekannt, in Kraftwagen Fahrerassistenzsysteme einzubauen. Fahrerassistenzsysteme dienen dazu, durch eine autonome Teil-Bremsung eines Kraftwagens, beispielsweise eines Nutzfahrzeugs, kurz vor der Kollision die Unfallschwere zu vermindern oder durch autonome Vollbremsung bei nicht mehr möglichem Ausweichen vor einem Hindernis die Unfallschwere zu vermindern oder einen Unfall vollständig zu vermeiden. Dazu wird als Fahrdatensensor beispielsweise ein Abstandssensor vorgesehen, der einen Abstand zu einem vorausfahrenden Fahrzeug ermittelt.It is also known to install driver assistance systems in motor vehicles. Driver assistance systems serve to reduce the severity of the accident by autonomous partial braking of a motor vehicle, for example a commercial vehicle, shortly before the collision, or to reduce the severity of the accident by autonomous full braking when there is no longer possible avoidance of an obstacle or to completely avoid an accident. For this purpose, a distance sensor is provided as the driving data sensor, for example, which determines a distance to a vehicle in front.
Fahrerassistenzsysteme umfassen zudem häufig eine Kamera, die einem Spurhalteassistenten zugeordnet ist. Die Kamera besitzt ein Blickfeld, das den Bereich umfasst, in dem beim normalen Betrieb des Kraftwagens Fahrspurmarkierungen einer Fahrbahn sichtbar sind. LJ- ber eine Bildauswertesoftware erkennt der Spurhalteassistent, ob der Kraftwagen seine Spur verlässt und warnt den Fahrer gegebenenfalls.Driver assistance systems also often include a camera associated with a lane departure warning system. The camera has a field of view that includes the area in which lane markings of a roadway are visible during normal operation of the motor vehicle. Via an image evaluation software, the lane departure warning system detects whether the car leaves its lane and warns the driver if necessary.
Der Erfindung liegt die Aufgabe zugrunde, Nachteile im Stand der Technik zu überwinden. Die Erfindung löst das Problem durch ein gattungsgemäßes Fahrzeugsteuersystem, bei dem die elektrische Steuerung ausgebildet ist, um beim Vorliegen von vorbestimmten Fahrdaten und/oder Umfeldbildern eine autonome Bremsung des Kraftwagens auszulösen. Gemäß einem zweiten Aspekt löst die Erfindung das Problem durch ein gattungsgemäßes Verfahren, das den Schritt eines Überpröfens, ob vorbestimmte Fahrdaten und/oder Umfeldbilder vorliegen, um bejahendenfalls eine autonome Bremsung des Kraftwagens auszulösen, um- fasst.The invention has for its object to overcome disadvantages in the prior art. The invention solves the problem by a generic vehicle control system in which the electrical control is designed to be in the presence of predetermined driving data and / or environment images to trigger an autonomous braking of the motor vehicle. According to a second aspect, the invention solves the problem by a generic method comprising the step of verifying whether predetermined driving data and / or environmental images are present in order to initiate autonomous braking of the motor vehicle if so required.
Vorteilhaft an der Erfindung ist, dass die Kamera sowohl Bilder für den Unfalldatenschreiber als auch für ein Fahrerassistenzsystem, beispielsweise ein Spurhalte- oder ein Bremsassistenzsystem, liefern kann, das Unfälle vermeidet oder deren Folgen dadurch mindert, dass es das Fahrzeug autonom, also ohne Eingriff des Fahrers, abbremst. Hierdurch wird eine zusätzliche Bremsassistenzsystem-Kamera entbehrlich. Beispielsweise kann die elektrische Steuerung auch Teil des Fahrerassistenzsystems sein, wodurch der Synergieeffekt verstärkt wird.An advantage of the invention is that the camera can deliver both images for the accident data recorder as well as for a driver assistance system, such as a lane keeping or a brake assist system that avoids accidents or their consequences thereby reduces that it autonomously, ie without intervention of the vehicle Driver, decelerates. This eliminates the need for an additional brake assist system camera. For example, the electrical control may also be part of the driver assistance system, whereby the synergy effect is enhanced.
Gemäß einer bevorzugten Ausführungsform ist die Kamera eine Spurhaltekamera, die ausgebildet ist, um im Betrieb des Kraftwagens eine Fahrspurmarkierung zu erfassen. Es wird so vorteilhafterweise eine besonders große Synergie erzielt, da eine zusätzliche Kamera für das Spurhalteassistenzsystem entbehrlich ist.According to a preferred embodiment, the camera is a tracking camera, which is designed to detect a lane marking during operation of the motor vehicle. It is thus advantageously achieved a particularly large synergy, since an additional camera for the lane keeping assistance system is unnecessary.
Bevorzugt umfasst das Fahrzeugsteuersystem zudem eine Rückfahrkamera zum Aufnehmen von Rückfahrbildern, wobei der Unfalldatenschreiber eingerichtet ist zum gepufferten Aufzeichnen auch der Rückfahrbilder. Auf diese Weise kann im Falle eines Massenunfalls geklärt werden, ob der betreffende Kraftwagen selbst auf ein vorausfahrendes Fahrzeug aufgefahren ist oder von einem nachfolgenden Fahrzeug auf das vorweg fahrende Fahrzeug geschoben wurde. Es ist zudem möglich, die Rückfahrbilder zu verwenden, um Kriterien für eine autonome Bremsung zu ermitteln.Preferably, the vehicle control system further comprises a reversing camera for taking back images, wherein the accident data recorder is set up for buffered recording of the reversing images. In this way, it can be clarified in the event of a mass accident, whether the car in question has driven itself to a preceding vehicle or was pushed by a subsequent vehicle on the anticipatory moving vehicle. It is also possible to use the reversing images to determine criteria for autonomous braking.
Um ein möglichst umfassendes Bild des Unfallgeschehens zu erhalten und um das Fahrzeugsteuersystem besonders leicht verbessern zu können, ist in einer bevorzugten Ausfüh- rungsform vorgesehen, dass ein Abstandssensor, der zum Erfassen von Abstandsdaten eines Abstands zu einem vorausfahrenden Fahrzeug ausgebildet ist, am Kraftwagen angeordnet ist und dass der Unfalldatenschreiber eingerichtet ist zum gepufferten Aufzeichnen der Abstandsdaten. Dabei ist die elektrische Steuerung ausgebildet, um Abstands- und Gierra- tensensordaten als Fahrdaten zu erfassen. Dadurch werden die Abstands- und Gierraten- sensordaten bei der Bewertung berücksichtigt, ob eine autonome Bremsung durchgeführt werden soll. Es ergibt sich so eine Synergie, da die Abstands- und Gierratensensor nur einmal vorgesehen werden müssen. Das Fahrzeugsteuersystem kann zudem eine Abstandsermittlungs-Kamera umfassen, die so angeordnet ist, dass aus den von ihr aufgenommenen Bildern ein Abstand und eine Relativgeschwindigkeit zu einem vorausfahrenden Fahrzeug ermittelbar sind. Die Abstandsermitt- lungs-Kamera ist insbesondere so angeordnet, dass ein Heck des vorausfahrenden Fahrzeugs in ihrem Blickfeld ist.In order to obtain the most comprehensive picture possible of the accident occurrence and to be able to improve the vehicle control system particularly easily, it is provided in a preferred embodiment that a distance sensor which is designed to acquire distance data of a distance to a vehicle in front is arranged on the motor vehicle and that the accident data recorder is arranged to buffer-record the distance data. In this case, the electrical control is designed to detect distance and yaw rate sensor data as driving data. As a result, the distance and yaw rate sensor data are considered in the evaluation as to whether autonomous braking is to be performed. This results in a synergy, since the distance and yaw rate sensor must be provided only once. The vehicle control system may also include a distance detection camera, which is arranged so that a distance and a relative speed to a vehicle in front can be determined from the images taken by it. In particular, the distance detection camera is arranged such that a rear of the vehicle in front is in its field of vision.
Besonders bevorzugt umfasst das Fahrzeugsteuersystem zudem einen Beschleunigungssensor und/oder einen Gierratensensor und/oder einen Lenkwinkelsensor, wobei der Unfall- datenschreiber eingerichtet ist, um auch von diesen Sensoren eingehende Daten gepuffert aufzuzeichnen. Alle eingehenden Daten werden dabei so aufgezeichnet, dass sie in ihrer zeitlichen Abfolge rekonstruierbar sind. Die elektrische Steuerung ist wiederum ausgebildet, um Beschleunigungssensordaten und/oder Gierratensensordaten und/oder Lenkwinkelsensor als Fahrdaten zu erfassen und anhand dieser Daten zu entscheiden, ob eine autonome Bremsung durchgeführt werden soll.The vehicle control system also particularly preferably comprises an acceleration sensor and / or a yaw rate sensor and / or a steering angle sensor, wherein the accident data recorder is set up to also record data that is incoming from these sensors in buffered form. All incoming data is recorded in such a way that they can be reconstructed in their time sequence. The electrical control is in turn designed to detect acceleration sensor data and / or yaw rate sensor data and / or steering angle sensor as driving data and to decide on the basis of this data whether an autonomous braking should be performed.
Es hat sich als vorteilhaft herausgestellt, wenn der Unfalldatenschreiber ausgebildet ist, um 0,1 bis 100 Bilder pro Sekunde zu speichern. Es ist zudem möglich, die Bilder vor dem Abspeichern zu komprimieren, um Speicherplatz zu sparen. Geeignete Kompressionsverfahren gehören zum Stand der Technik.It has proven to be advantageous if the accident data recorder is designed to store 0.1 to 100 images per second. It is also possible to compress the images before saving in order to save storage space. Suitable compression methods are known in the art.
Besonders bevorzugt ist das Fahrzeugsteuersystem ausgestattet mitParticularly preferably, the vehicle control system is equipped with
(a) einem Spurhalteassistenzsystem, das eine Spurhaltekamera, die ausgebildet ist, um beim Betrieb des Kraftwagens eine Fahrspurmarkierung einer Fahrspur zu erfassen, und eine elektrische Assistenzsystem-Steuerung, die eingerichtet ist zum Ausgeben eines Spurhaltesignals, wenn beim Betrieb der Kraftwagen die Fahrspur verlässt, umfasst und/oder(a) a lane departure warning system that includes a tracking camera configured to detect a lane mark of a traffic lane during operation of the motor vehicle, and an electrical assistance system controller configured to output a lane departure signal when the vehicles leave the traffic lane in operation; includes and / or
(b) einem Abstandsassistenzsystem, das - einen Abstandssensor zum Erfassen eines Abstands des Kraftwagens zu einem vorausfahrenden Fahrzeug und einer elektrischen Abstandsassistenz-Steuerung, die eingerichtet ist zum Ausgeben eines Abstandssignals, wenn beim Betrieb der Kraftwagen einen vorgegebenen Mindestabstand zum vorausfahrenden Fahrzeug unterschreitet oder in eine kollisionskritische Situation kommt, bei der der Fahrer eine vorgegebene Bremsverzögerung aufbringen muss, um einen Aufprall auf das vorausfahrende Fahrzeug zu verhindern, und (c) einem Notbremssystem, das eine elektrische Notbremssystem-Steuerung, die eingerichtet ist zum autonomen Bremsen des Kraftwagens, umfasst, wobei(B) a distance assist system, the - a distance sensor for detecting a distance of the motor vehicle to a preceding vehicle and an electrical distance assistance controller, which is adapted for outputting a distance signal, when in operation of the car falls below a predetermined minimum distance to the vehicle in front or in a collision critical situation occurs, in which the driver must apply a predetermined braking deceleration, to prevent an impact on the vehicle in front, and (c) an emergency braking system comprising an electric emergency braking system control arranged to autonomously brake the motor vehicle, wherein
(d) die elektrische Notbremssystem-Steuerung mit der Spurhaltekamera und dem Abstandssensor verbunden ist, so dass diese eine redundante Erfassung des voraus- fahrenden Fahrzeugs ermöglichen.(D) the electric emergency brake system control is connected to the tracking camera and the distance sensor, so that they allow a redundant detection of the vehicle ahead.
Die von den angegebenen Kameras gelieferten Bilder können also einerseits für ein Assistenzsystem verwendet und zudem in dem Unfalldatenspeicher gepuffert gespeichert werden. Statt die komplette Umfeldsensorik im Kraftwagen doppelt vorzusehen, um die nötige Re- dundanz zur erzeugen, werden so vorteilhafterweise die Informationen von Umfeldsensoren, die für den Unfalldatenschreiber oder ein automatisches Fahrerassistenzsystem (adaptive cruise control, ACC) vorgehalten werden, genutzt, um die für die Notbremsfunktion notwendige Redundanz darzustellen. Bevorzugt ist die elektrische Steuerung ausgebildet, um einerseits aus den aufgenommenen Bildern Daten über Spurlage und Spurradius zu erzeugen und andererseits Daten über die Lage lateraler Objekte und deren Breite zu liefern. Die elektrische Steuerung ist zudem ausgebildet, um die so erhaltenen Daten mit vorhandenen, unveränderten Daten von Fahrsensoren des Fahrerassistenzsystems zu kombinieren, um so redundant abgesicherte, verfeinerte Objektdaten für das Notbremssystem zu erhalten.The images supplied by the specified cameras can therefore be used on the one hand for an assistance system and, moreover, stored buffered in the accident data memory. Instead of double provision of the complete environment sensor system in the motor vehicle in order to generate the requisite redundancy, the information from environmental sensors provided for the accident data recorder or an automatic driver assistance system (ACC) is advantageously used to calculate the information for the environment Emergency braking function to represent necessary redundancy. Preferably, the electrical control is designed to generate on the one hand from the recorded images data on tracking and track radius and on the other hand to provide data on the position of lateral objects and their width. The electrical control is also designed to combine the data thus obtained with existing, unchanged data from driving sensors of the driver assistance system so as to obtain redundantly secured, refined object data for the emergency braking system.
Im Folgenden wird die Erfindung anhand der beigefügten Zeichnung näher erläutert. Dabei zeigtIn the following the invention will be explained in more detail with reference to the accompanying drawing. It shows
Figur 1 einen erfindungsgemäßen Kraftwagen.1 shows a motor vehicle according to the invention.
Figur 1 zeigt einen Kraftwagen 10 in Form eines schematisch eingezeichneten Busses in einer Ansicht von oben, der ausgebildet ist, um auf einer Fahrbahn 12 zu fahren. Die Fahrbahn 12 umfasst eine Fahrspurmarkierung in Form eine Fahrstreifenmarkierung 14 und einer Fahrstreifenbegrenzungsmarkierung 16.1 shows a motor vehicle 10 in the form of a schematically drawn bus in a view from above, which is designed to travel on a roadway 12. The lane 12 includes a lane marker in the form of a lane marker 14 and a lane boundary marker 16.
An einer Vorderseite 18 besitzt der Kraftwagen 10 einen Fahrdatensensor 20 in Form eines Abstandssensors, der einen Abstand A und eine Relativgeschwindigkeit DV zu einem vorausfahrenden Fahrzeug 22 ermittelt. Der Kraftwagen 10 besitzt in der Mitte einer Fahrzeugfront, vorzugsweise an der Windschutzscheibe angeordnet, eine Spurhaltekamera 24, die in einem Spurhaltekamera-Gesichtsfeld G die die Fahrstreifenmarkierung 14 und die Fahrstrei- fenbegrenzungsmarkierung 16 erfasst. Die Spurhaltekamera 24 ist so angeordnet, dass das Spurhaltekamera-Gesichtsfeld G zudem das vorausfahrende Fahrzeug 22 zumindest teilweise erfasst. Die Spurhaltekamera 24 und der Fahrdatensensor 20 sind mit einer elektrischen Steuerung 26 verbunden. Die elektrische Steuerung 26 wertet von der Spurhaltekamera 24 mit einer Frequenz von 10 bis 50 Bildern pro Sekunde einkommende Bilder aus und ermittelt über einen einprogrammierten Algorithmus, ob der Kraftwagen 10 sich auf unzulässige Weise der Fahrstreifenbegrenzungsmarkierung 16 nähert bzw. diese überquert. Ist das Fall, wird ein Spurhaltesignal an einen Fahrer des Kraftwagens 10 ausgegeben, das diesen warnt. Wenn von der elektrischen Steuerung 26 eine Situation erkannt wird, die mit einer oberhalb einer vorgegebenen Schwellenwahrscheinlichkeit zu einem Unfall führt, so aktiviert die elektrische Steuerung 26 Radbremsen des Fahrzeugs 10 und bremst es so auch ohne weiteres Zutun des Fahrers , um den drohenden Unfalls abzuwenden oder dessen Folgen zu mindern.At a front side 18, the motor vehicle 10 has a driving data sensor 20 in the form of a distance sensor, which determines a distance A and a relative speed DV to a vehicle 22 traveling in front. The motor vehicle 10 has in the center of a vehicle front, preferably arranged on the windshield, a tracking camera 24 which detects the lane marker 14 and the Fahrstrei- fenbegrenzungsmarkierung 16 in a lane keeping camera field of view G. The tracking camera 24 is arranged so that the lane keeping camera field of view G also at least partially detects the preceding vehicle 22. The lane keeping camera 24 and the driving data sensor 20 are connected to an electric controller 26. The electric controller 26 evaluates incoming images from the tracking camera 24 at a frequency of 10 to 50 frames per second and determines, via a programmed algorithm, whether the motor vehicle 10 is approaching or crossing the lane boundary marker 16 in an improper manner. If so, a lane departure warning signal is issued to a driver of the motor vehicle 10 who warns the driver. If a situation is detected by the electric control 26, which leads to an accident with a threshold above a predetermined threshold, then activates the electric control 26 wheel brakes of the vehicle 10 and brakes so without further action of the driver to avert the impending accident or to reduce its consequences.
Der Fahrdatensensor 20 erfasst in regelmäßigen Zeitabständen den Abstand A und die Relativgeschwindigkeit DV zum vorausfahrenden Fahrzeug 22 und sendet diese Messdaten ebenfalls an die elektrische Steuerung 26. Wird aufgrund der Bewegung des eigenen Kraftwagens 10 und der Abstands- und Relativgeschwindigkeitsdaten des vorausfahrenden Fahrzeugs 22 eine kollisionskritische Situation erkannt, so gibt die elektrische Steuerung 26 e- benfalls ein Warnsignal an den Fahrer aus. Eine derartige kritische Situation kann beispielsweise dann vorgesehen sein, wenn die vom Fahrer nach seiner antizipierten Reaktionszeit zu erbringende Verzögerung einen vorgegebenen Schwellenwert überschreitet. Die elektrische Steuerung 26 schreibt alle oder eine vorgegebene Auswahl der von dem Fahrdatensensor 20 oder der Spurhaltekamera 26 kommenden Daten in einen Unfalldatenschreiber 28. So ist es möglich, dass jeder ankommende Messwert im Unfalldatenschreiben 28 gespeichert wird. Möglich ist es jedoch aus, dass jeder n-te Messwert, beispielsweise jeder fünfte oder zehnte, gespeichert wird.The driving data sensor 20 detects at regular intervals the distance A and the relative speed DV to the vehicle in front 22 and sends this measurement data also to the electric controller 26. Due to the movement of the own motor vehicle 10 and the distance and relative speed data of the preceding vehicle 22 a collision critical situation detected, the electrical control 26 also emits a warning signal to the driver. Such a critical situation can be provided, for example, when the delay to be provided by the driver after his anticipated reaction time exceeds a predetermined threshold. The electric controller 26 writes all or a predetermined selection of the data coming from the driving data sensor 20 or the tracking camera 26 into an accident data recorder 28. Thus, it is possible that each incoming measured value is stored in the accident data writing 28. However, it is possible that every nth measured value, for example every fifth or tenth, is stored.
Der Unfalldatenschreiber 28 zeichnet die einkommenden Messdaten gepuffert auf, was heißt, dass Messdaten, die älter sind als eine vorgegebene Vorhaltezeit T, die von der Speicherkapazität des Unfalldatenschreibers abhängt und beispielsweise 20 Sekunden beträgt, automatisch gelöscht werden. Bei einem Unfall des Kraftwagens 10, der beispielsweise durch einen Verzögerungssensor 29 detektiert wird, werden keine Daten mehr gelöscht. Aus den bis dahin im Unfalldatenschreiber 28 aufgezeichneten Daten lässt sich dann der Unfallhergang rekonstruieren.The accident data recorder 28 records the incoming measurement data buffered, which means that measurement data which are older than a predetermined derivative time T, which depends on the storage capacity of the accident data recorder and is for example 20 seconds, are automatically deleted. In an accident of the motor vehicle 10, which is detected for example by a deceleration sensor 29, no data is deleted. The accident history can then be reconstructed from the data previously recorded in the accident data recorder 28.
Der Kraftwagen 10 besitzt zudem eine Rückfahrkamera 30, die ein Rückfahrkamera- Gesichtsfeld R besitzt. Die Rückfahrkamera 30 ist ebenfalls mit der elektrischen Steuerung 26 oder direkt mit dem Unfalldatenschreiber 28 verbunden. Der Kraftwagen 10 besitzt zudem einen Gierratensensor 32 und/oder einen Lenkwinkelsensor 34, die ebenfalls mit der elektrischen Steuerung 26 in Verbindung stehen und deren Daten ebenfalls vom Unfalldatenschreiber 28 aufgezeichnet werden. Der Lenkwinkelsensor 34 erfasst einen Lenkwinkel eines nicht eingezeichneten Lenkrads. The motor vehicle 10 also has a rear view camera 30, which has a reversing camera field of view R. The reversing camera 30 is also connected to the electric control 26 or directly to the accident data recorder 28. The motor vehicle 10 also has a yaw rate sensor 32 and / or a steering angle sensor 34, which are also in communication with the electrical control 26 and whose data are also recorded by the accident data recorder 28. The steering angle sensor 34 detects a steering angle of a not shown steering wheel.

Claims

Patentansprüche claims
1. Fahrzeugsteuersystem für einen Kraftwagen (10), mit:A vehicle control system for a motor vehicle (10), comprising:
(a) mindestens einem Fahrdatensensor (20) zum Erfassen von einen Fahrzustand des Kraftwagen charakterisierenden Fahrdaten(A) at least one driving data sensor (20) for detecting driving data characterizing a driving condition of the motor vehicle
(b) mindestens einer Kamera (24, 30) zum Erfassen von Umfeldbildern,(b) at least one camera (24, 30) for capturing environmental images,
(c) einem Unfalldatenschreiber (28), der eingerichtet ist zum gepufferten Aufzeichnen der Umfeldbilder, und(c) an accident data recorder (28) arranged to buffer the environmental images, and
(d) einer elektrischen Steuerung (26) zum Steuern des Fahrdatensensors (20), der Kamera (24, 30) und des Unfalldatenschreibers (28), dadurch gekennzeichnet, dass(D) an electrical controller (26) for controlling the driving data sensor (20), the camera (24, 30) and the accident data recorder (28), characterized in that
(e) die elektrische Steuerung (26) ausgebildet ist, um beim Vorliegen von vorbestimmten Fahrdaten und/oder Umfeldbildern eine autonome Bremsung des Kraftwagens (10) auszulösen.(E) the electrical control (26) is designed to trigger an autonomous braking of the motor vehicle (10) in the presence of predetermined driving data and / or environment images.
2. Fahrzeugsteuersystem nach Anspruch 1 , dadurch gekennzeichnet, dass die Kamera eine Spurhaltekamera (24) ist, die ausgebildet ist, um im Betrieb des Kraftwagens (10) eine Fahrspurmarkierung (14, 16) zu erfassen.2. Vehicle control system according to claim 1, characterized in that the camera is a tracking camera (24) which is designed to detect a lane marking (14, 16) during operation of the motor vehicle (10).
3. Fahrzeugsteuersystem nach einem der vorstehenden Ansprüche, gekennzeichnet durch eine Rückfahrkamera (30) zum Aufnehmen von Rückfahrbildern, wobei der Unfalldatenschreiber (28) eingerichtet ist zum gepufferten Aufzeichnen auch der Rückfahrbilder.3. Vehicle control system according to one of the preceding claims, characterized by a reversing camera (30) for recording return images, wherein the accident data recorder (28) is arranged for buffered recording of the reversing images.
4. Fahrzeugsteuersystem nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein Abstandssensor (20), der zum Erfassen von Abstands- und Relativgeschwindigkeiten (A, DV) zu einem vorausfahrenden Fahrzeug (22) ausgebildet ist, am Kraftwagen (10) angeordnet ist, - der Unfalldatenschreiber (28) eingerichtet ist zum gepufferten Aufzeichnen der4. Vehicle control system according to one of the preceding claims, characterized in that a distance sensor (20), which is designed to detect distance and relative speeds (A, DV) to a preceding vehicle (22), is arranged on the motor vehicle (10), - the accident data recorder (28) is set up for buffered recording of
Abstandsdaten und dass die elektrische Steuerung (26) ausgebildet ist, um Abstands- und Gierraten- sensordaten als Fahrdaten zu erfassen.Distance data and that the electrical control (26) is designed to detect distance and yaw rate sensor data as driving data.
5. Fahrzeugsteuersystem nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass es einen Beschleunigungssensor und/oder einen Gierratensensor und/oder einen Lenkwinkelsensor umfasst, der Unfalldatenschreiber (28) eingerichtet ist zum gepufferten Aufzeichnen der von diesen Sensoren erzeugten Daten und - dass die elektrische Steuerung (26) ausgebildet ist, um Beschleunigungssensordaten und/oder Gierratensensordaten und/oder Lenkwinkelsensor als Fahrdaten zu erfassen.5. Vehicle control system according to one of the preceding claims, characterized in that it an acceleration sensor and / or a yaw rate sensor and / or a steering angle sensor, the accident data recorder (28) is adapted for buffered recording of the data generated by these sensors and - that the electrical control (26) is designed to accelerator sensor data and / or yaw rate sensor data and / or to detect steering angle sensor as driving data.
6. Fahrzeugsteuersystem nach einem der vorstehenden Ansprüche, dadurch gekenn- zeichnet, dass der Unfalldatenschreiber (28) ausgebildet ist, um 0,1 bis 100 Bilder pro6. Vehicle control system according to one of the preceding claims, characterized in that the accident data recorder (28) is formed by 0.1 to 100 images per
Sekunde zu speichern.Second to save.
7. Kraftwagen, gekennzeichnet durch ein Fahrzeugsteuersystem nach einem der Ansprüche 1 bis 6 und/oder mit: (a) einem Spurhalteassistenzsystem, das eine Spurhaltekamera (24), die ausgebildet ist, um beim Betrieb des Kraftwagens (10) eine Fahrspurmarkierung (14, 16) einer Fahrbahn (12) zu erfassen, und eine elektrische Assistenzsystem-Steuerung, die eingerichtet ist zum Aus- geben eines Spurhaltesignals, wenn beim Betrieb der Kraftwagen (10) dieA motor vehicle characterized by a vehicle control system according to any one of claims 1 to 6 and / or comprising: (a) a lane departure warning system including a lane keeping camera (24) adapted to provide a lane marking (14, 14) during operation of the motor vehicle (10); 16) of a roadway (12), and an electrical assistance system controller, which is set up for outputting a lane-keeping signal, when in operation of the motor vehicle (10)
Fahrspur (12) verlässt, umfasst und/oder (b) einem Abstandsassistenzsystem, das einen Abstandssensor (20) zum Erfassen eines Abstands (A) und einer Relativgeschwindigkeit (DV) des Kraftwagens (10) zu einem vorausfahrenden Fahrzeug (22) und einer elektrischen Abstandsassistenz-Steuerung, die eingerichtet ist zum Ausgeben eines Abstandswarnsignals, wenn beim Betrieb der Kraftwagen (10) einen vorgegebenen Mindestabstand zum vorausfahrenden Fahrzeug (22) unterschreitet, und (c) einem Notbremssystem, das eine elektrische Notbremssystem-Steuerung, die eingerichtet ist zum autonomen Bremsen des Kraftwagens (10), umfasst, wobei (d) die elektrische Notbremssystem-Steuerung mit der Spurhaltekamera (24) und dem Abstandssensor (20) verbunden ist, so dass diese eine redundante Erfassung des vorausfahrenden Fahrzeugs (22) ermöglichen.Lane (12) leaves, comprises and / or (b) a distance assistance system comprising a distance sensor (20) for detecting a distance (A) and a relative speed (DV) of the motor vehicle (10) to a preceding vehicle (22) and an electric vehicle A distance assist control device configured to output a distance warning signal when, during operation, the car (10) falls below a predetermined minimum distance to the preceding vehicle (22), and (c) an emergency braking system having an electric emergency braking system control adapted to autonomously Braking the motor vehicle (10), wherein (d) the electrical emergency brake system control with the tracking camera (24) and the distance sensor (20) is connected, so that they allow redundant detection of the preceding vehicle (22).
8. Kraftwagen (10) nach Anspruch 7, dadurch gekennzeichnet, dass er ein Bus oder ein Lastkraftwagen ist. 8. motor vehicle (10) according to claim 7, characterized in that it is a bus or a truck.
9. Verfahren zum Betreiben eines Kraftwagens (10) mit den folgenden Schritten:9. A method of operating a motor vehicle (10) comprising the steps of:
(a) Erfassen von Fahrdaten,(a) acquiring driving data,
(b) Erfassen von Umfeldbildern und (c) gepuffertes Aufzeichnen der Umfeldbilder in einem Unfalldatenschreiber (28), gekennzeichnet durch den Schritt:(b) capturing environmental images; and (c) buffering the environmental images in an accident data recorder (28), characterized by the step of:
(d) Überprüfen, ob vorbestimmte Fahrdaten und/oder Umfeldbilder vorliegen, um bejahendenfalls eine autonome Bremsung des Kraftwagens (10) auszulösen .(D) Check whether predetermined driving data and / or environment images are present in order to trigger an autonomous braking of the motor vehicle (10) if so.
10. Verfahren nach Anspruch 9, gekennzeichnet durch den Schritt: - Erfassen von Rückfahrkamerabildern einer an einem Heck des Kraftwagens (10) befestigten Rückfahrkamera (30) und gepuffertes Aufzeichnen der Rückfahrkamerabildern mit dem Unfalldatenschreiber (28). 10. The method of claim 9, characterized by the step: - Detecting Rückfahrkamerabildern one at a rear of the motor vehicle (10) attached rear view camera (30) and buffered recording the Rückfahrkamerabildern with the accident data recorder (28).
EP08774004A 2007-09-06 2008-07-17 Motor vehicle control system Ceased EP2201534A1 (en)

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