WO1999030934A1 - Dispositif de commande d'un moyen de protection destine a un passager d'un vehicule - Google Patents

Dispositif de commande d'un moyen de protection destine a un passager d'un vehicule Download PDF

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Publication number
WO1999030934A1
WO1999030934A1 PCT/DE1998/003148 DE9803148W WO9930934A1 WO 1999030934 A1 WO1999030934 A1 WO 1999030934A1 DE 9803148 W DE9803148 W DE 9803148W WO 9930934 A1 WO9930934 A1 WO 9930934A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
vehicle seat
pressure
control device
vehicle
Prior art date
Application number
PCT/DE1998/003148
Other languages
German (de)
English (en)
Inventor
Lorenz Pfau
Walter Jung
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1999030934A1 publication Critical patent/WO1999030934A1/fr

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
    • B60R21/01516—Passenger detection systems using force or pressure sensing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
    • G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
    • G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
    • G01G19/4142—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling activation of safety devices, e.g. airbag systems

Definitions

  • Control device for controlling an occupant protection means of a vehicle
  • the invention relates to a control device for controlling an occupant protection means of a vehicle.
  • a protection means such as the airbag is not only dependent on the one determined
  • the weight detection is a means supporting the occupant detection, the conclusions e.g. on a vehicle seat occupied by an adult occupant, a child, or an object, or on an unoccupied vehicle seat.
  • EP 0 458 102 AI discloses a seat switch in the front passenger seat, with the aid of which it can be determined whether the front passenger seat is occupied. If the front passenger seat is recognized as unoccupied, the associated front passenger airbag is not triggered in the event of an impact. The seat switch does not provide any information about the weight of a person sitting in the front passenger seat.
  • DE 42 37 072 Cl proposes a film pressure sensor for a vehicle seat, based on the output signal of which the weight of an occupant or object on the vehicle seat is classified.
  • the associated protective means - a front airbag or a side airbag - can be blocked in the event of an impact, ignited only in one stage or in multiple stages.
  • a comfort vehicle seat is known from DE 195 45 168 AI, which contains a plurality of air-filled hollow chambers in the seat and backrest. These hollow chambers can be subjected to an increasing and decreasing pressure in order to achieve a massage effect for the occupant.
  • Each hollow chamber contains a pressure sensor. The cavity pressure is regulated to a predetermined value.
  • the object of the invention is to provide a control device for occupant protection, in which the weight of an object or an occupant on a vehicle seat can be determined in a simple manner.
  • control device According to the invention the object is achieved by a control device according to claim 1.
  • today's generation vehicle seats are not only equipped with a longitudinal, height and backrest angle adjustment, but also contain various air-filled chambers in the form of bubbles in the vehicle seat fuselage and vehicle seat back.
  • a chamber usually has an airtight skin in particular.
  • the chamber can be filled with different air volumes by means of a valve in the skin.
  • An adaptation of the seat shape to the body shape of the occupant is required for a fatigue-free seat even over a long period of time. This adaptation is achieved by such chambers which can be changed in volume.
  • the valve serves as an inflow and / or outflow valve: the chamber is filled with air, for example, by means of an electrically operated air pump.
  • a vehicle seat can have one or more such air, gas or liquid filled chambers. Both the seat fuselage and the seat back preferably contain such inflatable chambers in their side areas, so that both the back part and the thighs of the vehicle occupant are supported by these edge-side, inflatable chambers.
  • An actuator for such a chamber - air pump or valve - is controlled by an electronic control which changes chamber filling volumes automatically at certain intervals. Alternatively, the vehicle occupant himself can determine the filling content of such chambers via control elements.
  • a seat length, seat height or backrest angle adjustment by means of a hydraulic actuator is known.
  • an electric motor which in turn actuates the piston of a liquid-filled actuating cylinder, is activated by an operating element actuated by the occupant.
  • the height of the vehicle seat mounted on such an actuating cylinder is changed.
  • such a chamber filled with a gaseous or liquid medium which serves the comfort of the occupant and is intended for installation in a vehicle seat or for use as an actuator for adjusting a vehicle seat, is used for determining the weight of an object or an occupant on the vehicle seat.
  • the invention is based on the knowledge that the pressure in such a chamber is proportional to the weight force acting on the vehicle seat.
  • the chamber is so in
  • the chamber pressure is therefore measured using a pressure-sensitive sensor.
  • the sensor delivers a to Chamber pressure and thus a signal proportional to the weight on the vehicle seat.
  • the advantage of the invention is in particular that chambers already arranged in / on the vehicle seat or chambers provided for the vehicle seat with the known comfort functions are now also used for safety technology. Such multiple use of the chambers considerably reduces the assembly effort related to the vehicle seat and provides weight detection for which no additional mechanical means are required, with the exception of the pressure sensor.
  • Figure 2 shows a device with a chamber and an evaluator
  • Figure 3 shows an embodiment of a control device for controlling an occupant protection means in the form of a block diagram
  • Figure 4 shows another embodiment of a control device for controlling an occupant protection means in the form of a block diagram.
  • FIG. 1 shows a chamber 1 used according to the invention, which is provided for installation in a vehicle seat or for use as an actuator for adjusting a vehicle seat.
  • the chamber 1 has an approximately cuboid shape and is filled with a gaseous or liquid medium 11.
  • the chamber 1 is usually designed such that the medium 11 cannot pass through the chamber walls defining the chamber.
  • a valve 13 is provided in one of the chamber walls for filling or emptying the chamber 1.
  • the internal chamber pressure p ⁇ is recorded by a pressure sensor 12 arranged in the chamber 1.
  • the pressure sensor 12 is preferably an integrated sensor. It is attached in a suitable manner in or on the chamber so that it can absorb the internal chamber pressure Pi.
  • FIG. 2 shows a chamber 1 according to FIG. 1, in which the pressure sensor 12 is electrically connected to an evaluator 6 for evaluating the pressure signals p transmitted by the pressure sensor.
  • the internal chamber pressure Pj increases .
  • Pressure sensor 12 then delivers a pressure signal p with an amplitude that is approximately proportional to the weight F.
  • the pressure signal p is classified in the evaluator 6. For example, the pressure signal p is divided into one of five general classes.
  • the threshold values required for classification can be raised when medium 11 is fed into the chamber.
  • the corresponding information can be tapped at the output A of the evaluator 6.
  • FIG. 3 symbolically shows an occupant 5 sitting on a vehicle seat 2.
  • the vehicle seat 2 contains a vehicle seat back 22 and a vehicle seat fuselage 21.
  • the chamber according to the invention according to FIG. 1 is introduced into the vehicle seat fuselage 21. It has a bubble-like shape and is filled with a medium 11, preferably air, to the internal pressure p ⁇ .
  • a pressure sensor 12 is attached to the chamber wall, and on the other hand a valve 13 is indicated symbolically acts a weight force F caused by the weight of the occupant 5 on the chamber 1 and thus on the pressure-transmitting medium 11 on the pressure sensor 12 in the chamber 1.
  • the pressure sensor 12 which can be designed as a pressure sensor measuring absolute or relative pressure, delivers pressure signal p proportional to the weight F to the evaluator 6.
  • the evaluator 6 classifies the pressure p preferably according to the method described in FIG. It supplies a weight signal gew to a control unit 7.
  • the control unit 7 is provided for controlling an occupant protection means of the motor vehicle. It supplies a control signal ste to an airbag device 4 in the form of a passenger airbag in the dashboard 3.
  • the control unit 7 makes a triggering decision based on signals from deformation and / or acceleration sensors not shown. Such a trigger decision is influenced by the formation of the weight signal.
  • further sensor signals can also be used for this purpose: for example, if the weight on the vehicle seat 2 is recognized as low and the belt roll length is measured to be relatively large, the presence of a reboard child seat on the vehicle seat is concluded. In this case, the control unit 7 suppresses triggering of the airbag device 4 in the event of a recognized accident, in order not to impair the health of a child lying in the child seat by inflating the airbag.
  • the chamber 1 can have an elastic chamber wall, so that the chamber is expanded and the chamber wall expands even when a small amount of air is supplied.
  • the chamber wall can be made relatively unyielding. Here air can be supplied up to a maximum volume.
  • a control unit for filling or emptying the chamber has the reference number 8 according to FIG. 3.
  • the evaluator 6 for the pressure signal p and possibly the control unit 7 for the occupant protection means can have a common microprocessor as the control unit. This can be arranged in the vehicle seat or elsewhere in the motor vehicle. Furthermore, the following spatial arrangement of the control and evaluation units appears to be advantageous:
  • the evaluator 6 is arranged together with the pressure sensor 12 in the vehicle seat, possibly on a common carrier. Via a defined interface, the evaluator 6 delivers the weight classes Gew to a control unit 7 arranged on the vehicle tunnel.
  • the control unit 8 for seat comfort functions is arranged elsewhere in the vehicle.
  • the weight F of both the vehicle seat 2 and the occupant 5 sitting thereon, which acts directly on the oil-filled chamber 1, is shown symbolically with the reference symbol F.
  • the chamber 1 is usually arranged between the vehicle body and vehicle seat 2.
  • the control unit 8 actuates a piston 14 in the cylinder 1 via an actuating signal ks. By actuating the piston 14, the height of the vehicle seat 2 can be raised or lowered.
  • the chamber 1 in turn contains the pressure sensor 12, which records the internal chamber pressure Pi and passes it on to the evaluator 6 as a pressure signal p.

Abstract

L'invention concerne une chambre remplie d'un agent gazeux ou liquide (11). Cette chambre, placée dans/sur un siège de voiture (2) ou associée à un dispositif de réglage du siège de véhicule, contient un capteur sensible à la pression (12) destiné à enregistrer la pression (pI) régnant dans la chambre. La pression (pI) mesurée dans la chambre donne une indication du poids d'un objet posé ou d'un passager assis sur le siège (2). La pression (pI) mesurée dans la chambre est ensuite utilisée pour commander un moyen de protection destiné à un passager.
PCT/DE1998/003148 1997-12-17 1998-10-27 Dispositif de commande d'un moyen de protection destine a un passager d'un vehicule WO1999030934A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19756221.3 1997-12-17
DE19756221 1997-12-17

Publications (1)

Publication Number Publication Date
WO1999030934A1 true WO1999030934A1 (fr) 1999-06-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/003148 WO1999030934A1 (fr) 1997-12-17 1998-10-27 Dispositif de commande d'un moyen de protection destine a un passager d'un vehicule

Country Status (1)

Country Link
WO (1) WO1999030934A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10015586A1 (de) * 2000-03-29 2001-10-04 Delphi Tech Inc Gewichtsbestimmung
US6476514B1 (en) 2000-03-29 2002-11-05 Ford Global Technologies, Inc. Occupant detection sensor assembly for seats
DE102004047907A1 (de) * 2004-09-29 2006-04-13 Daimlerchrysler Ag Steuervorrichtung für ein Insassenschutzmittel eines Kraftfahrzeugs
DE102015106434A1 (de) * 2015-04-27 2016-10-27 Autoliv Development Ab Airbagmodul mit luftdruckabhängigem Entfaltungsverhalten

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777175A (en) * 1972-04-11 1973-12-04 Lucas Industries Ltd Safety arrangements for road vehicles
US4022146A (en) * 1974-02-27 1977-05-10 Sadler Clinton P Fluid pressure controlled circuit breaker as boat safety apparatus
EP0345806A2 (fr) * 1988-06-10 1989-12-13 Mazda Motor Corporation Ensemble de siège d'automobile
EP0458102A1 (fr) * 1990-05-23 1991-11-27 Audi Ag Dispositif de sécurité sur un véhicule avec coussin d'air gonflable
DE4237072C1 (de) * 1992-11-03 1993-12-02 Daimler Benz Ag Resistiver Foliendrucksensor
DE19545168A1 (de) * 1995-12-04 1997-06-05 Bayerische Motoren Werke Ag Sitz mit druckveränderlichen Hohlkammern, die eine elastische Stützwand aufweisen
WO1997028989A1 (fr) * 1996-02-07 1997-08-14 Jean Leteurtre Systeme et procede de detection de presence et d'identification d'une personne ou d'un objet dans un environnement donne

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777175A (en) * 1972-04-11 1973-12-04 Lucas Industries Ltd Safety arrangements for road vehicles
US4022146A (en) * 1974-02-27 1977-05-10 Sadler Clinton P Fluid pressure controlled circuit breaker as boat safety apparatus
EP0345806A2 (fr) * 1988-06-10 1989-12-13 Mazda Motor Corporation Ensemble de siège d'automobile
EP0458102A1 (fr) * 1990-05-23 1991-11-27 Audi Ag Dispositif de sécurité sur un véhicule avec coussin d'air gonflable
DE4237072C1 (de) * 1992-11-03 1993-12-02 Daimler Benz Ag Resistiver Foliendrucksensor
DE19545168A1 (de) * 1995-12-04 1997-06-05 Bayerische Motoren Werke Ag Sitz mit druckveränderlichen Hohlkammern, die eine elastische Stützwand aufweisen
WO1997028989A1 (fr) * 1996-02-07 1997-08-14 Jean Leteurtre Systeme et procede de detection de presence et d'identification d'une personne ou d'un objet dans un environnement donne

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10015586A1 (de) * 2000-03-29 2001-10-04 Delphi Tech Inc Gewichtsbestimmung
US6476514B1 (en) 2000-03-29 2002-11-05 Ford Global Technologies, Inc. Occupant detection sensor assembly for seats
DE102004047907A1 (de) * 2004-09-29 2006-04-13 Daimlerchrysler Ag Steuervorrichtung für ein Insassenschutzmittel eines Kraftfahrzeugs
DE102015106434A1 (de) * 2015-04-27 2016-10-27 Autoliv Development Ab Airbagmodul mit luftdruckabhängigem Entfaltungsverhalten
DE102015106434B4 (de) * 2015-04-27 2017-12-14 Autoliv Development Ab Airbagmodul mit luftdruckabhängigem Entfaltungsverhalten

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