WO2016202731A1 - Dispositif pour déterminer l'angle de rotation absolu d'une bobine porte-sangle - Google Patents

Dispositif pour déterminer l'angle de rotation absolu d'une bobine porte-sangle Download PDF

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Publication number
WO2016202731A1
WO2016202731A1 PCT/EP2016/063476 EP2016063476W WO2016202731A1 WO 2016202731 A1 WO2016202731 A1 WO 2016202731A1 EP 2016063476 W EP2016063476 W EP 2016063476W WO 2016202731 A1 WO2016202731 A1 WO 2016202731A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt reel
rotation
gear
angle
rotary member
Prior art date
Application number
PCT/EP2016/063476
Other languages
German (de)
English (en)
Inventor
Armin Ilg
Stefan Friedel
Original Assignee
Trw Automotive 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 Trw Automotive Gmbh filed Critical Trw Automotive Gmbh
Publication of WO2016202731A1 publication Critical patent/WO2016202731A1/fr

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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
    • B60R22/48—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 device for determining the absolute angle of rotation of a belt reel.
  • the determination of the Gurtbandauszugseria is usually based on the detection of the rotational position of the belt reel on which the webbing is wound.
  • the absolute angle of rotation of the belt reel which - can be greater than 360 ° - starting from an initial position - when the belt reel has performed more than one revolution, it is necessary that in addition to the angular position of the belt reel and the number of revolutions of the Belt reel can be detected in both directions.
  • a belt retractor with a switching disc is disclosed in another context, which is coupled by a reduction in such a way with the belt reel that it performs approximately one revolution when the belt reel performs as many revolutions, as to the complete excerpt of on the belt reel wound webbing are required.
  • all revolutions of the belt reel are mapped to a single revolution of the indexing disk.
  • This construction has the advantage that certain switching functions, such as a child-safety function of the belt retractor, at the after complete extraction of the webbing while this wound up again on the belt reel, but can not be deducted to reliably attach a child seat to a vehicle seat, or a blocking function for the locking mechanism of the belt retractor can be realized without complex planetary gear.
  • the provided with protrusions and depressions switching disk is used exclusively to perform certain switching functions at exactly specified Gurtbandauszugsmothern. Other tasks does not meet the switching disc.
  • the object of the invention is, in a belt retractor, the absolute angle of rotation of the belt reel and thus the associated Gurtbandauszugsin with simple means, d. H. To determine sufficiently accurately with low device complexity.
  • the device according to the invention for determining the absolute angle of rotation of a belt reel comprises a belt reel, a gear and a rotary element coupled to the belt reel by means of the gearbox.
  • the transmission has a gear ratio between the belt spool and the rotary member, which is not equal to 1.
  • the device according to the invention also comprises at least one first measuring device associated with the rotary element for detecting the angle of rotation of the rotary element.
  • the invention is based on the finding that the coupling of a rotary element to the belt reel, which has a dependent of the belt reel, but deviating from this rotational behavior, opens up various possibilities to determine the absolute angle of rotation of the belt reel.
  • the gear ratio between the belt spool and the rotary member may be selected such that the detection of the rotational angle of the rotary member alone or in combination with the detection of the rotational angle of another coupled rotary member or the belt spool itself in a measuring range of 0 ° to 360 ° provides enough information to unambiguously determine the absolute angle of rotation of the belt reel, especially if it is greater than 360 °.
  • the gear ratio of the first gear is selected such that the complete rotational range of the belt reel is mapped to not more than one revolution of the first rotary element.
  • it is sufficient to provide a measuring device that covers a measuring range from 0 ° to ⁇ 360 °.
  • Each angle of rotation of the first rotary element in this area clearly corresponds to an absolute angle of rotation of the belt reel, which can be significantly greater than 360 ° according to the reduction ratio.
  • a second aspect of the invention provides a second measuring device associated with the belt reel for detecting the angle of rotation of the belt reel. Due to the gear ratio of the transmission which is not equal to 1, rotation of the belt reel causes a rotational angle change in the rotary element which is forcibly different from the corresponding rotational angle change of the belt reel.
  • Each absolute rotational angular position of the belt reel is thus characterized by a combination of a detected rotational angle of the belt reel and a detected rotational angle of the rotary element. From these rotational angle combinations can be concluded that the absolute rotation angle of the belt reel, it being sufficient that the two measuring devices cover only a measuring range of 0 ° to 360 ° or less.
  • the over- or reduction ratio of the first transmission is selected so that over the entire rotational range of the belt reel each combination of angles of rotation of the belt reel and the first rotary element occurs only once. This means that within the (limited) measuring ranges of the measuring devices, each combination of recorded angles of rotation does not occur multiple times, but only once. This fact makes the determination of the absolute rotation angle of the belt reel unambiguous, so that no further distinction or exclusion criteria are necessary.
  • the first measuring device associated with the first rotary element can finely resolve a rotational angle range which is smaller than the maximum rotational angle range of the belt reel, in particular 0 ° to 360 °, and the second associated with the belt reel Measuring device at least the Can detect number of completed rotations of the belt reel starting from an initial position.
  • This minimum criterion for the second measuring device means that it can distinguish at least between defined absolute rotational angle intervals, for. B. whether the belt reel has a total of one, two, three, ... turns performed. A more accurate resolution within these intervals is not required because the second measuring device is provided for this purpose.
  • a second rotary element coupled to the belt reel by a second gear is additionally provided in addition to the first rotary element coupled to the belt reel via a first gear.
  • the second transmission has a gear ratio which is different from the gear ratio of the first gear.
  • a second measuring device associated with the second rotary element is provided for detecting the angle of rotation of the second rotary element. Due to the different over- or reduction ratios results for each absolute rotation angle of the belt reel a certain combination of angles of rotation of the two rotary elements, which are detected by means of the associated measuring devices.
  • the over- or reduction ratios of the first gear and the second gear are chosen so that occurs over the entire range of rotation of the belt reel each combination of angles of rotation of the first rotary member and the second rotary member only once. As already explained above, this ensures that within the (limited) measuring ranges of the measuring devices, each combination of detected angles of rotation does not occur multiple times, but only once, so that no further distinguishing or excluding criteria are necessary for an unambiguous determination of the absolute angle of rotation of the belt spool ,
  • a reference point on the webbing can be provided for determining the absolute angle of rotation of the belt reel, which marks a unique absolute rotation angle of the belt reel and can be detected by means of a suitable stationary device.
  • the absolute rotation angle of the belt reel is known.
  • the rotational angle changes detected up to then and subsequently can then be related to the reference point, so that the absolute angle of rotation of the belt reel can be determined unambiguously.
  • FIG. 1 shows a first concept for detecting an absolute angle of rotation of a belt reel
  • FIG. 2 shows a second concept for detecting an absolute angle of rotation of a belt reel
  • FIG. 3 shows a third concept for detecting an absolute angle of rotation of a belt reel
  • FIG. 4 shows a fourth concept for detecting an absolute angle of rotation of a belt reel.
  • FIGS. 1 to 4 show four concepts with which the absolute angle of rotation of a belt reel 10 of a motor vehicle belt retractor can be determined.
  • the maximum rotational range of the belt reel 10, the z. B. may comprise twelve revolutions, by means of a reduction gear to a rotation range of a rotary member 12, z. B. a gear wheel, transmitted, which is not greater than 360 °.
  • the reduction ratio / ' is constant, so that each absolute rotation angle of the belt reel 10, which can be at twelve revolutions in the range of 0 ° to 4320 °, corresponds exactly to a rotation angle of the rotary member 12 between 0 ° and a maximum of 360 °.
  • the rotation of the rotary element 12 can be detected by means of a measuring device 14 assigned to the rotary element 12, the measuring range of which only needs to include the maximum rotary range of the rotary element 12 defined above.
  • the measuring device 14 does not have to have a measuring range exceeding 360 °.
  • the measuring device 14 can either detect only a rotation angle change or the rotational speed and / or acceleration.
  • FIG. 1 Another possibility for determining the absolute angle of rotation of the belt reel 10 is shown in FIG.
  • the belt reel 1 0 is in turn coupled via a gear to a rotary element 1 2, wherein the over- or reduction ratio is not equal to 1 (/ V 1).
  • Both the rotary element 1 2 and the belt reel 10 each have a measuring device 14 or 16 associated with a measuring range which is less than or equal to 360 °.
  • FIG. 3 A further alternative to the absolute rotation angle determination of the belt reel 10 is shown in FIG. 3.
  • the belt reel 10 is coupled via two different transmissions to two different rotary elements 1 2 and 1 8.
  • the respective overtial. Reduction ratios H and ⁇ 2 are not equal (H ⁇ 2).
  • Both rotary elements 1 2, 18 are each assigned a measuring device 14 or 16 with a measuring range of less than or equal to 360 °.
  • FIG 4 shows a combination of two measuring devices 14, 16, of which one measuring device 14 can finely resolve a rotational angle range which is smaller than the maximum possible rotational angle range of the belt reel 10 (eg 0 ° to 360 °), and other measuring device 16 can detect the number of total possible rotations of the belt reel 10 or an end stop or the like, which marks the maximum absolute angle of rotation of the belt reel 10 and the maximum possible webbing extension.
  • one measuring device 14 can finely resolve a rotational angle range which is smaller than the maximum possible rotational angle range of the belt reel 10 (eg 0 ° to 360 °)
  • other measuring device 16 can detect the number of total possible rotations of the belt reel 10 or an end stop or the like, which marks the maximum absolute angle of rotation of the belt reel 10 and the maximum possible webbing extension.
  • the fine-resolution measuring device 14 is assigned to a rotary element 12 which is coupled to the belt reel 10 via a reduction gear (similar to FIG. 1), while the other measuring device 16 is assigned directly to the belt reel 10.
  • the reduction ratio / ' is chosen so that a specific interval can be determined with the aid of the second measuring device 16, in which the absolute angle of rotation of the belt reel 10 is located (eg [0 °, 360 °], [360 °, 720 ° ];
  • the first measuring device 14 provides a rotation angle within a range which is not greater than the said individual interval ranges.
  • a further concept not shown concretely in the figures provides for a combination of a measuring device 16 for detecting the angle of rotation of the belt reel 10 which has no fixed reference point to an absolute position (eg zero or maximum position) with at least one reference point on the webbing which marks a definite absolute angle of rotation of the belt reel 10.
  • a reference point for example, is an absolute angle of rotation of the belt reel 10, which corresponds to a Gurtbandauszugseria, which is slightly larger than the minimum Gurtbandauszugseria (not inserted tongue of the seat belt).
  • a Gurtbandauszugseria which is slightly larger than the minimum Gurtbandauszugseria (not inserted tongue of the seat belt).
  • Such a reference point becomes the typical use the seat belt is initially recognized as soon as the seat belt is pulled out for the first time. The rotational angle changes detected up to then and subsequently can then be related to the reference point, so that the absolute angle of rotation of the belt reel 10 can be unambiguously determined.
  • a suitable, relative to the belt webbing fixed device is provided which detects the passing of the reference point.
  • the speed of the webbing extension or the acceleration of the webbing extension can be calculated from the rotational speed and the rotational acceleration.
  • the device according to the invention thus allows not only the determination of Gurtbandauszugsin and the qualitative and quantitative detection of a belt movement.

Abstract

L'invention concerne un dispositif pour déterminer l'angle de rotation absolue d'une bobine porte-sangle (10), comprenant une bobine porte-sangle (10), un engrenage et un élément rotatif (12) couplé à la bobine porte-sangle. L'engrenage présente un rapport de démultiplication ou de réduction différent de 1 entre la bobine porte-sangle (10) et l'élément rotatif (12). Le dispositif comprend en outre un premier système de mesure (14) associé à l'élément rotatif (12), qui mesure l'angle de rotation de l'élément rotatif (12).
PCT/EP2016/063476 2015-06-16 2016-06-13 Dispositif pour déterminer l'angle de rotation absolu d'une bobine porte-sangle WO2016202731A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015007555.1A DE102015007555A1 (de) 2015-06-16 2015-06-16 Vorrichtung zur Bestimmung des absoluten Drehwinkels einer Gurtspule
DE102015007555.1 2015-06-16

Publications (1)

Publication Number Publication Date
WO2016202731A1 true WO2016202731A1 (fr) 2016-12-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/063476 WO2016202731A1 (fr) 2015-06-16 2016-06-13 Dispositif pour déterminer l'angle de rotation absolu d'une bobine porte-sangle

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Country Link
DE (1) DE102015007555A1 (fr)
WO (1) WO2016202731A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019135923A1 (de) * 2019-12-31 2021-07-01 Zf Automotive Germany Gmbh Verfahren für ein Sicherheitsgurtsystem, Sicherheitsgurtsystem für ein Fahrzeug und Fahrzeug mit einem Sicherheitsgurtsystem

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017223235B4 (de) * 2017-12-19 2020-10-08 Joyson Safety Systems Germany Gmbh Gurtaufroller mit Messeinrichtung
DE102018102466B4 (de) * 2018-02-05 2021-08-05 Autoliv Development Ab Gurtaufroller, Fahrzeugsitz und Kraftfahrzeug
DE102019103598A1 (de) * 2019-02-13 2020-08-13 Trw Automotive Gmbh Verfahren zur Bestimmung des absoluten Gurtbandauszugs sowie Sicherheitsgurtsystem
DE102020109041A1 (de) * 2020-04-01 2021-10-07 Zf Automotive Germany Gmbh Sicherheitsgurtsystem sowie Verfahren zur Bestimmung der Auszugslänge eines auf einer drehbaren Gurtspule aufgewickelten Gurtbands eines Sicherheitsgurtsystems
DE102022108446A1 (de) * 2022-04-07 2023-10-12 Autoliv Development Ab Gurtaufroller mit einer Einrichtung zur Sensierung der Gurtbandauszugslänge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29820086U1 (de) 1998-11-10 1999-04-01 Trw Repa Gmbh Gurtaufroller für einen Fahrzeug-Sicherheitsgurt
DE19922720A1 (de) * 1999-05-18 2000-11-30 Trw Repa Gmbh Gurtaufroller und Verfahren zum Steuern der Funktion eines Insassen-Rückhaltesystems
DE102005017282A1 (de) * 2005-04-14 2006-10-19 Trw Automotive Gmbh Verfahren zur Steuerung oder Regelung eines elektrischen Gurtaufrollers sowie elektrischer Gurtaufroller
US20080012285A1 (en) * 2006-07-11 2008-01-17 Trw Automotive Gmbh Belt retractor for a safety belt system and method to determine a belt webbing withdrawal in a belt retractor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005042307A1 (de) * 2005-09-06 2007-03-08 Trw Automotive Gmbh Gurtaufroller
DE102006051969A1 (de) * 2006-11-03 2008-05-15 Trw Automotive Gmbh Gurtaufroller für ein Sicherheitsgurtsystem
DE102007008602A1 (de) * 2007-02-22 2007-11-22 Daimlerchrysler Ag Rückhaltesystem mit einem Sicherheistgurt

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29820086U1 (de) 1998-11-10 1999-04-01 Trw Repa Gmbh Gurtaufroller für einen Fahrzeug-Sicherheitsgurt
DE19922720A1 (de) * 1999-05-18 2000-11-30 Trw Repa Gmbh Gurtaufroller und Verfahren zum Steuern der Funktion eines Insassen-Rückhaltesystems
DE102005017282A1 (de) * 2005-04-14 2006-10-19 Trw Automotive Gmbh Verfahren zur Steuerung oder Regelung eines elektrischen Gurtaufrollers sowie elektrischer Gurtaufroller
US20080012285A1 (en) * 2006-07-11 2008-01-17 Trw Automotive Gmbh Belt retractor for a safety belt system and method to determine a belt webbing withdrawal in a belt retractor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019135923A1 (de) * 2019-12-31 2021-07-01 Zf Automotive Germany Gmbh Verfahren für ein Sicherheitsgurtsystem, Sicherheitsgurtsystem für ein Fahrzeug und Fahrzeug mit einem Sicherheitsgurtsystem

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