WO2021136661A1 - Method for a seatbelt system, seatbelt system for a vehicle, and vehicle comprising a seatbelt system - Google Patents

Method for a seatbelt system, seatbelt system for a vehicle, and vehicle comprising a seatbelt system Download PDF

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Publication number
WO2021136661A1
WO2021136661A1 PCT/EP2020/086379 EP2020086379W WO2021136661A1 WO 2021136661 A1 WO2021136661 A1 WO 2021136661A1 EP 2020086379 W EP2020086379 W EP 2020086379W WO 2021136661 A1 WO2021136661 A1 WO 2021136661A1
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WO
WIPO (PCT)
Prior art keywords
belt
vehicle
tensioner
control unit
seat
Prior art date
Application number
PCT/EP2020/086379
Other languages
German (de)
French (fr)
Inventor
Martin Seyffert
Karl Birk
Original Assignee
Zf Automotive Germany 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 Zf Automotive Germany Gmbh filed Critical Zf Automotive Germany Gmbh
Publication of WO2021136661A1 publication Critical patent/WO2021136661A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—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
    • B60R21/01544—Passenger detection systems detecting seat belt parameters, e.g. length, tension or height-adjustment
    • B60R21/01548—Passenger detection systems detecting seat belt parameters, e.g. length, tension or height-adjustment sensing the amount of belt winded on retractor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R2022/4666—Reels with means to tension the belt in an emergency by forced winding up characterised by electric actuators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R2022/469—Reels with means to tension the belt in an emergency by forced winding up reusable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
    • B60R2022/4808—Sensing means arrangements therefor
    • B60R2022/4825—Sensing means arrangements therefor for sensing amount of belt winded on retractor

Definitions

  • the invention relates to a method for a seat belt system in a vehicle, the seat belt system comprising an extendable seat belt.
  • the invention also relates to a seat belt system for a vehicle and a vehicle with such a seat belt system.
  • Safety belt systems for vehicles are known in principle. These have the function of holding back a vehicle occupant wearing the seat belt in the seat when the forces acting on the vehicle occupant are high, for example in the event of emergency braking or a crash, and in this way to increase safety.
  • seat belts with belt retractors which have a belt tensioner that can be actively controlled.
  • this can be done, for example, by means of an artificially generated alternating magnetic field.
  • a magnetic wheel or another magnetic component is used to connect it to the reel-up shaft in a rotationally fixed manner, so that a periodically changing magnetic field is generated when it rotates.
  • This field is detected by means of a suitable magnetic field sensor, usually a fall sensor, and from the information obtained therefrom, the rotational speed and / or the angle of rotation and / or the direction of rotation of the reel shaft is closed.
  • the Hall sensors are usually attached directly to an ECU board of the seat belt tensioner.
  • the object of the invention is to provide an alternative method by means of which the angle of rotation and / or the direction of rotation of the retractor shaft / axis of the belt reel can be determined in a simple manner.
  • the object of the invention is furthermore to provide a seat belt system which is designed to carry out such a method and which has an alternative, preferably simplified structure.
  • a method for a seat belt system in a vehicle comprising a control unit and at least one seat belt with an extendable belt strap, a belt retractor with a belt reel with a belt tensioner and a belt belt extension measuring device.
  • the method has the following steps: a) determining a movement of a motor of the belt tensioner, b) determining a direction of rotation of the motor of the belt tensioner, c) determining an angle change of a retractor shaft of the belt reel, d) controlling the motor of the belt tensioner by means of the determined direction of rotation and Change of angle.
  • control unit of the seat belt system detects a movement of the belt tensioner motor
  • control unit determines the direction of rotation of the belt tensioner motor and the change in angle and / or the angle of rotation of the retractor shaft of the belt reel.
  • the motor of the belt tensioner can be controlled by the control unit by means of the determined direction of rotation and change in angle and / or angle of rotation.
  • the direction of rotation of the belt tensioner motor can of course also be determined via the direction of rotation of the reel shaft of the belt reel.
  • control unit If the direction of rotation of the motor or the change in angle of the reel shaft cannot be determined, there may be the possibility that an emergency or error program is activated by the control unit. It can be provided, for example, that a control of the motor and thus a The function of the belt tensioner is suspended until the direction of rotation of the motor and the change in angle of the retractor shaft can be determined again. In addition, it can be provided that the control unit outputs a warning signal to the vehicle occupant.
  • the belt tensioner is preferably an actively controllable and reversible belt tensioner, which is used, for example, to pre-tension the belt strap in a pre-crash phase and / or to tighten the belt strap during a dynamic driving situation of the vehicle in which the seat belt system is arranged, can be used.
  • the direction of rotation of the motor and the change in angle and / or the angle of rotation of the reel shaft of the belt reel are determined by the control unit, preferably via the belt extension measured by the belt measuring device.
  • the control unit of the seat belt system can comprise an electronic control unit / ECU of the seat belt tensioner.
  • the electronic control unit / ECU of the belt tensioner can be arranged in or on the belt retractor and connected to the control unit in a signal-transmitting manner, so that the control unit can transmit signals for engine control to the electronic control unit / ECU of the belt tensioner.
  • the belt extension is preferably measured by the belt extension measuring device in a relative measuring method.
  • Relative means that only the length and preferably the speed of the belt webbing extension is measured or determined during a belt webbing movement, but it is not known, for example, how far the belt webbing is pulled out in relation to a storage position in which the seat belt is not in use.
  • a relative measurement of the belt webbing extension is sufficient, since the direction of rotation of the belt tensioner motor and the change in angle and / or the angle of rotation of the reel shaft of the belt reel can be determined with sufficient accuracy.
  • the sensor and / or a measuring scale of the belt measuring device are preferably attached or arranged in the belt retractor on the retractor shaft / axle.
  • the belt extension can of course also be measured absolutely or quasi-absolutely by the belt extension measuring device.
  • Absolute means that an absolute value of the belt extension is passed on to the control unit by the belt extension measuring device, that is to say that a certain value is assigned to each belt extension length in an associated measuring scale.
  • the webbing pull-out measuring device is always active, that is, it “does not sleep” or has no stand-by mode in which no measurements are taken. In this way it can be prevented that the belt webbing can be pulled out or wound up without this being detected by the seat belt system.
  • the actual webbing extension is known at all times, both for the absolute and for the quasi-absolute measurement, and / or can be reliably determined.
  • further conditions are to be checked by the control unit in further processes via the determined belt strap extension, for example whether a vehicle occupant is properly buckled up (so-called misuse detection) and / or whether the vehicle occupant is in an incorrect sitting position on the vehicle seat is located (so-called out-of-position detection).
  • the sensor and / or a measuring scale of the belt webbing measuring device can also be arranged on the belt webbing.
  • the belt strap should regularly be pulled in by the reversible belt tensioner using a separate process in order to reduce or avoid the film reel effect, so that the angle change of the reel shaft can be inferred from the exact belt extension.
  • the control unit of the seat belt system can be designed as a separate control unit for a vehicle control unit of the vehicle or, alternatively, it can be integrated into the vehicle control unit, in particular the on-board computer of the vehicle. If the control unit is separate from the Vehicle control unit is designed, the control unit is preferably designed so that it can communicate with it and exchange data.
  • the control unit is connected in a signal-transmitting manner to at least the belt webbing extension measuring device, the belt tensioner and the electronic control unit / ECU of the belt tensioner of the seat belt of the seat belt system.
  • the control unit is also preferably connected to further sensor elements of the seat belt system, such as the locking sensor of the lock and / or the pressure sensor in the vehicle seat, and / or output devices and / or further sensors of the vehicle.
  • the method according to the invention makes it possible to dispense with a fall sensor, the integration of which into the belt retractor is complex, since the detection of the direction of rotation of the belt tensioner motor and the change in angle and / or the angle of rotation of the retractor shaft of the belt reel is sufficiently accurate by the control unit and / or the electronic control unit / ECU of the belt tensioner can take place by means of the belt belt extension determined by the belt belt extension measuring device.
  • a seat belt system for a vehicle in particular for the protection of a vehicle occupant, is provided to solve the above-mentioned object, the seat belt system comprising a control unit and at least one seat belt with an extendable belt strap, and a belt retractor with a belt reel, a belt tensioner and a belt belt extension measuring device .
  • the control unit of the seat belt system according to the invention is set up to carry out the method according to the invention.
  • the seat belt system has the corresponding advantages of the aforementioned method.
  • the belt tensioner of the seat belt is designed in particular as an actively controllable, reversible belt tensioner with a motor.
  • the determination of the angle of rotation and / or an angle change of the belt reel and / or the direction of rotation of the belt reel and / or the motor of the belt tensioner takes place via the belt extension determined by the belt measuring device. Therefore, in the seat belt retractor of the Seat belt system in particular does not require a Hall sensor for this determination.
  • the seat belt system comprises a plurality of seat belts with an extendable belt webbing, a belt retractor with a belt reel, a belt tensioner and a belt webbing pull-out measuring device.
  • a seat belt with an extendable belt strap, a belt retractor with a belt reel, a belt tensioner and a belt belt extension measuring device are assigned to each vehicle seat in particular.
  • the method according to the invention can in particular be carried out simultaneously for the respective seat belts.
  • a vehicle with a seat belt system according to the invention with the advantages mentioned above is provided to achieve the above-mentioned object.
  • Figure 2 is a schematic representation of a vehicle according to the invention with a seat belt system according to the invention.
  • a belt retractor 126 from the prior art is shown in the form of a retractor tensioner.
  • the belt retractor 126 comprises a retractor shaft 128 for receiving the belt (not shown in FIG. 1), which is connected via a drive unit 142 of the belt tensioner 138 to a drive motor 140 of the belt tensioner 138 for tightening or pre-tensioning the belt.
  • a magnetic element 144 for example a magnetic wheel, is non-rotatably connected to the drive motor 140.
  • a magnetic flux-guiding element 146 is arranged, which is fastened to an ECU board 136 of the belt tensioner 138, see FIG. 1 b).
  • a Hall sensor 148 is also mounted on the ECU board 136.
  • FIG. 2 shows a seat belt system 10 for a vehicle occupant 12 in a vehicle 14, which here is a car.
  • the vehicle occupant 2 sits on a driver's seat 16 of the vehicle 14.
  • the vehicle 14 has a drive for accelerating the vehicle 14 and a braking device for braking the vehicle 14.
  • the seat belt system 10 can comprise a plurality of seat belts 18 and be provided for any vehicle seats 16 in a vehicle 14 in order to protect the corresponding vehicle occupant 12 in the event of a restraint, such as a crash.
  • the seat belt system 10 is suitable for use in any vehicles, in particular autonomously driving vehicles.
  • the seat belt system 10 includes a seat belt 18.
  • the seat belt 18 includes an extendable belt strap and a tongue 22 and a belt lock 24, the tongue 22 being latchable in the belt lock 24.
  • the belt webbing 20 is used to restrain the vehicle occupant 12 in the driver's seat 16 when the belt buckle 24 is closed.
  • the seat belt lock 24 is closed by inserting the tongue 22 into the seat belt lock 24 and locking it therewith.
  • the seat belt 18 comprises a belt retractor 26 with a belt reel 28 on which the belt webbing 20 is partially wound.
  • the belt webbing 20 and thus the safety belt 18 are received in the vehicle 14 so that they can be pulled out in this way.
  • the seat belt 18 further comprises an actively controllable, reversible belt tensioner 38 with a motor 40, which is in operative connection with the belt reel 28 via a drive unit 42, for example in the form of a gear.
  • the actively controllable, reversible belt tensioner 38 enables a recurring tightening of the belt webbing 20 by activating the motor 40 so that the belt webbing 20 can be tightened, for example, even in a dynamic driving style to increase passenger comfort.
  • the belt reel 28 By activating the belt tensioner 38, the belt reel 28 can be set in rotation in order to draw in and tighten the belt webbing 20.
  • the belt reel 28 has a belt webbing pull-out measuring device 30, for example in the form of a reel rotation sensor, by means of which the rotation the belt reel 28 and thus the current belt webbing extension of the belt webbing 20 is detected relatively.
  • a belt webbing pull-out measuring device 30 for example in the form of a reel rotation sensor, by means of which the rotation the belt reel 28 and thus the current belt webbing extension of the belt webbing 20 is detected relatively.
  • the webbing extension measuring device 30 can be any device which is set up to determine the current webbing extension.
  • the belt strap measurement device can of course also measure the belt strap extension absolutely or quasi-absolutely, in particular if the belt strap extension is to be used for further processes of the seat belt system 10.
  • the vehicle 14 shown further comprises an output device 34 in the form of a display element which is suitable for transmitting information to the vehicle occupant 12, for example in an acoustic, optical and / or haptic manner.
  • the vehicle occupant 12 can use the output device to indicate that he has not put on the seat belt 18.
  • the output device 34 can be arranged at any location in the vehicle 14 that is suitable for transmitting the information to the vehicle occupant 12.
  • the output device 34 can be arranged at any location in the vehicle 14 that is suitable for transmitting the information to the vehicle occupant 12.
  • the output device 34 can be arranged at any location in the vehicle 14 that is suitable for transmitting the information to the vehicle occupant 12.
  • the output device 34 can be arranged at any location in the vehicle 14 that is suitable for transmitting the information to the vehicle occupant 12.
  • Output device 34 can be provided by output devices already present in vehicle 14, such as loudspeakers, or be integrated into them, for example in an instrument panel of vehicle 14.
  • the vehicle seat 16 comprises a pressure sensor 32 which is arranged in the seat surface of the vehicle seat 16.
  • the pressure sensor 32 can be used, for example, to determine whether a vehicle occupant 12 is sitting on the vehicle seat 16. In addition, there may be the possibility that a weight / mass of the vehicle occupant 12 is determined via the pressure sensor 32.
  • the belt extension measuring device 30 and the belt tensioner 38 are connected in a signal-transmitting manner to a control unit 36 of the seat belt system 10.
  • at least the pressure sensors 32 and the output device 34 are also connected to the control unit 36 in a signal-transmitting manner.
  • the control unit 36 is integrated in the vehicle control unit of the vehicle 14, here the on-board computer of the vehicle 14.
  • the control unit 36 of the Seat belt system 10 may be provided separately, and is preferably connected to the on-board computer of vehicle 14 in a signal-transmitting manner.
  • the control unit 36 can comprise an electronic control unit / ECU of the seat belt tensioner 38.
  • the electronic control unit / ECU of the belt tensioner can be arranged in the belt tensioner 38 or the belt retractor 26 and connected to the control unit 36 in a signal-transmitting manner.
  • the control unit 36 is set up to control the aforementioned systems and to carry out the following method for operating the seat belt system 10.
  • the direction of rotation of the motor 40 of the belt tensioner 38 as well as the change in angle and / or the Angle of rotation of the reel shaft of the belt reel 28 is determined.
  • the motor 40 of the belt tensioner 38 can be controlled by the control unit 36 by means of the determined direction of rotation and change in angle and / or angle of rotation.
  • the method according to the invention therefore makes it possible to dispense with a measurement using a Hall sensor 148 (as shown in FIG. 1) to determine the direction of rotation and the change in angle and / or the angle of rotation.
  • the control unit 36 may send an error message to the electronic control unit / ECU of the belt tensioner 38 and / or an emergency or error program is activated.
  • a control of the motor 40 and thus a function of the belt tensioner 38 is suspended until the direction of rotation of the motor 40 and the change in angle of the reel shaft of the belt reel can be determined again.
  • the control unit 38 outputs a warning signal to the vehicle occupant via the output device 34.
  • the method according to the invention can thus be used to control the belt tensioner 38, in particular to control the motor 40 of the belt tensioner 38, with no Hall sensor 148 in the belt retractor 28 for this purpose (as in FIG. 1 shown) is required to determine the direction of rotation and the change in angle and / or the angle of rotation.
  • the seat belt system 10 is not limited to a single seat belt 18, with a belt retractor with a belt tensioner 38, but rather it can comprise a plurality of seat belts 18.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

The invention relates to a method for a seatbelt system (10) in a vehicle (14), wherein the seatbelt system (10) comprises a control unit (36) and at least one extensible seatbelt (18), which extensible seatbelt has belt webbing (20), a belt retractor (26) having a belt spool (28), a belt tensioner (38), and a belt-webbing extension measurement device (30). The method comprises the following steps: a) detecting a movement of a motor (40) of the belt tensioner (38); b) determining a rotational direction of the motor (40) of the belt tensioner (38); c) determining an angle change of a retractor shaft of the belt spool (28); d) controlling the motor (40) of the belt tensioner (38) on the basis of the determined rotational direction and angle change. A seatbelt system (10) for a vehicle (14) is also provided which comprises an extensible seatbelt (18), as well as a vehicle (14) comprising a seatbelt system (10).

Description

Verfahren für ein Sicherheitsgurtsystem, Sicherheitsgurtsystem für ein Fahrzeug und Fahrzeug mit einem Sicherheitsgurtsystem Method for a seat belt system, seat belt system for a vehicle and vehicle with a seat belt system
Die Erfindung betrifft ein Verfahren für ein Sicherheitsgurtsystem in einem Fahrzeug, wobei das Sicherheitsgurtsystem einen ausziehbaren Sicherheitsgurt umfasst. Des Weiteren betrifft die Erfindung ein Sicherheitsgurtsystem für ein Fahrzeug sowie ein Fahrzeug mit einem solchen Sicherheitsgurtsystem. The invention relates to a method for a seat belt system in a vehicle, the seat belt system comprising an extendable seat belt. The invention also relates to a seat belt system for a vehicle and a vehicle with such a seat belt system.
Sicherheitsgurtsysteme für Fahrzeuge sind grundsätzlich bekannt. Diese haben die Funktion, einen mit dem Sicherheitsgurt angegurteten Fahrzeuginsassen bei großen auf den Fahrzeuginsassen wirkenden Kräften, beispielsweise bei einer Vollbremsung oder einem Crash, im Sitz zurückzuhalten und auf diese Weise die Sicherheit zu erhöhen. Safety belt systems for vehicles are known in principle. These have the function of holding back a vehicle occupant wearing the seat belt in the seat when the forces acting on the vehicle occupant are high, for example in the event of emergency braking or a crash, and in this way to increase safety.
Aus dem Stand der Technik sind dabei Sicherheitsgurte mit Gurtaufrollern bekannt, die einen Gurtstraffer aufweisen, der aktiv steuerbar ist. Bei derartigen Gurtaufrollern mit einem Gurtstraffer ist es für bestimmte Funktionen nötig, den Drehwinkel und/oder die Drehrichtung der Aufrollerwelle/Achse der Gurtspule zu kennen. Dies ist beispielsweise notwendig bei der Drehzahlüberwachung und Drehzahlregelung des Motors zum Antreiben des Gurtstraffers, oder bei der Steuerung des durch den Gurtstraffer hervorgerufenen Straffvorgangs selbst. Bei Sicherheitsgurten aus dem Stand der Technik kann dies beispielsweise mittels eines künstlich erzeugten wechselnden Magnetfelds erfolgen. Dabei wird durch ein Magnetrad oder ein anderes magnetisches Bauteil drehfest mit der Aufrollerwelle verbunden, sodass bei Rotation dieser ein periodisch wechselndes Magnetfeld erzeugt wird. Dieses Feld wird mittels eines passenden Magnetfeldsensors, üblicherweise ein Flall-Sensor, detektiert und aus den daraus gewonnenen Informationen auf die Drehzahl und/oder den Drehwinkel und/oder die Drehrichtung der Aufrollerwelle geschlossen. Die Hall-Sensoren sind in der Regel unmittelbar auf einer ECU-Platine des Gurtstraffers befestigt. From the prior art, seat belts with belt retractors are known which have a belt tensioner that can be actively controlled. In such belt retractors with a belt tensioner, it is necessary for certain functions to know the angle of rotation and / or the direction of rotation of the retractor shaft / axis of the belt reel. This is necessary, for example, when monitoring and regulating the speed of the motor for driving the belt tensioner, or when controlling the tensioning process itself. With seat belts from the prior art, this can be done, for example, by means of an artificially generated alternating magnetic field. A magnetic wheel or another magnetic component is used to connect it to the reel-up shaft in a rotationally fixed manner, so that a periodically changing magnetic field is generated when it rotates. This field is detected by means of a suitable magnetic field sensor, usually a fall sensor, and from the information obtained therefrom, the rotational speed and / or the angle of rotation and / or the direction of rotation of the reel shaft is closed. The Hall sensors are usually attached directly to an ECU board of the seat belt tensioner.
Aufgabe der Erfindung ist es, ein alternatives Verfahren bereitzustellen, mittels dem der Drehwinkel und/oder die Drehrichtung der Aufrollerwelle/Achse der Gurtspule auf einfache Weise ermittelt werden kann. Aufgabe der Erfindung ist es ferner, ein Sicherheitsgurtsystem bereitzustellen, das dazu ausgebildet ist, ein solches Verfahren auszuführen, und dabei einen alternativen, vorzugsweise vereinfachten Aufbau aufweist. The object of the invention is to provide an alternative method by means of which the angle of rotation and / or the direction of rotation of the retractor shaft / axis of the belt reel can be determined in a simple manner. The object of the invention is furthermore to provide a seat belt system which is designed to carry out such a method and which has an alternative, preferably simplified structure.
Zur Lösung der Aufgabe ist ein Verfahren für ein Sicherheitsgurtsystem in einem Fahrzeug vorgesehen, wobei das Sicherheitsgurtsystem eine Steuereinheit und zumindest einen Sicherheitsgurt mit einem ausziehbaren Gurtband, einem Gurtaufroller mit einer Gurtspule mit einem Gurtstraffer und einer Gurtbandauszugmesseinrichtung umfasst. Das Verfahren weist die folgenden Schritte auf: a) Feststellen einer Bewegung eines Motors des Gurtstraffers, b) Ermitteln einer Drehrichtung des Motors des Gurtstraffers, c) Ermitteln einer Winkeländerung einer Aufrollerwelle der Gurtspule, d) Steuerung des Motors des Gurtstraffers mittels der ermittelten Drehrichtung und Winkeländerung. To achieve the object, a method for a seat belt system in a vehicle is provided, the seat belt system comprising a control unit and at least one seat belt with an extendable belt strap, a belt retractor with a belt reel with a belt tensioner and a belt belt extension measuring device. The method has the following steps: a) determining a movement of a motor of the belt tensioner, b) determining a direction of rotation of the motor of the belt tensioner, c) determining an angle change of a retractor shaft of the belt reel, d) controlling the motor of the belt tensioner by means of the determined direction of rotation and Change of angle.
Sofern durch die Steuereinheit des Sicherheitsgurtsystems eine Bewegung des Motors des Gurtstraffers festgestellt wird, wird durch die Steuereinheit die Drehrichtung des Motors des Gurtstraffers sowie die Winkeländerung und/oder der Drehwinkel der Aufrollerwelle der Gurtspule ermittelt. Mittels der ermittelten Drehrichtung und Winkeländerung und/oder Drehwinkel kann durch die Steuereinheit der Motor des Gurtstraffers gesteuert werden. Die Drehrichtung des Motors des Gurtstraffers kann selbstverständlich auch über die Drehrichtung der Aufrollerwelle der Gurtspule bestimmt werden. If the control unit of the seat belt system detects a movement of the belt tensioner motor, the control unit determines the direction of rotation of the belt tensioner motor and the change in angle and / or the angle of rotation of the retractor shaft of the belt reel. The motor of the belt tensioner can be controlled by the control unit by means of the determined direction of rotation and change in angle and / or angle of rotation. The direction of rotation of the belt tensioner motor can of course also be determined via the direction of rotation of the reel shaft of the belt reel.
Sofern die Drehrichtung des Motors oder die Winkeländerung der Aufrollerwelle nicht ermittelt werden kann, kann die Möglichkeit bestehen, dass durch die Steuereinheit ein Not- oder Fehlerprogramm aktiviert wird. Hierbei kann beispielsweise vorgesehen sein, dass eine Steuerung des Motors und somit eine Funktion des Gurtstraffers ausgesetzt wird bis die Drehrichtung des Motors und die Winkeländerung der Aufrollerwelle wieder ermittelt werden können. Zudem kann vorgesehen sein, dass durch die Steuereinheit ein Warnsignal an den Fahrzeuginsassen ausgegeben wird. If the direction of rotation of the motor or the change in angle of the reel shaft cannot be determined, there may be the possibility that an emergency or error program is activated by the control unit. It can be provided, for example, that a control of the motor and thus a The function of the belt tensioner is suspended until the direction of rotation of the motor and the change in angle of the retractor shaft can be determined again. In addition, it can be provided that the control unit outputs a warning signal to the vehicle occupant.
Bei dem Gurtstraffers handelt es sich vorzugsweise um einen ein aktiv steuerbareren und reversiblen Gurtstraffer, der beispielsweise zum Vorstraffen des Gurtbands in einer Pre-Crash-Phase und/oder zum Straffen des Gurtbands während einer dynamischen Fahrsituation des Fahrzeugs, in dem das Sicherheitsgurtsystem angeordnet ist, genutzt werden kann. The belt tensioner is preferably an actively controllable and reversible belt tensioner, which is used, for example, to pre-tension the belt strap in a pre-crash phase and / or to tighten the belt strap during a dynamic driving situation of the vehicle in which the seat belt system is arranged, can be used.
Die Drehrichtung des Motors und die Winkeländerung und/oder der Drehwinkel der Aufrollerwelle der Gurtspule werden durch die Steuereinheit vorzugsweise über den durch die Gurtbandmesseinrichtung gemessenen Gurtbandauszug ermittelt. The direction of rotation of the motor and the change in angle and / or the angle of rotation of the reel shaft of the belt reel are determined by the control unit, preferably via the belt extension measured by the belt measuring device.
Die Steuereinheit des Sicherheitsgurtsystem kann eine elektronische Kontrolleinheit/ECU des Gurtstraffers umfassen. Alternativ kann die elektronische Kontrolleinheit/ECU des Gurtstraffers in bzw. an dem Gurtaufroller angeordnet sein und mit der Steuereinheit signalübertragend verbunden sein, sodass die Steuereinheit Signale zur Motorsteuerung an die elektronische Kontrolleinheit/ECU des Gurtstraffers übermitteln kann. The control unit of the seat belt system can comprise an electronic control unit / ECU of the seat belt tensioner. Alternatively, the electronic control unit / ECU of the belt tensioner can be arranged in or on the belt retractor and connected to the control unit in a signal-transmitting manner, so that the control unit can transmit signals for engine control to the electronic control unit / ECU of the belt tensioner.
Der Gurtbandauszug wird durch die Gurtbandauszugmesseinrichtung vorzugsweise in einem relativen Messverfahren gemessen. Relativ bedeutet hierbei, dass jeweils nur die Länge und vorzugsweise die Geschwindigkeit des Gurtbandauszugs während einer Gurtbandbewegung gemessen beziehungsweise ermittelt wird, jedoch beispielsweise nicht bekannt ist, wie weit das Gurtband bezogen auf eine Ablageposition, in der Sicherheitsgurt nicht in Benutzung ist, genau ausgezogen ist. Eine relative Messung des Gurtbandauszugs ist ausreichend, da hierüber die Drehrichtung des Motors des Gurtstraffers sowie die Winkeländerung und/oder der Drehwinkel der Aufrollerwelle der Gurtspule ausreichend genau bestimmt werden kann. Der Sensor und/oder eine Messskala der Gurtbandmesseinrichtung sind vorzugsweise in dem Gurtaufroller auf der Aufrollerwelle/ Achse angebracht bzw. angeordnet. Alternativ kann der Gurtbandauszug durch die Gurtbandauszugmesseinrichtung selbstverständlich auch absolut oder quasi absolut gemessen werden. Absolut bedeutet hierbei, dass durch die Gurtbandauszugmesseinrichtung an die Steuereinheit ein absoluter Wert des Gurtbandauszugs weitergegeben wird, das heißt, dass jeder Gurtbandauszugslänge in einer zugehörigen Messskala ein bestimmter Wert zugeordnet ist. The belt extension is preferably measured by the belt extension measuring device in a relative measuring method. Relative here means that only the length and preferably the speed of the belt webbing extension is measured or determined during a belt webbing movement, but it is not known, for example, how far the belt webbing is pulled out in relation to a storage position in which the seat belt is not in use. A relative measurement of the belt webbing extension is sufficient, since the direction of rotation of the belt tensioner motor and the change in angle and / or the angle of rotation of the reel shaft of the belt reel can be determined with sufficient accuracy. The sensor and / or a measuring scale of the belt measuring device are preferably attached or arranged in the belt retractor on the retractor shaft / axle. Alternatively, the belt extension can of course also be measured absolutely or quasi-absolutely by the belt extension measuring device. Absolute here means that an absolute value of the belt extension is passed on to the control unit by the belt extension measuring device, that is to say that a certain value is assigned to each belt extension length in an associated measuring scale.
Bei der quasi absoluten Messung wird jede Umdrehung der Gurtspule bzw. jeder Gurtbandabschnitt, der ausgezogen wird, wird erfasst, wodurch immer genau bekannt ist, wie weit das Gurtband ausgezogen ist. Bei der quasi absoluten Messung ist die Gurtbandauszugmesseinrichtung immer aktiv, das heißt, sie „schläft nicht“ bzw. hat keinen Stand-By Modus, in dem nicht gemessen wird. Auf diese Weise kann verhindert werden, dass Gurtband ausgezogen oder aufgewickelt werden kann, ohne dass dies vom Sicherheitsgurtsystem erfasst wird. With the quasi-absolute measurement, every revolution of the belt reel or every belt strap section that is pulled out is recorded, which means that it is always known exactly how far the belt strap has been pulled out. With the quasi-absolute measurement, the webbing pull-out measuring device is always active, that is, it “does not sleep” or has no stand-by mode in which no measurements are taken. In this way it can be prevented that the belt webbing can be pulled out or wound up without this being detected by the seat belt system.
Somit ist der tatsächliche Gurtbandauszug sowohl bei der absoluten als auch bei der quasi absoluten Messung jederzeit bekannt und/oder ist zuverlässig ermittelbar. Dies ist von Vorteil, sofern über den ermittelten Gurtbandauszug durch die Steuereinheit in weiteren Verfahren weitere Bedingungen überprüft werden sollen, beispielsweise ob ein Fahrzeuginsassen ordnungsgemäß angeschnallt ist (sogenannte Misuse-Detection) und/oder ob sich der Fahrzeuginsasse in einer nicht ordnungsgemäßen Sitzposition auf dem Fahrzeugsitz befindet (sogenannte Out-of-Position-Detection). Sofern eine genaue absolute Messung gewährleistet werden kann, kann der Sensor und/oder eine Messskala der Gurtbandmesseinrichtung auch auf dem Gurtband angeordnet sein. Hierfür sollte jedoch regelmäßig das Gurtband durch den reversiblen Gurtstraffer durch ein separates Verfahren eingezogen werden, um den Filmspuleffekt zu verringern oder zu vermeiden, sodass anhand des genauen Gurtbandauszugs auf die Winkeländerung der Aufrollerwelle geschlossen werden kann. Thus, the actual webbing extension is known at all times, both for the absolute and for the quasi-absolute measurement, and / or can be reliably determined. This is advantageous if further conditions are to be checked by the control unit in further processes via the determined belt strap extension, for example whether a vehicle occupant is properly buckled up (so-called misuse detection) and / or whether the vehicle occupant is in an incorrect sitting position on the vehicle seat is located (so-called out-of-position detection). If an exact absolute measurement can be guaranteed, the sensor and / or a measuring scale of the belt webbing measuring device can also be arranged on the belt webbing. For this, however, the belt strap should regularly be pulled in by the reversible belt tensioner using a separate process in order to reduce or avoid the film reel effect, so that the angle change of the reel shaft can be inferred from the exact belt extension.
Die Steuereinheit des Sicherheitsgurtsystems kann als eine separate Steuereinheit zu einer Fahrzeugsteuereinheit des Fahrzeugs ausgebildet sein oder alternativ in die Fahrzeugsteuereinheit, insbesondere den Bordcomputer des Fahrzeugs, integriert sein. Sofern die Steuereinheit separat von der Fahrzeugsteuereinheit ausgebildet ist, ist die Steuereinheit vorzugsweise so ausgebildet, dass sie mit dieser kommunizieren und Daten austauschen kann. The control unit of the seat belt system can be designed as a separate control unit for a vehicle control unit of the vehicle or, alternatively, it can be integrated into the vehicle control unit, in particular the on-board computer of the vehicle. If the control unit is separate from the Vehicle control unit is designed, the control unit is preferably designed so that it can communicate with it and exchange data.
Die Steuereinheit ist zumindest mit der Gurtbandauszugmesseinrichtung, dem Gurtstraffer und elektronische Kontrolleinheit/ECU des Gurtstraffers des Sicherheitsgurts des Sicherheitsgurtsystems signalübertragend verbunden. Vorzugsweise ist die Steuereinheit zudem mit weiteren Sensorelementen des Sicherheitsgurtsystems, wie beispielsweise dem Verschlusssensor des Verschlusses und/oder dem Drucksensor im Fahrzeugsitz, und/oder Ausgabeeinrichtungen und/oder weiteren Sensoren des Fahrzeugs verbunden. The control unit is connected in a signal-transmitting manner to at least the belt webbing extension measuring device, the belt tensioner and the electronic control unit / ECU of the belt tensioner of the seat belt of the seat belt system. The control unit is also preferably connected to further sensor elements of the seat belt system, such as the locking sensor of the lock and / or the pressure sensor in the vehicle seat, and / or output devices and / or further sensors of the vehicle.
Durch das erfindungsgemäße Verfahren kann auf einen Flall-Sensor, dessen Integration in den Gurttaufroller aufwendig ist, verzichtet werden, da die Detektion der Drehrichtung des Motors des Gurtstraffers sowie der Winkeländerung und/oder des Drehwinkels der Aufrollerwelle der Gurtspule ausreichend genau durch die Steuereinheit und/oder die elektronische Kontrolleinheit/ECU des Gurtstraffers mittels des durch die Gurtbandauszugmesseinrichtung ermittelten Gurtbandauszugs erfolgen kann. The method according to the invention makes it possible to dispense with a fall sensor, the integration of which into the belt retractor is complex, since the detection of the direction of rotation of the belt tensioner motor and the change in angle and / or the angle of rotation of the retractor shaft of the belt reel is sufficiently accurate by the control unit and / or the electronic control unit / ECU of the belt tensioner can take place by means of the belt belt extension determined by the belt belt extension measuring device.
Erfindungsgemäß ist zur Lösung der oben genannten Aufgabe auch ein Sicherheitsgurtsystem für ein Fahrzeug, insbesondere für den Schutz eines Fahrzeuginsassen vorgesehen, wobei das Sicherheitsgurtsystem eine Steuereinheit und zumindest einen Sicherheitsgurt mit einem ausziehbaren Gurtband, und einem Gurtaufroller mit einer Gurtspule, einem Gurtstraffer und einer Gurtbandauszugmesseinrichtung umfasst. Die Steuereinheit des erfindungsgemäßen Sicherheitsgurtsystems ist dazu eingerichtet, das erfindungsgemäße Verfahren auszuführen. Das Sicherheitsgurtsystem weist die entsprechenden Vorteile des zuvor genannten Verfahrens auf. According to the invention, a seat belt system for a vehicle, in particular for the protection of a vehicle occupant, is provided to solve the above-mentioned object, the seat belt system comprising a control unit and at least one seat belt with an extendable belt strap, and a belt retractor with a belt reel, a belt tensioner and a belt belt extension measuring device . The control unit of the seat belt system according to the invention is set up to carry out the method according to the invention. The seat belt system has the corresponding advantages of the aforementioned method.
Der Gurtstraffer des Sicherheitsgurts ist insbesondere als ein aktiv steuerbarer, reversibler Gurtstraffer mit einem Motor ausgebildet. The belt tensioner of the seat belt is designed in particular as an actively controllable, reversible belt tensioner with a motor.
Die Bestimmung des Drehwinkels und/oder einer Winkeländerung der Gurtspule und/oder der Drehrichtung der Gurtspule und/oder des Motors des Gurtstraffers erfolgt über den durch die Gurtbandmesseinrichtung bestimmten Gurtbandauszug. Daher wird bei dem Gurtaufroller des Sicherheitsgurts des Sicherheitsgurtsystems insbesondere kein Hall-Sensor für dieses Bestimmung benötigt. The determination of the angle of rotation and / or an angle change of the belt reel and / or the direction of rotation of the belt reel and / or the motor of the belt tensioner takes place via the belt extension determined by the belt measuring device. Therefore, in the seat belt retractor of the Seat belt system in particular does not require a Hall sensor for this determination.
In einer typischen Ausführungsform umfasst das Sicherheitsgurtsystem mehrere Sicherheitsgurte mit einem ausziehbaren Gurtband, einem Gurtaufroller mit einer Gurtspule, einem Gurtstraffer und einer Gurtbandauszugmesseinrichtung. Dabei ist insbesondere jeweils einem Fahrzeugsitz ein Sicherheitsgurt mit einem ausziehbaren Gurtband, einem Gurtaufroller mit einer Gurtspule, einem Gurtstraffer und einer Gurtbandauszugmesseinrichtung zugeordnet. Das erfindungsgemäße Verfahren kann dabei für die jeweiligen Sicherheitsgurte insbesondere geleichzeitig ausgeführt werden. In a typical embodiment, the seat belt system comprises a plurality of seat belts with an extendable belt webbing, a belt retractor with a belt reel, a belt tensioner and a belt webbing pull-out measuring device. In this case, a seat belt with an extendable belt strap, a belt retractor with a belt reel, a belt tensioner and a belt belt extension measuring device are assigned to each vehicle seat in particular. The method according to the invention can in particular be carried out simultaneously for the respective seat belts.
Des Weiteren ist erfindungsgemäß zur Lösung der oben genannten Aufgabe ein Fahrzeug mit einem erfindungsgemäßen Sicherheitsgurtsystem mit den zuvor genannten Vorteilen vorgesehen. Furthermore, according to the invention, a vehicle with a seat belt system according to the invention with the advantages mentioned above is provided to achieve the above-mentioned object.
Weitere Vorteile und Merkmale ergeben sich aus der nachfolgenden Beschreibung sowie aus den beigefügten Zeichnungen. Die Zeichnungen zeigen: Further advantages and features emerge from the following description and from the accompanying drawings. The drawings show:
- in Figur 1 einen Gurtaufroller aus dem Stand der Technik, und - In Figure 1, a belt retractor from the prior art, and
- in Figur 2 eine schematische Darstellung eines erfindungsgemäßes Fahrzeugs mit einem erfindungsgemäßen Sicherheitsgurtsystem.- In Figure 2 is a schematic representation of a vehicle according to the invention with a seat belt system according to the invention.
In Figur 1 a) ist ein Gurtaufroller 126 aus dem Stand der Technik in Form eines Aufrollerstraffers dargestellt. Der Gurtaufroller 126 umfasst eine Aufrollerwelle 128 zur Aufnahme des Gurtbands (in Figur 1 nicht gezeigt), die über eine Antriebseinheit 142 des Gurtstraffers 138 mit einem Antriebsmotor 140 des Gurtstraffers 138 zum Straffen oder Vorstraffen des Gurtbands verbunden ist. Mit dem Antriebsmotor 140, ist drehfest ein magnetisches Element 144, beispielsweise ein Magnetrad, verbunden. In unmittelbarer Nähe des magnetischen Elements 144 ist ein magnetflussführendes Element 146 angeordnet, das an einer ECU-Platine 136 des Gurtstraffers 138 befestigt ist, siehe Figur 1 b). Auf der ECU-Platine 136 ist ferner ein Hall-Sensor 148 angebracht. Das magnetische Element 144, das magnetflussführende Element 146 und der Hall- Sensor 24 bilden dabei eine aus dem Stand der Technik bekannte Vorrichtung zur Bestimmung der Drehzahl und/oder des Drehwinkels der Aufrollerwelle 128. In der Figur 2 ist ein Sicherheitsgurtsystem 10 für einen Fahrzeuginsassen 12 in einem Fahrzeug 14, das hier ein PKW ist, gezeigt. Der Fahrzeuginsassel 2 sitzt auf einem Fahrersitz 16 des Fahrzeugs 14. Das Fahrzeug 14 hat einen Antrieb zum Beschleunigen des Fahrzeugs 14 sowie einen Bremseinrichtung zum Abbremsen des Fahrzeugs 14. In FIG. 1 a), a belt retractor 126 from the prior art is shown in the form of a retractor tensioner. The belt retractor 126 comprises a retractor shaft 128 for receiving the belt (not shown in FIG. 1), which is connected via a drive unit 142 of the belt tensioner 138 to a drive motor 140 of the belt tensioner 138 for tightening or pre-tensioning the belt. A magnetic element 144, for example a magnetic wheel, is non-rotatably connected to the drive motor 140. In the immediate vicinity of the magnetic element 144, a magnetic flux-guiding element 146 is arranged, which is fastened to an ECU board 136 of the belt tensioner 138, see FIG. 1 b). A Hall sensor 148 is also mounted on the ECU board 136. The magnetic element 144, the magnetic flux guiding element 146 and the Hall sensor 24 form a device known from the prior art for determining the rotational speed and / or the angle of rotation of the reel shaft 128. FIG. 2 shows a seat belt system 10 for a vehicle occupant 12 in a vehicle 14, which here is a car. The vehicle occupant 2 sits on a driver's seat 16 of the vehicle 14. The vehicle 14 has a drive for accelerating the vehicle 14 and a braking device for braking the vehicle 14.
In einer alternativen Ausführungsform kann das Sicherheitsgurtsystem 10 mehrere Sicherheitsgurte 18 umfassen und für beliebige Fahrzeugsitze 16 in einem Fahrzeug 14 vorgesehen sein, um den entsprechenden Fahrzeuginsassen 12 in einem Rückhaltefall, wie einem Crash, zu schützen. In an alternative embodiment, the seat belt system 10 can comprise a plurality of seat belts 18 and be provided for any vehicle seats 16 in a vehicle 14 in order to protect the corresponding vehicle occupant 12 in the event of a restraint, such as a crash.
Insbesondere ist das Sicherheitsgurtsystem 10 zum Einsatz in beliebigen Fahrzeugen geeignet, insbesondere autonom fahrenden Fahrzeugen. In particular, the seat belt system 10 is suitable for use in any vehicles, in particular autonomously driving vehicles.
Das Sicherheitsgurtsystem 10 umfasst einen Sicherheitsgurt 18. Der Sicherheitsgurt 18 umfasst ein ausziehbares Gurtband sowie eine Steckzunge 22 und ein Gurtschloss 24, wobei die Steckzunge 22 in dem Gurtschloss 24 verrastbar ist. Das Gurtband 20 dient dazu, den Fahrzeuginsasse 12 im Fahrersitz 16 zurückzuhalten, wenn das Gurtschloss 24 geschlossen ist. Das Gurtschloss 24 wird geschlossen, indem die Steckzunge 22 in das Gurtschloss 24 eingeführt wird und mit diesem verrastet. The seat belt system 10 includes a seat belt 18. The seat belt 18 includes an extendable belt strap and a tongue 22 and a belt lock 24, the tongue 22 being latchable in the belt lock 24. The belt webbing 20 is used to restrain the vehicle occupant 12 in the driver's seat 16 when the belt buckle 24 is closed. The seat belt lock 24 is closed by inserting the tongue 22 into the seat belt lock 24 and locking it therewith.
Ferner umfasst der Sicherheitsgurt 18 einen Gurtaufroller 26 mit einer Gurtspule 28, auf der das Gurtband 20 zum Teil aufgewickelt ist. Das Gurtband 20 und damit der Sicherheitsgurt 18 sind auf diese Weise ausziehbar im Fahrzeug 14 aufgenommen. Der Sicherheitsgurt 18 umfasst weiterhin einen aktiv steuerbaren, reversiblen Gurtstraffer 38 mit einem Motor 40, der über eine Antriebseinheit 42, beispielsweise in Form eines Getriebes, mit der Gurtspule 28 in Wirkverbindung stehen. Der aktiv steuerbaren, reversiblen Gurtstraffer 38 ermöglicht eine wiederkehrende Straffung des Gurtbands 20 durch Aktivierung des Motors 40, sodass das Gurtband 20 beispielsweise auch bei einer dynamischen Fahrweise zur Erhöhung des Insassenkomforts gestrafft werden kann. Furthermore, the seat belt 18 comprises a belt retractor 26 with a belt reel 28 on which the belt webbing 20 is partially wound. The belt webbing 20 and thus the safety belt 18 are received in the vehicle 14 so that they can be pulled out in this way. The seat belt 18 further comprises an actively controllable, reversible belt tensioner 38 with a motor 40, which is in operative connection with the belt reel 28 via a drive unit 42, for example in the form of a gear. The actively controllable, reversible belt tensioner 38 enables a recurring tightening of the belt webbing 20 by activating the motor 40 so that the belt webbing 20 can be tightened, for example, even in a dynamic driving style to increase passenger comfort.
Durch eine Aktivierung des Gurtstraffers 38 kann die Gurtspule 28 in Rotation versetzt werden, um das Gurtband 20 einzuziehen und zu straffen. By activating the belt tensioner 38, the belt reel 28 can be set in rotation in order to draw in and tighten the belt webbing 20.
Die Gurtspule 28 weist eine Gurtbandauszugmesseinrichtung 30, beispielsweise in Form eines Spulenrotationssensors auf, mittels dem die Rotation der Gurtspule 28 und damit der aktuelle Gurtbandauszug des Gurtbands 20 relativ erfasst wird. The belt reel 28 has a belt webbing pull-out measuring device 30, for example in the form of a reel rotation sensor, by means of which the rotation the belt reel 28 and thus the current belt webbing extension of the belt webbing 20 is detected relatively.
Grundsätzlich kann die Gurtbandauszugmesseinrichtung 30 eine beliebige Einrichtung sein, die zum Ermitteln des aktuellen Gurtbandauszugs eingerichtet ist. Basically, the webbing extension measuring device 30 can be any device which is set up to determine the current webbing extension.
Zudem kann die Messung des Gurtbandauszugs durch die Gurtbandmesseinrichtung selbstverständlich auch absolut oder quasi-absolut erfolgen, insbesondere sofern der Gurtbandauszug für weitere Verfahren des Sicherheitsgurtsystems 10 genutzt werden soll. Das dargestellte Fahrzeug 14 umfasst ferner eine Ausgabeeinrichtung 34 in Form eines Anzeigeelements, das dazu geeignet ist, Informationen an den Fahrzeuginsassen 12, beispielsweise auf akustischem, optischem und/oder haptischem Wege weiterzugeben. Beispielsweise kann der Fahrzeuginsasse 12 über die Ausgabeeinrichtung darauf hingewiesen, dass er den Sicherheitsgurt 18 nicht angelegt hat. Selbstverständlich kann die Ausgabeeinrichtung 34 an jedem Ort im Fahrzeug 14 angeordnet sein, der zur Übermittlung der Informationen an den Fahrzeuginsassen 12 geeignet ist. Insbesondere kann dieIn addition, the belt strap measurement device can of course also measure the belt strap extension absolutely or quasi-absolutely, in particular if the belt strap extension is to be used for further processes of the seat belt system 10. The vehicle 14 shown further comprises an output device 34 in the form of a display element which is suitable for transmitting information to the vehicle occupant 12, for example in an acoustic, optical and / or haptic manner. For example, the vehicle occupant 12 can use the output device to indicate that he has not put on the seat belt 18. Of course, the output device 34 can be arranged at any location in the vehicle 14 that is suitable for transmitting the information to the vehicle occupant 12. In particular, the
Ausgabeeinrichtung 34 durch bereits im Fahrzeug 14 vorhandene Ausgabeeinrichtungen, wie Lautsprecher, bereitgestellt werden oder in diese integriert sein, beispielsweise in eine Instrumententafel des Fahrzeugs 14. Output device 34 can be provided by output devices already present in vehicle 14, such as loudspeakers, or be integrated into them, for example in an instrument panel of vehicle 14.
Zudem umfasst der Fahrzeugsitz 16 einen Drucksensor 32, der in der Sitzfläche des Fahrzeugsitzes 16 angeordnet ist. Über den Drucksensor 32 kann beispielsweise festgestellt werden, ob ein Fahrzeuginsasse 12 auf dem Fahrzeugsitz 16 sitzt. Zudem kann die Möglichkeit bestehen, dass über den Drucksensor 32 ein Gewicht/eine Masse des Fahrzeuginsassen 12 ermittelt wird. In addition, the vehicle seat 16 comprises a pressure sensor 32 which is arranged in the seat surface of the vehicle seat 16. The pressure sensor 32 can be used, for example, to determine whether a vehicle occupant 12 is sitting on the vehicle seat 16. In addition, there may be the possibility that a weight / mass of the vehicle occupant 12 is determined via the pressure sensor 32.
Die Gurtbandauszugmesseinrichtung 30 und der Gurtstraffer 38 sind mit einer Steuereinheit 36 des Sicherheitsgurtsystems 10 signalübertragend verbunden. Zudem sind hier auch zumindest die Drucksensoren 32 sowie die Ausgabeeinrichtung 34mit der Steuereinheit 36 signalübertragend verbunden Die Steuereinheit 36 ist im vorliegenden Fall in der Fahrzeugsteuereinheit des Fahrzeugs 14, hier dem Bordcomputer des Fahrzeugs 14, integriert. In einer alternativen Ausführungsform kann die Steuereinheit 36 des Sicherheitsgurtsystems 10 separat vorgesehen sein, wobei sie vorzugsweise mit dem Bordcomputer des Fahrzeugs 14 signalübertragend verbunden ist. Die Steuereinheit 36 kann eine elektronische Kontrolleinheit/ECU des Gurtstraffers 38 umfassen. Alternativ kann die elektronische Kontrolleinheit/ECU des Gurtstraffers in dem Gurtstraffer 38 oder dem Gurtaufroller 26 angeordnet sein und signalübertragend mit der Steuereinheit 36 verbunden sein. The belt extension measuring device 30 and the belt tensioner 38 are connected in a signal-transmitting manner to a control unit 36 of the seat belt system 10. In addition, at least the pressure sensors 32 and the output device 34 are also connected to the control unit 36 in a signal-transmitting manner. In the present case, the control unit 36 is integrated in the vehicle control unit of the vehicle 14, here the on-board computer of the vehicle 14. In an alternative embodiment, the control unit 36 of the Seat belt system 10 may be provided separately, and is preferably connected to the on-board computer of vehicle 14 in a signal-transmitting manner. The control unit 36 can comprise an electronic control unit / ECU of the seat belt tensioner 38. Alternatively, the electronic control unit / ECU of the belt tensioner can be arranged in the belt tensioner 38 or the belt retractor 26 and connected to the control unit 36 in a signal-transmitting manner.
Die Steuereinheit 36 ist für die Steuerung der zuvor genannten Systeme sowie zur Durchführung des folgenden Verfahrens zum Betrieb des Sicherheitsgurtsystems 10 eingerichtet. The control unit 36 is set up to control the aforementioned systems and to carry out the following method for operating the seat belt system 10.
Sofern durch die Steuereinheit 36 des Sicherheitsgurtsystems 10 eine Bewegung des Motors 40 des Gurtstraffers 38 festgestellt wird, wird durch die Steuereinheit 36 über den von der Gurtbandmesseinrichtung 36 ermittelten Gurtbandauszug des Gurtbands 20 die Drehrichtung des Motors 40 des Gurtstraffers 38 sowie die Winkeländerung und/oder der Drehwinkel der Aufrollerwelle der Gurtspule 28 ermittelt. Mittels der ermittelten Drehrichtung und Winkeländerung und/oder Drehwinkel kann durch die Steuereinheit 36 der Motor 40 des Gurtstraffers 38 gesteuert werden. Durch das erfindungsgemäße Verfahren kann daher auf einen Messung über einen Hall-Sensor 148 (wie in Figur 1 dargestellt) zur Bestimmung der Drehrichtung und der Winkeländerung und/oder des Drehwinkels verzichtet werden. If a movement of the motor 40 of the belt tensioner 38 is detected by the control unit 36 of the seat belt system 10, the direction of rotation of the motor 40 of the belt tensioner 38 as well as the change in angle and / or the Angle of rotation of the reel shaft of the belt reel 28 is determined. The motor 40 of the belt tensioner 38 can be controlled by the control unit 36 by means of the determined direction of rotation and change in angle and / or angle of rotation. The method according to the invention therefore makes it possible to dispense with a measurement using a Hall sensor 148 (as shown in FIG. 1) to determine the direction of rotation and the change in angle and / or the angle of rotation.
Sofern die Drehrichtung des Motors 40 oder die Winkeländerung der Aufrollerwelle der Gurtspule 28 nicht ermittelt werden kann, kann die Möglichkeit bestehen, dass durch die Steuereinheit 36 ein Fehlermeldung an die elektronische Kontrolleinheit/ECU des Gurtstraffers 38 gesendet wird und/oder ein Not- oder Fehlerprogramm aktiviert wird. Hierbei kann beispielsweise vorgesehen sein, dass eine Steuerung des Motors 40 und somit eine Funktion des Gurtstraffers 38 ausgesetzt wird bis die Drehrichtung des Motors 40 und die Winkeländerung der Aufrollerwelle der Gurtspule wieder ermittelt werden können. Zudem kann vorgesehen sein, dass durch die Steuereinheit 38 über die Ausgabeeinrichtung 34 ein Warnsignal an den Fahrzeuginsassen ausgegeben wird. Das erfindungsgemäße Verfahren kann somit zur Steuerung des Gurtstraffers 38, insbesondere zur Steuerung des Motors 40 des Gurtstraffers 38 genutzt werden, wobei in dem Gurtaufroller 28 hierfür kein Hall-Sensor 148 (wie in Figur 1 dargestellt) zur Bestimmung der Drehrichtung und der Winkeländerung und/oder des Drehwinkels benötigt wird. If the direction of rotation of the motor 40 or the change in angle of the retractor shaft of the belt reel 28 cannot be determined, the control unit 36 may send an error message to the electronic control unit / ECU of the belt tensioner 38 and / or an emergency or error program is activated. Here, for example, it can be provided that a control of the motor 40 and thus a function of the belt tensioner 38 is suspended until the direction of rotation of the motor 40 and the change in angle of the reel shaft of the belt reel can be determined again. In addition, it can be provided that the control unit 38 outputs a warning signal to the vehicle occupant via the output device 34. The method according to the invention can thus be used to control the belt tensioner 38, in particular to control the motor 40 of the belt tensioner 38, with no Hall sensor 148 in the belt retractor 28 for this purpose (as in FIG. 1 shown) is required to determine the direction of rotation and the change in angle and / or the angle of rotation.
Das Sicherheitsgurtsystem 10 ist nicht auf einen einzigen Sicherheitsgurt 18, mit einem Gurtaufroller mit einem Gurtstraffer 38 begrenzt, sondern es kann mehrere Sicherheitsgurte 18 umfassen. The seat belt system 10 is not limited to a single seat belt 18, with a belt retractor with a belt tensioner 38, but rather it can comprise a plurality of seat belts 18.
Die Erfindung ist nicht auf die gezeigte Ausführungsform beschränkt. Insbesondere können einzelne Merkmale einer Ausführungsform beliebig mit Merkmalen anderer Ausführungsformen kombiniert werden, insbesondere unabhängig von den anderen Merkmalen der entsprechenden Ausführungsformen. The invention is not restricted to the embodiment shown. In particular, individual features of one embodiment can be combined as desired with features of other embodiments, in particular independently of the other features of the corresponding embodiments.

Claims

Patentansprüche Claims
1. Verfahren für ein Sicherheitsgurtsystem (10) in einem Fahrzeug (14), wobei das Sicherheitsgurtsystem (10) eine Steuereinheit (36) und zumindest einen Sicherheitsgurt (18) mit einem ausziehbaren Gurtband (20), einem Gurtaufroller (26) mit einer Gurtspule (28) mit einem Gurtstraffer (38) und einer Gurtbandauszugmesseinrichtung (30) umfasst, mit den Schritten: a) Feststellen einer Bewegung eines Motors (40) des Gurtstraffers (36), b) Ermitteln einer Drehrichtung des Motors (40) des Gurtstraffers (38), c) Ermitteln einer Winkeländerung einer Aufrollerwelle der Gurtspule (28), d) Steuerung des Motors (40) des Gurtstraffers (36) mittels der ermittelten Drehrichtung und Winkeländerung. 1. A method for a seat belt system (10) in a vehicle (14), wherein the seat belt system (10) has a control unit (36) and at least one seat belt (18) with an extendable belt strap (20), a belt retractor (26) with a belt reel (28) with a belt tensioner (38) and a belt webbing extension measuring device (30), with the following steps: a) determining a movement of a motor (40) of the belt tensioner (36), b) determining a direction of rotation of the motor (40) of the belt tensioner ( 38), c) determining a change in angle of a retractor shaft of the belt reel (28), d) controlling the motor (40) of the belt tensioner (36) by means of the determined direction of rotation and angle change.
2. Verfahren für ein Sicherheitsgurtsystem (10) nach Anspruch 1 , dadurch gekennzeichnet, dass durch die Steuereinheit (36) ein Not- oder Fehlerprogramm aktiviert wird, sofern die Drehrichtung oder die Winkeländerung des Motors (40) nicht ermittelt werden kann. 2. The method for a seat belt system (10) according to claim 1, characterized in that an emergency or error program is activated by the control unit (36) if the direction of rotation or the change in angle of the motor (40) cannot be determined.
3. Verfahren für ein Sicherheitsgurtsystem (10) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Gurtstraffer (38) ein aktiv steuerbarer, reversibler Gurtstraffer (40) ist. 3. The method for a seat belt system (10) according to claim 1 or 2, characterized in that the belt tensioner (38) is an actively controllable, reversible belt tensioner (40).
4. Verfahren für ein Sicherheitsgurtsystem (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Drehrichtung des Motors (40) und die Winkeländerung der Aufrollerwelle der Gurtspule (28) über einen durch die Gurtbandmesseinrichtung (30) gemessenen Gurtbandauszug ermittelt werden. 4. The method for a seat belt system (10) according to any one of the preceding claims, characterized in that the direction of rotation of the motor (40) and the change in angle of the retractor shaft of the belt reel (28) are determined via a belt strap extension measured by the strap measuring device (30).
5. Verfahren für ein Sicherheitsgurtsystem (10) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Steuereinheit (36) eine elektronische Kontrolleinheit des Gurtstraffers (38) umfasst. 5. The method for a seat belt system (10) according to any one of the preceding claims, characterized in that the control unit (36) comprises an electronic control unit of the belt tensioner (38).
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Gurtbandauszug relativ gemessen wird. 6. The method according to any one of the preceding claims, characterized in that the webbing extension is measured relatively.
7. Sicherheitsgurtsystem (10) für ein Fahrzeug (14), insbesondere für den Schutz eines Fahrzeuginsassen (12), wobei das Sicherheitsgurtsystem (10) ) eine Steuereinheit (36) und zumindest einen Sicherheitsgurt (18) mit einem ausziehbaren Gurtband (20) und einem Gurtaufroller (26) mit einer Gurtspule (28), einem Gurtstraffer (38) und einer Gurtbandauszugmesseinrichtung (30) umfasst, wobei de Steuereinheit (36) dazu eingerichtet ist, das Verfahren nach einem der vorhergehenden Ansprüche auszuführen. 7. Safety belt system (10) for a vehicle (14), in particular for the protection of a vehicle occupant (12), the safety belt system (10)) having a control unit (36) and at least one safety belt (18) with an extendable belt strap (20) and a belt retractor (26) with a belt reel (28), a belt tensioner (38) and a belt webbing pull-out measuring device (30), the control unit (36) being set up to carry out the method according to one of the preceding claims.
8. Sicherheitsgurtsystem (10) nach Anspruch 7, dadurch gekennzeichnet, dass die Gurtbandmesseinrichtung (30) zur Bestimmung des Drehwinkels und/oder einer Winkeländerung und/oder einer Drehrichtung der Gurtspule (28) geeignet ist und der Gurtaufroller (26) keinen Flall-Sensor aufweist. 8. The seat belt system (10) according to claim 7, characterized in that the belt measuring device (30) is suitable for determining the angle of rotation and / or a change in angle and / or a direction of rotation of the belt reel (28) and the belt retractor (26) does not have a fall sensor having.
9. Sicherheitsgurtsystem (10) nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Gurtstraffer (38) ein aktiv steuerbarer, reversibler Gurtstraffer (38) mit einem Motor (40) ist. 9. Safety belt system (10) according to claim 7 or 8, characterized in that the belt tensioner (38) is an actively controllable, reversible belt tensioner (38) with a motor (40).
10. Fahrzeug (14), gekennzeichnet durch ein Sicherheitsgurtsystem nach einem der Ansprüche 7 bis 9. 10. Vehicle (14), characterized by a seat belt system according to one of claims 7 to 9.
PCT/EP2020/086379 2019-12-31 2020-12-16 Method for a seatbelt system, seatbelt system for a vehicle, and vehicle comprising a seatbelt system WO2021136661A1 (en)

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DE102019135925.2 2019-12-31
DE102019135925.2A DE102019135925A1 (en) 2019-12-31 2019-12-31 Method for a seat belt system, seat belt system for a vehicle and vehicle with a seat belt system

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