EP1689619A1 - Dispositif permettant de determiner la position d'un passager d'un vehicule - Google Patents

Dispositif permettant de determiner la position d'un passager d'un vehicule

Info

Publication number
EP1689619A1
EP1689619A1 EP04762466A EP04762466A EP1689619A1 EP 1689619 A1 EP1689619 A1 EP 1689619A1 EP 04762466 A EP04762466 A EP 04762466A EP 04762466 A EP04762466 A EP 04762466A EP 1689619 A1 EP1689619 A1 EP 1689619A1
Authority
EP
European Patent Office
Prior art keywords
belt
occupant
extension length
determining
force
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
EP04762466A
Other languages
German (de)
English (en)
Inventor
Marc Theisen
Alfred Kuttenberger
Michael Bunse
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1689619A1 publication Critical patent/EP1689619A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—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
    • B60R21/0155—Passenger detection systems detecting seat belt parameters, e.g. length, tension or height-adjustment sensing belt tension
    • 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
    • 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
    • B60R2022/4685—Reels with means to tension the belt in an emergency by forced winding up with means to adjust or regulate the tensioning force in relation to external parameters
    • 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 is based on a device for determining an occupant position in a vehicle according to the preamble of the independent claim.
  • the device according to the invention for determining an occupant position in a vehicle with the features of the independent claim has the advantage that a much more precise measurement than in systems available today is possible by observing the belt extension length as a function of time. This enables a better determination of the occupant position of the respective person or object. In particular, when observing over time, it is possible to make a better statement about the person in the vehicle seat, in particular with regard to his occupant class. This makes it possible in particular to distinguish whether it is, for example, a 5% woman or a heavy person.
  • the belt force is also monitored as a function of time. This makes it possible to better recognize different patterns in the course of the belt extension length and, correspondingly, the belt force.
  • the buckling process, a rest phase and an active advance can thus be identified precisely.
  • the rest position is determined on the basis of a mother comparison of the time course.
  • the use of a belt force via an actuator can be particularly helpful in order to minimize belt loosening. If there is only a slight change in the length of the belt extension over a longer period, this position can be recognized as the rest position. Deviations from this represent an active one
  • the belt pull-out speed is also determined. This is a parameter to determine the behavior of the occupant even more precisely.
  • the device is advantageously coupled to restraint means in order to control the restraint means as a function of a signal from the device.
  • restraint devices include irreversible restraint devices such as airbags and pyrotechnic belt tensioners, but also reversible restraint devices such as a reversible one
  • Belt tensioner which is actuated for example by means of an electric motor.
  • a so-called out-of-position that is to say a displacement of the occupant into the area of a front airbag
  • Reversible restraint devices which are activated as a function of a signal from the device, also include a headrest and knee pads.
  • a signal from the device can be used to check the results of other devices for determining the occupant position.
  • Such other devices are, for example, occupant detection by means of video, ultrasound or a weight sensor system, such as force measuring bolts.
  • FIG. 1 shows a block diagram of the device according to the invention
  • FIG. 2 shows a flow diagram
  • FIG. 3 shows a further block diagram
  • Figure 4a and b two typical time profiles of the belt extension length.
  • the time course of the belt extension length is used to characterize the occupant position or occupant movements.
  • This characterization can be used to control reversible and irreversible restraint devices for the purpose of occupant protection during an accident in accordance with the situation.
  • the information can serve for the plausibility check of the data of another system for monitoring the occupant position and can also be evaluated directly.
  • Reversible belt tensioners in particular provide information about the current belt extension length, which is used in an algorithm to characterize the position and movement of the occupant.
  • a major advantage of the invention is that it can offer increased comfort in conjunction with increased safety for the occupants for the reversible belt tensioners which are increasingly entering the market and which are used according to the invention both as sensors and as actuators.
  • FIG. 1 shows the device according to the invention in a block diagram.
  • a belt extension length sensor 10 is connected to a processor 12 via a first data input.
  • a belt force sensor 11 is connected to a second data input of the processor 12.
  • a belt buckle sensor 18 is connected to a third data input of the processor 12.
  • the processor 12 is connected to a memory 13 via a data input / output.
  • the processor 12 is connected to an actuator system of the belt tensioner 17 via a first data output. The is via a second data output
  • Processor 12 connected to a control device 14 for restraint means.
  • a sensor system 16 is connected via a second data input of the control device 14.
  • Control unit 14 is connected to return means 15 via a data output.
  • the belt extension length sensor 10 is, for example, a reversible electromotive
  • Belt tensioner which delivers both the belt extension length and the belt extension speed via the motor position and speed.
  • the belt force sensor 11 delivers the measured belt force.
  • the belt force sensor 11 can alternatively be dispensed with if the actuator 17 is used
  • the buckle sensor 18 provides a signal as to whether the buckle is closed or not.
  • the processor 12 now evaluates the belt pull-out length, possibly the belt pull-out speed and the belt force, depending on the course of time.
  • the processor 12 recognizes by pattern comparison whether there is an active forward displacement of the occupant.
  • the processor 12 uses data from its to compare the patterns
  • the processor 12 controls the actuator 17 so that a corresponding force is applied to the reversible belt tensioner. If there is an active advance, the processor 12 transmits this data to the control device 14 via a data line, for example a data bus or a point-to-point connection, so that the control device 14 uses the signal as a function of this signal Restraint means 15 such as airbags or belt tensioners or knee pads or head restraint can be controlled. However, the control unit 14 will only do this if the sensor system 16 detects an impact or an impending impact. In addition to impact sensors, such as acceleration sensors, which are distributed in the vehicle, the sensor system 16 also includes pre-crash sensors such as radar and ultrasound, and video. Other systems for
  • Occupant detection or position detection are subsumed in the sensor system 16.
  • An important task which the processor 12 has to fulfill is the control of the reversible belt tensioner, for example a slight increase in force after the buckling process, in order to achieve a normal value for the occupant
  • This procedure can also be used during operation to correct or optimize the characterization of normal operation. Occupants can change their seating position while driving. A particularly suitable situation for this is, for example, when the occupant returns to the car, for example after operating a switch element in the car
  • the distance to the various airbags can be determined from the belt extension length.
  • the data determined there can be checked for plausibility. For example, this is a mutual
  • this data can also be checked for plausibility. If, for example, a child seat is recognized by the weight-measuring system, this is indicated on the one hand by characteristic belt extension lengths, but above all confirmed by the low dynamics and constant normal position and standard belt loops. However, if there are major variations in the belt extension length while driving, a misclassification can be assumed. It is also possible to recognize a child seat shell from the belt extension length and the weight information.
  • FIG. 2 shows a flow diagram of the sequence through which the device according to the invention can go.
  • the belt buckle sensor 18 detects whether the belt buckle is closed or not. This is checked in method step 201. If this is not the case, the method jumps back to step 200. If this is the case, however, a jump is made to method step 202 in order to carry out the measurement of the belt extension length. The force is measured in method step 203.
  • the rest position is determined, as described above.
  • the pattern comparison is then carried out continuously in order to characterize the behavior of the occupant.
  • method step 206 it is checked whether the occupant is in the "out-of-position", that is to say in the deployment area of the airbag. If this is the case, a signal is generated in method step 207, for example to suppress a corresponding airbag or to issue a warning. If, however, the occupant is not in the deployment area of the airbag, the method jumps back to step 202.
  • FIG. 3 shows in a further example how the device 30 can be used to check the plausibility of another system for occupant detection 31.
  • the signals of these two systems are evaluated by a control unit 32 in order to determine which results are plausible and which ones
  • Curve 40 is the belt extension length over time of a heavy person.
  • Curve 41 is the belt extension length over time of a 5% woman. The seat belt takes place at time 47, which is why the belt extension length has an overshoot. This applies to both curves 40 and 41.
  • the 5% woman leans forward so that the belt extension length increases.
  • the corresponding rest phases can, however, be used to recognize that this is an active forward movement of the person and not a correspondingly heavy person in their rest position P.
  • Curve 40 also shows a forward displacement of the heavy person, so that in this case if necessary, the airbag can be suppressed.
  • At the end of curve 41 shows such a large belt extension length that exceeds that of curve 40. This shows that the dynamic consideration of the belt extension length is necessary in order to correctly interpret the results of the belt extension length measurement.
  • Figure 4b shows a person and a child seat in comparison, when a time expires
  • Buckling is usually done, is relatively well correlated with height and size in people. In this position, the straplessness caused by the clothing can be reduced significantly to a lower level 48 by a relatively small force. Due to the gradual compression of the clothing, the greater the force that can be applied, the greater the belt shortening that can be achieved. With a slow increase in strength, a characteristic, slow belt shortening can be observed.
  • the belt extension length 49 is typically very large since the belt is guided around the entire seat shell. Since the low standard belt force means that the belt fits well and there is only a small amount of belt loose, only a small reduction in the belt extension length can be achieved by increasing the force. In particular, even with a further increase in the belt force due to the lack of compressibility of the material, no further reduction in the belt extension length 50 can be achieved. A further characteristic difference arises from the property that if the belt shortening procedure for the child seat is repeated, no change in the minimum belt loops 50 is to be expected. In the case of occupancy by one person, however, slight changes in the seating position can cause a greater spread of the minimum value 51.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

L'invention concerne un dispositif permettant de déterminer la position d'un passager par la mesure de la longueur d'extraction de la ceinture de sécurité en fonction du temps. On détermine une position de repos, de préférence par une tension de la ceinture. Des modifications de la longueur d'extraction par rapport à la position de repos permettent de déterminer la position du passager et de le classer. On tient avantageusement compte de la résistance de la ceinture et de la vitesse d'extraction de la ceinture.
EP04762466A 2003-10-08 2004-07-22 Dispositif permettant de determiner la position d'un passager d'un vehicule Ceased EP1689619A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10346625A DE10346625A1 (de) 2003-10-08 2003-10-08 Vorrichtung zur Ermittlung einer Insassenposition in einem Fahrzeug
PCT/DE2004/001616 WO2005044637A1 (fr) 2003-10-08 2004-07-22 Dispositif permettant de determiner la position d'un passager d'un vehicule

Publications (1)

Publication Number Publication Date
EP1689619A1 true EP1689619A1 (fr) 2006-08-16

Family

ID=34399346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04762466A Ceased EP1689619A1 (fr) 2003-10-08 2004-07-22 Dispositif permettant de determiner la position d'un passager d'un vehicule

Country Status (4)

Country Link
US (1) US20070273139A1 (fr)
EP (1) EP1689619A1 (fr)
DE (1) DE10346625A1 (fr)
WO (1) WO2005044637A1 (fr)

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DE102005022678A1 (de) * 2005-05-17 2006-11-23 Robert Bosch Gmbh Sicherheitssystem für ein Fahrzeug
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DE102005035863A1 (de) * 2005-07-30 2007-02-01 GM Global Technology Operations, Inc., Detroit Verfahren zur Steuerung eines Gurtstraffers und Sicherheitsanordnung mit einem Gurtstraffer
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Also Published As

Publication number Publication date
US20070273139A1 (en) 2007-11-29
DE10346625A1 (de) 2005-05-04
WO2005044637A1 (fr) 2005-05-19

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